Method of producing aromatic polythiazole

Details Method of producing aromatic polythiazole Method of producing aromatic polythiazole

1991-02-20

1993-06-08

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528183, 528336, C08G 7532

Patent

active

052180816

ABSTRACT:
An aromatic polythiazole is produced from a salt of an aromatic diaminodithiol compound and a dicarboxylic acid derivative, by a method comprising the steps of: (a) reacting the aromatic diaminodithiol compound salt with an alkyl halide having a substituted or unsubstituted alkyl group in an alkaline aqueous solvent, so that hydrogen atoms in thiol groups of the aromatic diaminodithiol compound are substituted with the alkyl groups; (b) polymerizing the resulting alkyl group-substituted aromatic diaminodithiol compound with the dicarboxylic acid derivative to form an aromatic polythiazole prepolymer; and (c) heating the aromatic polythiazole prepolymer to cause a thiazole ring closure reaction, thereby producing the aromatic polythiazole. By this method, the amino groups of the aromatic diaminodithiol compound salt are selectively reacted with the dicarboxylic acid derivative.

REFERENCES:
patent: 4622285 (1986-11-01), Ahne
Makromolekulare Chemei, vol. 191, No. 9, pp. 2017-2026, 1990.

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