Method for the trichromatic dyeing or printing of synthetic polyamide fiber materials
View Patent ↗Method for the trichromatic dyeing or printing of synthetic polyamide fiber material, wherein at least one red reactive dye of formula is used together with at least one of the yellow or orange reactive dyes of formulae and at least one blue reactive dye of formula in which formulae the variables are as defined in claim 1, which method is distinguished by a uniform color build-up and a very good combinability.
1. A reactive dye of formula
wherein
R 1 and R 17 are each independently of the other hydrogen, or C 1 -C 4 alkyl unsubstituted or substituted by hydroxy, sulfo, sulfato, carboxy or by cyano and
Z is the radical —CH═CH 2 or —CH 2 —CH 2 —Y and Y is a leaving group.
2. A process for dyeing or printing natural or synthetic polyamide fibre material, which comprises applying to said fibre material a reactive dye of formula (1b) according to claim 1 .
3. A process according to claim 2 , for dyeing or printing synthetic polyamide fibre material.
4. A reactive dye according to claim 1 , wherein
R 1 and R 17 are each hydrogen, methyl or ethyl.
5. A reactive dye according to claim 1 , wherein
R 1 and R 17 are each hydrogen.
6. A reactive dye according to claim 1 , wherein
Y is —Cl, —OSO 3 H, —SSO 3 H, —OCO—CH 3 , —OCO—C 6 H 5 or —OPO 3 H 2 .
7. A reactive dye according to claim 1 , wherein
Y is —Cl or —OSO 3 H.