Polyethylene materials prepared using mixed ziegler-natta catalyst systems
US7943545B2 · kind B2 · utility
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Key dates
| Filing date | Jul 8, 2010 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Jul 8, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/139
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyethylene may be prepared using a mixture of a silica supported catalyst and a magnesium chloride supported catalyst. By changing the ratio of the two catalysts, the polyethylene produced may have a varying bulk density and shear response. The method allows for the tuning or targeting of properties to fit a specific application, such as a blow molding or vapor barrier film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.