Double secondary para-phenylenediamine compounds, dye compositions comprising same, and dyeing process using the compositions

#The present disclosure relates to a dye composition comprising at least one double secondary para-phenylenediamine compound, and also to a process for dyeing keratin fibers using the composition. The present disclosure also relates to double secondary para-phenylenediamine compounds.

#It is known practice to dye keratin fibers, such as human hair, with dye compositions containing oxidation dye precursors, which are generally known as oxidation bases. These oxidation bases can be colorless or weakly colored compounds, which, when combined with oxidizing products, may give rise to colored compounds by a process of oxidative condensation. It is also known that the shades obtained with these oxidation bases may be varied by combining them with couplers or coloration modifiers.

#The variety of molecules that may used as oxidation bases and couplers allows a wide range of colors to be obtained.

#Accordingly, one aspect of the present disclosure are the compounds and addition salts of formula (I):

#wherein: R, which may be identical or different, is chosen from C1-C2 alkyl radicals; C1-C2 alkoxy radicals; and halogen atoms, such as chlorine; m, which may be identical or different, is an integer ranging from 0 to 4; n is an integer ranging from 1 to 3; on condition that when n is equal to 1, m does not equal 0.

#Another aspect of the present disclosure are dye compositions comprising, in a medium that is suitable for dyeing keratin fibers, such as human keratin fibers, at least one compound and the addition salts of formula (I′):