Ink composition for inkjet printing

FIELD: printing industry.

SUBSTANCE: proposed ink composition for inkjet printing includes a polyurethane material having an average molecular weight of from about 50000 to about 500000, in an effective amount of from about 0.2 wt % to about 5 wt %. The composition also includes a solvent in an effective amount of from about 5 wt % to about 20 wt %, and an anionic surfactant in an effective amount of from about 0.01 wt % to about 3 wt %. Also a method of creation of this ink composition and an ink jet printing system, comprising a substrate and the indicated ink composition is provided.

EFFECT: proposed ink composition for ink jet printing provides improved readiness for publication in an open state.

6 cl, 3 tbl, 13 ex

 

The LEVEL of TECHNOLOGY

The present disclosure of the invention in General relates to ink compositions for inkjet printing.

Preparation of ink for ink-jet printing, which is capable of forming a solid film (for example, less lubricated marker to highlight text (HIGH Lighter and/or less amenable to dry abrasion), which also provide good reliability in operation and sustainable service to the injectors, was a difficult task. This may be due, at least partly, by the fact that the high molecular weight and/or hydrophobic binders used to achieve good resistance against smearing marker, can complicate throwing binders of the printhead inkjet printer. Polymers with high molecular weight may be due to the increased viscosity of the ink in the open nozzles. Hydrophobic binders may precipitate from solution and deposited on the resistors of the printheads. Both effects in some cases can break the ejection of droplets. Hydrophilic binders with a low molecular weight, which may be capable of achieving high levels of reliability, in General, provide minimal improvement in terms of resistance to smudge, highlighter and disgrace.

In this connection, it is desirable that a che is Niley composition for inkjet printing, which is essentially, while providing improved reliability of the printing element in the work and increased resistance to smudging marker, as well as high optical density, acceptable drying time and combinations thereof.

The INVENTION

Presents ink composition for inkjet printing. The composition includes a polyurethane material having a mass-average molecular weight in the range from about 50,000 to about 500,000. Polyurethane material is present in an effective amount ranging from about 0.2 wt. percent to about 5 wt. percent. The composition also includes a solvent present in an effective amount ranging from about 5 wt. percent to about 20 wt. percent, and anionic surfactant, present in an effective amount in the range from about 0.01 wt. percent to about 3 wt. percent. Ink composition for inkjet printing is adapted to be superior resistance to drying in the print head (ready for printing in an open state, decap).

DETAILED DESCRIPTION

Options ink composition for inkjet printing include polyurethanes of high molecular weight to reduce drying time and to increase resistance to smudging marker and disgrace in the wet state is on paper essentially without compromising the reliability of operation of the printing element or optical density. In one embodiment, the ink composition ensures a drying time for the test finger" less than about 10 seconds and settings lubrication marker, and package in the wet state is less than about 50 mOD (milli-Optical Density unit, the unit of optical density to evaluate the water resistance of the ink) on a smooth sheet of paper. In this embodiment, the ink composition provides the optical density of the black color higher than about 1.35.

Disclosed here, the ink compositions are also capable of providing improved performance ready for printing in an open state (decap), good stability print, a good performance injectors and reliability of the printing element. The term "decap", which is used here, refers to the ability of the ink for inkjet printing for easy ejection from the printing head in conditions of prolonged exposure to air. Ready time (decap) ink for printing in an open state is measured as the amount of time during which the ink print head can remain open before the nozzles of the printer will cease to properly produce the emission of potentially due to clogging or blockage. In General, the nozzle(s) may(may) be plugged/blocked due to the formation of a viscous tube, which is formed in the nozzle(Kakh) in the result clause is Teri water, crust formation of the ink and/or crystallization of the dye in any of the injectors or around it. If the nozzle becomes clogged, the ink droplets ejected through the nozzle of the injector, can deviate from the proper direction and may damage the print quality. The nozzle may also be completely blocked, and the ink droplets will not be able to pass through the clogged nozzle.

