Transition metal catalytic systems and methods for preparing ethylene homopolymers or copolymers of ethylene and olefins using the same
US8742043B2 · kind B2 · utility
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Key dates
| Filing date | Oct 30, 2007 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Dec 16, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a group IV transition metal catalyst for producing an ethylene homopolymer or an ethylene-olefin copolymers, having high catalytic activity, which includes a cyclopentadiene derivative and one or more anionic ligands having an aryl group substituted with an aryl derivative at an ortho-position thereof around a transition metal, the ligands not being crosslinked to each other, a catalyst system including the group IV transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and a method of producing ethylene homopolymers or ethylene-olefin copolymers using the catalyst system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.