| 摘要 |
Hair dye composition comprises a dissociative direct dye 1,2,3,4,5-pentamethyl-6-vinylbenzene derivative (I). Hair dye composition comprises a dissociative direct dye 1,2,3,4,5-pentamethyl-6-vinylbenzene derivative of formula (I). [Image] R 1>, R 2>, R 3>, R 4>H or a substituent; X : OH or -NHSO 2R 5>; R 5>alkyl, aryl or heterocyclic; and A : divalent capable of forming a methine dye as a whole compound together with the portion other than A. Each of the alkyl, aryl and heterocyclic may have one or more substituents. |
