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    • 3. 发明公开
    • DISPERSION STABILIZER FOR SUSPENSION POLYMERIZATION AND METHOD FOR PRODUCING VINYL RESIN USING SAME
    • VERFAHREN ZUR HERSTELLUNG VON VINYLHARZ DAMIT分散剂稳定剂
    • EP2915827A1
    • 2015-09-09
    • EP13850151.5
    • 2013-11-01
    • Kuraray Co., Ltd.
    • FUKUHARA, TadahitoKUMAKI, Yosuke
    • C08F261/04C08F2/20C08L29/04C08L31/02C08L51/00
    • C08L29/04C08F2/10C08F2/20C08F261/04C08L31/02C08L51/00C08L2201/54C08L2205/03
    • There is provided a dispersion stabilizer for suspension polymerization of a vinyl compound, which is composed of an aqueous emulsion, wherein the aqueous emulsion comprises a solid comprising (A) a polyvinyl alcohol, (B) a polyvinyl ester, and (C) a graft polymer produced by graft-polymerizing a vinyl ester monomer to a polyvinyl alcohol; wherein the amount of (A) the polyvinyl alcohol is 0.1 to 18 % by mass based on the total amount of (A), (B) and (C); wherein the amount of (C) the graft polymer is 7 to 80 % by mass based on the total amount of (A), (B) and (C); and wherein a weight-average molecular weight of the solid as determined by gel permeation chromatography is 1,100,000 or less. Such a dispersion stabilizer for suspension polymerization exhibits excellent polymerization stability and excellent handleability. In addition, a vinyl resin obtained using the dispersion stabilizer for suspension polymerization has good plasticizer absorbency.
    • 提供了一种由水性乳液组成的乙烯基化合物的悬浮聚合分散稳定剂,其中水乳液包含一种固体,其包含(A)聚乙烯醇,(B)聚乙烯酯,和(C)接枝 通过将乙烯基酯单体接枝聚合到聚乙烯醇上制备的聚合物; (A),(B)和(C)的总量为(A)的聚乙烯醇的量为0.1〜18质量%。 其中(C)接枝聚合物的量(A),(B)和(C)的总量为7〜80质量%。 并且其中通过凝胶渗透色谱测定的所述固体的重均分子量为1100,000以下。 这种用于悬浮聚合的分散稳定剂显示出优异的聚合稳定性和优异的可操作性。 此外,使用悬浮聚合用分散稳定剂得到的乙烯基树脂具有良好的增塑剂吸收性。