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    • 3. 发明公开
    • METHOD OF MAKING A FLUOROPOLYMER
    • VERFAHREN ZUR HERSTELLUNG EINES FLUORPOLYMERS
    • EP1928922A4
    • 2009-06-03
    • EP06825150
    • 2006-09-26
    • 3M INNOVATIVE PROPERTIES CO
    • HINTZER KLAUSKASPAR HARALDMAURER ANDREAS RKOENIGSMANN HERBERTZIPPLIES TILMANLOCHHAAS KAI HJUERGENS MICHAEL
    • C08F14/18C08F6/16C08F8/00C08F214/18
    • C08F214/18B01J41/05C08F6/16
    • 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.
    • 本发明提供一种制备含氟聚合物的方法,其包括:(i)通过在水乳液聚合中聚合一种或多种氟化烯烃和任选的一种或多种氟化或非氟化共聚单体来提供含氟聚合物颗粒的水分散体,由此引发聚合 在不存在氟化表面活性剂的情况下,在聚合过程中不加入氟化表面活性剂; (ii)从水分散体中回收含氟聚合物,从而得到所述含氟聚合物和废水; 和(iii)使所述废水与阴离子交换树脂接触; 或者选择步骤(ii)和(iii),使所述水性分散体与阴离子交换树脂接触,随后将所述阴离子交换树脂与所述水性分散体分离。