Oxidative hair dye composition

Abstract

To provide an oxidative hair dye composition that contains an ascorbic acid and is used in foamy state, in which contamination of the scalp is reduced while the emulsion stability of a first agent is maintained and excellent bubbles can be formed.SOLUTION: An oxidative hair dye composition contains the following component (A) and component (B), in which a mixture of an oxidation dye-containing first agent and an oxidizer-containing second agent is used in foamy state. The component (A) is an ascorbic acid of 0.1 mass% or more and the component (B) is a cationic surfactant of 0.3 mass% or more.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oxidative hair dye composition that uses a mixture of a first agent containing an oxidative dye and a second agent containing an oxidizing agent in a foamed state.

Background Art

[0002] Oxidative hair dyes are widely used worldwide because they have relatively long-lasting color among various hair colors and excellent hair dyeing power. An oxidative hair dye generally consists of a first agent containing an oxidative dye and an alkaline agent, and a second agent mainly containing hydrogen peroxide as an oxidizing agent. The hair dyeing mechanism of this oxidative hair dye is as follows: First, the cuticle on the hair is opened by the alkaline agent in the first agent, and the first agent and the second agent penetrate into the hair. After penetrating into the hair, the melanin pigment in the hair is decolorized, and at the same time, the oxidative dye in the first agent is oxidized and polymerized by the oxidizing agent to develop color. The developed oxidative dye stays inside the hair, thereby fixing the color on the hair.

[0003] On the other hand, when an oxidative hair dye adheres to the skin such as the scalp or skin, there is a problem that the excellent hair dyeing power also colors the skin. To suppress this, it is known to incorporate a relatively high dose of ascorbic acids into the oxidative hair dye.

[0004] For example, Patent Document 1 discloses a hair cosmetic composition that contains ascorbic acids, can be easily mixed by adjusting the viscosities of the first agent and the second agent, and has good foaming properties and is not likely to drip when applied to the hair.

[0005] Also, Patent Document 2 discloses a hair cosmetic composition that contains ascorbic acids, has appropriate viscosity without dripping, and has good foaming properties and foam persistence.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] Conventional foamy oxidative hair dye compositions containing ascorbic acid did not contain sufficient ascorbic acid to suppress scalp staining. Here, in an oxidative hair dye composition used as a foam, adding enough ascorbic acid to effectively suppress scalp staining presents the problem of poor foaming. Furthermore, changing the surfactant formulation to improve foaming presents the problem of reduced emulsification stability of the first agent.

[0008] Therefore, the object of the present invention is to provide an oxidative hair dye composition containing ascorbic acid compounds that is used in a foamy form, which can suppress scalp staining, maintain the emulsification stability of the first agent, and form a good foam. [Means for solving the problem]

[0009] The inventors of the present invention have diligently studied the above problems and have found that in an oxidative hair dye composition using a mixture of a first agent containing an oxidative dye and a second agent containing an oxidizing agent as a foam, by including ascorbic acid and cationic surfactants under certain conditions, it is possible to suppress scalp staining while maintaining the emulsification stability of the first agent and forming a good quality foam, thus completing the present invention.

[0010] In other words, the present invention provides an oxidative hair dye composition that uses a mixture of a first agent containing the following oxidative dye and a second agent containing an oxidizing agent in the form of a foam. The present invention provides an oxidative hair dye composition to solve the above problems. acid chemical dye and oily componentsAn oxidative hair dye composition in which a mixture of a first agent containing a certain substance and a second agent containing an oxidizing agent is used as a foam. The oxidative hair dye composition contains the following components (A), (B), and (C): (A) L-ascorbic acid no Shiomata ha Sterls 1.0% by mass or more 10.0% by mass or less (B) Cationic surfactant in an amount of 0.3% by mass or more 2.0% by mass or less (C) Higher fatty acids: 0.3% by mass or more, 3.0% by mass or less The first agent further contains (D) a nonionic surfactant with an HLB value of 17 or higher in an amount of 1.2% by mass or more and 2.5% by mass or less; the second agent further contains (D) a nonionic surfactant with an HLB value of 17 or higher and (F) a nonionic surfactant with an HLB value of less than 17; and the second agent contains (D) and (F) such that the total content of (D) and (F) in the mixture of the first agent and the second agent is 0.1% by mass or more and 30% by mass or less. It is characterized by the following: The present invention provides an oxidative hair dye composition that, by including a high content of (A) ascorbic acid derivatives, can suppress scalp staining and also provides an oxidative hair dye composition with excellent emulsification stability and foaming properties of the first agent.

