Bridged metallocene compound, olefin polymerization catalyst containing the same, and ethylene polymer obtained with the catalyst
US8785574B2 · kind B2 · utility
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13References
12Claims
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Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Dec 20, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
According to the invention, a single or plural kinds of bridged metallocene compounds having differing cyclopentadienyl-derived groups afford macromonomers that are a source of long-chain branches and simultaneously catalyze the repolymerization of the macromonomers into olefin polymers having a large number of long-chain branches, small neck-in in the T-die extrusion, small take-up surge and superior mechanical strength. The olefin polymerization catalysts and the polymerization processes can efficiently produce the olefin polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.