Pigment for usage in the coatings of the registering medium of the ink-jet printing systems and the methods of the pigment production

FIELD: chemical industry; computer industry; methods of production of the pigments used in the coatings of the registering medium of ink-jet systems.

SUBSTANCE: the invention is pertaining to production of the pigments suitable for usage in the compositions of the registering mediums used for the ink jet printing. The invention provides, that the surface of the pigmental loose material is subjected to action of the water-soluble salt of the polyvalent metal in the aqueous medium. The treated surface of the particles gains the sizeable cationic surface charge. The salt represents the metal salt of the Group II or the Group III of Periodic table. The registering mediums for the ink-jet printing treated with the coating composition containing the indicated pigment ensure the high density fast-drying and anti-bleeding colorful images with the sufficient water-resistance. The compositions used for creation of the coating also have the advantage pertaining to the net cost and to the improved rheology at the more higher content of the pigment in the coating as compared with the coatings based on the siliceous pigments.

EFFECT: the invention ensures production of the coatings with the indicated pigment having the high density, fast-drying and anti-bleeding colorful images with the sufficient water-resistance at the low net cost, the improved rheology at the more higher content of the pigment in the coatings, as compared with the coatings based on the siliceous pigments.

30 cl, 5 dwg, 7 tbl, 7 ex

 

The technical field

The present invention relates to pigments for coating compositions of the recording medium for ink, in particular intended for inkjet printing, and to methods of preparation and application of pigments songs to cover.

The level of technology

Ways inkjet Desk are one of the most important and widely used technology for high-speed electronic printing. Inkjet printers are generally many of nozzles connected to the ink on the liquid basis. The nozzle can be used with the purpose of spraying ultrafine liquid droplets of paint. Typically, the number of nozzles is adjusted so that the nozzle was myprincipal drops of paint in the configuration of characters or images on the surface of the paper. The predominant technology of inkjet printing, which currently use the printer manufacturers are thermopositive and piezoelectric printers. In inkjet printers is traditionally used water-based paint. Conventional paints contain a small amount of paint pigment in the vast amount of water as a carrier.

Used on inkjet printer paper largely determines the quality of the printed image. The paper, which is suitable for inkjet printing, usually is about consists of a paper base, coated with the composition, improves the absorption of ink by the paper. Base paper for absorbing the paint coatings are typically made from bleached chemical pulp, which is added fillers, dyes and, if necessary, sizing agents and additives which increase the strength. Traditional composition absorbing paint coatings applied to base paper, typically includes a binder and a porous fine powder that can absorb applied to the paper surface paint. Currently, Matt and high-gloss paper for inkjet printers are sold at a significant premium compared to uncoated papers.

Whiteness and absorbency of the paper greatly affect the image quality. Standard uncoated paper is usually not suitable for inkjet printing with high resolution. Rough or coarse paper diffuses the light in more directions than paper with a smoother surface. Smoother paper makes a printed image brighter, while other factors remain the same. As for absorption, perfect for when deposited by sputtering on the paper-based paint remains in the form of a dense symmetric point. The paint must be absorbed by the paper too far, as applied dissolved, and the population point will lose the optical density on the paper surface and will tend to "bleed". "Bleed" means that the applied spray point of the ink is absorbed by the paper so that it is irregularly distributed in the lateral direction, covering more area than was calculated. In the result, the printed image looks a bit blurry, especially around the edges. High quality inkjet paper in the ideal case should be pre-coated film, which would keep the paint close to the surface of the paper, giving the printed image of high optical density, giving the aquatic environment or the media to be absorbed deeper into the material paper and accelerating the hardening and drying of the paint. This favors higher printing speeds and reduces problems erase or move the paint, resulting in low absorption of the media. Thus, the desired improved print quality and faster drying paint. Achieving the proper balance of these properties is a difficult task, especially at higher resolving ability of the printer and the reduced diameters of the dots.

Currently, the most widely used pigment for coatings in the manufacture of paper inkjet coating is silica. Structured silicas are synthetic products. Silica is usually asgaut acceptable balance suitability for inkjet printing method and attribute paint drying. However, the practice to date, the use of silica for this purpose has drawbacks. Silica is relatively expensive to produce. In addition to the relatively high cost of silicas have to deal with dust in the crushing of silica in the coating process. In addition, the silicas have a large specific surface, which containing coatings tend very quickly to tagomatic with small increases in silica content. For this reason, applied to the inkjet paper coatings using silica particulate silica material is usually selected to be relatively low, whereas to achieve a sufficiently high strength of binding requires relatively large quantities of binder. High viscosity coatings that occur at low levels of pigment, due to the use as an absorbing pigment in the coating of paper silicas, complicates the regulation weight of the coating at such low levels of solid material. High specific surface area of silica is useful because it creates an open structure in the continuous phase of the binder. This open structure allows rapid absorption of the ink, resulting in high capacity red and dry out on an inkjet printer.

In U.S. patent No. 4478910 paper describes for the registration of an inkjet method, comprising a base sheet with a certain degree of sizing, having a coating layer comprising fine particles of silica and a water-soluble polymer binder.

In U.S. patent No. 6140406 and 6129785 describes a coating composition for a recording medium for inkjet printing, comprising the aqueous suspension of adsorption of silica pigment, binder based on polyvinyl alcohol and a cationic fixing agent. The pigment is mainly a mixture of 75% or more of silica gel having a pore volume of 0.5-2.0 cm3/g, and 10% or more of alumina trihydrate or aluminum oxide.

In U.S. patent No. 5985424 describes a coated paper for inkjet printing, in which there is a base coating layer with good absorption capacity in relation to the media of paint, and the top layer is absorbent coating. In one of the preferred embodiments the base layer contains a mixture of precipitated calcium carbonate and clay, dispergirovannoyj in a standard binder for coating, while the upper layer contains dust or pyrogenic silica, dispersed in the emulsion, prepared from styrene polymerized in the presence of polyvinylpyrrolidone (non binding).

Along with oxide the silicon coating compositions for paper proposed and other types of pigments. For example, traditional powders of calcium carbonate, used as a pigment coating for paper, do not provide functional improvements of the printing characteristics of the securities coated for inkjet printing. As a consequence, the traditional calcium carbonate can be added to coatings for paper to provide optical effects, for example to enhance the whiteness and smoothness, but it affects printability and the ability to paint drying.

In U.S. patent No. 6441076 describes a composition for coating suitable for inkjet papers, where the composition contains a large amount of calcium carbonate ultrafine particle size (calculated as dry weight) and dissolved partially hydrolyzed low molecular weight polyvinyl alcohol with a small particle size. In this case, the specific surface area of calcium carbonate is very high in order to simulate the operating characteristics of high specific surface area silica. And yet the color reproduction and the drying of paint does not reach the level, which has a sheet coated with silica.

In U.S. patent No. 5397619 describes paper for inkjet Desk, consisting of a paper base and a recording layer on at least one surface containing at least 40 wt.% pigment and not more than 60 mA is.% binder, which (paper) surface roughness desyatietazhny height on the recording surface layer is not more than 5 microns and the permeability is not more than 1000 seconds. The pigment may be silica, carbon black or get wet silica produced by a dry process ultrafine silica or a complex of calcium carbonate with silica, having a structure of particles consisting essentially of silicon oxide, vykristallizovyvalas in crystals of calcium carbonate.

In U.S. patent No. 6274226 describes mesoporous aluminosilicate pigments, prepared using as a binder of polyvinyl alcohol and intended for use in coatings for paper for inkjet printing and carbon-free coatings for paper.

In U.S. patent No. 5997625 describes pigment for coatings for ink jet printing containing the water-clay subjected to alkali leaching of calcined clay and porous mineral.

In U.S. patent No. 5882396 describes a coating composition for paper, intended for the manufacture of coated paper for inkjet printing, which includes composite pigment selected from one or more of: kaolin, calcined kaolin, dolomite, ground natural calcium carbonate, precipitated calcium carbonate, calcium sulphate and talc, the benefits of the NGO containing from 1 to 50 wt.% large Pimenta and from 99 to 50 wt.% finely dispersed pigment with certain recommended distributions of particle size, and hydrophilic polymer adhesive.

In U.S. patent No. 4554181 described sheet for the Desk jet ink having a two-component cationic recording surface consisting of a substrate having a recording surface containing a cationic polymer which is used in combination with a water-soluble salt of polyvalent metal, in which the polymer provides the surface with a cationic groups for ionic interactions with the anionic dye and give it insolubility. In the case where the composition of the coatings contain pigments, in patent '181 not attached any importance to the order of mixing the component of this type with the other ingredients and States that used to obtain the compositions of the coating process of mixing is performed in the same container. In addition, in patent '181 describes the use in the compositions of the coating binder neaning type.

Bómost of cationic polymers in their liquid form are slightly colored in color from pale orange to deep orange-red. Painting purchased from cation-polymer ingredients used in the compositions of the coating of paper, can affect the whiteness and tint of the final coated sheet. In addition, the use of specific cationic pigments leads to different chemical activity of p. the relation to the colour components of the jet ink, that provides a good covering ability, but can change the color of a printed image. It would be desirable to establish the composition of the coatings with lower levels of cationic polymers and which would at the same time satisfy the technical requirements.

There is a need for alternative, cheaper compared to synthetic silica pigments intended for coating of paper, in particular paper for inkjet printing, which would provide the desired coating rheology at high solids content material and even a printing characteristics, including (but not limited to the reproduction color, the print density and ink drying. It would also be desirable if the pigments of the coating retained its function with a standard binder coating paper and could be applied in modern ultra-fast paper machine.

Disclosure of inventions

The present invention relates to a pigment suitable for use in the compositions of the coating of the recording medium for ink comprising inorganic granular material with the processed surface obtained by contacting of the surfaces of inorganic granular material with a water-soluble salt of the polyvalent metal in the aquatic environment, where the treated surface has a cationic p is the surface charge, and salt is a salt of a metal of group II or group III of the Periodic table.

