One-part hair dye composition

Abstract

The present invention provides a one-component hair dye composition that can stably combine a predetermined melanin precursor with a specific direct dye, thereby enabling a wide range of hair color expressions and resulting in a pleasant feel for the hair after treatment. [Solution] The following components (A) to (E): (A) A compound represented by the following formula (1) or a salt thereof TIFF2026047289000013.tif35170 (In equation (1), the dashed line indicates the presence or absence of a π bond. R 1 R represents a hydroxyl group or an acetoxy group. 2 R represents a hydrogen atom, or a -COOR group (where R is a hydrogen atom, a methyl group, or an ethyl group). 3 (A) represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group.) (B) A neutral or anionic direct dye (C) An alkaline agent (D) A nonionic surfactant (E) A cationic surfactant, wherein the ratio of the mass content of component (D) to the mass content of component (B), (D) / (B), is 3.0 or more and 30.0 or less, and the pH is 8.0 or more and 11.0 or less, a one-component hair dye composition.

Description

[Technical Field]

[0001] The present invention relates to a one-component hair dye composition. [Background technology]

[0002] Since hair color is expressed by the amount and ratio of melanin pigment, dyeing hair with melanin pigment is expected to produce a more natural finish, and much research has been conducted on this. In particular, hair dyeing compositions using dihydroxyindole, a precursor of eumelanin, and its derivatives have been investigated. However, since eumelanin is dark brown, other dyes are necessary to express a wide range of hair colors using it.

[0003] Patent Document 1 describes a multi-component hair dye comprising (A) an acidic agent containing a melanin precursor and (B) a reducing agent, and (C) an alkaline agent containing an alkaline agent, wherein one or more of the agents contain (D) a nonionic or anionic direct dye, and the agents are applied to the hair simultaneously, wherein the total alkalinity when the agents are mixed is below a specific value, and this air-oxidizing hair dye prevents the polymerization of the melanin precursor before use and provides sufficient hair dyeing power by applying the agents simultaneously. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-184460 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] However, the hair dye described in Patent Document 1, which involves mixing multiple agents, has drawbacks such as complexity and the risk of misalignment of the mixing ratio when combining the agents. Therefore, a single-component hair dye that can achieve a wide range of hair color expressions is desired. However, in the presence of a melanin precursor, the air oxidation of the melanin derivative proceeds rapidly, causing a polymerization reaction outside the hair, and the polymerized pigment is adsorbed onto the hair surface, which may reduce the feel of the hair. Furthermore, in the case of air-oxidation type hair dyes such as melanin precursors, if the composition is made alkaline to obtain high dyeing performance, the reaction proceeds easily within the composition and is affected by even small amounts of dissolved oxygen, making it extremely difficult to stably formulate it as a single-component product.

[0006] The object of the present invention is to provide a one-component hair dye composition that can stably combine a predetermined melanin precursor and a specific direct dye, thereby enabling a wide range of hair color expressions that cannot be achieved with the predetermined melanin precursor alone, and further providing a good feel for the hair after treatment. [Means for solving the problem]

[0007] The present inventors have found that the above problem can be solved by a one-component hair dye composition containing a predetermined melanin precursor, a specific direct dye, and a nonionic surfactant in specific ratios. In other words, the present invention relates to the following. [1] The following components (A) to (E): (A) Compounds represented by the following formula (1) or salts thereof [ka] (In equation (1), the dashed line indicates the presence or absence of a π bond. R 1 R represents a hydroxyl group or an acetoxy group. 2 R represents a hydrogen atom, or a -COOR group (where R is a hydrogen atom, a methyl group, or an ethyl group). 3 (This represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group.) (B) Neutral or anionic direct dyes (C) Alkaline agent (D) Nonionic surfactant (E) Cationic surfactant A one-component hair dye composition containing the above, wherein the ratio (D) / (B) of the mass content of component (D) to the mass content of component (B) is 3.0 or more and 30.0 or less, and the pH is 8.0 or more and 11.0 or less. [2] A method of dyeing hair by applying the one-component hair dye composition described in [1] above to the hair. [Effects of the Invention]

[0008] The present invention provides a one-component hair dye composition that allows for the stable blending of a predetermined melanin precursor and a specific direct dye, resulting in a wide range of hair color expression and a pleasant feel to the hair after treatment. [Modes for carrying out the invention]

[0009] [One-part hair dye composition] The one-component hair dye composition of the present invention comprises the following components (A) to (D): (A) Compounds represented by the following formula (1) or salts thereof [ka] (In equation (1), the dashed line indicates the presence or absence of a π bond. R 1 R represents a hydroxyl group or an acetoxy group. 2 R represents a hydrogen atom, or a -COOR group (where R is a hydrogen atom, a methyl group, or an ethyl group). 3 (This represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group.) (B) Neutral or anionic direct dyes (C) Alkaline agent (D) Nonionic surfactant The composition contains the above, and the ratio of the mass content of component (D) to the mass content of component (B), (D) / (B), is 3.0 or more and 30.0 or less, and the pH is 8.0 or more and 11.0 or less. In the following description, a one-part hair dye composition may be simply referred to as "composition".

[0010] The one-component hair dye composition of the present invention, having the above-described structure, allows for the stable blending of a predetermined melanin precursor and a specific direct dye. As a result, it is possible to provide a one-component hair dye composition that enables a wide range of hair color expression and also provides a good feel for the hair after treatment. [Definition] In this specification, "ability to achieve a wide range of color expression" means that, by stably combining a predetermined melanin precursor with a specific direct dye, it is possible to produce colors that would be difficult to achieve with the predetermined melanin precursor alone.

[0011] The reason why the composition of the present invention produces the above effects is not clear, but it is presumed to be as follows. Component (B) contributes to the diverse color expression of hair. Component (C) has the effect of swelling the hair and opening the cuticle, allowing dyeing components such as components (A) and (B) to penetrate deep into the hair, as well as promoting the polymerization reaction of component (A) and improving the hair dyeing properties. Component (D) contributes to the stable formulation of dyeing components such as components (A) and (B). If the amount of component (D) is too small, the stability of components (A) and (B) decreases and aggregates form. On the other hand, if the amount of component (D) is too large, the feel of the hair after treatment tends to deteriorate. Therefore, by setting the ratio of the mass content of component (D) to the mass content of component (B) [(D) / (B)] within a specific range, components (A) and (B) can be stably formulated while allowing component (E) to contribute to improving the feel of the hair. As a result, a one-component hair dye composition can be provided that enables diverse hair color expression and provides a good feel for the hair after treatment. Furthermore, although the dyeing ability tends to decrease if the amount of component (E) is too large, by setting the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] within a specific range, even better dyeing ability and color expression can be achieved.

[0012] In the present invention, examples of the single-agent type hair dyeing material composition include hair cleaning agents such as shampoos, rinses, conditioning agents, treatment agents, styling agents, hair dyes, hair growth agents, and the like. Among these, hair cosmetics selected from the group consisting of rinses, conditioning agents, and treatment agents are preferred. The dosage form of the single-agent type hair dyeing material composition is not particularly limited, and for example, it can be in any dosage form such as liquid, foamy, paste, cream, solid, powder, etc. From the viewpoint of the applicability to hair, it is preferably in a liquid, foamy, paste or cream form.

[0013] <Component (A)> The single-agent type hair dyeing material composition of the present invention contains component (A) which is a compound represented by the following formula (1) or a salt thereof. Component (A) is a melanin precursor that polymerizes by air oxidation and is converted into a melanin pigment, and acts as a hair dye.

