| abstract |
PURPOSE: To provide the title coating outstanding in chipping resistance, good in smoothness when used as a base coating in 2-coat-1-bake system, by comprising an acrylic resin emulsion, a specific urethane resin emulsion, and a crosslinking agent. n CONSTITUTION: The objective coating comprising (A) an acrylic resin emulsion (pref., prepared by emulsion polymerization between an acrylic monomer and α,β-ethylenic unsaturated carboxylic acid), (B) a urethane resin emulsion, a self-emulsifiable urethane emulsion produced by aqueous dilution and emulsification, while or after neutralization with a tertiary amine, of a urethane prepolymer 1.1-1.9 in NCO/OH equivalent ratio, produced from (1) an aliphatic and/or alicyclic diisocyanate, (2) a polyetherdiol and/or polyesterdiol 500-5,000 in number-average molecular weight, (3) a low-molecular weight polyhydroxyl compound, and (4) a dimethylolalkanic acid, and (C) a crosslinking agent. n COPYRIGHT: (C)1989,JPO&Japio |