Hoechst Aktiengesellschaft

Hoechstaktiengesellschaft

Marcos Segal

Michael Kunze

Werner H Russ

Hartmut Springer

Manfred Hahnke

Konrad Opitz

Uwe Mrotzeck

Jutta Reiter

Christine Feuchtner

The invention relates to dye compositions for obtaining level dyeings on carboxamido-containing and hydroxyl-containing fiber materials, which dyeings have comparably good light and wetlightfastness properties, the dye compositions containing dioxazine dyes (I) and disazo dyes (II) (one or more than one from IIa to IIf) in a weight ratio of 90:10 to 10:90, preferably 60:40 to 10:90, in particular 40:60 to 15:85.

Dye composition containing a mixture of water-soluble fiber-reactive

A process for the preparation of a pH-stabilized, liquid, aqueous dyestuff composition of the lithium azo dyestuff of formula (1) ##STR1## which composition has an Na-content of less than 0.2% b.w., based on the lithium azo compound of formula (1), in which process the lithium salt of 4-(.beta.-sulfatoethylsulfonyl)-aniline is diazotized in a mineral acid aqueous solution or in a mineral acidic solution containing a watermiscible organic solvent by means of an essentially sodium-free derivative of nitrous acid as the diazotizing agent, such as nitrosyl sulfuric acid, and the diazotized aniline is coupled in said solution with the lithium salt of 1-hydroxy-7-acetylamino-naphthalene-3-sulfonic acid and a buffering substance for adjusting and maintaining the pH of the composition at a value between 3 and 6.5 is added to that solution subsequent to the above-mentioned diazotizing step or preferably during said or subsequent to said coupling step, the amount of the buffering substance added is from 0.5 to 5% b.w. of said composition,

Process for preparing a stabilized composition of a lithium azo compound

A process for the preparation of the lithium azo compound of the formula ##STR1## having an Na content of less than 0.2% by weight, in particular less than 0.1% by weight, in which the lithium salt of 4-(.beta.-sulfatoethylsulfonyl)-aniline is diazotized in an aqueous solution or in an aqueous solution containing a water-miscible organic solvent by means of nitrosylsulfuric acid, and the product is coupled with the lithium salt of 1-hydroxy-7-acetylaminonaphthalene-3-sulfonic acid.

Process for the preparation of the lithium salt of a fiber-reactive azo

Water-soluble azo compounds having fiber-reactive dye properties conforming to the formula ##STR1## in which D denotes a benzene or naphthalene ring;

Phenylazonaphthol or naphthylazonaphthol compounds containing a

Water-soluble monoazo compounds containing a fiber-reactive group of the

Water-soluble Azo compounds containing fiber-reactive groups and having

Water soluble azo compounds having fiber-reactive dye properties conforming to the formula ##STR1## in which D denotes a benzene or naphthalene ring;

Water-soluble azo compounds containing fiber-reactive groups and having

Water-soluble monoazo and disazo compounds having fiber-reactive dye properties which are suitable for dyeing carbamoyl- and hydroxyl-containing materials, in particular cellulose fiber materials, and containing as diazo components an optionally substituted phenyl radical or naphthyl radical or a phenylazophenyl, phenylazonaphthyl, naphthylazophenyl or naphthylazonaphthyl radical, one of these radicals containing bonded in the diazo component a vinylsulfonyl, .beta.-thiosulfatoethylsulfonyl, .beta.-phosphatoethylsulfonyl, .beta.-chloroethylsulfonyl or .beta.-sulfatoethylsulfonyl group, and as coupling component that of a naphthol, aminonaphthaline or aminobenzene having a fiber-reactive grouping of the general formula ##STR1## in which the two R.sup.1 s, identical to or different from each other, denote a hydrogen atom or an optionally substituted alkyl group of 1 to 4 carbon atoms, R is a hydrogen atom or a sulfo group and Y represents the vinyl group, a .beta.-thiosulfatoethyl, .beta.-phosphatoethyl, .beta.-chloroethyl or .beta.-sulfatoethyl group.

Water-soluble azo compounds containing, as fiber-reactive groups, a

Water-soluble monoazo and disazo compounds which have fiber-reactive dyestuff properties and containing as diazo component an optionally substituted phenyl radical or naphthyl radical or an optionally substituted phenylazophenyl, phenylazonaphthyl, naphthylazophenyl or naphthylazonaphthyl radical, and as coupling component that of a naphthol, aminonaphthaline or aminobenzene and as fiber-reactive group a group of the formula ##STR1## in which both R.sup.1 s, identical to or different from one another, denote a hydrogen atom or an optionally substituted alkyl group of 1 to 4 carbon atoms, R is a hydrogen atom or a sulfo group and Y represents a vinyl group or a .beta.-thiosulfatoethyl, .beta.-phosphatoethyl, .beta.-chloroethyl or .beta.-sulfatoethyl group, this fiber-reactive grouping being bonded to the radical of the coupling component. These azo compounds have fibre-reactive dyestuff properties and are suitable for dyeing carboxamide and/or hydroxy-containing materials, such as wool and synthetic polyamide fibers, in particular cellulose fibres, in deep and fast shades, when applied according to the usual methods of application and fixation, suitable for fibre-reactive dyestuffs.

Water soluble monoazo and disazo compounds containing

The invention relates to dye compositions for preparing level dyeings on carboxamide- or hydroxyl-containing fiber materials of comparatively good light fastness properties, which contain dioxazine dyes I (Ia and/or Ib) and II (one or more of IIa to IId) in a weight ratio of 90:10 to 10:90 ##STR1## where in each case independently of one another Z denotes vinyl or .beta.-sulfatoethyl,

Mixtures of water-soluble fiber-reactive dyes and use thereof for

Monoazo compounds which are suitable as fiber-reactive dyestuffs have the general formula (1) ##STR1## in which: D is a benzene or naphthalene ring or a radical of the formula (2) or (3) ##STR2## R.sup.1 is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, hydroxy, nitro or halogen, if D stands for a benzene ring, and

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Suzano, Brazil

Marcos Segal