A coupler of the structure 7 amino - 1,2,3,4 - tetrahydroquinolines cationic dye composition comprising, and uses.

摘要

The present invention relates to the use of special couplers, heterocyclic derivatives of 7 - amino - 1,2,3,4 - tetrahydroquinoline cationic of formula (i) for dyeing keratin fibers such as the hair: formula (i) in which: r to r, cat, -, and r to r are as defined in the description.