Times ready ink for inkjet printing to print typically measured short and long time periods. Intermittent readiness for printing in an open state in General determines how long the print head may be in an open state before the quality drops will deteriorate to below the quality achieved at viewskrytoi print head. The result of this decline in quality due to drying of ink in the print head, can be a variety of print/image. To counteract the effects of drying of the ink in the print head, the daily maintenance of the printer requires on a regular basis to make drawing ink in ceruloplasmin ("diaper") in order to avoid print defects. In order to provide a good quality printed image, at the same time maintaining or improving performance and saving mobile is, it is desirable to maintain short-term readiness for printing in an open state (decap) so long as possible, and to use pumping as rarely as possible, to clean the injectors. On the other hand, long-term readiness for printing in an open state determines how long the print head can be kept in the open state before the injectors will become unfit for easy recovery using the normal maintenance of the printer. In particular, it defines such characteristics of the printhead, such as stability during storage. Long-term readiness for printing in an open condition desirable for the ink to nozzles were able to stay open without use for long periods of time, after which the print head can be powered in the maintenance.

Without going into any theory, it appears that the variations of the embodiment of the ink compositions have good features ready for printing in an open state, at least partly, due to the combination of water-soluble solvent/co-solvent and anion(data) surfactant(data) substance(s). Further, it appears that the solvent(s) reduces(imports) to minimumonline viscosity of the polyurethane in solution and that of the anion(s) surfactant(s) substance(s) contribute(s) to the exclusion of polyurethane from the zone of the nozzle and return inky mass as the water evaporates.

Variants of the embodiment of the ink composition for inkjet printing in General include a polyurethane material, a solvent and an anionic surfactant. It should be clear that all the materials of the ink composition are present in effective amounts so that the combination has provided at least one of the following characteristics when printing: high optical density, short drying time, increased resistance to smudging marker, an increased resistance to disgrace in the wet state and/or combinations thereof. Further, it should be clear that the materials of the ink composition are present in effective amounts to enhance performance ready for printing in an open state (decap).

In the embodiment, the polyurethane material has a mass-average molecular weight of from about 50,000 to about 500,000. In the embodiment, the polyurethane has an acid number in the range from about 10 mg KOH/g of polymer to about 150 mg KOH/g polymer. In yet another embodiment, the polyurethane has an acid number ranging from about 50 mg KOH/g of polymer to about 70 mg KOH/g polymer. Polyurethane material is present in an effective amount ranging from about 0.2 wt. percent to about 5 wt. percent. It seems that the described characteristics of the polyurethane is in the broad range of molecular masses (for example, from about 10,000 to about 500,000) reduce the drying time of the ink composition. Moreover, it seems that the macromolecular nature of the polyurethanes described here contributes to the excellent stability of the ink composition.

The solvent can be an individual solvent or a combination of two or more solvents. In General, the solvent(s) present(s) in an effective amount ranging from about 5 wt. percent to about 20 wt. percent. In a non-limiting example, an effective amount ranges from about 5 wt. percent to about 15 wt. percent. Non-limiting examples of solvents suitable for the ink composition for inkjet printing, include 1,3-bis(2-hydroxyethyl)-5,5-dimethylhydantoin; propoxylated glycerol, low molecular weight (e.g., Mn=266); 2-hydroxyethyl-2-imidazolidinone (i.e. the 2-hydroxyethyl-2-imidazolidone); 2-hydroxyethyl-2-pyrrolidone (i.e. the 2-hydroxyethyl-2-pyrrolidinone); 1,2,6-hexanetriol; D-sorbitol; 1,4-bis(2-hydroxyethyl)piperazine; 3-(N-morpholino)-1,2-propandiol; polyoxyethylene simple ether of glycerol, low molecular weight; polyethylene glycol of low molecular weight (e.g., Mn=300); tetraethylene glycol and/or combinations thereof.

