Water-based ink, method of jet application of ink, ink cartridge, unit for ink application, jet device for ink application and method of images formation

FIELD: printing industry.

SUBSTANCE: ink that contains water, water-insoluble colour and multiple water-soluble organic dissolvents is applied onto a carrier. Specified dissolvents contain a good solvent for the specified colour (A) and a poor solvent for the specified colour (B) with the ratio of A to B, equal from 10:5 to 7:9. The water-soluble organic dissolvent that has maximum value Ka, identified by Bristow method, among all water-soluble organic dissolvents in the ink, relates to poor dissolvents.

EFFECT: high extent of surface coating and high density of OD image even with small quantity of ink.

3 cl, 16 dwg, 11 tbl, 16 ex

 

The level of technology

The technical field to which the invention relates.

The present invention relates to water-based paint, which contains water-insoluble coloring material. More specifically, the present invention relates to water-based paint, which is preferably used in the printing method and device for printing using inkjet printing, and, in addition, the way inkjet imaging.

The level of technology

It is known that the ink containing the water-insoluble coloring material such as pigment (pigment ink), can provide images excellent in properties such as water resistance or light resistance. In recent years a variety of technologies to improve the optical density of the image formed using this paint. For example, a method is proposed to further improve the density of the image using paint containing samodoprinos carbon soot and some salt (we will refer, for example, patent publication 1). The proposed technology for a high-quality image in which the composition of the ink for ink-jet printing containing pigment, polymer particles, a water-soluble organic solvent and water, causing the environment to print using water is astora, containing polyvalent metal to cause a reaction between the composition of the paint and multivalent metal in aqueous solution (see, for example, unexamined application publication Japan patent No. 2000-63719). In these technologies available pigment, dispersed in the paint, make glomerulopathy on the surface of the medium to be printed, in order to prevent the penetration of the pigment in the medium for printing, there may be obtained an image of higher density than using a conventional pigment ink.

However, as a result of intensive studies, the authors of the present invention found that, when the above technologies pigment particles aglomerados on medium for printing, the area on the medium surface for printing, which should be covered with a coloring material when using a given number of drops of ink (so-called the factor space)tends to be insufficient. This means that the above techniques require more paint to get the same image density as compared with conventional pigment ink in which a pigment is dispersed with a polymer dispersant or the like. This point requires further improvement. Although there is a way to obtain a large ratio of the square with the red drops of ink by increasing the permeability of the paint in the medium of print, paint with high permeability diffuses not only on the surface of the medium to be printed, but also inside it, resulting in insufficient image density.

The authors of the present invention have studied both advantages and disadvantages of conventional paints and analyzed the characteristics of images formed by using such inks. They found that, when the ink contains a coloring material in larger quantities, there are the problems that the coloring material remains on the surface of the medium to be printed in larger numbers, are formed visually inhomogeneous dot, or coloring material is not used effectively, but is spent on losses in the medium for printing. The authors of the present invention have found that an image excellent in relation to the normal image can be obtained by solving at least one of the technical problems described below. The present invention solves at least one of the following problems.

1. When the pigment, which is in a state of dispersion in the paint, make glomerulopathy on the surface of the medium to be printed, the surface area of the medium to be printed, which can cover coloring material with the help of ink droplets of a given size (the so-called coefficient of the square), may be insufficient. In this case, if estvo paint, necessary for obtaining the same image density increases.

2. When the permeability of the ink increases, the paint is distributed not only on the surface of the medium to be printed, but also penetrates in the thickness direction of the medium to be printed. Accordingly, the coloring material may not be distributed with high density near the surface of the medium to be printed, and a high image density cannot be obtained.

Thus, the aim of the present invention is the creation of water-based paints, which provides enough space even with small drops of pigment ink (a big factor), can provide an image having a high OD (image density), and has long-term stability during storage.

Another objective of the present invention is to provide a method of inkjet printing using the above ink to form images with high resolution, high OD, using a small amount of paint.

Another objective of the present invention is to provide ink cartridge, host printing, and device for inkjet printing, which are preferably used in the above printing methods.

In addition, another objective of the present invention is to provide a method for forming images in which CME is giving flowers (flow) is effectively prevented at the boundary between the black ink and the area color paint, without causing diffusion of the ink when a color image in which different colors are adjacent to each other, is printed on plain paper.

The technical concept of the present invention may be formulated as follows: water-based paint, which contains water, a variety of different water-soluble organic solvents and water-insoluble coloring material, where the above water-soluble organic solvent is a good solvent and a poor solvent for the water-insoluble coloring material to be used, and when the values of Ka the above water-soluble organic solvents are determined by using method Bristow above poor solvent has the largest value Ka and diffuses along the surface of the medium for printing essentially in the shape of a regular circle, before diffuses a good solvent, promoting agglomeration of the above water-insoluble coloring material in the course of diffusion. Due to this structure, the water-based paint according to the present invention has the advantage that it does not necessarily contain a large amount of coloring material, which diffuses and is consumed in the form of a lossless medium for printing, not contributing to the image density, it is to this occurs in modern technology. In addition, the image can be formed in perfect condition, i.e. most of the coloring material is not localized on the surface of the medium to be printed, and at the same time, the coloring material does not reach the reverse side of the medium to be printed, thereby making it possible to print on both sides. As a result, the surface of the medium to print uniformly formed image with high density.

The best way to carry out the invention

The above objectives are achieved with the present invention, discussed below. In other words, the water-based paint in accordance with one aspect of the present invention contains water, a variety of different water-soluble organic solvents and water-insoluble coloring material, where the above water-soluble organic solvents consist of a good solvent to the above water-insoluble coloring material and a poor solvent to the above water-insoluble coloring material, and when the total amount (% wt.) good solvents in the paint is denoted as A, and the total amount (% wt.) poor solvents in the paint is denoted as B, the ratio of A to B ranges from 10:5 to 10:30, in both cases, the extreme values are included in these ranges, and when the values of Ka are shown the above water-soluble organic solvents are determined using the method of Bristow and the obtained values are compared with each other, water-soluble organic solvent having the highest value of Ka, is a poor solvent.

In addition, the water-based paint in accordance with another aspect of the present invention contains water, a variety of different water-soluble organic solvents and water-insoluble coloring material, where the above water-soluble organic solvents consist of a good solvent to the above water-insoluble coloring material and a poor solvent to the above water-insoluble coloring material, and when the values of Ka the above water-soluble organic solvents are determined using the method of Bristow and the obtained values are compared with each other, water-soluble organic solvent having the highest value of Ka, is a poor solvent, it is additionally characterized by the fact that the connection status this water-based paints with a simple paper is defined as follows: when the paint drip onto plain paper using a needle with a diameter of 28 G needle (inner diameter of 0.18 mm and an outer diameter of 0.36 mm), located at a height of 4 mm above the surface of the plain paper, and it is fixed on the surface, the measured diameter of the dot of paint on the scientists directly after the collision paint with simple paper, denoted by dI, the measured value of the largest diameter distribution of paint after fixing the ink on plain paper, denoted by dS, and the measured value of the largest diameter distribution of water-insoluble coloring material in the ink after fixing the ink on plain paper, denoted by dC, satisfy the relation below (formula 1):

dC < dI < dS (Formula 1)

and the depth of penetration of the water-insoluble coloring material in plain paper is less than 30 μm, after the ink is printed using inkjet printing and is fixed on plain paper.

In addition, in another aspect the present invention provides a method of inkjet printing, which is the stage of release of water-based paints having the above structure, by using a method of inkjet printing.

In addition, in another aspect of the present invention includes: an ink cartridge for storing ink, water-based, having the above structure; node print, containing a node for storing the water-based paints having the above structure, and a head for inkjet printing, to eject the ink; and a device for inkjet printing containing a node for storing the water-based paints having the above structure, and a head for inkjet printing,to eject the ink.

In addition, in another preferred aspect the present invention provides a method for forming images by inkjet printing on plain paper using black ink and at least one colored water-based paints, characterized in that the water-based paint having the above structure is used as a black ink, and when the image in which the image formed with the black ink and an image formed with the color ink, are formed next to each other, the image is formed by scanning for applying the black paint on the region of the black image, and then scanning for applying the color ink to the area, which was already formed black image.

In addition, in another aspect the present invention provides a water-based paint, which contains water, a variety of different water-soluble organic solvents and water-insoluble coloring material, where the above water-soluble organic solvents consist of a good solvent to the above water-insoluble coloring material and a poor solvent to the above water-insoluble coloring material, and when the largest Ka value above water is Astoriya organic solvents is determined using the method Bristow, water-soluble organic solvent having the highest value of Ka, is a poor solvent and a poor solvent penetrates into the medium for printing before it makes a good solvent, so that it promotes agglomeration of the above water-insoluble coloring material in a good solvent on the surface of the medium to be printed.

(The effect of the invention)

In accordance with the present invention, provides a water-based paint, which is a pigment ink, which has a fairly large coefficient space even for a small number of drops of paint and creates an image with high OD (image densities). In addition, in accordance with the present invention, when using this paint provides: a method of inkjet printing for forming high-resolution images with high OD even on the basis of a small additional quantity of ink; an ink cartridge, preferably used for the above printing method; node print; and a device for inkjet printing. In addition, in accordance with the present invention provides a method for forming images in which effectively prevents color mixing (flow) at the boundary between the area of the black ink and the color region of Kras and, without causing diffusion of the dye, when plain paper is formed color image in which different colors are adjacent to each other.

Brief description of drawings

Figure 1 represents a longitudinal section of the head of the unit for inkjet printing.

Figure 2 is a longitudinal section of the head of the unit for inkjet printing.

Figure 3 is a General perspective view for the head, consisting of several heads, as shown in figure 1.

Figure 4 is a General perspective view depicting an example of a device for inkjet printing.

Figure 5 is a longitudinal section of the ink cartridge.

6 is a General perspective view depicting an example of a site printing.

Fig.7 is a view showing an example of the structure of the printhead.

Fig is an example of a print head used in the present invention.

Fig.9 represents another example of a print head used in the present invention.

Figure 10 is another example of a print head used in the present invention.

11 represents another example of a print head used in the present invention;

Fig represents another example of a printhead used in anastasimatarion.

Fig represents another example of a print head used in the present invention.

Figa, 14B, 14C and 14D schematically illustrate a state where a droplet of the ink of the present invention reaches the surface of the medium to be printed.

Fig schematically illustrates the difference between the droplets of the inks of examples and comparative examples, after fixing the ink on plain paper.

Fig is a schematic view depicting the difference in the distributions of the coloring material in the direction of depth after fixing the ink on plain paper of a specific example and comparative example.

Description of the preferred embodiments

The present invention will be further described in detail below with reference to the preferred options for implementation. First, it describes the poor solvent and the good solvent used in the present description. Detailed definitions will be given later, but in the first approximation of the water-soluble organic solvent, causing a stable dispersion therein water-insoluble coloring material, called a good solvent and a water-soluble organic solvent, causing unstable dispersion therein water-insoluble coloring material, called a poor solvent NR is based on the method of dispersing water-insoluble coloring material. The authors of the present invention paid attention to a water-soluble organic solvents contained in the water-based paint with water-insoluble coloring material, and classified them in good solvents having a high capacity for dissolving or dispersing water-insoluble coloring material and a poor solvent having a poor capacity for dissolving or dispersing the coloring material. The present invention differs in that the water-based paint designed in such a way that the relationship between the poor solvent and the good solvent in the ink is set in a certain range. By adapting such a structure can be obtained an image with reduced blurring paint and spreading even on plain paper, for which there are various problems when image formation is carried out using conventional water-based paints. The present invention provides a paint that has a much greater coefficient square (forms a large square with a small number of drops of ink) and is capable of forming images with high OD. In addition, the use of such dye makes it possible to print at high speed, reducing the size of the device for printing and reduce costs, including consumables, and is moreover, it implements image with excellent durability and a higher print density. Find great impact, such as the formation of high quality images, the authors have completed the present invention.

The reason why the present invention can be obtained such advantages are not quite clear, but the authors of the present invention argue as follows. Typically, when the image is formed by using a water-based paints on a printing paper, ordinary paper, is necessary to the manufacture of coloring material, effectively held on paper, for the realization of high-density printing and print quality. As a way to accomplish this task, there is a way to attach the reaction solution to the medium to be printed, and then attach the pigment ink to the printing paper so as to obtain excellent print density and print quality. There is also a way to use special dispersant to achieve both stability of the paint during storage, and high density printing. However, in accordance with the research of the authors of the present invention, the receipt of a sufficient density printing using these methods is still challenging. In particular, it is impossible to get sufficient what about the large ratio of area using small drops of paint, as well as obtaining high-density printing.

The water-based paint according to the present invention contains at least water, a water-insoluble coloring material and a variety of water-soluble organic solvents. The above water-soluble organic solvents include good solvent to the above water-insoluble coloring material and a poor solvent to the above water-insoluble coloring material. When the water-based paint is in a liquid state, where water, water-insoluble coloring material and a water-soluble organic solvents including a good solvent and a poor solvent for the water-insoluble coloring material, mixed in a certain ratio, supports the storage stability of water-insoluble coloring material such as pigment.

When such a water-based paint of the present invention is printed on the medium for printing, and in particular, on plain paper, can be obtained exclusively excellent print density and print quality. The reason is assumed to be the following: as shown in figa when the drop 1301 paint of the present invention is applied to the environment 1300 for printing, such as ordinary paper, the ratio of water-insoluble coloring material and a good solvent and a poor solvent for the water-insoluble kasashima material, contained in the paint is changed after the ink lands on the medium to be printed. That is, as shown in figa and 14B, after the drop 1301 paint hits the surface 1300 environment to print when ink is fixed on the medium to be printed, a poor solvent 1307 having a high value of Ka, the evaporation of water diffuses among the first water-soluble organic solvents in the area near the surface of the medium to be printed in the form of an almost perfect circle, and then diffuses a good solvent with a low value of Ka, so that the formed raster dot of paint.

Figw-14D schematically depict the condition of the paint after it enters the environment 1300 for printing, and until then, until it is fixed on it. If in this case the dispersion of halftone dots of paint, the concentration of the poor solvent should be high on the periphery 1302 dot, where the paint and paper are in contact than in the center 1303 dot. As a result, when a raster dot paint diffuses along the surface of the medium to be printed in the form of an essentially correct range, the concentration of the poor solvent 1307 sharply increases, water-insoluble coloring material becomes unstable, so is the agglomeration of the coloring material or the destruction of the state of dispers is I. As a result, forming the border, which is essentially the correct circle on the surface of the paper (see figv), water-insoluble coloring material 1304 remains near the surface environment 1300 for printing, and on the periphery of the dot roller is formed from water-insoluble coloring material. Thus, it is believed that the raster point water-insoluble coloring material is formed in the shape of a regular circle and the raster point immobilized on paper in this state (see figs). At this point, formation of dots by using a water-insoluble coloring material ends, but water-soluble organic solvent and water contained in the paint, still diffuse and are distributed in a radial form. In other words, even after the formation of dot with water-insoluble coloring material, water and a water-soluble organic solvents diffuse along the surface of the medium to be printed. Subsequently, the water-soluble organic solvents evaporate or infiltrate into the medium to be printed in the center 1303, where the concentration of the good solvent is high, and the water-insoluble coloring material is also deposited in this area, so you get a raster point 1305 for imaging (see figa-14D). Color image, the SFD is certified using the above method, has a fairly large ratio of area even from a small number of drops of ink and has a high print density. In addition, since the generation of diffusion of the ink is greatly reduced, can be obtained an image with high quality.

For the above mechanism, the good solvent and the poor solvent used in the present invention, is determined from the condition whether it is beneficial to maintain the dispersed state of the water-insoluble coloring material or not. In other words, a good solvent or poor solvent is determined depending on their interaction with the water-insoluble coloring material or a dispersant. Accordingly, when choosing a good solvent and a poor solvent to obtain the ink of the present invention, preferred is the observation of the dispersed condition or stability of the water-insoluble coloring material, which should be used together with the solvent so as to choose the good and bad solvents on the basis of the results of observation. The authors of this invention have conducted various studies in relation to the criterion for the selection of good and poor solvents, which will ensure that the effects provided by the present invention, on the basis of communication with the effects on this is th invention. A solution containing approximately 50 wt%. the solvent, which should be determined, and the water-insoluble coloring material to be used in paint, aged in dispergirovannom condition at 60°C for 48 hours, the particle Size of the above solution is compared with the size of the particles of another dispersion of the pigment containing the same pigment, but a small amount of the designated solvent or not containing it. If the particle size of the investigated solution becomes more solvent is defined as representing a poor solvent, and if it is almost the same or smaller as a good solvent. The authors of the present invention found that the above definition exclusively in good agreement with the effects of the present invention.

