Catalysts used for olefine polymerization and the preparation thereof

US6800774B2 · kind B2 · utility

Assignee

• Changchun Institute of Applied Chemistry Chinese Academy of Sciences · CN

Inventors

• Yuesheng Li · Charlottesville, US
• Jingyu Liu · Changchun, CN
• Ke Dai · Beijing, CN
• Yi Zheng · Beijing, CN

Key dates

• Filing date: May 10, 2001
• Grant date: Oct 5, 2004
• Expiry date: Jul 5, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2410/03
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides a polynuclear &agr;-diimine Ni(II) complex used as the precursor of the catalyst in polymerizing polyolefine, represented by the following formula: wherein M is Ni; X is Cl or Br; m and n is independently an integer from 0 to 100, respectively; R1 and R2 is the same or different, and is selected from the group consisting of H, methyl, ethyl, isopropyl and tert-butyl; Y is CR3R4, wherein R3 and R4 is the same or different, and is selected from the group consisting of H, methyl, ethyl, propyl, butyl and phenyl, or R3 and R4 forming a cyclic alkyl group; R5 and R6 is the same or different, and is selected from the group consisting of methyl, ethyl, propyl and heterocyclic group; Q is a cyclic divalent residual group of the following formula or a mixture thereof: The compound of this invention can be used to catalyze the polymerization of ethylene and to prepare high molecular weight branched polyethylene.