Chemical formula

[0014] The compounds represented by formula (1) include 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, methyl 5,6-dihydroxyindole-2-carboxylic acid, ethyl 5,6-dihydroxyindole-2-carboxylic acid, N-methyl-5,6-dihydroxyindole, N-methyl-5,6-dihydroxyindole-2-carboxylic acid, N-ethyl-5,6-dihydroxyindole, N-ethyl-5,6-dihydroxyindole-2-carboxylic acid, N-acetyl-5,6-dihydroxyindole, N-acetyl-5,6-dihydroxyindole-2-carboxylic acid, 5-acetoxy-6-hydroxyindole, 5-acetoxy-6-hydroxyindole-2- Examples include carboxylic acids, 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, methyl 5,6-dihydroxyindoline-2-carboxylic acid, ethyl 5,6-dihydroxyindoline-2-carboxylic acid, N-methyl-5,6-dihydroxyindoline, N-methyl-5,6-dihydroxyindoline-2-carboxylic acid, N-ethyl-5,6-dihydroxyindoline, N-ethyl-5,6-dihydroxyindoline-2-carboxylic acid, N-acetyl-5,6-dihydroxyindoline, N-acetyl-5,6-dihydroxyindoline-2-carboxylic acid, 5-acetoxy-6-hydroxyindoline, and 5-acetoxy-6-hydroxyindoline-2-carboxylic acid.

[0015] Examples of salts of the compound represented by formula (1) include hydrochloride, hydrobromide, sulfate, phosphate, acetate, propionate, lactate, and citrate of the compound, among which hydrobromide is preferred from the viewpoint of availability. Also, in equation (1), R 2 When is -COOH, the salt of the compound represented by formula (1) is its carboxylate salt (R 2 ga-COO - X + (X + Na + , K +Examples include alkali metal ions and cations such as ammonium ions.

[0016] From the viewpoint of improving hair dyeability and dyeing hair to a natural color, it is preferable that component (A) contains one or more selected from the group consisting of 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and salts thereof; more preferably, it contains one or more selected from the group consisting of 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, and 5,6-dihydroxyindoline hydrobromide; and even more preferably, it contains one or more selected from the group consisting of 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid. When using 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid in combination, the molar ratio (5,6-dihydroxyindole:5,6-dihydroxyindole-2-carboxylic acid) is preferably in the range of 50:50 to 99:1, more preferably in the range of 80:20 to 99:1, and even more preferably in the range of 85:15 to 95:5. When the molar ratio of 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid is within the above range, the dyeing performance is improved, and the finished hair color after dyeing is closer to a natural color. The molar ratio of 5,6-dihydroxyindole to 5,6-dihydroxyindole-2-carboxylic acid can be quantified by reverse-phase HPLC.

[0017] The content of component (A) in the one-part hair dye composition is preferably 0.05% by mass or more, more preferably 0.07% by mass or more, even more preferably 0.10% by mass or more, and even more preferably 0.20% by mass or more, from the viewpoint of improving dyeability, and from the viewpoint of expressing a wide range of hair colors, it is preferably 0.50% by mass or less, more preferably 0.45% by mass or less, even more preferably 0.40% by mass or less, and even more preferably 0.35% by mass or less. Furthermore, the content of component (A) in the one-part hair dye composition is preferably 0.05 to 0.50% by mass, more preferably 0.07 to 0.45% by mass, even more preferably 0.10 to 0.40% by mass, and even more preferably 0.20 to 0.35% by mass.

[0018] <Ingredient (B)> The one-component hair dye composition of the present invention contains a neutral or anionic direct dye as component (B). Examples of neutral dyes include HC Blue 2, HC Blue 4, HC Blue 5, HC Blue 6, HC Blue 7, HC Blue 8, HC Blue 9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Brown 1, HC Brown 2, HC Green 1, HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 5, HC Red BN, HC Red 1, HC. Red 3, HC Red 7, HC Red 8, HC Red 9, HC Red 10, HC Red 11, HC Red 13, HC Red 54, HC Red 14, HC Purple BS, HC Purple 1, HC Purple 2, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 7, HC Yellow 8, HC Yellow 9, HC Yellow 10, HC Yellow 11, HC Yellow 12, HC Examples include Yellow 13, HC Yellow 14, HC Yellow 15, 2-amino-6-chloro-4-nitrophenol, picramic acid, 1,2-diamino-4-nitrobenzene, 1,4-diamino-2-nitrobenzene, 3-nitro-4-aminophenol, 1-hydroxy-2-amino-3-nitrobenzene, 2-hydroxyethylpicramic acid, 3-nitro-p-hydroxyethylaminophenol, 4-hydroxypropylamino-3-nitrophenol, and N,N-bis(2-hydroxyethyl)-2'-nitro-p-phenylenediamine. Examples of anionic dyes include Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 2, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, Acid Red 92, Red 106, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, Acid Violet 49, and Violet 4 Examples include 01, Acid Yellow 1, Acid Yellow 23, Acid Yellow 3, Food Yellow 8, Acid Orange 24, Acid Green 25, Solvent Green 7, Solvent Red 73, Acid Red 95, Solvent Red 43, Solvent Red 48, Acid Red 33, Solvent Violet 13, Acid Yellow 73, Yellow 203, Food Red 17, Food Red 1, Food Yellow 3, Food Blue 2, Food Black 1, Food Black 2, Dispersed Black 9, Dispersed Violet 1, and their alkali metal salts (sodium salts and potassium salts). Of these, from the viewpoint of dyeing properties, it is preferable to include one or more selected from the group consisting of 2-amino-6-chloro-4-nitrophenol, 4-hydroxypropylamino-3-nitrophenol, Red 106, Violet 401, and Yellow 203.

[0019] Component (B) can be used alone or in combination of two or more. From the viewpoint of obtaining sufficient dyeing properties, the content of component (B) in the one-part hair dye composition is preferably 0.03% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, even more preferably 0.10% by mass or more, and even more preferably 0.15% by mass or more. From the viewpoint of the storage stability of the composition, it is preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 10% by mass or less, even more preferably 5.0% by mass or less, even more preferably 3.0% by mass or less, even more preferably 1.0% by mass or less, and even more preferably 0.5% by mass or less. Furthermore, the content of component (B) in the one-component hair dye composition is preferably 0.03 to 30% by mass, more preferably 0.05 to 20% by mass, even more preferably 0.08 to 10% by mass, even more preferably 0.10 to 5.0% by mass, even more preferably 0.15 to 3.0% by mass or less, even more preferably 0.15 to 1.0% by mass or less, and even more preferably 0.15 to 0.5% by mass.

[0020] <Ingredient (C)> The one-component hair dye composition of the present invention contains an alkaline agent as component (C). Component (C) can be any alkaline agent commonly used in hair dyes without any particular limitations. Examples of component (C) include ammonia; alkanolamines such as mono-, di-, or triethanolamine; alkylamines such as methylamine, dimethylamine, ethylamine, diethylamine, N-methylethylamine, propylamine, and butylamine; aralkylamines such as benzylamine; and inorganic alkali compounds such as sodium hydroxide and potassium hydroxide. One or more of these can be used. From the viewpoint of water solubility, the number of carbon atoms in the alkanolamine, alkylamine, or aralkylamine is preferably 10 or less, more preferably 8 or less. In particular, from the viewpoint of hair dyeing properties, the alkaline agent preferably contains one or more selected from the group consisting of ammonia, alkanolamines, alkylamines, aralkylamines, sodium hydroxide, and potassium hydroxide; more preferably contains one or more selected from the group consisting of ammonia and alkanolamines; even more preferably contains monoalkanolamines; and still more preferably contains monoethanolamines.

[0021] The content of component (C) in the one-part hair dye composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of improving dyeability and providing an excellent feel to the hair, and from the viewpoint of suppressing irritation, it is preferably 10% by mass or less, more preferably 7.5% by mass or less, even more preferably 5.0% by mass or less, and even more preferably 3% by mass or less. Furthermore, the content of component (C) in the one-part hair dye composition is preferably 0.01 to 10% by mass, more preferably 0.1 to 7.5% by mass, even more preferably 0.5 to 5.0% by mass, and even more preferably 1 to 3% by mass.

[0022] <Ingredient (D)> The one-component hair dye composition of the present invention contains a nonionic surfactant as component (D). From the viewpoint of formulation stability, examples of component (D) include polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, polyoxyalkylene fatty acid esters, higher fatty acid sucrose esters, polyglycerin fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, alkyl saccharides, alkylamine oxides, alkylamidoamine oxides, etc. Among these, it is preferable to contain one or more selected from the group consisting of polyoxyalkylene alkyl ethers, polyoxyethylene hydrogenated castor oil, and alkyl saccharides, and it is more preferable to contain polyoxyethylene alkyl ethers. The polyoxyethylene alkyl ether preferably contains one represented by the following formula (2). R 4 -O-(A a O) r -H ···(2) (In formula (2), R 4 A represents a linear or branched saturated or unsaturated hydrocarbon group having 8 to 22 carbon atoms. a (where represents an ethylene group, and r represents an average value between 1 and 300.)

