Transition metal olefin polymerization catalysts
US5504049A · kind A · utility
97Cited by
12References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1993 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Jul 1, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to non-Group 4 transition metal compositions useful as olefin polymerization catalysts, wherein the transition metal is in a high oxidation state. The invention further relates to design of new ligand systems and methods of preparing and using the same. Compositions useful as catalyst precursors are neutral transition metal complexes comprising the unique ligand systems of the invention. The inventive compositions may be activated to a catalytic state by ion-exchange reagents or by Lewis acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.