| abstract |
A mixture of dyes containing at least one dye of formula (I) ** (See formula) ** in which R1 is hydrogen, (C1-C6) alkyl, (C1-C4) alkoxy, hydroxyl, halogen, -NHCHO, -NHCO (C1-C6) alkyl, -NHCO-aryl, -NHSO2-(C1-C6) alkyl or -NHSO2-aryl, R2 is hydrogen, halogen, (C1-C4) alkoxy, (C1-C4) alkyl or aryloxy, R3 is hydrogen, (C1-C6) alkyl, substituted (C1-C6) alkyl, (C3-C4) alkenyl or substituted (C3-C4) alkenyl, especially benzyl, butyl, 2-cyanoethyl or a moiety of formula -CHR4- CnH2n-CHR6-COO-CHR7-CO-R5, or R2 and R3 combine to form the remainder -C * H (CH3) CH2C (CH3) 2-, in which the carbon atom marked with an * is attached to the nucleus of phenyl, R4 is hydrogen, (C1-C6) alkyl or phenyl, R5 is (C1-C6) alkyl or substituted (C1-C6) alkyl, R6 is hydrogen or (C1-C6) alkyl, R7 is hydrogen, alkyl ( C1-C6) or phenyl, and n is 0, 1, 2 or 3, and at least one dye of formula (II) ** (See formula) ** ... |