- 专利标题: Method for producing aqueous fluorine-containing polymer dispersing element, and purified aqueous fluorine-containing polymer dispersing element
-
申请号: US14403033申请日: 2013-05-22
-
公开(公告)号: US09644055B2公开(公告)日: 2017-05-09
- 发明人: Takashi Yoshimura , Kazuhiro Ohtsuka , Tadashi Ino , Noriyuki Shinoki , Masahiro Kondo
- 申请人: DAIKIN INDUSTRIES, LTD.
- 申请人地址: JP Osaka
- 专利权人: DAIKIN INDUSTRIES, LTD.
- 当前专利权人: DAIKIN INDUSTRIES, LTD.
- 当前专利权人地址: JP Osaka
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2012-117663 20120523
- 国际申请: PCT/JP2013/064245 WO 20130522
- 国际公布: WO2013/176185 WO 20131128
- 主分类号: C08F216/14
- IPC分类号: C08F216/14 ; C08F8/26 ; C08F8/12 ; C08F6/02 ; C08F14/18 ; C08F6/16 ; C08F2/24 ; B01D71/32 ; H01M8/1025 ; H01M8/1039 ; B01D69/02
摘要:
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 —SO2Y 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).
公开/授权文献
信息查询
IPC分类: