Agents for dyeing keratin fibres, containing at least one dimeric, dicationic azo dye and at least one non-ionic surfactant

An agent for dyeing keratinic fibers comprising, in a cosmetic carrier,

• (a) at least one direct dye of the formula (I),
• where
• R1, R4 independently of one another stand for a C1-C6 alkyl group, a C2-C6 alkenyl group, a hydroxy-C2-C6 alkyl group, a cyano-C1-C6 alkyl group, a halogen-C1-C6 alkyl group, an aryl-C1-C6 alkyl group, a heteroaryl-C1-C6 alkyl group, an aryl group, or a heteroaryl group,
• R2, R3 independently of one another stand for a hydrogen atom, C1-C6 alkyl group, a C2-C6 alkenyl group, a hydroxy-C2-C6 alkyl group, a cyano-C1-C6 alkyl group, a halogen-C1-C6 alkyl group, an aryl-C1-C6 alkyl group, a heteroaryl-C1-C6 alkyl group, an aryl group, or a heteroaryl group,
• R5, R6, R7, R8 independently of one another stand for a hydrogen atom, a C1-C6 alkyl group, a halogen atom from the group comprising chlorine, bromine, fluorine, or iodine, or for a C1-C6 alkoxy group,
• X1, X2 independently of one another stand for a physiologically acceptable anion, chloride, bromide, iodide, methyl sulfate, methyl sulfonate, p-toluenesulfonate, acetate, hydrogen sulfate, ½ sulfate, or ½ tetrachlorozincate,
• Q stands for a grouping of the formula (II), (III), (IV), or (V),
• n stands for an integer from 3 to 6,
• m, p, q each independently of one another stand for the numbers 2 or 3,
• R9 stands for a hydrogen atom, for a C1-C6 alkyl group, for a C2-C6 alkenyl group, or for a hydroxy-C2-C6 alkyl group,
• and
• (b) at least one nonionic surfactant.