Process for preparing propylene polymers
US11702487B2 · kind B2 · utility
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13Claims
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Assignee
Inventors
Key dates
| Filing date | May 7, 2019 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | May 7, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing a propylene polymer, such as a propylene homopolymer, a propylene-ethylene random copolymer or a heterophasic propylene copolymer using a specific class of metallocene complexes in combination with a cocatalyst system comprising a boron containing cocatalyst and an aluminoxane cocatalyst, preferably in a multistage polymerization process including a gas phase polymerization step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.