Ethylene/α-olefin copolymer made with a non-single-site/single-site catalyst combination, its preparation and use

US7101939B2 · kind B2 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Thomas E. Nowlin · Somerville, US
• Pradeep P. Shirodkar · Houston, US
• Robert I. Mink · Yonkers, US
• Gary M. Diamond · Menlo Park, US
• Jill H. Paul · Edgewater, US
• Lawrence T. Kale · Cochrane, US
• Keith Dackson · East Aurora, US

Key dates

• Filing date: Oct 11, 2002
• Grant date: Sep 5, 2006
• Expiry date: Nov 7, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31855
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An ethylene/α-olefin copolymer comprising a component produced by a non-single-site polymerization catalyst and a component produced by a single-site polymerization catalyst, its preparation and use are described. The copolymer has an α-olefin content of 5 to 20 percent by weight and shows at least two CRYSTAF peak temperatures differing by at least 15° C. and/or at least two DSC melting peak temperatures differing by at least 15° C.