发明名称 |
HIGH DENSITY ETHYLENE-PROPYLENE BLOCK COPOLYMER AND PROCESS FOR PRODUCING THE SAME |
摘要 |
A high-rigidity ethylene/propylene block copolymer composed of a crystalline polypropylene segment (I) and an ethylene/propylene random copolymer segment (II), wherein the segment (I) has a Q value (referring to a ratio of weightaverage molecular weight (Mw) to number-average molecular weight (Mn)) of 5 on below as determined by gel permeation chromatography (GPC), an isotactic pentad fraction of 0.98 or above as calculated according to 13C-NMR spectrometry, and an intrinsic viscosity of 0.6 to 0.88 dl/g as determined at 135 ~C in tetralin, and the segment (II) has an intrinsic viscosity of 4.0 to 6.0 dl/g as determined at 135 ~C in tetralin and an ethylene/propylene weight ratio of 25 : 75 to 35 : 65 and is contained in an amount of 8 to 22 wt.% based on the total amount of the segments (I) and (II); and a process for the production of the block copolymer.
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申请公布号 |
CA2251373(A1) |
申请公布日期 |
1997.10.16 |
申请号 |
CA19972251373 |
申请日期 |
1997.04.07 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED;TOYOTA JIDOSHA KABUSHIKI KAISHA;TOYOTA JIDOSHA KABUSHIKI KAISHA;SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
HISAYAMA, TETSUYA;NISHIO, TAKEYOSHI;MIYAKE, YUICHI;DOI, TERUHIKO;OHKAWA, KENICHI;HIRAKAWA, MANABU |
分类号 |
C08F4/658;C08F210/06;C08F297/08;(IPC1-7):C08F297/08 |
主分类号 |
C08F4/658 |
代理机构 |
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代理人 |
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地址 |
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