Loreal Sa

L'oreal

Maxime De Boni

Alain Lagrange

Frédéric Guerin

Bruno Laguitton

Disclosed herein are compositions for simultaneous shaping, dyeing, and/or lightening of keratin fibers comprising at least one disulfide direct dye and at least one organic or mineral hydroxide alkaline agent. Also disclosed herein are processes for simultaneous shaping, dyeing, and/or lightening of keratin fibers using said compositions and compartmentalized devices comprising said compositions. The compositions disclosed herein may make it possible to obtain a long-lasting dyeing effect, while limiting the degradation of the keratin fibers.

Hair compositions comprising at least one disulfide direct dye and at least one alkaline hydroxide agent and simultaneous hair shaping and dyeing processes

The invention relates to a keratin fiber dyeing composition comprising, in a suitable medium, at least one dye that is selected from among direct dyes and dye precursors, said cosmetic medium containing water and at least one propylene glycol derivative having formula R(OCH)OR(I). The inventive composition can be used to obtain strong color while retaining the softness of the treated hair.

Dyeing composition comprising a dye and a propylene glycol derivative

The present invention relates to a process for dyeing keratin fibres, which comprises the application to the fibres of a composition containing at least one cationic polymer, rinsing of the keratin fibres, the application of a composition containing at least one anionic colored polymer, and rinsing of the keratin fibres. Such a process makes it possible to obtain an improvement in the coloration of the keratin fibres.

Process for dyeing the hair using an anionic coloured polymer

A subject-matter of the present invention is the use, in the coloring of keratinous fibers, of a specific anionic hydrotropic agent of formula: in which X represents CH or N, n represents an integer ranging from 0 to 12, Rrepresents COOM or SOM, Rrepresents a hydroxyl or a C-Calkyl, Rrepresents hydrogen or a C-Calkyl, Rand Rcan together form a ring and M represents hydrogen or one or more inorganic cations providing the electrical neutrality of the compound of formula (I). The invention likewise relates to a dyeing composition comprising at least one dye and such an anionic hydrotrope and to coloring processes employing this dyeing composition.

Use of an anionic hydrotrope for the colouring of keratinous fibres, composition comprising it and colouring processes employing it

A subject-matter of the present invention is the use, in the direct dyeing of keratinous fibers, of at least one direct dye and of a specific cationic hydrotropic agent of formula: in which X represents CH or NRwith Rrepresenting a C-Calkyl, Rrepresents either a hydrogen or a C-Calkyl, if X represents NR, or (CH)NRRRwith R, Rand R, which are identical or different, representing a C-Calkyl and n representing an integer between 0 and 12, if X represents CH; Rrepresents a C-Calkyl; p has a value 0 or 1; the electrical neutrality of the compound being provided by a cosmetically acceptable anion or a mixture of cosmetically acceptable anions. The invention likewise relates to a dyeing composition comprising at least one dye and such a cationic hydrotrope and to colouring processes employing this dyeing composition.

Use of a cationic hydrotrope for the direct dyeing of keratinous fibres, composition comprising it and colouring processes employing it

The present disclosure provides dye compositions comprising at least one hydrophobic direct dye with a logP of greater than 2, at least one organic or mineral acid with a pKa of less than 4.5, in an aqueous-alcoholic dyeing medium comprising at least 60% by weight of water relative to the total weight of the composition, the pH of the composition being less than 7. The compositions allow shades ranging from pastel to strong colorations to be obtained on keratin fibers. Furthermore, the coloration obtained makes it possible to achieve or even exceed the fastness of oxidation dyeing.

Growing community of inventors

Paris, France

Maxime De Boni