Self limiting catalyst composition and propylene polymerization process
US7491670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2004 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Sep 17, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J31/143
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more aluminum containing cocatalysts; a selectivity control agent (SCA) comprising at least one silicon containing compound containing at least one C1-10 alkoxy group bonded to a silicon atom, and one or more activity limiting agent (ALA) compounds comprising one or more aliphatic or cycloaliphatic carboxylic acids; alkyl-, cycloalkyl- or alkyl(poly)(oxyalkyl)-(poly)ester derivatives thereof; or inertly substituted derivatives of the foregoing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.