Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom
US6869904B2 · kind B2 · utility
48Cited by
31References
22Claims
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Key dates
| Filing date | Apr 23, 2003 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Apr 28, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F212/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New ligands, compositions, metal-ligand complexes and arrays with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.