Polymerization catalysts, their production and use
US6384158B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Sep 13, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The catalyst system of the invention comprises:I) a catalyst for polymerizing olefins comprising:a) a first component comprising at least one transition metal of Group IV, V or VI and at least two cyclopentadienyl containing rings, said rings each having at least two substituents bonded to each of said rings in the same position;b) a second component comprising said transition metal and said cyclopentadienyl containing rings, said rings each having at least two substituents bonded to each of said rings in the same or different position than said substituents of said first component; said substituents of the said first and second components can be the same or different, with the provision that when the substituents of said first and second components are the same, said substituents of said components are bonded to said rings in different positions; andc) a third component comprising said transition metal bonded to said cyclopentadienyl containing rings where one of said rings is substituted identically as said first component and another of said rings is substituted identically as said second component; andII) a cocatalyst or activator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.