Anionic surfactant is present in the ink HDMI is the effective number, ranging from about 0.01 wt. percent to about 3 wt. percent. First class (referred to here as "class 1") suitable anionic surfactants include, but are not limited to these, alkyl sulphates, having a carbon chain with the number of carbon atoms from eight to sixteen (non-limiting examples of which include sodium Laureth sulphate and sodium lauryl sulphate), dodecylbenzensulfonate, N-lauroylsarcosinate, poly(oxy-1,2-ethandiyl) and combinations thereof. The second class (referred to here as "class 2") suitable anionic surfactants include, but is not limited to such, phosphate ester surfactants, each of which has one of the following General structures:

where R=the hydrophobic fragment (for example, oleyl, nonylphenyl etc), and the index n=integers from 1 to 20. As indicated in the structures, phosphate ester surfactants have either a single hydrophobic tail fragment (non-limiting examples of which include aerovee mono/di-ester phosphates of polyethylene glycol (one of which is a commercially available product under the trade name Crodafos N10A from the company Croda, Inc., located in Edison, new Jersey) and mono(octylphenyl)phosphate polyethylene glycol, or the like); l is Bo several hydrophobic tail fragments (for example, Nonylphenol ethoxylated branched phosphates (a non-limiting example of which is Nonylphenol ethoxylated phosphate ester, which is a commercially available product under the trade name Phospholan 9NP from Akzo Nobel Chemical, located in Arnhem, the Netherlands). Another non-limiting example of a suitable phosphate ester surfactants (class 2) is a PPG-5-Ceteth-10 phosphate (a non-limiting example of which is a commercially available product under the trade name Crodafos SG from the company Croda, Inc.). It should be understood that salts of the above anionic surfactants may also be suitable for use in the ink composition.

Variants of the embodiment of the ink composition may also include coloring components, water, anionic binder (non-limiting examples of which include acrylic binder, styrene binder and/or the like, and/or combinations thereof), and/or any other suitable additives. In the embodiment, the color component is a pigment(you) and/or dye(s) in an effective amount ranging from about 0.1 wt. percent to about 6 wt. percent. In General, water is the rest of the ink composition.

It should be clear that the pH of the ink composition can vary, as it is desirable. In one embodiment, the pH of the ink ranges from about 7 to about 10.

It should be clear that various types of additives can be used in ink compositions to optimize the properties of the ink composition for specific applications. For example, biocides can be used in one variation of the embodiment of the ink composition for inhibiting the growth of microorganisms. One suitable non-limiting example of a biocide is a 1,2-benzisothiazolin-3-one (BIT). Complexing compounds such as EDTA (ethylenediaminetetraacetic acid), can be included to substantially mitigate the potential harmful effects of heavy metals (if present). Buffer solutions can be used to control the pH of the ink composition, as desired and/or required for a particular end use.

In one variant of an embodiment of an inkjet printing system option exercise ink composition for ink-jet printing is applied to at least part of a suitable substrate. It should be clear that can be selected any substrate that is suitable for printing characters on it (for example, alphanumeric characters and/or graphics). In one variant embodiment, the substrate of t is made by a paper (non-limiting examples of which include plain paper for copiers or paper, containing fibers from recycled for re-use of waste paper or photo paper (non-limiting examples of which include paper, on one or both sides of which way the extrusion caused polyethylene or polypropylene, and/or combinations thereof. In the embodiment, the substrate has a thickness of almost along the entire length in the range between about 0.025 mm and about 0.5 mm

Ink composition for inkjet printing may be applied to the substrate using any suitable technology inkjet printing. Non-limiting examples of such technologies inkjet printers include thermal, piezoelectricity and piezoelectric inkjet printing.

In the embodiment, before applying the ink composition for inkjet printing on a substrate can be applied to the liquid retainer. Without going into any theory, it appears that the liquid retainer mainly contributes to the achievement of good print quality by holding the pigments and binders on the surface of the substrate. Ingredients suitable liquid release include, but are not limited to those acid (non-limiting examples of which include organic acids), salt (non-limiting examples of which include the salts of divalent or trivalent metals), cationic polymers (non-limiting examples of the cat is of which include polymers with Quaternary ammonium salts) and/or combinations thereof.

