Ciba-geigy Corporation

Ciba-geigy Ag

Fabio Beffa

Gerhard Back

Eginhard Steiner

Hans U Schutz

Alois Puntener

Paul Lienhard

Arthur Buhler

Ulrich Schlesinger

Peter Loew

Alfred Fasciati

Josef Koller

Hans Ackermann

Otto Bitterlin

Peter Donath

Hans-Ulrich Schutz

Hans-Ulrich Sch/u/ Tz

Charles Soiron

Asymmetric 1:2-chrome complex dyes of the formula: ##STR1## wherein A is the radical of 1-hydroxynaphthalene or 2-hydroxynaphthalene,

Asymmetric 1:2-chrome complexes of

Dyes which are 1:2-chromium complexes, containing one azo dye or azomethine dye and one disazo dye or trisazo dye. The dyes are suitable for dyeing wool, synthetic polyamides and leather.

Asymmetrical polyazo chromium complex dyes comprising resorcinol as a

A mixture comprising a yellow dye and a red dye each of formula I and a grey dye of formula II is employed in accordance with claim 1 for the trichromatic dyeing of leather.

Process for the trichromatic dyeing of leather

A process of dyeing polyamide-containing material is disclosed using dyes of the following formula: ##STR1## wherein Me is cobalt or chromium,

1:2 chromium or cobalt metal complex dyes and use thereof for dyeing

Disclosed are chrome complex dyes of the formula ##STR1## and of the formula ##STR2## wherein Z and Z' independently of one another are each nitrogen or --CH--;

Bis 1:2 chromium complexes of disazo and azo or azomethine dyes

1:2 chromium complex dyes suitable for dyeing nitrogen-containing materials and materials which contain hydroxyl groups, are disclosed which, in the form of the free acid, have the formula ##STR1## wherein each of the symbols independently has the following meanings: Z is nitrogen or a --CH,

Chrome azo-azomethine dyes are disclosed which contain a benzthiazolylphenyl or stilbenyl radical bound via an aldehyde group to the aldehyde moiety of the azomethine dyes. The dyes are particularly useful for dyeing wool, polyamide and leather.

Chrome azo and/or azomethine dyes containing a benzthiazolylphenyl or

The present invention relates to novel chromium complex dyes of the formula ##STR1## wherein Z is hydrogen, chloro, bromo, nitro, lower alkyl or acylamino;

8-hydroxyquinoline sulfonic acid-azo chromium complexes

The novel asymmetric 1:2 chrome complex dyes of the formula I given in claim 1 are suitable in particular for dyeing wool or polyamide and especially leather.

Asymmetric 1:2 chrome complex dyes containing an azo and an azomethine

The dyes of the formula I ##STR1## in which Me is cobalt or chromium, A and A' independently of each other are each the radical of an amine of the benzene series which carries the hydroxyl group in the o-position relative to the azomethine group, Ar.sub.1 and Ar.sub.3 independently of each other are each a substituted or unsubstituted phenylene or naphthylene radical, Ar.sub.2 and Ar.sub.4 independently of each other are each a substituted or unsubstituted benzene or naphthalene radical, m and n independently of each other are each 0 or 1, p is an integer from 3 to 6 and Ka.sym. is a cation, are suitable for dyeing polyamides, particularly wool and leather.

1:2 Metal complexes of azomethine dyes having arylazo groups

Novel chromium complex dyes are disclosed which have the formula ##STR1## wherein S.sub.1 represents a hydrogen or halogen atom, a nitro group, a sulpho group, an alkyl or alkoxy radical, an acylamino or arylazo group,

Fibre-reactive chromium complex dyes, process for their manufacture and

Metallizable disazo dyes of the formula (1) ##STR1## in which A and A' independently of one another are each the radical of a diazo component of the benzene or naphthalene series, at least one of the groups A or A' carrying a metallizable hydroxyl or carboxyl group in the o-position relative to the azo group, and X is substituted or unsubstituted phenylene, naphthylene or C.sub.2 -C.sub.4 -alkylene and R is C.sub.1 -C.sub.4 -alkyl, COO-Q or CONQQ.sub.1, in which Q and Q.sub.1 are each hydrogen or C.sub.1 -C.sub.4 -alkyl. In the form of their cobalt or chromium complexes, the dyes are suitable for dyeing natural or synthetic polyamide materials, and especially wool or leather.

Metal complexes of disazo dyes

Chromium complex dyes are disclosed which have the formula ##STR1## wherein S.sub.1 represents a hydrogen or halogen atom, a nitro group, a sulpho group, an alkyl or alkoxy radical, an acylamino or arylazo group,

Sulfo-substituted fibre-reactive 1:2-chromium complex azo dyes

1:2 Metal complex dyes of formula I ##STR1## and mixtures thereof with the metal complex dyes of formulae II and III ##STR2## wherein Me is chromium or cobalt and Q.sup..sym. is a cation. The dyes and dye mixtures are suitable for dyeing and printing natural or synthetic polyamide material. Printing pastes and padding liquors prepared from these dyes or mixtures have no tendency to gel.

1:2 Chromium and cobalt complex dyes

Red monoazo dyestuffs frm diazotised 1-aminobenzene-2-sulphonic acid-N-methyl-N-cyclohexylamide or 1-amino-4-,-5- or -6-methyl-benzene-2-sulphonic acid-N-methyl-N-cyclohexylamide and 2-amino-8-hydroxynaphthalene-6-sulphonic acid are disclosed which are particularly distinguished by their good migration and levelling properties and excellent fastness to light. Said dyestuffs are moreover suitable for obtaining very even combination dyeings together with known blue or yellow acid dyestuffs. These dyestuffs are particularly suited for the dyeing of carpeting, upholstery fabrics and drapery materials.

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Riehen, Switzerland

Fabio Beffa