| abstract |
The new dyes conform to the formula I, wherein the substituents D, X, R1, R2 and R3 are each as defined in Claim 1. The new dyes are suitable in particular for dyeing and printing hydrophobic synthetic materials in high colour strength with excellent fastness properties. They are prepared by diazotising amines of the formula D-NH2 which are free of ionic groups and coupling with 3-cyano-6-hydroxy-2-pyridones of the formula III, which are likewise new compounds. <IMAGE> |