[0011] Furthermore, one embodiment of the oxidative hair dye composition of the present invention is characterized by containing (C) a higher fatty acid, and having a ratio of the content of (C) a higher fatty acid to (B) a cationic surfactant ((C) / (B)) of 0.3 or more. According to the above embodiment, it is possible to provide an oxidative hair dye composition that can produce foam with good foam quality and lather well.

[0012] Furthermore, one embodiment of the oxidative hair dye composition of the present invention is characterized in that the mixture of the first agent and the second agent contains 0.3% by mass or more of (C) higher fatty acids. According to the above embodiment, it is possible to provide an oxidative hair dye composition that can generate a creamy foam with good lathering properties, a fine texture, and a smooth consistency.

[0013] Furthermore, one embodiment of the oxidative hair dye composition of the present invention is characterized in that the mixture of the first agent and the second agent contains a total of ((B) + (C)) 0.9% by mass or more of (B) cationic surfactant and (C) higher fatty acid. According to the above embodiment, it is possible to provide an oxidative hair dye composition that can produce foam with good foam quality and lather well.

[0014] Also, as one embodiment of the oxidative hair dye composition of the present invention, it is characterized in that it contains (D) a nonionic surfactant having an HLB value of 17 or more in an amount of 0.5% by mass or more. According to the above embodiment, the effects of foaming and improving emulsion stability can be further exerted.

[0015] Also, as one embodiment of the oxidative hair dye composition of the present invention, it is characterized in that it contains (E) paratoluenediamine. According to the above embodiment, the discoloration of the oxidative hair dye composition to black immediately after mixing the first agent and the second agent can be suppressed.

[0016] Also, as one embodiment of the oxidative hair dye composition of the present invention, the first agent used for the foamy oxidative hair dye composition contains (D) a nonionic surfactant having an HLB value of 17 or more in an amount of 1.2% by mass or more. According to the above embodiment, the foaming of the first agent and the improvement of emulsion stability can be achieved.

Effects of the Invention

[0017] According to the present invention, in an oxidative hair dye composition used in the form of foam containing ascorbic acids, it is possible to provide an oxidative hair dye composition that can maintain the emulsion stability of the first agent and form good-quality foam while suppressing skin staining.

Modes for Carrying Out the Invention

[0018] The present invention relates to an oxidative hair dye composition that uses a mixture of a first agent containing an oxidative dye and a second agent containing an oxidizing agent in the form of foam, and by containing (A) ascorbic acids and (B) a cationic surfactant under certain conditions, it can suppress skin staining while maintaining the emulsion stability of the first agent and form high-quality foam.

[0019] The following describes in detail an oxidative hair dye composition in which a mixture of a first agent containing an oxidative dye and a second agent containing an oxidizing agent is used in a foamy form. The oxidative hair dye compositions described in this embodiment are merely illustrative examples for the purpose of explaining the present invention and are not limited thereto. Furthermore, in this specification, unless otherwise specified, the numerical values ​​that define the content of the components refer to the content in the oxidative hair dye composition which is a mixture of the first agent and the second agent.

[0020] [Oxidative hair dye composition] The present invention provides an oxidative hair dye composition which is used by mixing a first agent containing an oxidative dye and an alkaline agent with a second agent containing an oxidizing agent. The mixture contains ascorbic acid derivatives, cationic surfactants, higher fatty acids, nonionic surfactants with an HLB value of 17 or higher, and is intended for use in hair dyeing applications.

[0021] The following describes in detail each component constituting the oxidative hair dye composition of the present invention. <(A) Ascorbic Acids> Ascorbic acid is a type of organic compound that has a lactone structure. It is also an optically active compound, and its L-isomer is the widely known vitamin C. In this invention, ascorbic acids are used to promote the oxidative polymerization reaction of oxidative dyes by an oxidizing agent during mixture preparation, and also to suppress scalp staining. Furthermore, ascorbic acid compounds have a pH-adjusting effect on mixtures. The pH of the oxidative hair dye composition, which is a mixture of the first and second agents, gradually decreases over time due to the action of ascorbic acid compounds. Increasing the amount of ascorbic acid compounds results in a greater decrease in the pH of the oxidative hair dye composition, while decreasing the amount of ascorbic acid compounds results in a smaller decrease in the pH of the oxidative hair dye composition. In other words, by adjusting the amount of ascorbic acid compounds, it is possible to adjust the pH of the oxidative hair dye composition after hair dyeing treatment.

