Fluorinated cation exchange membrane

Details Fluorinated cation exchange membrane Fluorinated cation exchange membrane

1980-05-23

1982-06-01

Edmundson, F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C25B 1308

Patent

active

043326650

ABSTRACT:
A fluorinated cation exchange membrane characterized by the gradual decrease in proportion of the density of carboxylic acid and/or carboxylate groups relative to the total density of carboxylic acid and/or carboxylate groups and sulfonic acid and/or sulfonate groups from one surface of the membrane to the other surface or an internal plane therewithin. The cation exchange membrane of the present invention can be prepared by treating one surface of a membrane comprising a fluorocarbon polymer containing pendant groups of the formula:

REFERENCES:
patent: 3969285 (1976-07-01), Grot
patent: 4065366 (1977-12-01), Oda et al.
patent: 4123336 (1978-10-01), Seko et al.
patent: 4151053 (1979-04-01), Seko et al.
patent: 4246090 (1981-01-01), de Nora et al.

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