Mono-, di-or trichromatic dyeing or printing of natural or synthetic polyamide fiber materials
View Patent ↗The present invention relates to processes for mono-, di- or trichromatic dyeing or printing of natural or synthetic polyamide fiber materials, these processes utilizing a) blue-dyeing dye mixture, b) a red-dyeing dye mixture and/or c) a yellow-dyeing dye mixture, and also blue-dyeing, red-dyeing and yellow-dyeing dye mixtures and processes for their preparation.
1. A red-dyeing dye mixture comprising at least one dye of the general formula (III)
in an amount of 20% to 80% by weight, based on the total dye content, and at least one dye of the general formula (IV)
in an amount 20% to 80% by weight, based on the total dye content,
where
R 5 represents hydrogen or —SO 3 M;
R 6 represents hydrogen;
Y 2 and Y 3 independently represent vinyl or β-sulfatoethyl; and
M represents hydrogen, sodium or potassium.
2. The dye mixture according to claim 1 further comprising a dye of the general formula (VIII)
where
W represents a group of the formula
and may additionally represent a group of the formula
when D 2 comprises a fiber-reactive radical
Y 9 represents vinyl or β-sulfatoethyl;
D 2 represents a group of the formula
and
M represents hydrogen, sodium or potassium.
3. The dye mixture according to claim 2 comprising dyes of the general formulae (III), (IV) and (VIII) wherein R 5 represents —SO 3 M, R 6 hydrogen,
W represents a group of the formula
and D 2 represents a group of the formula
where Y 9 represents vinyl or β-sulfatoethyl and M represents hydrogen, sodium or potassium.
4. The dye mixture as claimed in claim 1 , wherein
R 5 represents hydrogen.
5. The dye mixture as claimed in claim 1 , wherein
R 5 represents —SO 3 M.
6. The dye mixture as claimed in claim 4 , wherein
M represents sodium or potassium.
7. The dye mixture as claimed in claim 4 , wherein
M represents sodium.
8. A process for mono-, di- or trichromatic dyeing and printing of natural and synthetic polyamide fiber material which comprises contacting the dye mixture as claimed in claim 1 with the fiber material.