| 摘要 |
A composition for dyeing keratin fibers comprising a diamino-N,N-dihydropyrazolone derivative, a coupler and a surfactant is provided to obtain strong coloration of keratin fibers in varied shades having resistance to light and washing at neutral pH. The composition for dyeing keratin fibers comprises the diamino-N,N-dihydropyrazolone derivative represented by the formula(I), at least one coupler and at least one surfactant, wherein R1, R2, R3 and R4 are the same or different, and are each independently linear or branched C1-C10 alkyl radical optionally substituted by heteroaryl or aryl which is optionally substituted by (C1-C4)alkyl, hydroxyl, C1-C2 alkoxy, amino or (di)(C1-C2)alkylamino group, sulfonamido radical SO2NR6R7, carboxamido radical CONR6R7, sulfonic radical, carboxyl radical, radical NR6R7 or radical OR5; aryl radical optionally substituted by (C1-C4)alkyl, hydroxyl, C1-C2 alkoxy, amino or (di)(C1-C2)alkylamino radical; or 5- or 6-membered heteroaryl radical optionally substituted by (C1-C4)alkyl or (C1-C2)alkoxy radical; and the surfactant is selected from (C8-C30)alkyl ether carboxylic acid and its salt, (C12-C30)alkyl polyglucoside, monoglycerolated surfactants, or polyglycerolated surfactants.
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