Method for making finely divided perfluorocarbon copolymer

Details Method for making finely divided perfluorocarbon copolymer Method for making finely divided perfluorocarbon copolymer

1983-01-13

1985-09-10

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

524544, 528492, 528493, 528494, 528495, 528496, 428402, C08D 520, C08F 600

Patent

active

045407169

ABSTRACT:
A method for making a quite finely divided particulate copolymeric perfluorocarbon having pendant cation exchange functional groups, and having an equivalent weight of at least in excess of 900 but not greater than about 1500. In the method, the perfluorocarbon copolymer is solvated in a solvent and then precipitated from solution by addition of a substance miscible in the solvent but having essentially no capability for solvating the perfluorocarbon copolymer. The method is conducted at a temperature generally below about 300.degree. C.

REFERENCES:
patent: 2732357 (1956-01-01), Sprung
patent: 2876206 (1959-03-01), Green
patent: 3615024 (1971-10-01), Michaels
patent: 4110529 (1978-08-01), Stoy
patent: 4341685 (1982-07-01), Miyake et al.
patent: 4414280 (1983-11-01), Silva et al.

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