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    • 7. 发明申请
    • POLYESTER POWDER COATINGS
    • 聚酯粉末涂料
    • US20140072802A1
    • 2014-03-13
    • US13857516
    • 2013-04-05
    • Eduard A. Stefanescu
    • Eduard A. Stefanescu
    • C09D5/03
    • C09D5/03C08G18/798C08G59/3245C08G59/4276C08G2150/20C09D5/031C09D5/033C09D163/06C09D175/06Y10T428/2982
    • Powder coating compositions are comprised of particles having a diameter of from about 20 μm to about 250 μm comprising: (1) a hydroxyl- and/or carboxyl-terminated polyester having a number average molecular weight of from about 1000 to about 6000 and a dynamic shear viscosity of less than 5000 cPs; (2) from about 1% to about 50% by weight of the polyester of a cross-linking agent capable of reacting with the terminal groups of the polyester and wherein the powder coating composition has a density of from about 0.95 g/cm3 to about 1.8 g/cm3. These compositions cure rapidly and provide coatings having superior physical-mechanical properties. The powder coating compositions can be applied by various methods but are particularly useful for thermal spray application methods.
    • 粉末涂料组合物由直径约20μm至约250μm的颗粒组成,包括:(1)数均分子量为约1000至约6000的羟基和/或羧基封端的聚酯和动态 剪切粘度小于5000cPs; (2)约1%至约50%重​​量的能够与聚酯端基反应的交联剂的聚酯,其中该粉末涂料组合物的密度为约0.95g / cm 3至约 1.8 g / cm3。 这些组合物快速固化并提供具有优异物理机械性能的涂层。 粉末涂料组合物可以通过各种方法施加,但对热喷涂施用方法特别有用。