Chromium mixed complex dyestuffs of phenyl-azo-pyrazole components
AssigneeBayer Aktiengesellschaft
InventorsWinfried Mennicke, Walter Scholl, Karl-Heinz Schundehutte
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Abstract
Unsymmetrical chromium mixed complex dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2 denote C.sub.1 -C.sub.4 -alkyl, nitrile, carbonamide or X-Z, X denotes a direct bond or a bridge member to a C atom of the rings A, B, C or D or to a 3-C atom of the pyrazoles and Z denotes SO.sub.3 H, COOH or OSO.sub.3 H and A, B, C and D can possess further substituents, are suitable for the dyeing and printing of nitrogen-containing fibrous materials in yellow shades.
Claims2
Unsymmetrical chromium mixed complex dyestuff which in the form of the free acid has the formula ##STR62## wherein SO.sub.3 H is bonded to one of the rings A, B, C or D;
- the rings A and C are phenyl or phenyl substituted by nitro, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.2 -C.sub.5 -alkyl-carbonylamino, C.sub.2 -C.sub.5 -alkylcarbonyl or carboxyl;
- and
- the rings B and D are phenyl;
- phenyl substituted by nitro, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.2 -C.sub.5 -alkylcarbonylamino, C.sub.2 -C.sub.5 -alkylcarbonyl or carboxyl;
- or naphthyl.
Dependencies are inferred from the claim text.