Catalyst compositions for the polymerization of olefins
US6844404B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | May 20, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention includes novel ligands which may be utilized as part of a catalyst system. A catalyst system of the present invention is a transition metal-ligand complex. In particular, the catalyst system includes a transition metal component and a ligand component comprising a Nitrogen atom and/or functional groups comprising a Nitrogen atom, generally in the form of an imine functional group. In certain embodiments, the ligand component may further comprise a phosphorous atom. Preferred ligand components are bidentate (bind to the transition metal at two or more sites) and include a nitrogen-transition metal bond. The transition metal-ligand complex is generally cationic and associated with a weakly coordinating anion. A catalyst system of the present invention may further comprise a Lewis or Bronsted acid. The Lewis or Bronsted acid may be complexed with the ligand component of the transition metal-ligand complex.,
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.