To further illustrate variant(tov) the execution of this description here is a variety of examples. It should be clear that these examples are given for purposes of illustration and should not be construed as limiting the scope of the disclosed(-ies) of option(-s) execution.

EXAMPLES

One ink composition was obtained using many different solvents (Table 1). Each type of ink included about 8 wt. percent of the selected solvent, about 0.7 wt. percent of Surfynol®SEF (nonionic surfactant, commercially available from the company Air Products and Chemicals, Inc., located in Allentown, PA.), about 0.5 wt. percent Crodafos®N3 (anionic surfactant, commercially available from the company Croda, Inc., located in Edison, new Jersey), about 0.1 wt. percent Zonyl®FSO (non-ionic fluoride surfactant, commercially available from Dupont located in Wilmington, Delaware), about 0.1 wt. % Proxel®GXL (a biocide commercially available from the company Arch Chemicals, Inc., located in Norwalk, Connecticut), about 2 wt. percent polyurethane having a molecular weight of 180,000, and 0.1 wt. percent of pigment.

136
Table 1
The results of the COI is Tania ready for printing in an open state (decap) for inks with different solvents
Ink No.SolventThe range ready for printing in an open state
11,4-Bis(2-hydroxyethyl)piperazine11
21,2,6-Hexanetriol15
3D-Sorbitol20
41,3-Bis(2-hydroxyethyl)-5,5-dimethylhydantoin23
52-Hydroxyethyl-2-imidazolidinone35
63-(N-morpholino)-1,2-propandiol43
7Propoxylated glycerin (molecular weight MW=266)50
8Polyoxyethylene simple ether of glycerin70
9Polyethylene glycol (MW=300)87
102-Hydroxyethyl-2-pyrrolidone
11Propoxylated glycerol (MW=1000)153
12Propoxylated glycerol (MW=720)169
13Triethylene glycol186

It should be clear that the term "range ready for printing in an open state" in Table 1 indicates the number of pumps that will be cleaned with open nozzle to the characteristics of the discharge complied with their initial performance at the opening. The test was performed at different times of exposure without a lid, with 2 seconds, 6 seconds, 14 seconds and 1 minute. The ranges presented in Table 1 represent the summation of pumps in various tests. It should be clear that the ink having a smaller ranges ready for printing in an open state, had the best performance ready for printing in an open state (decap)than any ink that showed extended ranges.

Another ink composition was obtained using a variety of surfactants are shown (Table 2). Each type of ink included about 8 wt. percent of RA is the God (or Dantocol ®DHE, or 1,2,6-hexanetriol), about 0.7 wt. percent of Surfynol®SEF, about 0.5 wt. the percentage of the selected anionic surfactant, about 0.1 weight percent Zonyl®FSO, about 0.1 wt. % Proxel®GXL, about 2 wt. percent polyurethane having a molecular weight of 180,000, and 0.1 wt. percent of pigment.

Table 2
The test results are ready for publication in the open state (decap) for inks with different surfactants
Ink No.SurfactantClass No.The resulting range ready for printing in an open state with DantocolThe resulting range ready for printing in an open state with 1,2,6-hexanetriolResults exporting range ready for printing in an open state
APhosphate olejowego simple ether of polyethylene glycol211718
BNonylphenolic amoxillian the first branched phosphate 210818
CPhosphate monooctyltin simple ether of polyethylene glycol210919
DSodium lauryl sulfate114822
ESodium Laureth sulphate114923
FSodium lauryl sulfate1131124
GThe phosphated alkalitolerant2201535
HN-ActiverainX5554 109
IAmphoteric organic phosphateX4864112
JNonylphenol ethoxylated branched phosphate210No data10
KArrangementsthatX79No data79

It should be clear that the term "result range ready for printing in an open state" in Table 2 means the number of pumps used for cleaning unclosed injectors to ensure that their emission characteristics are essentially consistent with their initial performance at the opening. The test was performed at different times of exposure without a lid, with 2 seconds, 6 seconds, 14 seconds and 1 minute. The ranges presented in Table 2 represent the summation of pumps in various tests. It should be clear that the ink is characterized by smaller ranges ready for printing in QCD is item condition, had the best features ready for printing in an open state (decap)than any ink that showed increased ranges. In General, surface-active substances of classes 1 and 2 (which are both defined above) showed themselves as providing excellent performance readiness in print in the open state. Surfactants that are not related to any of the classes 1 and 2, noted in table 2, the mark "X".

