Polymerization catalysts, their production and use
US6518215B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2000 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | May 17, 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 catalyst, particularly a metallocene catalyst and catalyst system useful in the polymerization of olefins into a polymer product. The polymer product has a broad molecular weight distribution, a high molecular weight and a narrow composition distribution and is easily processable. The catalyst of the invention may comprise:a) a first component comprising at least one transition metal of Group IV, V or VI and bonded to 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; wherein 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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.