Hair dye composition
AssigneeKao Corporation
InventorsYukihiro Ohashi, Hajime Miyabe, Kenichi Matsunaga, Shintaro Totoki, Yoshinori Saito
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Abstract
Provided is a hair dye composition containing a direct dye (1). 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. wherein, rings A and B represents a benzene ring which may have a substituent and may further be cyclocondensed with another aromatic ring, D and E each independently represents a group NR3 (in which R3 represents a C1-6 alkyl group) or an S atom, R1 and R2 each independently represents a C1-6 alkyl group, and X− represents an anion.
Claims19
A hair dye composition comprising, as a direct dye, a compound represented by the following formula (1):
- wherein, rings A and B each independently represents a benzene ring which may have a substituent and may further be cyclocondensed with another aromatic ring;
- D and E each independently represents a group NR3 (in which R3 represents a C1-6 alkyl group) or a sulfur atom;
- R1 and R2 each independently represents a C1-6 alkyl group, and
- X− represents an anion;
- an oxidizing agent;
- and
- an oxidation dye.
A method comprising dyeing the hair with a hair dye composition comprising, as a direct dye, a compound represented by the following formula (1):
- wherein, rings A and B each independently represents a benzene ring which may have a substituent and may further be cyclocondensed with another aromatic ring;
- D and E each independently represents a group NR3 (in which R3 represents a C1-6 alkyl group) or a sulfur atom;
- R1 and R2 each independently represents a C1-6 alkyl group, and
- X− represents an anion.
Dependencies are inferred from the claim text.