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Abstract

The present invention relates to a composition for dyeing keratin fibres, comprising: at least one fatty substance, at least one surfactant; at least one oxidation base, at least one coupler of formula (B3) below and also salts thereof, optical and geometrical isomers and tautomers thereof, and hydrates thereof: (B3) in which; R¹, R³, R⁵ represent a hydrogen; a C₁-C₈ alkyl or alkenyl, —SR or —OR; a (C₁-C₄)alkylcarbonyl; hydrocarbonyl; sulphonic or carboxylic acid; R², R⁴ represent a hydrogen, a C₁-C₈ alkyl or alkenyl; —OR′; two groups chosen from R¹, R², R³, R⁴, R⁵ and borne by adjacent carbon atoms may form, together with said carbon atoms, a ring or a heterocycle which is optionally substituted, and which is optionally interrupted with one or more carbonyl groups; at least one of the radicals R¹, R³, R⁵ representing a hydrogen; at least one of the radicals R² or R⁴ denoting a group —OR′ with R′ representing a C₁-C₈ alkyl or alkenyl, it being possible for this radical to form, with the carbon atom bearing it, one of the neighbouring carbon atoms and its substituent, a heterocycle; at least one alkalinizing agent; the fatty substance content representing in total at least 25% by weight relative to the total weight of the composition. The present invention also relates to a process using this composition in the presence of at least one chemical oxidizing agent, and to multicompartment devices suitable for the implementation of the invention.

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First Claim