Processes for transitioning between metallocene and Ziegler-Natta polymerization catalysts
US6995217B2 · kind B2 · utility
5Cited by
12References
6Claims
0Family size
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Key dates
| Filing date | Jul 28, 2005 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jul 28, 2025 |
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.