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:
Feb. 24, 1981
Filed:
Dec. 26, 1978
Applicant:
Inventor:
Lawrence R Brecker, Brooklyn, NY (US);
Assignee:
Argus Chemical Corporation, Brooklyn, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 526217 ; 526344 ; 5263442 ; 526345 ; 528492 ;
Abstract
The resistance of polyvinyl chloride resins to the development of yellow to orange reversible discoloration when heated in the presence of water at moderately elevated temperatures above 80.degree. C. up to about 160.degree. C. is improved by combining therewith an N,N'-diphenyl urea. Such reversible discoloration is not associated with any heat instability, and the resistance of the polyvinyl chloride resin to deterioration when heated at processing temperatures of 150.degree. C. and above is then improved by incorporation of the usual polyvinyl chloride resin heat stabilizers.