Composition for the oxidation dyeing of keratin fibers and dyeing process using this composition

A process for the oxidation dyeing of keratin fibers comprising:

• applying to said keratin fibers at least one ready-to-use dye composition at an application temperature ranging from room temperature to 80° C., wherein said at least one ready-to-use composition comprises:
• at least one oxidation dye,
• at least one 2-electron or 4-electron oxidoreductase enzyme, and
• at least one chitosan chosen from
• at least one chitosan salified with an organic or inorganic acid, wherein said at least one chitosan allows a visually clear solution to be obtained at a concentration of 1% in water, and
• and at least one chemically modified chitosan,
• wherein said at least one chitosan comprises at least one unit of formula (I):
• in which,
• R1 and R2, which are identical or different, are chosen from a hydrogen atom and a radical —XCOOM,
• R3 is chosen from a hydrogen atom, a —COCH3 radical and a radical —CO—X—COOM,
• X is chosen from a C1-C8 alkylene radical, which is optionally branched, or substituted with at least one hydroxyl, halogen or epoxy group,
• M is chosen from a hydrogen atom and a cation chosen from alkali metals, alkaline-earth metals, ammonium, an organic amine and an organic alkanolamine,
• with the proviso that at least one of the units of formula (I) contains a radical —XCOOM or a radical —CO—X—COOM, and
• leaving said at least one ready-to-use composition on said keratin fibers for a period sufficient to develop a desired coloration.

A process for the oxidation dyeing of keratin fibers comprising:

• separately storing at least a first and a second composition,
• wherein said first composition comprises, in a medium suitable for dyeing, at least one oxidation dye,
• wherein said second composition comprises, in a medium suitable for dyeing, at least one 2-electron or 4-electron oxidoreductase enzyme, and
• wherein at least one of said first and said second separately stored compositions further comprises:
• at least one chitosan chosen from
• at least one chitosan salified with an organic or inorganic acid, wherein said at least one chitosan allows a visually clear solution to be obtained at a concentration of 1% in water, and
• at least one chemically modified chitosan,
• wherein said at least one chitosan comprises at least one unit of formula (I):
• in which,
• R1 and R2, which are identical or different, are chosen from a hydrogen atom and a radical —XCOOM,
• R3 is chosen from a hydrogen atom, a —COCH3 radical and a radical —CO—X—COOM,
• X is chosen from a C1-C8 alkylene radical, which is optionally branched, or substituted with at least one hydroxyl, halogen or epoxy group,
• M is chosen from a hydrogen atom and a cation chosen from alkali metals, alkaline-earth metals, ammonium, an organic amine and an organic alkanolamine,
• with the proviso that at least one of the units of formula (I) contains a radical —XCOOM or a radical —CO—X—COOM, and
• mixing said separately stored compositions to form a ready-to-use dye composition, applying said ready-to-use dye composition to said keratin fibers;
• and
• leaving said ready-to-use composition on said keratin fibers for a period sufficient to develop a desired coloration,
• wherein said separately stored compositions are mixed at or just prior to time of application of said ready-to-use dye composition to said keratin fibers.

A multi-compartment dyeing device, comprising at least a first and second compartment,

• wherein a first compartment comprises, in a medium suitable for dyeing, at least one oxidation dye,
• wherein a second compartment comprises, in a medium suitable for dyeing, at least one 2-electron or 4-electron oxidoreductase enzyme, and
• wherein at least compartment further comprises:
• at least one chitosan chosen from
• at least one chitosan salified with an organic or inorganic acid, wherein said at least one chitosan allows a visually clear solution to be obtained at a concentration of 1% in water, and
• at least one chemically modified chitosan,
• wherein said at least one chitosan comprises at least one unit of formula (I):
• in which,
• R1 and R2, which are identical or different, are chosen from a hydrogen atom and a radical —XCOOM,
• R3 is chosen from a hydrogen atom, a —COCH3 radical and a radical —CO—X—COOM,
• X is chosen from a C1-C8 alkylene radical, which is optionally branched, or substituted with at least one hydroxyl, halogen or epoxy group,
• M is chosen from a hydrogen atom and a cation chosen from alkali metals, alkaline-earth metals, ammonium, an organic amine and an organic alkanolamine,
• with the proviso that at least one of the units of formula (I) contains a radical —XCOOM or a radical —CO—X—COOM.