Process for preparing poly((benzo(1,2-D:5,4-D')bisthiazole-2,6-d

Details Process for preparing poly((benzo(1,2-D:5,4-D')bisthiazole-2,6-d Process for preparing poly((benzo(1,2-D:5,4-D')bisthiazole-2,6-d

1983-10-17

1990-06-26

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528341, C08G 6900, C08G 7532

Patent

active

049373218

ABSTRACT:
A process for preparing poly{[benzo (1,2-d:5,4-d')bisthiazole-2,6-diyl]-1,4-phenylene} or one of the reactants used in the preparation of such polymer by the use of an electrolytic cell. In the process, thiocyanate ions are oxidized to thiocyanogen in the anode chamber of the cell. In a preferred embodiment, the cathode chamber of the same electrolytic cell is used to reduce 4,6-dithiocyanobenzene-1,3-diamine to form the dithio radical of 4,6-diaminobenzene-1,3-dithiol. Upon hydrogenation, the dithiol or its acid salt may be used to react with terephthalic acid to form the polymer.

REFERENCES:
patent: 4051108 (1977-09-01), Helminiak et al.
patent: 4487735 (1984-12-01), Chenevey et al.

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