Composition comprising (2,5-diaminophenyl)ethanol and a cellulose polymer or carboxylic anionic polymer in a medium rich in fatty substances, dyeing process and device

A process for dyeing keratin fibers comprising applying to the keratin fibers a cosmetic composition comprising:

• a) at least one fatty substance;
• b) at least one polymer chosen from cellulose polymers and carboxylic anionic polymers;
• c) at least one oxidation base chosen from (2,5-diaminophenyl)ethanol, and the acid salts, solvates, and hydrates thereof;
• d) optionally at least one coupler;
• e) optionally at least one basifying agent;
• and
• f) at least one chemical oxidizing agent;
• wherein said cosmetic composition is prepared by mixing a composition (A) and a composition (B),
• wherein composition (A) comprises:
• c) the at least one oxidation base;
• d) optionally, the at least one coupler;
• and
• e) optionally, the at least one basifying agent;
• and
• wherein composition (B) comprises:
• f) the at least one chemical oxidizing agent;
• wherein compositions (A) and (B) are mixed in a weight ratio of (A)/(B) ranging from 0.2 to 1;
• and
• wherein the cosmetic composition comprises a total fatty substance content of at least about 10% by weight, relative to the total weight of the cosmetic composition.

A multi-compartment device comprising:

• either
• i) a first compartment containing composition (A) comprising:
• at least one oxidation base chosen from (2,5-diaminophenyl)ethanol, and the acid salts, solvates, and hydrates thereof c);
• at least one coupler d);
• optionally at least one basifying agent e);
• and
• ii) at least a second compartment containing composition (B) comprising:
• at least one chemical oxidizing agent f);
• wherein at least one of the compositions (A) and (B) comprises:
• at least one fatty substance a), and
• at least one polymer b);
• and,
• wherein a cosmetic composition resulting from mixing compositions (A)+(B) comprises a total fatty substance content of at least about 10% by weight, relative to the total weight of the cosmetic composition resulting from the mixing of (A)+(B);
• or
• i) a first compartment containing an anhydrous composition (A′) comprising at least one fatty substance a);
• ii) a second compartment containing a cosmetic composition A comprising at least one oxidation base c) and at least one coupler d);
• and
• iii) at least a third compartment containing composition B comprising at least one chemical oxidizing agent f);
• wherein a cosmetic composition resulting from the mixing of (A′)+A+B comprises a total fatty substance content of at least about 10% by weight, relative to the total weight of the cosmetic composition resulting from the mixing of (A′)+A+B.