| abstract |
The present invention relates to new cationic azomethine direct dyes of formula (I) and their leucos forms of formula (II) as well as their use for dyeing keratin fibres, in particular human keratin fibers such as the hair: Formula (I ) or (II) in which X1, X2, R1, R2, R3, R4, R5, R6, n, and n' are as defined in the description The compounds of formula (I) according to the invention make it possible to lead to powerful, chromatic, not very selective colorations, with a good rise in color and which are resistant to the various attacks that keratin fibers can undergo such as bad weather, light, washing and perspiration. |