Biaryl phenoxy group IV transition metal catalysts for olefin polymerization
US12221508B2 · kind B2 · utility
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Key dates
| Filing date | Dec 12, 2019 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Nov 8, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Catalyst systems for olefin polymerization include a metal-ligand complex of a general formula (I). The metal-ligand complex of formula (I) is a transition metal complex of titanium, zirconium, or hafnium, in which the transition metal is coordinated with a biaryl phenoxy ligand structure. Olefin polymerization processes include contacting ethylene and optionally one or more (C3-C12) alpha-olefins in the presence of the catalyst system to produce an ethylene-based polymer or copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.