Disperse dyes

Details Disperse dyes Disperse dyes

C - Chemistry, Metallurgy

09

B

260/176, 8/31, 8

C09B 43/00 (2006.01) C09B 29/08 (2006.01) C09B 43/128 (2006.01) C09B 57/02 (2006.01) D06P 1/04 (2006.01) D06P 1/18 (2006.01)

Patent

CA 1063602

ABSTRACT OF THE DISCLOSURE Novel azo dyes having the general formula (I): Image (I) where A is the residue of a diazotizable base or a coupling base incorporating a N-dialkylamine group, X is =NH or =O, R, and R2 are hydrogen, methyl, oxymethyl or chlorine and R3 and R4 are methyl or ethyl, are prepared from novel intermediate cyanacetanilide compounds by reaction with the corresponding p-N-alkylamino-salicyl-aldehyde. They are useful especially for dyeing synthetic hydrophobic fibres such as polyesters.

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