Bridged metallocenes, preparation, use in catalytic systems
US6433203B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jul 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Metallocene compounds having the general formula (I): R1 are hydrocarbon groups,R2 are hydrogen or hydrocarbon groups;M is a transition metal of group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table;M′ is a transition metal selected from those belonging to group 3 or to the lanthanide or actinide groups in the Periodic Table;X is a monoanionic ligand;p is an integer of from 0 to 3, being equal to the oxidation state of M minus two;q is an integer from 3 to 5; andn is an integer from 1 to 4, when the six-membered rings of formula (Ia) are not perhydrated, and is an integer of from 0 to 4, when the six-membered rings of formula (Ia) are perhydrated as well as in the compound of formula (Ib).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.