Process for dyeing synthetic polyamide fiber materials

A dyeing process comprising:

• dyeing a fibrous article with a coloring agent, said fibrous article containing a polyamide polymer with an amino end group content of at least 60 gram equivalents per 1000 kilograms of polyamide polymer, said coloring agent comprising at least one of the following dyeing compositions:
• A. at least one dye of the formula (1)
• F'--(SO.sub.2 --CH.dbd.CH.sub.2).sub.n ( 1)
• and at least one dye of the formula (2) ##STR43## wherein F' is the dye radical and is identical in formulas (1) and (2), the dye or dyes of the formula (1) and the dye or dyes of formula (2) being present in said coloring agent in a molar-equivalent ratio to one another, in terms of the groups --(SO.sub.2 --CH.dbd.CH.sub.2).sub.n and --›SO.sub.2 --CH.sub.2 --CH.sub.2 N(R)--V--X!.sub.n, of from 90:10% to 60:40%;
• or
• B. at least one dye of the formula (1A)
• F"--(SO.sub.2 --CH.sub.2 --CH.sub.2 --OSO.sub.3 M).sub.n ( 1A)
• or at least one dye of the formula (1)
• F"--(SO.sub.2 --CH.dbd.CH.sub.2).sub.n ( 1)
• or a combination of dyes of the formulas (1A) and (1), and, in any case, at least one compound of the formula (3) ##STR44## the dye or dyes of the formulae (1A) and (1) and, in relation to the .beta.-sulfatoethylsulfonyl and vinylsulfonyl groups, the compound or compounds of the formula (3) being present in a molar-equivalent ratio to one another of from 100:10% to 100:40%;
• wherein, in the formulae (1A), (1), (2) and (3):
• F" or F' represents the radical of a mono-, dis- or polyazo dye or heavy metal complex mono-, dis- or trisazo dye or anthraquinone, azomethanine, phenazine, stilbene, triphenylmethane, xanthene, thioxanthene, nitroaryl, naphthoquinone, perylenetetracarbimide, formazan, copper formazan, phthalocyanine, copper phthalocyanine, nickel phthalocyanine or cobalt phthalocyanine dye or triphendioxazine dye, which possesses 1 or 2 groups which impart water-solubility;
• n is the number 1 or 2;
• M is hydrogen or an alkali metal;
• R is hydrogen or alkyl of 1 to 6 carbon atoms, uninterrupted or interrupted by 1 or 2 hetero-groups and unsubstituted or substituted by a sulfo, carboxy, hydroxy, sulfato, phosphato or alkanoylamino of 2 to 5 carbon atoms;
• V is a covalent bond or alkylene of 1 to 4 carbon atoms, or a group of the formula --CO--NH--CH.sub.2 --CH.sub.2 --;
• and
• X is a group which imparts water-solubility, and wherein said dyeing of said fibrous article is carried out at a temperature ranging between 40.degree. and 130.degree. C. and at a pH of between 3 and 7.5.