Emulsion dyeing composition containing at least one quarternary amine, at least one nonionic surfactant and at least one carboxylic acid and method of using the same

A method of dyeing keratinous substrates, comprising applying onto the keratinous substrates a ready-to-use aqueous composition containing, in a cosmetically acceptable medium,

• a) at least one fatty quaternary amine compound;
• b) at least one nonionic surfactant;
• c) at least one compound chosen from an alkyl ether carboxylic acid, an alkyl ether carboxylate, a fatty acid having from about 6 to about 40 carbon atoms, and mixtures thereof;
• d) at least one dye chosen from oxidation dye precursors and direct dyes;
• e) optionally, at least one thickening agent;
• f) optionally, at least one alkaline agent;
• g) optionally, at least one fatty substance other than a fatty acid;
• h) optionally, at least one salt;
• and
• i) at least one oxidizing agent.

A ready-to-use aqueous composition for the oxidative dyeing of keratinous substrates comprising, in a cosmetically acceptable medium,

• a) from about 1 to about 10% by weight at least one fatty quaternary amine compound;
• b) from about 1 to about 30% by weight at least one nonionic surfactant;
• c) from about 0.5 to about 20% by weight at least one compound chosen from an alkyl ether carboxylic acid, an alkyl ether carboxylate, a fatty acid having from about 6 to about 40 carbon atoms, and mixtures thereof;
• d) at least one oxidative dye chosen from oxidation bases and couplers;
• e) optionally, at least one thickening agent;
• f) from about 0.1 to about 15% by weight of at least one alkaline agent;
• g) at least 10% by weight of at least one fatty substance other than a fatty acid;
• h) optionally, at least one salt;
• and
• i) from about 0.1 to about 20% by weight of at least one oxidizing agent.

A kit for dyeing keratinous substrates, comprising:

• 1) a first unit containing, in a cosmetically acceptable medium:
• a) at least one fatty quaternary amine compound;
• b) at least one nonionic surfactant;
• c) at least one compound chosen from an alkyl ether carboxylic acid, an alkyl ether carboxylate, a fatty acid having from about 6 to about 40 carbon atoms, and mixtures thereof;
• d) at least one oxidative dye chosen from oxidation bases and couplers;
• and
• e) optionally, at least one thickening agent;
• f) optionally, at least one alkaline agent;
• g) optionally, at least one fatty substance other than a fatty acid;
• and
• h) optionally, at least one salt;
• and
• 2) a second unit comprising at least one oxidizing agent and optionally, at least one fatty substance other than a fatty acid.

A kit for dyeing keratinous substrates, comprising:

• 1) a first unit containing, in a cosmetically acceptable medium:
• a) at least one fatty quaternary amine compound;
• b) at least one nonionic surfactant;
• c) at least one compound chosen from an alkyl ether carboxylic acid, an alkyl ether carboxylate, a fatty acid having from about 6 to about 40 carbon atoms, and mixtures thereof;
• d) at least one oxidative dye chosen from oxidation bases and couplers;
• and
• e) optionally, at least one thickening agent;
• f) optionally, at least one alkaline agent;
• g) optionally, at least one fatty substance other than a fatty acid;
• and
• h) optionally, at least one salt;
• 2) a second unit comprising at least one oxidizing agent and optionally, at least one fatty substance other than a fatty acid;
• and
• 3) a third unit comprising at least one salt in a cosmetically acceptable medium.