DYES

摘要

A colorant for coloring keratin fibers wherein the colorant contains a substantive dye which is a 4-nitroaniline derivative corresponding to formula (I): in which R1, R2, R3 and R4 independently of one another represent a hydrogen atom, an alkyl, hydroxyalkyl, alkoxyalkyl, carbamyl alkyl, mesylaminoalkyl, acetylaminoalkyl, ureidoalkyl, carbalkoxyaminoalkyl, sulfalkyl, piperidinoalkyl, morpholinoalkyl or phenyl radical optionally substituted by an amino group in the para position, the alkyl or alkoxy groups containing 1 to 4 carbon atoms, with the proviso that the four substituents R1, R2, R3 and R4 do not simultaneously represent hydrogen, and the groups -NR1R2 and -NR3R4 may also represent an aziridine, acetidine, pyrrolidine, piperidine, azepan, azocine, morpholine, thiomorpholine or piperazine ring which may also bear another substituent R8 at the nitrogen atom, R8 being a hydrogen atom, a (C1-4)-alkyl, hydroxy-(C2-3)-alkyl, (C1-4)-alkoxy-(C2-3)-alkyl, amino-(C2-3)-alkyl or 2,3-dihydroxypropyl group, and R5, R6 and R7 independently of one another represent ahydrogen atom, a halogen atom, a (C1-4)-alkyl, (C1-4)-alkoxy, carboxy, sulfo or (C2-4)-hydroxyalkyl group, or a physiologically compatible salt of the compounds with an inorganic or organic acid.