发明名称 |
Process for reducing the amount of fluorinated surfactant in aqueous fluoropolymer dispersions |
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 fluoropolyrner 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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申请公布号 |
US2003220442(A1) |
申请公布日期 |
2003.11.27 |
申请号 |
US20030429387 |
申请日期 |
2003.05.05 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
EPSCH REBEKKA;HINTZER KLAUS;LOHR GERNOT;SCHWERTFEGER WERNER |
分类号 |
C08F6/16;C08L27/12;(IPC1-7):C08L27/12 |
主分类号 |
C08F6/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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