AZO DYES

The present invention relates to new azo dyes of the general formula (1), a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades. More specifically, the invention provides compounds that contain azo groups which are linked b...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HUBBE, THOMAS, MEIER, HELMUT-MARTIN, STRUMPF, KLAUS-GUNTER, HEIDE, CHRISTOF
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMISTRY DYES IMPREGNATING OR COATING OF PAPER LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING POLISHES PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	The present invention relates to new azo dyes of the general formula (1), a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades. More specifically, the invention provides compounds that contain azo groups which are linked by aromatic structures, such as substituted benzene and/or naphthalene groups. The dyes of the invention provide paper with higher lightfastness than paper produced with known dye mixtures. (See Formula 1) La présente invention concerne de nouveaux colorants azoïques, leur procédé de préparation et leur utilisation pour la coloration ou l'impression de matières fibreuses, pour produire des matières ayant des teintes brunâtres.