More specifically, whether the solvent is a good solvent or poor solvent for the specific water-insoluble coloring material, is determined as follows. First, prepare two solutions of the dispersion of water-insoluble coloring material and A B:

A: the dispersion of water-insoluble coloring material containing 50 wt%. water-soluble organic solvent, which should be 5% of the mass. water-insoluble coloring material or in the amount of Wagoner starimage coloring material and substances for its dispersion, and 45% of the mass. water; and

B: a solution of aqueous dispersion containing in the amount of 5% of the mass. water-insoluble coloring material and substances for its dispersion, but without the water-soluble organic solvent.

Further to the above solution A dispersion maintained at 60°C for 48 h, and then cooled to ambient temperature. The size of the particles of A solution of the dispersion is measured by the analyzer particle size for concentrated solutions (product name: FPAR-1000; manufactured Otsuka Electronics Co., Ltd.). Similarly, the particle size of the above solution B water dispersion is measured using the above analyzer particle size for concentrated solutions. The values of the particle sizes of the above solution, A dispersion or solution B water dispersion denoted as size (A) particles and the size of the (B) particles, respectively, and using these values to determine whether the solvent is a good solvent or poor solvent in accordance with the definitions described below. And prepare the paint, having a structure according to the present invention, with the use of certain so good solvent and a poor solvent, to confirm that you have received the above-described excellent effects. Regarding the criteria for a good solvent, Plokhov the solvent, when the size of the (A) particles is larger than the size of the (B) particles according to the above definitions, a water-soluble organic solvent is called a bad solvent. When the size of the (A) particles is the same or smaller than the size of the (B) particles, water-soluble organic solvent is called a good solvent.

The water-based paint of the present invention may have the same composition as that of the conventional water-based paints containing water-insoluble coloring material, with the exception that the water-soluble organic solvents are the above specific features. In other words, the first feature of water-based paints of the present invention is that it contains water, many water-soluble organic solvents and water-insoluble coloring material, where water-soluble organic solvents include at least one good solvent and at least one poor solvent, which is determined by the above-described detection method, and when the Ka values of these water-soluble organic solvents are determined using the method of Bristow and the obtained values are compared with each other, water-soluble organic solvent having the highest value of Ka, presented yet a poor solvent. As a consequence, the stability of the dispersion of water-insoluble coloring material in the ink becomes extremely excellent, and at the same time, he has a fairly large ratio of area even for small drops of paint and demonstrates a high print density when printed on the medium for printing, in particular on plain paper, making possible the formation of images with extremely excellent quality print.

The following explains the definition of Ka values using the method of Bristow. This value is used as an index of the permeability of the ink into the medium to be printed.

In the case of liquid paint as an example, if the permeability of the dye denoted by V, i.e. the number of colors per 1 m2the amount of ink penetrating into the environment for print V (ml/m2= μm), after a certain time t, after ejection of ink droplets represented by the following formula Bristow:

V=Vr+Ka(t-tw)1/2.

In this case, immediately after deposition of ink droplets on the surface of the medium to print almost all the dye is adsorbed to an uneven parts on the surface of the medium to be printed (large portions on the surface of the medium for printing), and paint almost does not penetrate into the inner part of the environment for printing. When the paint almost does not penetrate into the inner part of the environment for print, referred to the to the contact time (tw), and the number of dye adsorbed heterogeneous parts on the environment for printing during the time of contact, referred to as Vr. When the time elapsed after the application of the ink exceeds the contact time, the amount of ink released into the environment for print, increases with additional time above the contact time, i.e. by an amount which is proportional to (t-tw)1/2. Ka is a constant of proportionality of this increase in the quantity, and it shows the value corresponding to the speed of penetration. The value of Ka can be measured by using method Bristow when using a research facility for the dynamic permeability fluid (e.g., product name: Dynamic Permeability Tester S; is Toyo Seiki Seisaku-sho, Ltd.), or something like that.

In addition, when the total amount (% wt.) good solvent in the water-based paint of the present invention is denoted as A, and the total amount (% wt.) the poor solvent in the paint is denoted as B, the water-based paint of the present invention is selected so that the ratio of A to B [total number (% mass.) good solvent in the paint to the total amount (% wt.) the poor solvent in the paint] is set in the range between 10:5 or more and 10:30 or less. It should be noted that t is pmin "total number" is used here to refer to the situation when, for example, there are many good solvents, includes all good solvents. In addition, the expression "the ratio of A to B is in the range between 10:5 or more and 10:30 or less" is used here to indicate that when A is 10, B is in the range between 5 and 30, and both extreme values are included in this range.

In addition, in another aspect of the present invention, a water-based paint containing water, a variety of different water-soluble organic solvents and water-insoluble coloring material, where the above water-soluble organic solvents consist of a good solvent to the above water-insoluble coloring material and a poor solvent to the above water-insoluble coloring material, and when the values of Ka the above water-soluble organic solvents are determined using the method of Bristow and the obtained values are compared with each other, water-soluble organic solvent having the highest value of Ka, is a poor solvent, and where, moreover, the adhesion behavior of paint with respect to plain paper is such as described below.

Found that when a water-based paint according to the present invention having the above with what ructure, fixed on plain paper, it demonstrates the behavior that differs from the usual paint. This behavior allows the paint to have a sufficiently large coefficient of space even for a small number of drops of paint and to achieve imaging with high OD (reflection density). In addition, when a color image, in which various colors are next to each other, is printed on plain paper, can achieve the effect of preventing diffusion of the dye. In other words, does the paint according to the present invention, the above remarkable effects or not, can be determined by measuring the behavior of the paint when the paint is fixed on plain paper in accordance with the following method.

To measure the behavior of water-based paints with respect to plain paper is used, first, a needle with a diameter of 28 G (inner diameter of 0.18 mm, and the outer diameter of 0.36 mm), and the tip of the needle is located at a height of 4 mm from the surface of the plain paper, and then paint falling from this height. Then paint fixed on the paper surface. At this time, the diameter of the dot of paint is measured directly after getting paint on plain paper, and the measured value is denoted as dI, and measure the greatest diameter distribution of the paint after the rise of paint on plain paper, and the measured value is denoted as dS. Also measure the largest diameter of the spread of water-insoluble coloring material in the ink after curing inks on plain paper and the measured value is designated as dC. In the case of water-based paints of the present invention, the above measurement values are in the ratio of dC < dI < dS (formula 1). In addition, the depth of penetration of the water-insoluble coloring material in plain paper is less than 30 μm, after the ink is printed and fixed on plain paper by ink-jet printing.

The above formula 1 means the largest diameter dC of the distribution of water-insoluble coloring material in the ink, depicted on figs is smaller than the diameter dI of dot paints, measured directly after getting paint, which is depicted on figv, and the greatest diameter dS spread paint after fixing the ink to the medium to be printed, shown on fig.14D is greater than dI.

Taking into account the structure of the water-based paints of the present invention, the above expression inequality means that after deposition of ink droplets on the medium to be printed, due to a poor solvent with high value Ka coloring material diff is deruet and secured near the surface of the medium to be printed in the form of essentially a perfect circle, and that water and water-soluble organic solvents contained in the paint, additional diffuse radially near the surface of the medium to be printed, and that the water-insoluble coloring material first immobilized, and then water and a water-soluble organic solvents diffuse into the medium to be printed. In addition, the feature that the depth of penetration of the water-insoluble coloring material after fixing of the ink on the medium for printing is smaller than 30 μm, means that when the water-insoluble coloring material is applied onto the medium to be printed, it effectively covers the surface of the medium to be printed.

In contrast, when the behavior of a conventional water-based paints with respect to plain paper is measured in the same way, the greatest diameter dC of the distribution of water-insoluble coloring material in the ink after curing inks on plain paper becomes greater than the diameter dI of dot paints, measured directly after getting paint on plain paper, and their relationship is expressed as dI < dC < dS. In addition, the boundary between the region of the water-insoluble coloring material and the area of water and water-soluble organic solvents, distributed around it, it becomes less clear-cut than the boundary for water-based paints on astasia invention. It shows that for a regular paint when water and water-soluble organic solvents diffuse in the medium for printing after getting paint on plain paper, water-insoluble coloring material is also distributed together with them, thereby coloring material does not effectively cover the surface of the paper. In addition, it also shows that because the boundary of the coloring material is not a perfect circle, the seal becomes fuzzy. In addition, even if between dC, dI, and the greatest diameter dS of the distribution of paint after fixing the ink on the medium for printing may be the ratio of dC<dI<dS, if the depth of penetration of the water-insoluble coloring material after fixing of the ink is 30 μm or more water-insoluble coloring material diffuses near the paper surface, but also penetrates in the direction of depth of the paper. This case also demonstrates that the coloring material is not effectively covers the paper.

In the present invention, dI, dS and dC, as defined above, shall be measured in accordance with the following methods.

First to paint add a small amount of water-soluble dye that is soluble in the water-soluble organic solvents contained in the paint, which should be measured is s, and has a hue different from the hue of the water-insoluble coloring material component of the ink, and using the paint thus obtained, the greatest diameter dS of the distribution of paint after fixing the ink on plain paper can be measured by visual observation. In other words, by adding a small amount of water-soluble dye that is soluble in the water-soluble organic solvents contained in the paint, which should be measured, and having a hue different from the hue of the water-insoluble coloring material component of the ink, the distribution terms of water and water-soluble organic solvents which penetrate the plain paper after fixing the water-insoluble coloring material in the ink, can be confirmed by visual observation due to the presence of the above water-soluble dye, is added to the paint.

The diameter dI of dot paint immediately after falling drops of paint on plain paper is measured using a Face CONTACT ANGLEMETER CA-P is Kyowa Interface Science Co., Ltd. More specifically, using a needle with a diameter of 28 G (inner diameter of 0.18 mm and an outer diameter of 0.36 mm), the needle tip is placed on a height of 4 mm from the surface of the simple b the sorcerers, then paint falling from that height on plain paper, and after dripping the diameter of ink droplets read from the scale measuring contact angle, thereby measuring the value of dI. That is, the above registered values represent the diameter of a dot of paint dI directly after touching the paint with a simple paper.

The greatest diameter of dS spread paint after fixing the ink on plain paper and the largest diameter dC of the distribution of water-insoluble coloring material in the ink after curing inks on plain paper is measured as follows. Dot paint got on plain paper under the above conditions, leave for 6 hours or more, and after stabilization of ink droplets measure the size of the dot of paint. The greatest diameter of dS spread paint after fixing the ink on plain paper is obtained by measuring the largest linear size distribution of the hue of the water-soluble dye having a hue different from the hue of the water-insoluble coloring material contained in the paint. After that receive the largest diameter dC of the distribution of water-insoluble coloring material in the ink after curing inks on plain paper by measuring the largest linear size distribution, Meuse what about the tint of the water-insoluble coloring material, contained in the paint.

In addition, the depth of penetration of the water-insoluble coloring material after fixing of the ink on plain paper get through the transverse cutting of the printing plain paper after printing using an inkjet printer, and then observing the cross-section under a microscope.

To raster point paint had such a form, when the total amount (% wt.) good solvent (solvents) in the paint is denoted by A and the total amount (% wt.) bad solvent (solvents) in the paint is denoted by B, the ratio of A to B [total number (% mass.) good solvent (solvents) in the paint : the total amount (% wt.) bad solvent (solvents) in the paint] is preferably in the range between 10:5 or more and 10:30 or less, more preferably, between 10:5 or more and 10:10 or less, and particularly preferably in the range between 10:6 or more and 10:10 or less.

The water-based paint of the present invention is characterized by the fact that when the values of Ka are many different types of water-soluble organic solvents contained in the paint, are determined using the method of Bristow and the obtained values are compared with each other, water-soluble organic solvent having the highest value of Ka is a bad the solvent. In addition, in accordance with the research of the authors of the present invention to achieve a further improvement in the quality of the printed image dye preferably pick up so that the Ka value becomes smaller than 1.5 (ml/m2/MS1/2), more preferably of 0.2 (ml/m2/MS1/2or more but less than 1.5 (ml/m2/MS1/2). In other words, if the ink is prepared so that it had a Ka value of less than 1.5 (ml/m2/MS1/2), the separation of solids and liquids occurs early in the process, when the ink penetrates into the medium to be printed, so there may be obtained a high-quality image with very little blurring of the ink. At the same time, setting the value of Ka paint, equal to 0.2 (ml/m2/MS1/2or more, you can get preferred ability to consolidate.

It is noted that the Ka value determined by using method Bristow in the present invention, is measured using as a medium for printing plain paper [for example, paper PB used for electrophotographic copying machine, a sheet of printer (laser printer or an inkjet printer manufactured by Canon Inc., or PPC paper used for electrophotographic copying machines]. Environment for measurement is arranged in which predpolojenii conditions normal office environment, such as temperature in the range between 20°C and 25°C and humidity between 40% and 60%.

Incidentally, when the image is formed using both black and colored inks on plain paper, if the water-based paint of the present invention is used as a black ink, as described above, it is believed that the agglomeration or the destruction of the dispersion of the coloring material constituting the black paint that is faster than the other colors. In the method of forming images according to the present invention, the water-based paint of the present invention is used as a black ink, and image formation using color ink is carried out after forming the image using black ink, and more preferably, is scanning for applying the black paint, and after implementation, at least some portion of one scan perform scan to attach color paint. By adapting this method, even when the black ink comes into contact with the color ink, color mixing or spreading of colors between black ink and colored ink on paper does not, thereby, achieved an excellent effect against spreading when printing. In other words, in accordance with the present invention described above, high is output effects can be achieved by implementing only the formation of an image using each color, from the black and color inks, with some interval, replacing the method of multi-pass printing with multiple scans, which requires a lot of time printing, or method of using systems with different regeneration for black and color inks, which lead to larger devices.

In addition, when using water-based paint of the present invention, since the coloring material contained in the paint, now kept in the medium for printing, for the reasons described above, it becomes possible to carry out the printing of high density with less ejected amount of ink (droplet volume)than the regular paint. In addition, since the printing can be performed with a smaller amount of ink can be obtained effects such as reducing the cost of imaging or achieving less time fixing compared to conventional paint.

The water-based paint of the present invention differs in that the water-soluble organic solvents contained in the paint, have a composition as described above in relation to the water-insoluble coloring material to be used. In addition to this composition, the water-based paint of the present invention may have the same structure as a conventional water-based paints. Each is omponent, constituting the ink of the present invention, will be described below. First will be described aqueous medium, dispersing water-insoluble coloring material.

<Water>

The water-based paint according to the present invention contains a solvent mixture of water and a water-soluble organic solvents. Water-soluble organic solvents may be selected from the substances listed below. In the present invention, when choosing a water-soluble organic solvents, first determine whether the solvent is a good solvent or a poor solvent with respect to water-insoluble kasashima material that should be used, and then, based on the determination results, choose a water-soluble organic solvents in such a way that they contain, at least, as a good solvent and a poor solvent, and that the content of each water-soluble organic solvent is in the range defined in the present invention, and then mix them accordingly, so as to prepare a paint.

Specific examples of such water-soluble organic solvents may include: alkalemia alcohols containing from 1 to 4 carbon atoms, such as methyl alcohol, ethyl alcohol, n-propyl alcohol,isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol or tert-butyl alcohol; amides, such as dimethylformamide or dimethylacetamide; ketones or ketone alcohols such as acetone or datetoday alcohol; ethers, such as tetrahydrofuran or dioxane; polyalkylene glycols such as polyethylene glycol or polypropyleneglycol; alkalophile, which Allenova group contains from 2 to 6 carbon atoms, such as ethylene glycol, propylene glycol, butyleneglycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol, hexyleneglycol or diethylene glycol; acetate simple lower Olkiluoto ester such as acetate simple nanometrology ether of polyethylene glycol; glycerin; ethers of polyols on the basis of the lowest Akilov, such as a simple onomatology (or ethyl) ether of ethylene glycol, simple methyl (or ethyl) ether of diethylene glycol, or a simple onomatology (or ethyl) ether, triethylene glycol; N-methyl-2-pyrrolidone, 2-pyrrolidone and 1,3-dimethyl-2-imidazolidinone. In addition, water is mainly used deionized water.

The content of water-soluble organic solvents in the water-based paint according to the present invention is not limited in any way. Preferably it is within 3% of the mass. up to 50% of the mass. in relation to the total weight of the paint. Content is the water in the ink is preferably in the range from 50 wt%. up to 95% of the mass. in relation to the total weight of the paint.

