Patent ID: 7294152

Claim:
A process for the dyeing of keratinic fibers, comprising applying to wet or dry fibers, for a period of time sufficient for the development of color, a dyeing composition comprising as a direct dye, in a medium appropriate for the dyeing of keratin fibers, at least one compound of formula (I): wherein: R 1 , R 2 and R 3 , which may be the same or different, are chosen from linear and branched C 1 -C 24 alkyl groups, C 6 -C 30 aryl groups, and aralkyl groups wherein the aryl part is C 6 -C 30 and the linear or branched alkyl part is C 1 -C 24 ; R 4 and R 5 , which may be the same or different, are chosen from hydrogen atoms, halogen atoms, hydroxy groups, linear and branched C 1 -C 24 alkyl groups, linear and branched C 1 -C 24 alkoxy groups, monohydroxy alkoxy groups, wherein the alkyl part is linear or branched C 1 -C 6 , polyhydroxy alkoxy groups wherein the alkyl part is linear or branched C 1 -C 6 , amino groups optionally substituted with at least one group chosen from linear and branched C 1 -C 6 alkyl groups, which may be the same or different, optionally substituted with at least one hydroxyl group, thiol groups, alkylthio groups wherein the alkyl part is linear or branched C 1 -C 6 , carboxyl groups in acid or salt form, with an alkali metal or substituted or unsubstituted ammonium, alkoxycarbonyl groups wherein the alkyl part is linear or branched C 1 -C 6 , alkylamide groups wherein the alkyl part is linear or branched C 1 -C 6 , alkylcarbamyl groups wherein the alkyl part is linear or branched C 1 -C 6 , alkyl part is linear or branched C 1 -C 6 , alkylsulphonylamido groups wherein the alkyl part is linear or branched C 1 -C 6 , C 6 -C 30 aryl groups optionally substituted with at least one C 1 -C 6 alkyl group, and aralkyl groups wherein the aryl part is C 6 -C 30 , optionally substituted with at least one C 1 -C 6 alkyl group, and the linear or branched alkyl part is C 1 -C 24 , wherein the alkyl and aryl groups and/or parts, are optionally substituted with at least one entity chosen from hydroxyl groups, —SO 3 − groups, —COO − groups, halogen atoms, C 1 -C 6 alkoxy groups, monohydroxy alkoxy groups wherein the alkyl part is linear or branched C 1 -C 6 , polyhydroxy alkoxy groups wherein the alkyl part is linear or branched C 1 -C 6 , amino groups optionally substituted with at least one group chosen from linear and branched C 1 -C 6 alkyl groups, which may be the same or different, optionally substituted with at least one hydroxyl group, n and m, which may be the same or different, are integers ranging from 0 to 4, An is at least one anion that is cosmetically acceptable; and p is equal to 0 or 1, so as to respect the electroneutrality of the compound; and optionally rinsing the fibers, optionally washing and rinsing the fibers, and optionally drying or allowing the fibers to dry.