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    • 6. 发明申请
    • Surfactant, method of producing a fluoropolymer, fluoropolymer aqueous dispersion
    • 表面活性剂,含氟聚合物的制造方法,含氟聚合物水性分散体
    • US20070142513A1
    • 2007-06-21
    • US11312570
    • 2005-12-21
    • Nobuhiko TsudaYoshinori NanbaYasuhiko SawadaTetsuo Shimizu
    • Nobuhiko TsudaYoshinori NanbaYasuhiko SawadaTetsuo Shimizu
    • C08K5/42
    • C08K5/42
    • The present invention provides a surfactant making it possible to obtain particles comprising a fluoropolymer at a size smaller in diameter in an aqueous dispersion obtained by polymerization in the presence of the same. The present invention is a surfactant comprising a fluorine-containing-sulfobutanedioic-acid-ester derivative represented by the general formula (i): Y—Rf1—(CH2)m—OCOCH(SO3M)-CH2COO—(CH2)n—Rf2—Y  (i) wherein Y represents hydrogen atom or fluorine atom; when Y is hydrogen atom, one of Rf1 and Rf2 is —(CF2CF2)3— and the other is —(CF2CF2)2— or —(CF2CF2)3— and, when Y is fluorine atom, Rf1 and Rf2 are the same or different and each is a divalent hydrocarbon group containing 1 to 4 carbon atoms and containing at least one fluorine atom; m and n are the same or different and each represents an integer of 1 to 3; and M represents NH4, Li, Na, K or H.
    • 本发明提供了一种表面活性剂,其可以获得包含通过在其存在下通过聚合获得的水分散体中的直径小的含氟聚合物的颗粒。 本发明是包含由通式(i)表示的含氟磺基丁二酸 - 酯衍生物的表面活性剂:&lt;线内配方说明=“在线式”末端=“铅”→> Y - (CH 2) - (O 3 M)-CH 2 - (CH 2) &lt;&lt;&lt; COO-(CH 2)&gt;&lt; 2&lt; 2&lt; 2&gt; -Y(i) 其中Y代表氢原子或氟原子; 当Y是氢原子时,Rf 1和Rf 2之一是 - (CF 2 CH 2 CH 2) (CF 2)2 - 或 - (CF 2)2 - - - (CF 2)2 - R 2和R 2可以相同或不同,并且当Y是氟原子时,R f'1和R f'2 < 各自是含有1至4个碳原子并含有至少一个氟原子的二价烃基; m和n相同或不同,各自表示1〜3的整数。 M表示NH 4,Li,Na,K或H.