Preparation of propylene copolymer with dynamically operated reactor
US9079988B2 · kind B2 · utility
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20References
30Claims
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Assignee
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Key dates
| Filing date | Oct 6, 2009 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Nov 11, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2400/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of a propylene copolymer P1 having ethylene-derived comonomer units, which comprises the following steps: (i) introducing propylene, ethylene, and hydrogen into a polymerisation reactor R1, wherein the ethylene is fed to the polymerisation reactor R1 in a periodically varying amount, (ii) preparing the propylene copolymer in the polymerisation reactor R1 in the presence of a catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.