In a preferred embodiment of the present invention, the type and content of water-soluble organic solvent comprising a water-based paint, are chosen so that when the total amount (% wt.) good solvent (solvents) in the paint is denoted by A, and the total amount (% wt.) bad solvent (solvents) in the paint is denoted by B, the ratio of A to B ranges from 10:5 to 10:30, both extreme values are included in these limits, preferably in the range of 10:5 or more to 10:10 or less, and more preferably in the range of 10:6 or more to 10:10 or less.

In accordance with a detailed research of the authors of the present invention, when the ratio of the good solvent (solvent)contained in the water-based paint, is higher than the above range, it becomes difficult obtaining printing of high density, although it is excellent in stability during storage. In contrast, when the ratio of the good solvent (solvent)contained in the water-based paint is less than the above limit, sufficient storage stability may not be obtained, although there may be obtained a high print density. In opposite to the th these cases, when the ratio of the good solvent (solvents) and poor solvent (solvents) in the water-soluble organic solvents contained in the paint, is set as above, can be obtained as the stability of the paint during storage, and high density printing. In addition, in the present invention, as stated above, when the type of the water-soluble organic solvents contained in the paint, is determined in accordance with the value of Ka, which is defined by the way Bristow, which is an index showing the permeability of each water-soluble organic solvent in the medium for printing, can be obtained a water-based paint, which has a fairly large coefficient square even with the small amount of ink droplets, and can achieve high-density printing. Such effects were not achieved until the present time.

The stability of the paint at the store, usually means the stability of the paint in the condition without evaporation of water. High density printing is implemented by the phenomenon of agglomeration of the pigment, which occurs when the distribution of the solvent on the paper during the formation of dots of ink when the ink hits the paper.

Furthermore, in addition to the effects described above, such as the implementation of stability-high volt is in storage, and high-density printing, sharing the good solvent and the poor solvent in the paint leads to prevention effect, to a certain extent, agglomeration of the pigment, when the ink evaporates water. More specifically, when a drop of ink attached to the nozzle of the printhead, the density of the coloring material in the ink is increased under the action of evaporation of the ink. At this point, the joint presence of a good solvent and a poor solvent in the paint can to a certain extent to prevent agglomeration of the pigment under the action of a good solvent. Thus, when the ink contains a good solvent, to prevent agglomeration of the pigment on the nozzle of the printhead, and for this reason you can expect to increase the reliability of the operation of the regeneration of the printhead.

<a water-Insoluble coloring material>

Now will be described water-insoluble coloring material constituting the water-based paint according to the present invention. Regardless of system dispersion, water-insoluble coloring material constituting the water-based paint of the present invention may be a pigment dispersed using a dispersant resin or surfactant (a pigment dispersed with a resin, the pigment is dispersed with a surface-active agent), or coloring material, dispersible without the use of dispersant, and the like, due to the high dispersive ability of the pigment of the coloring material, such as microencapsulating pigment, sandipanirishi pigment having a hydrophilic group attached to the surface of the pigment particles, and a modified pigment, in which a polymeric organic groups are chemically bound on the surface of the pigment particles (sandipanirishi, polimerazami pigment). Of course, these dispersed pigments of various types can be used in combination. The content of water-insoluble coloring material is from 0.1% to 15 wt. -%, and more preferably, from 1% to 10 wt. -%, in relation to the total weight of the paint. These pigments used in the present invention, will be described below.

[Pigment]

The pigments used for water-based paints of the present invention, is not specifically limited, and can be used any of the following pigments.

Carbon black is preferred as the pigment used for the black paint. Examples of such carbon black may include chimney soot, lamp black, acetylene soot and gas channel soot. More specifically, can the be used commercially available products, discussed below: Raven 7000, Raven 5750, Raven 5250, Raven 5000 ULTRA, Raven 3500, Raven 2000, Raven 1500, Raven 1250, Raven 1200, Raven 1190 ULTRA-II, Raven 1170, and Raven 1255 (all of them are Colombia Co., Ltd.), Black Pearls L, Regal 400R, Regal 330R, Regal 660R, Mogul L, Monarch 700, Monarch 800, Monarch 880, Monarch 900, Monarch 1000, Monarch 1100, Monarch 1300, Monarch 1400, Monarch 2000, and Valcan XC-72R (all of them are produced by Cabot Corp.), Color Black FW1, Color Black FW2, Color Black FW2V, Color Black FW18, Color Black FW200, Color Black S150, Color Black S160, Color Black S170, Printex 35, Printex U, Printex V, Printex 140U, Printex 140V, Special Black 6, Special Black 5, Special Black 4A and Special Black 4 (all manufactured by Degussa Corp.), No. 25, No. 33, No. 40, No. 47, No. 52, No. 900, No. 2300, MCF-88, MA600, MA7, MA8 and MA100 (all manufactured by Mitsubishi Chemical Corp.). In addition, it can also be used carbon black, again produced for the present invention. However, the present invention is not limited to this but may be any commonly known carbon black. In addition, such a black pigment is not limited to carbon black, but also magnetic particles such as magnetite or ferrite, and titanium black may also be used as a black pigment.

Specific examples of the organic pigment may include insoluble azo pigments such as TB Red, TB Maroon, Hansa Yellow, Benzidine Yellow or Pyrazolone Red; soluble azo pigments such as Lithol Red, Helio Bordeaux, Pigment Scarlet or Permanent Red 2B; derivatives VAT dyes such as alizarin, indanthren or thioindigo maroon, ftlot animovie pigments, such as phthalocyanine blue or phthalocyanine green, chinaredorbit pigments, such as genocidally red or genocidally purple, Pereladova pigments, such as perylenebis red or perylenebis bright red, isoindoline pigments, such as isoindoline yellow or isoindoline orange, imidazolone pigments, such as benzimidazolone yellow, benzimidazolone orange or benzimidazolone red, philanthropie pigments, such as philanthropy red or philanthropy orange-based pigment, Indigo, condensed azo pigments, pigments based on thioindigo, diketopiperazine pigments, flavanonols yellow, acylamide yellow, chieftancy yellow, Nickel azo yellow, azo copper methine yellow, purinovy orange, astronomy orange, ventriculography red and dioxazine violet. Of course, organic pigments is not limited to this, but can also be used and other organic pigments.

In addition, when organic pigments that can be used in the present invention, are indicated by the values of the color index (C. I.), examples of such values C. I. may include a yellow pigment C. I.№№12, 13, 14, 17, 20, 24, 74, 83, 86, 93, 97, 109, 110, 117, 120, 125, 128, 137, 138, 147, 148, 150, 151, 153, 154, 166, 168, 180 and 185, orange the initial pigment with C. I.№№16, 36, 43, 51, 55, 59, 61 and 71, the red pigment C. I.№№9, 48, 49, 52, 53, 57, 97, 122, 123, 149, 168, 175, 176, 177, 180, 192, 215, 216, 217, 220, 223, 224, 226, 227, 228, 238, 240, 254, 255 and 272, the purple pigment C. I.№№19, 23, 29, 30, 37, 40 and 50, blue pigment C. I.№№15, 15: 1, 15: 3, 15: 4, 15: 6, 22, 60 and 64, the green pigment C. I. No. 7 and 36 and brown pigment C. I. No. 23, 25 and 26.

[Pigment dispersible resin]

As stated above, the pigment dispersible resin, that is, the pigment dispersible through the use of a dispersant, may be used as the water-insoluble coloring material contained in the water-based paint according to the present invention. In this case, connection is required for dispersion of each of the above hydrophobic pigments. As such compounds can be used so-called dispersant comprising a surfactant and a dispersant resin or the like. Such dispersing agents or surfactants are not in any way limited, but, among other things, can preferably be used anionic compounds or non-ionic compounds. Examples of such anionic compounds may include a salt of fatty acid, alkylsulfate, alkylbenzene sulfonate, alkylnaphthalene sulfonate, dialkyl sulfosuccinate, alkyl phosphate, a condensate of naftalina fonate with formalin alkyl polyoxyethylene sulfate, and their substituted derivatives. Examples of such nonionic compounds can include simple polyoxyethylene alkilany ether, simple polyoxyethylene alkylphenolic ether complex polyoxyethylenic a fatty acid ester, complex arbitarily a fatty acid ester, complex polyoxyethylene-arbitarily a fatty acid ester, polyoxyethylene alkylamine, complex, glycerin fatty acid ester, a oksietilenom-oxypropylene block copolymer and their substituted derivatives. Examples of the dispersant resin may include a block copolymer, a statistical copolymer, graft copolymer and their salts, which consist of at least two monomers (at least one of them is a hydrophilic monomer)selected from the group consisting of styrene and its derivatives, vinylnaphthalene and its derivatives, esters of fatty alcohols with α,β-ethylene unsaturated carboxylic acid, acrylic acid and its derivatives, maleic acid and its derivatives, basis of itaconic acid and its derivatives, fumaric acid and its derivatives, and vinyl acetate, vinyl alcohol, vinylpyrrolidone, acrylamide and their derivatives.

[Microencapsulating pigment]

As stated above, the water-insoluble coloring material can be coated with an organic polymer to microinch is lirovaniya, so to get microencapsulating pigment that can be used as a water-insoluble coloring material for water-based paints of the present invention. Examples of such a method of coating water-insoluble coloring material organic polymers to microencapsulate may include chemical production method, physical method of production, physico-chemical production method and a mechanical method of production. Specific examples of such methods may include a method of interfacial polymerization, a method of polymerization in situ, the method of applying curing the coating by immersing in a liquid, the method koatservatsii (phase separation), the method of drying is immersed in a fluid, the method of cooling of the melt dispersion, a method of coating an air suspension, a method of drying by atomization, the way of acid deposition and method of emulsification treatment phases.

Examples of the organic polymer used as the material for the microcapsules may include polyamide, polyurethane, polyester, polyurea, epoxy resin, polycarbonate, urea resin, melamine resin, phenolic resin, polysaccharide, gelatin, Arabic gum, dextran, casein, protein, natural rubber, carboxypolymethylene, polyvinyl alcohol, polyvinyle religon, the polyvinyl acetate, polyvinyl chloride, grades, pulp, ethylcellulose, methylcellulose, nitrocellulose, hydroxyethyl cellulose, cellulose acetate, polyethylene, polystyrene, a polymer or copolymer of (meth)acrylic acid, a polymer or copolymer of ester (meth)acrylic acid, copolymer of (meth)acrylic acid, a complex ester of (meth)acrylic acid, a copolymer of styrene-(meth)acrylic acid, a copolymer of styrene-maleic acid, sodium alginate, fatty acid, paraffin, beeswax, Chinese wax, solid beef tallow, Carnauba wax and albumin.

Among these can be used organic polymers having anionic group such as a carboxylic acid group or sulfonic acid group. In addition, examples of the nonionic organic polymer may include polyvinyl alcohol, polyethylene-glycol monomethacrylate, polypropyleneglycol monomethacrylate, methoxypolyethyleneglycol monomethacrylate, (co)polymers, and cationic polymers by ring opening of 2-oxazoline. Among them is fully kataliziruemyj product of polyvinyl alcohol is especially preferred because it has low solubility in water and readily soluble in hot water but poorly soluble in cold water.

When the method microencapsulation vybere is by way of phase separation or method of acid deposition, anionic organic polymers can be used as an organic polymer for the formation of microcapsules. In the method of separation of the phases is used as the organic solvent phase composite or complex, consisting of anionic organic polymer having the ability to satisfashion or dissolved in water, and coloring material, such as sandipanirishi organic pigment or carbon black, or a mixture of the coloring material, such as sandipanirishi organic pigment or carbon black, curing agent and anionic organic polymer. The method of separation of the phases involves adding water to the above phase organic solvent or adding a specified phase of organic solvent in water, in order to carry out the microencapsulation with samogazirovannoe (emulsification with the separation of the phases). In the above method, a phase separation into a phase of organic solvent may be added water-soluble organic solvents or additives that should be used for paint. Taking into account that the dispersion for paints can be done directly, is particularly preferred mixing a liquid medium to paint in phase organic solvent.

With another article the Rhone, in the way of acid deposition, slurry cake get through stages: neutralize part or all of the anionic groups of the organic polymer containing anionic groups, using the primary connection and kneading of the polymer together with the coloring material, such as sandipanirishi organic pigment or carbon black in an aqueous medium; and bringing the pH of the mixture to neutral or acid with acid compounds, so that the organic polymer containing anionic group, praecipitium, sticking to the pigment. The obtained water-containing cake is subjected to microencapsulation by neutralization with all anionic groups or parts of the main connection. Using this method can be obtained anionic microencapsulating pigment, which is fine and includes a large number of pigments.

Examples of the solvent used for the above microencapsulation, may include alkalemia alcohols, such as methanol, ethanol, propanol or butanol; aromatic hydrocarbons, such as benzene, toluene or xylene; esters such as methyl acetate, ethyl acetate or butyl acetate; chlorinated hydrocarbons, such as chloroform or ethylene dichloride; ketones, such as acetone or methyl isobutyl ketone; ethers, such as Tetra drofuran or dioxane; and cellosolve, such as methylcellosolve or butylcellosolve. In addition, the microcapsules obtained using the above method, is subjected to separation in a centrifuge or filtration to separate them from the solvent, then mixed with water or proper solvent, and the mixture is stirred, and then again dispersed, so as to gain microencapsulating the pigment of interest. The average particle size microencapsulating pigment obtained by the above method, preferably is in the range between 50 nm and 180 nm.

[Sandipanirishi pigment]

As stated above, as the water-insoluble coloring material contained in the water-based paint of the present invention, can be used sandipanirishi pigment capable of dispergirujutsja without dispersant. As indicated above satismarriages pigment has a pigment in which a hydrophilic group chemically bound to the surface of the pigment particle directly or via other atomic groups. For example, it is preferable to use a pigment in which a hydrophilic group introduced on the surface of the pigment particles, represents a group selected from the group consisting of-COOM1, -SO3M1 and-PO3H(M1)2(g the e-M1 is a group, selected from the group consisting of hydrogen atom, alkali metal, ammonium and organic ammonium compounds). The above is another group of atoms, which may represent a group selected from the group consisting of alkalinous group containing 1-12 carbon atoms, substituted or unsubstituted phenylenebis group and a substituted or unsubstituted Neftyanoi group, may also preferably be used. In addition, can also preferably be used samodisciplina pigments obtained through the following methods of surface oxidation is a method of oxidizing carbon black with sodium hypochlorite; a method of oxidizing carbon black with ozone water and a method, which includes the impact on carbon black carbon, ozone, and then the impact on her wet oxidation using an oxidizing agent in order to modify the surface of carbon black.

[Sandipanirishi pigment with an associated polymer]

As stated above, as the water-insoluble coloring material contained in the water-based paint of the present invention, can be used sandipanirishi pigment polymer-binding type, capable of dispersing without using a dispersant. This sandipanirishi Polimers yuushi pigment, do not use dispersant, preferably a product of the reaction between the functional groups that are chemically bound to the surface of the pigment directly or through another group of atoms, and a copolymer of an ionic monomer and a hydrophobic monomer. In other words, when used sandipanirishi polimerazami pigment having this structure, the ratio of copolymerization between an ionic monomer and a hydrophobic monomer, i.e. the starting materials for the copolymer, designed for surface modification of pigment may vary accordingly, thus allowing proper control of hydrophilicity of the modified pigment. Accordingly, sandipanirishi polimerazami pigment with the above structure is preferable. In addition, the type of ionic monomer and a hydrophobic monomer to be used may be selected appropriately, or their combination can be changed accordingly, so that the surface of the pigment can be given different properties. Also from this point of view, the above sandipanirishi polimerazami pigment is preferred.

(Functional group)

The functional group contained in pointed to by the m above satismarriages polymer-binding pigment, chemically binds with the surface of the pigment directly or via other atomic groups. Functional group forms an organic group through reaction with the copolymer described below. The type of functional group is chosen here in combination with the functional group of the copolymer. Taking into account the fact that the pigment is dispersed in an aqueous medium, the reaction between the functional group and the copolymer preferably forms a bond that is not hydrolyzes, such as the reaction that causes the formation of amide linkages. As the functional group is amino group, the copolymer has a carboxyl group, so that the copolymer can be introduced onto the surface of the pigment particles through amide linkages. In another case, as a functional group, a carboxyl group is used, and a copolymer carries the amino group, so that the copolymer can be introduced onto the surface of the pigment particles through amide linkages.

In this case, a functional group that chemically binds to the surface of the pigment can directly contact him or can contact him through another group of atoms. However, when the surface of the pigment is injected copolymer with a relatively high molecular weight to prevent steric repulsion between ACPs what Karami, is preferable to the introduction of functional groups on the surface of the pigment through another group of atoms. Another group of atoms is not limited in any way, unless she is a polyvalent element or an organic group. From the point of view of regulating the distance of the functional groups from the surface of the pigment, for the above reasons, is preferably used, for example, divalent organic residue. Examples of such divalent organic residue may include alkylenes group and Allenova group (fenelonov group).

