| 摘要 |
Dyestuffs of the formula <IMAGE> WHEREIN R1 denotes halogen, alkyl, cycloalkyl, aralkyl, nitro, cyano, acyl, acylamino, amino, aminocarbonyl, aminosulphonyl, alkylsulphonyl, arylsulphonyl, alkoxy, aryloxy, aralkoxy, carboxyl, alkoxycarbonyl, aryloxycarbonyl or aralkoxycarbonyl or arylazo, R2 denotes alkyl, alkenyl, cycloalkyl, aryl or aralkyl, R3 and R4 denote alkyl, cycloalkyl or aralkyl, R5, R6, R7 and R8 denote hydrogen, alkyl, cycloalkyl, aralkyl or aryl, AND WHEREIN R6 and R7 can together form a fused cycloaliphatic ring, A denotes aryl or heteryl, N DENOTES 0, 1 OR 2 AND An(-) denotes an anion, PROCESS FOR THEIR PREPARATION AND THEIR USE FOR DYEING AND PRINTING ESPECIALLY POLYACRYLONITRILE AND ACID MODIFIED POLYAMIDES AND POLYESTERS. |
