Process for dyeing or printing polyamide fibres

A process for dyeing or printing synthetic polyamide fibres by a rapid fixation method, which process comprises dyeing or printing synthetic polyamide fibers with a dye or a mixture of dyes selected from the dyes of the formulae ##STR41## wherein (R.sub.1).sub.0-2 represents 0 to 2 substituents R.sub.1 which may each independently be C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, nitro, sulfamoyl, N--C.sub.1 -C.sub.4 alkylsulfamoyl, N--C.sub.1 -C.sub.2 alkoxy-C.sub.1 -C.sub.2 alkylsulfamoyl, phenylaminosulfonyl, carboxyphenylamoinosulfonyl, C.sub.1 -C.sub.4 alkylsulfonyl or acetylamino;

• ##STR42## wherein (R.sub.2).sub.0-2 represents 0 to 2 substituents R.sub.2 which may each independently be C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, nitro, sulfamoyl, N--C.sub.1 -C.sub.4 alkylsulfamoyl, N--C.sub.1 -C.sub.2 alkoxy-C.sub.1 -C.sub.3 alkylsulfamoyl, phenylaminosulfonyl, carboxyphenylaminosulfonyl, C.sub.1 -C.sub.4 alkylsulfonyl or acetylamino, and (R.sub.3).sub.0-2 represents 0 to 2 substituents R.sub.3 which may each independently be halogen, C.sub.1 -C.sub.4 alkyl, cyano or sulfamoyl;
• 1:2 cobalt complex of the dyes of the formula (2), wherein R.sub.2 has the same meaning as in the 1:2 chromium complexes and (R.sub.3).sub.0-2 represents 0 to 2 substituents R.sub.3 which may each independently be halogen, cyano or sulfamoyl;
• ##STR43## wherein R.sub.4 has the same meaning as R.sub.1 in formula (1), and R.sub.5 is hydrogen, acetylamino, methoxycarbonylamino or methylsulfonylamino;
• ##STR44## wherein R.sub.6 has the same meaning as R.sub.1 in formula (1), and (R.sub.7).sub.1-2 represents 1 to 2 substituents R.sub.7 which may each independently be halogen, methyl, methoxy or sulfo, or wherein 2 adjacent substituents R.sub.7 are able to form a closed bridge member --SO.sub.2 --CH.sub.2 --O--;
• ##STR45## wherein (R.sub.8).sub.1-2 represents 1 to 2 substituents R.sub.8 which may each independently be sulfo or nitro and R.sub.9 is hydrogen or hydroxy;
• ##STR46## wherein Z is the radical of the formula ##STR47## wherein X is the --O--SO.sub.2 --, --NH--SO.sub.2 or --NH--CO-- group and X' is oxygen or sulfur, R.sub.10 is hydrogen or C.sub.1 -C.sub.4 alkyl, Y is an unsubstituted or substituted aryl radical, n is 1, 2 or 3, the benzene ring A may be substituted by halogen and the benzene rings B and D may each independently be substituted by halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or by a radical of the formula --O--CH.sub.2 CH.sub.2 --O--R.sub.11, wherein R.sub.11 is hydrogen, methyl or ethyl;
• ##STR48## wherein R.sub.12 has the same meaning as R.sub.1 in formula (1), and R.sub.13 is hydrogen or phenyl;
• ##STR49## wherein (R.sub.14).sub.0-2 represents 0 to 2 substituents R.sub.14, which may each independently be C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxy or sulfo;
• and a mixture of the 1:2-chromium complexes of formula (10), (10a) and (10b) ##STR50## wherein (R.sub.15).sub.1-2 represents 1 to 2 substituents R.sub.15, which may each independently be sulfo or nitro, (R.sub.16).sub.1-2 represents 1 to 2 substituents R.sub.16, which may each independently be nitro, halogen, methyl or acetylamino, R.sub.17 has the same meaning as R.sub.16, independently thereof, R.sub.18 has the same meaning as R.sub.16, independently thereof, and R.sub.19 is acetylamino, methoxycarbonylamino, ethoxycarbonylamino, methylsulfonylamino or N,N-dimethylaminosulfonyl;
• 1:2 cobalt mixed complexes of the dyes of the formulae (2) and (3) or (4) and (8);
• in a continuous dyeing process or printing method, and fixing the dyeings or prints by steaming for less than 3 minutes, during which time at least 95% fixation of the dyes is achieved.