Ink for inkjet printing


(57) Abstract:

The invention relates to ink for ink-jet printing, including personal printers. Paint includes flotation-oxal or more dense fractions of 0.05-6 wt.%, water-soluble dye is not soluble in the flotation-oxala or more dense fractions, 0.5 to 6 wt.% and water the rest up to 100 wt.%. Technical result: paint allows the use of readily available and safe sanitary raw material for production of inks for inkjet printing with good performance characteristics. 3 table.

The invention relates to aqueous dye compositions used for inkjet printing on paper, including personal inkjet printers.

There are a large number of water paints proposed for inkjet printing.

The easiest part is the solution of the dye in water. The downside of it is quick drying out and clogging of nozzles of the printhead and a relatively slow drying of the ink on the paper. The device in printers for sealing head in inoperative position, used all personal printers, and special containers for printing the Xia paint, containing in addition to dye the non-volatile solvent for him and the water. As a non-volatile solvent use alcohols, such as glycerin, ethylene glycol, triethanolamine, other high-boiling alcohols (TSB, and.with. USSR N 1513007, Pat. USA N 5352283, and.with. USSR N 1825807). With the introduction of a sufficient number of non-volatile solvents, the problem of drying of the composition in the cylinder is solved, but there are three other problems: paint dries very slowly on paper, the printhead nozzles clogged crystallizing from a solvent dye, resulting in poor print quality (stripes on the letters), the printed text is characterized by the worst resistance than when using just the solution of the same dye in water.

To avoid crystallization of the dye in the composition is administered surfactant, such as sulfinol (and.with. USSR N 1513007), gidroksietilirovanny polyethylenimine (U.S. Pat. USA N 5352283), but in this case, the sensitivity Viechtach to moisture may increase.

Significantly improves the drying rate and improves the water resistance of the print when used as a component along with the non-volatile solvent for the dye (polyhydric alcohols) volatile water-soluble of such compositions is a certain fire paint which is inconvenient in individual use, but, most importantly, the paint gets a smell, noticeable when printing, and accelerated drying of the composition in the printhead. Especially strongly deteriorates the resistance to drying out when using low-boiling volatile alcohols - ethanol, propanol, isopropanol. The use of high-boiling volatile alcohols and spitefire, such as ethyl cellosolve and datetoday alcohol, other high-boiling volatile alcohols and spitefire, slows down the drying of the composition, but not enough, and the printhead is not in working condition requires immediate seal that prevents evaporation.

Known compositions containing liquid-phase dye, including compositions with the addition of volatile alcohols, have their drawbacks and, in addition, these compositions are unattractive to domestic industry, since the production of the required liquid dyes in our country is not organized.

Thus, the prior art of obtaining compositions for inkjet printing using water-soluble solid (crystalline) dyes is to use, in addition to the dye and water, the organic additives, representing nelere, adopted for the prototype (4), including as the organic additive is a mixture of amerosport (non-volatile solvent for the dye) and diacetone alcohol (volatile modifier) in a ratio of components, wt.%:

Water-soluble dye - 1-4

Amerosport - 3-10

Datetoday alcohol - 10-25

Water - the Rest

Composition adopted for the prototype, albeit to a lesser extent, but has all the disadvantages of the known compositions with non-volatile solvent dye, in addition, the use diacetone alcohol having irritating the respiratory tract properties, makes it difficult to use the composition in the personal printers.

The aim of the invention is a paint composition for inkjet printing, not to seal the die printhead with drying out in the air, speed of drying and water resistance of the seal and no air polluting when printing.

This goal is achieved by a paint composition comprising a water-soluble dye, water and an organic additive, characterized in that the organic additives used flotation-oxal or more dense fractions, and as a dye is a water - soluble dye is not soluble in flotation is racial, insoluble in flotation-oxala or more dense fractions of 0.5 -

Flotation-oxal or more dense fraction of 0.05 -

Water - the Rest

The invention differs from the prior art by the fact that as an organic additive used is not a solvent for the dye, and its non-volatile precipitator - flotation-oxal. When this is achieved the unusual and paradoxical for the introduction of a non-volatile additive effect of accelerating the drying, this effect also occurs with the simultaneous use of non-volatile solvents such as glycerin, triethanolamine, i.e. paint containing higher amounts of non-volatile dries faster.

