Sterically shielded diboron-containing metallocene olefin polymerization catalysts
US5447895A · kind A · utility
64Cited by
2References
12Claims
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Key dates
| Filing date | Mar 10, 1994 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Mar 10, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/61908
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A non-coordinating anion, preferably containing a sterically shielded diboron hydride, if combined with a cyclopenta-dienyl-substituted metallocene cation component, such as a zirconocene metallocene, is a useful olefin polymerization catalyst component. The anion preferably has the formula ##STR1## where R is branched lower alkyl, such as t-butyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.