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. 21, 1989
Filed:
Mar. 25, 1987
Applicant:
Inventor:
Gideon Levin, Rehovot, IL;
Assignee:
Yeda Research and Development Company Limited, Rehovot, IL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
427384 ; 4273935 ; 428518 ; 5253315 ; 525352 ;
Abstract
To plasticized polyvinyl chloride (PVC) there is applied a layer of PVC modified by the introduction of functional groups which can be crosslinked, preferably under the influence of heat. Such crosslinking provides a thin coating which prevents leakage of plasticizer and additives from the plasticized PVC substrate when it is contacted with solvents. Preferred modification of the PVC is by means of thiocarbamate moieties replacing some of the chlorine in the PVC from which the surface layer is produced.