Heterocyclic metallocenes and polymerization catalysts
US7238818B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2003 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Oct 28, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/05
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YjR″iZjjMeQkPl wherein Y is a coordinating group containing a six π electron central radical directly coordinating Me, to which are associated one or more radicals containing at least one non-carbon atom selected from B, N, O, Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb and Te; R″ is a divalent bridge between the Y and Z groups; Z is a coordinating group, optionally being equal to Y; Me is a transition metal; Q is halogen or hydrocarbon substituents; P is a counterion; i is 0 or 1; j is 1–3; jj is 0–2; k is 1–3; and l is 0–2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.