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:
Jul. 20, 1993
Filed:
Nov. 24, 1992
Applicant:
Inventor:
Lawrence C Muschiatti, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08J / ;
U.S. Cl.
CPC ...
521182 ; 521 51 ; 521 79 ; 521 97 ;
Abstract
The present invention relates to poly(ethylene terephthalate)('PET') polymer resins having high melt strength and advantageous non-Newtonian behavior; the resins can be foamed to produce closed cell structures with advantageous densities, cell sizes, cell size distributions, mechanical properties and thermal properties. More specifically, the PET resins of the present invention are highly branched due to the inclusion of one or more branching agents, and these resins can be advantageously used with environmentally friendly blowing agents.