发明名称 |
METHOD OF MAKING A FLUOROPOLYMER |
摘要 |
The present invention provides a method of making a fluoropolymer comprising: (i) providing an aqueous dispersion of fluoropolymer particles by polymerizing one or more fluorinated olefins and optionally one or more fluorinated or non-fluorinated comonomers in an aqueous emulsion polymerization whereby the polymerization is initiated in the absence of a fluorinated surfactant and whereby no fluorinated surfactant is added during polymerization; (ii) recovering the fluoropolymer from the aqueous dispersion thereby obtaining said fluoropolymer and waste water; and (iii) contacting said waste water with an anion exchange resin; or alternatively to steps (ii) and (iii), contacting said aqueous dispersion with an anion exchange resin and subsequently separating said anion exchange resin from said aqueous dispersion.
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申请公布号 |
US2007072985(A1) |
申请公布日期 |
2007.03.29 |
申请号 |
US20060535249 |
申请日期 |
2006.09.26 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
HINTZER KLAUS;JURGENS MICHAEL;KASPAR HARAID;KOENIGSMANN HERBERT;LOCHHAAS KAI H.;MAURER ANDREAS R.;ZIPPLIES TIMAN |
分类号 |
C08L27/12;C08F6/16;C08F214/18 |
主分类号 |
C08L27/12 |
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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