Flotation-oxal is a high-boiling side product of the production of 4,4-dimethyl-1,3-dioxane used in the manufacture of isoprene. Flotation-oxal is a heavy product, has long been produced by the industry and is widely used, primarily as a flotation additive to drilling mud in the oil industry, then as a plasticizer in the production of rubbers, plastics and paints and varnishes (TC 2452-029-05766801-94), as the remover nucleonic resins.with. USSR N 1813776, publ. 1993), as raw material for the production of protective with the 20oC derivatives of dioxane and Piran, including oxyalkylation and bis - Spiro-doxycycline. The composition of the flotation reagent complex. In addition to the non-volatile, having a density of more than 1.0 g/cm3flotation may contain a small amount of volatile, such as dimethyldioxirane. Active principle complex mixture of flotation reagent-oxala for the purposes of this application is not revealed, except that an efficient dense and non-volatile fractions.

The more dense fractions of oxala can be obtained by any known method, for example by distillation under vacuum, distillation with steam, air purge when heated, the phase separation by adding water, etc.

In the examples of the application used:

flotation-oxal THE 2452-029-05766801-94 brand T-66 (technical requirements TU - in the Annex to the description)

the fraction of the flotation reagent obtained in Cuba after the distillation with steam, the density of 1.08 g/cm3the initial volatility under 202oC 0,095 mg/cm2in an hour,

the fraction of the flotation reagent, obtained by the distillation of the volatile from the heavier phase, highlighted by the addition of water, with a density of 1.13 g/cm3the initial volatility under 202oC 0,069 mg/cm2in the hour. Volatility was determined, Viata average volatility in the first three days. When continuing to test samples showed a decrease in volatility, the sample density of 1.08 g/cm3when testing the following 72 hours showed volatility 0,061 mg/cm2per hour, and the sample with a density of 1.13 g/cm30,034 mg/cm2per hour, for comparison, the volatility of distilled water in a parallel test of 45.6 mg/cm2an hour.

The dye used according to the invention is chosen from the group of water-soluble dyes are not soluble in the flotation-oxala. Can be used a mixture of dyes. In the examples of the application used nigrosine according to GOST 4014, acid blue-black OST 6-14-21, straight black ZS THE 6-14-948 insoluble oksale dyes according to GOST 10850. The insolubility of the dye is determined in drip the sample under a microscope (h): on a glass slide put a drop of liquid, making the drop from the tip of the scalpel sample dye, cover with a cover glass, incubated and examined under a microscope. The dye is insoluble, if under a microscope visible neraspavsheysya crystals of the dye, while neglect to change the color of the fluid coming through the dissolution of impurities. On a glass slide put a drop: flotation reagent-oxala with a density of 1.03 g/cm33very poorly painted in a grayish-pink color, drops the heavier fractions are absolutely colorless.

Flotation and its fractions are precipitator for dyes used in the invention. On a glass slide placed drops of flotation reagent brand T-66 with a density of 1.03 g/cm3and 1.05 g/cm3, fractions with a density of 1.08 g/cm3and 1.13 g/cm3and in every drop add drop of 4% solution of nigrosine in the water. After an hour, examine the samples under a microscope - all dye samples fell in the form of aggregates of microcrystals, the liquid phase uncolored or colored faintly.

Kamawanai water (GOST 6709) 4.0 g of nigrosine grade (GOST 4014), contribute 4.0 g of flotation reagent-oxala THE 2452-029-05766801-94 brand T-66 with a density of 1.05 g/cm3, stirred, filtered through filter - red ribbon.

