Di(hydroxyphenyl)-benzimidazole monomers

Details Di(hydroxyphenyl)-benzimidazole monomers Di(hydroxyphenyl)-benzimidazole monomers

1992-09-08

1993-09-14

Morris, Patricia L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5483054, 548145, C07D23518

Patent

active

052450449

ABSTRACT:
Di(hydroxyphenyl)benzimidazole monomers were prepared from phenyl-4-hydroxybenzoate and aromatic bis(o-diamine)s. These monomers were used in the synthesis of soluble polybenzimidazoles. The reaction involved the aromatic nucleophilic displacement of various di(hydroxyphenyl)benzimidazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds in the presence of an alkali metal base. These polymers exhibited lower glass transition temperatures, improved solubility, and better compression moldability over their commercial counterparts.

REFERENCES:
Sues et al., "Light-Sensitive N-alkyl-2-, etc" CA 59:11505h/11506c (1963).
Kalle & Co. Akt. Ges. "Photosensitive Materials, etc" CA 55:20738a (1961).

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