The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 2011
Filed:
Aug. 01, 2008
Lin Wang, Wilmington, DE (US);
Elisabeth M. Hauptman, Princeton, NJ (US);
Lynda Kaye Johnson, Wilmington, DE (US);
Elizabeth Forrester Mccord, Hockessin, DE (US);
Stephan J. Mclain, Wilmington, DE (US);
Ying Wang, West Chester, PA (US);
Lin Wang, Wilmington, DE (US);
Elisabeth M. Hauptman, Princeton, NJ (US);
Lynda Kaye Johnson, Wilmington, DE (US);
Elizabeth Forrester McCord, Hockessin, DE (US);
Stephan J. McLain, Wilmington, DE (US);
Ying Wang, West Chester, PA (US);
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Transition metal complexes of selected monoanionic phosphine ligands, which also contain a selected Group 15 or 16 (IUPAC) element and which are coordinated to a Group 3 to 11 (IUPAC) transition metal or a lanthanide metal, are polymerization catalysts for the (co)polymerization of olefins such as ethylene and α-olefins, and the copolymerization of such olefins with polar group-containing olefins. These and other nickel complexes of neutral and monoanionic bidentate ligands copolymerize ethylene and polar comonomers, especially acrylates, at relatively high ethylene pressures and surprisingly high temperatures, and give good incorporation of the polar comonomers and good polymer productivity. These copolymers are often unique structures, which are described.