Heat sealing untreated sulfonamide-type cation exchange membrane

Details Heat sealing untreated sulfonamide-type cation exchange membrane Heat sealing untreated sulfonamide-type cation exchange membrane

1979-04-30

1981-08-18

Gallagher, John J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1563082, 156333, 204296, 210506, 2105002, 428421, 428422, 521 27, C09J 500

Patent

active

042844606

ABSTRACT:
A method of heat sealing together two untreated layers of a sulfonated perfluorovinyl ether ion exchange diaphragm or membrane material having pendant groups predominantly in the sulfonamide form by placing a layer of untreated sulfonated perfluorovinyl ether material having pendant groups predominantly in the sulfonic acid form between the sulfonamide layers to create a "sandwich". The preferred heat sealing involves applying from 1 to 5, and preferably from 3.5 to 5.0 kg/cm.sup.2 pressure at from 260.degree. to 350.degree. C. and preferably from 280.degree. to 320.degree. C. for from 3.5 to 7.5, and preferably from 3.5 to 5.0 seconds to this "sandwich". It had been previously taught that such untreated sulfonamide layers could not be heat sealed together. The novel heat sealing technique of this invention enables fabrication of a cathode-membrane unit using ion exchange membranes having such a sulfonamide layer facing the cathode of an electrolytic cell.

REFERENCES:
patent: 3743562 (1973-07-01), Phipps
patent: 4072793 (1978-02-01), Watanabe et al.
patent: 4126589 (1978-11-01), Hamada et al.
patent: 4151053 (1979-04-01), Seko et al.
patent: 4165248 (1979-08-01), Darlington et al.
patent: 4172931 (1979-10-01), Leutner

Affiliated with

Also associated with

Rating

Heat sealing untreated sulfonamide-type cation exchange membrane does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heat sealing untreated sulfonamide-type cation exchange membrane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat sealing untreated sulfonamide-type cation exchange membrane will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-36321