Catalyst having a ketimide ligand
US6114481A · kind A · utility
36Cited by
7References
6Claims
0Family size
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Key dates
| Filing date | Aug 26, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Aug 26, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst system comprises an organometallic complex of a group 4 metal having a ketimide ligand. The organometallic complex preferably also contains a cyclic ligand which forms a delocalized pi-bond with the metal (such as a cyclopentadienyl-type ligand). Preferred organometallic complexes may be activated with a so-called "substantially non coordinating anion" to form a low cost cocatalyst system which is excellent for the preparation of olefin copolymers having both high molecular weight and very low density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.