Cyclopentadienyl group 6b metal alpha-olefin polymerization catalysts and process for polymerizing alpha-olefins
US5593931A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Mar 3, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/6392
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a catalyst system for the homopolymerization of alpha-olefins having 2-8 carbon atoms, said catalyst system comprising a mixed-valent dimeric Group 6b metal compound catalyst precursor wherein one atom of said Group 6b metal is a cyclopentadienyl Group 6b metal hydrocarbyl complex in which the Group 6b metal has an oxidation state +3 and wherein one atom of said Group 6b metal is a cyclopentadienyl alkaryl complex in which the Group 6b metal has an oxidation state +1, said dimeric Group 6b metal compound being supported on an inorganic support. The catalyst system can contain, in addition, a Group 2 or Group 3 metal-alkyl compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.