Azo dyes, process for their preparation and their use for dyeing or printing natural or synthetic materials
AssigneeCiba Specialty Chemicals Corporation
InventorsJean-Pierre Bacher, Jean-Marie Adam
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Abstract
This invention relates to dyes of formula wherein R1 is hydrogen, halogen, C1-C8alkyl, —NH—CO—C1-C4alkyl or phenyl, R2 is hydrogen, halogen, C1-C8alkyl, C1-C8alkoxy, —NH—CO—C1-C4alkyl or phenyl, R3 is hydrogen, C1-C8alkyl or phenyl, R4 is hydrogen, halogen or C1-C8alkyl, and X is —CO—, — COO—or —SO2—, and n is the number 1 or 2, to their preparation and to their use for dyeing or printing natural and synthetic materials, in particular synthetic polyamide fibre materials.
Claims7
A dye of formula
- wherein
- R1 is hydrogen, halogen, C1-C8alkyl, —NH—CO—C1-C4alkyl or phenyl,
- R2 is hydrogen, halogen, C1-C8alkyl, C1-C8alkoxy, —NH—CO—C1-C4alkyl or phenyl,
- R3 is hydrogen, C1-C8alkyl or phenyl,
- R4 is hydrogen, halogen or C1-C8alkyl, and
- X is —CO—, —COO— or —SO2—, and
- n is the number 1 or 2,
- or
- of formula
- wherein
- R1, R2, R3, R4 and X are as defined above and —NH—X—R3 is bound in the para-position to the azo bridge.
A concentrated aqueous dye solution, which comprises 5 to 50% by weight, based on the total weight of the solution, of a dye of formula
- wherein
- R1 is hydrogen, halogen, C1-C8alkyl, —NH—CO—C1-C4alkyl or phenyl,
- R2 is hydrogen, halogen, C1-C8alkyl, C1-C8alkoxy, —NH—CO—C1-C4alkyl or phenyl,
- R3 is hydrogen, C1-C8alkyl or phenyl,
- R4 is hydrogen, halogen or C1-C8alkyl, and
- X is —CO—, —COO— or —SO2—, and
- n is the number 1 or 2.
A process for dyeing or printing hydroxyl group-containing or nitrogen-containing fibre materials, which comprises applying thereto one or more than one dye of formula
- wherein
- R1 is hydrogen, halogen, C1-C8alkyl, —NH—CO—C1-C4alkyl or phenyl,
- R2 is hydrogen, halogen, C1-C8alkyl, C1-C8alkoxy, —NH—CO—C1-C4alkyl or phenyl,
- R3 is hydrogen, C1-C8alkyl or phenyl,
- R4 is hydrogen, halogen or C1-C8alkyl, and
- X is —CO—, —COO— or —SO2—, and
- n is the number 1 or 2.
Dependencies are inferred from the claim text.