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    • 4. 发明授权
    • Thermosetting powder coating composition
    • 热固性粉末涂料组合物
    • US06875815B2
    • 2005-04-05
    • US10445830
    • 2003-05-28
    • Mitsuyuki MizoguchiYoshiharu Hirose
    • Mitsuyuki MizoguchiYoshiharu Hirose
    • C08G59/42C09D5/03C09D125/08C09D129/00C09D133/14C09D135/00C09D163/00C08F8/00C08L25/02C08L37/00
    • C09D163/00C08L2666/04
    • Disclosed is a thermosetting powder coating composition comprising (A) a glycidyl group-containing acrylic resin obtained by (co)polymerizing monomers containing an ethylenically unsaturated monomer having a glycidyl group and/or a β-methylglycidyl group, (B) a polycarboxyl curative, and (C) an alcohol adduct of a styrene/maleic anhydride copolymer. Also disclosed are a cross-linked cured film of the composition and a process for preparing the composition. According to the invention, blending efficiency and dispersibility of the components of a powder coating, particularly those between the resin component and the curative component, are improved without changing a conventional production process of a powder coating, i.e., a process consisting of melt blending, cooling solidification, pulverization and sieving, and thereby a thermosetting powder coating composition, which is capable of forming a cross-linked cured film improved in appearance properties (high gloss, etc.), physical properties (hardness, scratch/mar resistance, etc.), and chemical properties (acid resistance, solvent resistance, etc.), particularly in scratch/mar resistance and/or chemical properties, and having a 60° gloss value of not less than 80, and which is favorably used for coating of automotive bodies and automotive parts, can be provided.
    • 公开了一种热固性粉末涂料组合物,其包含(A)通过(共)聚合含有具有缩水甘油基和/或β-甲基缩水甘油基的烯属不饱和单体的单体获得的含缩水甘油基的丙烯酸树脂,(B)聚羧基固化剂, 和(C)苯乙烯/马来酸酐共聚物的醇加成物。 还公开了组合物的交联固化膜和制备该组合物的方法。 根据本发明,粉末涂料的组分的混合效率和分散性,特别是树脂组分和固化剂组分之间的组分的混合效率和分散性得到改善,而不改变常规的粉末涂料的生产方法,即熔融共混, 冷却固化,粉碎和筛分,从而可以形成改善外观性能(高光泽度等),物理性能(硬度,耐擦伤/耐擦伤性等)的交联固化膜的热固性粉末涂料组合物 ),化学性质(耐酸性,耐溶剂性等),特别是耐划痕/耐擦伤性和/或化学性质,并且具有不小于80°的60°光泽值,并且其有利地用于汽车涂料 可以提供车身和汽车零件。