Bridged bis-fluorenyl metallocenes, process for the preparation thereof and use thereof in catalysts for the polymerization of olefins
US5786495A · kind A · utility
29Cited by
7References
6Claims
0Family size
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Key dates
| Filing date | Mar 1, 1996 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Mar 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Metallocene compounds of a Group 4 or 5 metal having two fluorenyl ligands bridged with a single silicon or germanium atom, said atom having two substituent groups containing a total of at least four carbon atoms, are useful as catalyst components for the polymerization of olefins. Particularly, it is possible to prepare high molecular weight atactic polypropylene with improved yields with respect to the known catalysts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.