Dye composition comprising an alkoxylated fatty alcohol ether and a fatty alcohol

A method for dyeing keratin fibers, the method comprising applying to said fibers a composition comprising:

• at least one oxidation dye;
• at least one nonionic ether of polyoxyalkylenated fatty alcohols of formula (i):
• R—(OCH2CH2)n—OR′ (i)
• wherein:
• R denotes a linear or branched, saturated or unsaturated C10-C30 hydrocarbon-based radical,
• R′ denotes a linear or branched, saturated or unsaturated C10-C30 hydrocarbon-based radical, optionally substituted with a hydroxyl radical, said hydroxyl radical optionally being beta to the ether function, and
• n is an integer ranging from 1 to 100, inclusive;
• at least one compound chosen from fatty alcohols comprising at least 20 carbon atoms, fatty acid esters that are solid at a temperature of about 25° C. and a pressure of about 760 mmHg, and mixtures thereof;
• at least one chemical oxidizing agent;
• and
• at least one additional fatty substance other than fatty alcohols comprising at least 20 carbon atoms and fatty esters that are solid at a temperature of about 25° C. and a pressure of about 760 mmHg, wherein said at least one additional fatt substance is chosen from liquid petroleum jelly, C6-C16 alkanes, polydecenes, liquid fatty alcohols comprising less than 20 carbon atoms, liquid esters of fatty acids or of fatty alcohols, and mixtures thereof, wherein the at least one additional fatty substance is present in an amount of at least about 25% by weight, relative to the total weight of the composition.

A multi-compartment device for implementing a method for dyeing keratin fibers, the method comprising:

• applying to said fibers a composition comprising:
• at least one oxidation dye;
• at least one nonionic ether of polyoxyalkylenated fatty alcohols of formula (i):
• R—(OCH2CH2)n—OR′ (i)
• wherein:
• R denotes a linear or branched, saturated or unsaturated C10-C30 hydrocarbon-based radical,
• R′ denotes a linear or branched, saturated or unsaturated C10-C30 hydrocarbon-based radical, optionally substituted with a hydroxyl radical, said hydroxyl radical optionally being beta to the ether function, and
• n is an integer ranging from 1 to 100, inclusive;
• at least one compound chosen from fatty alcohols comprising at least 20 carbon atoms, fatty acid esters that are solid at a temperature of about 25° C. and a pressure of about 760 mmHg, and mixtures thereof;
• at least one chemical oxidizing agent;
• and
• at least one additional fatty substance other than fatty alcohols comprising at least 20 carbon atoms and fatty esters that are solid at a temperature of about 25° C. and a pressure of about 760 mmHg, wherein said at least one additional fatt substance is chosen from h liquid petroleum jelly, C6-C16 alkanes, polydecenes, liquid fatty alcohols comprising less than 20 carbon atoms, liquid esters of fatty acids or of fatty alcohols, and mixtures thereof, wherein the at least one additional fatty substance is present in an amount of at least about 25% by weight, relative to the total weight of the composition;
• preparing the composition extemporaneously before said application by mixing at least two formulations comprising:
• a formulation (A) free of chemical oxidizing agent and comprising at least one oxidation dye and at least one nonionic ether of polyoxyalkylenated fatty alcohols of formula (i);
• and
• a formulation (B) comprising at least one chemical oxidizing agent;
• wherein at least one of formulation (A) and formulation (B) comprise the at least one compound chosen from fatty alcohols comprising at least 20 carbon atoms, fatty acid esters that are solid at a temperature of about 25° C. and a pressure of about 760 mmHg, and mixtures thereof;
• the multi-compartment device comprising:
• a first compartment for containing formulation (A), and
• a second compartment for containing formulation (B).