Polyolefins with new structures

US6495646B1 · kind B1 · utility

Assignees

• E.I. DU PONT DE NEMOURS AND COMPANY · US
• The University of North Carolina at Chapel Hill · US

Inventors

• Samuel David Arthur · Wilmington, US
• Maurice S. Brookhart · Chapel Hill, US
• Patricia Metzger Cotts · Wilmington, US
• Zhibin Guan · Irvine, US
• Lynda Kaye Johnson · Wilmington, US
• Christopher Moore Killian · Jonesborough, US
• Elizabeth Forrester McCord · Hockessin, US
• Stephan James McLain · Wilmington, US

Key dates

• Filing date: Feb 29, 2000
• Grant date: Dec 17, 2002
• Expiry date: Feb 29, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F20/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyolefins with unique highly branched structures, and which have unusually low Mark-Houwink constants are described. They are useful for instance as elastomers, viscosity index modifiers and lubricating oil bases.