VERFAHREN ZUR HERSTELLUNG EINER FLÜSSIGFORMULIERUNG VON SALZEN SULFONSAURER AZOFARBSTOFFE

VERFAHREN ZUR HERSTELLUNG EINER FLÜSSIGFORMULIERUNG VON SALZEN SULFONSAURER AZOFARBSTOFFE

A process for producing a liquid formulation of salts of sulfonated azo dyes by coupling an at least equimolar amount of diazotized aminoarylsulfonic acids I H2N-Ar-SO3H  (I), where Ar is phenylene (which may be monosubstituted by sulfo) or naphthylene (which may be mono- or disubstituted by sulfo a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DIEFENBACHER, ARMIN, REICHELT, HELMUT, SCHROEDER, GUNTER-RUDOLF, VOSS, HARTWIG, DECKER, JUERGEN, KLOPP, INGO
Format: Patent
Sprache:ger
Schlagworte:
ADHESIVES
CHEMISTRY
DYES
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
POLISHES
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Beschreibung
Zusammenfassung:A process for producing a liquid formulation of salts of sulfonated azo dyes by coupling an at least equimolar amount of diazotized aminoarylsulfonic acids I H2N-Ar-SO3H  (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.