[0023] R 4 From the viewpoint of formulation stability, the number of carbon atoms is preferably 10 to 22, more preferably 12 to 20, and even more preferably 12 to 18. r is the so-called average number of moles added, preferably 1 to 300, more preferably 2 to 200, even more preferably 2 to 100, and even more preferably 2 to 50.

[0024] Among such polyoxyethylene alkyl ethers, it is preferable to include one represented by the following formula (2a) or (2b).

[0025] R 4 -O-(A a O)qH ···(2a) (In formula (2a), R 4 From the viewpoint of formulation stability, it is preferably 10 to 22, more preferably 12 to 20, and even more preferably 12 to 18 linear saturated hydrocarbon groups, A a represents an ethylene group, and q is an average value preferably 1 to 300, more preferably 2 to 200, even more preferably 2 to 100, and even more preferably 2 to 50.) In formula (2a), q represents the so-called average number of added moles.

[0026] [ka]

[0027] (In equation (2b), the sum of m and n is between 9 and 11, and p represents a number between 3 and 15.) Note that in equation (2b), p represents the so-called average number of added moles.

[0028] More specifically, examples of such polyoxyethylene alkyl ethers include polyoxyethylene lauryl ether, polyoxyethylene myristyl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, and polyoxyethylene behenyl ether. Among these, from the viewpoint of formulation stability, it is preferable to contain one or more selected from polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, and polyoxyethylene behenyl ether, and it is more preferable to contain polyoxyethylene cetyl ether.

[0029] The content of component (D) in the one-part hair dye composition is preferably 0.50% by mass or more, more preferably 0.70% by mass or more, even more preferably 0.90% by mass or more, even more preferably 1.1% by mass or more, and even more preferably 1.3% by mass or more, from the viewpoint of formulation stability and providing an excellent feel to the hair. Furthermore, from the viewpoint of suppressing a decrease in the feel of the hair after treatment, it is preferably 10% by mass or less, more preferably 7.0% by mass or less, even more preferably 6.0% by mass or less, even more preferably 5.0% by mass or less, and even more preferably 4.5% by mass or less. The content of component (D) in the one-part hair dye composition is preferably 0.50 to 10% by mass, more preferably 0.70 to 7.0% by mass, even more preferably 0.90 to 6.0% by mass, even more preferably 1.1 to 5.0% by mass, and even more preferably 1.3 to 4.5% by mass.

[0030] In a one-component hair dye composition, the ratio of the mass content of component (D) to the mass content of component (B) [(D) / (B)] is 3.0 or higher, preferably 3.5 or higher, more preferably 3.7 or higher, even more preferably 5.0 or higher, and even more preferably 6.0 or higher, and also 30.0 or lower, preferably 29.0 or lower, more preferably 25.0 or lower, even more preferably 23.0 or lower, and even more preferably 21.0 or lower. Furthermore, in the one-component hair dye composition, the ratio of the mass content of component (D) to the mass content of component (B) [(D) / (B)] is 3.0 or more and 30.0 or less, preferably 3.5 to 29.0, more preferably 3.7 to 25.0, even more preferably 5.0 to 23.0, and even more preferably 6.0 to 21.0.

[0031] <Ingredient (E)> The one-component hair dye composition of the present invention contains a cationic surfactant as component (E). Examples of component (E) include mono or di-long-chain alkyl quaternary ammonium salts represented by the following formula (3). [ka] (In formula (3), R 5 R is a linear or branched alkyl group having 8 to 22 carbon atoms. 9 CONH(CH2) m -, R 9 COO(CH2) m -(R 9 ) or R 10 -O-(CH2) m -(R 10 ) represents a linear or branched alkyl group with 8 to 22 carbon atoms, and m represents a number between 1 and 4. 6 is a linear or branched alkyl group having 1 to 22 carbon atoms, or the R 9 CONH(CH2) m -, R 9 COO(CH2) m - or R 10 -O-(CH2) m - indicates a group represented by R 7 and R 8 Each of these independently represents an alkyl group having 1 to 4 carbon atoms, Y - (This represents chloride ions, bromide ions, or methosulfate ions.)

[0032] In the above formula (3), from the viewpoint of providing a good feel to the hair, preferably, R 5 is a linear or branched alkyl group with 8 to 22 carbon atoms or R 10 -O-(CH2) m -(R 10 R represents a linear or branched alkyl group with 8 to 22 carbon atoms, and m represents a number between 1 and 4. 6 is a linear or branched alkyl group having 1 to 22 carbon atoms or the aforementioned R 10 -O-(CH2) m - is a group represented by R 7 and R 8 Each of these is an alkyl group having 1 to 4 carbon atoms, and Y - It is a chloride ion.

[0033] R 5 In this context, the number of carbon atoms in the linear or branched alkyl group is 8 to 22, and from the viewpoint of providing an excellent feel to the hair, it is preferably 8 to 18. R 6 In the case of monolong-chain alkylquaternary ammonium salts, the number of carbon atoms in the linear or branched alkyl group having 1 to 22 carbon atoms is preferably 1 to 4, more preferably 1 to 3, from the viewpoint of availability and economy, and preferably 8 to 22, more preferably 8 to 18, from the viewpoint of dilong-chain alkylquaternary ammonium salts. R 7 and R 8 Each of these is independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and from the viewpoint of availability and cost-effectiveness, a methyl group is preferred. R 9 In this context, the number of carbon atoms in the linear or branched alkyl group is 7 to 21, and from the viewpoint of providing an excellent feel to the hair, it is preferably 7 to 19.

[0034] As a specific example of a cationic surfactant, from the viewpoint of providing an excellent feel to the hair, it is preferable to contain one or more selected from the group consisting of monoalkyltrimethylammonium chloride, dialkyldimethylammonium chloride, monoalkyloxyalkyltrimethylammonium chloride, and monoalkyltrimethylammonium bromide. More preferably, it is preferable to contain one or more selected from the group consisting of behenyltrimethylammonium chloride, stearyltrimethylammonium chloride (steartrimonium chloride), cetyltrimethylammonium chloride (cetrimonium chloride), lauryltrimethylammonium chloride (lauryltrimonium chloride), dialkyl(C12~C18)dimethylammonium chloride, and octadecyloxypropyltrimethylammonium chloride, and even more preferably, it is preferable to contain stearyltrimethylammonium chloride (steartrimonium chloride).

[0035] The content of component (E) in the one-part hair dye composition is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, even more preferably 0.20% by mass or more, even more preferably 0.40% by mass or more, even more preferably 0.50% by mass or more, and even more preferably 0.70% by mass or more, and from the viewpoint of suppressing a decrease in the feel of the hair after treatment, it is preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 2% by mass or less, and even more preferably 1% by mass or less. Furthermore, the content of component (E) in the one-part hair dye composition is preferably 0.01 to 10% by mass, more preferably 0.05 to 5% by mass, even more preferably 0.10 to 2% by mass, even more preferably 0.20 to 2% by mass, even more preferably 0.40 to 2% by mass, even more preferably 0.50 to 2% by mass, and even more preferably 0.70 to 1% by mass.

[0036] In a one-component hair dye composition, the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] is preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, and also preferably 30 or less, more preferably 25 or less, more preferably 20 or less, more preferably 15 or less, even more preferably 9 or less, and even more preferably 5 or less. Furthermore, in a one-component hair dye composition, the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] is preferably 1 to 30, more preferably 1 to 25, more preferably 1 to 20, more preferably 1 to 15, even more preferably 2 to 9, and even more preferably 3 to 5.

