Dye mixtures, process for their preparation and the use thereof

A dye mixture comprising at least one anionic acid dye of formula (1) ##STR45## and at least one anionic acid dye of formula (2) ##STR46## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another hydrogen or C.sub.1 -C.sub.4 alkyl,

• R.sub.5 is phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy,
• C.sub.2 -C.sub.4 alkanoylamino, carboxyl, sulfo, carbamoyl, ureido, halogen or by a radical of formula --SO.sub.2 --Z, or the radical of formula --N(R.sub.4)--R.sub.5 is a ring which may contain further hetero atoms, wherein
• Z is a group of formula --CH.dbd.CH.sub.2 or --CH.sub.2 --CH.sub.2 --Y, and Y is a leaving group,
• X.sub.1 and X.sub.2 are identical and are halogen;
• N-mono- or N,N-di-C.sub.1 -C.sub.4 alkylamino which may be substituted in the alkyl moiety by hydroxyl;
• cyclohexylamino, phenylamino, morpholino or piperidin-1-yl, and
• A.sub.1, A.sub.2 and A.sub.3 have the same meaning and are radicals of formula (16) ##STR47## wherein (R.sub.8).sub.0-2 is 0 to 2 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 C.sub.4 alkanoylamino, ureido and sulfo,
• (R.sub.11).sub.0-3 are 0 to 3 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl,
• C.sub.1 -C.sub.4 alkoxy and halogen, and
• K.sub.1 is a radical of formula (17) ##STR48## wherein R.sub.12 is methyl or carboxyl,
• R.sub.13 is amino or hydroxyl, and
• (R.sub.14).sub.0-2 is 0 to 2 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino, ureido, halogen and sulfo;
• or a radical of formula (18) ##STR49## wherein R.sub.16 is hydrogen or C.sub.1 -C.sub.4 alkyl, and R.sub.28 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino or halogen;
• or a radical of formula (12), ##STR50## wherein R.sub.18 is hydrogen or C.sub.1 -C.sub.4 alkyl,
• R.sub.19 is hydrogen, and
• R.sub.20 is hydrogen, C.sub.1 -C.sub.4 alkyl, or phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino, ureido, halogen or sulfo;
• or a radical of formula (19) ##STR51## wherein (R.sub.21).sub.0-2 is 0 to 2 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino, ureido, halogen and sulfo, and
• R.sub.22 is hydrogen or C.sub.1 -C.sub.4 alkyl;
• or a radical of formula (20) ##STR52## wherein R.sub.23 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino or halogen, and
• R.sub.24 is hydrogen or C.sub.1 -C.sub.4 alkyl;
• or radicals of formulae (21) or (22) ##STR53## wherein R.sub.29 is hydrogen or hydroxyl.