Olefin polymerization catalysts and processes for making and using same
US6506704B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1999 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Mar 23, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for forming neutral late transition metal chelates useful as polymerization catalysts comprising contacting a bidentate ligand forming compound that is free of electron-withdrawing groups with a di(tertiary amine) late transition metal reagent in the presence of an inert liquid, an olefinic monomer or a polar liquid selected from nitrites, ethers, aromatic heterocyclic amines, alcohols, nitroalkanes, nitroaromatics or mixtures thereof. The process provides a solid product or a solution of a storage stable transition metal bidentate ligand containing catalyst product which remains active for an extended storage period. Alternately, the present process can be conducted in situ in a polymerization zone of olefinic polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.