Paper covered containing pigments materials, provide a rapid absorption of the medium of paint, the fixation of the dye on the surface and good surface properties due to low consumption binder for coatings. The recording medium for inkjet printing-treated coating compositions containing the above-mentioned pigment, provide high density, quick drying and neraspavsheysya image with increased resistance. The pigments of the present invention are effective functional substitutes relatively more expensive silica pigments and can be applied at high solids content material on a standard paper machine.

In one of the embodiments of the coating composition of the present invention can contain from about 45 to about 70 wt.% more specifically from about 50 to about 65 wt.% surface-treated pigment, and remain available for processing, and to have a good performance.

In one of the embodiments of the present invention the compositions of the coatings are produced by a method in which, before the pigment is put into contact with a cationic polymer, inorganic pigments pre-treated separately Sol is Yu polyvalent metal of group II or group III of the Periodic table, in the resulting water-soluble salt of polyvalent metal is in contact with the surfaces of inorganic granular material, forming a surface-treated granular material having on the surface a cationic surface charge, and then during subsequent processing of surface-treated pigment is connected with a cationic polymer in the composition for coating. This method was developed with the purpose to make possible the creation of the compositions of the coating content of solid material up to 60 wt.% or higher without problems gelation. Cationic polymer mainly containing Quaternary amine compound, more preferably an epichlorohydrin-polyamino connection.

The term "gelation" for the purposes of this application means a high degree of coagulation, which is undergoing a pigment, as a result of which it becomes impossible to continue the operation of the mixing due to the rapid growth of high viscosity.

In another embodiment, the pigments are separately mixed with a cationic polymer containing a Quaternary amine compound, with subsequent introduction into contact with the mineral and surface salt of a metal of group II or group III of the Periodic table, which (incarnation) was designed to make possible the creation in whom is Aziziyah cover content levels of solid material up to 45 wt.% or higher, without problems gelation.

If you do not follow this sequence of mixing with mineral according to embodiments of the present invention, it was observed that the composition of the coating with at least 45 wt.% the solid material obtained using cationic polymers and pigments, can not be obtained. Along with this, the present invention allows to reduce the amount of cationic polymer, which would be required for the compositions of the coatings in other cases.

When using the coating compositions according to the invention is also achieved greater uniformity in the appearance of the coating. In addition, the present invention allows the use of less binder content and use in coatings for inkjet printing standard types of binding.

The decrease in specific surface area used in the present invention the pigment leads to simplification of the preparation and reducing the cost of the composition. Small specific surface area of the pigment of the present invention improves the ability of paint to the drying throughout the coating structure. In one of the embodiments of the necessary interaction of the ink recording medium for inkjet printing is achieved by using a pigment for coating in accordance with one of the embodiments of the present invention, in which the pigment on ucaut of inorganic granular material with a relatively small specific surface area, such as precipitated calcium carbonate (PCC) or ground calcium carbonate (GCC), having a specific surface area less than approximately 15 m2/, This ability is unexpected, given existing in the field of coatings for paper for inkjet printers tend to use in coatings for paper of calcium carbonate with a high specific surface area (i.e. more than 30 m2/g). For the purposes of this application "specific surface area" is measured by the BET method.

In this case, when the surface of the PCC or GCC, which is an alkaline material, processed, strongly acidic reagents of the type of salts of polyvalent metals according to the invention, such as hydrochloride aluminum (ASN) (pH 4-5), unexpectedly it was found that in the process of processing the surface of the ASN does not dissolve the particles of calcium carbonate. In addition, the high cationic charge generated on the surfaces of the particles when processed by ASN, is maintained even at high alkaline pH values after surface treatment, without causing an excessive increase in the content of CA2+that indicates dissolution of the particles. Paper coated with such a pigment, behaves as if its surface is cationic in nature. Thanks to this paper, such a coating can print high-density image, especially in the use of the implement inks for inkjet printing, having anionic nature. The use of the ASN provides uniform absorption of all dyes paints, making possible a more natural colour reproduction.

Thus, the cation-charged pigments of the present invention in an unexpected way can be used with anionic binders in coating compositions for paper, not creating a high viscosity. As a result, the pigments can be used with a standard anionic latexes, such as latex based on styrene-butadiene rubber binder, polyvinyl acetate binder polyvinyl acetate, etc. and other latexes are also attractive due to their cost and terms of usability. The result is the possibility of increasing the content of solid material in coating compositions for paper up to 45 wt.% or higher while reducing the binder content, which facilitates the use of the compositions for coatings on modern paper machines.

Pigment with low specific surface and a low content of binder in coating compositions for paper provide improved hiding power, which manifests itself in the form of high white coating, which is seen as a consequence of translucency coating formed on top of the printed substrate. When this pigment is not PR shall provide coverage unwanted color shades, have low odor and low viscosity flow in the form of a water suspension.

The pigments of the present invention can be used to enhance printing performance over a wide range of printing substrates, such as sheets and rolls coated paper and uncoated paper of a plastic fiber, plastic film, metal foil, coated paperboard, uncoated cardboard, etc. Coating paper for inkjet printing, in particular for matte paper, can be successfully prepared using decrementing pigments according to the present invention. The pigments of the present invention may also be suitable for compositions for coatings for high-gloss papers. The above benefits are equally valid for the composition to cover the less expensive paper for inkjet printing.

The present invention relates also to the composition of the coating, because the coating composition is completely unique in the application of binder based on anionic latexes, as well as low levels of these binders in coating for inkjet printing.

Brief description of drawings

Figure 1 represents the block diagram of the technological scheme of production and application of pigment and coatings for paper according to one of embodiments of the invention.

Figure 2 is a block diagram of the technological scheme is proizvodstva coatings for paper according to one of specific embodiments of the invention.

Figure 3 is a block diagram of the technological scheme of production of coatings for paper according to one of the alternative embodiments of the invention.

Figure 4 is a graph illustrating various mixtures of fine and structured clay and their influence on the density of printing inks and the speed of paint drying, as described in the example given here.

Figure 5 is a graph representing the particle size distributions of ultrafine ground calcium carbonate (UFGCC), as described in the example given here.

The implementation of the invention

According to the previous disclosure of the subject of the present invention is a unique surface-treated pigment which can be used in the compositions of coatings for paper. Surface-treated pigment has a cationic surface charge, effectively attracting anionic dyes, paint, etc. Along with other things of paper, having a coating containing described in this application is surface treated pigments, in line with the commercial requirements for a high quality, water resistance and suitability for high-speed printing on paper or other substrates for printing, coated with compositions on the basis described in the application of surface-treated pigments. As described in the application surface is Resto treated pigments are also low cost alternative to silica pigments, and containing coatings for paper needs fewer binders and have improved rheology. Along with this, the present invention includes methods of preparing coating compositions comprising surface-treated pigments and cationic polymers that can increase the solid content material. The invention as such provides lower cost, high solid content material, as well as high-performance coated paper for inkjet printing and the other suitable for digital printing substrate.

Figure 1 presents as a non-limiting illustration of the invention, the process 100 to obtain a surface-treated pigment having significant cationic surface charge, and the use of this pigment in other intermediate and final products.

Inorganic granular source material is a bleaching agent in solid powder form. In one of preferred embodiments of the inorganic granular material consists of particles of calcium carbonate (caso3). Bulk calcium carbonate comes either in the form of machined natural callicarpenal material, or chemically synthesized reaction product.

Particles of calcium carbonate can be ground natural carbonate to LCIA (GCC), as described for stage 101. The original natural materials for calcium carbonate are marble, limestone, chalk and coral. These natural sources of calcium carbonate are subjected to mechanical processing, including crushing to the formation of the granular material forms, such as ultrafine ground calcium carbonate (UFGCC). Usually made redispersible grinding or, alternatively, when the grinding can be applied volatile dispersant.

Alternatively, particles of calcium carbonate can be supplied in the form of a synthetic reaction product in the form of precipitated calcium carbonate (PCC), as described for stage 102. Using deposition processes can be chemically obtained a great variety of sizes and shapes of the particles of calcium carbonate. Besieged callicarpenal products have a more uniform distribution of particle size and higher degree of chemical purity in comparison with commercially available GCC. However, the GCC can be less costly.

Calcium carbonate is usually deposited either in the form of calcite crystals which, as a rule, are orthorhombic, cubic, or scalenohedral form or in the form of aragonite, having a needle shape. Another besieged form of calcium carbonate is Wouter, which, as is known in the art, is met is stable.

Precipitated calcium carbonate is usually produced in the reactor by carbonization of a suspension of slaked lime, or lime milk, which is produced by slaking quicklime (Cao) with subsequent dewatering/filtering the reaction product to the desired particle size and distribution. Suitable for the deposition of calcium carbonate methods well-known and applicable to this case. Although not usually required for this application, untreated particles synthesized calcium carbonate may also be dispersed or ground to the desired limits of the distribution of particle sizes using the methods described, for example, in U.S. patent No. 6143065 and 6402824 (Freeman et al.), moreover, these descriptions are included in the present application as reference material.

Raw particles of calcium carbonate can then be submitted to the block surface treatment stage 103 in the form of a primary aqueous slurry. Alternatively, the raw calcium carbonate may be submitted to a surface treatment in the form of a dry powder, which is dispersed in water with the formation of the suspension at the initial operation of the surface treatment.

Raw particles of calcium carbonate supplied to the processing surface, typically have a particle size from about 0.1 microns to about 5.0 microns, in bol is e case from about 0.5 microns to about 2.0 microns. The distribution of particle sizes, which is determined by the slope (steepness factor), mostly less than approximately 1.8. The term "slope" means the quotient resulting from dividing the value of the diameter, in relation to which a smaller diameter have 75% of the particles (the numerator)by the value of the diameter, in relation to which a smaller diameter have 25% of the particles (the denominator), where the particle size measured by a particle size analyzer (Sedigraph). Precipitated calcium carbonate (PCC) or ground calcium carbonate (GCC) usually has a specific surface area less than approximately 15 m2/, White in accordance with TAPPI (Technical Association of Pulp and Paper Industry, USA) particles of calcium carbonate is usually not less than about 96 both before and after the described surface treatment.

