Patent ID: 7795360

Claim:
A coating agent composition comprising: (A) 100 parts by weight of an acrylic copolymer that has a weight-average molecular weight within the range of 3,000 to 100,000 and is obtained by radical-polymerization of the following constituents consisting essentially of: (A1) 100 parts by weight of a silane compound represented by the following general formula (1): CH 2 ═C(R 1 )—COO-Q-SiR 2 n (OR 3 ) 3-n (1) (where R 1 is a hydrogen atom or a methyl group, Q is a bivalent aliphatic hydrocarbon group with 2 to 6 carbon atoms, R 2 is a non-substituted or substituted univalent hydrocarbon group having 1 to 8 carbon atoms, R 3 is an aliphatic hydrocarbon group having 1 to 4 carbon atoms, and n is an integer from 0 to 2); (A2) 80 to 150 parts by weight of one or more vinyl-polymerizable compounds with unsaturated bonds selected from the group consisting of alkylmethacrylate, methylacrylate, ethylacrylate, butylacrylate, 2-(dimethylamino) ethylmethacrylate, 2-(dimethylamino) ethylacrylate, 3-(dimethylamino) propylmethacrylate, 3(dimethylamino) propylacrylate, 2-(diethylamino) ethylmethacrylate, 2-(diethylamino) ethylacrylate, vinyl acetate, methylvinylether, ethylvinylether, methylvinylketone, ethylvinylketone, styrene, β-methylstyrene, p-methylstyrene, and combinations thereof; (A3) 10 to 50 parts by weight of a siloxysilane compound represented by the following general formula (2): CH 2 ═C(R 1 )—COO-Q-Si( 0 SiR 4 3 ) 3 - (2) (where R 1 and Q are the same as defined above, and R 4 is an alkyl group with 1 to 4 carbon atoms); and (B) a catalytic quantity of a condensation-reaction accelerating catalyst.