Solutions of sulfonyl fluoride compounds and fluoropolymers
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United States of America Patent
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Sep 7, 1982
Issued Date -
N/A
app pub date -
Aug 8, 1980
filing date -
Sep 26, 1979
priority date (Note) -
Expired
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Abstract
Solutions are disclosed with solvents having completely halogenated, saturated, hydrocarbon backbones and solubility parameters within a particular range. Preferred solvent have at least one ether linkage. An exemplary solvent is ##STR1## wherein X is F, Cl, Br, and I; n is 0, 1, and 2; m is 1, 2, and 3; and Y is COOCH.sub.3 and SO.sub.2 F. The solutions include perfluorinated copolymers having high equivalent weight which have been prepared from tetrafluoroethylene and perfluorinated sulfonyl fluoride- or carboxyl-containing vinyl monomers.
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