Use of an anionic hydrotrope for the colouring of keratinous fibres, composition comprising it and colouring processes employing it
AssigneeL'oreal
InventorsMaxime De Boni, Alain LaGrange
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Abstract
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, R1 represents COOM or SO3M, R2 represents a hydroxyl or a C1-C4 alkyl, R3 represents hydrogen or a C1-C4 alkyl, R2 and R3 can 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.
Claims17
A process for coloring keratinous fibers comprising applying to the fibers a dye composition comprising
- (a) at least one anionic hydrotrope of following formula (I):
- wherein:
- X represents a CH group or a nitrogen atom,
- n is an integer varying from 0 to 12,
- R1 represents an SO3M group,
- R2 represents a hydroxyl radical or a linear or branched C1-C4 alkyl radical, and
- R3 represents a hydrogen atom or a linear or branched C1-C4 alkyl radical, or
- R2 and R3 can together form an unsaturated 5- or 6-membered ring, optionally substituted by a COOM group,
- M represents a hydrogen atom or at least one inorganic cation providing the electrical neutrality of the compound of formula (I), and
- (b) at least one dye chosen from at least one direct dye and at least one oxidation dye,
- wherein the composition does not comprise naphthalenesulphonic acid or a salt thereof.
A dyeing composition for coloring human keratinous fibers comprising, in a medium appropriate for coloring, at least one anionic hydrotrope and at least one dye chosen from at least one direct dye and/or at least one oxidation dye, wherein the at least one anionic hydrotrope has the following formula (II):
- wherein:
- X represents a CH group or a nitrogen atom,
- n is an integer varying from 0 to 12,
- R1 represents an SO3M group,
- R2 represents a hydroxyl radical or a linear or branched C1-C4 alkyl radical, and
- R3 represents a hydrogen atom or a linear or branched C1-C4 alkyl radical or
- R2 and R3 can together form an unsaturated 5- or 6-membered ring, optionally substituted by a COOM group.
- M represents a hydrogen atom or at least one inorganic cation providing the electrical neutrality of the compound of formula (I), and
- wherein the composition does not comprise naphthalenesulphonic acid or a salt thereof.
A process for coloring keratinous fibers comprising:
- a) preparing a ready-for-use composition by mixing a dye composition comprising, in a medium appropriate for coloring, at least one direct dye and/or at least one oxidation dye together with a composition comprising at least one oxidizing agent;
- wherein at least one anionic hydrotropic agent is present in the dye composition, in the composition comprising the oxidizing agent or in both these compositions simultaneously,
- b) applying the ready-for-use composition to the keratinous fibers and leaving it standing for a period of time sufficient to obtain a desired effect;
- c) optionally rinsing the keratinous fibers;
- and
- d) washing the fibers with a shampoo, rinsing the fibers, and drying the fibers wherein the at least one anionic hydrotropic agent has the following formula (III):
- wherein:
- X represents a CH group or a nitrogen atom,
- n is an integer varying from 0 to 12
- R1 represents an SO3M group,,
- R2 represents a hydroxyl radical or a linear or branched C1-C4 alkyl radical, and
- R3 represents a hydrogen atom or a linear or branched C1-C4 alkyl radical or
- R2 and R3 can together form an unsaturated 5- or 6-membered ring, optionally substituted by a COOM group,
- M represents a hydrogen atom or at least one inorganic cation providing the electrical neutrality of the compound of formula (I), and
- wherein said ready-for-use composition does not comprise naphthalenesulphonic acid or a salt thereof.
Dependencies are inferred from the claim text.