发明名称 |
ETHYLENE-PROPYLENE BLOCK COPOLYMER ETHYLENE-PROPYLENE BLOCK COPOLYMER |
摘要 |
An ethylene-propylene block copolymer comprising a crystalline polypropylene moiety comprising a propylene homopolymer or a copolymer of propylene and not more than one mole% of ethylene or an .alpha.-olefin having 4 or more carbon atoms; and an ethylene-propylene random copolymer moiety having a composition consisting of ethylene and propylene in a weight ratio of ethylene to propylene of 20/80 to 60/40, wherein: (1) said crystalline polypropylene moiety has an intrinsic viscosity ¢n!p of 0.8 to 2.0 dl/g, a specific Q value as a ratio of weight average molecular weight Mw to number average molecular weight Mn of 3.0 to 5.0 as measured by the gel permeation chromatography, and a xylene soluble matter content at 20.degree.C of not more than 1.5% by weight; (2) said ethylene-propylene random copolymer moiety has an intrinsic viscosity ¢?!EP of 3.5 to 8.5 dl/g; and (3) said ethylene-propylene random copolymer moiety accounts for 5 to 20% by weight of the amount of the entire polymer.
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申请公布号 |
CA2079200(A1) |
申请公布日期 |
1993.03.28 |
申请号 |
CA19922079200 |
申请日期 |
1992.09.25 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
SADATOSHI, HAJIME;SAKAI, JIRO;WAKAMATSU, KAZUKI |
分类号 |
C08F297/08;C08L53/00;(IPC1-7):C08F297/00 |
主分类号 |
C08F297/08 |
代理机构 |
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地址 |
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