[0022] The ascorbic acids used in this invention are not particularly limited, but include ascorbic acid, erythorbic acid, salts or esters thereof, etc. Specific examples include ascorbic acid, sodium ascorbate, potassium ascorbate, calcium ascorbate, ammonium ascorbate, monoethanolamine ascorbate, diethanolamine ascorbate, erythorbic acid, sodium erythorbate, disodium ascorbate sulfate, magnesium ascorbate phosphate, ascorbyl palmitate, ascorbyl stearate, ascorbyl dipalmitate, ascorbyl tetra-2-hexyldecanoate, ascorbyl myristate, and lauric acid. Examples include ascorbyl phosphate, ascorbyl acetate, ascorbyl propionate, ascorbyl tartrate, ascorbyl citrate, ascorbyl succinate, ascorbyl benzoate, potassium (ascorbyl / tocopheryl) phosphate, ascorbyl ethyl, allantoin ascorbate, chitosan ascorbate, methylsilanol ascorbate, tetradecylhexyl ascorbyl, aminopropyl ascorbyl phosphate, ascorbyl peptide, ascorbyl glucoside, and ascorbyl methylsilanol pectinate. These ascorbic acid compounds can be used individually or in combination of two or more as appropriate. Furthermore, these ascorbic acid compounds can be used in D-, L-, or DL ​​forms.

[0023] Among these, ascorbic acid, sodium ascorbate, potassium ascorbate, calcium ascorbate, ammonium ascorbate, monoethanolamine ascorbate, diethanolamine ascorbate, erythorbic acid, sodium erythorbate, disodium ascorbate sulfate, magnesium ascorbate phosphate, ascorbyl palmitate, ascorbyl stearate, ascorbyl dipalmitate, ascorbyl tetra-2-hexyldecanoate, potassium (ascorbyl / tocopheryl) phosphate, ethyl ascorbyl, allantoin ascorbate, chitosan ascorbate, methylsilanol ascorbate, tetradecylhexyl ascorbate, aminopropyl ascorbyl phosphate, ascorbate polypeptide, ascorbyl glucoside, and ascorbyl methylsilanol pectinate are preferred. More preferably, ascorbic acid is used.

[0024] The ascorbic acid content in the oxidative hair dye composition is 0.1% by mass or more. Preferably, it is 1.0% by mass or more, more preferably 1.5% by mass or more, and even more preferably 2.0% by mass or more. This promotes the oxidative polymerization reaction of the oxidative dye by the oxidizing agent during mixture preparation and suppresses scalp staining. On the other hand, the upper limit is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less. This makes it possible to effectively include components other than ascorbic acid in the oxidative hair dye composition.

[0025] Furthermore, from a safety standpoint, it is preferable to include ascorbic acid derivatives in the first agent.

[0026] <(B) Cationic surfactants> Cationic surfactants are surfactants that have a cationic hydrophilic group. By including a cationic surfactant in the oxidative hair dye composition of the present invention, it is possible to obtain foam with good foam quality, and this foam further improves the ability to apply a sufficient amount to the hair.

[0027] The cationic surfactant used in the present invention is not particularly limited, but examples include alkyl quaternary ammonium salts such as monoalkyl quaternary ammonium salts, dialkyl quaternary ammonium salts, trialkyl quaternary ammonium salts, benzalkonium quaternary ammonium salts, and monoalkyl ether quaternary ammonium salts; amine salts such as alkylamine salts, fatty acid amidoamine salts, ester-containing tertiary amine salts, and Arcover tertiary amine salts; cyclic quaternary ammonium salts such as alkylpyridinium salts and alkylisoquinolium salts; and benzethonium chloride.

[0028] Preferably, the salts are alkyl quaternary ammonium salts, more preferably monoalkyl quaternary ammonium salts and dialkyl quaternary ammonium salts, and particularly preferably monoalkyl quaternary ammonium salts.