Inorganic white pigment material, which may be surface treated according to the present invention is not limited to calcium carbonate. This material may, for example, also be powders of three-hydrate of aluminum (ATH) and/or magnesium hydroxide (Mg(OH)2), etc. However, calcium carbonate is especially preferred because it not only suitable for the described in the application of surface treatment used to make the particles of the cationic surface charge, but the calcium carbonate also increases opaque is th whiteness and resistance to yellowing and aging containing coated paper.

Particles of calcium carbonate, the last phase 101 or 102, then come to the stage surface treatment which imparts or increases the cationic charge on the surfaces of particles of calcium carbonate to effective for use in printing level, as indicated for stage 103.

Callicarpenal pigment subjected to a surface treatment of a water-soluble salt of the polyvalent metal of group II or group III of the Periodic table, dispersed in a normal aquatic environment.

In one of preferred embodiments of the salt of polyvalent metal is hydrochloride aluminum. In this application for hydrochloride aluminum is sometimes abbreviated "ASN".

ASN has a chemical structure of Al2(OH)nCl6-n. ASN can be obtained by the reaction of hydrated aluminum oxide with hydrochloric acid according to the following General equation: 2l(OH)3+nHCl→Al2(OH)nCl6-n+nH2O, where 1≤n<6. The relative activity of ASN-product is denoted as (%) = n/6×100. Preferably used for the invention, the reaction product is a reaction product is carried out in such a way as to obtain a product with an activity higher than approximately 50% or even 75%. Nab is emer, if n is 5, the chemical structure corresponds to the Al2(OH)5Cl (CAS Number 12042-91-0). ASN has also sold in powder form or in solution, for example, from Reheis, Berkeley, NJ 07922, USA.

ASN is added to the surface of the particles of calcium carbonate in a quantity sufficient to provide amplification of the cationic surface charge, which is correlated with observable and measurable increases in the density of print or krasovickaya ability securities for inkjet printing with a coating composition containing the surface-treated pigment. The number of added ASN necessary to achieve such improvements, can be determined empirically with the use proposed in the application instructions. This number is usually, but not always, is in the range from about 0.1 to about 5% (based on dry weight of calcium carbonate. Calcium carbonate prior to its introduction into the coating composition for paper mainly processed, and ASN can be added in the wet or dry form.

Increasing cationic charge, the reported surface treated pigments by ASN-processing, can be directly measured qualitatively and quantitatively by using taraudage analyzer type detector charging particles Mμtek PCD02. It can also be demonstrated by comparing the quality is and print: the print density, drying paint, etc. of securities, covered with coating compositions containing surface-treated pigments, print-quality paper, which uses the raw pigment.

Along with this, when the surface of the PCC or GCC, which represents an alkaline material, is treated with a strongly acidic reagents of the type of salts of polyvalent metals according to the invention, such as hydrochloride aluminum (ASN) (pH 4-5), ASN in the process of processing the surface of a completely unexpected way does not dissolve the particles of calcium carbonate. In addition, the high cationic charge generated on the surfaces of the particles when processed by ASN, is maintained even at high alkaline pH values after surface treatment, without causing an excessive increase in the content of Ca2+that indicates dissolution of the particles. Paper coated with such a pigment, behaves as if its surface is cationic in nature. As a consequence, on paper with such a coating can print high-density water-resistant images, especially when using the ink for inkjet printing, having the anionic nature, making the surface of the pigment and the dye are opposite and, thus, mutually attracted ionic charge. Useful and do not result in violations of interaction generated and observed the mine between the surface of the particles of calcium carbonate and strongly acidic ASN, used for processing of these particles according to the present invention was unexpected.

Obtained at the stage 103 is surface treated callicarpenal the product is in the form of suspension. He is an aqueous dispersion of surface-treated particles of calcium carbonate obtained at approximately 30% solids.

Suspension of the product of stage 103 containing surface-treated granular material may be dehydrated using the method of drying, the right to obtain a dried powder form surface treated inorganic granular material without reducing its effectiveness. The dried powder can be used in the preparation of coating compositions for paper, as described for stage 104, as an ingredient, which is the source of pigment. The pigments can be dried to powder form using a method of spray drying or flash drying by evaporation. Equipment and conditions suitable for this purpose may be the equipment and conditions are widely known and used for suspensions of mineral bulk materials.

Alternatively, as described for stage 109, the suspension formed by the surface treatment of the pigment salt of polyvalent metal in the process of dispersing in an aqueous environment with the adiya's 103, can be used directly as an ingredient is a source of pigment in the preparation of coating compositions for paper. This slurry may contain up to about 60 or even 70 wt.% solid material, consisting of surface treated pigments, without the problems associated with high viscosity.

Another alternative is the possibility of mixing a commercially available dry ASN with a dry pigment powder using the method of dry blending. The obtained dry mixture can be made into a suspension with the formation of the same surface-active callicarpenal material.

At stage 105 is received at the stage 104 of the dried powder form of the pigment is packaged using any suitable and convenient way. Alternatively, the slurry containing the surface-treated pigment that comes from the stage 103 (stage 109) can be Packed in leakproof container and sent to the trade. In another alternative embodiment of the phase packing 105 may be eliminated in those cases where the surface treated pigment is produced and used in the coating composition for paper on the same or nearby manufacturing plant. In this case, the product can be transported in bulk SPO is obom using a conveyor, trucks or rail cars (powder), etc. or by means of a pipeline (suspension) between different production units or sections.

On the stage 106 of the surface-treated pigment in combination with a binder and other additives prepared coating composition for paper.

In one of preferred embodiments of the present invention, as shown in the process flow 200 of figure 2, the coating composition is prepared by a method in which inorganic pigments pre-treated separately with salt of polyvalent metal of group II or group III of the Periodic table, followed by the introduction of pigment into contact with a cationic polymer, and a water-soluble salt of polyvalent metal is in contact with the surfaces of inorganic granular material with the formation of surface-treated inorganic granular material having on the surface a cationic surface charge similar to the process that takes place at the stage 103 figure 1. Then surface treated pigments mixed with water at the stage 201 with the formation of the suspension, and then, in a subsequent processing stage 202, which basically can match stage 103 figure 1, the suspension of surface-treated pigments are combined with a cationic polymer, floor the tea composition of the coating or intermediate composition, which can be added to the composition of the coating. Thus prepared coating composition can be used in the operation of the coating on the paper, such as stage 107 in figure 1. This method was developed in order to provide the ability to have the content of solid material in the surface-treated pigment in the compositions of coatings up to 60 wt.% or higher. Cationic polymer mainly composed of Quaternary amine compounds and, more preferably, from the epichlorohydrin-polyamine. In one of the embodiments of the compositions of the coatings of the present invention can contain from about 50 to about 79 wt.% the pigment is surface treated with ASN, and to remain a technological (for example, they do not form a gel and have good features).

In the practice of the present invention as a Quaternary amine compounds can also be used chloride of diallyldimethylammonium (DADMAC). In the number of commercial examples of such Quaternary amine compounds include, for example, TRAMFLOC 865 from Tramfloc, Inc., Tempe, Arizona, and Nalkat 7607 from Ondeo and PRP 2550.

In another embodiment, illustrated in figure 3, uses a process diagram 300, in which at the stage 301 prepare a mixture of water and a cationic polymer comprising Quaternary amine compound, which (mixture) connect the play on stage 302 with pigments, which have not been surface treated with ASN, by thorough mixing to obtain a homogeneous mixture. Then, at stage 303, with the purpose of the surface treatment of the resulting aqueous mixture or slurry of the cationic polymer and pigments injected into contact with the salt of polyvalent metal of group II or group III of the Periodic table. This alternative method was developed for the purpose to be able to have the content of solid material in the compositions of the coatings to 45 wt.% or higher. In one of the preferred embodiments the content of at least about 45 wt.% surface-treated pigment is stable in the composition for coating prepared using this alternative method of the invention. Used in this embodiment of the cationic polymer includes the above-described Quaternary amine compounds.

Failure to comply with these orders contact of the mineral according to embodiments of the present invention have found that compositions for coating with the content of at least 45 wt.% pigment prepared using cationic polymers and pigments, can not be obtained.

Thus, the present invention can combine the inclusion of cationic polymers, which are used to reduce the overall cost prepared what I cover, retaining the benefits that can be seen when applying the treatment of the ions of polyvalent metals. The present invention reduces the need for cationic polymers for the formation of the coating and may even eliminate this need.

Other additives may include commonly used categories of additives for coating compositions intended for use on paper for inkjet printing, such as a crosslinking agent for the binder, a sizing agent, dispersants, rheology modifiers, organic brighteners, starches, etc. In the application contains illustrations of some of these additives.

It is essential that the cationic pigments of the present invention can be used in coating compositions for paper with anionic binder without the occurrence of high viscosity. Due to this, the pigments can be used with anionic latexes such as the latex based on styrene-butadiene rubber binder, polyvinyl acetate binder and the like, polyvinyl acetate and other anionic latexes besides attractive from the point of view of cost.

Since the introduction of increased amounts of surface-treated pigment of the invention the viscosity of the coating is not increased excessively, the content of solid material pigment in paper coating compositions morecostly to about 50 wt.% or even higher, allowing the use of these compositions of the coatings on modern paper machines. The increase in the content of solid material in suspension is made possible by the surface treated pigment having a cationic charge in accordance with the present invention.

In one of its aspects, the coating composition of the present invention includes (based on solids) of ASN-treated pigments in an amount of from about 25 to about 70 wt.%, anionic binder in an amount of from about 2 to about 15 wt.% and cationic polymer in an amount of from about 0 to about 15% wt. More specifically, the coating composition of the present invention includes (based on solids) of ASN-treated pigments in an amount of from about 45 to about 60 wt.%, anionic binder in an amount of from about 5 to about 12 wt.% and cationic polymer in an amount of from about 5 to about 15 wt.%.

At the stage 107 of the substrate for printing is covered at least on one side, and, as a rule, with the two sides a composition for coating cooking on the stage 106. The coating can be applied to the substrate for printing using a suitable method of coating, including traditional methods of coating on the paper. Composition for coating can be applied at low coating weight by means of a dosing what about the press or other suitable means for coating. In another embodiment of the invention is surface-treated pigment can be used in the alternative or in addition, the filler paper introduced into the paper-based.

