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    • 8. 发明公开
    • Process for producing vinyl ester polymers and process for producing vinyl alcohol polymers
    • 一种用于生产乙烯基酯聚合物及其制备方法的乙烯醇聚合物的方法。
    • EP0460502A2
    • 1991-12-11
    • EP91108682.5
    • 1991-05-28
    • Kuraray Co., Ltd.
    • Fujiwara, NaokiTerada, KazutoshiMaruyama, Hitoshi
    • C08F263/00C08F2/22C08F8/12
    • C08F261/04C08F8/12C08F263/00C08F263/04C08J5/18C08F218/00C08F218/04C08F118/08
    • There is disclosed a process for producing a vinyl ester polymer having a high degree of polymerization at a high efficiency, which process comprises subjecting a vinyl ester monomer to seed polymerization by the use of a vinyl ester polymer emulsion as a seed emulsion under the conditions in which the charge of a water-soluble initiator per unit volume (1 liter) of reactant liquid charge is 1 x 10⁻⁸ to 2 x 10⁻⁴ mol, and the charge of the water-soluble initiator per one particle of the vinyl ester polymer particles in the seed emulsion is 1 x 10⁻²⁸ to 1 x 10⁻²⁰ mol, and a process for producing a vinyl alcohol polymer at a high efficiency from the vinyl ester polymer thus obtained.
      According to these processes of the present invention, both a vinyl ester polymer and vinyl alcohol polymer each having a higher degree of polymerization can be produced with ease on an industrial scale.
    • 有圆盘游离缺失一种生产以高效率,该方法包括使乙烯基酯单体通过在使用乙烯基酯聚合物乳液作为种子乳液的条件下进行接种聚合具有高聚合度的乙烯基酯聚合物 其中电荷每反应物液体的电荷的单位体积(1升)的水溶性引发剂的是1×10 < - > <8>至2×10 < - > <4>摩尔,并且电荷的水溶性 每种子乳液中的乙烯基酯的聚合物颗粒的一个颗粒的引发剂为1×10 < - > <2> <8>到1×10 < - > <2> <0>摩尔,用于制备乙烯醇的方法 聚合物在由乙烯基酯聚合物的高效率如此获得。 。根据本发明的合成方法,这两个乙烯基酯聚合物,并且每个具有较高聚合度的乙烯醇聚合物可以容易地制造上在工业规模。