Aromatic polymers containing a nitrogen-containing ring group, a

Details Aromatic polymers containing a nitrogen-containing ring group, a Aromatic polymers containing a nitrogen-containing ring group, a

1975-05-29

1978-04-18

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 2R, 260 2M, 260 2S, 260 2P, 260 47CP, 260 47CB, 260 47CZ, 260 304N, 260 308DS, 260 312N, 260 61, 260 775C, 260 775A, 260 775B, 260 775AA, 260 775D, 260 78R, C08G 7104, C08G 7318, C08G 7306

Patent

active

040850900

ABSTRACT:
Novel aromatic polymers containing a nitrogen-containing ring group which comprises at least 30 mol% of a recurring unit of the formula ##STR1## Preferably,, the nitrogen-containing ring group ##STR2## is a benzimidazolone, benzimidazolthione, benzimidazole, quinoxalidinedione, benzotriazole, benzothiazolidine, benzothiadiazolidine-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 substantially linear aromatic polymers comprising at least 30 mol% of a recurring unit of the formula ##STR3## with reagents capable of forming 5- or 6-membered nitrogen-containing rings.

REFERENCES:
patent: 3630994 (1971-12-01), Culbertson
patent: 3708439 (1973-01-01), Sayigh et al.
patent: 3920768 (1975-11-01), Kwiatkowski

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