发明申请
US20050070633A1 Process for reducing the amount of fluorinated surfactant in aqueous fluoropolymer dispersions
审中-公开
用于降低含氟聚合物水分散体中氟化表面活性剂的量的方法
- 专利标题: Process for reducing the amount of fluorinated surfactant in aqueous fluoropolymer dispersions
- 专利标题(中): 用于降低含氟聚合物水分散体中氟化表面活性剂的量的方法
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申请号: US10992961申请日: 2004-11-19
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公开(公告)号: US20050070633A1公开(公告)日: 2005-03-31
- 发明人: Rebekka Epsch , Klaus Hintzer , Gernot Lohr , Werner Schwertfeger
- 申请人: Rebekka Epsch , Klaus Hintzer , Gernot Lohr , Werner Schwertfeger
- 专利权人: 3M Innovative Properties Company
- 当前专利权人: 3M Innovative Properties Company
- 优先权: EPEP02100574.5 20020522
- 主分类号: C08F6/16
- IPC分类号: C08F6/16 ; C08L27/12 ; C08L1/00
摘要:
The present invention provides a process of reducing the amount of fluorinated emulsifier in an aqueous fluoropolymer dispersion by contacting the aqueous fluoropolymer dispersion with an anion exchange resin in a non-fixed resin bed, the process comprising: (a) mixing the aqueous fluoropolymer dispersion with an effective amount of a surfactant so as to stabilize the fluoropolymer dispersion while being contacted with the anion exchange resin; (b) contacting the aqueous fluoropolymer dispersion with an anion exchange resin by agitating the aqueous fluoropolymer dispersion with an effective amount of anion exchange resin for a time of less than 4 hours to reduce the amount of fluorinated emulsifier in the aqueous fluoropolymer dispersion to a desired level; and (c) separating the anion exchange resin from the aqueous fluoropolymer dispersion.
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