申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US04988788A1
公开(公告)日:1991-01-29
The room temperature-curable coating composition comprises, as the resinous vehicle thereof, a copolymer prepared by the radical copolymerization of a ternary monomeric mixture composed of (A) 20-80% by weight of an alkyl (meth)acrylate, e.g., methyl methacrylate, (B) 10-78% by weight of an oligomeric organopolysiloxyanylalkyl (meth)acrylate, e.g., 1,1,1,3,5,5,5-heptamethyl-3-(3-methacryloxypropyl) trisiloxane, and (C) 2-30% by weight of an organosilane compound having at least one hydroxyzable group and a radical-polymerizable unsaturated group, e.g., 3-methacryloxypropyl trimethoxy silane. The coating composition gives a cured coating film having outstandingly high weatherability and resistance against ultraviolet light, water and chemicals in comparison with conventional room temperature-curable acrylic resin-based coating compositions.
该室温固化涂料组合物的树脂载体是由一种三元单体混合物的自由基共聚物制备而成,该混合物包括(A)20-80%重量的烷基(甲基)丙烯酸酯,例如甲基丙烯酸甲酯,(B)10-78%重量的寡聚有机聚硅氧烷基丙烯酸酯,例如1,1,1,3,5,5,5-庚基-3-(3-甲基丙烯酸丙酯基)三硅氧烷,和(C)2-30%重量的具有至少一个可水解基团和一个自由基聚合不饱和基团的有机硅烷化合物,例如3-甲基丙烯酸丙酯基三甲氧基硅烷。与传统的室温固化丙烯酸树脂基涂料组合物相比,该涂料组合物形成的固化涂层膜具有极高的耐候性和抗紫外线、水和化学品的能力。