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    • 73. 发明授权
    • Powder coating composition comprising epoxy group-containing acrylic resin
    • 包含含环氧基的丙烯酸树脂的粉末涂料组合物
    • US06509420B1
    • 2003-01-21
    • US09654975
    • 2000-09-05
    • Yoko HaradaMotoshi InagakiKoji ShimizuNoriyuki Tajiri
    • Yoko HaradaMotoshi InagakiKoji ShimizuNoriyuki Tajiri
    • C08F218
    • C09D133/068Y10S525/934C08L2666/34
    • An epoxy group-containing acrylic resin for a powder coating composition is a copolymer, having a weight-average molecular weight of 3000 to 20000, of a vinyl monomer mixture comprising 10 to 60% by weight of alkyl ester(s) of (meth)acrylic acid, 10 to 60% by weight of epoxy group-containing vinyl monomer(s) and other vinyl monomer(s), said epoxy group-containing acrylic resin having a mean particle diameter in the range of 80 to 800 &mgr;m, including 95% by weight or more of particles satisfying the relation of 1≦R/r≦1.2 wherein R is a long diameter and r is a short diameter of each particle, and including 1000 ppm or less of volatile components, the amount of the particles having long diameters R of less than 62 &mgr;m being 5% by weight or less, that of the particles having short diameters r of more than 1000 &mgr;m being 5% by weight or less.
    • 用于粉末涂料组合物的含环氧基的丙烯酸树脂是重均分子量为3000至20000的乙烯基单体混合物的共聚物,其包含10至60重量%的(甲基)丙烯酸烷基酯, 丙烯酸,10〜60重量%的含环氧基的乙烯基单体和其它乙烯基单体,所述含环氧基的丙烯酸树脂的平均粒径在80〜800μm的范围内,包括95 满足1≤R/ r <= 1.2的关系的颗粒的重量%以上,其中R是长径,r是每种颗粒的短直径,并且包括1000ppm以下的挥发性成分, 具有小于62μm的长直径R的颗粒为5重量%以下,直径r大于1000μm的颗粒的重量比为5重量%以下。