SU711074A1 - Dye for flexographic printing on polyurethan - Google Patents

Description

(54) PAINT FOR FLEXOGRAPHIC PRINTING ON POLYURETHANE by 37 semicarbaeid groups of the paint layer and polar end groups on the surface of the polyurethane and chemical means between them; high resistance to abrasion (more than 100 cycles) and scratching (5 points on a 5-point system) due to the formation of a colorful network film, 10 -40% calculated on the dry residue, polyurethane dispersion in water is obtained with simultaneous and uniform the supply of a macrodisocyanate and an aqueous solution containing an extension, an emulsifier (surfactant), and a defoamer to the cavitometer, where the dispersion of the macrodiisocyanate occurs and its chain is simultaneously extended to form a polyurethane water dispersion. Macrodiisocyanate is synthesized in the reactor, where a simple or complex oligoether glycol (with a molecular weight of 50O-5000) or their mixture and an aromatic or aliphatic diisocyan or their mixture is loaded at a molar ratio of reagents of 1: 1.2-2 ,, As extension cords, chains hydrazine or hydrazine derivatives (alkyl hydrazines, hydroxyalkyl hydrazine, dihydrazine acids) or aliphatic and aromatic diamines are used at a molar ratio with microdiisocyanate 0.5-1.0: 1. Anionic substances are used as surfactants (salts of high molecular organic acids (oleic, linoleic, tall oil, etc.), alkyl sulfates, alkyl sulfonates (sodium lauryl sulfate, triethanolamine salt of pauryl sulfate, etc.) and cationic sulfate, and - but, di- and tertiary-quaternary ammonium salts. The amount of surfactant 2-8% by weight of the polymer. The maleic resin is a product of the partial esterification with pentaerythritol of the adduct of rosin and fumaric acid. The degree of esterification is such that the obtained rosin-maleine resin has an acid number of 1OO 230. Amines (triethanolamines or diethanolamine) or aqueous ammonia are used as the nitrogenous base. Alkali-resistant pigments (azo pigments, ft-lrcyanine soot, and titanium dioxide) are used as the p1 gram. Aliphatic alcohols - ethic, methyl or isopropyl or x mixture (in any ratio) are used as an organic solvent. The paint may additionally contain its composition ethyldelozolve 1-10 wt.% Polyethylene wax 2-5 wt.%. The invention is exemplified. Example 1. In a ball mill, an attritor or a bead mill) is ready to paint the composition, wt.%: To anifole-maleic resin8 4%% polyurethane dispersion in water 20 Phthalocyanine blue Phthalocyanine pigment Ethyl alcohol8 Triethanolamine2 Water Orestal Prepared is prepared for a brightening solution --43 - 8 Alcohol 8 is ethanol 8). The rosin resin is dissolved in alcohol, nitrogen base is added, and water is thoroughly mixed. The pigment is loaded into the dispersant and 2-2.5 times more into the master. After rubbing the pigment until the particles are smaller than 10 µm, the resulting amount of binder, polyurethane dispersion in water are added and the mixture is stirred for 1 O min. The finished paint is filtered through a sieve 4800-5200 resp / cm. A blue paint is obtained with a viscosity of 18 s according to VZ-4 at. For printing, the ink is diluted with water to viscosity 15c. Example 2. In a manner similar to Example 1, a paint of the composition, wt.% Is prepared: Rosin-maleic 20% polyurethane dispersion in water Titanium dioxide Ethyl alcohol. Diethanolamine Else Get white paint with viscosity 2O with OT-4. For printing, the ink is diluted to a viscosity of 16 seconds. Example 3 Analogously to example 1, a paint was prepared for the composition, wt.%: Rosin-malein 1O% dispersion of polyurethane in water Pigment green phthalo-cyanine Methyl alcohol Triethanolamine

five

P ol ie t silt ova and wax2

WaterEverything

Green paint is obtained with a viscosity of 2O with OT-4. For printing, the ink is diluted with water to a viscosity of 15 seconds.

Example 4 In a manner similar to Example 1, a paint of the composition was prepared, wt.%: Rosin-maleic resin 18

30% polyurethane dispersion in water

Pigment bright red 4F10 Ethyl alcohol6 Isopropyl alcohol 6 Diethanolamine 4 Ethyl cellosolv2 Polyethylene wax2, Water Else A red paint is obtained with a cross section 23 sec according to OZ-4. The ink is diluted for printing to 16 seconds.

Example 5. In a similar manner to Example 1, a paint of the composition, wt.%, Is prepared for an Acifol-Maleic resin-12

25% - “and polyurethane dispersion in water15 Soot PMN-1309 ethyl alcohol9 25% aqueous

3 4 ammonia

3tilcellozolv Else Water

Black paint is obtained with a viscosity of 24 seconds according to VZ-4. For printing, the ink is diluted with water to a viscosity of 15 seconds.

10746

The proposed paint has a high adhesion to polyurethane, and the prints obtained when it is used have good resistance to friction and scratching.

5 NIJU.

Claims (1)

Invention Formula Flexo printing ink 0 on polyurethane, containing rosin-maleic resin, pigment, organic solvent - ethyl, methyl or isopropyl alcohol, nitrogenous base, 25% aqueous ammonia, diyl triethanolamine, and water, so that, in order to increase adhesion to; raskas, as well as increasing the resistance of the impression to abrasion and scratching, it additionally contains 10-4 O% aqueous dispersion of polyurethane, with the following content of components, wt.%: Rosin no male 8-22 resin 1O-4O% water dispersed polyurethane4-20 tan 8-11 Pigment Organic researcher 2-4 Nitrogenous base Rest Water Sources of information taken into account in the examination 1, USSR author's certificate on application No. 25О2221/05, cl. C 09 2) 11/10, 1977 (prototype).