Azo dyes, processes for their preparation and their use

Details Azo dyes, processes for their preparation and their use Azo dyes, processes for their preparation and their use

C - Chemistry, Metallurgy

09

B

C09B 31/047 (2006.01) C09B 43/128 (2006.01) D06P 1/06 (2006.01)

Patent

CA 2181663

Azo dyes of the formula Image (1), in which R1 and R2 independently of one another are unsubstituted or hydroxy-, C1-C4-alkoxy- or halogen-substituted C1-C4-alkyl or C1-C4-alkoxy; unsubstituted or C1-C4-alkyl-, C1-C4-alkoxy- or halogen-substituted phenyl or phenoxy; or a radical of the formula -N(R3)R4, in which R3 und R4 independently of one another are hydrogen, C1-C4-alkyl, or C2-C4-alkanoyl which is unsubstituted or further substituted in the alkyl part by hydroxyl or C1-C4-alkoxy, with the proviso that R1 and R2 are not simultaneously methyl, produce dyeings with good fastnesses on fibre materials containing nitrogen or containing hydroxyl groups.

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