Basf Aktiengesellschaft

Gunter-Rudolf Schroeder

Udo Mayer

Helmut Reichelt

Ingo Klopp

Gero Nordmann

Juergen Decker

Erwin Hahn

Rainer Dyllick-Brenzinger

Hartwig Voss

Karin H Beck

Armin Diefenbacher

Walter Breitschaft

Christoph Bomba

A process for producing a liquid formulation of salts of sulfonated azo dyes by coupling an at least equimolar amount of diazotized aminoarylsulfonic acids IHN&#x2014;Ar&#x2014;SOH&#x2003;&#x2003;(I),where Ar is phenylene (which may be monosubstituted by sulfo) or naphthylene (which may be mono- or disubstituted by sulfo and/or monosubstituted by hydroxyl) onto the coupling product of an unsubstituted or methyl-substituted phenylenediamine with itself comprises dissolving the azo dye in a basic medium and then subjecting the solution to a nanofiltration.

Method for producing a liquid formulation of salts of sulphonic-acid azo dyes

The present invention relates to aqueous liquid formulations comprising

Liquid formulations of direct dyes

The present invention relates to an aqueous liquid formulation comprising based on the total weight of the aqueous liquid formulation.

Benzimidazoles of the formula ##STR1## where n and q independently of one another are each 1 or 2, R.sup.1 is hydrogen, chlorine or methyl, R.sup.2 is hydrogen, unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, halogen, nitro or C.sub.1 -C.sub.4 -alkanoyl, L is C.sub.2 -C.sub.6 -alkylene and An.sup.$ is one equivalent of an anion, are used as charge stabilizers in electrostatic toners.

Benzimidazoles and their use as charger stabilizers

Benzimidazoles of the formula ##STR1## where n and q are each 1 or 2, the radicals R are each hydrogen, chlorine or methyl, L is a bridge member and An.sup..crclbar. is one equivalent of an anion, are used as charge stabilizers in electrostatic toners.

Double benzimidazoles

Electrostatic toner containing a keto compound as a charge stabilizer

Disazo dyes suitable for preparing inks have the formula ##STR1## where m is 1 or 2,

Disazo dyes with hydroxysulfonylnaphthalene coupling components

Triphenylmethane dyes of the formula ##STR1## where each R.sup.1 is independently of the others hydrogen or substituted or unsubstituted C.sub.1 -C.sub.6 -alkyl, or two R.sup.1 radicals together with the nitrogen atom joining them form a heterocyclic radical,

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Heidelberg, Germany

Gunter-Rudolf Schroeder