Method for making finely divided perfluorocarbon copolymer
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United States of America Patent
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Sep 10, 1985
Grant Date -
N/A
app pub date -
Jan 13, 1983
filing date -
Jan 13, 1983
priority date (Note) -
Expired
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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.
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