| abstract |
The invention relates to agents for dying keratin fibres, especially human hair, containing, in a cosmetically acceptable carrier as coupling components, at least one m-phenylendiamine derivative of formula (I), wherein R<1> represents a C1-C4-alkyl group or a C1-C4-monohydroxyalkyl group, R<2> represents a methyl group or an ethyl group, and R<3> and R<4> independently represent from each other a branched or non-branched C2- C6-hydroxyalkyl group. The inventive coupling components enable, especially with p--toluylendiamine, 1-(2-hydroxyethyl)-2,5-diaminobenzol, 2,4,5,6-tetraaminopyrimidine and bis-(2-hydroxy-5-aminophenyl) methane, dying to occur with high colour intensity and with good to very good fastness properties in the red and violet ranges. |