The resulting paint black composition: dye 4.0 wt.%, flotation-oxal 4.0 wt. % of water - the rest, pour into a clean cartridge HP A, seal, pull the cartridge and printed on a Hewlett Packard 540 on the paper density 80-85 g/m2normal font Times ET. In comparison with the structure adopted for the prototype and manufactured using the same concentration of nigrosine, and control of the composition, representing a 4% solution of nigrosine in distilled water, get paint, drying at 202oC for 5 seconds (prototype 15 seconds, the control 20 sec). Take out the cartridge, place it on the table, stand in the air for 15 days at room temperature and a relative humidity of 45-65%, is inserted into the printer and print cartridge is not propective the first few lines (the defects of characters in the first 1-5 lines), and then prints without defects (prototype, tested in parallel, does not print 4 sheets completely removed from test to otkachki in the water, the control does not print 4 sheets completely removed from test to otkachki in water). The sheet with the text you after 5 minutes blurs slightly, the letters don't fade, water stained weakly (prototype-dye is washed off, the letters fade, water becomes strongly control - water stained weakly). After irradiation with a UV lamp Medicor Q-139 for 2 hours printed on the paper of the text changes color print no control, inventions and prototypes.

The limiting values of the components of the claimed composition selected from the following considerations: the content of the dye is normal for ink jet printing; the content of the additive - flotation reagent-oxala or more heavy fractions in the lowest value is defined as the boundary, giving for any kind of supplements (as of oxala and its fractions) main declared the effect of improving the sustainability of the printhead to the drying out without the appearance of nephropathic in comparison with control - dye solution in water. For tests applied the following methodology: the paint produced according to the technology described in the above example, is poured into the cartridge seal and purge the cartridge, put the cartridge into the printer, print 10 sheets control text for washing the head, then use the cartridge for testing. Personal inkjet printers of all brands do not allow the print head is lett Packard 540 such time is 3 minutes, after that, the cartridge is extracted from the sealing device for any purpose, automatically returns to its place and sealed. For testing the cartridge output to the middle position (position for replacement of the cartridge), the printer is powered-down and incubated for a certain time for drying, after which include a printer and print. As a minimum testing time taken 6 and 10 minutes. Table 1 shows the formulations of paint on the application, in table 2 - test results in comparison with the control and prototype. From table. 1 and 2 shows that the introduction of flotation reagent or its fractions at the lower limit of the claimed values provides the recorded effect. The upper limit of the additive is limited by the fact that at concentrations above 6% of the flotation reagent of oxala paint occasionally has the disadvantage that when used HP print cartridges A apparent defect repropagate the end of the first line in the beginning of the line cartridge prints fine, but the second half - line with nephropidae, subsequent printing normal.

In addition to these components, the paint may include (in excess of 100%) of the known components used for the known purpose, such as thickeners, such as stromal, Akron; weights and at the same time the wetting or antiseptics, such as propylmalonate, funeralopolis, sulfinol; pH regulators, such as ammonia, borax, caustic soda, citric acid, sucrose and Trilon B to prevent the driving of nozzles salts of calcium; other well-known components; the dye can be used in the known modifications. The introduction of well-known components for the known purpose may be appropriate, in particular, to summarize the parameters of the paint applied to specific equipment for printing, paper quality, to adjust the colors when using mediterranei water, etc. is also well-known components are introduced in excess of 100%, i.e. their net ratio of components must comply with the request.

With the introduction of such optional components as polyhydric alcohols, the effect of accelerating the drying of the ink by flotation-oxales very significant. Table 3 shows the formulations and properties of the inks obtained by adding optional components to the paints according to the examples of table 1, and test cases.

All copies of this application are printed on the domestic paper Kotlas pulp article 1-53-53202 paint on the application.

Ink for inkjet printing, comprising a water-soluble dye, water and an organic additive, wherein the organic additive contains flotation-oxal or more dense fractions, and as a dye is a water - soluble dye is not soluble in the flotation-oxala or more dense fractions, in the following ratio, wt.%:

Water-soluble dye is not soluble in the flotation-oxala or more dense fractions of 0.5 -

Flotation-oxal or more dense fraction of 0.05 -

Water - The Rest.


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