Method of sulfonating fluorocarbon polymers and fluorocarbon pol

Details Method of sulfonating fluorocarbon polymers and fluorocarbon pol Method of sulfonating fluorocarbon polymers and fluorocarbon pol

1976-03-11

1978-02-21

Griffin, Ronald W.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 22R, C08G 7500

Patent

active

040751848

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.

REFERENCES:
patent: B493537 (1976-03-01), Kolb
patent: 2586363 (1952-02-01), McAlevy
patent: 3642728 (1972-02-01), Canter
patent: 3875096 (1975-04-01), Graefe et al.
patent: 3887530 (1975-06-01), O'Farrell et al.
patent: 3933732 (1976-01-01), Schmiegel
Journal of the American Chemical Society, vol. 58, 1936, pp. 1348-1352.

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