SU891732A1 - Paint for flexographic or deep printing on paper - Google Patents

Description

The invention relates to the field of the printing industry, namely, ink flexo or gravure printing for paper. Known flexographic or gravure ink for paper containing 7-22 wt.% Rosin-based new resin with acid number 100230, 8-15 wt.% Pigment, 1-g4 wt. %% 15-25% aqueous ammonia 4-9 wt.% Polyvinyl butyral, 25-70 wt.% Organic solvent - ethyl, propyl ,. isopropyl alcohol or their mixture, dystilen glycol or dioxane and water 1. The disadvantage of this paint is its short shelf life of 2 months. After this period, the paint coagulates and becomes unusable. The purpose of the invention is to increase the storage time of the paint. This goal is achieved due to the fact that ink for flexographic or intaglio printing for paper additionally contains g-VDroxia magnesium calcium calcium, chloride, sulphate and / or nitr. calcium, magnesium, barium, zinc or aluminum, with the following content of components, wt.%: Rosin-malein resin Pigment 15-25% aqueous solution of ammonia Magnesium hydroxide or calcium, chloride, sulfate and / or nitrate, magnesium, barium, zinc or 0.01-1.4 aluminum Organic 20-50 solvent Remaining Water The table shows the colors you offer. The emission of 11 printing inks on pri1-5 is made according to the following logic. For preparation, the bonding resin-m-resin resin is poured in an organic solution, neutralized with an ammonia solution and thoroughly mixed. Separately dissolve the anicic salt or 7Hdroxide

metal in water. The second solution is added to the first with stirring. About 40% of the binder and pigment are loaded into the dispersant (ball mill, attritor). After rubbing the pigment to a particle size of 5-10 µm, the remaining amount of binder is added over the wedge and the paint is mixed for 15 minutes. After mixing is completed, the finished ink is filtered through a sieve of 4800-5200 holes / cm.

The paints of examples 6.7 are prepared according to the following technology. The inorganic salt is dissolved in an amount of water such that a 5% solution is obtained. The binder is prepared by dissolving the rosin-maleic resin in an organic solvent, neutralizing it with an aqueous solution of ammonia, and then adding the remaining amount of water. About 40% of the binder and pigment are loaded into the dispersant (ball mill, attritor). After grinding the pigment to a particle size of 5–10 µm, metal hydroxide and a 5% aqueous solution of an inorganic salt are added to the wedge, after which the dispersion is continued to a particle size of 5–10 µm through the wedge. Then the remaining amount of binder is added and the paint is mixed for 15 minutes. After stirring is complete, the finished crimson is filtered through a sieve of 4800-5200 sp.

. The paints of examples 4,5 can also be prepared on roll roller machines. For this, rosin-maleic resin is dissolved in ethylene or diethylene glycol at 120-150 ° C. Next, the solution is cooled, an aqueous solution of ammonia is added, mixed thoroughly, and pigment added. The resulting mixture is dispersed on a roller paint-breaking machine to a dispersion of 5-10 microns in a wedge. Before printing, the rubbed anhydrous colorful paste is diluted with an aqueous solution of metal hydroxide or inorganic salt prepared according to a paint formulation.

The shelf life of the paint has increased from 2 months to 12 months.

Rosin malein 15 2813 resin 10 - Pigment xacin 5C Pigment blue Phthalo-12 cyanine O -8 Pigment yellow transparent Soot of the furnace PM-75 Pigment bright red 4Zh Pigment green phthalocyanine Nitrate barium Magnesium hydroxide Calcium Hydroxide Calcium Sulphate; calcium 7.0 20 ethyl alcohol

23 -10

0.9

0.5 0.7 7 21 1 01 0.03

Isopropyl alcohol Ethylene glycol Diethylene glycol Dioxane

Aqueous solution of ammonia (in terms of 25%)

Claims (1)

Water The invention of the ink flexographic or gravure printing paper, containing rosin-maleic resin with an acid number of 100-230, pigment, 15-25% aqueous solution of ammonia, organic solvent - ethyl, n-propyl, isopropyl alcohol or their mixture, Diethylene glycol or dioxa and water, characterized in that, in order to increase the shelf life of the paint, it additionally contains magnesium or calcium hydroxide, chloride, sulfate and / or calcium nitrate, magnesium, barium, zinc or aluminum, with the following content of components, wt.% : K anifolno-maleinovy pitch 8-28 Table continuation 15 - 29 30 39 50 6 3,5 2 4 2 3 up to 100 Pigment 15-25% aqueous ammonia solution Magnesium hydroxide or calcium, chlo-. REED, sulphate and / or nitrate of calcium, magnesium, barium, zinc aluminum cl. 0.01-1.4 Organic solvent 20-50 Water Other Sources of information taken into account during the examination Copyright Certificate of the USSR VC 2717261 09 D 11/10, 1979 (prototype).