Disazo and trisazo dyes having a 1,3-diamino-, dihydroxy- or amino-hydroxy-benzene nucleus and metal complexes thereof
AssigneeSandoz Ltd.
InventorHeinz Wicki
Life of this patent
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Abstract
Compounds of the formula ##STR1## in which R.sub.1 is hydrogen or nitro, Each of R.sub.2 and R.sub.3, independently, is --OH or --NH.sub.2, R.sub.4 is hydrogen, nitro or (C.sub.1-4) alkyl, R.sub.5 is hydrogen, nitro or (C.sub.1-4) alkoxy, R.sub.6 is hydrogen, (C.sub.1-4) alkyl, (C.sub.1-4) alkoxy, --COOM or --SO.sub.3 M, R.sub.7 is hydrogen or --SO.sub.3 M, R.sub.8 is hydrogen or the radical of a diazo component, and M is a hydrogen ion or a non-chromophoric cation, And mixtures thereof, in metallized form or unmetallized form, which compounds in metallized form are useful as dyes for paper and leather. The dyeings exhibit notable fastness to light, hard water, washing, perspiration, alkali, acid and buffing.
Claims43
A 1:1 copper, 1:1 nickel, 1:2 chromium, 1:2 cobalt or 1:2 iron complex of a comound of the formula ##STR68## or a mixture of such complexes, wherein R.sub.1 is hydrogen or nitro,
- R.sub.2 is hydroxy or --NH.sub.2,
- R.sub.3 is hydroxy or --NH.sub.2,
- R.sub.4 is hydrogen, nitro or C.sub.1-4 alkyl,
- R.sub.5 is hydrogen, nitro or C.sub.1-4 alkoxy,
- R.sub.6 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, --COOM or --SO.sub.3 M,
- R.sub.7 is hydrogen or --SO.sub.3 M,
- R.sub.9 is hydrogen, hydroxy, --NH.sub.2, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,
- R.sub.10 is hydrogen, nitro, --COOM or --SO.sub.3 M,
- R.sub.11 is hydrogen, fluoro, chloro, bromo, iodo, nitro or C.sub.1-4 alkyl, and
- each M is hydrogen or a non-chromophoric cation,
- wherein each 1:2 chromium, 1:2 cobalt and 1:2 iron complex has an additional M balancing the negative charge of the complexed metal atom.
Dependencies are inferred from the claim text.