Formation of poly(benzimidazole)
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1991-11-19
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United States Patent and Trademark Office
Abstract
A poly Ressert can be formed by first reacting benzimidazole with an aliphatic diacid chloride to form bisbenzimidazole and then reacting the bisbenzimidazole with an aliphatic diacid chloride and cyanide to form the poly Reissert.