发明名称 |
Crystalline propylene block-copolymer composition for use in automobile parts |
摘要 |
A crystalline propylene block-copolymer composition exhibiting superior flowability upon molding for use in automobile parts, which composition comprises 41 to 71% by weight of a crystalline propylene block-copolymer composed of a propylene homopolymer portion (Fp) and an ethylene/propylene random copolymer portion (Fc) and having an ethylene content of 1 to 10% by weight and a melt flow rate (MFR) of 20 to 100 g/10 min.; 12 to 22% by weight of a first hydrogenated product of a block-copolymer having a lower styrene content; 2 to 12% by weight of a second hydrogenated product of a block-copolymer having a higher styrene content; and 15 to 25% by weight of talc, wherein the propylene homopolymer portion (Fp) contains 20 to 50% by weight of a low molecular weight propylene homopolymer having an MFR of 400 to 1,000 g/10 min., the average MFR being 100 to 350 g/10 min. and the isotactic pentad fraction being at least 98%, and wherein the random copolymer portion (Fc) has an intrinsic viscosity of 7 dl/g or higher. |
申请公布号 |
AU1643799(A) |
申请公布日期 |
1999.09.02 |
申请号 |
AU19990016437 |
申请日期 |
1999.02.12 |
申请人 |
GRAND POLYMER CO., LTD.;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
IKUNORI SAKAI;HISAYUKI IWAI;OSAMU KITO;MASATOSHI MATSUDA;TAKAO NOMURA;TAKAYUKI NAGAI;MIKIO HASHIMOTO |
分类号 |
B29C45/00;B29K23/00;C08K3/34;C08L53/00;C08L53/02 |
主分类号 |
B29C45/00 |
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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