公开(公告)号：US20010021732A1

公开(公告)日：2001-09-13

申请号：US09764384

申请日：2001-01-19

申请人： Chisso Corporation

发明人： Minoru Terano ,  Takahiro Oka ,  Nobutoshi Komori ,  Tetsuya Matsukawa

IPC分类号： C08L001/00 ,  C08L053/00 ,  C08L023/04

CPC分类号： C08L23/10 ,  C08L53/00 ,  C08L2666/24

摘要： A propylene-ethylene block copolymer composition is disclosed which comprises 0.01 to 10% by weight of an A-B type propylene-ethylene block copolymer (C) consisting essentially of a polypropylene segment (A) and an ethylene-propylene random copolymer segment (B), and 99.99 to 90% by weight of a propylene polymer (D), wherein the A-B type propylene-ethylene block copolymer (C) comprises 5 to 80% by weight of the ethylene-propylene random copolymer segment (B) having an ethylene content of 10 to 90% by weight and the propylene polymer (D) comprises 60 to 95% by weight of a homopolymer of propylene or a copolymer of propylene containing a copolymerizable monomer therewith (D1) and 40 to 5% by weight of an ethylene-propylene random copolymer (D2).