Patent ID: 7485156

Claim:
A composition for dyeing keratin fibers, comprising, in a suitable medium: at least one oxidation base chosen from diamino-N,N-dihydropyrazolone compounds of formula (I), and addition salts thereof: in which: R 1 , R 2 , R 3 and R 4 , which may be identical or different, are chosen from: linear and branched C 1 -C 10 alkyl radicals optionally substituted with at least one radical chosen from OR 5 , NR 6 R 7 , carboxyl radicals, sulfonic radicals, carboxamido radicals CONR 6 R 7 , sulfonamido radicals SO 2 NR 6 R 7 , heteroaryls and aryls optionally substituted with at least one group chosen from (C 1 -C 4 )alkyl, hydroxyl, C 1 -C 2 alkoxy, amino and (di)(C 1 -C 2 )alkylamino groups; aryl radicals optionally substituted with at least one radical chosen from (C 1 -C 4 )alkyl, hydroxyl, C 1 -C 2 alkoxy, amino and (di)(C 1 -C 2 )alkylamino radicals; 5- or 6-membered heteroaryl radicals, optionally substituted with at least one radical chosen from (C 1 -C 4 )alkyl and (C 1 -C 2 )alkoxy radicals; R 3 and R 4 may also be a hydrogen atom; R 5 , R 6 and R 7 , which may be identical or different, are chosen from: hydrogen atoms; linear and branched C 1 -C 4 alkyl radicals optionally substituted with at least one radical chosen from hydroxyl, C 1 -C 2 alkoxy, carboxamido CONR 8 R 9 , sulfonyl SO 2 R 8 and aryl radicals optionally substituted with at least one radical chosen from (C 1 -C 4 )alkyl, hydroxyl, C 1 -C 2 alkoxy, amino and (di)(C 1 -C 2 )alkylamino radicals; aryl optionally substituted with at least one radical chosen from (C 1 -C 4 )alkyl, hydroxyl, C 1 -C 2 alkoxy, amino and (di)(C 1 -C 2 )alkylamino radicals; R 6 and R 7 , which may be identical or different, may also be chosen from carboxamido radicals CONR 8 R 9 ; and sulfonyl radicals SO 2 R 8 ; R 8 and R 9 , which may be identical or different, are chosen from hydrogen atoms; linear and branched C 1 -C 4 alkyl radicals optionally substituted with at least one radical chosen from hydroxyl radicals and C 1 -C 2 alkoxy radicals; R 1 and R 2 , on the one hand, and R 3 and R 4 , on the other hand, may form, with the nitrogen atom(s) to which they are attached, a saturated or unsaturated 5- to 7-membered heterocycle optionally substituted with at least one entity chosen from halogen atoms and from amino, (di)(C 1 -C 4 )alkylamino, hydroxyl, carboxyl, carboxamido and (C 1 -C 2 )alkoxy radicals, and from C 1 -C 4 alkyl radicals optionally substituted with at least one radical chosen from hydroxyl, amino, (di)alkylamino, alkoxy, carboxyl and sulfonyl radicals; R 3 and R 4 may also form, together with the nitrogen atom to which they are attached, a 5- or 7-membered heterocycle, the carbon atoms of which may be replaced with an optionally substituted oxygen or nitrogen atom; at least one coupler; and at least one associative polymer of polyurethane type.