[0037] In a one-component hair dye composition, the ratio of the mass content of component (E) to the total mass content of component (A) and component (B) [(E) / {(A)+(B)}] is preferably 0.1 or higher, more preferably 0.5 or higher, even more preferably 1 or higher, and even more preferably 1.5 or higher, and also preferably 10 or lower, more preferably 7 or lower, even more preferably 4 or lower, and even more preferably 2 or lower. Furthermore, in a one-component hair dye composition, the ratio of the mass content of component (E) to the total mass content of component (A) and component (B) [(E) / {(A)+(B)}] is preferably 0.1 to 10, more preferably 0.5 to 7, even more preferably 1 to 4, and even more preferably 1.5 to 2.

[0038] (Antioxidant) From the viewpoint of suppressing the polymerization of component (A) outside the hair, it is preferable that the one-part hair dye composition further contains an antioxidant. Examples of antioxidants include sulfite, ascorbic acid, thioglycolic acid, L-cysteine, N-acetyl-L-cysteine, and their salts. From the viewpoint of stabilizing component (A) and improving dyeability, it is preferable to contain one or more selected from the group consisting of sulfite and its salts, and ascorbic acid and its salts, more preferably one or more selected from the group consisting of sodium sulfite and ascorbic acid, and even more preferably both sodium sulfite and ascorbic acid. If the one-component hair dye composition contains an antioxidant, its content is preferably 0.010% by mass or more, more preferably 0.050% by mass or more, even more preferably 0.10% by mass or more, even more preferably 0.20% by mass or more, even more preferably 0.30% by mass or more, even more preferably 0.50% by mass or more, and also preferably 3.0% by mass or less, more preferably 2.0% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.2% by mass or less, and even more preferably 1.1% by mass or less, from the viewpoint of suppressing polymerization of component (A) outside the hair.

[0039] <Ingredients (F)> The one-component hair dye composition of the present invention preferably further contains a higher alcohol as component (F). When the one-component hair dye composition is a hair cosmetic selected from the group consisting of rinses, conditioning agents, and treatment agents, emulsification stability is improved, and when it is a hair cleansing agent, foaming is improved, among other effects. As for higher alcohols, the general formula is R 11 -OH(in the formula, R 11 R represents a straight-chain or branched-chain hydrocarbon group having 12 to 24 carbon atoms. 11 From the viewpoint of improving emulsification stability and foaming, the carbon atoms are preferably linear or branched aliphatic hydrocarbon groups having 12 to 24 carbon atoms, more preferably linear or branched alkyl groups having 12 to 24 carbon atoms, or linear or branched alkenyl groups having 12 to 24 carbon atoms, and even more preferably linear alkyl groups having 12 to 24 carbon atoms, or linear alkenyl groups having 12 to 24 carbon atoms. Examples of higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, arachidyl alcohol, behenyl alcohol, carnabyl alcohol, and oleyl alcohol. One or more higher alcohols can be used in combination. In particular, from the viewpoint of improving emulsification stability and foaming, it is preferable to include one or more alcohols selected from the group consisting of stearyl alcohol and behenyl alcohol, more preferably to include stearyl alcohol and behenyl alcohol, and even more preferably to include stearyl alcohol and behenyl alcohol.

[0040] When a one-component hair dye composition contains component (F), its content is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, even more preferably 4.0% by mass or more, even more preferably 5.0% by mass or more, and also preferably 15% by mass or less, more preferably 12% by mass or less, even more preferably 10% by mass or less, even more preferably 8% by mass or less, and even more preferably 7% by mass or less. Furthermore, when a one-component hair dye composition contains component (F), its content is preferably 0.5 to 15% by mass, more preferably 1.0 to 12% by mass, even more preferably 2.0 to 10% by mass or less, even more preferably 4.0 to 8% by mass, and even more preferably 4.0 to 7% by mass.

[0041] In a one-component hair dye composition, the ratio of the mass content of component (F) to the total mass content of components (D) and (E) [(F) / {(D)+(E)}] is preferably greater than 0.6, more preferably 0.7 or more, even more preferably 0.8 or more, even more preferably 1.0 or more, even more preferably 1.2 or more, and even more preferably 1.3 or more, and from the viewpoint of providing an excellent feel to the hair, it is preferably less than 3.9, more preferably 3.7 or less, even more preferably 3.5 or less, even more preferably 3.2 or less, even more preferably 3.0 or less, even more preferably 2.5 or less, and even more preferably 2.1 or less. Furthermore, in the one-component hair dye composition, the ratio of the content of component (F) to the total content of components (D) and (E) [(F) / {(D)+(E)}] is preferably greater than 0.6 and less than 3.9, more preferably 0.7 to 3.7, even more preferably 0.8 to 3.5, even more preferably 1.0 to 3.2, even more preferably 1.2 to 3.0, even more preferably 1.3 to 2.5, and even more preferably 1.3 to 2.1.

[0042] <Other ingredients> The one-component hair dye composition of the present invention may, in addition to the above-mentioned components, appropriately contain components commonly used in one-component hair dye compositions, to the extent that they do not impair the purpose of the present invention. Examples of such components include surfactants other than nonionic and cationic surfactants, oils, pH adjusters, dyes other than components (A) and (B), aqueous media, polymers, aromatic alcohols, anti-dandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, humectants, pearlescent agents, ceramides, fragrances, ultraviolet absorbers, and the like.

[0043] <Surfactants other than nonionic and cationic surfactants> The one-component hair dye composition of the present invention may further contain surfactants other than nonionic surfactants and cationic surfactants. Examples of such surfactants include amphoteric surfactants and anionic surfactants.

[0044] (Anionic surfactant) Examples of anionic surfactants include alkylbenzene sulfonates, alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, olefin sulfonates, alkanesulfonates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, α-sulfo fatty acid salts, N-acyl amino acids, phosphate mono or diesters, sulfosuccinates, etc., and one or more of these can be used. Examples of counterions for the anionic group of anionic surfactants include alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; and alkanolamines having 1 to 3 alkanol groups with 2 or 3 carbon atoms (e.g., monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, etc.). When a one-component hair dye composition contains an anionic surfactant, its content is preferably 3% by mass or more, more preferably 5% by mass or more, and even more preferably 8% by mass or more, from the viewpoint of good lathering and ease of washing when the one-component hair dye composition is a hair cleanser. Furthermore, from the viewpoint of improving dyeability and suppressing hair damage, it is preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 20% by mass or less, and even more preferably 15% by mass or less. And when a one-component hair dye composition contains an anionic surfactant, its content is preferably 3 to 40% by mass, more preferably 5 to 30% by mass, even more preferably 8 to 20% by mass, and even more preferably 8 to 15% by mass.

[0045] (Amphoteric surfactant) Examples of amphoteric surfactants include betaine-based surfactants such as alkyldimethylaminoacetic acid betaine, fatty acid amidopropyl betaine, and alkyl hydroxysulfobetaine; and sultaine-based surfactants such as lauryl hydroxysultaine. When a one-component hair dye composition contains an amphoteric surfactant, its content is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.15% by mass or more, preferably 15% by mass or less, more preferably 12% by mass or less, and even more preferably 10% by mass or less, from the viewpoint of ease of application to hair and good foaming. Furthermore, when a one-component hair dye composition contains an amphoteric surfactant, its content is preferably 0.05 to 15% by mass, more preferably 0.1 to 12% by mass, and even more preferably 0.15 to 10% by mass.

[0046] (Oil-based) The one-component hair dye composition of the present invention may contain an oil to improve the feel of the hair. Examples of oils include hydrocarbons such as squalene, squalane, liquid paraffin, liquid isoparaffin, and cycloparaffin; glycerides such as castor oil, cocoa oil, mink oil, avocado oil, and olive oil; waxes such as beeswax, whale wax, lanolin, and carnauba wax; esters such as isopropyl palmitate, isopropyl myristate, octyldodecyl myristate, hexyl laurate, cetyl lactate, propylene glycol monostearate, oleyl oleate, hexadecyl 2-ethylhexanoate, isononyl isononanoate, and tridecyl isononanoate; higher fatty acids such as capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, coconut oil fatty acid, isostearyl acid, and isopalmitic acid; and others such as isostearyl glyceryl ether and polyoxypropylene butyl ether. Oils can be used individually or in combination of two or more types.

