Methods of polymerizing ethylene and styrene copolymers with substituted pyridyl amine catalysts and catalysts therefor

US6706829B2 · kind B2 · utility

Assignee

• Symyx Technologies, Inc. · US

Inventors

• Thomas R. Boussie · Menlo Park, US
• Gary M. Diamond · Menlo Park, US
• Christopher Goh · San Francisco, US
• Keith Hall · San Jose, US
• Anne M. LaPointe · Sunnyvale, US
• Margarete K. Leclerc · Santa Clara, US
• Cheryl Lund · Milpitas, US
• Vince Murphy · Cupertino, US

Key dates

• Filing date: Nov 6, 2001
• Grant date: Mar 16, 2004
• Expiry date: Dec 24, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C40B40/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

New ligands, compositions, metal-ligand complexes and arrays with pyridyl-amine ligands are disclosed that catalyze the polymerization of monomers into polymers. Certain of these catalysts with hafnium metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, isobutylene or styrene. Certain of the catalysts are particularly effective at polymerizing propylene to high molecular weight isotactic polypropylene in a solution process at a variety of polymerization conditions.