公开(公告)号：US4565844A

公开(公告)日：1986-01-21

申请号：US653509

申请日：1984-09-21

申请人： Toshikazu Kasahara ,  Toshifumi Kajiya ,  Tomio Akiyoshi

发明人： Toshikazu Kasahara ,  Toshifumi Kajiya ,  Tomio Akiyoshi

IPC分类号： C08K3/34 ,  C08K5/00 ,  C08K5/098 ,  C08K5/1575 ,  C08K13/02 ,  C08L23/00 ,  C08L51/00 ,  C08L51/02 ,  C08L53/00 ,  C08L77/00 ,  C08L101/00 ,  C08K5/10 ,  C08K5/15 ,  C08L23/16

CPC分类号： C08K5/098 ,  C08K3/34 ,  C08K5/1575 ,  H01L2924/01078

摘要： The propylene-ethylene block copolymer composition of the invention is excellent in transparency as well as in stiffness and low temperature impact strength.The copolymer composition of the present invention comprises (a) from 0.01 to 1.0 part by weight of a nucleating agent and (b) from 0.01 to 3.0 parts by weight of talc having an average particle size of not more than 10 microns, admixed in 100 parts by weight of propylene-ethylene block copolymer. Said propylene-ethylene block copolymer was formed in a multi-stage polymerization process wherein the ethylene content of the copolymer formed at the propylene-ethylene copolymerization stage is from 5 to 40% by weight based on the total polymerization amount of the copolymer formed at said propylene-ethylene copolymerization stage.

摘要翻译： 本发明的丙烯 - 乙烯嵌段共聚物组合物的透明性以及硬度和低温冲击强度都优异。 本发明的共聚物组合物包含（a）0.01至1.0重量份的成核剂和（b）0.01至3.0重量份的平均粒径不大于10微米的滑石，其混合在100 重量份的丙烯 - 乙烯嵌段共聚物。 所述丙烯 - 乙烯嵌段共聚物是在多阶段聚合方法中形成的，其中在丙烯 - 乙烯共聚阶段形成的共聚物的乙烯含量为5-40％（重量），基于在所述 丙烯 - 乙烯共聚阶段。