Processes for transitioning between metallocene and Ziegler-Natta polymerization catalysts
US6949612B2 · kind B2 · utility
9Cited by
14References
14Claims
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Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Feb 1, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.