More specifically, in the examples described below, for example, pigment interacts with AMINOPHENYL(-sulfoethyl)sulfona to enter phenyl(2-sulfoethyl)sulfonic group on the surface of the pigment. After that, the amino group pentachloroaniline interacts with the phenyl(2-sulfoethyl)sulfonic group, to introduce the amino group as a functional group. In this case, the amino group is chemically bonded with the surface of the pigment through a group of atoms containing phenyl(2-sulfoethyl) group.

(Copolymer for satismarriages polymer-binding pigment)

Anionic copolymer having anionic property, or cationic copolymer having cationic properties, preferably COI the box is used as the above-described copolymer, consisting of an ionic monomer and a hydrophobic monomer.

Examples of the above anionic copolymer may include a copolymer consisting of a hydrophobic monomer and anionic monomer, and salts thereof. Typical hydrophobic monomers used in the above copolymerization, may include, but are not limited to, complex alkalemia esters of methacrylic acid, such as styrene, vinylnaphthalene or methacrylate, complex alkalemia esters of acrylic acid, such as fenilsalicilat, bezelmaterial, 2-ethoxyethylacetate, Methacrylonitrile, 2-trimethylsilylmethyl, glycidylmethacrylate, p-trimethacrylate, sorelmetal or methyl acrylate, phenylacrylate, benzoylacrylate, Acrylonitrile, 2-trimethylsilylmethylamine, glycidylmethacrylate, p-tolylacetate and corelacelal.

Examples of anionic monomer used in the above copolymerization, may include, but are not limited to, acrylic acid, methacrylic acid and maleic acid.

In one embodiment, the implementation of the copolymer used in the present invention, anionic copolymer consisting of anionic monomer and a hydrophobic monomer consists of at least two monomers, which include any monomer selected from the above hydrophobic monomer is in and at least one monomer selected from the above anionic monomers. This copolymer comprises a block copolymer, a statistical copolymer, graft copolymer and their salts.

Acid value of the anionic copolymer is preferably in the range between 100 and 500. In addition, preferably used anionic copolymer, where the dispersion of the acid number is 20% or less of the average acid number. Setting the acid number of the copolymer in the above range, it is possible to effectively reduce the problem that the hydrophilicity of the surface of the pigment is so high that the water and the solvents contained in the paint remains on the surface of the pigment after printing, thereby causing a slow expression of the marker stability of the ink after printing medium for printing. In addition, you can also effectively reduce another problem, which is that excessively low hydrophilicity of the surface of the pigment prevents a stable dispersion of the pigment in the paint.

Examples of the above salts may include salts of alkali metals such as sodium, lithium or potassium, ammonium salt, alkylamine salt and alkanolamine salt. These salts can be used according to need, one by one or in combination of several types.

Further, in another embodiment, done by the means of copolymer, used in the present invention, will be described cationic copolymer consisting of a cationic monomer and a hydrophobic monomer. Examples of such cationic copolymer may include a copolymer consisting of a hydrophobic monomers and cationic monomers listed below, or their salts. As the hydrophobic monomers may be used monomers listed above.

Examples of the cationic monomer used herein may include allylamine, dimethylaminoethylmethacrylate, diethylaminoethylmethacrylate, tertiary butylmethacrylate, dimethylaminoethylacrylate, diethylaminoethylamine, dimethylaminopropylamine, N-vinylcarbazole, methacrylamide, acrylamide and dimethylacrylamide.

Examples of the cationic copolymer may include a block copolymer, a statistical copolymer and graft copolymer, which is composed of at least two monomers comprising a hydrophobic monomer and a cationic monomer selected from the above monomers, and their salts. In particular, cationic copolymers, having an amine number in the range between 100 and 500, are preferred. In addition, the dispersion of the amine number is preferably 20% or less of the average amine number. Amine number is denoted as the number of mg of KOH, which is equivalent chloridometer the ne acid, required to neutralize 1 g of the sample. Examples of the above salts may include acetic acid, hydrochloric acid and nitric acid. These salts can be used, on demand, individually or in combination of several types.

The weighted average molecular weight (MW) of the above described anionic or cationic copolymer is preferably in the range between 1000 and 20,000, and more preferably in the range between 3000 and 20000. In addition, preferably used such copolymers, where the polydispersity Mw/Mn (average molecular weight Mw/srednekislye molecular weight Mn) of the segment of the cationic copolymer is 3 or less. The content of such cationic copolymer in the ink is preferably in the range of 5% of the mass. up to 40% of the mass. with respect to the total mass of the pigment particles whose surface is modified by means of the copolymer. As for polydispersity copolymer, when the polydispersity is large, this leads to a wide distribution of molecular mass of the copolymer, and the specified properties of the copolymer, based on molecular weight, are barely pronounced. Accordingly, the molecular weight distribution of the copolymer is preferably uniform.

Next, taking the carbon soot in the example described is by way of modification of the pigment by chemical binding of the organic group on the surface of the pigment particles. The methods are not otherwise specifically limited, and can be any commonly used method, if only the methods include the introduction of functional groups on the surface of the pigment particles, the binding of a copolymer consisting of an ionic monomer and a hydrophobic monomer, with these functional groups, so that the copolymer is chemically bound on the surface of the pigment particles. For example, you can use the following methods.

Can be used a method, which includes the introduction of polyethylenimine or similar polymer on the surface of the pigment particles, for example carbon black, and the linking of the copolymer consisting of an ionic monomer and a hydrophobic monomer, and having the amino group, with its end functional group by reaction with participation of the page, or a way of linking a copolymer having amino group and carboxyl group in its molecule, on the surface of the pigment, such as carbon black, by reaction with participation of the page. In addition to these methods, the most typical example is described in the application for international patent WO 01/51566 A1.

In the above-described methods, where the anionic copolymer is chemically bonded on the surface of, for example, particles of carbon soot, are the following 3 stages:

the first stage of joining AMI is openil(2-sulfoethyl)sulfonic group (APSES) to carbon soot by reaction with participation of the page;

the second stage of the accession polyethylenimine or pentachloroaniline (PEHA) to the above carbon soot, processed APSES; and

the third stage of linking a copolymer consisting of a hydrophobic monomer and an ionic monomer having a carboxyl group on the surface of the particles.

In the above second stage phenyl(2-sulfoethyl)sulfonic group chemically bound on the surface of carbon black through the first stage, interacts with the amino group APSES, so that the amino group is introduced onto the surface of carbon black as a functional group which is chemically bound to it. At the third stage, for example, a part of carboxyl groups contained in part ionic monomer copolymer, interacts with the amino groups with the formation of amide linkages, so that the copolymer is introduced on the surface of carbon black through a group of atoms containing phenyl(2-sulfoethyl) group as the remainder of the APSES and the balance PEHA.

In addition, in the above-described method, where the cationic copolymer is chemically bonded, for example, with the surface of the particles of carbon soot, the method includes the following two stages:

the first stage of accession AMINOPHENYL(2-sulfoethyl)sulfonic group (APSES) to carbon soot by reaction with participation of the page; and

the second stage of binding to the polymer, consisting of a hydrophobic monomer and a cationic monomer on the surface of the particles. Through the above first stage, sulfonic group introduced on the surface of carbon black as a functional group chemically related. After that, using the above second stage, for example, a portion of the amino group contained in part ionic monomer copolymer interacts with sulfonic group (nucleophilic substitution), so that the copolymer is introduced on the surface of carbon black through a group of atoms containing phenyl(2-sulfoethyl) group, as a remnant of the APSES.

[Water-soluble sandipanirishi pigment with adsorption resin]

As mentioned above, the pigment dispersible resin, microencapsulating pigment, sandipanirishi pigment, and sandipanirishi polimerazami pigment can be used as the water-insoluble coloring material contained in the water-based paint according to the present invention. In addition to these pigments, can also be used a pigment obtained by adding a water-soluble resin to the pigment. Such water-soluble pigment containing resin, will be described below.

In the present invention may also be used water-soluble samodisciplina pigments with adsorption resin, is received by adding a water-soluble resin to the above-mentioned samodoprinos pigments.

Such water-soluble samodisciplina pigments with adsorption resin can be obtained by adding a water-soluble resin described above satisfacgermany the pigment and mixing, and obtain a mixture. Preferred examples of water-soluble satismarriages pigment with adsorption resin are described below.

The pigment, where the hydrophilic group is chemically bonded on the surface of the pigment particles, either directly or through another group of atoms is an example sandipanirishi pigments used for water-soluble attached to the resin sandipanirishi pigments that can be used in the present invention. For example, it is preferable to use a pigment in which a hydrophilic group introduced on the surface of the pigment particles, represents a group selected from the group consisting of-COOM1, -SO3M1 and-PO3H(M1)2(where M1 represents a group selected from the group consisting of hydrogen atom, alkali metal, ammonium and organic ammonium compounds). Can also preferably be used above another group of atoms, which may represent a group selected from the group consisting of alkalinous group containing 1-12 carbon atoms, substituted or unsubstituted, phenylene the Oh group and a substituted or unsubstituted Neftyanoi group.

In addition, can also preferably be used samodisciplina pigments obtained through the following methods of surface oxidation is a method of oxidizing carbon black with sodium hypochlorite; a method of oxidizing carbon black with ozone water and a method, which includes the impact on carbon black carbon, ozone, and then the impact on her wet oxidation using an oxidizing agent, so as to modify the surface of carbon black. Soluble in alkaline environments polymers preferably adsorbed at a certain ratio to samodoprinos the pigments used for the production of water-soluble satismarriages pigment with adsorption resin. If the surface satismarriages pigment maximally modified by the above-described carboxylation or anything like that, adsorption of soluble in the alkaline environment of the polymer on the pigment particles becomes essentially zero. In contrast, if the surface modification is too small, effects of the modifications are unlikely to be obtained. Accordingly, as a measure of the degree of surface modification surface modification is carried out so that the content of carboxyl groups on the surface of the set is between 0.1 and 0.5 mmol/g

Examples of water-soluble resin which can be used for the production of water-soluble satismarriages pigment with adsorption resin used in the present invention, may include a copolymer consisting of a hydrophobic monomer and an anionic monomer, a copolymer consisting of a hydrophobic monomer, a nonionic monomer and anionic monomer, and their salts. The typical examples of the hydrophobic monomer used herein may include, but are not limited to, complex alkalemia esters of methacrylic acid, such as styrene, vinylnaphthalene or methacrylate, complex alkalemia esters of acrylic acid, such as fenilsalicilat, bezelmaterial, 2-ethoxyethylacetate, Methacrylonitrile, 2-trimethylsilylmethyl, glycidylmethacrylate, p-trimethacrylate, sorelmetal or methyl acrylate, phenylacrylate, benzoylacrylate, Acrylonitrile, 2-trimethylsilylmethylamine, glycidylmethacrylate, p-tolylacetate and corelacelal. Examples of the nonionic monomer may include, but are not limited to, hydroxyethyl(meth)acrylate, polyethylene glycol(meth)acrylate, alkoxymethyl(meth)acrylate and macromer silicone. Examples of anionic monomer used herein may include, but are not limited to, acrylic acid, methacrylic acid and molinological. The here copolymer comprises a block copolymer, a statistical copolymer, graft copolymer and their salts.

Acid number of anionic copolymer used here is preferably in the range between 100 and 500. In addition, preferably used anionic copolymer, where the dispersion of the acid number is 20% or less of the average acid number. Examples of the above salts may include salts of alkali metals such as sodium, lithium or potassium, ammonium salt, alkylamine salt and alkanolamine salt. These salts can be used, on demand, individually or in combination of several types. The weighted average molecular weight (MW) of the above described anionic copolymer is preferably in the range between 1000 and 20,000, and more preferably in the range between 3000 and 20000.

The term "adsorption between pigment and a water-soluble resin used in the present invention for the designation of adsorption caused by van der Waals forces or intermolecular forces. As a means to implement the adsorption is sufficient conventional mixing of the pigment and soluble in the alkaline environment of the polymer, but can be used for dispersing device which applies high shear force, when the pigment adsorbs soluble in alkaline environments the polymer. To determine the degree of adsorption of soluble in the alkaline environment of the polymer satismarriages the pigment is desired evaluation using surface tension. For example, the surface tension is measured while gradually adding the water-soluble resin to 1% of the mass. satismarriages pigment (quantity soluble in the alkaline environment of the polymer depending on γ in the system, containing 1% of the mass. satismarriages pigment: graph A), and the surface tension measured for aqueous solutions of water-soluble resin at various concentrations (the amount of water-soluble resin depending on γ: graph B). Comparing schedule A schedule B to determine the difference of the concentrations of water-soluble resin, in which is obtained a certain surface tension, it is possible to determine the approximate amount of water-soluble resin adsorbed on the pigment.

<Other components>

To preserve the moisture content of the water-based paint of the present invention may contain solid foods to retain moisture, such as urea, urea derivatives, trimethylolpropane or trimethylated, as components of inks other than the above components. Typically, the solids content of products, retaining moisture, such as urea, derivatives of urea Il is trimethylolpropane, in the ink is preferably in the range between 0.1 wt%. and 20.0 wt. -%, and more preferably in the range of 3.0% of the mass. and 10.0% of the mass. in relation to the total weight of the paint.

In addition to this, in addition to the above components, the ink of the present invention may also contain, if necessary, various additives such as a surfactant, a buffer for setting the pH, anti-corrosive agent, an antiseptic agent, a fungicide, an antioxidant, protivovospolitelnye the agent, the agent that promotes evaporation, or chelating agent.

Preferred examples of surfactants used in the present invention may include compounds having any of the following formulas(1)-(4).

Formula (1)

(where R represents an alkyl group, and n is an integer).

Formula (2)

(where R represents an alkyl group, and n is an integer).

Formula (3)

(where R represents a hydrogen atom or alkyl group, and each of m and n is an integer).

Formula (4)

(where each of m and n is an integer).

<<a Method of imaging the BL is reattaching the above paints> >

The method of forming images according to the present invention is a method of inkjet printing for printing on plain paper using black ink and at least one colored water-based paints. The method is characterized by the fact that, as the black paint is water-based paint having the above described structure, and the fact that when forming an image, which consists of an image formed from a black ink, next to the image formed of the color ink image is formed by scanning for applying the black paint, and then scanning for applying the color ink to the area in which is formed the image.

<a Colored dye that is used in conjunction with black paint>

Next will be described a colored dye, used in conjunction with the black paint of the present invention. In the method of forming images according to the present invention can be any known water-based paints used in inkjet printing. Coloring materials for color inks may include water-soluble dyes, and, in particular, water-soluble dye having an anionic group as solubilizers group, are preferred. Color color paint used in the present invention, can match Estulin way to get out of the group, consisting of cyan, Magenta,yellow, red, green, blue and orange.

Water-soluble dyes having anionic group used in the present invention, are not in any way limited, unless they are water-soluble acid dyes, direct dyes or reactive dyes described in color index. In addition, although it is not a dye described using the color index, if the dye has an anionic group such as sulfonic group, he is available. These dyes are used in the range between 1 wt%. and 10 wt. -%, and preferably in the range between 1 wt%. and 5 wt. -%, in relation to the total weight of the paint.

Specific examples of such dyes are the following.

C. I. direct yellow: 8, 11, 12, 27, 28, 33, 39, 44, 50, 58, 85, 86, 87, 88, 98, 100, 110.

C. I. direct red: 2, 4, 9, 11, 20, 23, 24, 31, 39, 46, 62, 75, 79, 80, 83, 89, 95, 197, 201, 218, 220, 224, 225, 226, 227, 228, 230.

C. I. direct blue: 1, 15, 22, 25, 41, 76, 77, 80, 86, 90, 98, 106, 108, 120, 158, 163, 168, 199, 226.

C. I. acid yellow: 1, 3, 7, 11, 17, 23, 25, 29, 36, 38, 40, 42, 44, 76, 98, 99.

C. I. acid red: 6, 8, 9, 13, 14, 18, 26, 27, 32, 35, 42, 51, 52, 80, 83, 87, 89, 92, 94, 106, 114, 115, 133, 134, 145, 158, 198, 249, 265, 289.

C. I. Acid blue: 1, 7, 9, 15, 22, 23, 25, 29, 40, 43, 59, 62, 74, 78, 80, 90, 100, 102, 104, 117, 127, 138, 158, 161.

In addition to the above dyes, paragraphs 1-3, discussed below, the e can be used as coloring materials for color inks, used in the present invention. These coloring materials are preferred, since most of these coloring materials demonstrate excellent resistance when they are put on a medium to be printed.

