Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom

US6841502B2 · kind B2 · utility

Assignee

• Symyx Technologies, Inc. · US

Inventors

• Thomas R. Boussie · Menlo Park, US
• Oliver Brummer · Berlin, DE
• Gary M. Diamond · Menlo Park, US
• Christopher Goh · San Francisco, US
• Anne M. LaPointe · Sunnyvale, US
• Margarete K. Leclerc · Santa Clara, US
• James A. W. Shoemaker · Gilroy, US

Key dates

• Filing date: Apr 23, 2003
• Grant date: Jan 11, 2005
• Expiry date: Apr 23, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F212/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.