Primer composition, coating method, and coated article
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsKoichi Higuchi, Masahiro Furuya, Masaaki Yamaya
Life of this patent
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Abstract
A primer composition comprises (A) a vinyl copolymer obtained through copolymerization of (a-1) a UV-absorbing vinyl monomer, (a-2) an alkoxysilyl group-containing vinyl monomer, and (a-3) another copolymerizable monomer, (B) a curing agent, and (C) a thermoplastic vinyl resin having a Tg of at least 80° C. Polycarbonate resin articles, when covered with an undercoat of the primer composition and an overcoat of an organopolysiloxane composition, exhibit improved transparency, mar resistance, weather resistance, and chemical resistance and find outdoor use as vehicle and building windows and windshields.
Claims13
A primer composition comprising,
- (A) a vinyl copolymer obtained through copolymerization of (a-1) 5 to 40% by weight of a UV-absorbing vinyl monomer, (a-2) 1 to 50% by weight of an alkoxysilyl group-containing vinyl monomer, and (a-3) 10 to 94% by weight of another monomer copolymerizable with the foregoing monomers,
- (B) a curing agent capable of reacting with the vinyl copolymer (A), and
- (C) a thermoplastic vinyl resin having a glass transition temperature of at least 80° C.
Dependencies are inferred from the claim text.