First agent for oxidative hair dye and method for stabilizing color tone of oxidative hair dye composition
AssigneeHoyu Co., Ltd.
InventorsYosuke KOBAYASHI, Yohei MIZUKAMI, Kohei MORIGUCHI
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Abstract
A first agent for oxidative hair dye of the present disclosure includes: an (A) component, which is at least one selected from the group consisting of resorcin, derivatives thereof, and salts thereof, in a content not exceeding 0.15% by mass; a (B) component, which is a coupler such as m-aminophenol, a (C) component, which is a dye intermediate such as p-phenylenediamine in a content between 0.01% by mass and 0.45% by mass; and a (D) component, which is an alkanolamine.
Claims4
A first agent for oxidative hair dye, comprising:
- an (A) component, which is at least one selected from the group consisting of resorcin, derivatives thereof, and salts thereof, in a content not exceeding 0.15% by mass;
- a (B) component, which is at least one coupler selected from the group consisting of m-aminophenol, 5-amino-o-cresol, α-naphthol, 2,4-diaminophenoxyethanol, 5-(2-hydroxyethylamino)-2-methylphenol, derivatives thereof, and salts thereof;
- a (C) component, which is at least one dye intermediate selected from the group consisting of p-phenylenediamine, toluene-2,5-diamine, p-aminophenol, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, derivatives thereof, and salts thereof, in a content between 0.01% by mass and 0.45% by mass;
- and
- a (D) component, which is an alkanolamine.
A method for stabilizing a color tone of an oxidative hair dye composition comprising a first agent for oxidative hair dye, the method comprising forming the first agent for oxidative hair dye by mixing:
- an (A) component, which is at least one selected from the group consisting of resorcin, derivatives thereof, and salts thereof;
- a (B) component, which is at least one coupler selected from the group consisting of m-aminophenol, 5-amino-o-cresol, α-naphthol, 2,4-diaminophenoxyethanol, 5-(2-hydroxyethylamino)-2-methylphenol, derivatives thereof, and salts thereof;
- a (C) component, which is at least one dye intermediate selected from the group consisting of p-phenylenediamine, toluene-2,5-diamine, p-aminophenol, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, derivatives thereof, and salts thereof;
- and
- a (D) component, which is an alkanolamine,
- wherein the content of the (A) component is 0.15% by mass or less and the content of the (C) component is 0.01 to 0.45% by mass of the first agent for oxidative hair dye.
Dependencies are inferred from the claim text.