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 yellow-dyeing dye mixture comprising at least one dye of the general formula (V)
and at least one dye of the general formula (VI)
where
R 7 and R 8 represent hydrogen, methyl, methoxy or —SO 3 M;
Y 4 , Y 5 and Y 6 independently represent vinyl or β-sulfatoethyl;
D 1 represents a group of the formula
and
M represents hydrogen, sodium or potassium.
2. The dye mixture according to claim 1 comprising a dye of the general formula (IX)
where
R 13 represents (C 2 -C 4 )-alkanoylamino, ureido, sulfamoyl or acetyl;
Y 11 represents vinyl or β-sulfatoethyl; and
D 3 has one of the meanings of D 1 .
3. The dye mixture according to claims 1 or 2 comprising dyes of the general formulae (V) and (VI) wherein
R 7 and R 8 represent hydrogen;
Y 4 , Y 5 and Y 6 represent vinyl or β-sulfatoethyl;
D 1 represents a group of the formula
and
M represents hydrogen, sodium or potassium.
4. The dye mixture as claimed in claim 1 , wherein the dye of the formula (V) is present in amounts from 10% to 90% by weight and the dye of the general formula (VI) is present in amounts from 10% to 90% by weight, based on the total dye content.
5. The dye mixture as claimed in claim 1 , wherein the dye of the formula (V) is present in amounts from 50% to 80% by weight based on the total dye content.
6. The dye mixture as claimed in claim 2 , wherein the dye of the formula (V) is present in amounts from 10% to 30% by weight, the dye of the general formula (VI) is present in amounts from 20% to 50% by weight and the dye of the general formula (IX) is present in amounts from 20% to 70% by weight, based on the total dye content.
7. The dye mixture as claimed in claim 3 , wherein the dye of the formula (V) is present in amounts from 10% to 30% by weight, the dye of the general formula (VI) is present in amounts from 20% to 50% by weight and the dye of the general formula (IX) is present in amounts from 20% to 70% by weight, based on the total dye content.
8. A process for mono-, di- or trichromatic dyeing and printing of natural and synthetic polyamide fiber material which comprises contacting the material with the dye mixture as claimed in claim 1 .
9. The process of preparing the dye mixture as claimed in claim 1 , which comprises mechanically mixing the individual dyes.