Mixture of reactive dyes and their use for the dyeing or printing of textile fibre materials
A dye mixture comprising at least one dye of formula (formula) and at least one dye of formula (formula), wherein R 1 is hydrogen or C 1 -C 4 alkyl, R 2 is hydrogen or C 1 -C 4 alkyl, C 1 -C 4 alkoxy or sulfo, Q 1 is a fibre-reactive radical of formula —(CH 2 ) 2- 3 —SO 2 —Y 2 (3a) or —(CH 2 ) 2-3 —O—(CH 2 ) 2-3 —SO 2 —Y 3 (3b), Q 2 has the meaning of Q 1 , or is hydrogen or C 1 -C 4 alkyl, X 1 and X 2 are each independently of the other halogen, 3-carboxypyridin-1-yl or 3-carbamoylpyridin-1-yl, Y 1 , Y 2 and Y 3 are each independently of the others vinyl or a radical —CH 2 —CH 2 —U and U is a group removable under alkaline conditions, Z 1 and Z 2 are each independently of the other —S0 2 -Y, wherein Y is vinyl or a radical —CH 2 —CH 2 —U and U is a group removable under alkaline conditions, M is hydrogen, an alkali metal or one equivalent of an alkaline earth metal, k and n are each independently of the other the number 0, 1 or 2, I and q are each independently of the other the number 0 or 1, m is the number 0 or 1, and wherein the diazo component of the dye of formula (1) and the diazo component of the dye of formula (2) each independently of the other are a benzene radical or a naphthyl radical, are suitable especially for the dyeing or printing of cellulosic fibre materials, exhibit a good build-up, a good fixation rate and good washing off properties of the unfixed dyes, and good all-round fastness properties.
1. A dye mixture comprising at least one dye of formula
and at least one dye of formula
wherein
R 1 is hydrogen or C 1 -C 4 alkyl,
R 2 is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy or sulfo,
Q 1 is a fibre-reactive radical of formula
—(CH 2 ) 2-3 —SO 2 —Y 2 (3a) or
—(CH 2 ) 2-3 —O—(CH 2 ) 2-3 —SO 2 —Y 3 (3b),
Q 2 has the meaning of Q 1 , or is hydrogen or C 1 -C 4 alkyl,
X 1 and X 2 are each independently of the other halogen, 3-carboxypyridin-1-yl or 3-carbamoylpyridin-1-yl,
Y 1 , Y 2 and Y 3 are each independently of the others vinyl or a radical —CH 2 —CH 2 —U and U is a group removable under alkaline conditions,
Z 1 and Z 2 are each independently of the other —SO 2 —Y, wherein Y is vinyl or a radical —CH 2 —CH 2 —U and U is a group removable under alkaline conditions,
M is hydrogen, an alkali metal or one equivalent of an alkaline earth metal,
k and n are each independently of the other the number 0, 1 or 2,
I and q are each independently of the other the number 0 or 1,
m is the number 0 or 1, and
wherein the diazo component of the dye of formula (1) and the diazo component of the dye of formula (2) each independently of the other are a benzene radical or a naphthyl radical.
2. A dye mixture according to claim 1 , wherein the diazo component of the dye of formula (1) and the diazo component of the dye of formula (2) each are a naphthyl radical.
3. A dye mixture according to claim 1 , wherein I and q each are the number 0.
4. A dye mixture according to claim 1 , wherein m is the number 0.
5. A dye mixture according to claim 1 , wherein the dye of formula (1) is a dye of formula
wherein
R 1 , R 2 , X 1 , Y 1 , M and k each have the meanings given in claim 1 .
6. A dye mixture according to claim 1 , wherein the dye of formula (2) is a dye of formula
wherein
Q 1 , Q 2 , X 2 , M and n each have the meanings given in claim 1 .
7. A dye mixture according to claim 1 , wherein k and n each independently of the other are the number 1 or 2.
8. A dye mixture according to claim 1 , wherein R 2 is hydrogen or sulfo.
9. A dye mixture according to claim 1 , wherein X 1 and X 2 each are halogen.
10. A dye mixture according to claim 1 , wherein Y 1 , Y 2 and Y 3 are each independently of the others vinyl or a radical —CH 2 —CH 2 —U and U means Cl or —OSO 3 M, wherein M has the meanings given in claim 1 .
11. A dye mixture according to claim 1 , wherein Q 1 and Q 2 are each a fibre-reactive radical of formula (3a).
12. A method for the dyeing or printing of hydroxy-group-containing or nitrogen-containing fibre materials, which method comprises contacting the fibre material with a dye mixture according to claim 1 .
13. A method according to claim 12 , wherein the fibre material comprises cellulosic fibre material.
14. A reactive dye of formula
wherein
R 1 is hydrogen or C 1 -C 4 alkyl,
R 2 is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy or sulfo,
X 1 is halogen, 3-carboxypyridin-1-yl or 3-carbamoylpyridin-1-yl,
Y 1 is vinyl or a radical —CH 2 —CH 2 —U and U is a group removable under alkaline conditions,
Z 1 is —SO 2 —Y, wherein Y is vinyl or a radical —CH 2 —CH 2 —U and U is a group removable under alkaline conditions,
M is hydrogen, an alkali metal or one equivalent of an alkaline earth metal,
k is the number 0, 1 or 2,
l is the number 0 or 1, and
wherein the diazo component of the dye of formula (1b) is a benzene radical or a naphthyl radical.
15. The reactive dye of claim 14 , wherein R 2 is sulfo.
16. A method for the dyeing or printing of hydroxy-group-containing or nitrogen-containing fibre materials, which method comprises contacting the fibre material with the reactive dye according to claim 15 .
17. The method according to claim 16 , wherein the fibre material comprises cellulosic fibre material.
18. An aqueous ink comprising the dye mixture according to claim 1 .
19. An aqueous ink comprising the reactive dye according to claim 15 .