| 摘要 |
The present invention relates to azo dyes of the formula (1), wherein Ri is hydrogen or hydroxy, R2 is hydrogen or hydroxy, at least one of the radicals R i and R2 being hydroxy, R3 is hydrogen, cyano, nitro or halogen, R4 is hydrogen, cyano, nitro or halogen, D represents a radical of the formula (2) or (3), wherein R5 denotes Ci-Cnalkyl, Ci-Cnhydroxyalkyl, Ci-Cnalkoxyalkyl, C2-Ci2alkenyl, C6-C3oaryl or C7-C36aralkyl and R6 and R7, each independently of the other, is hydrogen, Ci-Cnalkyl, Ci-Cnhydroxyalkyl, CiCnalkoxyalkyl, C6-C30aryl or C7-C36aralkyl, with the proviso that the compound of formula (1) is excluded, wherein R i is hydrogen, R 2 is hydroxy, R 3 and R4 is hydrogen and D is the radical of formula (2) wherein R 5 is ethyl, and to the use of those dye mixtures in the dyeing or printing of semi-synthetic or synthetic hydrophobic fibre materials. |
