The present invention relates to azomethine-type direct dyes having a triaromatic unit of formula (I) below: and also the use thereof for dyeing keratin fibres, in particular human keratin fibres such as the hair. The invention also relates to a composition for dyeing keratin fibres, comprising, in a medium suitable for dyeing, such direct dyes. Another subject of the present invention is a method for dyeing keratin fibres using said dye composition. Finally, the present invention also relates to precursors of these direct dyes.
本发明涉及具有下式(I)的三芳基单元的
偶氮甲烷型
直接染料,以及它们用于染色角蛋白纤维,特别是人类角蛋白纤维(如头发)的使用。本发明还涉及一种用于染色角蛋白纤维的组合物,该组合物包括适用于染色的介质中的上述
直接染料。本发明的另一个主题是使用所述
染料组合物染色角蛋白纤维的方法。最后,本发明还涉及这些
直接染料的前体。