Composition for the oxidation dyeing of keratinous fibers comprising at least one oxidation dye and at least one cationic amphiphilic polymer, and dyeing methods

A ready-to-use composition for the oxidation dyeing of keratinous fibers comprising, in a medium suitable for dyeing:

• (a) at least one oxidation dye,
• (b) at least one cationic amphiphilic polymer comprising at least one fatty chain, and
• (c) a combination comprising:
• (I) at least one compound chosen from oxyalkylenated fatty alcohols and glycerolated fatty alcohols, and
• (II) at least one hydroxylated solvent having a molecular weight of less than 250,
• wherein the weight ratio of (I) to (II) is greater than 1:1;
• and
• (d) at least one oxidizing agent.

A process for dyeing keratinous fibers comprising:

• (1) storing a composition (A) comprising, in a medium suitable for dyeing:
• (a) at least one oxidation dye,
• (b) at least one cationic amphiphilic polymer comprising at least one fatty chain, and
• (c) a combination comprising:
• (I) at least one compound chosen from oxyalkylenated fatty alcohols and glycerolated fatty alcohols, and
• (II) at least one hydroxylated solvent having a molecular weight of less than 250,
• wherein the weight ratio of (I) to (II) is greater than 1:1;
• (2) storing, separately from said composition (A), a composition (B) comprising, in a medium suitable for dyeing, at least one oxidizing agent;
• (3) applying said composition (A) and said composition (B) to keratinous fibers, and
• (4) developing a color on keratinous fibers;
• wherein said composition (A) is combined at the time of use with said composition (B) and applied to the keratinous fibers, or wherein said composition (A) and said composition (B) are applied sequentially to said at least one dyeing composition without intermediate rinsing.

A device or kit for the oxidation dyeing of keratinous fibers, comprising at least two compartments, wherein:

• (1) a first compartment comprises, in a medium suitable for dyeing:
• (a) at least one oxidation dye,
• (b) at least one cationic amphiphilic polymer comprising at least one fatty chain, and
• (c) a combination comprising:
• (I) at least one compound chosen from oxyalkylenated fatty alcohols and glycerolated fatty alcohols, and
• (II) at least one hydroxylated solvent having a molecular weight of less than 250,
• wherein the weight ratio of (I) to (II) is greater than 1:1;
• and
• (2) a second compartment comprising, in a medium suitable for dyeing, at least one oxidizing agent.

A composition for oxidation dyeing of keratinous fibers comprising, in a medium suitable for dyeing:

• (a) at least one oxidation dye,
• (b) at least one cationic amphiphilic polymer comprising at least one fatty chain, and
• (c) a combination comprising:
• (I) at least one compound chosen from oxyalkylenated fatty alcohols and glycerolated fatty alcohols, and
• (II) at least one hydroxylated solvent,
• wherein the weight ratio of (I) to (II) is greater than 1:1.