Process for fusion bonding of fluorocarbon type polymers

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

B - Operations, Transporting

32

B

154/71

B32B 27/00 (2006.01) C08J 5/22 (2006.01)

Patent

CA 1145236

Abstract IMPROVED PROCESS FOR FUSION BONDING OF FLUOROCARBON TYPE POLYMERS 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 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 chloro-alkali electrolytic cells to advantageously elongate the life of the membranes.

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