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    • 1. 发明授权
    • PROCESS FOR PRODUCING FILLER-CONTAINING POLYTETRAFLUOROETHYLENE GRANULE
    • 生产含填料的聚四氟乙烯颗粒的方法
    • EP1857492B1
    • 2010-12-29
    • EP06715209.0
    • 2006-03-03
    • Asahi Glass Company, Limited
    • HOSHIKAWA, JunNOMURA, MasumiTATE, Noriharu
    • C08J3/16
    • C08J3/205C08J3/12C08J3/212C08J2327/18Y10S524/904
    • A process for producing filler-containing polytetrafluoroethylene granules according to an underwater agitation granulation method, in which there can be obtained filler-containing polytetrafluoroethylene granules being reduced in detachment of filler and excelling in fluidity and in which any discharge of polytetrafluoroethylene emulsion into waste liquid can be avoided. There is provided a process for producing filler-containing polytetrafluoroethylene granules characterized in that in the stage of granulation of a mixture of polytetrafluoroethylene powder and a filler by agitating in water in the presence of a liquid organic matter hardly soluble in water, a polytetrafluoroethylene emulsion and a coagulant are added to thereby effect coagulation of the polytetrafluoroethylene emulsion on a surface layer of filler-containing polytetrafluoroethylene granules.
    • 根据水中搅拌造粒法生产含填料的聚四氟乙烯颗粒的方法,其中可以获得含填料的聚四氟乙烯颗粒,其中填料的分离减少并具有优良的流动性,并且其中任何聚四氟乙烯乳液排放到废液中 应避免。 提供了一种生产含填料的聚四氟乙烯颗粒的方法,其特征在于在聚四氟乙烯粉末和填料的混合物通过在水中几乎不溶于水的液体有机物质存在下搅拌进行造粒的阶段,聚四氟乙烯乳液和 加入促凝剂,从而使聚四氟乙烯乳液在含填料的聚四氟乙烯颗粒的表面层上凝结。