[0047] When a one-component hair dye composition contains an oil, its content is preferably 0.2% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more, from the viewpoint of improving the feel of the hair, and preferably 10% by mass or less, more preferably 8% by mass or less, and even more preferably 5% by mass or less, from the viewpoint of suppressing a decrease in the feel of the hair. Furthermore, when a one-component hair dye composition contains an oil, its content is preferably 0.2 to 10% by mass, more preferably 0.3 to 8% by mass, and even more preferably 0.5 to 5% by mass.

[0048] (pH adjuster) The one-component hair dye composition of the present invention may contain a pH adjuster to improve dyeability by adjusting the pH to the optimal range for polymerization of component (A). A protonating agent is preferred as the pH adjuster. The protonating agent may be either a monobasic acid or a polybasic acid, and may be either an organic acid (having 1 to 8 carbon atoms, excluding ascorbic acid) or an inorganic acid. Examples of the protonating agent include one or more selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, and citric acid, with one or more selected from the group consisting of phosphoric acid and citric acid being more preferred.

[0049] When using a pH adjuster, there are no particular restrictions on its content as long as the pH of the one-component hair dye composition can be adjusted to 8.0 or higher and 11.0 or lower, but it is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more. Furthermore, from the viewpoint of formulation stability, it is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, and even more preferably 3.5% by mass or less.

[0050] (Staining agents other than components (A) and (B)) The one-component hair dye composition of the present invention may further contain dyes other than components (A) and (B). Examples of such dyes include oxidation dyes (composed of a precursor and a coupler) commonly used in hair dyes. The above-mentioned dyes other than components (A) and (B) may be used individually or in combination of two or more types. When using such dyes, it is preferable that they contain an oxidation dye. Preferred precursors include paraphenylenediamine, toluene-2,5-diamine, para-aminophenol, 4-aminomethacresol, 1-hydroxyethyl-4,5-diaminopyrazole, and their salts. Preferred couplers include 2,4-diaminophenoxyethanol, meta-aminophenol, 2-methyl-5-aminophenol [=5-amino-orthocresol], resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 1-naphthol, 2-amino-3-hydroxypyridine, 2-amino-4-(β-hydroxyethyl)aminoanisole, and their salts.

[0051] When using dyes other than components (A) and (B), their content is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.05% by mass or more, preferably 1% by mass or less, and more preferably 0.5% by mass or less, in the one-component hair dye composition.

[0052] (aqueous medium) One-part hair dye compositions typically contain an aqueous medium. Examples of aqueous media include water; lower alcohols such as ethanol and isopropyl alcohol; and low molecular weight diols and triols with 6 or fewer carbon atoms, such as 1,3-butylene glycol, glycerin, ethylene glycol, and propylene glycol, with water being preferred. The content of the aqueous medium in a one-part hair dye composition can be appropriately selected depending on the dosage form of the one-part hair dye composition, but is usually in the range of 1 to 95% by mass. When water is used as the aqueous medium, from the viewpoint of increasing the adhesion of the composition to the hair due to the viscosity of the composition and allowing components (A) and (B) to penetrate the hair and exhibit high dyeing performance, the water content in the one-part hair dye composition is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and also preferably 95% by mass or less, more preferably 90% by mass or less. Furthermore, the water content in the one-component hair dye composition is preferably 50-95% by mass, more preferably 60-95% by mass, and even more preferably 70-90% by mass.

[0053] <ph> The pH of the one-component hair dye composition of the present invention is 8.0 or higher, preferably 8.5 or higher, and more preferably 9.0 or higher, from the viewpoint of improving dyeability. This is because component (A), which is a melanin precursor, reacts with oxygen in the air under basic conditions and is easily converted into melanin pigment. The pH is 11.0 or lower, and more preferably 10.5 or lower, from the viewpoint of improving dyeability and suppressing damage to the hair. The above pH values ​​were measured at 25°C and can be specifically measured by the method described in the examples.

[0054] The method for producing the one-component hair dye composition of the present invention is not particularly limited. For example, it can be produced by blending components (A) to (D) and other components as needed using the method described in the examples and mixing them using a known stirring device or the like.

[0055] The one-component hair dye composition of the present invention may be filled into an oxygen-barrier container. The container may be for aerosol use or not.

[0056] The one-component hair dye composition of the present invention can dye hair by being applied to the hair. One method of dyeing hair is to apply the one-component hair dye composition to the hair and wash it off as needed, and repeat this process on a daily basis. Through such daily hair care, gray hair and other types of hair can be easily dyed.

[0057] With regard to the embodiments described above, the present invention further discloses the following. [1] The following components (A) to (E): (A) Compounds represented by the following formula (1) or salts thereof [ka] (In equation (1), the dashed line indicates the presence or absence of a π bond. R 1 R represents a hydroxyl group or an acetoxy group. 2 R represents a hydrogen atom, or a -COOR group (where R is a hydrogen atom, a methyl group, or an ethyl group). 3 (This represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group.) (B) Neutral or anionic direct dyes (C) Alkaline agent (D) Nonionic surfactant (E) Cationic surfactant A one-component hair dye composition containing the above, wherein the ratio (D) / (B) of the mass content of component (D) to the mass content of component (B) is 3.0 or more and 30.0 or less, and the pH is 8.0 or more and 11.0 or less. [2] The one-component hair dye composition of [1] above, preferably contains one or more selected from the group consisting of 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and salts thereof as component (A), more preferably contains one or more selected from the group consisting of 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, and 5,6-dihydroxyindoline hydrobromide, and even more preferably contains one or more selected from the group consisting of 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid. [3] The one-component hair dye composition according to [1] or [2] above, wherein the content of component (A) in the one-component hair dye composition is preferably 0.05 to 0.50% by mass, more preferably 0.07 to 0.45% by mass, even more preferably 0.10 to 0.40% by mass, and even more preferably 0.20 to 0.35% by mass. [4] A one-component hair dye composition according to any one of [1] to [3] above, wherein component (B) preferably contains one or more selected from the group consisting of 2-amino-6-chloro-4-nitrophenol, 4-hydroxypropylamino-3-nitrophenol, Red 106, Violet 401, and Yellow 203. [5] A one-component hair dye composition according to any one of [1] to [4] above, wherein the content of component (B) in the one-component hair dye composition is preferably 0.03 to 30% by mass, more preferably 0.05 to 20% by mass, even more preferably 0.08 to 10% by mass, even more preferably 0.10 to 5.0% by mass, even more preferably 0.15 to 3.0% by mass or less, even more preferably 0.15 to 1.0% by mass or less, and even more preferably 0.15 to 0.5% by mass.

[0058] [6] A one-component hair dye composition according to any one of the above [1] to [5], wherein component (C) preferably contains one or more selected from the group consisting of ammonia, alkanolamine, alkylamine, aralkylamine, sodium hydroxide, and potassium hydroxide, more preferably contains one or more selected from the group consisting of ammonia and alkanolamine, and even more preferably contains a monoalkanolamine, and contains monoethanolamine. [7] A one-component hair dye composition according to any one of [1] to [6] above, wherein the content of component (C) in the one-component hair dye composition is preferably 0.01 to 10% by mass, more preferably 0.1 to 7.5% by mass, even more preferably 0.5 to 5.0% by mass, and even more preferably 1 to 3% by mass. [8] A one-component hair dye composition according to any one of [1] to [7] above, wherein component (D) preferably contains one or more selected from the group consisting of polyoxyalkylene alkyl ether, polyoxyethylene hydrogenated castor oil, and alkyl saccharide, and more preferably contains polyoxyethylene alkyl ether. [9] A one-component hair dye composition according to any one of [1] to [8] above, wherein the content of component (D) in the one-component hair dye composition is preferably 0.50 to 10% by mass, more preferably 0.70 to 7.0% by mass, even more preferably 0.90 to 6.0% by mass, even more preferably 1.1 to 5.0% by mass, and even more preferably 1.3 to 4.5% by mass.

[10] A one-component hair dye composition according to any one of [1] to [9] above, wherein the ratio of the mass content of component (D) to the mass content of component (B) [(D) / (B)] is preferably 3.5 to 29.0, more preferably 3.7 to 25.0, even more preferably 5.0 to 23.0, and even more preferably 6.0 to 21.0.

