发明名称 |
Propylene block copolymer, process for producing the same, and resin composition comprising the same |
摘要 |
A propylene block copolymer comprising: (a) a propylene homopolymer part having (i) an insoluble amount on xylene extraction at 25 DEG C. of 99.0% by weight or more; (ii) an isotactic pentad fraction of 98.0% or more; (iii) an isotactic average chain length of 500 or more; and (iv) a total amount of fractions having an isotactic average chain length of 800 or more obtained in a column chromatographic separation of 10% by weight or more, and (b) a copolymer part comprising propylene and at least one of ethylene and an alpha -olefin having from 4 to 12 carbon atoms, the proportion of the propylene homopolymer part (a) being from 50 to 97% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b), and the proportion of the copolymer part (b) being from 3 to 50% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b).
|
申请公布号 |
US5684099(A) |
申请公布日期 |
1997.11.04 |
申请号 |
US19950524627 |
申请日期 |
1995.09.07 |
申请人 |
SHOWA DENKO K.K. |
发明人 |
WATANABE, KAZUYUKI;YANAGIHARA, HISAYOSHI;SAKAGUCHI, RYUJI |
分类号 |
C08F4/06;C08F4/64;C08F297/08;(IPC1-7):C08F4/06 |
主分类号 |
C08F4/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|