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    • 5. 发明申请
    • CURABLE POWDER FILM-FORMING COMPOSITION EXHIBITING IMPROVED FLOW AND LEVELING
    • 可塑粉末成膜组合物展现出改进的流动和水平
    • WO2003070837A2
    • 2003-08-28
    • PCT/US2003/004773
    • 2003-02-18
    • PPG INDUSTRIES OHIO, INC.
    • BARKAC, Karen A.RAGAN, Deirdre D.RECHENBERG, Karen S.
    • C09D5/03
    • C08K3/22C08K3/36C09D5/037
    • A curable powder film-forming composition is provided, comprising (i) 5 to 95 percent by weight based on the total weight of the film-forming composition of a crosslinking agent; (ii) 5 to 95 percent by weight based on the total weight of the film-forming composition of a polymer containing a plurality of functional groups reactive with the crosslinking agent; and (iii) particles having a mean particle size less than 100 nm. The particles are substantially free of functional groups on the particle surface, and are present in an amount at least sufficient to improve the flow and leveling of the composition when applied to a substrate and cured, as measured by longwave scanning, compared to a similar cured coating without the particles. A multi-component composite coating composition is also provided, comprising a pigmented basecoat and a clear coat. The basecoat and/or clearcoat may be derived from the curable film-forming composition described above. Also provided are coated substrates in which the curable coating compositions or the multi-component composite coating compositions described above are applied to a substrate and cured to form a cured coating.
    • 提供了一种可固化的粉末成膜组合物,其包含(i)基于成膜组合物的总重量为5至95重量%的交联剂; (ii)基于成膜组合物的总重量为5〜95重量%的含有与交联剂反应的多个官能团的聚合物; 和(iii)平均粒度小于100nm的颗粒。 颗粒在颗粒表面上基本上不含官能团,并且存在的量至少足以改善组合物在施加到基底上时的流动和流平,并且通过长波扫描测量,与类似的固化 没有颗粒的涂层。 还提供了多组分复合涂料组合物,其包含着色的底漆和透明涂层。 底涂层和/或透明涂层可以衍生自上述可固化成膜组合物。 还提供了将上述可固化涂料组合物或多组分复合涂料组合物施用于基材并固化以形成固化涂层的涂布基材。