Process for fusion bonding of fluorocarbon type polymers which c

Details Process for fusion bonding of fluorocarbon type polymers which c Process for fusion bonding of fluorocarbon type polymers which c

1981-04-29

1982-07-13

Hamrock, William F.

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

Synthetic resins

Ion-exchange polymer or process of preparing

156 731, 521 30, B32B 3116, B01J 4712

Patent

active

043395490

ABSTRACT:
A fluorinated polymer having pendant cation exchange groups selected from sulfonic acid, carboxylic acid or sulfonamide groups, or their salts, is modified with a sulfonium compound and/or a phosphonium compound for substitution of the counter-ions of the cation exchange groups with sulfonium ions and/or phosphonium ions. The polymers treated in this manner are improved in their melt-flow characteristic to make fusion bonding between these polymers possible. The process is particularly suitable for repairing damaged cation exchange membranes for use in chlor-alkali electrolytic cells to advantageously elongate the life of the membranes.

REFERENCES:
patent: 3146213 (1964-08-01), Small
patent: 4218275 (1980-08-01), Kodija et al.
patent: 4284460 (1981-08-01), Moore et al.
patent: 4290833 (1981-09-01), Kodija et al.

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