发明名称 |
POLYPROPYLENE BLOCK COPOLYMER, ITS USE, AND POLYPROPYLENE RESIN COMPOSITION COMPRISING SAID POLYPROPYLENE BLOCK COPOLYMER |
摘要 |
<p>Provided are a molding appearance modifier for resins capable of controlling appearance of large-sized molded parts only by small addition, and a polypropylene resin composition capable of providing good appearance to, for example, automobile exterior parts, and has excellent molding processability. The invention relates to a propylene block copolymer having a crystalline propylene polymer portion and a propylene·ethylene random copolymer portion, wherein the crystalline propylene polymer portion has an intrinsic viscosity [·] homo of 1.2 dl/g or less; the propylene·ethylene random copolymer portion has an ethylene content of 30 to 70 wt.%, has an intrinsic viscosity [·] copoly of 2.5 to 7.0 dl/g, and is added in an amount of 40 to 80 wt.% based on the whole propylene block copolymer; and the propylene block copolymer, in its entirety, has a melt flow rate of 0.1 to 10 g/10 min; and a [·] copoly / [·] homo ratio falls within a range of 2.5 to 10; and a polypropylene resin composition using the propylene block copolymer as a molding appearance modifier.</p> |
申请公布号 |
EP1837351(A1) |
申请公布日期 |
2007.09.26 |
申请号 |
EP20060702615 |
申请日期 |
2006.01.12 |
申请人 |
JAPAN POLYPROPYLENE CORPORATION |
发明人 |
SUZUKI, AKIHIRO;MIZUKAMI, SHIGEO;ZANKA, YUKIHITO |
分类号 |
C08F210/16;C08F297/08;C08L53/00 |
主分类号 |
C08F210/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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