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.
|
申请公布号 |
US7309678(B2) |
申请公布日期 |
2007.12.18 |
申请号 |
US20050094681 |
申请日期 |
2005.03.29 |
申请人 |
FINA TECHNOLOGY, INC. |
发明人 |
RAUSCHER DAVID JOHN;GAUTHIER WILLIAM JOHN;HENRY SHADY NADER;HORTMANN KAI |
分类号 |
B01J31/16;C08F4/659;C08F4/6592;C08F10/00;C08F110/06 |
主分类号 |
B01J31/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|