A process for the manufacture of polymer compositions containing a polyvinylarene and EPDM rubber, which process comprises:
(a) dissolving in at least one vinylarene monomer of from 8 to 20% by weight, and preferably from 9 to 18% by weight, relative to the final composition, of at least one EPDM rubber, optionally mixed with a linear (hydrogenated) conjugated diene-vinylarene block copolymer, said block copolymer having a number average molecular weight in the range of from 10,000 to 1,000,000;
(b) prepolymerizing the obtained solution until a polymerization degree of from 0.01 to 25%;
(c) suspending the prepolymerized mass into an aqueous medium which contains at least one suspending agent; and
(d) suspension polymerizing until substantially complete monomer conversion is obtained, optionally in the presence of an expanding agent, and polymer compositions so obtained.
一种制造含有聚
乙烯烯和三元
乙丙橡胶的聚合物组合物的工艺,该工艺包括
(a) 在至少一种
乙烯基树脂单体中溶解至少一种三元
乙丙橡胶,其重量占最终组合物的 8%至 20%,最好是 9%至 18%,可选择与线性(氢化)共轭二烯-
乙烯基树脂嵌段共聚物混合,所述嵌段共聚物的平均分子量在 10,000 至 1,000,000 之间;
(b) 对得到的溶液进行预聚,直至聚合度达到 0.01%至 25%;
(c) 将预聚物悬浮到含有至少一种悬浮剂的
水介质中;及
(d) 悬浮聚合,直至获得基本完全的单体转化,可选择在有膨胀剂存在的情况下进行, 并由此获得聚合物组合物。