Process for extraction of fluorinated copolymers with fluorocarb

Details Process for extraction of fluorinated copolymers with fluorocarb Process for extraction of fluorinated copolymers with fluorocarb

1980-12-10

1982-11-23

Hamrock, William F.

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

Synthetic resins

Ion-exchange polymer or process of preparing

203 43, 204296, B01J 3900, C08F 600

Patent

active

043606016

ABSTRACT:
A process for extracting a fluorinated polymer which contains carboxylic ester functional groups with a liquid compound which is preferably a perchlorofluorocarbon having a boiling point in the range of 30.degree. to 125.degree. C. is described. Polymer so extracted can be fabricated into a membrane and hydrolyzed to ion exchange form to provide a membrane for electrolytic cells. When used as the membrane for a chloralkali cell, such membrane provides improved performance, e.g., a high level of current efficiency and low power consumption are maintained for an extended period of time when compared against a membrane of like construction fabricated from polymer which has not been so extracted.

REFERENCES:
patent: 3221070 (1965-11-01), Okamura et al.
patent: 4131740 (1978-12-01), England
patent: 4243508 (1981-01-01), Donkese
Publications or Products (1975), p. 3.

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