Mixtures of reactive dyes and their use

1 . A dye mixture comprising a reactive dye having at least one structural unit of formula

together with a reactive dye of formula

wherein

(Q 1 ) 0-3 and (Q 2 ) 0-3 each independently of the other denote from 0 to 3 identical or different substituents selected from the group halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, carboxy and sulfo,

Z 1 and Z 2 are each independently of the other a fibre-reactive radical,

at least one fibre-reactive radical being contained in the dye of formula (1) and the dye of formula (2) containing at least one fibre-reactive radical Z 1 or Z 2 .

2 . A dye mixture according to claim 1 , wherein the reactive dye having at least one structural unit of formula (1) corresponds to a dye of formula

wherein

D 1 , D 2 and D3 are each independently of the others the radical of a diazo component of the benzene or naphthalene series, wherein at least one of the radicals D 1 , D 2 and D 3 contains a fibre-reactive radical.

3 . A dye mixture according to claim 1 , wherein D 1 , D 2 and D 3 each independently of the others correspond to a radical of formula (5) or (6)

wherein

K is the radical of a coupling component of formula (7a) or (7b)

and

Z 3 and Z 4 are each independently of the other a radical of formula (3a), (3b), (3c), (3d), (3e) or (3f)

wherein

R 1a and R 2 are hydrogen,

HaI is bromine,

Y is vinyl, beta-chloroethyl or beta-sulfatoethyl,

T 1 is C 1 -C 4 alkoxy, C 1 -C 4 alkylthio, hydroxy, amino, N-mono- or N,N-di-C 1 -C 4 alkylamino unsubstituted or substituted in the alkyl moiety or moieties by hydroxy, sulfato or by sulfo, morpholino, or phenylamino or N—C 1 -C 4 alkyl-N-phenylamino (wherein the alkyl is unsubstituted or substituted by hydroxy, sulfo or by sulfato) each unsubstituted or substituted in the phenyl ring by sulfo, carboxy, acetylamino, chlorine, methyl or by methoxy, or naphthylamino unsubstituted or substituted by from 1 to 3 sulfo groups, or is a fibre-reactive radical of formula (4b′), (4c′) or (4d′)

and Y is as defined above,

X 1 is chlorine or fluorine,

m and I are each independently of the other the number 2 or 3,

(R 4 ) 0-3 and (Q 3 ) 0-3 each independently of the other denote from 0 to 3 identical or different substituents selected from the group halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, carboxy and sulfo,

R′ 5 is hydrogen, sulfo or C 1 -C 4 alkoxy unsubstituted or substituted in the alkyl moiety by hydroxy or by sulfato, and

R′ 5a is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, C 2 -C 4 alkanoylamino, ureido or a radical of formula (3f) wherein the radicals R 1a , T 1 and X 1 are as defined above.

4 . A dye mixture according to claim 1 , wherein the radicals D 1 , D 2 and D 3 each independently of the others correspond to a radical of formula (5a), (5b), (5c), (5d), (5e) or (6a)

wherein

R′ 5 is hydrogen, sulfo or ethoxy unsubstituted or substituted in the alkyl moiety by hydroxy or by sulfato,

R′ 5a is hydrogen, methyl, ethyl, methoxy, ethoxy, acetylamino, propionylamino or ureido,

(Q 3 ) 0-2 denotes from 0 to 2 identical or different substituents selected from the group C 1 -C 4 alkyl, C 1 -C 4 alkoxy and sulfo,

Y 1 is a group —CH(Br)—CH 2 —Br or —C(Br)═CH 2 ,

Y is vinyl, beta-chloroethyl or beta-sulfatoethyl, and

m is the number 2 or 3.

5 . A dye mixture according to claim 1 , wherein the reactive dye of formula (2) is a dye of formula

wherein

(Q 1 ) 0-2 and (Q 2 ) 0-2 each independently of the other denote from 0 to 2 identical or different substituents selected from the group C 1 -C 4 alkyl, C 1 -C 4 alkoxy and sulfo, and

Z 1 and Z 2 are as defined in claim 1 .

6 . A dye mixture according to claim 5 , wherein

Z 1 and Z 2 are each independently of the other a radical of formula (3a), (3b), (3c), (3d), (3e) or (3f)

wherein

Y is vinyl, beta-chloroethyl or beta-sulfatoethyl,

HaI is bromine,

R 2 and R 1a are hydrogen,

I and m are each independently of the other the number 2 or 3,

X, is fluorine or chlorine,

T 1 is C 1 -C 4 alkoxy, C 1 -C 4 alkylthio, hydroxy, amino, N-mono- or N,N-di-C 1 -C 4 alkylamino unsubstituted or substituted in the alkyl moiety or moieties by hydroxy, sulfato or by sulfo, morpholino, or phenylamino or N—C 1 -C 4 alkyl-N-phenylamino (wherein the alkyl is unsubstituted or substituted by hydroxy, sulfo or by sulfato) each unsubstituted or substituted in the phenyl ring by sulfo, carboxy, acetylamino, chlorine, methyl or by methoxy, or naphthylamino unsubstituted or substituted by from 1 to 3 sulfo groups, or T 1 is a fibre-reactive radical of formula (4a′), (4b′), (4c′), (4d′) or (4f′)

wherein

Y is as defined above, and

Y 1 is a group —CH(Br)—CH 2 —Br or —C(Br)═CH 2 .

7 . A dye mixture according to claim 1 , comprising a dye of formula

together with a dye of formula

wherein

D 1 , D 2 and D 3 are each independently of the others a radical of formula (5a), (5b) or (6a)

wherein

R′ 5 is hydrogen, sulfo or ethoxy unsubstituted or substituted in the alkyl moiety by hydroxy or by sulfato,

R′ 5a is hydrogen, methyl, ethyl, methoxy, ethoxy, acetylamino, propionylamino or ureido,

(Q 1 ) 0-2 , (Q 2 ) 0-2 and (Q 3 ) 0-2 each independently of the other denote from 0 to 2 identical or different substituents selected from the group C 1 -C 4 alkyl, C 1 -C 4 alkoxy and sulfo,

Y is vinyl or beta-sulfatoethyl, and

Z 1 and Z 2 are each independently of the other a radical of formula (3a), (3b), (3c), (3d), (3e) or (3f)

wherein

Y is vinyl, beta-chloroethyl or beta-sulfatoethyl,

HaI is bromine,

R 1a and R 2 are hydrogen,

I and m are each independently of the other the number 2 or 3,

X 1 is fluorine or chlorine, and

T 1 is a fibre-reactive radical of formula (4b′), (4c′) or (4d′)

wherein

Y is as defined above.

8 . A dye mixture according to claim 1 , which additionally comprises a dye of formula

wherein

R 6 and R 7 are each independently of the other hydrogen or C 1 -C 4 alkyl, and

D 6 and D 7 are each independently of the other the radical of a-diazo component of the benzene or naphthalene series.

9 . A method of dyeing or printing a substrate with a dye mixture according to claim 1 comprising applying a tinctorially effective amount of the dye mixture to the said substrate wherein the substrate is a hydroxyl-group-containing or nitrogen-containing fibre material.

10 . A method according to claim 9 , wherein the substrate is a cellulosic fibre material.

11 . An aqueous ink comprising a dye mixture according to claim 1 .

12 . A method for ink jet printing comprising applying a tinctorially effective amount of an aqueous ink containing a dye mixture according to claim 11 to a substrate wherein the substrate is a hydroxyl-group-containing or nitrogen-containing fibre material.

13 . A method according to claim 10 , wherein the substrate is a cotton fibre material.