公开(公告)号：US3927142A

公开(公告)日：1975-12-16

申请号：US42597473

申请日：1973-12-19

Applicant: HOECHST AG

Inventor： STROBEL WOLFGANG ,  JAENICKE OTTOKAR ,  SCHUDDEMAGE HORST-DIETER ,  JASTROW HORST

IPC: C08F2/00 ,  C08F255/00 ,  C08F255/04 ,  C08F255/06 ,  C08L23/16

CPC classification number: C08F255/06 ,  C08F212/04 ,  C08F210/14

Abstract: An improved polymer and a process for the preparation of impact resistant styrene graft copolymers. Ethylene-propylenetercomponent-rubber is dissolved in styrene, then acrylonitrile is added to a styrene to acrylo-nitrile ratio of 6/1 to 4/1, the polymerization is carried out in the mass until the end of the phase transition, further acrylonitrile, and optionally further styrene, is added and the polymerization is completed in the mass or in suspension.

Abstract translation: 改进的聚合物和制备耐冲击苯乙烯接枝共聚物的方法。 将乙烯 - 丙烯 - 三元橡胶溶解在苯乙烯中，然后将丙烯腈加入到苯乙烯中，以丙烯腈的比例为6/1〜4/1，聚合在质量上进行直到相变结束 丙烯腈和任选的其它苯乙烯，聚合在质量或悬浮液中完成。

公开(公告)号：CA1090499A

公开(公告)日：1980-11-25

申请号：CA230340

申请日：1975-06-27

Applicant: HOECHST AG

Inventor： SCHUDDEMAGE HORST-DIETER ,  JASTROW HORST ,  BARTH HARRY

IPC: C08F255/00 ,  B29C47/00 ,  C08F255/04 ,  C08F255/06 ,  C08J3/24

Abstract: of the disclosure: There is disclosed a process for preparing impact resistant styrene graft copolymers having improved properties, especially a high gloss. They are obtained by polymerizing a solution of an EPTR in a mixture of styrene and acrylonitrile in one step (mass polymerization) or two steps (mass/ suspension polymerization) in the presence of an organic peroxide and submitting the polymer to a two step extrusion, the first step being carried out at temperatures of from 130 to 240.degree.C, the second step at temperatures of from 200 to 280.degree.C, and providing that during the second extrusion step a quantity of about 0.05 to about 0.5% by weight of the organic peroxide is still present.

公开(公告)号：CA1090500A

公开(公告)日：1980-11-25

申请号：CA268341

申请日：1976-12-21

Applicant: HOECHST AG

Inventor： GORDON WOLFGANG ,  HOFMANN HANS J ,  KRUGER KLAUS ,  SCHUDDEMAGE HORST-DIETER

IPC: C08F255/00 ,  C08F255/04 ,  C08F255/06 ,  C08L51/04

Abstract: of the disclosure: There is disclosed a process for preparing impact resistant styrene graft copolymers having improved properties, especially an excellent combination of toughness, hardness and gloss. They are obtained by polymerizing a solution of an ethylene-propylene-tercomponent rubber in a mixture of styrene and acrylonitrile in one step (mass polymerization) or two steps (mass/suspension polymerization) in the presence of an organic peroxide and subjecting the copolymer obtained to a shear extrusion yielding rubber particles with an average size below 1 .mu.m and thereafter crosslinking said rubber particles, care being taken that an amount of 0.02 to 0.5 weight % of a cross-linking initiator is present when cross-linking starts.