Polymerization catalysts and process for producing bimodal polymers in a single reactor
US7312283B2 · kind B2 · utility
256Cited by
39References
75Claims
0Family size
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Key dates
| Filing date | Aug 22, 2005 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Aug 22, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such catalysts to produce polyolefins are also provided. The compositions and methods disclosed herein provide ethylene polymers having a HLMI of from about 0.5 to about 25, a polymer density of from about 0.920 to about 0.965, and a polydispersity of from about 3.0 to about 30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.