Modified polybenzimidazole polymer membranes

Details Modified polybenzimidazole polymer membranes Modified polybenzimidazole polymer membranes

1986-06-25

1988-03-29

Lilling, Herbert J.

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

Synthetic resins

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

528341, 528342, C08G 6926, C08G 6928, C08G 7318, C08L 6900

Patent

active

047344660

ABSTRACT:
The invention provides a substituted polybenzimidazole product produced by employing a cyclic carbonate to attach hydroxyalkyl substituents at the reactive imidazole hydrogen sites on the polybenzimidazole polymer. The substituted polybenzimidazole polymer membranes produced by this process exhibit improved hydrophilicity and chemical stability over prior art polybenzimidazole membranes. Substituted polybenzimidazole polymer ultrafilters produced by this process filter a broad range of molecular weight compounds.

REFERENCES:
patent: 3758644 (1971-05-01), Trischler
patent: 4020142 (1977-04-01), Davis et al.
patent: 4599388 (1986-07-01), Bower et al.

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