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:
Mar. 23, 2010
Filed:
Oct. 17, 2002
Lin Wang, Hockessin, DE (US);
Lynda K. Johnson, Wilmington, DE (US);
Alex S. Ionkin, Kennett Square, PA (US);
Lin Wang, Hockessin, DE (US);
Lynda K. Johnson, Wilmington, DE (US);
Alex S. Ionkin, Kennett Square, PA (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Olefins are polymerized by novel transition metal complexes of selected iminocarboxylate and iminoamido ligands, sometimes in the presence of cocatalysts such as alkylaluminum compounds or neutral Lewis acids. Olefins which may be (co)polymerized include ethylene, α-olefins, and olefins containing polar groups such as olefinic esters for example acrylate esters. Also described are certain 'Zwitterionic' transition metal complexes as polymerization catalysts for making polar copolymers. The resulting polymers are useful as thermoplastics and elastomers.