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    • 1. 发明授权
    • Preparation of fluoroelastomer latex with mixture of mono- and di-esters of phosphoric acid
    • 用磷酸的单酯和二酯的混合物制备含氟弹性体胶乳
    • US3886108A
    • 1975-05-27
    • US41566673
    • 1973-11-14
    • DU PONT
    • SNOW JR AUSTIN MATTHEW
    • C08J3/07C08F45/24
    • C08J3/07C08J2327/12
    • A fluoroelastomer latex having beneficial utility for the manufacture of fluoroelastomer films can be prepared by (A) forming a solution in a volatile organic solvent of a vinylidene fluoride copolymer elastomer which has been isolated from an emulsion made by an aqueous emulsion copolymerization reaction, (B) mixing the copolymer solution with an aqueous solution of a particular anionic surfactant to form an aqueous dispersion of the copolymer, said surfactant being a specified mixture of mono and di esters of phosphoric acid with nonylphenoxypolyethyleneoxyglycol having an average molecular weight of about 4,000-6,000, (C) subjecting the resulting dispersion to distillation to remove the organic solvent, (D) creaming the resulting latex and (E) separating the creamed latex.
    • 可以通过(A)在通过水乳液共聚反应制备的乳液中分离出的偏二氟乙烯共聚物弹性体的挥发性有机溶剂中形成溶液(B(B))来制备具有用于制造含氟弹性体膜的有利实用性的含氟弹性体胶乳 )将共聚物溶液与特定阴离子表面活性剂的水溶液混合以形成共聚物的水分散体,所述表面活性剂是磷酸的单酯和二酯与平均分子量为约4,000-6,000的壬基苯氧基聚乙氧基二醇的特定混合物, (C)使得到的分散体蒸馏除去有机溶剂,(D)乳化所得胶乳和(E)分离乳化胶乳。