Fluorinated cation exchange membrane and process for preparing t

Details Fluorinated cation exchange membrane and process for preparing t Fluorinated cation exchange membrane and process for preparing t

1982-01-29

1983-05-03

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

B01J 4712

Patent

active

043821235

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: 4294943 (1981-10-01), Onoue et al.
patent: 4340680 (1982-07-01), Asawa et al.

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