At stage 108 inkjet printer sprays ink according to the image on the coated paper or other substrate to be printed. The coating weight is typically in the range from 2 g/m2for one particular level printing (in which the coating is applied in the usual way with a low content of solid material) to more than 10 g/m2for levels jet ink of higher quality. The coating weight is typically not depends on whether there is a substrate on which a print is produced in sheet or roll form.

The substrate to be printed, which can be applied to the present invention, do not have mandatory limits and include coated paper and standard paper without coating or in the form of individual sheets or rolls; paper from plastic fibers (e.g., TYVEK sheets), plastic film (for example, vinyl plastic film); a metal foil (e.g. aluminum foil); coated paperboard; uncoated paperboard and other Paper obtained from a commercially available synthetic pastes and mixtures of synthetic pulp paper weight, as a rule, is suitable, in particular paper with anomalnymi absorption characteristics. Cover paper for inkjet printing, in particular in the case of matte paper, can be successfully fabricated using the described in the application decrementing surface-treated pigments. Surface-treated pigments of the present invention can be also suitable for the compositions of the coatings in the case of high-gloss papers depending on the technical conditions of printing.

Water-based paints and colorants for inkjet printers, used for coating of paper containing surface treated pigments according to the present invention, can be prepared in the usual way, taking into account the fact that the anionic dye are preferred and that the paint may include additives such as surface active agents, solubilizing agents, wetting, etc.

Paper covered impregnation containing pigments, provide a rapid absorption of the medium of paint and fixing of dye paint on the surface. This achieves high-density, homogeneous, quick drying and no blurring colorful images with high resistance. The pigments of the present invention are effective functional substitutes for more expensive silica pigments when used in coating with high solids material and a low binder content.

In addition, the pigments of the present invention is fixed dye-based colorants so that the increased resistance to water, which in the case of other variants of coatings for inkjet printing was in contact with raw calcium carbonate.

Low specific surface area of the pigment and a low content of binder in the coating compositions of the paper is the result of increased opacity that is expressed in high white coating, which is caused by the opacity of the coating that is created over the surface to be printed.

Along with this, the surface-treated pigments do not attach to the substrate for printing unwanted color shades, while having a weak halls and low viscosity in the form of an aqueous slurry. In comparison, when many mineral pigments treated industrial cationic polymers such as cationic polymers, Quaternary amine or epichlorohydrin, their suitability for inkjet printing, color density, water resistance and the effectiveness of the coverage actually increased. However, most of cationic polymers carries different amounts of the active component in the range from 30 to 50% and the viscosity is different depending on the molecular weight of the polymer used, resulting in the preparation of the coating composition requires strict control. In addition to the CSO, a serious disadvantage is that the bómost of cationic polymer in its liquid form slightly colored from pale orange to deep orange-red color. Purchased from such cationic polymers colouring can affect the final whiteness of coated sheet. And, in addition, uneven paint absorption of organic cationic polymers can cause problems with color reproduction in the floor. The present invention allows to reduce the amount of cationic polymer or reduce its unwanted effects.

On the contrary, as for the production of bright matte coated paper for inkjet printing, hydrochloride aluminum or similar salts of polyvalent metals are the best agents for surface treatment callicarpenal pigments, because they, among other things, preserve the transparency of the solution in the interaction with the surfaces of the particles of calcium carbonate to form a positive charge and interact with all dye colors so that faithfully reproduce the desired color.

The present invention as such provides a way of modifying particles of calcium carbonate to make them eminently suitable for use in the field of inkjet printing.

SL is blowing examples are meant to illustrate the invention, but the invention should not be construed as limited by these examples. In the examples, unless otherwise stated, parts are given in mass expression.

Experimental tests were carried out with the comparison of the standard formulations of coatings used in the paper for inkjet printing, coating compositions of the invention that are described in the invention is surface-treated pigments.

Example 1

As control tests were conducted initial series of tests on several different types of pigments that have not been subjected to surface treatment of a salt of polyvalent metal of group II or group III.

Coating formulations contained 100 parts of the pigment shown in table 1, together with 8 parts per hundred (pph) of styrene-butadiene latex (i.e. on 100 parts pigment). The coating was applied on the base paper by using a round wire rod with respect to the magnitude of the applied mass of about 10 g/m2.

Were made of the samples of paper with a matte finish with each of the respective pigments, after which they were carried out printing using an inkjet printer HP 820 Cse. The printer was installed on the normal print speed.

The following table 1 shows the observed influence of pigments on the print density (color: as the th - Well, purple - P, blue, black - H), drying paint, gloss printing and other properties.

Table 1
PigmentThe print densityComposite density

paint (W+P+G)
Evaluation of the printed image
WPGHThe reverseBlurBleedGlossyDrying
HG900.590.921.06of 2.26to 2.57BadNoNoGlossMedl.
CG0.530.820.892,582,24BadYesNoGlossMedl.
NA0.520.800.872,182,19BadYesNoDim.Medl.
CS400.510.830.912,192,25BadYesNoPolyplanarHoney is.
CS800.450.790.862,182,10BadYesNoDim.PTS. medl.
Nyacol F0.490.840.931,95of 2.26ChorusNoNoMat.Chorus.
8044C0.460.780.901,322,14ChorusNoNoDim.Chorus.

Identification of pigments

HG90: Hydragloss® 90 is a fine-grained, high gloss kaolin for coating sold by J.M.Huber Corporation.

CG90: Covergloss® is a uniform particle size, high gloss, high Shine kaolin for coating sold J.M.Huber Corporation.

NS: Hydrocarb 90 is a fine-grained, intended for coating ground calcium carbonate (GCC)sold by OMYA, Inc.

CS40: Hubercarb® CS-40 fine-grained designed for coatings precipitated calcium carbonate (PCC)produced by the firm J.M.Huber Corporation.

CS80: Hubercarb® CS-80 is a coarse floor RCC produced by the firm J.M.Huber Corporation.

Nyacol F: colloidal silicate.

8044C: strategy hydrated kaolin with a particle size of 99% < 1 MK, manufactured by J.M.Huber Corporation.

Defining properties

"The print density was determined using a densitometer to measure the reflected x-rays.

"Composite ink density was defined as the sum of the densities of the three colors (W+P+D).

"Reverse" was defined as the image of the white text on a colored background.

"Erosion" was defined as the fidelity of the line in the absence of distortions caused by the spreading of paint.

"Bleed" was defined as the stability of black lines on a yellow background.

Bleed is a measure of the speed of drying.

"Glamour" was determined by measuring the gloss of a Hunter Gloss meter, which measures the mirror surfaces.

"Drying" was identified by visual observation on a solid surface printing.

The results of table 1 show that the raw mineral pigments give a low-density color printing. Fine-grained coating pigments such as NS, Covergloss and CS40 showed good effect add gloss sheet and print, but the speed of drying paint for them was much lower than for other pigments. Low speed paint drying can cause problems otmerivanija, when the printed sheets are collected in a stack in the output bin. The problem of otmerivanija m is potentially more serious problem in the case when printing multiple copies is performed using a faster inkjet printer. For this reason NS, Covergloss and CS40 was considered as not suitable for the manufacture of paper for inkjet printing with a matte finish coating. Instead, however, they can be successfully used for inkjet printing, belonging to the category of glossy.

Table 1 also shows that GCC raw, processed by Nyacol spray dried clay (DP-8044) and processed by Nyacol calcined clay - each of them gives a Matt finish coat at a satisfactory speed of drying paint. Untreated ground calcium carbonate was much lighter than clay pigments.

Figure 4 represents a graph that illustrates the inverse relationship between the density of color inkjet printing and the speed of paint drying using different mixtures of micronized calcined clays.

Finely dispersed pigment provides the best packing of the particles and creates a higher covering power of the paint on the coating surface. A compromise solution is to win in the densities of the print, but at a lower speed paint drying. This interdependence also indicates that the optimization of the coating in order to achieve the best density and speed of paint drying requires a carefully what about the balance of the structure of the pores of the coating.

Example 2

The next series of experiments was conducted to compare the characteristics of the print achieved with use of the surface-treated pigments of the type UFGCC.

Table 2 lists four different types of cationic materials that were used for the surface treatment of four different respective samples of ultrafine ground calcium carbonate (UFGCC), which were measured and are shown color-density ink-jet printing. Shown here are data obtained when a surface treatment using a 2 wt.% cationic agent in the environment for surface treatment, in which were dispersed particles of GCC. For treatment of one of the samples UFGCC was used ASN, while the other three samples were processed by one of several types policywatch amines, which were AGEFLOC B50LV manufactured by Ciba Speciality chemical water treatment Ltd., 261LV manufactured by Nalco, and CP-2.

Used UFGCC was an industrial product Hubercarb FG-1, manufactured by J.M.Huber Corporation. This material was obtained by melting GCC dissolvere 5 h.p. Cowless dissolver (Model W-14-2), Design Ine. The sample was dissolved in a 15-inch square containers to which was added water, and then added UFGCC in a quantity sufficient to achieve a 30% solid material. After the mixture is stirred 20 min at 300 rpm Then to the mixture was slowly added ready 8%ASN, continuing the stirring at low speed (about 1500 rpm). In a similar manner to this sample was added policestation amines. The mixing speed was again raised to 3000 rpm and mixed material for an additional 60 min, after which it was dried by atomization in the spray dryer Niro Sparay Dryer.

Prepared in the laboratory the samples of paper with a matte finishing coating was obtained using each of the different surface processed using the method described in example 1, UFGCC-pigments, and then were used for printing on an inkjet printer HP model 829 Cse. The printer was installed on the normal print speed.

Table 2
Cation-treated UFGCCThe print density
YellowMagentaBlueBlackComposite

(W+P+G)
2% CP-2/UFGCC0,931,281,371,623,57
2% 261LV/UFGCC0,921,331,401,58of 3.64
2% ACH/UFGCC0,841,19 1,301,483,33
2% Agefloc B50LV/UFGCC0,851,24of 1.341,523,43

When comparing tables 1 and 2 it can be noted that all cation-treated pigments have much higher densities of colored paints compared to untreated pigments. The cationic material is considered as an essential ingredient of papers for inkjet printing both coated and uncoated. Table 2 also shows that UFGCC processed ASN, gives a slightly lower, but comparable and effective density of inkjet printing, however, its advantages in terms of cost and efficiency charge make it the preferred reagent for treatment of the pigments of the coating type UFGCC.

