Hair dye composition
AssigneeKao Corporation
InventorsYukihiro Ohashi, Hajime Miyabe, Kenichi Matsunaga, Shintaro Totoki, Yoshinori Saito
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AssigneeKao Corporation
InventorsYukihiro Ohashi, Hajime Miyabe, Kenichi Matsunaga, Shintaro Totoki, Yoshinori Saito
Estimating the term…
Provided is a hair dye composition containing a direct dye A—D═D—B. This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye even after storage. A represents any one of the following groups (2) to (8): (in which R1, R4, R5 and R6 each represents H, (substituted) C1-6 alkyl group, etc., R2 and R3 each represents (substituted) C1-6 alkyl group, etc., or form, when taken together with the adjacent C, a cycloalkane ring, Q represents N or group CR′, R7 represents (substituted) aralkyl group or a group CH2—CH(OH)—CH2—OR″, R8 and R9 each represents H, (substituted) C1-6 alkyl, etc., or form, when taken together with the adjacent N, a heterocycle, X− represents an anion, and rings C-I may each have a further substituent or a condensed ring), D represents N or group CR′″, and B represents the residue of a coupling component.
A hair dye composition, comprising:
A hair dye composition, comprising:
A hair dye composition, comprising:
A method of dyeing hair, comprising:
A method of dyeing hair, comprising:
A method of dyeing hair, comprising:
Dependencies are inferred from the claim text.