| 摘要 |
To prepare aqueous dye solutions containing at least 10% of a dye of the general formula <IMAGE> in which A is an aromatic radical free of anionic groups, Q is a direct bond or a bridging member, X is a radical of the formula COCH3, CN, COOCH3, COOC2H5, CONH2, COC6H5, Y and Z, independently of one another, are a divalent bridging member or a direct bond, R1 and R2, independently of one another, are hydrogen or a non-ionic substituent, R3 and R4, independently of one another, are hydrogen, C1-C4-alkyl or hydroxy-C2-C4-alkyl, R5 to R8, independently of one another, are hydrogen, C1-C4-alkyl or C2-C4-alkyl substituted by hydroxyl or <(+)>NH3xAn<(-)>, phenyl or benzyl, or R5 and R6 and/or R7 and R8 each together with the nitrogen form a five- or six-membered heterocycle or Y, R3 and R5 and/or Z, R4 and R6 together with the corresponding nitrogen atom form a piperazine ring, and An<(-)> is an anion, without isolating the intermediate, one mol of an amine of the general formula <IMAGE> is diazotised in a mixture with water and organic acids, if appropriate with the addition of mineral acids providing the anion An<(-)>, and the product is coupled with one mol of a coupling component of the general formula X-CH2-CO-NH-A (III> at a pH of </= 5.
|
