Oxygen-bridged bimetallic complex, the production thereof and its utilization for polymerization catalysis

US7645716B2 · kind B2 · utility

Assignee

• GEORG-AUGUST-UNIVERSITÄT GÖTTINGEN · DE

Inventors

• Herbert Roesky · Göttingen, DE
• Guangcai Bai · Windsor, CA
• Vojtech Janicik · Göttingen, DE
• Sanjay Singh · Fremont, US

Key dates

• Filing date: Mar 15, 2005
• Grant date: Jan 12, 2010
• Expiry date: Jun 23, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The novel binuclear, oxygen-bridged, bimetallic complexes of the general formula (I):[(LM1R1)(Cp2M2R2)](μ-O)  (I)are suitable as polymerization catalysts for olefin polymerization. (M1=Al, Ge, Zr or Ti; M2=Zr, Ti or Hf; Cp=cyclopentadienyl; R1, R2=methyl, ethyl, i-propyl, t-butyl, halogen, phenyl, alkylphenyl, SiMe3; L=a bidentate, doubly heteroatom-coordinated organic chemical ligand, which together with the metal M1 forms a 5 or 6-membered ring.) They display very good catalytic activities, good operating lives, and require little cocatalyst.