Fibre-reactive chromium complexes and their preparation and use
AssigneeCiba-Geigy Corporation
InventorsHans U. Schutz, Ulrich Schlesinger, Gerhard Back
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Abstract
The invention relates to chromium complexes of the formula ##STR1## in which B is the radical of a bidentate bianionic compound, L is H.sub.2 O, NH.sub.3, alkanol, alkylamine, dialkylamine, trialkylamine or pyridine, D is a benzene or naphthalene diazo component, Y is the nitrogen atom or the CH group, K is a coupling component, R is hydrogen, alkyl or phenyl, X is a fibre-reactive group,Ka is a cation, m is 1, 2 or 3, n is 1 or 2 and k is 0 or 1. These chromium complexes are suitable for dyeing nitrogen-containing or hydroxy-containing materials and they produce level dyeings having good all-round fastness properties.
Claims5
A chromium complex of the formula ##STR402## in which B is oxalic acid, pyrocatechol, phthalic acid, salicylic acid, sulfosalicylic acid or salicylic acid which is substituted by one or two X or which is substituted by one or two X and by sulfo or acetylamino, L is water, D is benzene which, in addition to being substituted by the metallisable group is unsubstituted or substituted by sulfo, nitro, halogen, sulfamoyl, methoxy and X, or is naphthalene which, in addition to being substituted by a metallisable group is unsubstituted or substituted by sulfo, nitro, halogen and X, K is benzene which is bonded via --O-- or --N(R)-- to the position adjacent to the azo bridge and which is unsubstituted or substituted by C.sub.1-5 -alkyl, hydroxyl, diethylamino, sulfo and X, naphthalene which is unsubstituted or substituted by chlorine, acetylamino, sulfamoyl, sulfo and the radical X, X being bonded to the naphthalene nucleus either directly or via phenylamino, 1-phenyl-3-methylpyrazol-5-one which is unsubstituted or substituted in the phenyl ring by sulfo, halogen and X, 1-(2',2"-disulfostilbene)-3-methylpyrazol-5-one which contains X in the 4"-position, acetoacetanilide which is unsubstituted or substituted in the phenyl ring by chlorine, or 1-methyl-4-hydroxyquinol-2-one, X is .alpha.,.beta.-dibromopropionyl, .alpha.-bromoacryloyl or 2,6-difluoro-5-chloropyrimidyl which is bonded via --NH--, Ka is an alkali metal cation, m is 1, 2 or 3 and n is 1 or 2.
Dependencies are inferred from the claim text.