Controlling resin properties in a gas phase polymerization process
US9062138B2 · kind B2 · utility
1Cited by
38References
19Claims
0Family size
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Key dates
| Filing date | Nov 8, 2013 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Nov 8, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Methods for dramatically altering the processability of ethylene copolymers made with a supported phosphinimine polymerization catalyst. The method involves changing the polymerization reactor temperature during the polymerization of ethylene and a least one alpha-olefin when a phosphinimine catalyst which comprises a substituted or unsubstituted indenyl ligand and a phosphinimine type ligand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.