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US 6,551,363 B1Granted
Azo dye mixtures
AssigneeCiba Specialty Chemicals Corporation
InventorsAntoine Clément, Alfons Arquint, Urs Lauk
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Abstract
The present invention relates to a dye mixture comprising as component (A) at least one dye of formula as component (B) at least one dye of formula wherein the substituents R1, R2, R3 and R4 are as defined in claim 1, and to the use of that mixture in the dyeing or printing of semi-synthetic or synthetic hydrophobic fiber materials.
Claims7
A dye mixture comprising
- as component (A) at least one dye of formula
- and
- as component (B) at least one dye of formula
- wherein
- R1 is C1-C6alkyl unsubstituted or substituted by hydroxy, cyano, phenyl, acyloxy or
- it being possible for the alkyl chain from C3 to be interrupted one or more times by oxygen, or is allyl,
- R2 is C1-C4alkyl substituted by C1-C4alkoxycarbonyl, or is n-hexyl,
- R3 is C1-C4alkyl, and
- R4 is hydrogen, halogen, C1-C4alkyl or C1-C4alkoxy.
6 more elements
Dependencies are inferred from the claim text.