Polybenzimidazole via aromatic nucleophilic displacement

Details Polybenzimidazole via aromatic nucleophilic displacement Polybenzimidazole via aromatic nucleophilic displacement

1991-10-30

1994-05-31

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528128, 528171, 528172, 528174, 528183, 528185, 528186, 528191, 528208, 528219, 528220, 528228, 5483127, C08G 7318

Patent

active

053170784

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:
patent: 5039778 (1991-08-01), Dang et al.

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