Method of agglomerating polytetrafluoroethylene powder
    5.
    发明授权
    Method of agglomerating polytetrafluoroethylene powder 失效
    聚合聚四氟乙烯粉末的方法

    公开(公告)号:US4143110A

    公开(公告)日:1979-03-06

    申请号:US813867

    申请日:1977-07-08

    IPC分类号: C08J3/12 B01J2/14

    CPC分类号: C08J3/12 C08J2327/18

    摘要: Finely ground polytetrafluoroethylene molding powder with or without a filler is subjected to high speed agitation in the presence of a medium consisting essentially of water and a hydrophobic organic liquid at a ratio of 0.5 to 1 liter per 1 Kg of the resin to agglomerate it. Hydrophobic organic liquids mean organic liquid which dissolve less than 15 wt. % in water at the temperature of agglomeration.The volumetric ratio of the organic liquid to water is in a range of 2 to 1/2.The agglomerated product having narrow particle size distribution and high bulk density and free flowing property can be obtained by the agitation for short time.