发明名称 |
HIGH MELT FLOW PROPYLENE POLYMER PRODUCED BY GAS-PHASE POLYMERIZATION |
摘要 |
A process to produce high melt flow propylene polymer comprises polymerizing propylene in the presence of a titanium-containing, magnesium-containing, high activity catalyst and an aluminum alkyl cocatalyst in a gas phase system which uses condensed liquid to control temperature wherein the external catalyst modifier is a tetraalkylorthosilicate, preferably tetraethylorthosilicate, at process conditions of temperature, hydrogen concentration, and Si/Mg, Al/Mg and Al/Si atomic ratios, to produce a high melt flow propylene polymer at high yield.
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申请公布号 |
CA2276689(A1) |
申请公布日期 |
1998.07.16 |
申请号 |
CA19982276689 |
申请日期 |
1998.01.08 |
申请人 |
BP AMOCO CORPORATION |
发明人 |
MCGINN, DENNIS LEE;LIN, CHI-HUNG;STREEKY, JEROME A.;WILSON, H. DALE;PHALAKORNUL, KANOKROT JA |
分类号 |
C08F2/38;C08F4/646;C08F10/06;C08F110/06;(IPC1-7):C08F10/06 |
主分类号 |
C08F2/38 |
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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