发明名称 |
Process for producing stereoregular polymers having a narrow molecular weight distribution. |
摘要 |
<p>Stereoregular polymers having a molecular weight distribution of less than 5.0 and an isotactic index in excess of 96 percent are produced by polymerizing an alpha-olefin having 3 to 8 carbon atoms in a low pressure gas phase fluid bed process at a temperature in excess of 80 DEG C employing a heat stable catalyst system comprising (a) a solid catalyst component containing magnesium, titanium, halide and a polycarboxylic acid ester containing two coplanar ester groups attached to adjacent carbon atoms, as inside electron donor, (b) an organoaluminum cocatalyst, and (c) a silicon compound containing a silicon-oxygen-carbon linkage, as outside electron donor.</p> |
申请公布号 |
EP0291958(A2) |
申请公布日期 |
1988.11.23 |
申请号 |
EP19880107969 |
申请日期 |
1988.05.18 |
申请人 |
UNION CARBIDE CORPORATION |
发明人 |
BRADY III, ROBERT CONVERSE;STAKEM, FRANCIS GREGORY;LIU, HAN TAI;NOSHAY, ALLEN |
分类号 |
C08F4/649;C08F2/34;C08F4/60;C08F4/64;C08F4/654;C08F10/00;C08F10/06 |
主分类号 |
C08F4/649 |
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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