发明名称 |
Polyorganosilsesquioxane supported metallocene catalysts |
摘要 |
Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers such as the polymerization of propylene to produce syndiotactic polypropylene or isotactic polypropylene. The supported catalyst comprises a stereospecific metallocene catalyst component and a co-catalyst component comprising an alkylalumoxane. Both the metallocene catalyst component and the co-catalyst component are supported on a particulate polyorganosilsesquioxane support comprising spheroidal particles of a polyorganosilsesquioxane having an average. diameter with the range of 0.3-20 microns. The polyorganosilsesquioxane support is characterized by relatively low surface area, specifically a surface area less than 100 square meters per gram. The metallocene component can take the form of a single metallocene or two or more metallocenes which are co-supported on the polyorganosilsesquioxane support.
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申请公布号 |
US7125937(B2) |
申请公布日期 |
2006.10.24 |
申请号 |
US20040765688 |
申请日期 |
2004.01.27 |
申请人 |
FINA TECHNOLOGY, INC. |
发明人 |
RAUSCHER DAVID JOHN;GAUTHIER WILLIAM JOHN |
分类号 |
C08F4/16;B01J31/34;B01J31/38;C08F4/52;C08F4/76 |
主分类号 |
C08F4/16 |
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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