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    • 1. 发明申请
    • EXPANDABLE POLYSTYRENE RESIN BEADS, PROCESS FOR THE PREPARATION OF THEM, AND FOAM MADE BY USING THE SAME
    • 可膨胀的聚苯乙烯树脂珠,它们的制备方法和使用它们的泡沫
    • WO1998029485A1
    • 1998-07-09
    • PCT/JP1997004555
    • 1997-12-11
    • KANEKA CORPORATIONOHARA, EiichiYAMAGUCHI, HidehiroNAKAMURA, Kyoichi
    • KANEKA CORPORATION
    • C08J09/22
    • C08J9/18B29B9/10C08J2203/14C08J2325/04C08J2351/00
    • Expandable modified polystyrene resin beads (E) prepared by incorporating a blowing agent (D) into beads of a modified polystyrene resin (C) comprising a polystyrene resin (A) and conjugated diene polymer rubber particles (B) homogeneously dispersed in the resin (A), which beads have such a property that the rubber particles (B) do not undergo any substantial change in the shape during the expansion; and a modified polystyrene resin foam which has cell walls made of a modified polystyrene resin comprising a polystyrene resin and conjugated diene polymer rubber particles dispersed in the resin and a rate of fusion of 50 % or above and in which the rubber particles substantially retain their globular shapes in the cell walls. The foam is equivalent to high-impact polystyrene foams in both crack resistance and rate of fusion and is inexpensive.
    • 通过将发泡剂(D)掺入包含均匀分散在树脂(A)中的聚苯乙烯树脂(A)和共轭二烯聚合物橡胶颗粒(B)的改性聚苯乙烯树脂(C)的珠粒中制备的可发性改性聚苯乙烯树脂珠粒(E) ),这些珠粒具有这样的性质:橡胶颗粒(B)在膨胀期间不会发生形状的任何显着变化; 和改性聚苯乙烯树脂发泡体,其具有由改性聚苯乙烯树脂制成的泡孔壁,该改性聚苯乙烯树脂包含分散在树脂中的聚苯乙烯树脂和共轭二烯聚合物橡胶颗粒,熔融率为50%或更高,并且其中橡胶颗粒基本保持其球形 形状在细胞壁。 泡沫相当于高抗冲聚苯乙烯泡沫,具有抗裂性和熔化速度,并且价格便宜。