[0059]

[11] A one-component hair dye composition according to any one of the above [1] to

[10] , wherein component (E) is a mono or di-long-chain alkyl quaternary ammonium salt represented by the following formula (3). [ka] (In formula (3), R 5 R is a linear or branched alkyl group having 8 to 22 carbon atoms. 9 CONH(CH2) m -, R 9 COO(CH2) m -(R 9 ) or R 10 -O-(CH2) m -(R 10 ) represents a linear or branched alkyl group with 8 to 22 carbon atoms, and m represents a number between 1 and 4. 6 is a linear or branched alkyl group having 1 to 22 carbon atoms, or the R 9 CONH(CH2) m -, R 9 COO(CH2) m - or R 10 -O-(CH2) m - indicates a group represented by R 7 and R 8 Each of these independently represents an alkyl group having 1 to 4 carbon atoms, Y - (This represents chloride ions, bromide ions, or methosulfate ions.)

[12] A one-component hair dye composition according to any one of the above [1] to

[10] , wherein component (E) preferably contains one or more selected from the group consisting of monoalkyltrimethylammonium chloride, dialkyldimethylammonium chloride, monoalkyloxyalkyltrimethylammonium chloride, and monoalkyltrimethylammonium bromide, more preferably contains one or more selected from the group consisting of behenyltrimethylammonium chloride, stearyltrimethylammonium chloride (steartrimonium chloride), cetyltrimethylammonium chloride (cetrimonium chloride), lauryltrimethylammonium chloride (lauryltrimonium chloride), dialkyl(C12-C18)dimethylammonium chloride, and octadecyloxypropyltrimethylammonium chloride, and more preferably contains stearyltrimethylammonium chloride (steartrimonium chloride).

[13] A one-component hair dye composition according to any one of [1] to

[12] above, wherein the content of component (E) in the one-component hair dye composition is preferably 0.01 to 10% by mass, more preferably 0.05 to 5% by mass, even more preferably 0.10 to 3% by mass, even more preferably 0.20 to 2% by mass, even more preferably 0.40 to 2% by mass, even more preferably 0.50 to 2% by mass, and even more preferably 0.70 to 1% by mass.

[0060]

[14] A one-component hair dye composition according to any one of the above [1] to

[13] , wherein the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] is preferably 1 to 30, more preferably 1 to 25, more preferably 1 to 20, more preferably 1 to 15, even more preferably 2 to 9, and even more preferably 3 to 5.

[15] A one-component hair dye composition according to any one of [1] to

[14] above, wherein the ratio of the content mass of component (E) to the total content mass of component (A) and component (B) [(E) / {(A)+(B)}] is preferably 0.1 to 10, more preferably 0.5 to 7, even more preferably 1 to 4, and even more preferably 1.5 to 2.

[16] A one-component hair dye composition according to any one of the above [1] to

[15] , further comprising a higher alcohol as component (F), wherein such component (F) preferably contains one or more selected from the group consisting of stearyl alcohol and behenyl alcohol, more preferably contains stearyl alcohol and behenyl alcohol, and even more preferably contains stearyl alcohol and behenyl alcohol.

[17] The one-component hair dye composition according to

[16] above, wherein the content of component (F) in the one-component hair dye composition is preferably 0.5 to 15% by mass, more preferably 1.0 to 12% by mass, even more preferably 2.0 to 10% by mass or less, even more preferably 4.0 to 8% by mass, and even more preferably 4.0 to 7% by mass.

[18] The one-component hair dye composition according to

[16] or

[17] above, wherein the ratio of the content of component (F) to the total content of components (D) and (E) [(F) / {(D)+(E)}] is preferably greater than 0.6 and less than 3.9, more preferably 0.7 to 3.7, even more preferably 0.8 to 3.5, even more preferably 1.0 to 3.2, even more preferably 1.2 to 3.0, even more preferably 1.3 to 2.5, and even more preferably 1.3 to 2.1.

[0061]

[19] A one-component hair dye composition according to any one of [1] to

[18] above, wherein the content of an anionic surfactant in the one-component hair dye composition is preferably 3 to 40% by mass, more preferably 5 to 30% by mass, even more preferably 8 to 20% by mass, and even more preferably 8 to 15% by mass.

[20] A one-component hair dye composition according to any one of [1] to

[19] above, wherein the content of the amphoteric surfactant in the one-component hair dye composition is preferably 0.05 to 15% by mass, more preferably 0.1 to 12% by mass, and even more preferably 0.15 to 10% by mass.

[21] A one-component hair dye composition according to any one of [1] to

[20] above, wherein the oil content in the one-component hair dye composition is preferably 0.2 to 10% by mass, more preferably 0.3 to 8% by mass, and even more preferably 0.5 to 5% by mass.

[22] The content of water in the one-component dyeing wool material composition is preferably 50 to 95% by mass, more preferably 60 to 95% by mass, and still more preferably 70 to 90% by mass, and the one-component dyeing wool material composition according to any one of [1] to

[21] above.

[0062]

[23] The one-component dyeing wool material composition according to any one of [1] to

[22] above, wherein the component (B) contains 2-amino-6-chloro-4-nitrophenol.

[24] The one-component dyeing wool material composition according to any one of [1] to

[22] above, wherein the component (B) contains 2-amino-6-chloro-4-nitrophenol, Red 106, and Violet 401.

[25] The one-component dyeing wool material composition according to any one of [1] to

[24] above, wherein the component (D) contains polyoxyethylene alkyl ether.

[26] The one-component dyeing wool material composition according to any one of [1] to

[25] above, wherein the component (D) contains a polyoxyethylene alkyl ether represented by the following formula (2a). R 4 -O-(A a O)q-H ···(2a) (In the formula (2a), R 4 represents a linear saturated hydrocarbon group having 12 to 22 carbon atoms, A a represents an ethylene group, and q is an average value of 2 to 50.) <00​​​​​​​​​​​​​​​​​​​

[28] A one-component hair dye composition according to any one of the above [1] to

[27] , wherein component (E) is selected from the group consisting of stearyltrimethylammonium chloride (steartrimonium chloride), behenyltrimethylammonium chloride, and cetyltrimethylammonium chloride (cetrimonium chloride).

[29] A one-component hair dye composition according to any one of the above [1] to

[28] , further comprising a higher alcohol as component (F), wherein such component (F) is one or more selected from the group consisting of stearyl alcohol, behenyl alcohol, cetyl alcohol, and oleyl alcohol.

[0063]

[30] A one-part hair dye composition according to any one of the above [1] to

[29] , wherein the content of component (A) in the one-part hair dye composition is 0.2% by mass or more.

[31] A one-part hair dye composition according to any one of the above [1] to

[30] , wherein the content of component (A) in the one-part hair dye composition is 0.5% by mass or less.

[32] A one-part hair dye composition according to any one of the above [1] to

[31] , wherein the content of component (B) in the one-part hair dye composition is 0.1% by mass or more.

[33] A one-part hair dye composition according to any one of the above [1] to

[32] , wherein the content of component (B) in the one-part hair dye composition is 0.5% by mass or less.

[34] A one-part hair dye composition according to any one of the above [1] to

[33] , wherein the content of component (C) in the one-part hair dye composition is 1% by mass or more.

[35] A one-component hair dye composition according to any one of the above [1] to

[34] , wherein the content of component (C) in the one-component hair dye composition is 3% by mass or less.

[36] A one-part hair dye composition according to any one of the above [1] to

[35] , wherein the content of component (D) in the one-part hair dye composition is 1.1% by mass or more.

[37] A one-part hair dye composition according to any one of the above [1] to

[36] , wherein the content of component (D) in the one-part hair dye composition is 5.0% by mass or less.

[38] A one-part hair dye composition according to any one of the above [1] to

[37] , wherein the content of component (E) in the one-part hair dye composition is 0.50% by mass or more.

[39] A one-part hair dye composition according to any one of the above [1] to

[38] , wherein the content of component (E) in the one-part hair dye composition is 2% by mass or less.