Example 3

In another series of experiments was experimentally studied the effect of dosage of ASN-cationic material to the density of the printed colors and the speed of paint drying.

Digital printing was performed in the same manner as described in the previous examples, and the results of color printing are summarized in the following table 3.

Table 3
% ASN when processingThe density of the printed color is in
YellowMagentaBlueBlackComposite

color (W+P+G)
40,691,011,121,562,82
60,691,031,141,592,85
80,731,081,251,653,06
120,811,131,281,623,22
160,891,201,291,633,39

As can be seen from the results of table 3, when the number of ASN in the pigment increases, the density of the printed color coated paper increased proportionally. High density color is one of the key parameters for quality inkjet printing along with printing resolution, blurring paint, leaking one color to another and the speed of paint drying. To achieve the highest quality inkjet printing in General, we can empirically to optimize the dosage of ASN, and to reduce the cost of the ASN can be mixed with other polymers.

Example 4

The purpose is to zyczenia achieve different coating compositions, including ASN - surface-treated pigment UFGCC conducted an additional series of experiments, after which the tests were performed on the print quality by comparing different from the above-mentioned compositions for coating a commercially available inkjet paper with matte finish.

UFGCC was obtained from Fairmont (GA) in the form of dry redispersion ultrafine ground calcium carbonate (UFGCC). The average particle size of the pigment was close to 1.5 microns. Figure 5 shows the distribution of particle size UFGCC measured on the classification of particles Malvem after described in this example, the processing surface using the ASN.

Operations of receipt of such processed product began with the opening of the suspension in the water. Raw UFGCC mixed with water in a mixing tank under mild stirring using a trapezoidal blades to achieve 30% pigment solid material. Then stir the mixture gently add the hydrochloride of aluminum (activity 50%). Continue stirring while adding the ASN to the aqueous suspension of the pigment may cause slight initial flocculation of the pigment. However, these soft cereal very quickly shattered with stirring.

Were undertaken in the laboratory attempts to improve the content of solid material in suspension in water UFGCC, however, arose gel is education, i.e. had a higher degree of coagulation and mixing process could not continue due to the rapid increase of the viscosity. This attempt also explained that the suspension of ASN - treated pigment UFGCC with a high content of solid material cannot be obtained by simply adding the ASN to the aqueous slurry of raw UFGCC with a high content of solid material. Alternatively, it was found that ASN can be added to the fluid, to which was added dry pigment. In yet another alternative method, the cationic polymer may be used initially for dispersing the pigment, after which can also be added ASN. The cationic polymer was epichlorohydrin-polyamine. Can also be used polymers of DADMAC or other Quaternary polyamine.

The suspension is treated pigment UFGCC dried in the spray dryer to the state of a dry powder. The slurry may be dried using the method of instantaneous evaporation in a suitable equipment for drying instant evaporation.

Color coatings for ink jet printing was prepared as follows.

To create a color coating ASN - processed UFGCC can be diluted to a suspension of 60% solid material. To form a color coating for inkjet printing to suspension add other ingredients the ocrite, such as a binder, a viscosity modifier, a fluorescent Brightener and a crosslinking agent. When designing color coating requires additional caution because positively charged pigment, such as processed UFGCC, can be neutralized through negatively charged ingredients, such as binders, agent insolubility and optical bleach. On the basis of laboratory tests by mixing dilute solutions of ASN with each of the ingredients of the coating was installed that are compatible starches to cover, such as PG290 and binder based on polyvinyl alcohol. A large part of the butadiene latexes are slightly incompatible, however, other types of latexes, such as vinyl acetate and venerability incompatible. A crosslinking agent type Outlook addon is not compatible with ASN, leading to adverse deposition of the coating. Incompatible ingredients of the coating should not be used in the coating composition, as in this case happens flocculation education Pechorsky units. In some cases there was a sharp jump in viscosity, making the mixing impossible. To avoid the sudden increase of the viscosity immediately after the addition of starch requires adding a styrene-butadiene latexes.

Following compositions 1, 2 and 3 are what reamers of different compositions of coatings, using the surface-treated pigments of the present invention, which was used for the matte finished coated papers for ink jet printing.

The composition of the coating 1: composition of the matte coating for inkjet printers
UFGCC treated with 8%ASN100 pieces
Cationic polymer (PRP2550)16.8 parts
ASN (˜50% solid material)13 parts
A crosslinking agent (Cartabond TSI)1-2 part
Dimer of alkylbetaine (AKD) (Raisofob8105)1 piece
Styrene-butadiene (SB) latex (Dow 383NA)6 pieces
Polyvinyl alcohol (PVA) (Airvol 205)6 pieces
only 144 pieces
Note: 1 part = 1 gram of dry material. ASN is a commercial product Summit ASN-3.

The pigment suspension and the following ingredients had the following content of solid material in the respective dispersed forms that were used in the composition of the coating 1: pigment suspension of 60%; cationic polymer solid 50%; ASN solid 50%; solid material Cartabod TSI solid 45%; AKD (cationic sizing agent) solid 50%; styrene-butadiene latex solid 50%; PVA solid 20%.

The composition of the coating 2: composition of the matte coating for inkjet printers
UFGCC treated with 8%ACH100 pieces
Cationic polymer (PRP2550)16.8 parts
ASSN19.5 parts
A crosslinking agent (Cartabond TSI)1-2 part
AKD (Raisofob8105)1 piece
The polyvinyl acetate (Airflex7200)12 parts
PVA (Airvol 205)4 pieces
only 155 parts
Note: 1 part = 1 gram of dry material.

The pigment suspension and the following ingredients had the following content of solid material in the respective dispersed forms that were used in the composition of the coating 2: pigment suspension of 60%; cationic polymer solid 50%; ASN solid 50%; Cartabond TSI solid 45%; AKD (cationic sizing agent) solid 50%; PVAc (Airflex 7200) solid 72%; PVA solid 20%.

The composition of the coating 3: composition Mat pok is itia inkjet
UFGCC treated with 8%ASN100 pieces
Cationic polymer (PRP2550)16.8 parts
ASSN19.5 parts
A crosslinking agent (Cartabond TSI)1-2 part
AKD (Raisofob8105)1 piece
The polyvinyl acetate (Airflex7200)12 parts
only 154 parts
Note: 1 part = 1 gram of dry material.

The pigment suspension and the following ingredients had the following content of solid material in the respective dispersed forms that were used in the composition of the coating 3: pigment suspension of 60%; cationic polymer solid 50%; ASN solid 50%; Cartabond TSI solid 45%; AKD solid 50%; PVAc (Airflex 7200) solid 72%; PVA solid 20%.

In the manufacture of finished matte coated paper for inkjet printing for applying coatings and finishes should be used very light base sheet with a small internal sizing. Depending on the smoothness of the sheet typical recommended coating weight ranges from 16 to 20 g per 1 m2for one side. To fully close over a smooth base sheet requires less floor, while the coarse sheet tre is : more coverage. The color of this coating can be selected for different types of knives, air knife or roller installation for coating, etc.

In order to enhance the smoothness of the finished sheet may be used weak calendering of the coated sheet, however, excessive calendering is strongly discouraged, as it will lead to a decrease in the speed of drying paint, which can be erase paint or bleeding colors.

The test print is covered in the laboratory samples of paper were carried out on a color inkjet printer HP, model 820 Cse, and the printer Epson stylus 1270. The method of printing was set at normal print speed, normal quality printing on photo paper. Coverage (if applying) were applied to the base paper using a round wire rod with respect to the magnitude of the applied weight of approximately 10 g/m2.

Table 4 presents the results of inkjet printing for the industrial manufacture of the sheet for inkjet printing photographic quality with a matte finish (C1) using silica pigment, which was obtained from a commercial warehouse service. Table 4 presents the results for coated paper 1 ("1"), which was used representing the present invention processed ASN pigmentation treatment is NT to cover UFGCC. Used in the coated paper 1 paper base was a plain paper for copying (i.e. a 24-inch (605 mm) paper manufactured by the Weyerhaeuser Corporation), and used the composition of the coating was described above, the coating composition 1. Used processing surface UFGCC and Protocol of the coating were the same as those described in the above example 3.

In the following tables and examples just listed the grades relate to their samples, which has not been subjected to the coating described in these examples, compositions, while the enumeration of the compositions of the coating means samples obtained by applying the listed songs on standard copy paper (60-80 g/m2that has not been subjected to any surface treatment before applying it to the experimental coating).

Table 4

Comparison of model with experimental coating and industrial manufacture of coated paper for inkjet printers
HP 820 CseEpson stylus 1270
Matte paperBlueMagentaYellowBlackComposition is th BlueMagentaYellowBlackComposite
The composition of the coating 11,361,401,131,603,891,551,421,001,403,97
C11,581,551,141,354,271,661,481,081,314,22

The results in table 4 show that the matte paper coated with a coating composition containing UFGCC, surface treated with ASN, has good characteristics color printing, comparable with the characteristics of the industrial manufacture of coated paper, which uses relatively expensive silica pigment with a low solid content material.

Print quality can strongly influence the design of the inkjet printer. Printers vary in types of paint, printer speed, the algorithm amplification of image formation and the size of the droplets. Printer Epson stylus 1270 is faster colour inkjet printer with a print head that moves in both directions. Higher speed demands much of the paint drying.

the example 5

In another series of experiments was repeated the Protocol described in example 4, then digital printing is done in the same way as described in the previous examples, except that color printing in this case was made to be used as industrial manufacture of paper inkjet paper photo quality company Epson, HP Bright white light-white) or Epson Premium Bright white (light white), as well as printing devices used printers NRS Deskjet printer and Epson Stylus Photo 1270. To assess the influence of coating compositions printed on quality paper, separate samples were obtained by drawing on standard paper Copy paper each of the compositions 1, 2 and 3. The results of color printing are collected in the following table 5.

