| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hair dye composition having extremely high hair dye power, slight color fading with days and a slight change in color tone even in preservation. SOLUTION: This hair dye composition contains a direct dye of formula (1) or formula (2) [Y is a group of formula (y1), (y2), (y3), (y4) which may contain a substituent group or a (substituted) benzene ring condensed with a quinoline ring; Z is a polyfunctional crosslinkable group; Q is N+R1R2R3 (R1 to R3 are each a (substituted) 1-6C alkyl group or two or three of R1 to R3 form a heterocyclic ring with N') ; Y' is a group of formula (y1'), (y2'), (y3') or (y4') which may contain a substituent group or a (substituted) benzene ring condensed with a quinoline ring; X is a -N= group or a -N+R= (R is a (substituted) 1-6C alkyl group; (m) and (n) are each 1 or 2; ring A and ring B each may contain a substituent group; An- is an anion).
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