Membranes and composites from fluoropolymer solutions

Details Membranes and composites from fluoropolymer solutions Membranes and composites from fluoropolymer solutions

1981-12-03

1983-11-08

Dawson, Robert A.

Stock material or miscellaneous articles

Composite

Of polyisocyanurate

204296, 2105002, 210506, 260543F, 260544F, 427245, 521 27, 524167, 524316, 524544, 560184, B32B 2724

Patent

active

044142803

ABSTRACT:
Solutions and membranes formed therefrom 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.

REFERENCES:
patent: 3170954 (1965-02-01), Rosenberg
patent: 3250808 (1966-05-01), Moore, Jr. et al.
patent: 3282875 (1966-11-01), Connolly et al.
patent: 3692569 (1972-09-01), Grot
patent: 3859330 (1975-01-01), Proskow
patent: 4038213 (1977-07-01), McClure et al.
patent: 4065366 (1977-12-01), Oda et al.
patent: 4188354 (1980-02-01), Munari et al.
patent: 4259226 (1981-03-01), Suhara et al.

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