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    • 10. 发明授权
    • Thermosetting powdery coating composition
    • 热固性粉末涂料组合物
    • US5439896A
    • 1995-08-08
    • US128313
    • 1993-09-28
    • Haruki ItoKenzou MaedaNobuyuki MiyazakiMasao UnokiChiaki SagawaMotoi Kamba
    • Haruki ItoKenzou MaedaNobuyuki MiyazakiMasao UnokiChiaki SagawaMotoi Kamba
    • C08G18/62C08K5/00C09D5/46C09D127/12C09D127/18C08L27/12C08L27/18C08L27/20
    • C09D127/12C08G18/6279C08K5/0025C09D127/18Y10S524/904Y10S525/934
    • A thermosetting powdery coating composition which comprises, in admixture: (A) from 40 to 98 parts by weight of a fluorine-containing copolymer, which is a copolymer of a fluoroolefin and a comonomer having a crosslinkable reactive group, e.g., hydroxy, carboxyl, amino and glycidyl groups, containing at least 10% by weight of fluorine and having an intrinsic viscosity of 0.05-2 dl/g (30.degree. C., tetrahydrofuran), a glass transition temperature of 30.degree.-120.degree. C. and a weight loss by heating which does not exceed 2% and (B) from 60 to 2 parts by weight of a curing agent capable of forming crosslinks by reacting with the crosslinkable reactive groups in (A), except for the composition wherein (A) is a hydroxyl group and a weight loss by heating which does not exceed 2% and (B) is a blocked isocyanate compound. The powdery coating composition is excellent in the dispersibility of pigments and efficiency in the coating works therewith and capable of giving a coating film having improved adhesion to a substrate surface, surface luster, impact resistance and insusceptibility to staining.
    • 一种热固性粉末涂料组合物,其包含:(A)40至98重量份的含氟共聚物,其为氟代烯烃和具有可交联反应性基团的共聚单体的共聚物,例如羟基,羧基, 氨基和缩水甘油基,其含有至少10重量%的氟,特性粘度为0.05-2dl / g(30℃,四氢呋喃),玻璃化转变温度为30-120℃,重量 除了不超过2%的加热损失,(B)60至2重量份的能够通过与(A)中的可交联反应性基团反应形成交联的固化剂,除了其中(A)为 羟基,加热失重不超过2%,(B)为封端异氰酸酯化合物。 粉末涂料组合物在颜料的分散性方面优异,并且在其涂料中效率高,并且能够提供对基材表面具有改善的粘附性的涂膜,表面光泽,耐冲击性和不可感染性。