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    Smooth flexible powder coatings
    2.
    发明公开
    Smooth flexible powder coatings 审中-公开
    Glatte，biegsame Pulverbeschichtungen

    公开(公告)号：EP1411093A1

    公开(公告)日：2004-04-21

    申请号：EP03255814.0

    申请日：2003-09-17

    申请人： ROHM AND HAAS COMPANY

    发明人： Ilenda, Casmir Stanislaus ,  Spera, Michael Louis ,  Tullos, Gordon L. ,  Daly, Andrew T.

    IPC分类号： C09D5/03

    CPC分类号： C09D5/037 ,  C09D163/00 ,  Y10S525/902

    摘要： The present invention, a powder composition for making powder coatings comprising one or more than one curable polymer or resin and an agglomerate of a core-shell polymer, wherein the agglomerate of a core-shell polymer has an average particle size of from 5 to 190 microns, preferably from 10 to 127 microns. The powders in accordance with the present invention provide a cured powder coating that is flexible, smooth, and which may be applied in a thickness of only from 0.3 to 8 mils. In a preferred embodiment of making a powder in accordance with the present invention, the agglomerate is cryoground to form a reduced agglomerate prior to adding it into a powder as a post-blend or a powder-forming mixture as a preblend. The preferred core-shell polymer for use in accordance with the present invention comprises an acrylic impact modifier having a poly(methyl methacrylate) shell and a poly(butyl acrylate) core. Further, the preferred curable polymer or resin powder is an epoxy resin, wherein the powder composition is a low temperature curing one component powder composition which cures at from 107 to 149 degrees C.

    摘要翻译： 粉末组合物（C1）包含至少一种可固化聚合物或树脂和芯 - 壳聚合物（P1）的附聚物。 （P1）平均粒度为5〜190（优选为10〜127）微米。 包括（C1）的独立权利要求，涉及：（1）冷冻研磨（P1）以形成还原（P1）; （2）将还原的（P1）与至少一种可固化的聚合物或树脂一起挤出以形成挤出物; 和（3）冷却和研磨挤出物。