公开(公告)号：US5686533A

公开(公告)日：1997-11-11

申请号：US733017

申请日：1996-10-16

申请人： Markus Gahleitner ,  Klaus Bernreitner ,  Norbert Hafner ,  Kurt Hammerschmid ,  Hermann Heinemann

发明人： Markus Gahleitner ,  Klaus Bernreitner ,  Norbert Hafner ,  Kurt Hammerschmid ,  Hermann Heinemann

IPC分类号： B29C45/00 ,  B29C47/00 ,  B29K23/00 ,  C08L23/00 ,  C08L23/10 ,  C08L23/04

CPC分类号： C08L23/10 ,  C08L2205/02

摘要： Polypropylenes having a reduced tendency to white fracture, which contain A) from 70 to 95% by weight of a highly isotactic polypropylene having anisotactic index of more than 90 and a melt flow index between 0.1 and 100 g/10 min, it being possible for the polypropylene to be a homopolymer of propylene or a copolymer of propylene with one or more .alpha.-olefins, having a propylene content of at least 50 mol %, and B) from 5 to 30% by weight of a highly amorphous polypropylene having a crystalline polypropylene fraction of up to 10% by weight with an enthalpy of fusion of not more than 40 J/g and a melt flow index between 0.1 and 100 g/10 min, it being possible for the polypropylene to be a homopolymer of propylene or a copolymer of propylene with one or more .alpha.-olefins, having a propylene content of at least 80 mol %.

摘要翻译： 具有降低的白色断裂倾向的聚丙烯，其含有A）70至95重量％的具有大于90的各向异性指数和0.1至100g / 10分钟的熔体流动指数的高度全同立构聚丙烯， 丙烯的均聚物或丙烯与一种或多种丙烯含量至少为50摩尔％的α-烯烃的共聚物的聚丙烯，和B）5-30重量％的具有结晶的高度无定形的聚丙烯 聚丙烯分数高达10重量％，熔融焓不超过40J / g，熔体流动指数为0.1-100g / 10min，聚丙烯可以是丙烯均聚物或 丙烯与一种或多种α-烯烃的共聚物，丙烯含量为至少80摩尔％。