Protective membrane for electrochromic displays

Details Protective membrane for electrochromic displays Protective membrane for electrochromic displays

1979-09-21

1981-10-27

Davie, James W.

G02F 117

Patent

active

042970067

ABSTRACT:
The invention provides a protective and heat resisting membrane for application onto electrochromic layers and/or leads in an electrochromic display to prevent dissolution and erosion thereof as a result of contact with the display electrolyte. The membrane typically comprises (a) a long chain organic acid, preferably a water insoluble carboxylic acid, (b) optional acid reistant epoxy resin and (c) a compound selected from at least one of an amine and amide in sufficient amount to form the respective amino or amido salt of the acid, which salt together with any epoxy resin present, imparts water repellency and ionic conductivity to the membrane, and with the amine or amide being present in less than the amount required to fully cure any epoxy resin present with time and temperature so that only a minor, dispersed portion of the resin is cured. Curing of a minor, dispersed portion of the resin improves adherence and does not adversely affect the ionic conductivity of the membrane.

REFERENCES:
patent: 4115631 (1978-09-01), Deb
patent: 4120568 (1978-10-01), Deb et al.
patent: 4170406 (1979-10-01), Giglia et al.
patent: 4174152 (1979-11-01), Giglia et al.
patent: 4240713 (1980-12-01), Leibowitz

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