Keratinous fiber dye composition containing a 2-substituted amino-5-alkylphenol derivative coupler
AssigneeKao Corporation
InventorsMasahiko Ogawa, Hidetoshi Tagami, Toru Yoshihara, Jiro Kawase, Akira Kiyomine, Tadashi Tamura, Yoshinori Nishizawa, Ken-ichi Matsunaga
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Abstract
A keratinous fiber dye composition comprising a developer and a coupler, wherein the coupler is a 2-substituted amino-5-alkylphenol derivative represented by the following formula (1): ##STR1## wherein the all symbols are defined in the disclosure, is disclosed. The keratinous fiber dye composition imparts a color tone of a high chroma and is excellent in coloring power and fastness.
Claims4
A keratinous fiber dye composition comprising an aromatic diamine developer and a coupler, wherein said coupler is a 2-substituted amino-5-alkylphenol derivative represented by the following formula (1):
- ##STR5## wherein R.sup.1 represents an alkyl group having from 1 to 4 carbon atoms;
- R.sup.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group having from 1 to 4 carbon atoms, a substituted or unsubstituted alkoxy group having from 1 to 4 carbon atoms or a substituted or unsubstituted amino group;
- R.sup.3 represents a hydrogen atom or a substituted or unsubstituted acyl group having from 2 to 5 carbon atoms;
- and R.sup.4 represents a hydrogen atom, a halogen atom or an alkoxy group having from 1 to 4 carbon atoms which may be substituted with a hydroxyl group;
- or a cosmetically acceptable salt thereof, wherein the molar ratio of said developer to said coupler is from about 1:0.5 to 1:2.
A method for dyeing a keratinous fiber which comprises applying to the keratinous fiber a composition comprising an aromatic diamine developer and a coupler, wherein said coupler is a 2-substituted amino-5-alkylphenol derivative represented by the following formula (1):
- ##STR7## wherein R.sup.1 represents an alkyl group having from 1 to 4 carbon atoms;
- R.sup.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group having from 1 to 4 carbon atoms, a substituted or unsubstituted alkoxy group having from 1 to 4 carbon atoms or a substituted or unsubstituted amino group;
- R.sup.3 represents a hydrogen atom or a substituted or unsubstituted acyl group having from 2 to 5 carbon atoms;
- and R.sup.4 represents a hydrogen atom, a halogen atom or an alkoxy group having from 1 to 4 carbon atoms which may be substituted with a hydroxyl group;
- or a cosmetically acceptable salt thereof, wherein the molar ratio of said developer to said coupler is from about 1:0.5 to 1:2.
Dependencies are inferred from the claim text.