发明名称 |
Process for increasing molecular weight in polyolefins using Ziegler-Natta catalysts and lithium compounds |
摘要 |
This invention relates to a conventional supported heterogeneous Ziegler-Natta catalyst for the polymerization of olefins. It has been found that adding a lithium compound to a transition metal catalyst component and then adding an organoaluminum co-catalyst and an organosilicon electron donor produces a catalyst which yields polymer with increased molecular weight. The lithium compound is of the general formula LiCp wherein Cp is a cyclopentadienyl or substituted cyclopentadienyl and is preferably lithium cyclopentadienide or lithium indene. Preferably, the molar ratio of lithium compound/transition metal is at least 0.2.
|
申请公布号 |
US6531553(B1) |
申请公布日期 |
2003.03.11 |
申请号 |
US19950480728 |
申请日期 |
1995.06.07 |
申请人 |
FINA TECHNOLOGY, INC. |
发明人 |
SHAMSHOUM EDWAR SHOUKRI;BAUCH CHRISTOPHER |
分类号 |
B01J31/02;B01J31/12;B01J31/14;B01J31/22;B01J31/38;C08F4/64;C08F4/659;C08F10/00;C08F10/06;(IPC1-7):C08F4/609 |
主分类号 |
B01J31/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|