METAL COMPLEX DYESTUFFS

METAL COMPLEX DYESTUFFS

Dyestuffs comprising 2:1 chromium complexes from mixtures of azo dyestuffs which in the free acid form are represented by formula (1): there being 60-95 mol% of the azo dyestuff wherein R is H and 40-5 mol% of the azo dyestuff wherein R is SO3H. These dyestuffs are good black colours for wool and ny...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: RIDYARD, DENIS ROBERT ANNESLEY
Format: Patent
Sprache:eng
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:Dyestuffs comprising 2:1 chromium complexes from mixtures of azo dyestuffs which in the free acid form are represented by formula (1): there being 60-95 mol% of the azo dyestuff wherein R is H and 40-5 mol% of the azo dyestuff wherein R is SO3H. These dyestuffs are good black colours for wool and nylon and may be obtained in the form of concentrated aqueous solutions. Their properties are better than could be expected from the aggregate of properties of the metal complex dyestuffs from individual azo dyestuffs of formula (1).