Process for the preparation of poly[3,6-N-substituted carbazole-

Details Process for the preparation of poly[3,6-N-substituted carbazole- Process for the preparation of poly[3,6-N-substituted carbazole-

1984-10-25

1986-07-08

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528327, 528363, C08G 7306, C08G 7308

Patent

active

045993998

ABSTRACT:
A one-step process for the preparation of poly[3,6-N-substituted carbazole-1,3,4-oxadiazole-2,5-diyl] which comprises polymerizing N-substituted carbazole-3,6-dicarboxylic acid, wherein the carbazole nitrogen is substituted with lower alkyl of 1 to 6 carbon atoms or phenyl, with a 0 to 30% molar excess of hydrazine or a hydrazine salt of a non-oxidizing acid in the presence of polyphosphoric acid.

REFERENCES:
patent: 3734893 (1973-05-01), Studinka et al.

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