[40] A one-part hair dye composition according to any one of the above

[29] to

[39] , wherein the content of component (F) in the one-part hair dye composition is 4.0% by mass or more.

[41] A one-part hair dye composition according to any one of the above

[29] to

[40] , wherein the content of component (F) in the one-part hair dye composition is 7% by mass or less.

[0064]

[42] A one-part hair dye composition according to any one of the above [1] to

[41] , wherein the ratio of the mass content of component (D) to the mass content of component (B) [(D) / (B)] is 3.0 or more.

[43] A one-part hair dye composition according to any one of the above [1] to

[42] , wherein the ratio of the mass content of component (D) to the mass content of component (B) [(D) / (B)] is 30.0 or less.

[44] A one-component hair dye composition according to any one of the above [1] to

[43] , wherein the ratio of the mass content of component (F) to the total mass content of components (D) and (E) [(F) / {(D)+(E)}] is 0.7 or more.

[45] A one-component hair dye composition according to any one of the above [1] to

[44] , wherein the ratio of the mass content of component (F) to the total mass content of components (D) and (E) [(F) / {(D)+(E)}] is 3.7 or less.

[46] A one-component hair dye composition according to any one of the above [1] to

[45] , wherein the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] is 1 or more.

[47] A one-component hair dye composition according to any one of the above [1] to

[45] , wherein the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] is 2 or more.

[48] ​​A one-component hair dye composition according to any one of the above [1] to

[45] , wherein the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] is 3 or more.

[49] A one-component hair dye composition according to any one of the above [1] to

[45] , wherein the ratio of the mass content of component (E) to the mass content of component (B) [(E) / (B)] is 25 or less.

[50] The ratio [(E) / (B)] of the content mass of component (E) to the content mass of component (B) is 20 or less in any one of the above [1] to

[45] one - agent - type hair - dyeing material compositions.

[51] The ratio [(E) / (B)] of the content mass of component (E) to the content mass of component (B) is 15 or less in any one of the above [1] to

[45] one - agent - type hair - dyeing material compositions.

[52] The ratio [(E) / (B)] of the content mass of component (E) to the content mass of component (B) is 9 or less in any one of the above [1] to

[45] one - agent - type hair - dyeing material compositions.

[53] The ratio [(E) / (B)] of the content mass of component (E) to the content mass of component (B) is 5 or less in any one of the above [1] to

[45] one - agent - type hair - dyeing material compositions.

[54] The ratio [(E) / {(A)+(B)}] of the content mass of component (E) to the total content mass of components (A) and (B) is 0.5 or more in any one of the above [1] to

[53] one - agent - type hair - dyeing material compositions.

[55] The ratio [(E) / {(A)+(B)}] of the content mass of component (E) to the total content mass of components (A) and (B) is 7 or less in any one of the above [1] to

[54] one - agent - type hair - dyeing material compositions.

[56] A method for dyeing hair, which comprises repeating the steps of applying any one of the above [1] to

[55] one - agent - type hair - dyeing material compositions to hair and then washing.

Examples

[0065] [[ID=##]] Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the scope of the examples. [[ID=##]] [[ID=##]]

[0066] [[ID=##]] [[ID=##]] <pH measurement>[[ID=##]] Using a pH meter (F - 51, manufactured by Horiba, Ltd.), the pH of the one - agent - type hair - dyeing material composition at 25°C was measured. [[ID=##]]

[0067] [[ID=##]] [Preparation of one - agent - type hair - dyeing material composition (conditioner)] [[ID=##]] Example 1 [[ID=##]] A predetermined amount of 2-amino-6-chloro-4-nitrophenol (component B), 3.0 parts by mass of monoethanolamine (component C), 3.15 parts by mass of a 28% aqueous solution of stearyltrimethylammonium chloride (Cotamin 86W: manufactured by Kao Corporation) (0.88 parts by mass as stearyltrimethylammonium chloride) (component E), purified water, and phosphoric acid were mixed so that the one-part hair dye composition had a pH of 10.2 and a volume of 100 parts by mass. To this aqueous solution, 0.24 parts by mass of polyoxyethylene(2) cetyl ether and 0.53 parts by mass of polyoxyethylene(40) cetyl ether (component D), and 2.2 parts by mass of stearyl alcohol and 2.8 parts by mass of behenyl alcohol (component F) were added to prepare an emulsifier. Furthermore, under a nitrogen atmosphere, 0.6 parts by mass of ascorbic acid, 0.35 parts by mass of sodium sulfite, and 25.0 parts by mass of an aqueous solution containing component (A) (0.25 parts by mass of component (A)) were added to obtain a one-component hair dye composition.

[0068] Examples 2-13, Comparative Examples 1 and 2 The procedure was carried out in the same manner as in Example 1, except that the content of each component was changed as shown in Table 1, to obtain the one-component hair dye compositions of Examples 2 to 13, and Comparative Examples 1 and 2. The pH at 25°C was 10.2 in all cases. The following evaluations were performed using the one-component hair dye compositions of Examples 1 to 13 and Comparative Examples 1 and 2. The results are shown in Tables 1 and 2.

[0069] <Evaluation of one-component hair dye composition (stability)> The stability of the one-part hair dye composition was evaluated by visually observing the presence or absence of precipitates in the composition after spreading 0.1g of the composition onto a glass slide and placing a coverslip on top. The evaluation criteria were as follows. A: No precipitates were observed. B: Precipitates are present but are fine and uniformly dispersed throughout. C: Precipitates are observed and are aggregated and present locally.

[0070] <Evaluation of one-part hair dye composition (tactile evaluation)> For each example, 10g of the one-part hair dye composition obtained was uniformly applied to a 30cm long, 10g mass black human hair strand (Beaulux Co., Ltd. "BS-A" with aligned roots) so that the bath ratio was 1:1 (stretch:one-part hair dye composition), and left for 10 minutes in a 30°C atmosphere. Next, the treated strand was rinsed with warm water for 30 seconds to wash away the one-part hair dye composition, and then towel-dried to adjust the water content to a bath ratio of 1:0.4 (stretch:water).

[0071] The tactile evaluation was conducted after the completion of this series of processes, according to the following criteria. Five expert panelists performed a 5-point rating system based on the criteria below, and the average score of the five panelists was calculated. 5 points: Judged to have good glide. 4 points: Judged to have slightly good glide. 3 points: Judgment that the slipperiness is neither good nor bad. 2 points: Judged to have slightly poor glide. 1 point: Judged to have poor sliding properties.

[0072] <Evaluation of one-component hair dye compositions (ΔC value, L value)> For a 10cm long, 1g gray hair treatment (BM-WA, manufactured by Beaulux Co., Ltd.), 1g of the one-part hair dye composition obtained in each example was uniformly applied to the hair treatment (BM-WA, manufactured by Beaulux Co., Ltd.) in a bath ratio of 1:1 (treatment:one-part hair dye composition), and left for 10 minutes in a 30°C atmosphere. Next, the treated treatment was rinsed with warm water for 30 seconds, then washed with a plain shampoo of the composition shown below for 15 seconds, and rinsed again with warm water for another 15 seconds. After 15 minutes in a 30°C atmosphere, the treatment was dried by applying cool air from a hairdryer for 15 minutes.

[0073] For the dried traces obtained, the saturation (C value) and lightness (L value) were measured at six locations per trace using a colorimeter (Konica Minolta CR-400), and the average values ​​for each were calculated. The saturation (C value) was calculated using the following formula (x), and the obtained C value was introduced into the following formula (y) to find the ΔC value. C value = {(a * ) 2 +(b * ) 2 } 1 / 2 ...(x) ΔC value = (C value of hair dyed with the composition of each example and comparative example) - (C value of hair dyed with a composition containing only DHI as a dye) ... (y)

[0074] (Plain Shampoo) (Percentage by Mass) Sodium polyoxyethylene lauryl ether sulfate (Emal E-27C (active ingredient content: 27% by mass), manufactured by Kao Corporation) 57.4 Lauramide DEA (Aminone L-02, manufactured by Kao Corporation) 1.5 EDTA-2Na (Frost DS, manufactured by Daiichi Chemical Co., Ltd.) 0.3 Appropriate amount of phosphoric acid (adjusted to pH 7.0) Purified water remainder Total 100 To evaluate the ability to express a wide range of colors, a ΔC value of 3.6 or higher was considered a pass (P), an L value of 36 or higher was considered a pass (P), and anything else was considered a fail (F). When both the ΔC value and the L value passed (P), it was evaluated that a wide range of colors had been achieved.

