| abstract |
Water-insoluble azo colorant based on N-acetoacetyldehydrothiotoluidine Compound of the formula (I) (see fig. I) in which R1 and R2 independently of one another are a hydrogen atom, C1-C4-alkyl, C5-C6-cycloalkyl, a benzyl group, an unsubstituted phenyl group or a substituted phenyl group with 1 to 5, preferably 1 to 3, substituents from the group consisting of C1-C4-alkyl, C1-C4-alkoxy, halogen, nitro, cyano, hydroxyl, CF3, CONH2, CONH(C5-C6-cycloalkyl), CON(C1-C4-alkyl)2, CONH(C1-C4-alkyl), COO(C1-C4-alkyl), COO(C5-C6-cycloalkyl) and CONH(phenyl), R3 is a hydrogen atom, C1-C4-alkyl, C1-C4-alkoxy, halogen, nitro, cyano, hydroxyl, CF3, COO(C1-C4-alkyl) or COO(C5-C6-cycloalkyl) and n is 1 or 2. |