FLUOROPOLYMER POWDER AND METHOD FOR PRODUCING SAME

    公开(公告)号:EP3511362A1

    公开(公告)日:2019-07-17

    申请号:EP17859936.1

    申请日:2017-10-11

    摘要: The invention provides a powder that is easily redispersible in a liquid medium such as water. The powder contains a fluoropolymer. The fluoropolymer contains at least one group A selected from the group consisting of - SO 2 Y, -COOR, -SO 3 X, -SO 2 NR 1 2 , and -COOX, wherein Y is a halogen atom; R is a C1-C4 alkyl group; X is M 1/L or NR 1 4 , where M is a hydrogen atom or an L-valent metal, the L-valent metal being a metal in group 1, group 2, group 4, group 8, group 11, group 12, or group 13 of the periodic table; and R 1 s are each individually a hydrogen atom or a C1-C4 alkyl group. The powder exhibits a dispersion of 50% or higher. The dispersion is calculated by filtering a composition obtainable by mixing the powder with water through a mesh having an opening of 20 µm.

    METHOD FOR PRODUCING AQUEOUS FLUORINE-CONTAINING POLYMER DISPERSING ELEMENT, AND PURIFIED AQUEOUS FLUORINE-CONTAINING POLYMER DISPERSING ELEMENT
    5.
    发明公开
    METHOD FOR PRODUCING AQUEOUS FLUORINE-CONTAINING POLYMER DISPERSING ELEMENT, AND PURIFIED AQUEOUS FLUORINE-CONTAINING POLYMER DISPERSING ELEMENT 审中-公开
    生产含氟水溶性聚合物分散元件的方法和含氟水溶性聚合物分散元件

    公开(公告)号:EP2853548A1

    公开(公告)日:2015-04-01

    申请号:EP13793904.7

    申请日:2013-05-22

    IPC分类号: C08F6/16 C08F14/18

    摘要: An object of the present invention is to provide methods for preparing a fluoropolymer aqueous dispersion that allow efficient removal of iron ions from fluoropolymer aqueous dispersions, and purified fluoropolymer aqueous dispersions. The present invention relates to a method for preparing a fluoropolymer aqueous dispersion, including: step (A) of preparing a fluoropolymer aqueous dispersion comprising a fluoropolymer having at least one selected from the group consisting of - SO 2 Y and -COOR (wherein Y is a halogen, and R is a C1 to C4 alkyl) by emulsion polymerization; step (B) of heating the fluoropolymer aqueous dispersion to 50°C or higher; and step (C) of contacting the fluoropolymer aqueous dispersion with an ion exchange resin for cation exchange after step (B), thereby providing a purified fluoropolymer aqueous dispersion, the fluoropolymer aqueous dispersion being adjusted to pH 7 or lower from the end of the polymerization in step (A) to the end of step (C).

    摘要翻译: 本发明的一个目的是提供用于制备允许从含氟聚合物水分散体中有效除去铁离子的含氟聚合物水分散体和纯化的含氟聚合物水分散体的方法。 本发明涉及含氟聚合物水性分散液的制造方法,其包括以下步骤:(A)制备含有含氟聚合物的含氟聚合物水性分散液,所述含氟聚合物具有选自-SO 2 Y和-COOR(其中Y是卤素 ,并且R是C1至C4烷基)通过乳液聚合; 将含氟聚合物水分散液加热至50℃以上的工序(B) 和在步骤(B)之后使含氟聚合物水分散体与离子交换树脂接触用于阳离子交换的步骤(C),由此提供纯化的含氟聚合物水分散体,从聚合结束将含氟聚合物水分散体调节至pH 7或更低 在步骤(A)中到步骤(C)的结束。