Rendering polybenzimidazole solid materials more resistant to da

Details Rendering polybenzimidazole solid materials more resistant to da Rendering polybenzimidazole solid materials more resistant to da

1975-02-11

1977-09-13

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 308DS, 260 326N, 260 37N, 260 4575B, 260 4575C, 260 4575F, C08K 322, C08K 330, C08K 534, C08K 536

Patent

active

040481395

ABSTRACT:
A route is provided for the formation of a polybenzimidazole solid material having an enhanced resistance to undergo the usual color darkening upon exposure to light. A minor concentration of a finely divided pigment found capable of stabilizing the background color inherently manifest by the polybenzimidazole polymer is dispersed in a solution of the polybenzimidazole, and the solvent is removed to produce a polybenzimidazole solid having the pigment substantially uniformly distributed therein. The pigment utilized may be arsenic thioarsenate, copper phthalocyanine, anatase titanium dioxide, or mixtures thereof. Fibers, films, three-dimensional shaped articles, etc. may be formed from the color stabilized polybenzimidazole.

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"Handbook of Adhesives", 1962, Skeist, pp. 223, 447.

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