Process for producing fluorinated copolymer having ion-exchange

Details Process for producing fluorinated copolymer having ion-exchange Process for producing fluorinated copolymer having ion-exchange

1977-09-27

1979-02-06

Schafer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

526247, 526 18, C08F21418, C08F 218

Patent

active

041383737

ABSTRACT:
A fluorinated copolymer having 1 to 50 mole % of a component having functional group of carboxylic acid group or a group which can be converted to carboxylic acid group, is produced by copolymerizing a fluorinated ethylenic unsaturated monomer and a functional monomer having the functional group in the presence of a polymerization initiator source in an aqueous medium under the pressure of higher than 7 kg/cm.sup.2 whereby the copolymer having high molecular weight (T.sub.Q of higher than 150.degree. C.) and an ion exchange capacity of 0.5 to 4 meq/g dry polymer is produced.

REFERENCES:
patent: 3654245 (1972-04-01), Kometani et al.

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