申请人:The Dow Chemical Company
公开号:US04431777A1
公开(公告)日:1984-02-14
Block copolymers are prepared having end blocks with random copolymer of styrene and/or alkyl substituted derivatives and alpha-methylstyrene ranges from 1:0.5 to 1:2.5, a central block of a polydiene polymer joins the terminal blocks. The block copolymers contain from 10 to 90 weight percent of polydiene, the remaining portion being of random (alkyl) styrene-alpha-methylstyrene copolymer. The polymers range from medium impact polystyrene type polymer of low polydiene content to thermoplastic elastomers of high polydiene content.
制备了端块为苯乙烯和/或烷基取代衍生物和α-甲基苯乙烯的随机共聚物的嵌段共聚物,其比例范围从1:0.5到1:2.5,中央块为聚二烯基聚合物连接端块。嵌段共聚物含有10至90重量%的聚二烯基,其余部分为随机(烷基)苯乙烯-α-甲基苯乙烯共聚物。这些聚合物的范围从低聚二烯基含量的中等冲击聚苯乙烯型聚合物到高聚二烯基含量的热塑性弹性体。