| 摘要 |
Cationic 1,3,4-thiadiazole dyestuffs of the general formula <IMAGE> wherein R denotes hydrogen or an alkyl, alkenyl, acyl, cycloalkyl, aryl, aralkyl, amino, alkylamino, dialkylamino, arylamino, aralkylamino or heterocyclic radical and R1 denotes hydrogen or an alkyl, alkenyl or aralkyl radical, or R and R1 are linked to form a heterocyclic ring, with the condition that if R denotes aryl, R1 cannot be hydrogen. R2 denotes an alkyl, alkenyl, alkinyl or aralkyl radical, K denotes a radical of a coupling component and An(-) denotes an anion, are suitable for the dyeing and printing of natural and synthetic materials, in particular of polyacrylnitrile and acid-modified polyesters and polyamides.
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