Method of making an aqueous dispersion of fluoropolymers
    1.
    发明授权
    Method of making an aqueous dispersion of fluoropolymers 失效
    制备含氟聚合物的水性分散体的方法

    公开(公告)号:US06794550B2

    公开(公告)日:2004-09-21

    申请号:US09914507

    申请日:2001-08-28

    IPC分类号: C08J303

    摘要: The invention provides a process for removing steam-volatile fluorinated emulsifiers in their free acid form, from aqueous fluoropolymer dispersions. The process comprises adding a nonionic emulsifier, to the aqueous fluoropolymer dispersion and, at a pH-value of the aqueous fluoropolymer dispersion below 5, removing steam-volatile fluorinated emulsifier by distillation until the concentration of steam-volatile fluorinated emulsifier in the dispersion reaches the desired value.

    摘要翻译: 本发明提供一种从含氟聚合物水分散体中除去其游离酸形式的挥发性挥发性氟化乳化剂的方法。 该方法包括向含氟聚合物水分散体中加入非离子乳化剂,并且在含氟聚合物水分散体的pH值低于5的情况下,通过蒸馏除去挥发性挥发性氟化乳化剂直到分散体中蒸汽挥发性氟化乳化剂的浓度达到 所需值。