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US 5,422,411 AGranted
Trifluorostyrene and substituted trifluorostyrene copolymeric compositions and ion-exchange membranes formed therefrom
AssigneeBallard Power Systems Inc.
InventorsJinzhu Wei, Charles Stone, Alfred E. Steck
Life of this patent
Estimating the term…
Abstract
Polymeric compositions are derived from copolymers of .alpha.,.beta.,.beta.-trifluorostyrene with a variety of substituted .alpha.,.beta.,.beta.-trifluorostyrenes. These compositions are suitable for use as membranes, particularly as ion-exchange membranes, and most particularly as solid polymer electrolytes in electrochemical applications, such as, for example, electrochemical fuel cells.
Claims8
A polymeric composition comprising:
- ##STR9## where m is an integer greater than zero and at least one of n, p and q is an integer greater than zero;
- A.sub.1, A.sub.2 and A.sub.3 are selected from the group consisting of alkyls, halogens, C.sub.y F.sub.2y+1 where y is an integer greater than zero, O-R (where R is selected from the group consisting of alkyls, perfluoroalkyls and aryls), CF.dbd.CF.sub.2, CN, NO.sub.2 and OH;
- and X is selected from the group consisting of SO.sub.3 H, PO.sub.3 H.sub.2, CH.sub.2 PO.sub.3 H.sub.2, COOH, OSO.sub.3 H, OPO.sub.3 H.sub.2, OArSO.sub.3 H where Ar is an aromatic, NR.sub.3.sup.+ (where R is selected from the group consisting of alkyls, perfluoroalkyls and aryls) and CH.sub.2 NR.sub.3.sup.+ (where R is selected from the group consisting of alkyls, perfluoroalkyls and aryls).
A polymeric composition consisting essentially of:
- ##STR10## where m is an integer greater than zero and at least one of n, p and q is an integer greater than zero;
- A.sub.1, A.sub.2 and A.sub.3 are selected from the group consisting of alkyls, halogens, C.sub.y F.sub.2y+1 where y is an integer greater than zero, O-R (where R is selected from the group consisting of alkyls, perfluoroalkyls and aryls), CF.dbd.CF.sub.2, CN, NO.sub.2 and OH;
- and X is selected from the group consisting of SO.sub.3 H, PO.sub.3 H.sub.2, CH.sub.2 PO.sub.3 H.sub.2, COOH, OSO.sub.3 H, OPO.sub.3 H.sub.2, OArSO.sub.3 H where Ar is an aromatic, NR.sub.3.sup.+ (where R is selected from the group consisting of alkyls, perfluoroalkyls and aryls) and CH.sub.2 NR.sub.3.sup.+ (where R is selected from the group consisting of alkyls, perfluoroalkyls and aryls).
A polymeric composition comprising:
- ##STR11## where at least one of n, p and q is an integer greater than zero;
- and A.sub.1, A.sub.2 and A.sub.3 are selected from the group consisting of O-R (where R is selected from the group consisting of C.sub.y H.sub.2y+1 and C.sub.y F.sub.2y+1, where y is an integer greater than three, and aryls), CF.dbd.CF.sub.2, CN, NO.sub.2 and OH.
A polymeric composition consisting essentially of:
- ##STR12## where at least one of n, p and q is an integer greater than zero;
- and A.sub.1, A.sub.2 and A.sub.3 are selected from the group consisting of O-R (where R is selected from the group consisting of C.sub.y H.sub.2y+1 and C.sub.y F.sub.2y+1, where y is an integer greater than three, and aryls), CF.dbd.CF.sub.2, CN, NO.sub.2 and OH.
Dependencies are inferred from the claim text.