Melt processing of fluorinated polymers

Details Melt processing of fluorinated polymers Melt processing of fluorinated polymers

1979-05-21

1981-01-20

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

204296, C25B 1300, C08D 520

Patent

active

042463530

ABSTRACT:
In performing melt processing of a fluorinated polymer which contains such pendant functional groups as sulfonic acid, carboxylic acid, sulfonamide and salts thereof, an aqueous medium is allowed to be present in the polymer to improve its melt-flow characteristic. Excellent heat sealing can be effected without degradation of the polymer. This method is particularly suitable for repairing the damaged ion-exchange membranes of fluorinated polymers used in the electrolysis of sodium chloride to enable elongation of their life to a great economical advantage.

REFERENCES:
patent: 3849243 (1974-11-01), Grot
patent: 3852135 (1974-12-01), Cook, Jr.
patent: 3884885 (1975-05-01), Grot
patent: 4076571 (1978-02-01), Specht et al.
patent: 4124477 (1978-11-01), Tokawa et al.

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