发明授权
- 专利标题： Polypropylene composition, process for preparing the same, and polymerization catalyst therefor
- 专利标题（中）： 聚丙烯组合物，其制备方法及其聚合催化剂
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申请号： US09214798申请日： 1999-01-11
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公开(公告)号： US06531551B2公开(公告)日： 2003-03-11
- 发明人: Katsuhiko Ohno , Masami Kimura , Taketo Hirose , Yoshitaka Morimoto , Jun Saito
- 申请人： Katsuhiko Ohno , Masami Kimura , Taketo Hirose , Yoshitaka Morimoto , Jun Saito
- 优先权： JP8-227582 19960809; JP8-322238 19961118
- 主分类号： C08F1006
- IPC分类号： C08F1006
摘要：
A polypropylene composition comprising 0.001 to 10 parts by weight of a polyethylene having an intrinsic viscosity [&eegr;E] of 0.01 to less than 15 dl/g s measured in tetralin at 135° C. and 100 parts by weight of a polyolefin comprising at least polypropylene, wherein the polyethylene is finely dispersed as particles with a number average particle diameter of, e.g., 1 to 5000 nm in the polyolefin comprising at least polypropylene. By virtue of the above constitution, the polypropylene composition has excellent transparency and rigidity, is free from the creation of a sweeper roll flow mark in the preparation of a film and substantially free from a neck-in phenomenon of a film, and has high productivity.
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