Patent · US Expired

Transition metal compounds having a donor-acceptor interaction and a specific substitution pattern

US7169865B2 · kind B2 · utility

1Cited by

14References

17Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl-Heinz Aleksander Ostoja Starzewski · Sankt Goarshausen, DE
Norbert Steinhauser · Monheim, DE

Key dates

Filing date	Sep 22, 2003
Grant date	Jan 30, 2007
Priority date	—
Expiry date	Sep 22, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/943
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to compounds in which a transition metal is complexed by at least two ligand systems and at least two of the systems are reversibly joined to one another by at least one bridge comprising a donor and an acceptor, wherein at least one fluorenyl ligand is present and at least one substituent on the acceptor group is an alkyl or aryl radical. The invention further relates to the use of these compounds having a donor-acceptor interaction as polymerization catalysts for preparing high molecular weight elastomers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.