Table 5
HP1220C DeskjetEpson Stylus Photo 1270
BlackBlueMagentaYellowCompositeBlackBlueMagentaYellowComposite
The inkjet paper Epson photo quality1,56of 1.341,591,134,06 1,56of 1.341,591,134,06
The composition of the coating 11,581,271,431,103,801,581,271,431,103,80
The composition of the coating 21,671,211,451,133,791,671,211,451,133,79
The composition of the coating 31,671,251,361,06to 3.671,671,251,361,06to 3.67
HP Bright White light-white)1,561,091,270,983,341,561,091,270,983,34
Epson Premium Bright White light-white)1,541,191,281,003,471,541,151,271,013,43

Example 6

In another series of experiments was repeated the Protocol described in example 4, then digital printing is done in the same way as described in the previous examples, except the fact you used a coating weight of approximately 2 g/cm 2that color printing is done on paper (base paper) HP Bright white Photo quality Inkjet paper (light white inkjet photo quality) or Epson Premium Bright White paper (light white), as well as printing devices used printers NRS HP1220C Deskjet and Deskjet. The results of color printing are collected in the following table 6.

Table 6
SampleNRS DeskjetHP1220C DeskJet
BlackBlueMagentaYellowCompositeBlackBlueMagentaYellowComposite
HP Bright white1,511,171,190,883,241,601,101,110,833.04 from
Epson Premium Bright1,291,281,270,923,471,521,251,230,853,33
Copy Paper1,101,101,130,863,091,491,081,090,79 2,96
Floor 51,531,261,270,913,441,541,221,220,893,33
Floor 41,551,301,250,963,511,581,251,230,903,38

The coating composition 4 (component/parts)
UFGCC treated with 8%ASN100
TRAMFLOC F8648
Quaternary amine Carbarond TSI
(50% solid material)3
Airvol 203 (PVA)7,2
The coating composition 5 (component/parts)
UFGCC processed 17%ASN100
TRAMFLOC F8646,8
Quaternary amine Carbarond TSI
(50% solid material)1,9
Airvol 203 (PVA)6,1

Example 7

In another series of experiments to study the influence of the time factor when adding a cationic polymer and surface treatment p is mentov on the viscosity and thixotropy properties of the pigment compositions there were prepared three separate pigment compositions in accordance with various schemes added. This was done following various operations. Operation 1 in General corresponded to the flowsheet shown in figure 2, in which the pigment (UFGCC) before his connection with a cationic polymer (TRAMFLOC 864) surface was treated with a salt of polyvalent metal (ASN). Step 2 were generally consistent with the process scheme shown in figure 3, in which the raw pigment was mixed with a cationic polymer before processing of pigments using ASN. In comparative operations And ASN and cationic polymer are simultaneously added and mixed with the suspension of the pigment. The speed of adding the cationic polymer to the pigment in these operations was 55 cm3/min/50 g of the pigment. For these operations, the pigment UFGCC surface was treated with 8%ASN as described in the previous example 4. In these compositions did not include any other ingredients. Table 7 presents the results of the viscosity obtained at two different speeds and the values of the content of solid material in which the above various compositions possible gelation would not result in too high viscosity.

Table 7
ExperienceThe viscosity Brookfield% of solid material
20 rpm100 rpm
The composition operation 1215066055,7
The composition operation 23878113048,1
Composition operations And355094038,7

As illustrated by the above examples, the method of obtaining used as a pigment ultrafine ground calcium carbonate treated with the hydrochloride of aluminum was experimentally implemented successfully. This method of processing UFGCC according to the present invention is simple because it requires only a simple high-power mixer with the function of drying the material prior to its sale. This kind of special material GCC in conjunction with the processing of ion polyvalent metal when used in the coating of the high content of solid material and a low content of binder is extremely important to obtain coatings with a high content of solid material and improves basic printing properties, such as density of printing ink, the printing resolution and the resistance. Was pok is connected, treated hydrochloride aluminum UFGCC is an effective pigment for coating, can replace the silica pigment. It also reduces to a minimum the problem of dust arising from the application of silica, and avoids the complex process of preparation of the coating. Processed using ASN UFGCC increases the solids content of the material to the final color coating to 45 wt.% or higher, and even up to 50 wt.% or higher. Thus, it ensures the feasibility of other coating methods using a device with a doctor blade coating, spray device for coating and the like, which allows matte paper and other types.

It should be borne in mind that, without departing from the principles of the invention and not going beyond its limits, defined in the following claims professionals may make various changes in the details, materials and arrangement of parts which have been described and illustrated in the application to explain the essence of the invention.

1. Pigment suitable for use in the compositions of the coating of the recording medium for ink comprising pigment bulk material having a treated surface, the resulting contact is made between the surface of the pigment with puchero material and a water-soluble salt of the polyvalent metal in the aquatic environment, the resulting treated surface becomes cationic surface charge, while salt is a salt of a metal of group II or group III of the Periodic table and pigmented granular material selected from the group consisting of calcium carbonate, the three-hydrate of aluminum and magnesium hydroxide, used separately or in combination.

2. The pigment according to claim 1, in which the pigment bulk material is a ground calcium carbonate (GCC).

3. The pigment according to claim 1, in which the pigment bulk material consists of precipitated calcium carbonate (PCC).

4. The pigment according to claim 1, in which the pigment bulk material consists of particles of calcium carbonate having a specific surface area of less than 15 m2/year

5. The pigment according to claim 1, in which a water-soluble salt of polyvalent metal is a hydrochloride of aluminum.

6. The pigment according to claim 1, in which the surface treated pigment bulk material is in the form of dried powder.

7. The method of preparation of the pigment composition for a recording medium for ink, including

i) mixing the pigment granular material and water-soluble salts of polyvalent metal, providing contacting the water-soluble salts of polyvalent metal surface pigmented granular material with the formation of the surface treatment is otango pigmented granular material, having on the surface a cationic surface charge, where salt is a salt of a metal of group II or group III of the Periodic table;

ii) mixing in an aqueous composition of surface-treated pigment bulk material with a cationic polymer comprising Quaternary amine compound.

8. The method according to claim 7, in which the mixing is the mixing of aqueous suspension of pigment bulk material with a water-soluble salt of the polyvalent metal.

9. The method according to claim 7, in which the mixture is a dry mixture of pigmented granular material with particles containing a water-soluble salt of polyvalent metal.

10. The method of preparation of the pigment composition for a recording medium for ink, including

a) preparing a first slurry containing loose pigment material dispersed in the aquatic environment;

b) addition of water-soluble salts of polyvalent metal to the first suspension when carrying out the mixing in the quantities and method providing a second slurry in which a water-soluble salt of polyvalent metal is in contact with the surface of the inorganic granular material with the formation of surface-treated pigment bulk material having on the surface a cationic surface is a grave charge, where salt is a salt of a metal of group II or group III of the Periodic table;

c) mixing the second suspension containing surface-treated pigment bulk material and the cationic polymer is a Quaternary amine compound in an aqueous medium with the formation of the pigment composition.

11. The method according to claim 10, in which the pigment compositions contain from about 45 to about 70 wt.% surface treated inorganic granular material.

12. The method according to claim 10, in which the cationic polymer is an epichlorohydrin-polyamine.

13. The method according to claim 10, in which the inorganic granular material added to the first slurry in an amount of from about 1 to about 30 wt.%.

14. The method according to claim 10, in which the inorganic granular material added to the first slurry in an amount of from about 20 to about 30 wt.%.

15. The method according to claim 10, in which the salt of polyvalent metal is added to the second suspension in an amount of from about 1 to about 30 wt.%.

16. The method according to claim 10, in which the salt of polyvalent metal is added to the second suspension in an amount of from about 3 to about 20 wt.%.

17. The method according to claim 10, further comprising drying the second slurry to such an extent as to obtain a powder consisting of a surface-treated pigment bulk material is.

18. The method according to claim 10, in which the pigment bulk material contained in the first slurry, which are selected from the group consisting of ground natural calcium carbonate, precipitated calcium carbonate, three-hydrate of aluminum, kaolin and magnesium hydroxide, used separately or in combination.

19. The method according to claim 10, in which the inorganic granular material contained in the first slurry consisting of calcium carbonate, a salt of polyvalent metal is a hydrochloride of aluminum.

20. The method according to claim 10, in which the pigment bulk material consists of particles of calcium carbonate having a surface area less than 15 m2/year

21. The method of preparation of the pigment composition for a recording medium for ink, including

1) mixing the pigment bulk material with a cationic polymer comprising Quaternary amine compound, with the formation of the first suspension;

2) connection of the first suspension with a water-soluble salt of the polyvalent metal in the implementation of mixing, ensuring the formation of the second suspension, in which a water-soluble salt of polyvalent metal is in contact with the surface of the pigment bulk material with the formation of surface-treated pigment bulk material having on the surface a cationic surface charge, the state Duma of the second slurry contains salt, represents a salt of a metal of group II or group III of the Periodic table, and where the second slurry contains at least about 45 wt.% mentioned surface-treated pigment of the bulk material.

22. Aqueous coating composition for recording medium for ink jet printing comprising an aqueous suspension of pigment granular material and a binder in which the pigment bulk material is processed surface obtained as a result of contact made between the surface of the pigment bulk material and a water-soluble salt of the polyvalent metal in the aquatic environment before the introduction of pigmented granular material in suspension, where the treated surface has a cationic surface charge, salt is a salt of a metal of group II or group III of the Periodic table and a binder is a material selected from anionic binder and a nonionic binder.

23. The coating composition according to item 22, in which the pigment bulk material consists of calcium carbonate, salt of polyvalent metal is a hydrochloride of aluminum, and a binder selected from styrene-butadiene rubber, starch, polyvinyl acetate, acrylic polymer and polyvinyl alcohol, used separately or in combination.

24. The coating composition according to item 22, in which toroi pigmented granular material consists of particles of calcium carbonate, having a specific surface area of less than 15 m2/g, salt of polyvalent metal is a hydrochloride of aluminum, and a binder selected from styrene-butadiene rubber, starch, polyvinyl acetate, acrylic polymer and polyvinyl alcohol, used separately or in combination.

