Polymerization catalysts, their production and use
US6608000B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Jun 3, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention generally relates to a metallocene-based, olefin polymerization catalyst system. The easily processible polymer product has a broad molecular weight distribution, a high molecular weight, and a narrow composition distribution. The catalyst system comprises a first component with a Group-4-6 metal bonded to cyclopentadienyl-containing rings having at least two substituents bonded to the rings in the same position; a second component comprising a Group-4-6 metal bonded to cyclopentadienyl-containing rings having at least two substituents bonded to the rings; and a third component comprising a Group-4-6 metal bonded to cyclopentadienyl-containing rings where one of the rings is substituted identically to the first component and another is substituted identically to the second component. When the substituents of the first and second components are the same, they are bonded to the first component rings at positions different from the bonding positions of the second component rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.