Another ink composition was prepared with a variety of anionic binding means (shown in Table 3). Each type of ink included about 9% 1,2,6-hexanetriol, about 0.7% Surfynol®SEF, about 0.5% Crodafos®N3, about 0.1% Zonyl®FSO and about 3% satismarriages black pigment.

Table 3
The optical density, the lubricating marker and ready for printing in an open condition for inks with different anionic binding means
Binder for inkThe optical density of the black color (KOD)Lubrication in a single pass (mOD)Lubrication with two aisles (mOD)The resulting range ready for printing in an open state
1,39231205
1.5% polyurethane (molecular weight MW=25000)1,39801955
No1,3111521517
1,5 Joncryl 5861,381202385

First grade ink, made with polyurethane high molecular weight (PU-A), provided superior resistance to smudging marker, at the same time showing equivalent or superior options ready for printing in an open condition when compared with the second grade ink (made from polyurethane with a low molecular weight (PU-B)), the third grade ink (without additional binder) and fourth grade ink (Joncryl®586, styrene-acrylic polymer with a low molecular weight).

The optical density of the black color and characteristics of lubrication in Table 3 are averaged to couple the ex type normal office sheet paper. Indicators of "lubrication in a single pass," represent the transfer of ink on the unsealed area of the paper as a result of normal office fluorescent marker marker to highlight text, which once held the band across the sealed area. "Lubrication for two-pass" represents a similar transfer of ink on the unsealed area of the paper, caused by two procalcitonine normal marker across the printed samples, quickly following each other. It should be clear that increasing the value of lubrication talk about the worst stability.

It should be clear that the term "result range ready for printing in an open state" in Table 3 means the number of pumps used for cleaning unclosed injectors to ensure that their emission characteristics are essentially consistent with their initial performance at the opening. The test was performed at different times of exposure without a lid, with 2 seconds, 6 seconds, 14 seconds and 1 minute. The ranges presented in Table 3 represent the summation of pumps in various tests. It should be clear that the ink having a smaller ranges ready for printing in an open state, had the best performance ready for printing in an open status is anii (decap), than any ink that showed increased ranges.

Variants of the embodiment of the ink compositions and systems mainly include polyurethanes of high molecular weight to increase stability, at the same time also including a particular combination of solvent and surfactants to improve performance.

While there were described some options, qualified specialists in this area of technology will be clear that the disclosed variants can be modified. Therefore, the above description should be considered more as an example than as a constraint.

1. Ink composition for inkjet printing, including:
polyurethane material having a mass-average molecular weight ranging from about 50,000 to about 500000, with an acid number ranging from about 50 mg KOH/g of polymer to about 70 mg KOH/g polymer, in an effective amount in the range from about 0.2 wt.% to about 5 wt.%;
the solvent is selected from 1,3-bis(2-hydroxyethyl)-5,5-dimethylhydantoin; propoxylated glycerol, low molecular weight; 2-hydroxyethyl-2-imidazolidinone; 2-hydroxyethyl-2-pyrrolidone; 1,2,6-hexanetriol; D-sorbitol; 1,4-bis(2-hydroxyethyl)-piperazine; 3-(N-morph the Lino)-1,2-propane diol, present in an effective amount ranging from about 5 wt.% to about 20 wt.%; and
anionic surfactant chosen from alkyl sulphates, having a carbon chain with the number of carbon atoms from eight to sixteen, dodecylbenzensulfonate, N-lauroylsarcosinate, poly(oxy-1,2-ethandiyl), phosphate ester surfactants having a single hydrophobic tail fragment, phosphate ester surfactants present in an effective amount in the range from about 0.01 wt.% to about 3 wt.%;
where the composition is adapted for the display of superior ready for printing in an open state (decap).