1. Dyes having a carboxyl group as solubilizers group.

2. Oil-soluble dyes.

3. The pigments.

Oil-soluble dyes are not in any way limited, unless they are described using a color index. In addition, it can represent a new dye, which is not described using the color index, without any specific limitations. Specific examples are described below. These dyes are used in the range between 1 wt%. and 10 wt. -%, and more preferably in the range between 1 wt%. and 5 wt. -%, in relation to the total weight of the paint.

C. I. solvent blue: 33, 38, 42, 45, 53, 65, 67, 70, 104, 114, 115, 135.

C. I. solvent red: 25, 31, 86, 92, 97, 118, 132, 160, 186, 187, 219.

C. I. solvent yellow: 1, 49, 62, 74, 79, 82, 83, 89, 90, 120, 121, 151, 153, 154.

When the coloring material for the color inks used in the present invention, is used, the pigment, the pigment used in the range between 1 wt%. and 20 wt. -%, and more preferably in the range between 2 wt%. and 12% of the mass. in relation to the total weight of the paint. Colored organic pigments, which can the be used in the present invention, are the following.

Examples of the pigment used for the yellow ink may include C. I. Pigment Yellow 1, C. I. Pigment Yellow 2, C. I. Pigment Yellow 3, C. I. Pigment Yellow 13, C. I. Pigment Yellow 16, C. I. Pigment Yellow 74, C. I. Pigment Yellow 83, C. I. Pigment Yellow 128.

Examples of the pigment used for the Magenta ink, and may include C. I. Pigment Red 5, C. I. Pigment Red 7, C. I. Pigment Red 12, C. I. Pigment Red 48 (Ca), C. I. Pigment Red 48 (Mn), C. I. Pigment Red 57 (Ca), C. I. Pigment Red 112, C. I. Pigment Red 122.

Examples of the pigment used for the blue paint, may include C. I. Pigment Blue 1, C. I. Pigment Blue 2, C. I. Pigment Blue 3, C. I. Pigment Blue 15:3, C. I. Pigment Blue 16, C. I. Pigment Blue 22, C. I. Pigment Blue 4, and C. I. Vat Blue 6.

However, the pigments used in the present invention is not limited to this. In addition to the above pigments, of course, can also be used a pigment, a newly produced for the present invention.

In addition, when a pigment is used, it may use any type of dispersant for dispersing the pigment in the paint, unless it is a water-soluble resin. Dispersant having a weighted average molecular weight between 1000 and 30000 is preferred, and a dispersant, having a weighted average molecular weight of between 3000 and 15000, is preferable. Specific examples of such a dispersant may include a block copolymer, random with what OLIMAR, graft copolymer and salts thereof, which consist of at least two monomers (at least one of them is a hydrophilic monomer)selected from the group consisting of styrene and its derivatives, vinylnaphthalene and its derivatives, esters of fatty alcohols with α,β-ethylene unsaturated carboxylic acid, acrylic acid and its derivatives, maleic acid and its derivatives, basis of itaconic acid and its derivatives, fumaric acid derivatives, vinyl acetate, vinylpyrrolidone, acrylamide and their derivatives. In addition, can also preferably be used natural resins such as rosin, shellac or starch. These resins are soluble in an aqueous solution in which the dissolved base, and they represent a resin soluble in alkaline environments. Such water-soluble resin used as a dispersant for pigment, preferably contained in the ink in the range between 0.1 wt%. and 5% of the mass. in relation to the total weight of the paint.

Aqueous medium, preferably used for color inks used in the present invention, is a water or a mixed solvent of water and a water-soluble organic solvent. This water is usually not water containing various ions, but preferably, it is a water podvergnuty the ion exchange (deionized water). Examples of water-soluble organic solvent to be used by mixing with water may include: alkalemia alcohols containing from 1 to 4 carbon atoms, such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol or tert-butyl alcohol; amides, such as dimethylformamide or dimethylacetamide; ketones or ketone alcohols such as acetone or datetoday alcohol; ethers, such as tetrahydrofuran or dioxane; polyalkylene glycols such as polyethylene glycol or polypropyleneglycol; alkalophile, which alkylene groups contain from 2 to 6 carbon atoms, such as ethylene glycol, propylene glycol, butyleneglycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol, hexyleneglycol or diethylene glycol; glycerin; simple lower alkalemia esters of polyhydric alcohols, such as simple onomatology (or ethyl) ether of ethylene glycol, simple methyl (or ethyl) ether of diethylene glycol or a simple onomatology (or ethyl) ether, triethylene glycol; N-methyl-2-pyrrolidone, 2-pyrrolidone and 1,3-dimethyl-2-imidazolidinone. Among these many water-soluble organic solvents, polyhydric alcohols such as dietilovyi alcohol, and simple lower alkalemia esters of polyhydric alcohols, such as simple monomethyl the new (or ethyl) ether, triethylene glycol, are preferred.

The above-described water-soluble organic solvent contained in the color ink, typically within 3% of the mass. up to 50 wt. -%, and preferably in the range of 3% of the mass. up to 40% of the mass. in relation to the total weight of the paint. In addition, the water here used, is contained in the ink within 10% of the mass. up to 90 wt. -%, and preferably in the range from 30 wt%. up to 80% of the mass. in relation to the total weight of the paint. In addition to colored ink used in the present invention, have the desired numeric value required physical properties, it may contain, according to need, various additives such as surfactant, protivovspenivayushchie agent or antiseptic agent, as well as the above components.

Black and color ink used in the present invention, containing the above described components, preferably have a good vswobozdaemoe of heads for inkjet printing. Accordingly, from the point of view of vswobozdaemoe of heads for inkjet printing, the above inks preferably have properties such as viscosity from 1 to 15 MPa/s and a surface tension of 25 mn/m or more, and more preferably, properties such as viscosity from 1 to 5 MPa/s and a surface tension of from 25 to 50 mn/m In the case of the combined use of cannonbase and color paint surface tension of the color ink is preferably lower than black paint. More specifically, the surface tension of the black ink is in the range between 35 and 50 mn/m, and the surface tension of the color ink is in the range between 25 and 35 mn/m

<a Method of imaging>

The method of forming images according to the present invention will be described using the following specific examples. The method of forming images according to the present invention differs in that it uses water-based paint according to the present invention having the above structure, as the black paint, and for forming an image in which the image is formed using a black ink and an image formed using a colored paint, are close by, this is the first expansion to attach the black paint, and then scan to attach color paint in the area in which the black image is already formed. Specific tools will be described below.

Fig depicts an example of the printhead, which is used for a method of forming images according to the present invention. As shown in Fig, the print head has a line outlet for ejection of the black ink (Bk) and line outlet for the discharge of each of the three color inks, cyan (C), Magenta (M) and yellow (Y). It is when a color image is formed by a method of forming images according to the present invention, preferred is the use of a print head in which a line of holes for ejection of the black ink and the line of holes to eject color inks do not overlap along the direction of potasinski (typing paper). Accordingly, for forming an image using a printhead shown on Fig, for example, is formed when only the black image, use the entire area of the black line of holes, and when forming a color image, using both black and color inks, it is preferable to use part of the black line of the holes shown on Fig, and parts b of lines of holes for C, M and Y. the Case of image formation, consisting of both black ink and color inks will be described below in more detail, using Fig.

On Fig, first, using a portion of the line of holes for the release of black ink printhead expands in the horizontal direction (main scan direction), so that a black image is formed on the medium to be printed, such as ordinary paper, by one-pass printing. Then Wednesday for printing moves in the vertical direction (the direction of potasinski shown Fig at a distance. At the next stage when using part b of each line of holes glazbeni paints color image is formed by one-pass printing, in the forward sweep direction, the region in which the black image is formed with the openings of a part. At this time, the holes for the release of black paint in the part a at the same time form another black image in the next field. By repeating this operation to create an image consisting of a black ink and color inks.

Fig.9 depicts another example of a printhead, which is used for a method of forming images according to the present invention. As in the case of Fig, figure 9 holes for black paint in part a are also used for forming a black image, and the part b corresponding to the entire area of each of the lines of holes to release the colored inks used for C, M and Y, and thus, the image consisting of a black ink and color inks, is formed in the same manner as described for Fig.

Figure 10 depicts another example of a printhead, which can be used in the method of forming images according to the present invention. As in the case of Fig, figure 10 part a hole to release the black paint is also used for forming a black image, and the part b corresponding to all the holes for each of the color inks C, M and Y, is used to form a color image, and thus the time image formation, consisting of both black ink and color inks.

In the print head depicted in figure 10, part a line of holes for the release of black paint and part b of lines of holes for releasing colored paints are separated by a distance corresponding to the distance a' single step transfer paper, as shown in figure 10. Accordingly, the print head with such a structure generates a difference in time, which corresponds to the time required for one reciprocating scan to print, from the moment when the black image is formed, until the moment when forming a color image. Accordingly, we can say that the print head depicted in figure 10, has a structure that is more favorable than that of the printhead shown in Fig.9, from the viewpoint of bleeding between the black ink and colored inks.

11 depicts another example of a printhead, which is used in the method of forming images according to the present invention. As shown in the drawing, this printhead is configured in such a way that lines the exhaust hole for the black ink and color inks are aligned in the direction of entry of the paper. In this case, also, a color image is formed after forming the black is th image, in accordance with the input paper.

Fig depicts another example of a printhead, which is used in the method of forming images according to the present invention. Printhead shown on Fig, is configured in such a way that for each color ink are provided on two lines of the outlet, that is, cyan (C1, C2), Magenta (M1, M2), and yellow (Y1, Y2), with the symmetric location in the main scan direction, so that the order of contact with the paper color inks becomes the same as when the scan forward and scan backward. As a result, it becomes possible to print in both directions, even if image formation, consisting of both black ink and color inks. In this case, using a black paint first black image is formed forward from the main scan direction of the printhead. After this, the environment for printing is transferred to the distance a. Then using part b of lines of holes for releasing colored paints the cylinder and forms a color image by one-pass printing in the sweep time ago, in the main scan direction, on the area where the black image formed by holes in a part. At this time, the holes for the black paint formiruemogo black image to the next area. By repeating this operation, image formation, consisting of both black ink and color inks.

Printhead for printing in two directions, shown on Fig may also be configured in such a way that a black nozzle, and the color nozzles are arranged to create the interval of one scan between the formation of the black image and forming a color image as described above, it would be more advantageous for the impact against the spread (see Fig). The method of image formation according to the present invention described above, but the shape of the printhead used for the method according to the present invention are not limited to those depicted in Fig-13.

[Printing method, the host print cartridge and device for printing]

Next will be described an example of a device for inkjet printing, is preferably used in the present invention. First of all, figures 1 and 2 show an example of the structure of the head, which is the main part of the device for inkjet printers that use thermal energy. Figure 1 is a view of the head 13 in the section along the channel for paint, and figure 2 is a view in section along the line A-B of figure 1. The head 13 is formed by connecting glass, ceramic, silicon or plastic and the like, which provides for, p is at least one path 14 for the flow of paint, with the element 15, which generates heat (not limited to that shown in the drawings). Element 15, which generates heat, is composed of a protective film 16 made of silicon oxide, silicon nitride, silicon carbide or the like, aluminum electrodes 17-1 and 17-2 made of aluminum, gold, aluminum-copper or the like, the heat generating layer 18, forming a resistance made of HfB2, TaN, TaAl, and the like, a heat accumulating layer 19 made of thermally oxidized silicon, oxidized aluminum, and the like, and a substrate 20 made of silicon, aluminum, aluminum nitride, and the like, which is excellent for releasing heat.

Upon application of an electrical signal in the form of a pulse to the electrodes 17-1 and 17-2 in the area shown as "n", quickly generates heat with the formation of a bubble in the ink 21 in contact with this region. The meniscus 23 of the ink is ejected under the action of pressure of the bubble generated thereby, and ejected from the holes 22 on Wednesday 25 for printing (e.g., paper) in the form of droplets 24 colors, attaching itself to the environment 25 for printing. Figure 3 schematically illustrates a print head having a number of nozzles, such as that depicted in figure 1. This joint is the ay clutch glass plate 27, having a number of paths 26 for the flow, with a head 28 that generates heat, such as that depicted in figure 1.

Figure 4 illustrates an example device for inkjet printing, which includes this head, as described above. In figure 4, the knife 61 is a doctor element, one end of which is a fixed region, supported by the element holding the knife on the tray. The knife 61 is provided in a position near to the area in which the print head 65, and, in this aspect, is held in such a form that it is on the path of the print head 65. Number 62 indicates a cap for producing holes of the print head 65, the cap installed in the original position next to the knife 61 is moved in the direction perpendicular to the direction of movement of the print head 65, and overlaps the hole to eject the ink when it touches it. The number 63 denotes an ink absorber provided near the knife 61, which is supported in the path of movement of the head 65 to print in serving the form, like the knife 61. Above the knife 61, the cap 62 and the absorber 63 paints are the node 64 eject ejection of a knife blade 61 and the absorber 63 paints are used for the removal of moisture and dust into the hole to eject the ink.

Room 65 means the printhead. Head with the holding means of generating energy to eject the ink and performs printing by means of ink ejection in the direction of the medium to be printed, opposite the hole to eject the ink. 66 means carrying the carriage to the print head 65, which is designed to move. The carriage 66 is engaged with the round guide 67 slidable, and the part of the carriage 66 is connected by a belt 69 (not shown)driven under the action of actuator 68. Thus, the carriage 66 can move along the circular guide shaft 67, and the print head 65 can be moved in the field of printing and in the field next to it.

Room 51 means of the feed medium to print the section intended for the insertion of the medium to be printed, and the number 52 denotes a roller for feeding paper, driven by a drive, not shown in the figure. With this arrangement, the medium for printing is put into position opposite the openings of the ink ejection print head 65 and transferred to the output section of the paper, provided with a roller 53 to move the paper, as is the printing. In a device for printing images in accordance with this aspect of the present invention, the print head moves forward and backward along the direction perpendicular to the direction of the transfer medium to be printed, and on the way forward and back head can inflict on the environment for printing at least one color of black ink and color ink. Data processing for p is chati can be carried out using conventional technology, associated with printing in two directions.

With the above arrangement, when the print head returns to its original position after printing, the cap 62 of the node 64 eject ejection steps back from the path of movement of the print head, but the knife 61 is on travel. As a result, the holes to release the ink print head 65 is cleared. As a result, the slice outlet openings of the print head 65 is cleared during this move. The above movement of the print head 65 to its original position occurs not only when it is finished printing, or to retrieve ejection, but also when the print head 65 is moved to the area to print to print, that is, it is moved to its original position near the area to print at set intervals of time during printing, so that clear cut openings for the discharge of using this move.

Figure 5 depicts one example of an ink cartridge for storing ink, intended for the introduction of ink into the printhead through the element for the introduction of paint, such as a tube. In the drawing, the number 40 means the element constituting the cartridge 45 for paint, detail for storing ink, such as a bag of paint, the tip of which is provided with a rubber stopper 42. Paint in isacke 40 for dye may be injected into the printhead through the insertion of a needle (not shown) in tube 42. Number 44 denotes an ink absorber for receiving excess ink. In the case of items to store paint its surface in contact with the paint preferably made of polyolefin, in particular polyethylene.

Device for inkjet printing used in the present invention is not limited to such a device, as described above, in which the head and the ink cartridge are provided separately. For this reason, may also preferably be used a device in which these elements are formed as a single unit, as shown in Fig.6. Figure 6, number 70 indicates a node print, including the item for storage of a paint containing a paint, for example, an element for absorbing the ink in it. The paint contained in the element to absorb the ink is ejected in the form of ink droplets from a head 71 having a number of holes. As the material for the element absorbing dye may preferably be used in the polyurethane. 72 indicates a passage for the air, for communication of the internal space of the node 70 printing with the atmosphere. This node 70 printing may be used instead of the print head 65 shown in figure 4, and a removable manner be mounted on the carriage 66.

An example of the configuration of the printhead that uses mechanical energy is a pulse head alastruey print containing: forming a nozzle substrate having multiple nozzles, generating pressure element consisting of a piezoelectric material and material, conductive, located opposite the nozzles, and ink filling the peripheral portion of the element generating the pressure at which the element generating the pressure, is displaced by application of voltage, in order to dispose of ink droplets from the nozzle.

