Ciba-Geigy Corporation

Willy Stingelin

Peter Loew

Jean-Marie Adam

Adolf K Aser

Roland Ronco

Ernst Hanggi

Disazo dyes are disclosed which are particularly suitable for dyeing paper. Paper is dyed with these dyes in greenish-yellow or yellow to red shades of good fastness properties.

Disazo dyes consisting of two monoazo dyes contaning a 1-phenyl-5-amino

The novel azo dyes of formula I as indicated in claim 1 are suitable for dyeing and printing, especially paper of all kinds.

Cationic azo dyes

Concentrated dye solutions of dyes of the formula (1) shown in claim are described. The dye solutions are distinguished by a good storage stability and are suitable, in particular, for dyeing paper.

Concentrated acid dye solutions: storage stable aqueous dye concentrate

The invention relates to novel cationic compounds of formula ##STR1## wherein Z is a radical of formula ##STR2## B and B.sup.1 are each independently of the other a radical Z, a cationic radical different from Z or a radical of formula ##STR3## R.sup.1 is unsubstituted C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.4 -alkenyl,

Cationic compounds

Disazo dyes which are suitable for dyeing and printing, especially of paper of all kinds. The dyes correspond to the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each an alkyl radical,

Disazo containing diaminostilbene as diazo component and an aniline

Disazo dyes which are useful for dyeing and printing, of the formula ##STR1## in which: D is the radical of a substituted or unsubstituted, homocyclic or heterocyclic diazo component, V.sup.1 and V.sup.2 independently of one another are hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, halogen or cyano, X is hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, halogen, cyano or a group of the formula --NH--CHO, --NH--CO--NH.sub.2, --NH--CO--NH--Q or --NH--CO--(0).sub.m --Q in which m is zero or 1 and Q is substituted or unsubstituted C.sub.1 -C.sub.4 alkyl or phenyl, Z is C.sub.1 -C.sub.4 alkyl--CO--, --CN, --COO--C.sub.1 -C.sub.4 alkyl, --CONH.sub.2 or --CO--C.sub.6 H.sub.5, R.sup.1, R.sup.2 and R.sup.3 independently of one another are in each case a substituted or unsubstituted alkyl radical or R.sup.1 and R.sup.2, together with the nitrogen atom linking them, or R.sup.1, R.sup.2 and R.sup.3, together with the nitrogen atom linking them, are a heterocyclic radical, A is an alkylene radical having 2 to 6 C atoms, n is 1 or 2 and An.sup..crclbar. is an anion.

Disazo dyes containing an acetoacetabukube coupling component and a

Disazo dyes which are suitable for dyeing and printing, especially of paper of all kinds. The dyes correspond to the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each an alkyl radical, A is an alkylene radical, n is 1 or 2, V, X, Y and Z are nonionic substituents customarily in azo dyes, K is a pyrimidine coupling and An is an anion.

Disazo dyes containing a pyrimidine coupling component and a cationic

There are described novel cationic compounds of the formula ##STR1## wherein the symbols B and Z have the meanings defined in claim 1, and also processes for producing them and their use for dyeing and printing textile materials, such as polyacrylonitrile materials, leather and particularly paper, there being obtained greenish to reddish yellow dyeings which are distinguished by good general fastness properties.

A process for the preparation of 2,4,6-tris(aminophenylamino)triazines by condensing s-trichlorotriazine with 3 equivalents of a partially protected phenylenediamine and subsequently removing the protective groups, which process comprises carrying out the condensation in an anhydrous or water-containing aliphatic C.sub.2 -C.sub.4 alcohol, in the presence of an acid acceptor. 2,4,6-Tris(aminophenylamino)triazines are important intermediates in dyestuff chemistry and are used, inter alia, for synthesizing textile, leather and paper dyes as well as pigments.

Process for the preparation of 2,4,6-tris(aminophenylamino)triazines

A mixture of cationic compounds of the formulae ##STR1## is obtained by reaction of a compound of the formula ##STR2## with an aldehyde of the formula II ##STR3## in an aqueous or organic medium, in the presence of an acid, in which formulae, the symbols have the meanings defined in claim 1. The mixtures obtained are suitable in particular for the dyeing of paper, whereby neutral-yellow dyeings are obtained.

Mixture of cationic compounds for dyeing and printing textiles, leather

The novel dye salts of the formula ##STR1## wherein Z, B, X, m and n are as defined in claim 1, are suitable for dyeing polyacrylonitrile in the spinning dope. The fibres dyed according to the invention have good fastness to rubbing, steaming, washing and light.

Dye salts

There are described novel cationic compounds of the formula ##STR1## wherein Z's independently of one another are each a radical of the formula ##STR2## B is identical to Z or is a cationic radical different from Z; R's independently of one another are each hydrogen, unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, unsubstituted or substituted C.sub.1 -C.sub.4 -alkoxy, the NO.sub.2 group, unsubstituted or substituted acylamino, halogen or the CN group;

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Reinach, Switzerland

Willy Stingelin