Composition for printing inks for inkjet printers

 

(57) Abstract:

The invention relates to the printing industry, namely the production of printing inks for inkjet printers. Describes a composition for printing inks for inkjet printers, including dye, glycerin and water; contains as a dye aniline black, as water - distilled water, and optionally heteropolyanions and at least two surfactants selected from the group comprising alkyl sulphates, OP-20-based oxyalkylated ALKYLPHENOLS and Serax-40 (Stearic-40) based on ethoxylated fatty acids and products of oksietilirovannye tall oil, taken in equal quantities, in the following ratio, wt.%: dye aniline black 2-16, glycerin 26-34, heteropolyanions 0,05-1, at least two surfactants, taken in equal quantities 2-4, the rest distilled water. Designed composition for printing inks for inkjet printers, which will ensure high quality printing, water resistance, light resistance, which increases the storage stability of the printed piny shelf life with the preservation of its performance. 2 C.p. f-crystals, 1 tab., 1 Il.

The invention relates to the printing industry, namely the production of printing inks for inkjet printers.

Known water-based ink composition for recording (Japan Patent 6043569, 09 D 11/16, 16.03.89 g) containing a water-soluble dye, 3-10% glycerol, 5-30% of diethyleneoxide and propylene oxide.

The disadvantage of this paint is its low resistance and print quality, and it is lightfast and water-resistant.

The closest in technical essence is known composition of the ink for inkjet printers (U.S. Patent 5421871, 09 D 11/02, 06.06.92, containing >0.01% of a black dye, 1-10% glycerol, 1-10% With 1-4-monohydroxy alcohol, 0.5 to 10% 1,3-dimethyl-2-imidazolidinone and 75-90% water.

The disadvantage of this printing ink is its instability at low temperatures, under the influence of which it loses its original quality. Printed this paint is not enough water-resistant and lightfast.

The problem to which this invention is directed is the development of such a composition for printing inks for inkjet printers, which will ensure high quality printing, the resistance, the th composition resistant to -22oWith, has a long shelf life and significantly lower cost compared to imported inks.

This technical result is achieved in that the composition for printing inks for inkjet printers, including dye, glycerin and water, contains as a dye Aniline black, as water - distilled water, and optionally heteropolyanions and at least two surfactants selected from the group comprising alkyl sulphates: OP-20-based oxyalkylated ALKYLPHENOLS and Serax-40 (Stearic -40") based on ethoxylated fatty acids and products of acetyltyrosine tall oil, taken in equal quantities in the following ratio of components, wt.%:

Dye Aniline black - 2-16

Glycerin - 26-34

Heteropolyanions - 0,05-1

At least two surfactants, taken in equal quantities - 2-4

Distilled water - Rest

In addition, the composition for printing inks for inkjet printers to enhance color may contain additional indicator of Crystal violet in the amount 0,00 Adelaide fact, when its content is less than 2 wt. % deteriorates the sharpness of the print, and its content more than 16 wt.% leads to lower aggregate stability of the paint.

The optimum content of heteropolysaccharide that improves the light fastness of the print is determined by the fact that the effect of light printing does not occur when the content is less than 0.05 wt.%, and when its content is more than 1 wt.% leads to agglomeration of the particles of printing ink.

At the same time as heteropolysaccharide can be used with the same technical result of heteroalicyclic, for example, 12-molybdophosphoric acid (heteroalicyclic brand X. H.), 12 molybde-2-windowsphone acid, 6-molybde-4-tungsten-2-windowsphone acid, and salts of heteropolyacids, such as 6-molybdopterin ammonium 6-wolframtones potassium, 12-molybdopterin sodium.

The purpose of glycerol in the composition is the validation of printing ink hardiness to -22oC. glycerin Content of 34 wt.% increases the viscosity of printing ink, which, in particular, hinders the operation of the inkjet cartridge.

The content in the composition of surface-active substances (surfactants) less than 2 wt. % leads to aggregate Neue is giving not less than 4 to 106Ohms, which is very important when using printing inks in inkjet printers. For the latter reason, in the production of printing inks for inkjet printers use distilled water. To the invention, the tested surfactants, such as alkylsulfate, (namely vitaminswhat - (C5H11O)2SO2or alkylene acid or its sodium salt), OP-20-based oxyalkylated ALKYLPHENOLS (Handbook "Surfactants", L. : Chemistry, 1979, S. 305.), "Steelox-40" based on ethoxylated fatty acids and products of oksietilirovannye tall oil (CH3(CH2)16COOH) - (Handbook Ed. by A. A. Abramson, E. D. Shchukin. Surface phenomena and surfactants. L.: Chemistry, 1984, S. 286, 313.; The journal "Advances in chemistry", 11, 1965, 34 so.) According to the authors of the present invention, the above-mentioned surfactants in the proposed composition function as film-forming agents, dispersing agents, stabilizers, which, of course, contributes to the improvement and preservation for a longer period (up to 3 years) performance of the printed ink.

The drawing shows the transmission spectra of the proposed composition 1 and prototype 2. The character of KRI the tx2">

The invention is carried out as follows.

To obtain a printing ink on the proposed composition of the compositions indicated in the table, used the following components: basic dye - Aniline black THE 6-15-752-78; heteroalicyclic brand X. H.; glycerin GOST 6259-52 brand X. H. ; surfactant-vitaminswhat (C5H11O)2SO2) OP-20 GOST 8433-57 or Stearic-40" (CH3(CH2)16COOH); 0.1% solution of Crystal violet indicator MRTU 6-09-5924-69 H. D. A.; Bromophenol blue TU 6-09-311-70 H. H.

In a reactor equipped with a stirrer, heat water to a temperature of 60oWith, dissolve the basic dye - Aniline black, bring to a slow boil and boil until complete dissolution of the basic dye. Cool the solution to 50oC. Then injected glycerin, surfactant, 0.1% solution of Crystal violet indicator or Bromophenol blue, heteroalicyclic. After the addition of each component to produce a thorough mixing. The use of other alkyl sulphates, heteropolyacids and their sodium salts leads to the same technical result.

Data characterizing the quality of the printed colors shown in the table.) - Rev. tests showed what printing ink 4 times withstand freezing and thawing without loss of original properties, which makes the paint off-season a product compared to the prototype. The increase of storage period of more than 3 times is of crucial importance for the full realization of the printing ink. Lightfastness (see drawing) and the resistance according to GOST 26-160-84 (see table) print enable to increase the stability of operation and storage of printed products in comparison with the prototype.

1. Composition for printing inks for inkjet printers containing the dye, glycerine, and water, characterized in that as a dye it contains aniline black, as water - distilled water, and optionally also heteropolyanions as an agent that improves the light fastness of printing, and at least two surfactants selected from the group comprising alkyl sulphates, OP-20 and Stearic-40, taken in equal quantities, in the following ratio, wt. %:

Dye aniline black - 2 - 16

Glycerin - 26 - 34

Heteropolyanions - 0,05 - 1

At least two surfactants, taken in equal quantities - 2 - 4

3. The composition according to p. 1, characterized in that it additionally contains bromophenol blue in the amount of 0.003 to 0.005 wt. %.

 

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