Substituted pyridyl amine complexes, and catalysts

US6900321B2 · 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: May 31, 2005
• Expiry date: Dec 6, 2022

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 pyridylamine 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.