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. 16, 1993
Filed:
Aug. 10, 1990
Applicant:
Inventors:
Assignee:
Du Pont Canada Inc., Mississauga, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525371 ; 5253337 ; 525420 ;
Abstract
A process for increasing the molecular weight of a polymer, comprising subjecting said polymer to electromagnetic radiation in the presence of a paramagnetic metallic catalyst for a sufficient period of time to significantly increase the molecular weight of the polymer, said polymer being either in solution or in a molten state and said radiation having a frequency in the range of about 0.9 to 10 GHz. The preferred paramagnetic catalysts are metallic nickel, iron or cobalt. The preferred polymers are polyamides and polyolefins.