| 摘要 |
<p>Provided is a hair dye composition comprising a direct dye (1): A-CR<1>=N-NR<2>-B X<-> Äwherein, A represents a group (2) or (3): <CHEM> (in which, R<3>, R<4> and R<5> each independently represents a (substituted) C1-6 alkyl group, ring C may have a substituent or may by cyclocondensed with an aromatic ring, R<6> and R<7> each independently represents a (substituted) C1-6 alkyl group, or may be coupled to form a heterocycle together with the adjacent nitrogen atom, Z represents a (substituted) C1-4 divalent linear hydrocarbon group and ring D may be cyclocondensed with an aromatic ring), B represents a (substituted) aromatic group, R<1> represents H or a (substituted) C1-6 alkyl group, R<2> represents H or a (substituted) C1-6 alkyl group or a (substituted) aromatic group or may form a heterocycle together with the C atom of the aromatic ring B, and X<-> represents an anionÜ. This hair dye composition has markedly strong hair dyeing power and less color fade over time, and undergoes a smaller change in color tone of the dye even after storage.</p> |
