Catalytic complexes and their use for polymerizing alpha-olefins
US6670434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2002 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | May 20, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A complex of a transition metal complying with the general formula (I) in whichM is a transition metal of groups 6 to 12,T is the oxidation state of M,each A, which may be identical with or differ from each other, is an atom or an atomic grouping bonded covalently or ionically to the transition metal M,b is the valency of A,each R1, R2, R3, R4 and R5 is independently a hydrogen atom, an unsubstituted or substituted hydrocarbon group, an unsubstituted or substituted heterohydrocarbon group, or an inert functional group,R6 and R7 are, independently of one another, a polynuclear aromatic hydrocarbon group containing at least two condensed benzene nuclei, substituted with at least one hydrocarbon group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.