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    • 17. 发明授权
    • Vinyl chloride resin composition for powder molding
    • 用于粉末成型的氯乙烯树脂组合物
    • US5994439A
    • 1999-11-30
    • US73341
    • 1998-05-06
    • Toshio MasudaManabu OgiwaraHideaki HayashiJunzo UkaiHideo Nishimura
    • Toshio MasudaManabu OgiwaraHideaki HayashiJunzo UkaiHideo Nishimura
    • C08K5/04C08K5/10C08K5/12C08L27/06C08J5/10
    • C08K5/12C08L27/06C08L2205/02
    • Provided is a vinyl chloride resin composition for powder molding comprising:(1) 100 parts by weight of a vinyl chloride resin powder having an average polymerization degree p of 600 to 3000 and an internal pore volume of 0.20 ml/g or more,(2) 80 to 150 parts by weight of a trimellitic ester having an alkyl group with a principal chain having an average carbon number n of 6 to 9, and(3) 5 to 25 parts by weight of a fine vinyl chloride resin having an average polymerization degree q of 400 to 1300 and a primary grain size distribution of two modes in which a smaller mode falls in a grain size range of 0.1 to 0.4 .mu.m and a larger mode falls in a grain size range of 0.9 to 1.4 .mu.m,wherein the parts by weight L of the trimellitic ester shown in (2), p and n each described above have the relation satisfying an equation (I):5
    • 本发明提供一种粉末成型用氯乙烯系树脂组合物,其特征在于:(1)将100重量份平均聚合度p为600〜3000,内孔体积为0.20ml / g以上的氯乙烯树脂粉末,(2 )80〜150重量份具有平均碳数n为6〜9的主链的烷基的偏苯三酸酯,(3)平均聚合度为5〜25重量份的氯乙烯系树脂 度q为400〜1300,其中较小的模式落在0.1〜0.4μm的晶粒尺寸范围内的两种模式的一次粒度分布,并且较大的模式落在0.9〜1.4μm的晶粒尺寸范围内,其中 (2)中所示的偏苯三酸酯的重量百分数L和上述每个都具有满足式(I)的关系:5 <[{(n-8)x5 + L} / p]×100 <12 (I)该氯乙烯树脂组合物的耐寒性和耐热劣化性得到改善。