Disperse Azo Dyes
AssigneeHuntsman International LLC
InventorsUrs Lauk, Patric Nowack, Romeo Dreier
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Abstract
The present invention relates to disperse azo dyes of formula wherein R1 is bromo, nitro, cyano, methyl, methoxy or trifluoromethyl; R2 is hydrogen, chloro, bromo or trifluoromethyl; R3 is hydrogen, chloro, bromo, methoxy, trifluoromethyl, nitro or cyano; and R4 is methyl, ethyl, n-propyl, 2-methoxyethyl, methoxycarbonylmethyl or 2-methoxycarbonylethyl; with the proviso that R1 is cyano in case R2 denotes chloro or bromo, to a process for the preparation of such dyes and to their use in the dyeing or printing of semi-synthetic and, especially, synthetic hydrophobic fibre materials, more especially textile materials.
Claims10
A dye of formula
- wherein
- R1 is bromo, nitro, cyano, methyl, methoxy or trifluoromethyl;
- R2 is hydrogen, chloro, bromo or trifluoromethyl;
- R3 is hydrogen, chloro, bromo, methoxy, trifluoromethyl, nitro or cyano;
- and
- R4 is methyl, ethyl, n-propyl, 2-methoxyethyl, methoxycarbonylmethyl or 2-methoxycarbonylethyl;
- with the proviso that R1 is cyano when R2 is chloro or bromo, and R1 is cyano or nitro when R2 is trifluoromethyl.
Dependencies are inferred from the claim text.