| 摘要 |
A composition for dyeing keratin fibers comprising a diamino-N,N-dihydropyrazolone derivative, a coupler and an associative polyurethane polymer is provided to serve fast and strong coloration which shows good resistant to light and washing to keratin fibers. 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 associative polyurethane polymer, wherein R1, R2, R3 and R4 are the same or different, and are each independently a linear or branched C1-C10 alkyl radical optionally substituted by heteroaryl or aryl 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; an aryl radical optionally substituted by (C1-C4)alkyl, hydroxyl, C1-C2 alkoxy, amino or (di)(C1-C2)alkylamino radical; or a 5- or 6-membered heteroaryl radical optionally substituted by (C1-C4)alkyl or (C1-C2)alkoxy radical; the coupler is meta-phenylenediamine, meta-aminophenol, meta-diphenol, naphthalene-based coupler, heterocyclic coupler, and the addition salt thereof; and the associative polyurethane polymer is cationic, anionic or non-ionic associative polyurethane polymer.
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