SU1298227A1 - Water-thinned printing ink - Google Patents

Abstract

The invention relates to water-based printing inks used in printing when printing by means of intaglio, flexographic and offset printing on paper, wood-fiber, primed chipboard, asbestos fibers and other similar materials. The invention makes it possible to increase the durability of colorful prints to the action of coating varnish (up to 5 points) and their intensity by introducing into the composition the composition, wt.% G pigment 6-25, ethyl cellosolve and / or butyl cellosolve 2-10, thickener 59.5 -75,4, 8-15 wt.% Mixture of copolymers of styrene with maleic anhydride, mol. m. 150000 and mol. m, 500,000 at their ratio (in j combination with 0.2–0.4 wt.% sodium polyphosphate and 0.1–0.4 wt.% silicon dioxide, modified with dimethyldichlorosilane bm. 3 tab. (Loo s 00 go IND m

Description

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The invention relates to printing, in particular, to water-borne printing inks, and can be used for reproducing in depth, facexographic printing of wood texture, fabric, marble, for making failures and other multi-pattern drawings on paper, wood-fiber, primed wood texture. - gum, asbestos fiber plates and other similar substrates on role and sheet machines of gravure, flexographic and offset printing.

The purpose of the invention is povopenie durability of colorful prints to the action of coating varnish and their intensity.

In the paint using a mixture of styrene-maleic anhydride copolymers mol. masses of 150,000 and 500,000 with their ratio in the mixture (3-5): 1, respectively. The ratio of styrene and maleic anhydride in the copolymer is 1: 1

Before use, the copolymers are neutralized with 25% aqueous ammonia solution to a pH of 8-10. The solvent used is a mixture of water and aliphatic alcohol with a ratio in the mixture from 50:50 to 90: 10.

In addition, dimethylamine polyphosphate technical, silica modified with dimethyldichlorosilane, brand AM-1-300, alkali-resistant pigments such as phthalocyanine, azo pigments, iron oxide, crown, and soot are used in the paint.

The compositions of the proposed paint are given in table. one.

The paint is prepared in a ball mill (attritor or bead mill). The copolymer is preliminarily dissolved in a solvent according to the recipe, the solution is loaded into an attritor, ethyl cellosolve and / or butyl cellosolve, pigment, sodium polyphosphate and silicon dioxide are added and dispersed to a particle size of not more than 10 µm.

Known paint is prepared in a similar manner.

Before printing, the inks are diluted with water to viscosity 18-28 seconds according to VZ-4.

The resulting paint is applied to the base paper 150x220 mm in size with a spiral doctor blade 6 µm in depth (doctor blade number 12). Prints are dried for 1 hour under natural conditions, then dried.

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five

,

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impregnating solution composition, mac.h:

Carbamideform-aldehyde resin PMF 100 Polyether emulsion 2.5 Formic acid 5.0 Ammonium chloride 1.5 Cumene hydroperoxide 0.0013 Drinking water 4.0

Dry at 160-170 ° C and press-dry the sample with a colorful image to a chipboard or fiberboard.

Then a polyester lacquer of PE-246 of the composition, mac.h is applied: A solution of polyester-maleate resin in styrene

Cobalt naphthenate solution in styrene Cumene hydroperoxide Paraffin solution in styrene and after drying get

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1.0 3.0

1.0

ready from,

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five

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Delie in the form of a plate.

The strength of a colorful impression to the effect of a top coat varnish is determined by the number of colored circles of filter paper, the intensity of the colorful impressions on the densitometer D-1, and the optical density of the colorful impressions obtained on an in-depth proboprotective printing machine from printing plates of various etching depths, adhesion a colorful imprint to a polyester surface varnish on the maximum height of the dropping load, at which no exfoliation of the polyester layer from the colorful one is observed, the heat resistance of colorful prints s of the present technical material directs 13-314 / 318-14-82 temperature at which deformation of a graphic image ink impression resistance to the action of the impregnating solution in the degree of coloration of the impregnating solution.

The test results are summarized in table. 2 and 3.

Claims (1)

Invention Formula Water-borne printing ink, including; and styrene copolymer with maleic anhydride, pigment, ethyl cellosolve and / or butyl cellosolve, and a solvent that differs 3129 By the fact that, in order to increase the durability of color prints to the action of coating varnish and their intensity, it contains as a copolymer of styrene with maleic anhydride a mixture of styrene copolymers with maleic anhydride with a mole of 150,000 and a mole. mass 500000 with their mass ratio (3-5): respectively, and additionally sodium polysphosphate and silica modified with dimethyldichlorosilane in the following ratio of components, May. % A mixture of copolymers of styrene with maleic anhydride with a mole, a mass of 150,000 and a mole, - mass of 500,000 in the ratio (3-5): Pigment Ethyl cellosolve and / or butyl cellosolve. Silicon Dioxide Modified by Dimethyl Dichlorosilane Polyphosphate Sodium Pa Table 3