Method for altering melt flow ratio of ethylene polymers
US10836851B2 · kind B2 · utility
4Cited by
33References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 30, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Feb 16, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2410/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for altering the melt flow ratio (MFR) of ethylene copolymers made in a gas phase reactor using a supported Ziegler-Natta catalyst treated with a catalyst modifier. The method involves changing the amount of the catalyst modifier added to the supported Ziegler-Natta polymerization catalyst to effect changes in the MFR of the resulting polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.