| 摘要 |
The dyestuffs are free of carboxylic acid and sulphonic acid groups and correspond to the formula (I) <IMAGE> in which R, R<1>, Y, A, K<(+)> and X<(-)> have the meaning given in Claim 1. They are prepared by diazotising an aromatic amine of the formula (II) <IMAGE> and coupling the resulting diazonium salt with a pyridone of the formula (III) <IMAGE> or coupling it with an acylacetic acid ester and then reacting the coupling product in the presence of a catalyst and of a solvent with a salt of an acetamide containing a cationic group. The dyestuffs can be used for dyeing or printing synthetic polymer materials in the form of tapes, strips, fibres, foils, threads and textile materials generally and are particularly suitable for dyeing or printing polymers and copolymers of acrylonitrile and of dicyanoethylene and also of acid-modified polyesters and polyamides. |
