Method of preparing a polymeric electrolyte particularly for an

Details Method of preparing a polymeric electrolyte particularly for an Method of preparing a polymeric electrolyte particularly for an

1980-04-02

1981-10-20

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

526287, C08K 300

Patent

active

042960169

ABSTRACT:
In preparing an electrolyte comprising a mixture of poly[2-acrylamido-2-methyl-propanesulfphonic acid] and water in which a pigment is distributed substantially homogeneously, monomer of the formula CH.sub.2 .dbd.CH--CO--NH--C(CH.sub.3).sub.2 --CH.sub.2 --SO.sub.3 H is first dissolved in water with a pigment suspended in it. A polymerization initiator, such as 2,2'-azo-bisisobutyronitrile, is added to the mixture and the polymerization reaction is carried out with agitation, at a temperature in the range from room temperature to 60.degree. C. Finally, part of the water is evaporated from the viscous mass obtained, to give the desired mix. The pigmented electrolyte may be used in electro-optical devices such as electrochromic display cells.

REFERENCES:
patent: 2983712 (1961-05-01), Wilkinson
patent: 3402222 (1968-09-01), Zutty
patent: 3692673 (1972-09-01), Hoke
patent: 3931089 (1976-01-01), Karl

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