Copper, cobalt or chromium complex monoazo compounds, processes for

Abstract

Water-soluble copper, cobalt and chromium complex monoazo compounds of which the metal-free monoazo compound contains as diazo component an aminophenol or aminonaphthol compound subtituted by a fiber-reactive radical of the vinyl sulfone series, the aminophenol possibly being substituted by a lower alkyl, lower alkoxy, nitro, sulfonic acid group, or a chlorine or bromine atom and the naphthol possibly being substituted by a sulfo group, and as coupling component a 6-sulfonaphthol(8) which may be substituted by a sulfo group in the adjacent aromatic nucleus and must be substituted by the monoamide radical of succinic acid, glutaric acid or adipic acid. They are prepared by diazotization of the corresponding aniline and naphthylamine compounds containing, in o-position to the amino group, a hydrogen atom, a hydroxy group or a lower alkoxy group, with subsequent coupling with the above coupling component and transformation into the metal complex compounds by an agent donating copper, cobalt or chromium, optionally in the presence of an oxidant. The coupling components can be prepared by reacting the corresponding aminonaphthol mono- or disulfonic acids with a dihalide or anhydride of succinic acid, glutaric acid or adipic acid. The metal complex compounds have outstanding dyestuff properties. They have a good solubility in water and are especially suitable for dyeing fiber materials of natural and regenerated cellulose, of natural, regenerated or synthetic polyamides of polyurethanes as well as leather. The dyeings display very good fastness to light and to wet processing, a high color strength and portions of the dyestuff which have not been fixed on the fiber can be washed off easily.