2. The ink composition according to claim 1, in which the ink composition for inkjet printing is adapted to print on the substrate, and in which the ink composition for inkjet printing manifests characteristics selected from the increased optical density, reduced drying time, increased resistance to smudging marker, increased resistance to disgrace wet and combinations thereof.

3. The method of forming an ink composition for inkjet printing, including:
mixing from about 0.2 wt.% to about 5 wt.% polyurethane having a bulk molecular the th mass, ranging from about 50,000 to about 500000, with an acid number ranging from about 50 mg KOH/g of polymer to about 70 mg KOH/g of polymer with a solvent selected from 1,3-bis(2-hydroxyethyl)-5,5-dimethylhydantoin; propoxylated glycerol, low molecular weight; 2-hydroxyethyl-2-imidazolidinone; 2-hydroxyethyl-2-pyrrolidone; 1,2,6-hexanetriol; D-sorbitol; 1,4-bis(2-hydroxyethyl)-piperazine; 3-(N-morpholino)-1,2-propane diol, present in an effective amount ranging from about 5 wt.% to about 20 wt.%; and
mixing from about 0.01 wt.% to about 3 wt.% anionic surfactants with a combination of polyurethane and solvent;
in which the composition improves the characteristics ready for printing in an open state.

4. The method according to claim 3, further comprising adding to the mixture from about 0.01 wt.% to about 6 wt.% the coloring matter of the amount of water to achieve balance.

5. Ink system for inkjet printing, including:
substrate; and
ink composition for inkjet printing done at least part of the substrate, with the ink composition for inkjet printing includes:
polyurethane material having a mass-average molecular weight ranging from about 50,000 to bring the flax 500000, with an acid number ranging from about 50 mg KOH/g of polymer to about 70 mg KOH/g polymer, polyurethane material is present in an effective amount in the range from about 0.2 wt.% to about 5 wt.%;
the solvent is selected from 1,3-bis(2-hydroxyethyl)-5,5-dimethylhydantoin; propoxylated glycerol, low molecular weight; 2-hydroxyethyl-2-imidazolidinone; 2-hydroxyethyl-2-pyrrolidone; 1,2,6-hexanetriol; D-sorbitol; 1,4-bis(2-hydroxyethyl)-piperazine; 3-(N-morpholino)-1,2-propane diol is present in an effective amount ranging from about 5 wt.% to about 20 wt.%; and
anionic surfactant chosen from alkyl sulphates, having a carbon chain with the number of carbon atoms from eight to sixteen, dodecylbenzensulfonate, N - lauroylsarcosinate, poly(oxy-1,2-ethandiyl), phosphate ester surfactants having a single hydrophobic tail fragment, phosphate ester surfactants,
present in an effective amount in the range from about 0.01 wt.% to about 3 wt.%; and
where the composition is adapted for the display of superior ready for printing in an open state (decap).

6. Ink system for inkjet printing according to claim 5, in which between the substrate and cheryln the second composition is applied to a liquid retainer, and in which the liquid retainer is selected from a salt, acid, cationic polymer, and combinations thereof.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: described is an activator of adhesion of ink to a substrate, containing a product of reaction of (a) a polymer solution or synthetic resin, (b) sulphonic acid or derivative thereof and (c) a metal compound selected from a group consisting of a metal halide, metal alkoxide, metal halide-alkoxide or a condensed metal alkoxide, where the metal is titanium or zirconium. The amount of sulphonic acid or sulphonic acid salt (b) and metal compound (c) corresponds to molar ratio of SO3X, where X is a H atom or a base residue, to Ti and Zr atoms ranging from 0.25:1 to 2:1. The invention also describes printing ink containing said adhesion activator.