25. The coating composition according to item 22, in which the composition contains (calculated on dry substance) of surface-treated pigment bulk material in an amount of from about 45 to about 70 wt.%.

26. The coating composition according to item 22, in which the binder consists of anionic binder in an amount of from about 5 to about 12% by weight of the composition, the cationic polymer is a Quaternary amine compound in an amount of from about 5 to about 15 wt.% (calculated on dry substance).

27. The coating composition according to item 22, applied by squeegee, roller, tape gruntovaya, dosing press, atomizer, air scraper or other devices for applying a continuous coverage of a large area.

28. The recording medium for ink received by the application as a coating at least on one side of the medium composition coating on p.22.

29. The recording medium for ink according p, where a sheet of recording medium is an inkjet paper.

30. The recording medium for ink is on p, where the sheet of recording medium is an inkjet paper with matte finish.



 

Same patents:

FIELD: special compositions.

SUBSTANCE: invention relates to compositions used in preparing heat-protective covers based on silicon-containing ceramic hollow microspheres and able to withstand strong temperature drops. Composition for preparing heat-protective cover comprising hollow ceramic microspheres as a filling agent, a polymeric binding agent, technological additive and water involves hollow ceramic microspheres of specific mass 450-750 kg/m3, hardness value by Mohs scale 5.0-6.0 as a filling agent and in the following distribution of particles by sizes, wt.-%: basis diameter 250-350 mcm, 30-62; diameter 5-10 mcm, 15.0-20.0; diameter 10-30 mcm, 5.0-30.0; diameter 30-50 mcm, 5.0-30.0; diameter 60-100 mcm, 8.0-10.0; diameter 100-250 mcm, 5.0-10.0; as a polymeric binding agent the composition comprises latex chosen from group involving: modified acryl acetate latex, 33-38% latex of copolymer of butadiene, acrylonitrile and methacrylic acid, copolymer of styrene and n-butyl acrylate in the ratio 1:1 by mass; as a technological additive the composition comprises a froth breaker chosen from group comprising: silicon froth breakers, tributyl phosphate, polyester derivatives of fatty acids in the following ratio of components, wt.-%: abovementioned microspheres, 18-32; abovementioned froth breaker, 0.01-1.0; abovementioned binding agent, 8.0-12.0, and water - up to 100. Invention provides expanding assortment of compositions for preparing heat-protective covers, enhancing heat-protecting, heat-physical indices of cover with high uniformity and cohesion strength of cover with a basis, expanding region of working temperature from -60°C to +260°C. Invention can be used in filed of building, machine engineering, aviation, railway transport wherein surfaces require conferring heat-protective properties in exploitation of covers under rigid temperature conditions.

EFFECT: improved and valuable technical properties of composition.

2 tbl

FIELD: chemical industry; printing industry; other industries; methods of production of the composition of the paint including the optically changeable pigments.

SUBSTANCE: the invention may be used in production of the optically changeable pigments. The optically changeable pigment includes the stratified set composed of the different materials, in which, at least, one of the layers represents the reflecting layer and, at least, one of the other layers represents the dielectric layer. At least, one of the surfaces of the indicated layers is subjected to the chemical action. The indicated materials also include, at least, one of the layers, which represents the semitransparent metallic layer made out of chromium and also one or more metals and-or their inorganic compounds. At that the metal and-or its inorganic compound are subject to corrosion. The subjected to the chemical action surface of the reflecting and dielectric layer along the edge of the layering block of the edge structure of the pigment is coated with the passivating agent, which is selected from the group consisting of the organic esters and the fluorinated organic esters of the phosphoric acid, having the following structural formula: (Rf-CH2-CH2-O)xP(O)(OH)y, where Rf=F-(CF2-CF2)z, х=1 or 2, у=2 or 1, х+у=3, z=l-7. The composition of the printing paint includes the binding system, water and the optically changeable pigment. The invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

EFFECT: the invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

22 cl, 7 ex

FIELD: marking and identification of protected articles, such as bank-notes, service papers, labels, foil, fiber, card or industrial products.

SUBSTANCE: proposed printing ink contains dyes or pigments of expanded or hyperchromatic color space which is not reproduced by means of standard 4-color reproducing equipment. Identification of marking includes mathematical conversion of non-processed spectral information into statically independent hyperchromatic coordinates and comparison of selected hyperchromatic coordinates with respective standard magnitudes. Specification gives also description of printing inks and method of marking and identification of articles.

EFFECT: enhanced efficiency.

25 cl, 6 dwg, 2 tbl, 4 ex

FIELD: marking and identification of protected articles, such as bank-notes, service papers, labels, foil, fiber, card or industrial products.

SUBSTANCE: proposed printing ink contains dyes or pigments of expanded or hyperchromatic color space which is not reproduced by means of standard 4-color reproducing equipment. Identification of marking includes mathematical conversion of non-processed spectral information into statically independent hyperchromatic coordinates and comparison of selected hyperchromatic coordinates with respective standard magnitudes. Specification gives also description of printing inks and method of marking and identification of articles.

EFFECT: enhanced efficiency.

25 cl, 6 dwg, 2 tbl, 4 ex

FIELD: polymer production.

SUBSTANCE: invention relates to production of polymeric binders for toner and can be used for copying appliances and printers. Process comprises separate preparation via emulsion polymerization of (i) low-molecule weight copolymer of styrene (α-methylstyrene), 2-ethylhexyl acrylate (or butyl acrylate) and methacrylic acid at monomer weight ratio (88-91.5):(8-11):(0.5-1.0) with intrinsic viscosity in toluene 0.08-1.2 dL/g and (ii) high-molecule weight copolymer of styrene (α-methylstyrene) and 2-ethylhexyl acrylate (or butyl acrylate) at monomer weight ratio (88-92):(8-12) with intrinsic viscosity in toluene 1.0-1.28 dL/g. In both cases, polymerization is carried out at 60-70% to monomer conversion close to 100%. Resulting latexes of low- and high-molecule weight copolymers are supplemented by stopper and antioxidant and then mixed with each other at "dry" weight ratio between 70:30 and 75:25 and coagulated intrinsic viscosity in toluene 1.0-1.28 dL/g. with electrolyte solutions to form polymer characterized by intrinsic viscosity in toluene 0.4-0.45 dL/g and polydispersity Mw/Mn, which ensures bimodal molecular weight distribution of copolymer. The latter has melting (spreading) point 125-137°C and softening temperature 70-75°C.

EFFECT: improved quality of electrographic printing.

2 cl, 1 tbl, 4 ex

FIELD: chemical industry; methods of production of the coatings with the strong adhesion.

SUBSTANCE: the invention is pertaining to the method of production of the coatings with the strong adhesion on the inorganic or organic substrate, which provides, that one inorganic or organic substrate is subjected to the treatment with the low-temperature plasma, the corona discharge or the treatment with the gaseous flame, at the normal atmospheric pressure deposit on the inorganic or organic substrate one or several photoinitiating agents or the mixtures of the at least one ethylene- unsaturated with the monomers and-or the oligomers containing at least one ethylene- unsaturated group, or the solutions, suspensions or emulsions of the above indicated substances using the suitable methods; the above indicated substances are not necessary subjected to drying and-or to the electromagnetic irradiation; and either on the preliminary so treated substrate deposit the composition including at least one ethylene- unsaturated monomer or the oligomer and the coating is subjected to hardening under action of the UF/ the visual rays emission or the electron beam; or on the substrate with such a preliminary coating made out of the photoinitiating agent they apply the printing ink coating and dry it. The method has the high efficiency and allows to produce the coating with the good adhesion and is suitable for to production of the products made out of the various plastics materials and-or metals or the glass types with the coatings having the good adhesion.

EFFECT: the invention ensures the high efficiency of the method, production of the highly adhesive coatings suitable for manufacture of the products made out of the various plastics materials, metals or the glass types.

18 cl, 19 ex

FIELD: chemical industry; polygraphy; methods of the stencil printing.

SUBSTANCE: the invention is pertaining to the paint suitable for the stencil printing inside the pressurized castings. The invention describes the paint suitable for the printing films made out of the transparent thermoplastic, consisting predominantly of: a) one or several pigments; b) the binding in the solution in c) the organic solvent or in the mixture of the organic solvents, d) the routine auxiliary materials, if it is desirable, at that as the binding use the copolymer of the poly-(metha)-acrylate containing (м1) from 50 up to 90 % to the mass of alkylmethacrtlate having from 1 up to 6 atoms of carbon in the ethereal radical; (м2) from 5 up to 25 % to the mass, at least, one vinylaromatic compound; (м3) from 1 up to 25 % to the mass of maleic anhydride, and if it is desirable, (м4) from 0 up to 5 % to the mass of the alkylacrylate having from 1 up to 6 atoms of carbon in the ethereal radical or the copolymer of the poly-(metha)-acrylamide containing polymethylmethacrylate with the degree of imidization from 65 up to 80 %, to 1 up to 15 mass % of methacrylic acid and from 1 up to 15 mass % of methacrylic anhydrade. At that the indicated copolymer has the softening temperature by VIKA (ISO 306 B) at least of 115°С. As the dissolvents use aliphatic, cycloaliphatic and aromatic hydrocarbons, ketones, esters, ethers, alcohols, phenoles or their mixtures. The invention also describes the film made out of the thermoplastic printed by the above described paint; the pressurized casting consisting of the film made out of the thermoplastic printed on the opposite side with the above described paint and supplied on this side with the layer of the thermoplastic coating. At that the indicated layer is applied by the operation of pressure die casting on the inside and at that the film and-or the plastic material for operation of the pressure die casting on the inside represents the copolymer of polymethylmethacrylate; and the method of production of the pressurized castings includes the following stages: a) stencil printing of the thermoplastic films by the above described method, b) the film molding, c) the pressurized castings on the inside on the stencil printed film side in the casting mould with the thermoplastic, and d) removal of the pressurized casting from the casting mould. The technical result of the invention: the paint is resistant to the action of the high pressures and temperatures during the operation of the pressurized casting on the inside, the image stencil printed by the paint has the stable color after long-term action of the atmospheric conditions.

