Substituted pyridyl amine catalysts and processes for polymerizing crystalline polymers
US7087690B2 · kind B2 · utility
18Cited by
23References
19Claims
0Family size
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Key dates
| Filing date | Nov 25, 2003 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Nov 25, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC40B40/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New ligands, compositions, metal-ligand complexes and arrays with pyridyl-amine ligands are disclosed that catalyze the polymerization of monomers into polymers. Certain of these catalysts with hafnium metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, isobutylene or styrene. Certain of the catalysts are particularly effective at polymerizing propylene to high molecular weight isotactic polypropylene in a solution process at a variety of polymerization conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.