Ethylene-styrene copolymers and phenol-triazole type complexes, catalysts, and processes for polymerizing

US6794514B2 · kind B2 · utility

Assignee

• Symyx Technologies, Inc. · US

Inventors

• 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 12, 2002
• Grant date: Sep 21, 2004
• Expiry date: Jul 7, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/65912
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Metal-ligand complexes that are useful as precursors to catalysts for the polymerization of olefins are provided. Certain of the catalysts are particularly effective at polymerizing ethylene and styrene into copolymers having novel properties, including a low molecular weight and close comparison between vinyl and methyl end groups.