EFFECT: the invention ensures, that the paint is resistant to the action of the high pressures and temperatures during the operation of the pressurized casting on the inside, the image stencil printed by the paint has the stable color after the long-term action of the atmospheric conditions.

6 cl, 1 tbl

FIELD: printing dyes.

SUBSTANCE: invention relates to concentrate of printing dyes and a method for its preparing. Invention describes dye concentrate for offset printing in form non-sticky granules covered by envelope and/or non-sticky granules without envelope with the pigment content in its 45-65 wt.-%. Envelope-cover consists of powder-like solid materials, wax or liquid materials, for example, oil. Also, invention describes a method for preparing indicated concentrate that involves grinding dye concentrate for offset printing and its covering by envelope wherein covering by envelope is carried out by direct applying powder-like solid material on the printing dye concentrate and wherein powder-like solid materials are combined firstly with liquid carrier followed by its evaporation, or solid envelope is prepared by applying melted material useful for coating. Invention provides decreasing viscosity and stickiness of the printing dye concentrate and allows simple transporting and simple mixing with additional components.

EFFECT: improved and valuable properties of concentrate.

9 cl, 12 ex

FIELD: dyes.

SUBSTANCE: invention relates to composition of aqueous dye used in stenciling, to a method for preparing indicated composition of stenciling, using indicated dying composition for stenciling and to securities printed using indicated dying composition. Invention describes composition of aqueous dye for stenciling containing the following components: (a) emulsion of acrylic or urethane-acrylic copolymer taken in the amount 30-70 wt-%, preferably in the amount 35-60 wt.-%, and more preferably in the amount 40-55 wt.-% of self-cross-linking emulsion of acrylic or urethane-acrylic copolymer as measured for the total mass of composition; (b) cross-linking agent taken in the amount 0.25-3 wt.-%, preferably in the amount 0.5-2 wt.-%, and more preferably in the amount 1-2 wt.-% of mass indicated cross-linking agent as measured for the total mass of composition; (c) optional catalyst; (d) optional pigments, and (e) optional additives and wherein indicated cross-linking agent comprises at least two different functional activity in a single molecule. The first functional activity is chosen by so manner to form a covalent bond with indicated polymer before printing and the second of indicated functional activities is chosen by so manner to carry out cross-linking indicated polymer for hardening printed dye. Emulsion of acrylic or urethane-acrylic copolymer is chosen from group possessing self-cross-linking property and wherein the composition shows pH from 7.0 to 8.5, preferably from 7.5 to 8.3 and more preferably from 7.5 to 8.0. Invention describes a method for preparing above said composition of aqueous dye for stenciling and comprising the following steps: (a) preparing emulsion of acrylic or urethane-acrylic copolymer; (b) optional preparing catalyst, optional pigments and optional additives; (c) preparing a cross-linking agent able to form a covalent bond under the first conditions with polymer prepared in (a), and cross-linking prepared polymer under the second conditions; (d) thorough mixing components prepared by points (a), (b) and (c) and providing interaction of polymer prepared by point (a) with a cross-linking agent prepared by point (c) under indicated first conditions; (e) regulation of pH value of the composition in the range from 7.0 to 8.5. Also, invention describes using the indicated composition of aqueous dye as a dye for stenciling and security document with signs printed by using indicated composition of aqueous dye. Proposed composition shows improved stability and improved toxicological properties in the combination and excellent stability of printed and hardened dye to chemical and physical effects.

EFFECT: improved properties of dye, improved preparing method.

14 cl, 6 ex

FIELD: dyes.

SUBSTANCE: invention relates to composition of aqueous dye used in stenciling, to a method for preparing indicated composition of stenciling, using indicated dying composition for stenciling and to securities printed using indicated dying composition. Invention describes composition of aqueous dye for stenciling containing the following components: (a) emulsion of acrylic or urethane-acrylic copolymer taken in the amount 30-70 wt-%, preferably in the amount 35-60 wt.-%, and more preferably in the amount 40-55 wt.-% of self-cross-linking emulsion of acrylic or urethane-acrylic copolymer as measured for the total mass of composition; (b) cross-linking agent taken in the amount 0.25-3 wt.-%, preferably in the amount 0.5-2 wt.-%, and more preferably in the amount 1-2 wt.-% of mass indicated cross-linking agent as measured for the total mass of composition; (c) optional catalyst; (d) optional pigments, and (e) optional additives and wherein indicated cross-linking agent comprises at least two different functional activity in a single molecule. The first functional activity is chosen by so manner to form a covalent bond with indicated polymer before printing and the second of indicated functional activities is chosen by so manner to carry out cross-linking indicated polymer for hardening printed dye. Emulsion of acrylic or urethane-acrylic copolymer is chosen from group possessing self-cross-linking property and wherein the composition shows pH from 7.0 to 8.5, preferably from 7.5 to 8.3 and more preferably from 7.5 to 8.0. Invention describes a method for preparing above said composition of aqueous dye for stenciling and comprising the following steps: (a) preparing emulsion of acrylic or urethane-acrylic copolymer; (b) optional preparing catalyst, optional pigments and optional additives; (c) preparing a cross-linking agent able to form a covalent bond under the first conditions with polymer prepared in (a), and cross-linking prepared polymer under the second conditions; (d) thorough mixing components prepared by points (a), (b) and (c) and providing interaction of polymer prepared by point (a) with a cross-linking agent prepared by point (c) under indicated first conditions; (e) regulation of pH value of the composition in the range from 7.0 to 8.5. Also, invention describes using the indicated composition of aqueous dye as a dye for stenciling and security document with signs printed by using indicated composition of aqueous dye. Proposed composition shows improved stability and improved toxicological properties in the combination and excellent stability of printed and hardened dye to chemical and physical effects.

EFFECT: improved properties of dye, improved preparing method.

14 cl, 6 ex

FIELD: chemical and pulp-and-paper industry.

SUBSTANCE: aqueous suspension of at least one filler or mineral contains natural carbonate, polymeric dispersing agent as stabilizer of suspension viscosity, product of natural carbonate treatment with gaseous CO2, and product of natural carbonate reaction with at least one medium or strong H3O+-donors, has pH more than 7.5 at 200C. As natural carbonate suspension contains calcium carbonate (e.g., marble, calcite, carbonate-containing dolomite, chalk, ore mixtures thereof with talcum, and/or TiO2, MgO, or other minerals inert to H3O+-donors). As H3O+-donors suspension contains H2SO3, HSO

-4
, H3PO4, oxalic acid or mixtures thereof in molar ratio to carbonate of 0.1-2. Used carbon dioxide under pressure of 0.05-5 bar may be added from outside, recycled or obtained by continuous H3O+-donors addition. Treatment with H3O+-donors and gaseous CO2 may be carriedout simultaneously or separately, wherein in the last case temperature and time of respective stages are 5-900C and 1-5 h. Claimed suspension is dried to obtain colorant. Colorant has BET specific surface of 5-200 m2/g according to ISO 9277 and mean grain size measured by sedimentation method of 0.1-50 mum. Colorants are used in compositions, as agent for paper lamination, for paper pulp filling, coloration, and board production. Obtained paper is useful in numeric and ink-jet printing.

EFFECT: paper with decreased mass at constant surface.

33 cl, 1 dwg, 2 tbl, 8 ex

The invention relates to the production of composite materials, in particular organic pigments that may be used in the manufacture of paints, enamels, colored cements and concretes, dry mixtures for coloring plastic Mac
The invention relates to methods for processing of inorganic materials in order to enhance their pigmenting properties, in particular to a method of surface treatment of titanium dioxide pigment

The invention relates to the production of synthetic pigments and can be used in chemical industry, building materials industry as a substitute for traditional pigments in the manufacture of paints, enamels, dry mixes, colored concrete, decorative concrete, ceramic, polymer, and rubber products

The invention relates to methods for vulcanization activators for the rubber industry

The invention relates to a process for the modification of inorganic fillers and pigments used in the manufacture of composite paints

FIELD: dyes and pigments.

SUBSTANCE: invention relates to a method for preparing an aqueous dispersion wherein water-insoluble dye is dispersed stable in an aqueous medium containing water and that is used as ink, respectively. Invention describes an aqueous dispersion comprising particles including water-insoluble dye and a polymeric compound or surface-active substance wherein its hydrophilic moiety is formed by at least one group taken among the group consisting of carboxyl, sulfonic, phosphorus, hydroxyl and alkylene oxide group. Particles are dispersed in water-containing medium and dispersion shows intensity of light scattering 30000 imp/s, not above, when it comprises sufficient amount of particles and to provides value of absorption peak with respect to visible light = 1 and particles give the same color as a water-insoluble dye in crystalline state. Also, invention relates to a method for its preparing involving the following stages: (1) preparing a solution containing water-insoluble dye and a dispersing agent dissolved in aprotonic water-soluble organic solvent in the presence of alkali; (2) mixing the solution with water and preparing the dispersion containing particles comprising water-insoluble dye and dispersing agent. Also, invention describes particles comprising water-insoluble dye and polymeric compound or surface-active substance wherein its hydrophilic moiety is formed by at least one group taken among the group consisting of carboxyl, sulfonic, phosphorus, hydroxyl and alkylene oxide group provides the same color as water-insoluble dye in crystalline state and having colored moiety with water-insoluble dye and non-colored moiety wherein non-colored moiety exists in the round region with radius 40 nm and wherein its center is the required point in a particle. Also, invention relates to a method for their preparing that involves the following stages: (A) preparing an aqueous dispersion; (B) formation of aggregate consisting of dispersion particles and isolation of aggregate from the dispersion; (C) conferring to particles in aggregate the capacity for repeated dispersing and wherein the stage (B) involves sub-stage of addition of acid to the dispersion to form aggregate, and the stage (C) involves sub-stage of treatment of aggregate with alkali to confer particle in aggregate the capacity for repeated dispersing, and ink containing particles described above. Proposed ink provides printing with excellent quality by color and clearness that are resistant to water and light.

EFFECT: improved preparing method, improved and valuable properties of dispersion and ink.

19 cl, 16 tbl, 1 dwg, 24 ex

The invention relates to the field of ink ribbon film basis, which are used in various types of printing devices percussion: dot matrix printers, typewriters with blade litererotica etc
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