GB1070118A - Anthraquinone dye mixtures and their preparation - Google Patents

Abstract

The invention comprises a dye mixture having a content of 2 to 98 mole per cent of an anthraquinone dye having the formula <FORM:1070118/C4-C5/1> wherein Ar represents a substituted or unsubstituted aryl radical, the radicals R1 and R2 represent hydrogen atoms and/or alkyl, aralkyl cycloalkyl, aryl or heterocyclic radicals which may bear OH, NH2, alkoxy or substituted amino groups, or together with the N atom form a heterocyclic ring, n represents an integer from 1 to 4 and R represents a halogen atom, and 98 to 2 mole per cent of an anthraquinone dye having the general Formula I in which R represents the radical <FORM:1070118/C4-C5/2> The mixtures may be obtained by mixing the individual dyes or by treating an appropriate mixture of compounds of the formulae <FORM:1070118/C4-C5/3> <FORM:1070118/C4-C5/4> wherein Ar1 represents a substituted or unsubstituted aryl radical, with chlorosulphonic acid or oleum and a halogenating agent and then treating the sulphochloride compounds with at least a stoichiometric quantity of a compound of the formula <FORM:1070118/C4-C5/5> Specified aryl radicals are pheny, naphthyl and diphenyl radicals. The aryl radicals may bear halogen atoms, alkyl, alkoxy, aryloxy, carboxylic acyl, hydroxy and acid groups. Examples are given for the production of the dyestuff mixtures. They are useful for dyeing or printing textile materials, and other natural or synthetic materials bright violet shades.