Electrophoretic coating composition containing a heat curable acrylate resin a fine particulate copolymer and a plasticizer

Abstract

Abstract AN ELECTROPHORETIC COATING COMPOSITION USEFUL IN PREPARING TEXTURED COATINGS IS PREPARED BY EMULSIFYING A COPOLYMER COMPONENT II IN ALKALINE AMMONIUM AND/OR STRONG ORGANIC NITROGEN BASES IN THE PRESENCE OF WATER TO A STABLE DISPERSION. THE COPOLYMER COMPONENT II TO 10-25 PERCENT BY WEIGHT OF THE TOTAL COMPOSITION AND HAS THEREIN (A) 60-95 PERCENT BY WEIGHT STYRENE, (B) 0.5-10 PERCENT BY WEIGHT OF A,B-UNSATURATED DICARBOXYLIC ACID HAVING 3-5 CARBON ATOMS AND (C) 4.5-30 PERCENT BY WEIGHT OF A,B-VINYL OR A,B-VINYLIDENE COMPOUND COPOLYMERIZED THEREWITH. 15-20 PERCENT BY WEIGHT OF A PLASTICIZER COMPONENT IIII IS ADDED TO THE DISPERSION OF COMPONENT II AT A PH OF AT LEAST 8.5 THE PLASTICIZERS OF COMPONENT III ARE COMPATIBLE WITH COMPONENTS II AND THE LATER-MENTIONED COMPONENT I, SUCH AS ESTERS OF PHTHALIC ACID, ISOPHTHALIC ACID, TEREPHTHALIC ACID, ADIPIC ACID, SEBACIC ACID, GLYCOLIC ACID, TARTARIC ACID, CITRIC ACID, RICINOLEIC ACID AND MIXTURES THEREOF. TO THE DISPERSION OF COMPONENTS II AND III A SOLUTION OF ACRYLATE RESIN COMPONENT I IN ORGANIC SOLVENTS ADDED AND THE PH IS ADJUSTED TO 8.2$0.3. ACRYLATE RESIN COMPONENT I IS 60-70 PERCENT BY WEIGHT OF THE COMPOSITION AND CONTAINS (A) 50-90 PERCENT BY WEIGHT OF AN ESTER OF ACRYLIC OR METHACRYLIC ACID WITH AN ALIPHATIC MONOALCOHOL HAVING 1-8 CARBON ATOMS, (B) 1-15 PERCENT BY WEIGHT OF AN A,B-UNSATURATED DICARBOXYLIC ACID HAVING 3-5 CARBON ATOMS, AND (C) 5-49 PERCENT BY WEIGHT OF AN A-B-VINYL OR A-B-VINYLIDENE COMPOUND COPOLYMERIZED THEREWITH. THE DISPERSION OF COMPONENTS I, II, AND III IS DILUTED WTH WATER TO A SOLIDS CONTENT OF ABOUT 5-20 PERCENT.

Inventors

• 👤 P Fritsche
• 👤 H Hulsmann

Bibliographic Details