Basf Aktiengesellschaft

Helmut Junge

Walter Kurtz

Peter Dimroth

Peter Tonne

Hans-Juergen Quadbeck-Seeger

Werner Jettmar

Hans Scherer

Hans Olschner

Rolf Urtel

The abrasiveness of a pigment or printing ink is reduced by incorporation of one or more finely divided substances which are insoluble in printing inks and have a Mohs hardness of from 4.5 to 8, suitable compounds being iron powder, compounds of iron, zirconium, silicon and magnesium, aluminum silicates, oxides of manganese, tin and cerium, or mixtures of these. The printing inks obtained cause substantially less, or virtually no, abrasion of gravure printing cylinders.

Less abrasive pigment or printing ink, and method of reducing abrasion

Compounds of the formula ##STR1## in which K is ##STR2## Ar.sup.1 is phenyl; phenyl substituted by chlorine, methoxy, ethoxy, methyl, acetylamino or benzoylamino; or ##STR3## Ar.sup.2 is phenyl; or phenyl substituted by chlorine, methyl or sulfamoyl,

Azo dyes from an oxadiazolyl-substituted aniline

Compounds of the formula ##STR1## in which K is the radical of a coupling component;

Azo dyes

An azo pigment of the formula: ##STR1## in which R is hydrogen or methyl;

Heterocyclic azo pigments

Dyes of the formula: ##STR1## in which D is the radical of a diazo component;

Azo pigment or dye having a naphthyl-quinazalone coupling component

A monoazo dye or pigment of the formula: ##STR1## in which D is the radical of the diazo component, preferably a diazotized compound of the aminoanthraquinone, aminophthalimide or aniline series;

Monoazo dye having a .beta.-hydroxynaphthoic acid amide coupling

The production of dichlorobenzoic acids by reaction of the diazonium compound of a dichloroaminobenzoic acid with an aqueous alcohol solution of specific concentration. The compounds which can be prepared according to the process of the invention are valuable starting materials for the production of pharmaceutical substances, dyes and pesticides.

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Wachenheim, Germany

Helmut Junge