| 摘要 |
PURPOSE:To provide the titled composition effective for prevention of the deterioration of undercoating due to water, ultraviolet light, etc., outstanding in protective effect against scratching, for use in coating on automobiles, etc., comprising specified proportion of ultraviolet absorber and aqueous dispersion containing an emulsion polymerization product having specific glass transition temperature. CONSTITUTION:(A) An aqueous dispersion containing a polymer with a glass transition temperature -10-40 deg.C prepared by emulsion polymerization of 100pts. wt. of a monomer mixture made up of (i) 70-95pts.wt. of a 1-4C alkyl ester of (meth)acrylic acid, (ii) 5-20pts.wt. of an alpha,beta-monoethylenic unsaturated carboxylic acid, and (iii) 0-25pts.wt. of a copolymerizable alpha,beta-monoethylenic monomer and (B) an ultraviolet absorber are blended in a weight ratio 100:0.1-100:5 (on a solid basis) to obtain the objective composition not impairing undercoating film in the protective coating operation, outstanding in workability, and also removable with an aqueous alkali when unnecessary.
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