Mixtures of dyestuffs
AssigneeBayer Aktiengesellschaft
InventorKlaus Leverenz
Life of this patent
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Abstract
Dyestuff mixtures of at least two different dyestuffs of the general formula ##SPC1## In which X = cn, no.sub.2 or alkylsulphonyl Y = hydrogen, methyl, ethoxy or methoxy R.sub.1 = hydrogen or alkyl R.sub.2 = c.sub.1 -c.sub.4 -alkyl or an optionally substituted phenyl radical or phenylalkyl radical Ac = acyl. Using these mixtures for dyeing of polyester fibres deep clear blue dyeings with good general fastness properties are obtained.
Claims4
Dyestuff mixtures of at least two different dyestuffs in which each dyestuff is present in at least 5% by weight of the mixture, said dyestuffs having the formula ##SPC17##
- wherein
- X' represents CN, NO.sub.2, SO.sub.2 CH.sub.3 or SO.sub.2 CH.sub.2 CH.sub.3,
- Ac' represents ##EQU2## R.sub.1 ' represents a C.sub.2 -C.sub.4 -alkyl radical, R.sub.2 ' represents a C.sub.1 -C.sub.4 -alkyl radical or the ##SPC18##
- group and
- n represents 0, 1 or 2
- and the components of the mixture differ in at least one of the substituents R.sub.1 ' or R.sub.2 '.
Dyestuff mixtures of at least two different dyestuffs in which each dyestuff is present in at least 5% by weight of the mixture, said dyestuffs having the formula ##SPC21##
- wherein
- V denotes a C.sub.1 -C.sub.4 -alkyl radical,
- W denotes a C.sub.1 -C.sub.4 -alkyl radical or a phenyl radical R.sub.1 ' denotes a C.sub.2 -C.sub.4 -alkyl radical, R.sub.2 ' denotes a C.sub.1 -C.sub.4 -alkyl radical or the ##SPC22##
- group and n denotes 0, 1 or 2 and the components of the mixture differ in at least one of the substituents R.sub.1 ' or R.sub.2 '.
Dependencies are inferred from the claim text.