Polymer electrolyte membrane, and process for the production the

Details Polymer electrolyte membrane, and process for the production the Polymer electrolyte membrane, and process for the production the

1995-05-19

1996-10-01

Berman, Susan W.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528373, 528383, 528391, 522111, 522149, 522162, C08F28308, C08F29900, C08G 6940, C08G 6942

Patent

active

055612024

ABSTRACT:
In order to produce a polymer electrolyte membrane from sulfonated, aromatic polyether ketone, an aromatic polyether ketone of the formula (I) ##STR1## in which Ar is a phenylene ring having p- and/or m-bonds,
Ar' is a phenylene, naphthylene, biphenylene, anthrylene or another divalent aromatic unit,
X, N and M, independently of one another are 0 or 1,
Y is 0, 1, 2 or 3,
P is 1, 2, 3 or 4,
is sulfonated and the sulfonic acid is isolated. At least 5% of the sulfonic groups in the sulfonic acid are converted into sulfonyl chloride groups, and these are reacted with an amine containing at least one crosslinkable substituent or a further functional group, and unreacted sulfonyl chloride groups are subsequently hydrolyzed. The resultant aromatic sulfonamide is isolated and dissolved in an organic solvent, the solution is converted into a film, and the crosslinkable substituents in the film are then crosslinked.
In specific cases, the crosslinkable substituents can be omitted. In this case, sulfonated polyether ketone is converted into a film from solution.

REFERENCES:
patent: 4755540 (1988-07-01), Blakey
patent: 5028337 (1991-07-01), Linder et al.
patent: 5112892 (1992-05-01), Cardew et al.
patent: 5254223 (1993-10-01), Josowicz et al.
German Abstract DE 3402-471-A, Jan. 25, 1984.
German Abstract DE 3321-860-A, Jun. 16, 1983.

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