7, the path 80 to the flow of the paint is made of a photosensitive resin; a plate with holes 81 is made of metal, such as stainless steel and Nickel; a hole 85 for discharge is formed by making holes in the plate 81 with holes through electrobraid or processing of punching; a vibration plate 82 is made of a metal film such as stainless steel, Nickel and titanium, and a film of elastomeric resin; and a piezoelectric element 83 is made of a dielectric material such as barium titanate and PZT (based ceramic titanate and lead zirconate, lead). The print head of the above system works as follows: when the piezoelectric element 83 is fed pulse voltage is generated elastic tension, the energy of which deforms the vibration plate connected to piezoelect the historical element 83, with application to the paint pressure gradient in the vertical direction, on the path 80 of the flow of paint and a drop of paint (not shown) is released from the hole 85 of the plate 81 with holes for printing. This printhead is part of the device for printing, such as that depicted in figure 4. The detailed action of the machine for printing may be the same as discussed above. 7 depicts an example of the structure of the printhead, which is a main part of the device for printing.

The head consists of channel 80 for paint connected with camera for paint (not shown), the plate 81 with holes to release a desired amount of drops of paint, the aperture 82 for the direct application of pressure to the ink, a piezoelectric element 83, which is connected with the diaphragm 82 and moves under the action of the signal electronics, and a substrate 84 for supporting and fixing plate 81 with the holes in the diaphragm 82, or the like.

7, the channel 80 for paint is made of photosensitive resin or the like, and the node 85 for release is formed by a plate 81 with holes, made of metal, such as stainless steel or Nickel, by drilling or the like, such as electrobraid or stamping. Dia is Rahma 82 is made of a metal film, such as stainless steel, Nickel or titanium, and a film of elastomeric resin. The piezoelectric element 83 is made of a dielectric material such as barium titanate or PZT. Printhead with the above structure sends a voltage pulse to the piezoelectric element 83, giving him the opportunity to generate a deforming stress. Then the generated energy deforms the diaphragm, connected to the piezoelectric element 83, thereby creating a vertical pressure gradient in the ink contained in the channel 80 for paint, so that drops of ink (not shown) are ejected from the exhaust holes 85 in the plate 81 with holes, so as to carry out printing. This printhead is part of the device for inkjet printing, such as that depicted in figure 4, and is used. The specific operation of the device for inkjet printing are the same as described above.

Examples

The present invention will be described more specifically with reference to the following examples and comparative examples. However, the present invention is not limited to the following further examples, unless it is within the scope of the present invention. It should be noted that "part" and "%" are given in this description referred the Yu to mass, if you don't specify otherwise.

(Preparation of solution 1 dispersion pigment)

Mix ten parts of carbon black having a specific surface area of 210 m2/g and oil absorption DBP (dibutyl phthalate) 74 ml/100 g, 20 parts of 10% styrene-acrylic acid (acid value: 200, average molecular weight: 10000) in water, neutralized with sodium hydroxide, and 70 parts of water, subjected to ion exchange. The mixture was dispersed for 1 hour using a sand eraser. Thereafter, coarse particles are removed by separation in a centrifuge, and the supernatant is filtered under pressure using a microfilter with a pore size of 3.0 μm (manufactured by Fuji Photo Film Co., Ltd.), obtaining solution of 1 dispersion of a pigment dispersed with the resin. The resulting solution was 1 of the pigment dispersion has a solids content of products 10%, pH of 10.0 and an average particle size of 120 nm.

(Preparation of solution 2 dispersion pigment)

Black carbon (10 g)having a specific surface area of 230 m2/g and oil absorption DBP of 70 ml/100 g to 3.41 g of p-amino-N-benzoic acid and 72 grams of water are fully mixed, and thereto is added dropwise of 1.62 g of nitric acid and stirred at 70°C. After a few minutes, to the mixture add a solution of 1.07 g of sodium nitrite in 5 g of water followed by additional paramesh the requirement for 1 hour. The resulting slurry was filtered through Toyo filter No. 2 (Advantis), and the pigment particles are completely washed with water, and then dried in an oven at 90°C. thereafter, to the pigment, water is added to obtain an aqueous solution of pigment with a pigment concentration of 10%. Thus obtained solution of 2 of the pigment dispersion contains an anionic charged samodoprinos carbon black having a hydrophilic group associated with the surfaces of the pigment particles by a phenyl group.

The density of ionic groups thus obtained satisfacgermany carbon black measured by using the following further method is 1.3 µmol/m2. The concentration of sodium ions is measured using an ion concentration meter (DKK) and the obtained value is converted into the density of ionic groups. Using the above method are the solution of 2 dispersion pigment in which sandipanirishi carbon is obtained by introducing a group-C6H4-COONa to the surface of carbon black.

(Preparation of dispersion solution of 3 pigment)

Black carbon (500 g)having a specific surface area of 220 m2/g and oil absorption DBP 112 ml/100 g, 45 g AMINOPHENYL(2-sulfoethyl)sulfone (APSES) and 900 g of distilled water are placed in a reactor and maintaining the temperature at 55°C the mixture was stirred at 300 rpm for 20 minutes. Then added dropwise to a mixture of 40 g of 25% sodium nitrite in 15 minutes and then there was added 50 g of distilled water. After that, maintaining the temperature at 60°C, carry out reaction for 2 hours. After that, select the reaction product, diluting at the same time with distilled water to a solid content of products 15%. Then carry out the separation in the centrifuge and purifying treatment to remove impurities. In the thus obtained solution of the dispersion of the functional groups mentioned above APSES associated with carbon soot. This dispersion is referred to as A1.

Subsequently, to determine the molar amount of functional groups associated with carbon black in the solution A1 dispersion measure Na ions in solution dispersion using sodium electrode probe. The obtained value is converted into the number of groups per particle of the carbon black, in order to obtain the molar amount of functional groups associated with carbon black. After that, the previously prepared solution A1 dispersion with a solids content of products 15% is added dropwise into the solution pentachloroaniline (PEHA). During this process the solution PEHA intensively stirred while maintaining it at room temperature, and add dropwise a solution of A1 dispersion for 1 hour. During this the process to establish the concentration of PEHA, component from 1 to 10-fold from a previously defined molar amount of Na ions, and set the amount of solution PEHA, equivalent to the amount of solution A1 dispersion. The resulting mixture is stirred for 18-48 hours, and then carry out a cleaning treatment for removing impurities. Finally, get the dispersion of carbon black, to which is added pentamethylenebis (PEHA), when the content of solids of 10%. This dispersion is referred to as B1.

After that prepare a resin solution of a copolymer of styrene and acrylic acid by weighing 190 g of the resin of styrene and acrylic acid having an average molecular weight of 8,000, an acid number of 140 and a polydispersity Mw/Mn (average molecular weight Mw/srednekislye molecular weight Mn) of 1.5, which adds 1800 g of distilled water and NaOH needed to neutralize the resin, and stirred. Thereafter, under stirring is added dropwise to the above aqueous solution of the resin of styrene and acrylic acid, 500 g of the previously prepared solution B1 dispersion with a content of solids of 10%. After that, the mixture of B1 and an aqueous solution of the resin of styrene-acrylic acid transferred in the evaporator Cup of Pyrex (trade name), and then heat it at 150°C for 15 hours to evaporate. The dried material, polucen the th after evaporation, cool to room temperature.

Then, using the dispersing device, the dried material obtained after evaporation, was dispersed in distilled water, setting the pH to 9.0 with NaOH. While continuing the stirring, to the solution was added a 1.0 M NaOH to bring the pH to 10-11. A solution of 3 dispersion of the pigment obtained after vysalivaniya and purification of the above solution and remove large particles. Solution 3 the pigment dispersion has a solids content of products 10%, pH 10.1 and the average particle size of 130 nm. There follows a scheme of synthesis satismarriages pigment with linking polymer in which the organic group is chemically bound to the surface of the particles of carbon soot, contained in the above solution of 3 dispersion of pigment.

The scheme of synthesis of the modified pigment

[Method of determining whether a used water-soluble organic solvent is a good solvent or poor solvent]

To determine whether your water-soluble organic solvent is a good solvent or poor solvent for the pigment or pigment and dispersant contained in the above dispersion of the pigment, carry out the following experiment. First, using each of the specified the above solutions 1-3 pigment dispersion with a content of solids of 10% to prepare the test solution dispersion to determine good or bad solvent with the following structure.

(The ratio of mixing for dispersion to determine good or bad solvent)

Each solution of the dispersion of the pigment in the solid content of the products 10%: 50 pieces.

Each water-soluble organic solvent described in table 1: 50 parts.

(Definition)

10 g prepared above researched solution to determine the good or bad of an organic solvent is placed in a jar for samples, equipped with a transparent glass lid. Once the jar is covered with a glass lid, solution, mix well and leave to stand in an oven at 60°C for 48 hours. After that, the dispersion is removed from the furnace, to be used as a sample for measurement. The particle size of water-insoluble coloring material contained in the solution, measured using the analyzer of size of particles in concentrated solutions (product name: FPAR-1000; manufactured Otsuka Electronics). The obtained value is designated as the particle size of the undiluted solution (particle size, measured without dilution solution) for dispersion is used to determine whether an organic solvent, a good solvent or a poor solvent after storage at 60°C for 48 hours. Separately prepare the reference dispersion pigment is eating the same way, as the preparation of the investigated solutions, dispersions, except that the water-soluble organic solvent is replaced with the same amount of water. The particle size of water-insoluble coloring material in the undiluted reference solution is measured by using the analyzer of size of particles in concentrated solutions, but without storage solution when heated. The obtained particle size analyzed undiluted solution is compared with the particle size of the reference solution of the dispersion. When the first particle size is larger than the last, the solvent is defined as a poor solvent. In contrast, when the first particle size is equal to or smaller than the last, it is defined as a good solvent.

[Method of measuring the value of Ka for each water-soluble organic solvent]

First, to facilitate the measurement values of Ka for each water-soluble organic solvent to prepare a solution of 0.5% of the dye in water of the following composition.

Water-soluble dye C. I. direct blue 1990.5 parts
Clean water99,5 part

Then, using the above 0.5% rest the R dye, prepare colored aqueous solutions respectively containing 20% of water-soluble organic solvents, for measurements, with the following composition:

Above 0.5% aqueous solution of dye80 parts
Each of the water-soluble organic solvents described in table 120 pieces

Using prepared above colored aqueous solution containing 20% of water-soluble organic solvent, the Ka value determined by using method Bristow, using Dynamic Permeability Tester's (product name), manufactured Toyo Seiki Seisaku-sho, Ltd.

<<Definition and the determination results>>

Table 1 shows the results obtained by determining whether or not each measured above water-soluble organic solvents, suitable for paint, good solvent or poor solvent for each of the solutions 1-3 dispersion of pigments, and the results of measurements of the values of Ka for each of the 20% aqueous solution containing water-soluble organic solvent. In table 1 "poliatilenglikole derivative" means a derivative of the following structure having a molecular weight of priblisitelno:

where each of n and m is a number ranging from 5 to 20.

Table 1
The results determine whether each water-soluble organic solvent is a good solvent or a poor solvent or not, and the values of Ka
Water-soluble organic solventWater-insoluble coloring materialThe value of Ka for 20% aqueous solution
The dispersion of pigment 1The pigment dispersion 2The pigment dispersion 3
GlycerinOOO0,13
Ethylene glycolOOO0,09
Diethylene glycolXXX0,14
TrimethylolpropaneOO0,19
Polyethylene glycol 600XXX0,17
Poliatilenglikole derivedXXX0,18
2-pyrrolidoneXOX0,19

In the table, O: good solvent, X: poor solvent

<Examples 1-5>

Mix the above-described water-soluble organic solvents, solutions 1-3 dispersion of pigments and components described in table 2, and stirred for dissolution or dispersion. After that, the mixture is filtered under pressure using a microfilter with a pore size of 3.0 μm (manufactured by Fuji Photo Film Co., Ltd.), in order to prepare inks of examples 1-5. Paints prepared in such a way that when the total amount (% wt.) good solvent in the paint is designated as A, and the total amount (% wt.) the poor solvent in the paint is designated as B, the ratio of A to B is in the range of interest is 10:5 or more and 10:30 or less and when the values of Ka of many water-soluble organic solvents is determined using the method of Bristow and the obtained values are compared with each other, water-soluble organic solvent having the highest value of Ka, is a poor solvent.

Table 2
The composition of the paints of examples 1-5
Composition(% wt.)
App.1PRPRPRPR
Water-insoluble coloring materialThe dispersion of pigment 150----
The pigment dispersion 2-50-50-
The pigment dispersion 3-- 50-50
Water-soluble organic solventGood solventGlycerin55575
Ethylene glycol5----
Trimethylolpropane-----
Poor solventDiethylene glycol--533
Polyethylene glycol 6001015106-
Poliatilenglikole derived-- --10
SurfactantProduct add acetylenics and EO (*)0,10,10,10,10,1
Clean water29,929,929,933,931,9
(*) Product name: Acetylenol EH, is made by Kawaken Fine Chemicals Co., Ltd.

<Test paint of example 4>

Assuming that the composition obtained above paint of example 4 is unknown, determine whether the paint object of the present invention or not, using the following method. Using this verification method, even if the paint composition is unknown, you can easily confirm whether the paint object of the present invention or not.

The type and quantity of organic solvents contained in the paint, can be identified using, for example, GC/MS (product name: TRACE DSQ, is ThermoQuest). More specifically, for example, a sample obtained by razvalini is 1 g of the dye of example 4 with methanol, analyze using the above GC/MS. As a result, first of all, confirm the presence of glycerol, diethylene glycol and polyethylene glycol 600 in the sample. You must then determine whether these three types of solvents are good solvents and poor solvents. In the above-described method of determining whether a solvent is a good solvent or a poor solvent, to prepare a dispersion solution in which water-insoluble coloring material dispersed in the solvent and water. However, for the preparation of the dispersion of paint you need to remove the water-insoluble coloring material or dispersant from the paint. However, in this case, the water-insoluble coloring material or dispersant could be damaged during the extraction process.

Thus, the authors of the present invention conducted various studies to find a method, which includes the direct use of the ink of example 4 to determine whether the solvent contained in it, a good solvent or poor solvent, and provides the determination results that are consistent with the results of the above detection method. As a result, the authors of the present invention found that it is preferable for the following method of test. First goth is including the following three types of dilutions of the paint by adding each of the above three types of water-soluble organic solvents, which should be determined, in equal amount, to 100 parts of the dye of example 4, and perform the determination using these solutions. In other words, prepare 3 types of dilutions of the ink compositions shown in table 3 (shown in table 3 as examples of validation 1-3), each of which contains approximately 50 wt%. water-soluble organic solvent, as a target for detection. Then, these solutions are allowed to stand at 60°C for 48 hours, and the particle size of water-insoluble coloring material contained in them, and then measured using the analyzer of size of particles in concentrated solutions (product name: FPAR-1000; manufactured Otsuka Electronics Co., Ltd.). On the other hand, the paint, which is not subjected to storage under heating, also measured from the point of view of the particle size of water-insoluble coloring material contained in it. The definition of a good solvent or poor solvent is carried out in accordance with the criteria that the measured value of the particle size after storage during heating compared with each other, with the value for the paint without storage, and when the first particle size is larger than the last particle size, it is defined as a poor solvent, and when the first particle size is equal to or less than posledniye particles, it is defined as a good solvent. In table 3, shown below, viscosity (CP) of used solvents is also shown as a condition of measurement for the size of the particles in the undiluted solution. The viscosity is measured with a type E viscometer (VISCONIC type ED is Tokyo Keiki Co., Ltd.)

Table 3
The composition of the samples to determine a good solvent or a poor solvent with respect to the solvent used for the ink of example 4
The paint of example 4The composition of the studied examples [part]
123
The paint of example 4-100100100
Glycerin-100--
Diethylene glycol--100 -
Polyethylene glycol 600---100
Viscosity [SP]2,3the 10.18,733,9

Table 4 shows the particle size of the pigment in undiluted paint of example 4 without storage and the size of the pigment particles of each of the undiluted solution of the verification examples 1-3 after storage under heating at 60°C for 48 hours, which are measured as described above. By comparing the measured values, determines that, when the measured values of the particle size in each of the examples of validation are larger than the ink of example 4, it is defined as a poor solvent, and when the measured value of the particle size in each of the examples of the test is equal to or smaller than the ink of example 4, it is defined as a good solvent.

Table 4
The research results of the solvents contained in the paint of example 4
The sample for measurementsThe size of particles in undiluted R is the target [nm] Definition
Study example 1 (after storage when heated)71,2O
The analyzed sample 2 (after storage when heated)167,8X
The analyzed example 3 (after storage when heated)160,7X
The paint of example 4 (without storage)71,9-

Conditions for storage during heating: 60°C, 41 hours.

O: good solvent, X: poor solvent.

