Loreal Sa

Jean-Jacques Vandenbossche

Alain Lagrange

Stéphane Sabelle

Laurent Vidal

Christian Blaise

Jean-Baptiste Saunier

Philippe Breton

The present disclosure relates to novel N-alkylpolyhydroxylated secondary para-phenylenediamines, to processes for preparing them, to compositions for dyeing keratin fibers, for example keratin fibers such as the hair, comprising, in a medium that is suitable for dyeing, at least one such secondary para-phenylenediamine. The present disclosure also relates to processes for dyeing keratin fibers with the compositions according to the present disclosure, and to dyeing kits containing such compositions.

N-alkylpolyhydroxylated secondary para-phenylenediamines, dye compositions comprising them, processes, and uses thereof

The present invention relates to novel secondary para-phenylenediamines bearing an alkoxy group, to a process for preparing them, and to their use in the oxidation dyeing of hair. The invention also relates to a composition for dyeing keratin fibers, in particular human keratin fibers such as hair, containing, in a medium that is suitable for dyeing, at least one secondary para-phenylenediamine. Further, the invention relates to a process for dyeing keratin fibers using the aforementioned composition, and to a dyeing kit containing the composition.

Secondary para-phenylenediamines bearing an alkoxy group, dye composition comprising them, processes therefor and uses thereof

The subject of the invention is novel compounds derived from naphth-1-ol comprising at least one cationic group, their use as coupler for the oxidation dyeing of keratinous fibres, compositions for the oxidation dyeing of keratinous fibres, and in particular human keratinous fibres such as hair, containing them in combination with at least one oxidation base, as well as methods of oxidation dyeing using them.

Cationic couplers and their use for oxidation dyeing

The invention relates to a composition for the oxidation dyeing of keratin fibers, and in particular of human keratin fibers such as the hair, comprising at least one oxidation base and, as coupler, at least one 2-hydroxynaphthalene of formula (I) comprising at least one cationic group Z of formula (II), to their use as couplers for the oxidation dyeing of keratin fibers, to oxidation dyeing processes using them and to novel cationic 2-hydroxynaphthalenes of formula (I&prime;).

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Begaar, France

Jean-Jacques Vandenbossche