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, 1978
Filed:
Mar. 11, 1976
Applicant:
Inventor:
Thomas A Rechlicz, Corpus Christi, TX (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260 / ; 260 / ;
Abstract
Disclosed is a method of sulfonating polymers having chlorotrifluoroethylene moieties. According to the disclosed method, a liquid composition containing the polymer, an excess of thiourea, and a solvent is maintained above about 100.degree. C. at a pressure sufficient to maintain the composition liquid. A polymer product having trifluoroethylene sulfonic acid and chlorotrifluoroethylene moieties is recovered. Also disclosed is a polymer having (CX.sub.1 X.sub.2 -CX.sub.3 X.sub.4), (CF.sub.2 -CFCl), and (CF.sub.2 -CF(SO.sub.3)) moieties where X.sub.1, X.sub.2, X.sub.3, and X.sub.4 may be hydrogen or fluorine.