As shown in table 4, the results of the method of definition of a good solvent or poor solvent with the use of check samples obtained by diluting the prepared paint can confirm that glycerin (used in the validation sample 1) is a good solvent, and diethylene glycol (used in example 2) and polyethylene glycol 600 (used in the validation sample 3) are poor solvents, and using the detection method shown in table 1, that is, using the above two different types of detection methods get the same results. The COO is responsible, confirmed that the method of using real paint to determine whether it uses the solvent is a good solvent or poor solvent for the contained coloring material is effective. For this reason, the above method to determine is used, the solvent is a good solvent or poor solvent, by using a sample obtained by diluting the paint, can also be effectively used in the present invention.

<Comparative examples 1-17>

(Preparation of paints)

Mix the above-described water-soluble organic solvents, solutions 1-3 dispersion of pigments, and the components shown in tables 5-1 - 5-3. The resulting mixture was fully stirred for dissolution or dispersion, and then it is subjected to filtration under pressure using a microfilter with a pore size of 3.0 μm (manufactured by Fuji Photo Film Co., Ltd.), in order to obtain the ink of comparative examples 1-17.

Table 5-1
The composition of the inks of comparative examples 1-6
The composition of the inks of comparative the reamers (% wt.)
123456
Water-insoluble coloring materialThe dispersion of pigment 1505050---
The pigment dispersion 2---505050
The pigment dispersion 3------
Water-soluble organic solventGood solventGlycerin5-55-5
Ethylene glycol --5--5
Trimethylolpropane7-57-5
Poor solventDiethylene glycol------
Polyethylene glycol 6001015-1015-
Poliatilenglikole derived------
SurfactantProduct add acetylenics and EO (*)0,10,10,10,10,1
Clean water27,934,934,927,934,934,9
(*) Product name: Acetylenol EH, is made by Kawaken Fine Chemicals Co.,Ltd.

Table 5-2
The composition of the inks of comparative examples 7-12
The composition of the inks of comparative examples (wt. -%)
789101112
Water-insoluble coloring materialThe dispersion of pigment 1----50-
The pigment dispersion 2 -----50
The pigment dispersion 350505050--
Water-soluble organic solventGood solventGlycerin5-5-33
Ethylene glycol--5---
Trimethylolpropane7-5---
Poor solventDiethylene glycol-- ----
Polyethylene glycol 6001015----
Poliatilenglikole derived----1515
SurfactantProduct add acetylenics and EO (*)0,10,10,10,10,10,1
Clean water27,934,934,939,931,931,9
(*) Product name: Acetylenol EH, is made by Kawaken Fine Chemicals Co.,Ltd.

Table -3
The composition of the inks of comparative examples 13 to 17
The composition of the inks of comparative examples (wt. -%)
1314151617
Water-insoluble coloring materialThe dispersion of pigment 1-50---
The pigment dispersion 2--50-50
The pigment dispersion 350--50-
Water-soluble organic solventGood solventGlycerin355 515
Ethylene glycol-888-
Trimethylolpropane-----
Poor solventDiethylene glycol-----
Polyethylene glycol 600-555-
Poliatilenglikole derived15----
SurfactantProduct add acetylenics and EO (*)0,10,10,10,1 0,1
Clean water31,931,931,931,934,9
(*) Product name: Acetylenol EH, is made by Kawaken Fine Chemicals Co., Ltd.

<Evaluation of image properties>

The paints of examples 1-5 and comparative examples 1-17 evaluate from the point of view of the properties described below, using a modified device for inkjet printing HEL-700 (manufactured by Canon Inc.), with pulsed head for multi-channel print, which applies thermal energy to the ink in response to a print signal, in order to throw the paint. The results of the assessments for the examples shown in table 6 and the results for comparative examples shown in table 7.

1. The print density

Using the above dye and the above device for inkjet printing, signs, occupying a solid area of 2 cm x 2 cm, print on plain paper copier A-E described below. A day after printing, measure the print density of a solid area of 2 cm × 2 cm Mode printer driver is the default mode. Setting default mode is shown below. The amount of ink ejected per Astronautics paint, is in the range of 30 ng ± 10%.

• Paper type: plain paper.

• Print quality: standard.

• Setting colors: automatic.

The print density obtained by the above measurement is estimated in accordance with the following criteria.

O: Average print density for 5 types of paper is 1.4 or higher, and the print density of the paper with the lowest print density is 1.25 or higher.

Δ: the Average print density for 5 types of paper is 1.4 or higher, and the print density of the paper with the lowest print density is less than 1.25.

X: the Average print density for 5 types of paper is less than 1.4.

In the research mentioned above, print uses the following types of paper for copier:

A: PPC paper NSK, manufactured by Canon Inc.,

B: paper PPC NDK, manufactured by Canon Inc.,

C: PPC paper 4024, manufactured by Fuji Xerox Co., Ltd.,

D: paper PPC Prober Bond, produced by Fox River Paper Co., and

E: paper Canon PPC is Die Neusiedler AG.

2. The print density when printing with a small amount of paint

The print density with a smaller amount of ink is measured in the same way as above, except that the ejected amount of ink per one dot is set within 24 ng ± 10%. The resulting print density estimate in accordance with the same what ritoniemi, as above.

<Evaluation of stability during storage>

Each of the inks of examples 1-5 and comparative examples 1-17 is placed in a thick-walled container, and the container sealed. Then the container is placed in an oven at 60°C. After two weeks, the capacity of the extract, and then see the condition of the paint. The storage stability is evaluated according to the criteria described below. The evaluation results obtained for the inks of examples shown in table 6 and the results for the inks of the comparative examples shown in table 7.

O: pigments contained in the paint, are dispersed stably and uniformly.

X: Paint becomes a gel, or its upper part becomes transparent, or it is clearly sagaseta.

Table 6
Evaluation examples
The print densityThe storage stability
Normal ejection of inkLow emission paint
Example 1OOO
Example 2OOO
Example 3OOO
Example 4OOO
Example 5OOO

Table 7
The evaluation results of comparative examples
The print densityThe storage stability
Normal ejection of inkLow emission paint
Comparative Example 1XXO
Comparative example 2OAX
Comparative example 3X XO
Comparative example 4XXO
Comparative example 5OAO
Comparative example 6XXO
Comparative example 7XXO
Comparative example 8OAX
Comparative example 9XXO

Comparative example 10OAX
Comparative example 11OAX
Comparative example 12OA O
Comparative example 13AboutAX
Comparative example 14XXO
Comparative example 15XXO
Comparative example 16XXO
Comparative example 17XXO

<Measurement getting paint on plain paper>

(Preparation of coating of example and comparative examples, measurements of getting paint on paper)

Use a solution of 2-dispersion pigment and mix it with the components shown in table 8. The mixture was fully stirred to dissolution or dispersion and subjecting it to filtration under pressure using a microfilter with a pore size of 3.0 μm (manufactured by Fuji Photo Film Co., Ltd.), in order to get each of the inks of example 6 and comparative examples 18-20. In the preparation of these dyes to measure the penetration of ink on paper in sulinowo observations of the distribution of ink after its attachment on medium for printing using a water-soluble dye C. I. direct blue 199. The surface tension of each of these paints are also shown in table 8. The surface tension measured by the tension meter CBVP-A3, manufactured by Kyowa Interface Science Co., Ltd., at the measurement temperature of 25.0 ± 0.5°C, using a platinum plate 10 mm x 24 mm

Table 8
The ink composition of example and comparative examples to measure the penetration of ink on paper
Composition (% wt.)
PREUR. other 18EUR. other 19EUR. other 20
Water-insoluble coloring materialThe dispersion of pigment 1----
The pigment dispersion 250505050
The pigment dispersion 3-- --
Water-soluble organic solventGood solventGlycerin7,5-15-
Ethylene glycol----
Trimethylolpropane---7,5
Poor solventDiethylene glycol----
Polyethylene glycol 6007,515-7,5
Poliatilenglikole derived----
SurfactantThe product add the value of acetylenics and EO (*) 0,10,10,10,1
Water-soluble dyeC. I. direct blue 1990,50,50,50,5
Clean water34,434,434,434,4
Surface tension (mn/m)39,539,639,440,1
(*) Product name: Acetylenol EH, is Kawake Fine Chemicals Co., Ltd.

<Measurement of the diameter of the dot>

When the diameter of the dot of paint obtained directly after getting paint on plain paper, denoted as dI, the largest diameter distribution of paint after fixing the ink on the paper is denoted as dS, the greatest diameter of the water-insoluble coloring material in the dot after fixing the ink on the paper is denoted as dC, and the depth of penetration of the water-insoluble coloring material is in the paper after drying, the dye represented by the depth of penetration, the values of dI, dS, dC, and the depth of penetration is measured using the following methods. First measure the diameter dI of dot paint directly after hitting dot of paint on plain paper using a Face CONTACT ANGLEMETER CA-P, produced by Kyowa Interface Science Co., Ltd. Using a needle having a diameter of 28 G needle (inner diameter of 0.18 mm and an outer diameter of 0.36 mm), the needle tip is placed on a height of 4 mm from the surface of plain paper, then paint falling from that height on plain paper, and after dripping the diameter of a dot of paint read on the scale measuring contact angle. Above the registered value are used as the diameter dI of dot paint immediately after getting paint on plain paper. Simple paper used in this study is a PB-paper NSK), manufactured by Canon Inc.

The greatest diameter dS of the distribution of paint after fixing the ink to the medium to be printed and the largest diameter dC water-insoluble coloring material in the ink after fixing the ink on the medium for printing measured by dripping dot of paint on plain paper under the above conditions and leaving it for 6 hours or more and by measuring the corresponding maximum linear dimensions after stabilization of dot edge is key. The greatest diameter dS dot paint after fixing the ink to the medium to print get by measuring the largest linear size distribution of blue water-soluble dye C. I. direct blue 199, which was added to the paint. The largest diameter dC water-insoluble coloring material in the ink after fixing the ink to the medium to print get by measuring the greatest linear dimension of the spreading of the black hue of the pigment contained in the paint. In addition, when measured the largest diameter dC of spreading water-insoluble coloring material in the ink, the shape of the halftone dots for the black pigment may also occur.

<Measurement of the depth of penetration of the water-insoluble coloring material>

To measure the depth of penetration of the water-insoluble coloring material is a water-soluble dye C. I. direct blue 199 in each of the inks of the above example 6 and comparative examples 18-20 replace water. Thus obtained paint then filtered under the same conditions, in order to make new colors. Using these paints, carry out printing on PB-paper NSK), manufactured by Canon Inc., under the same conditions as in the above estimation of the density of the print, with the use of the modified device to the article is oinoi print HEL-700 (manufactured by Canon Inc.), with pulsed head for multi-channel print, which applies thermal energy to the ink in response to a print signal, so as to throw the paint. After printing and fixing of ink printing area cut from the reverse side using the blade, and a transverse incision is observed in the microscope. Measured thickness (depth) distribution of the water-insoluble coloring material in the context of the paper. On the obtained measurement results are evaluated in accordance with the evaluation criteria described below. The results of the estimates and the measured values with the largest diameter dC is shown in table 9.

[Evaluation criteria]

(The ratio of the diameters of the dots)

O: satisfies the ratio of dC<dI<dS.

X: does not meet the ratio of dC<dI<dS.

(Form dot water-insoluble coloring material)

1: Visual observation, looking at the paper on top

O: Form dot water-insoluble coloring material is a perfect circle, and its edge is sharp.

X: the shape of the dot of water-insoluble coloring material is not a perfect circle, and its edges are blurred.

2: Visual observation, looking at the paper on the side

O: Raster point water-insoluble coloring material is present almost at the level of the surface of the boom the guy.

X: Raster point water-insoluble coloring material clearly stands above the surface of the paper.

(The depth of penetration of the water-insoluble coloring material)

O: less than 30 microns.

X: 30 μm or more.

Table 9
Measurements of getting paint on the paper and the greatest diameter distribution of the coloring material
Ave. 6EUR. other 18EUR. other 19EUR. other 20
The diameter ratio of the halftone dotsOOXO
Form dot water-insoluble coloring material1. Observation from aboveOOXO
2. The observation sideOXOO
The depth of penetration of the water-insoluble coloring materialOOXX
The largest diameter dC [mm] distribution of the water-insoluble coloring material3.04 from2,843,752,96

Fig schematically depicts a top view of dots that are formed for the above measurements. Fig is a schematic micrograph used to measure the thickness (depth) distribution of water-insoluble coloring material in the cross-section paper. As shown in Fig and in table 9, when using the paint of example 6 and comparative example 18, the water-insoluble coloring material forms a dot in the good range. In the case of comparative example 18, however, water-insoluble coloring material protrudes above the surface of the paper, and thus, the paper surface is covered with excessive amounts of water-insoluble coloring material.

Therefore, when the paint of example 6 is compared with the ink of comparative example 18, coloring material effectively retained near the surface of the boom the guy. On the other hand, when using the ink of comparative example 19, the water-insoluble coloring material forms a dot with a nonuniform distribution. In addition, the water-insoluble coloring material is distributed not only on the surface of the paper, but also in the direction of depth of the paper, causing losses to the coloring material. In addition, when using the ink of comparative example 20, as shown in Fig, water-insoluble coloring material forms a dot in the good range. However, as can be seen from the section of the printing area shown on Fig, which is printed using the device for inkjet printing HEL-700 (manufactured by Canon Inc.), coloring material is distributed not only on the surface of the paper, but also in the direction of depth of the paper. Thus, it is confirmed that in this case, the coloring material is not used effectively.

As is evident from the values with the largest diameter dC of the distribution of the water-insoluble coloring material shown in table 9, the ink of example 6, containing a poor solvent and a good solvent, with appropriate regard is the distribution of the water-insoluble coloring material is larger than the ink of comparative example 18 containing only a poor solvent. This fact also under which it is believed, what pigment ink of the present invention has a sufficiently large ratio of area even for small paint drops and forms an image having a high OD (reflection density). In addition to this, paint that does not contain surface-active substances, are prepared by replacing the product add acetylenics and EO, are used as surfactants, water, in the respective ink compositions of example 6 and comparative example 18. These paints are measured by the diameter of the dot and the depth of penetration of the water-insoluble coloring material under the same conditions of measurement getting paint on plain paper, carried out with the ink of example 6 and comparative example 18. As a result, although the paint does not contain surfactants, require a longer time secure after contact with the paper than the ink containing surfactant, paint containing as a poor solvent and a good solvent, if appropriate relation, reaches the distribution of water-insoluble coloring material is larger than the ink containing only a poor solvent, provided the same ratio as paints containing surfactant.

[A study on the blend color is (spreading) of the image]

<Examples 7-16>

The above-described inks of examples 1-5 are used as a black ink in combination with a colored ink to form images. Colored paint used here (three colors: cyan, Magenta and yellow) is prepared as follows.

(Preparation of blue paint)

Components listed below are mixed and fully stirred, so that they dissolve, and then the mixture is subjected to filtration under pressure using a microfilter with a pore size of 0.2 μm (manufactured by Fuji Photo Film Co., Ltd.), in order to make blue paint.

DBL (direct blue 1993.5 parts
Glycerinto 7.5 parts
Diethylene glycolto 7.5 parts
Acetylenol E-1001.0
Clean water80,5 part

(Preparation of Magenta)

Purple paint is prepared from the following components in the same way as for the blue paint.

AR (acid red) 2892.5 parts
Glycerinto 7.5 parts
Diethylene glycolto 7.5 parts
Acetylenol E-1001.0
Clean water81,5 part

(Preparation of yellow ink)

The yellow dye is prepared from the following components in the same way as described above.

DY (direct yellow 862.5 parts
Glycerinto 7.5 parts
Diethylene glycolto 7.5 parts
Acetylenol E-1001.0
Clean water81,5 part

<Rating>

Black inks of examples 1-5 and cooked above a colored dye are used in combination, as shown in table 10 below, and perform printing through the use of these paints and device for inkjet printing, having a pulse head for multi-channel print, depicted in figures 9 or 10, which applies thermal energy to the ink in response to a print signal, however, mo is to throw out the paint. After this printing estimate. The obtained evaluation results are shown in table 11.

Table 10
Types of black paint and heads used to assess print
The head structureBlack paint
Example 7Fig.9Example 1
Example 8Fig.9Example 2
Example 9Fig.9Example 3
Example 10Fig.9Example 4
Example 11Fig.9Example 5
Example 12Figure 10Example 1
Example 13Figure 10Example 2
Example 14Figure 10Example 3
Example 15 Figure 10Example 4
Example 16Figure 10Example 5

(Properties of spreading)

Continuous areas formed by printing with black ink and each of the color inks (yellow, Magenta, and cyan), so the plots are next to each other, by a printing method, depicted in figures 9 and 10. The degree of bleeding at the boundary between the black ink and the color ink is observed visually and evaluated according to the criteria described below. Simple paper used here is a PB-Paper (paper NSK), manufactured by Canon Inc. The evaluation results are shown in table 11.

