Mixtures of disperse dyes
View Patent ↗The present invention relates to dye mixtures which comprise at least one dye of the formula (I) and at least one dye of the formula (II) in which R 1 , R 2 , R 3 , and X are defined as stated in claim 1 , to processes for their preparation, and to their use.
1. A dye mixture which consists of at least one dye of the formula (I)
in which
R 1 is (C 1 -C 4 )-alkyl or (C 1 -C 4 )-alkoxy-(C 1 -C 4 )-alkyl; and
R 2 is (C 1 -C 4 )-alkoxy;
and at least one dye of the formula (II)
in which
X is chloro or bromo; and
R 3 is (C 1 -C 4 )-alkyl and
wherein the dyes of the formulae (I) and (II) are present in amounts each of 20% to 80% by weight.
2. The dye mixture as claimed in claim 1 , wherein R 1 is ethyl, R 2 is methoxy, and R 3 is methyl.
3. The dye mixture as claimed in claim 2 , wherein X is bromo.
4. The dye mixture as claimed in claim 3 , wherein the dyes of the formula (I) are present in amounts of 30% to 45% by weight and the dyes of the formula (II) are present in amounts of 55% to 70% by weight.
5. The dye mixture as claimed in claim 3 , wherein the dyes of the formula (I) are present in amounts of 38.7% by weight and the dyes of the formula (II) are present in amounts of 61.3% by weight.
6. The dye mixture as claimed in claim 1 , wherein X is bromo.
7. The dye mixture as claimed in claim 1 , wherein the dyes of the formula (I) are present in amounts of 30% to 45% by weight and the dyes of the formula (II) are present in amounts of 55% to 70% by weight.
8. The dye mixture as claimed in claim 1 , wherein the dyes of the formula (I) are present in amounts of 38.7% by weight and the dyes of the formula (II) are present in amounts of 61.3% by weight.
9. A process for preparing the dye mixture as claimed in claim 1 which comprises mechanically mixing the dyes of the formulae (I) and (II).
10. A process for dyeing or printing a hydrophobic material which comprises contacting the material with the dye mixture as claimed in claim 1 .
11. The process as claimed in claim 10 , wherein the process is for digital printing by an ink jet process.
12. The process as claimed in claim 11 , wherein the material is a textile material.
13. A process for preparing the dye mixture as claimed in claim 3 which comprises mechanically mixing the dyes of the formulae (I) and (II).
14. A process for dyeing or printing a hydrophobic material which comprises contacting the material with the dye mixture as claimed in claim 3 .
15. The process as claimed in claim 14 , wherein the process is for digital printing by an ink jet process.
16. The process as claimed in claim 15 , wherein the material is a textile material.