EFFECT: reduced yellowing and smell of ink compared to ink which contains titanium acetyl acetonate as an adhesion activator while preserving effectiveness of the adhesion activator.

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FIELD: chemistry.

SUBSTANCE: disclosed is a colourless luminescent decorative paint containing a luminophor and binder. The luminophor is an organic luminophor with anomalously large Stokes shift which is greater than 100 nm, which is colourless in daylight and luminescent in the visible spectral region when illuminated with a source of UV radiation. The organic binder is a transparent organic substance which does not absorb long-wave ultraviolet radiation in the 365-420 nm range.

EFFECT: obtaining fast and stable luminescent paint which contains a colourless organic luminophor, which enables to create a latent image which appears upon illumination with UV radiation which is invisible in daylight as well as in the dark, in the absence of UV radiation, the paint ensures high strength of the polymer base of the decorative layer of the article obtained using said paint.

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FIELD: printing industry.

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

14 cl, 6 tbl, 6 ex

FIELD: printing industry.

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

EFFECT: higher speed of dye drying, its stability to fading and improved spreading of a raster dot.

13 cl, 7 tbl, 7 ex

FIELD: chemistry.

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

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

16 cl, 1 tbl, 8 ex

FIELD: chemistry.

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

or

,

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

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

7 cl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for marking substrates. The invention describes a composition for marking substrates, which contains 0.01-50 wt % colourant, 0.01-50 wt % metal salt and carboxylic acid, 1-80 wt % binder and 1-99 wt % organic solvent. Also described is a method of preparing the said composition, a substrate coated with the said composition and a method of marking substrates using the said compositions. The disclosed composition is based on using readily accessible carboxylic acid salts which can not be coloured before exposure to effects of energy.

EFFECT: composition enables to obtain semi-transparent or transparent coatings with high intensity and brightness.

9 cl, 14 ex

FIELD: printing.

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EFFECT: offered inks provides decrease in a time of drying at achievement of a sharp image and decrease in quantity of surfactants or wetting agent or their absence in inks on the basis of black pigment.

10 cl, 5 dwg, 3 tbl, 1 ex

FIELD: chemistry.

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EFFECT: obtaining liquid for holding water-based ink onto paper, which efficiently reduces curling and deformation of printing paper.

14 cl, 9 tbl, 7 ex

FIELD: physics; image processing.

SUBSTANCE: present invention pertains to a protective element for counterfeit protected paper, valuable documents etc. as well as the counterfeit protected paper and valuable documents, method of making such a protective element, printing ink containing pigment with variable optical properties and method of making such printing ink. The protective element contains a thin-layer element with a colour tilt effect, consisting of a reflecting layer, absorbing layer and an intermediate layer between the reflecting layer and the absorbing layer. The intermediate layer is formed by the printing layer, containing dispersed particles with monomodal or oligomodal size distribution.

EFFECT: obtaining a simple protective element which can be made cheaply and which has high level of security from counterfeit.

62 cl, 12 dwg

The invention relates to inkjet printers and, in particular, to a printhead containing various types of jet generators

FIELD: printing industry.

SUBSTANCE: proposed ink composition for inkjet printing includes a polyurethane material having an average molecular weight of from about 50000 to about 500000, in an effective amount of from about 0.2 wt % to about 5 wt %. The composition also includes a solvent in an effective amount of from about 5 wt % to about 20 wt %, and an anionic surfactant in an effective amount of from about 0.01 wt % to about 3 wt %. Also a method of creation of this ink composition and an ink jet printing system, comprising a substrate and the indicated ink composition is provided.

EFFECT: proposed ink composition for ink jet printing provides improved readiness for publication in an open state.

6 cl, 3 tbl, 13 ex

FIELD: printing inks.