AA: the Spreading cannot be observed visually.

A: Flow hardly occurs.

B: Feathering is observed, but the level actually is not a problem.

C: the Spreading is that the color borders are fuzzy.

Table 11
The results of estimates
Resistance to spreading
Example 7A
Example 8 A
Example 9A
Example 10A
Example 11A
Example 12AA
Example 13AA
Example 14AA
Example 15AA
Example 16AA

Industrial application

The water-based paint of the present invention is a pigment ink, which has a fairly large coefficient space, even for a small paint drops and reaches the image with high OD (reflection density). In addition, using paint of the present invention also provides a method of inkjet printing for forming high-quality images with high OD even for a small application quantity of ink, ink cartridge, preferably used for the above printing method, the host printing device and inkjet printing. In addition, it also provides a method of forming images in which effectively prevents color mixing (R is runoff) at the boundary between the area of black paint and area color paint, without causing diffusion of the ink when a color image in which different colors are adjacent to each other, is printed on plain paper.

1. Method of inkjet printing, which includes at least the stage of applying water-based paints on the recording medium by means of the method of the emission of jets of ink, and this ink contains water, many water-soluble organic solvents and water-insoluble coloring matter,
where the composition specified many different water-soluble organic solvents include at least one good solvent for the specified water-insoluble coloring matter, and a few poor solvents for the specified water-insoluble coloring matter, and the total number of A (wt.%) good solvent in the paint and the total amount (wt.%) poor solvents in the paint are in the ratio A:from 10:5 to 7:9, in both cases, inclusive,
where the aforementioned at least one good water-soluble organic solvent selected from the group consisting of glycerol and ethylene glycol, and at least one of these few bad solvents selected from the group consisting of diethylene glycol, polyethylene glycol and 2-pyrrolidone,
where mentioned water-insoluble coloring matter selected from the group status is the present of the pigment, dispersed resin; microencapsulating pigment; satismarriages pigment having a hydrophilic group attached to the surface of pigment particles through other groups or atoms; and satismarriages polymer-binding pigment, and
where the above-mentioned recording medium is a plain paper, and
where water-soluble organic solvents include poor solvent having a Ka value determined by using method Bristow, which is the largest of the values of Ka for all water-soluble organic solvents present in the paint.

2. Method of inkjet printing according to claim 1 where the above-mentioned water-insoluble dye is a carbon soot.

3. Method of inkjet printing according to claim 1 or 2, where the above hydrophilic group of a pigment selected from the group consisting of-COOM, -SO3M1 and RHO3H(M1)2where M1 represents a group selected from the group consisting of hydrogen atom, alkali metal, ammonium and organic ammonium compounds.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to ink systems for jet printing, containing a fixing composition with low corrosion activity. The invention discloses a fixing composition for jet printing, containing water or a mixture of water and at least one water-miscible organic solvent, and a polycationic fixing agent whose counterion is not a halogen, where the counterion is selected such that it reduces availability of the halogen in the fixing agent. The invention also discloses a method of applying an essentially noncorrosive ink composition and a jet system for providing ink with low corrosion activity.

EFFECT: invention reduces the negative effect of the fixing agent on components of the printing head while preserving all its useful properties.

10 cl, 2 dwg

FIELD: printing.

SUBSTANCE: system for inkjet printing is described, including inks for inkjet printing, containing a mixture of free binders and a modified pigment, fixative and a porous carrier material. Free binder is a polymer from the group consisting of polyethyleneimines, poliguanida, imide and styrene maleic anhydride, quaternary ammonium compounds, styrene-polyacrylate, copolymer of styrene and maleic anhydride, polyurethane and their mixtures at a ratio of molecular weights of two polymers from 0.001 to 10. Method of printed images receipt is also described, including the provision of a porous carrier material, coating him with specified inks for inkjet printing and then - fixative.

EFFECT: proposed inks provide improved image stability to the formation of streaks under the influence of moisture without reducing the colour density of the image.

16 cl, 6 tbl, 4 ex

FIELD: mechanics; polygraphy.

SUBSTANCE: digital-control machine for printing on fabric incorporates a front and rear feed devices driven by the transfer shaft arranged inside the drive panel of the front and rear base parts so as to eliminate folds and banding formation resulting in printing defects. An elongated duct to withdraw printing ink is arranged at the base top to collect printing ink remainders to rule out smearing on ink on the fabric. At least one suck-in pan is provided inside the base to facilitate the ink remainders collection, while, to accelerate ink drying, a heater is mounted inside the base front part, coated with a rubber material.

EFFECT: high-efficiency printing on very thin fabrics.

10 cl, 7 dwg

Active monoazo dyes // 2287542

FIELD: dyes.

SUBSTANCE: invention relates to active dyes designated for staining or printing of hydroxy- or nitrogen-containing organic substrates. Invention describes novel monoazo dyes comprising sulfatoethylsulfonyl groups of the formula (1) given in the invention description, mixtures of dyes and their using for staining or printing of hydroxy- or nitrogen-containing organic substrates and in dyes for jet printing. Proposed dyes provide the enhanced light resistance of painting and mixtures of dyes comprising the proposed dye possess the enhanced dyeing capacity as compared with individual dyes.

EFFECT: improved and valuable properties of dyes.

8 cl, 3 tbl, 45 ex

FIELD: ink-jet printing facilities and materials.

SUBSTANCE: invention relates to ink-jet printing on sheet-shaped substrates such as paper, films, and textiles. In particular, invention discloses a method for ink-jet printing on sheet-shaped substrates using aqueous ink including (i) at least one dye of formula (I): (I), wherein R1 and R2, each independently of the other, represents hydrogen atom or unsubstituted or substituted C1-C4-alkyl; R3 and R4, each independently of the other, represents unsubstituted or substituted C1-C4-alkyl; R5 and R6, each independently of the other, represents C1-C4-alkyl, C1-C4-alkoxy, halogen atom, hydroxyl, carboxyl, C2-C4-alkanoylamino, or sulfo group; X represents halogen atom, hydroxyl, C1-C4-alkoxy optionally substituted in alkyl residue, phenoxy optionally substituted in phenyl residue, C1-C4-alkylyhio optionally substituted in alkyl residue, phenylthio optionally substituted in phenyl ring, amino, C5-C7-cycloalkylamino optionally substituted in cycloalkyl residue, phenyl- or naphthylamino optionally substituted in aryl residue, N-C1-C4-alkyl-N-phenyl- or N-C1-C4-alkyl-N-naphthylamino optionally substituted in aryl residue, benzylamino optionally substituted in phenyl residue, morpholine, or pyperidin-1-yl; and n and m each is a number 0, 1, 2, or 3; and (ii) compound selected from polyethylene glycols with molecular mass from 150 to 400.

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12 cl, 1 tbl

The invention relates to light industry and provides a stable image on all types of fabrics

The invention relates to methods and devices for printing on textile material

FIELD: printing industry.

SUBSTANCE: ink contains a liquid carrier, which includes water, an organic dissolvent and an organic amine, selected from 2-amino-2-methyl-1-propanol, 2-dimethylamino-2-methyl-1-propanol, diethanolamine and their mixtures; and a dye of an acid-sensitive pigment, encapsulated into a polymer, which is a copolymer of sterol, acrylic acid and methacrylic acid or its ether, dispersed in the liquid carrier. Also an ink set is described for jet printing, as well as a method to print images with application of the specified ink.

EFFECT: improved quality of images both on glossy surface and on plain paper.

14 cl, 6 tbl, 6 ex

FIELD: printing industry.

SUBSTANCE: dye composition for jet recording is proposed, containing a ground pigment, a surfactant and a system of non-aqueous dissolvents. The system of non-aqueous dissolvents includes 1) from around 50 wt % to around 95 wt % of the main system of co-solvents, selected from a group of ethers of propylene glycol, acetates of glycol ether, ketones and esters, having surface tension of less than 32 dyne/cm (32x10-5 N/cm) at 25°C; 2) from around 1 wt % to around 30 wt % of the second system of co-solvents selected from a group of n-ethyl pyrrolidone, propylene carbonate, N-methyl pyrrolidone, methyl ester of lactic acid, 1,3-butanediol and glyceryl acetate, having surface tension of more than 32 dyne/cm (32x10-5 N/cm) at 25°C; 3) from around 1 wt % to around 10 wt % gamma-butyrolacton; 4) at least 2 wt % of resin dissolved in the dye composition. Also a group of dyes is proposed, containing the specified dye composition, as well as a method of images printing.

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13 cl, 7 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to ink systems for jet printing, containing a fixing composition with low corrosion activity. The invention discloses a fixing composition for jet printing, containing water or a mixture of water and at least one water-miscible organic solvent, and a polycationic fixing agent whose counterion is not a halogen, where the counterion is selected such that it reduces availability of the halogen in the fixing agent. The invention also discloses a method of applying an essentially noncorrosive ink composition and a jet system for providing ink with low corrosion activity.

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Protective element // 2419549

FIELD: printing industry.

SUBSTANCE: invention relates to a thermochromic printing ink for gravure printing, to a data carrier with a printed image made by the gravure printing method using such a printing ink, and also to method of making such a printing ink and the specified data carrier. The thermochromic printing ink for gravure printing contains a microcapsulated three-component mix with a weight ratio from 25% to 40%, made of at least one electron donor, at least one donor acceptor and at least one dissolvent.

EFFECT: proposed thermochromic printing ink provides for generation of image with fine linear pattern and a microtext, which is characterised by easily distinguishable thermochromic effect and a convex shape, which develops a counterfeit protection effect.

21 cl, 3 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a coating composition for making substrates, preparation thereof and use, which contains colour-forming substance, polymer binder, solvent, additional components and a salt of an organometallic compound with an amine of formula where X is Si or B, R3, R4 and R5 denote H, alkyl, allyl, or R3 and R4 together with a nitrogen atom form a morpholine ring; o and p = 0 or 1, E and F are selected from R6 and R7 = H, R1 is phenyl or R1 together with R2 form a residue selected from

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13 cl, 13 ex

FIELD: chemistry.

SUBSTANCE: invention describes a dustless powdered pigment composition which is essentially free from binder substances and contains: at least 60 wt % of at least one nacreous pigment, 1-15 wt % non-ionic monomeric wetting substance and/or polysiloxane-based non-ionic wetting substance and 1-39 wt % solvent or mixture of solvents, wherein the total amount of separate components equals 100 wt %. Said non-ionic wetting substance contains OH groups and has hydroxyl number from 30 to 150 mg KOH/g of wetting substance, preferably from 50 to 120 mg KOH/g of wetting substance. The invention also describes a method of preparing the pigment composition and use thereof.

EFFECT: use of disclosed dustless pigment composition in printing ink enables to obtain prints with high resistance to wet treatment.

16 cl, 1 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to reactive metal-complex azo dyes, specifically to reactive dyes of formula where R1 is hydrogen, (R2)5 is a nitro group, X is chlorine, T is a radical of formula , ,

or

,

where (R3)0-2 -0, Z is a vinyl or -CH2-CH2-U, U is a group removable in an alkaline medium, Q - -CH(Hal)-CH2-Hal or -C(Hal)=-CH2, Hal is a halogen, s equals 0 or 1.

EFFECT: disclosed dyes have high resistance to wet processing, especially when dyeing or printing synthetic polyamide fibre materials.

7 cl, 12 ex

FIELD: chemistry.

SUBSTANCE: water based flexographic contains biodegradable polyhydroxyalkanoate (PHA) consisting of monomers having the following formula: where n is an integer from 1 to 5, and R1 is selected from a group comprising hydrogen, alkyl from C1 to C20, and alkenyl from C1 to C20, and having molecular weight ranging from 500 to 5000000 g/mol, binder substance which is three-block amphiphilic compound having two hydrophobic terminal areas with linear and/or branched aliphatic chains CnH2n+2, n = 1-40, and one central hydrophilic area - polyethylene glycol and its derivatives; or having one central hydrophobic area with linear and/or branched aliphatic chains CnH2n+2, n = 1-40, and two hydrophilic terminal areas, a solvent, and a dye or pigment in amount sufficient for leaving a visible mark on a base. Concentration of PHA in the ink ranges from 20 to 80% (weight/volume), concentration of the binder ranges from 0.5 to 20% (weight/volume), concentration of the solvent ranges from 1 to 25% (weight/volume) and concentration of the dye or pigment ranges from 1 to 40% (weight/volume). Described also is a method of preparing water based flexographic ink and a printing composition which contains the said flexographic ink.

EFFECT: improved biodecomposition properties.

13 cl, 6 ex

FIELD: chemistry.

SUBSTANCE: water based flexographic contains biodegradable polyhydroxyalkanoate (PHA) consisting of monomers having the following formula: where n is an integer from 1 to 5, and R1 is selected from a group comprising hydrogen, alkyl from C1 to C20, and alkenyl from C1 to C20, and having molecular weight ranging from 500 to 5000000 g/mol, binder substance which is three-block amphiphilic compound having two hydrophobic terminal areas with linear and/or branched aliphatic chains CnH2n+2, n = 1-40, and one central hydrophilic area - polyethylene glycol and its derivatives; or having one central hydrophobic area with linear and/or branched aliphatic chains CnH2n+2, n = 1-40, and two hydrophilic terminal areas, a solvent, and a dye or pigment in amount sufficient for leaving a visible mark on a base. Concentration of PHA in the ink ranges from 20 to 80% (weight/volume), concentration of the binder ranges from 0.5 to 20% (weight/volume), concentration of the solvent ranges from 1 to 25% (weight/volume) and concentration of the dye or pigment ranges from 1 to 40% (weight/volume). Described also is a method of preparing water based flexographic ink and a printing composition which contains the said flexographic ink.

EFFECT: improved biodecomposition properties.

13 cl, 6 ex

FIELD: chemistry.

SUBSTANCE: reaction liquid used with ink contains a dye and which destabilises the dissolved state or dispersion state of the dye in the ink when in contact with ink on a printing carrier. The reaction liquid contains at least calcium ions, glycerin and polyethylene glycol with average molecular weight between 200 and 1000 inclusively. Content of calcium ions A (wt %) lies between 2.7 wt % and 4.3 wt % inclusively per total weight of the reaction liquid. Total content of glycerin B (wt %) and polyethylene glycol C (wt %) per total weight of the reaction liquid is at least 6 times more and not more than 11 times greater than content of calcium ions A (wt %). The ratio of content of glycerin B (wt %) and total content of glycerin B (wt %) and content of polyethylene glycol C (wt %), (B/(B+C)), lies between 0.3 and 0.7 inclusively.

EFFECT: invention provides high quality of the image obtained on printing material, and also avoids deposit formation.

9 cl, 6 dwg, 6 tbl

FIELD: printing industry.

SUBSTANCE: developer feed device comprises channel arranged between cartridge for developer and developing cartridge. Besides mentioned channel determines passage of developer free drop from specified cartridge for developer into mentioned developing cartridge. Besides device comprises unit for prevention of developer lumps formation, which is arranged with the possibility to reduce presence of developer lumps in mentioned channel and comprises the following components: element for removal of developer lumps arranged in mentioned channel and comprising elastic element; and drive mechanism arranged with the possibility of putting element for removal of developer lumps in motion in mentioned channel. Besides specified motion includes reciprocal motion of mentioned elastic element so that specified elastic element is alternately compressed and stretched.

EFFECT: more efficient removal of developer residues in passage of developer free fall, reduced overload of electric motor for developer supply, provision of continuous quality of image, since possibility of channel clogging is considerably reduced.

24 cl, 4 dwg

The invention relates to a copying-duplicating technique and can be used in its operation with the extension of the normal functioning of the host printer

FIELD: printing industry.

SUBSTANCE: developer feed device comprises channel arranged between cartridge for developer and developing cartridge. Besides mentioned channel determines passage of developer free drop from specified cartridge for developer into mentioned developing cartridge. Besides device comprises unit for prevention of developer lumps formation, which is arranged with the possibility to reduce presence of developer lumps in mentioned channel and comprises the following components: element for removal of developer lumps arranged in mentioned channel and comprising elastic element; and drive mechanism arranged with the possibility of putting element for removal of developer lumps in motion in mentioned channel. Besides specified motion includes reciprocal motion of mentioned elastic element so that specified elastic element is alternately compressed and stretched.

EFFECT: more efficient removal of developer residues in passage of developer free fall, reduced overload of electric motor for developer supply, provision of continuous quality of image, since possibility of channel clogging is considerably reduced.

24 cl, 4 dwg

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