| abstract |
Disclosed are novel substances for dyeing keratinic fibers, particularly human hair. Said substances contain at least one compound of formula (I) and/or the enamine form (I) thereof, wherein R represents an allyl group, a hydroxy-(C2- to C6)-alkyl group, or an optionally substituted benzyl group while X- represents a physiologically acceptable anion, as well as at least one aldehyde as component B, which is selected among the group comprising 4-hydroxy-3-methoxybenzaldehyde, 3,5-dimethoxy-4-hydroxybenzaldehyde, 4-hydroxy-1-naphthaldehyde, 4-hydroxy-2-methoxybenzaldehyde, 3,4-dihydroxy-5-methoxybenzaldehyde, 3,4,5-trihydroxybenzaldehyde, 3,5-dibromine-4-hydroxybenzaldehyde, 4-hydroxy-3-nitrobenzaldehyde, 3-bromine-4-hydroxybenzaldehyde, 4-hydroxy-3-methylbenzaldehyde, 3,5-dimethyl-4-hydroxy-benzaldehyde, 5-bromine-4-hydroxy-3-methoxybenzaldehyde, 4-diethylamino-2-hydroxybenzaldehyde, and 4-dimethylamino-2-methoxybenzaldehyde. The inventive dyes are suitable as hair dyeing agents and for reviving the color of or tinting previously dyed keratinic fibers, resulting in shiny colors that are provided with excellent lightfastness. |