Process for producing discharge reserve prints on textile materials with amino-azo-benzene dyes

In the process for production of discharge reserve prints on textile materials comprising water-repellent fibers or mixed water-repellent and cellulose fibers wherein a disperse dyestuff which is dischargeable to white is applied to the textile material in the form of a dye liquor or dye printing paste, at least partially drying the textile material, applying a discharge reserve printing paste to the material by printing on the material in the desired pattern and subsequently heating the printed material at temperatures from 100.degree. to 230.degree. C.,

• the improvement comprises (a) the discharge reserve printing paste containing, as the discharging agent, an alkaline material which produces a pH value of at least 8 in 5% strength aqueous solution and (b) the disperse dyestuff which is dischargeable to white is a disperse dyestuff of the formula ##STR15## wherein X.sup.1, X.sup.2 and X.sup.3 independently of one another are nitro, cyano, alkylsulphonyl having 1 to 4 carbon atoms, phenylsulphonyl chlorophenylsulphonyl, bromophenylsulphonyl, tolylsulphonyl, cyanophenylsulphonyl, dialkylphosphono having 1 to 4 carbon atoms in each alkyl moiety, aminosulphonyl, alkylaminosulphonyl having 1 to 4 carbon atoms in the alkyl moiety, dialkylaminosulphonyl having 1 to 4 carbon atoms in each alkyl moiety, or trifluoromethyl, said alkylaminosulphonyl and dialkylaminosulphonyl being unsubstituted or alkyl substituted by hydroxy, methoxy, ethoxy or methoxyethoxy;
• with the proviso that not more than 2 of X.sup.1, X.sup.2 and X.sup.3 are said aminosulphonyl, said unsubstituted or substituted alkylaminosulphonyl, said unsubstituted or substituted dialkylaminosulphonyl, said trifluoromethyl, said dialkylphosphono, said alkylsulphonyl, said phenylsulphonyl, said chlorophenylsulphonyl, said bromophenylsulphonyl, said tolylsulphonyl, or said cyanophenylsulphonyl,
• Y.sub.1 and Y.sup.2 independently of one another are each hydrogen, chloro, bromo, alkyl of 1 to 4 carbon atoms, substituted alkyl of 1 to 4 carbon atoms substituted by 1 or 2 hydroxyls, alkoxy having 1 to 4 carbon atoms, or substituted alkoxy having 1 to 4 carbon atoms substituted by hydroxyl or disubstituted by hydroxyl or alkoxy having 3 to 8 carbon atoms and being optionally monosubstituted or polysubstituted by hydroxyl and wherein the carbon chain is interrupted by 1 to 3 oxygen atoms;
• Y.sup.2 is additionally --NHCOZ wherein Z is methyl, ethyl, propyl or i-propyl unsubstituted or substituted by hydroxyl, chloro, bromo, cyano, phenyl, phenoxy or Z is alkyl of 3 to 8 carbon atoms interrupted between one and three times by oxygen which is unsubstituted or substituted by hydroxyl, phenyl, amino or N-alkylamino having 1 to 4 carbon atoms;
• R.sup.1 is hydrogen or alkyl having 1 to 4 carbon atoms substituted by at least one substituent selected from chloro, bromo, cyano, hydroxyl, methoxy, ethoxy, phenyl, phenoxy, and alkylaminocarbonyloxy having 1 to 4 carbon atoms in the alkyl moiety;
• or R.sup.1 is additionally alkenyl having 3 to 4 carbon atoms, benzyl, cycloalkyl having 5 to 6 carbon atoms, or alkyl having 3 to 8 carbon atoms wherein the carbon chain is interrupted by 1 to 3 oxygen atoms and is unsubstituted or substituted by hydroxyl, chloro, bromo or cyano;
• R.sup.2 is alkyl having 3 to 8 carbon atoms wherein the carbon chain is interrupted by 1 to 3 oxygen atoms and is unsubstituted or substituted by hydroxyl, chloro, bromo or cyano.