Sulfoalkylation of polybenzimidazole

Details Sulfoalkylation of polybenzimidazole Sulfoalkylation of polybenzimidazole

1987-07-24

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...

525390, 525420, C08G 7318

Patent

active

048143995

ABSTRACT:
A substituted polybenzimidazole polymer is disclosed wherein sulfoalkyl derivatives of polybenzimidazole are produced by the reaction of a polybenzimidazole polymer with a sultone. Beta sultones may be directly reacted with the polybenzimidazole polymer to produce a sulfoethyl derivative of polybenzimidazole. However, when gamma, delta or eta sultones are used, the polybenzimidazole polymer preferably is first reacted with an alkali hydride to produce the polyanion of polybenzimidazole. The polybenzimidazole polyanion is then reacted with the sultone to produce a sulfoalkyl derivative of polybenzimidazole polymer. These derivatives may find great use as ion exchange devices or for reverse osmosis or ultrafiltration devices.

REFERENCES:
patent: 3842044 (1974-10-01), Cleary
patent: 4666996 (1987-05-01), Sansone

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