申请人:Yamaguchi Masakazu
公开号:US20100146716A1
公开(公告)日:2010-06-17
A hair dye composition containing an azo dye represented by any one of the formulas (1) to (5): [wherein R
1
, R
2a
, and R
2b
each represents a hydrogen atom or a substituent, A and A′ each represents an aromatic heterocyclic residue (having a free valence at carbon atom thereof) and these groups have, in the structure thereof, none of a carboxy group, a sulfo group, and a quaternary ammonium group]; [R represents a coupler component, X
1
to X
4
represent atoms coupled together with the carbon atom sandwiched between X
1
and X
4
to form a 5-membered heteroaromatic ring, V
1
and V
2
each represents a substituent, and a1 and a2 each stands for from 0 to 3]; and [R
3
represents a hydroxy group, an alkylsulfonylamino group, an arylsulfonylamino group, or —CH(R
4
)(R
5
) (R
4
and R
5
each representing a substituent having a Hammett's constant ? of 0.2 or greater and less than 1.4), W represents a S atom or N—R
6
(R6 representing a substituent), X, Y and Z each represents a nitrogen atom or a carbon atom, R
7
and R
8
each represents a substituent, and b stands for from 0 to 2].