[0075] <Evaluation of one-part hair dye composition (color)> For a 10cm long, 1g gray hair sample (BM-WA, manufactured by Beaulux Co., Ltd.), 1g of the one-part hair dye composition obtained in each example was uniformly applied to the sample in a bath ratio of 1:1 (Tres:one-part hair dye composition), and left for 10 minutes in a 30°C atmosphere. Next, the treated Tres was rinsed with warm water for 30 seconds, then washed for 15 seconds with the plain shampoo used in the "Evaluation of One-Part Hair Dye Composition (ΔC value, L value)" above, and rinsed again with warm water for another 15 seconds. After 15 minutes in a 30°C atmosphere, the Tres was dried by applying cool air from a hairdryer for 15 minutes. The color of the Tres after drying was evaluated by visual observation in accordance with JIS Z 8102.

[0076] [Table 1]

[0077] [Table 2]

[0078] The components (*1 to *16) listed in Tables 1 and 2 are shown below. *1: Solution prepared by the method described in Japanese Patent Publication No. 5570161 (5,6-dihydroxyindole: 1% by mass, 5,6-dihydroxyindole-2-carboxylic acid: 0.14% by mass, ethanol: 20% by mass, water: remainder) *2: 5,6-Dihydroxyindoline hydrobromide (manufactured by SHANGHAI ICHEMICAL TECHNOLOGY CO., LTD.) *3: RODOL 9R BASE (manufactured by Zhejiang Dragon Chemical Co., Ltd.) *4:HC RED BN (manufactured by Zhejiang Dragon Chemical) *5: Red No. 106 (manufactured by Kinsumi Kasei Co., Ltd.) *6: Purple No. 401 (manufactured by Kisumi Kasei Co., Ltd.) *7:Yellow No. 203 (manufactured by Kisumi Kasei Co., Ltd.) *8: Monoethanolamine (manufactured by Petronas Chemicals) *9: Nikkor BC-2 (manufactured by Nikko Chemicals Co., Ltd.) *10: Nikkor BC-40 (manufactured by Nikko Chemicals Co., Ltd.) *11: Cortamin 86W (manufactured by Kao Corporation, active ingredient content: 28% by mass) *12: Calcol 8098 (manufactured by Kao Corporation) *13: Calcol 220-80 (manufactured by Kao Corporation) *14: Ascorbic acid (Japanese Pharmacopoeia Ascorbic Acid, manufactured by Watanabe Chemical Co., Ltd.) *15: Purified anhydrous sodium sulfite (manufactured by Daito Chemical Co., Ltd.) *16: Food additive 75% phosphoric acid (manufactured by Nippon Chemical Industrial Co., Ltd.)

[0079] Tables 1 and 2 show that the one-component hair dye composition of the present invention can stably combine a predetermined melanin precursor and a specific direct dye, resulting in a one-component hair dye composition that enables a wide range of hair color expression and also provides a good feel to the hair after treatment.

[0080] As an example of the formulation of the one-component hair dye composition of the present invention, a one-component hair dye with the composition shown in Table 3 was obtained by the following method.

[0081] Prescription Example 1 (Single-component hair dye) A predetermined amount of 2-amino-6-chloro-4-nitrophenol (component B), monoethanolamine (component C), 1.0 part by mass of a 28% aqueous solution of stearyltrimethylanonium chloride (Cotamin 86W: manufactured by Kao Corporation) (0.28 parts by mass as stearyltrimethylanonium chloride) (component E), purified water, and phosphoric acid were mixed so that the one-part hair dye composition had a pH of 10.2 and a volume of 100 parts by mass. To this aqueous solution, 2.0 parts by mass of polyoxyethylene(2) cetyl ether and 1.9 parts by mass of polyoxyethylene(40) cetyl ether (component D), and 3.0 parts by mass of stearyl alcohol and behenyl alcohol (component F) were added to prepare an emulsifier. Furthermore, under a nitrogen atmosphere, 0.6 parts by mass of ascorbic acid, 0.35 parts by mass of sodium sulfite, and 25.0 parts by mass of an aqueous solution containing component (A) (0.25 parts by mass of component (A)) were added to obtain a one-component hair dye.

[0082] Prescription Example 2 (One-part hair dye) As component (B), 0.2 parts by mass of Red No. 106, 0.12 parts by mass of Purple No. 401, and 0.2 parts by mass of Yellow No. 203; as component (C), 3.0 parts by mass of monoethanolamine; as component (E), 3.14 parts by mass of a 28% aqueous solution of stearyltrimethylanonium chloride (Cotamin 86W: manufactured by Kao Corporation) (0.88 parts by mass as stearyltrimethylanonium chloride); purified water and phosphoric acid were mixed in predetermined amounts so that the one-component hair dye composition had a pH of 10.2 and a volume of 100 parts by mass. To this aqueous solution, 0.91 parts by mass of polyoxyethylene (2) cetyl ether and 2 parts by mass of polyoxyethylene (40) cetyl ether were added as component (D), and 2.2 parts by mass of stearyl alcohol and 2.8 parts by mass of behenyl alcohol were added as component (F) to prepare an emulsifier. Furthermore, 0.6 parts by mass of ascorbic acid, 0.35 parts by mass of sodium sulfite, and 25.0 parts by mass of an aqueous solution containing component (A) (0.25 parts by mass of component (A)) were added under a nitrogen atmosphere to obtain a one-component hair dye. Table 3 shows formulation examples 1 and 2.

[0083] [Table 3]

[0084] The one-component hair dyes of formulation examples 1 and 2 were evaluated for stability and feel in the same manner as in Examples 1 to 13, and all items were found to be satisfactory. In addition, the one-component hair dyes of formulation examples 1 and 2 were evaluated for color in the same manner as in Examples 1 to 13, and formulation example 1 resulted in a strong reddish-yellow color, while formulation example 2 resulted in a dark gray with a yellowish-red tint. [Industrial applicability]

[0085] The present invention provides a one-component hair dye composition that allows for the stable blending of a predetermined melanin precursor and a specific direct dye, resulting in a wide range of hair color expression and a hair that feels good after treatment.< / ph>

Claims

1. The following components (A) to (E): (A) A compound represented by the following formula (1) or a salt thereof 【Chemistry 1】 (In equation (1), the dashed line indicates the presence or absence of a π bond. R 1 R represents a hydroxyl group or an acetoxy group. 2 R represents a hydrogen atom, or -COOR (where R is a hydrogen atom, a methyl group, or an ethyl group). 3 (This represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group.) (B) Neutral or anionic direct dyes (C) Alkaline agent (D) Nonionic surfactants (E) Cationic surfactants A one-component hair dye composition containing the following, wherein the ratio of the mass content of component (D) to the mass content of component (B), (D) / (B), is 3.0 or more and 30.0 or less, and the pH is 8.0 or more and 11.0 or less.

2. The one-component hair dye composition according to claim 1, wherein the ratio (E) / (B) of the mass content of component (E) to the mass content of component (B) is 1 or more and 30 or less.

3. The one-component hair dye composition according to claim 1 or 2, wherein the component (B) is one or more selected from the group consisting of 2-amino-6-chloro-4-nitrophenol, 4-hydroxypropylamino-3-nitrophenol, Red 106, Violet 401, and Yellow 203.

4. Furthermore, the one-component hair dye composition according to claim 1 or 2 contains one or more selected from the group consisting of sodium sulfite and ascorbic acid.

5. The one-component hair dye composition according to claim 1 or 2, wherein the component (C) is monoethanolamine.

6. Furthermore, the one-component hair dye composition according to claim 1 or 2 contains a higher alcohol as component (F).

7. A one-component hair dye composition according to claim 1 or 2, which is filled in an oxygen-barrier container.

8. A method for dyeing hair by applying the one-component hair dye composition described in claim 1 or 2 to the hair.

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