Powder coating of epoxy group-containing vinyl copolymers with different Tg's and polycarboxylic acid
    3.
    发明授权
    Powder coating of epoxy group-containing vinyl copolymers with different Tg's and polycarboxylic acid 有权
    具有不同Tg和聚羧酸的含环氧基的乙烯基共聚物的粉末涂料

    公开(公告)号:US06844397B2

    公开(公告)日:2005-01-18

    申请号:US10142879

    申请日:2002-05-13

    摘要: The present invention provides a powder coating composition, which can ensure excellent smoothness, scratch resistance, water resistance and humidity resistance, when formed into a thin film, and a coating film forming method. The powder coating composition contains an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40° C. or higher and a number-average molecular weight of 1,000 to 2,500, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0° C. or lower, and a polycarboxylic acid (C). 30 to 90% by weight of a polymerization unit of the epoxy group-containing vinyl copolymer (B) originates in a methacrylic acid alkyl ester (b-1) which has an alkyl group having 8 or more carbon atoms.

    摘要翻译: 本发明提供一种粉末涂料组合物,其可以在形成薄膜时确保优异的平滑性,耐刮擦性,耐水性和耐湿性,以及涂膜形成方法。 粉末涂料组合物含有玻璃化转变温度为40℃以上,数均分子量为1,000〜2,500的含环氧基的乙烯基共聚物(A),含有环氧基的乙烯基共聚物(B)具有 玻璃化转变温度为0℃以下,多元羧酸(C)。 30〜90重量%的含环氧基乙烯基共聚物(B)的聚合单元来源于具有碳原子数为8以上的烷基的甲基丙烯酸烷基酯(b-1)。