Oxyformylated substituted polybenzimidazole article

Details Oxyformylated substituted polybenzimidazole article Oxyformylated substituted polybenzimidazole article

1987-08-17

1989-10-31

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...

525420, 525435, 528331, 528342, C08G 6926

Patent

active

048778494

ABSTRACT:
This invention discloses a process for the preparation of substituted polybenzimidazole polymers by reacting an unsubstituted polybenzimidazole polymer with a pyrocarbonate to produce an oxyformulated polybenzimidazole polymer. The oxyformulated polybenzimidazole polymer can be heated to convert it to an N-substituted polybenzimidazole polymer. Membranes, fibers and other products produced from the products of these reactions are highly resistant to chemical reactions with broad utility as fibers or membranes.

REFERENCES:
patent: 3408336 (1968-10-01), Benson
patent: 4599388 (1986-07-01), Bower et al.
patent: 4734466 (1988-03-01), Kindler et al.

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