发明名称 |
Polyamide 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 polyamide support comprising spheroidical particles of a polyamide having an average diameter with the range of 5-60 microns, and a porosity permitting distribution of a portion of the co-catalyst within the pore volume of the polyamide particles while retaining a substantial portion on the surface of the particles. The polyamide support is characterized by relatively low surface area, specifically a surface area less than 20 square meters per gram. The metallocene component can take the form of a single metallocene or two or more co-supported metallocenes.
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申请公布号 |
US2005171307(A1) |
申请公布日期 |
2005.08.04 |
申请号 |
US20050094681 |
申请日期 |
2005.03.29 |
申请人 |
RAUSCHER DAVID J.;GAUTHIER WILLIAM J.;HENRY SHADY N.;HORTMANN KAI |
发明人 |
RAUSCHER DAVID J.;GAUTHIER WILLIAM J.;HENRY SHADY N.;HORTMANN KAI |
分类号 |
C08F4/659;C08F4/6592;C08F10/00;C08F110/06;(IPC1-7):C08F4/44 |
主分类号 |
C08F4/659 |
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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