Polybenzimidazole ester and carboxylic acid

Details Polybenzimidazole ester and carboxylic acid Polybenzimidazole ester and carboxylic acid

1987-04-13

1989-03-21

Anderson, Harold D.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525419, 525420, C08G 7318

Patent

active

048144002

ABSTRACT:
The invention discloses substituted polybenzimidazole esters produced by reacting a polybenzimidazole polymer with a halogenated ester. It also discloses substituted polybenzimidazole carboxylic acids produced by hydrolyzing the polybenzimidazole ester previously provided with a strong hydroxyl base. These substituted polybenzimidazole products may be formed into separatory media with greater use then conventional polybenzimidazole polymer articles such as to form ultrafilters. Further, the polybenzimidazole carboxylic acids may be useful as weak cation exchange resins.

REFERENCES:
patent: 4579915 (1986-04-01), Choe
patent: 4666996 (1987-05-01), Sansone

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