Aromatic polymers containing a nitrogen-containing ring...

Details Aromatic polymers containing a nitrogen-containing ring... Aromatic polymers containing a nitrogen-containing ring...

C - Chemistry, Metallurgy

08

G

402/2

C08G 83/00 (2006.01) B01D 71/62 (2006.01) C08G 73/00 (2006.01) C08G 73/06 (2006.01)

Patent

CA 1093735

ABSTRACT OF THE DISCLOSURE Novel aromatic polymers containing a nitrogen-containing ring group which comprises at least 30 mol% of a recurring unit of the formula Image . Preferably, the nitrogen-containing ring group Image is a benzimidazolone, benzimidazolthione, benzimidazole, quinoxalidinedione, benzotriazole, benzothiazolidine, benzo- thiadiazolidine-S-oxide, benzothiadiazolidine-S-dioxide, benzodithiadiazine, benzodiazophosphole-P-oxide, benzodiazophosphole, benzodiazosilole, or benzodiazoborole ring. These polymers are soluble in various polar solvents. They find a wide range of applications ascribable to these ring groups, for example, as thermally stable resins and permselective membranes. These polymers can be prepared by reacting substan- tially linear aromatic polymers comprising at least 30 mol% of a recurring unit of the formula Image with reagents capable of forming 5- or 6-membered nitrogen- containing rings.

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