SUBSTANCE: invention relates to materials generating charge, in particular to printing inks and toners for protective marking and applying protective markers in order to reveal falsifications and counterfeits. Use of counterfeit protection technology is described involving printing ink composition containing charge-generation substance and a medium, wherein charge-generation substance has maximum absorption in near IR region within a range of 700-1500 nm and in visible region within a range of 400-700 nm, this substance being compound selected from a type of polymorphous modification of X form of metal-free phthalocyanine, type of polymorphous modification of Y form and phase I and II forms of titanyloxyphthalocyanine, polymorphous modification of phase II form of vanadyloxyphthalocyanine, and polymorphous modification of phase V form of hydroxygalliumphthalocyanine and methoxygalliumphthalocyanine. Printing ink composition is applied onto an article or substrate using known printing procedure. Methods of establishing authenticity of an article or substrate are also described, which consist in determining characteristic absorption of marker in near IR region.

EFFECT: enabled effective protection of articles or substrates when using printing inks containing, for example, blue or green dyes, whose absorption bands can be shifted to infrared region and partially mask absorption properties of marker.

20 cl, 4 tbl, 6 ex

FIELD: printing technique.

SUBSTANCE: set and method of printing can be used for printing light-absorbing signs of protection of printed items. Set of printing ink for printing of light-absorbing signs has at least two dyes. Any dye has at least one dyeing matter, pigment of dye which absorbs visible light. Set of printing inks has first and second groups of dyes. Dyes from first group additionally have mark with preset spectral absorption characteristic, preferably with characteristic relating to absorption. Mark has absorption maximum within wavelength range of 700-900 nm, preferably, 780 nm, and the mark practically doesn't absorb light within visible spectrum of absorption. Dyes of second group has dyeing matter, dye or pigment, which absorbs light within visible light spectrum and they have the same maximum of absorption within IR-red spectrum at wavelength around 700 nm as spectral characteristic within IR-red range of mark, Method of printing signs, printed item and set of dyes, including four-color set of printing inks and IR-mark, are described.

EFFECT: reliability of identification of authenticity of item independently on color of signs.

15 cl, 5 dwg, 2 app

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: 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: 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: 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: 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: chemical industry; printing industry; powder metallurgy industry; cosmetic industry; other industries; production and application of the highly anticorrosive metallic pigments.

SUBSTANCE: the invention is pertaining to production of the of the highly anticorrosive metallic pigments similar to laminas, which may be used in production of the printing ink, plastic materials, cosmetics, the powder coatings and in other branches of industry. The pigments have on their surfaces: the metallic substrates similar to the laminas and treated with the compounds of the phosphoric acid and-or the compounds of the boric acid; one or more layers of the coatings consisting of one or more hydrated oxides of the metals of one or more metals selected from the group, which includes silicon, aluminum, zirconium, titanium and tin. On the basis of the highly corrosive metallic pigments similar to laminas it is possible to produce the interferential colored pigments. The invention allows to increase the anticorrosive resistance of the metallic pigments at the expense of saving without the faults of the initial surface smoothness of the similar to the laminas metallic substrates, to increase the homogeneity and density of the layers of the hydrated oxides of the metals.

EFFECT: the invention ensures the increased anticorrosive resistance of the metallic pigments, saving the initial surface smoothness of the similar to the laminas metallic substrates, the increased homogeneity and density of the layers of the hydrated metals oxides.

40 cl, 9 ex, 4 tbl, 8 dwg

FIELD: print engineering.

SUBSTANCE: invention provides ink containing first fluorescent color material emitting fluorescence at specified emission wavelength used for measurement or determination of excitement at specified excitement wavelength; and second fluorescent color material emitting fluorescence when excited at specified excitement wavelength, said second color material being contained in larger amount than said first color material. To obtain fluorescence at desired emission wavelength, excitement spectrum of the first color material in ink should have peak wavelength range adjoining specified fluorescent wavelength, and emission fluorescence spectrum of the second color material has emission wavelength range that includes at least above-mentioned peak wavelength range.

EFFECT: enhanced fluorescence intensity due to presence of several fluorescent coloring substances.

9 cl, 26 dwg, 3 tbl, 6 ex

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