[0029] Examples of monoalkyl quaternary ammonium salts include lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, alkyltrimethylammonium chloride, cetyltrimethylammonium chloride, alkyl(16,18)trimethylammonium chloride, cetyltrimethylammonium bromide, lauryltrimethylammonium bromide, stearyltrimethylammonium bromide, behenyltrimethylammonium chloride, lanolin fatty acid aminopropylethyldimethylammonium ethyl sulfate, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, alkyl(28)trimethylammonium chloride, diPOE(2)oleylmethylammonium chloride, diPOE stearylmethylammonium chloride, POE(1)POP(25)diethylmethylammonium chloride, POP methyldiethylammonium chloride, methacryloyloxyethyltrimethylammonium chloride, and behenyltrimethylammonium methyl sulfate. These cationic surfactants can be used individually or in combination of two or more as appropriate. Among these, stearyltrimethylammonium chloride, alkyl(16,18)trimethylammonium chloride, and cetyltrimethylammonium chloride are preferred, with stearyltrimethylammonium chloride being particularly preferred.

[0030] Examples of dialkyl-type quaternary ammonium salts include dialkyl(12-15)dimethylammonium chloride, dialkyl(12-18)dimethylammonium chloride, dialkyl(14-18)dimethylammonium chloride, dicocoyldimethylammonium chloride, dicetyldimethylammonium chloride, distearyldimethylammonium chloride, and isostearyllauryldimethylammonium chloride. Note that POE indicates a polyoxyethylene chain, and POP indicates a polyoxypropylene chain, with the number in parentheses following indicating the number of moles added. Also, the number in parentheses following the alkyl group indicates the number of carbon atoms in the fatty acid chain.

[0031] The cationic surfactant content in the oxidative hair dye composition is 0.3% by mass or more. The lower limit of the content is preferably 0.4% by mass or more, more preferably 0.6% by mass or more, and even more preferably 0.7% by mass or more. A cationic surfactant content of 0.3% by mass or more allows for good foaming. On the other hand, there is no particular upper limit, but it is preferably 2.0% by mass or less, more preferably 1.0% by mass or less. This prevents the foam from becoming light and airy, reducing the amount of oxidative hair dye composition applied to the hair, and prevents the foam from splashing and staining the surroundings. Furthermore, it allows for the effective inclusion of components other than the cationic surfactant in the oxidative hair dye composition.

[0032] <(C)Higher fatty acid> Higher fatty acids refer to saturated or unsaturated fatty acids with 12 or more carbon atoms, for example. Higher fatty acids may be linear, branched, or cyclic. By including higher fatty acids in the oxidative hair dye composition of the present invention, lathering is improved, resulting in a creamy, rich, and high-quality foam. The improved lathering allows for a sufficient amount of foam to be spread evenly throughout the hair. Furthermore, the creamy, rich foam is less likely to splatter, minimizing mess and making it easier to spread evenly throughout the hair.

[0033] The higher fatty acids used in the present invention are not particularly limited, but examples include lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, montanic acid, palmitoleic acid, oleic acid, elaidic acid, ricinoleic acid, linoleic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid, and docosahexaenoic acid. These higher fatty acids can be used individually or in combination of two or more as appropriate. Among these, lauric acid, myristic acid, stearic acid, and palmitic acid are preferred, and stearic acid and palmitic acid are even more preferred from the viewpoint of good foaming ability.

[0034] The content of higher fatty acids in the oxidative hair dye composition is not particularly limited, but for example, it is 0.05 to 3.0% by mass. The lower limit of the content is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more. This makes it possible to obtain a creamy and rich foam with good foam quality, which is less likely to splatter and can suppress staining of the surroundings. On the other hand, the upper limit of the content of higher fatty acids is preferably 2.0% by mass or less, and more preferably 1.0% by mass or less. This makes it possible to obtain a foam that lathers well and is easy to spread evenly over the hair.

[0035] <(C) / (B)> The ratio of the content of (C) higher fatty acid to the cationic surfactant (B) of the present invention ((C) / (B)) is not particularly limited, but is preferably 0.3 or more, more preferably 0.5 or more, and even more preferably 0.7 or more. This allows for good lathering and the production of high-quality foam. On the other hand, the upper limit of (C) / (B) is preferably 2.0 or less, more preferably 1.5 or less, and even more preferably 1.0 or less. This results in a fine foam that is easy to spread throughout the hair.

[0036] <(B)+(C)> The total content of (B) cationic surfactant and (C) higher fatty acid in the present invention ((B) + (C)) is not particularly limited, but is preferably 0.9% by mass or more, more preferably 1.0% by mass or more, and even more preferably 1.2% by mass or more. This allows for good foaming and the production of foam with good foam quality. On the other hand, the upper limit of (B) + (C) is preferably 2.0% by mass or less, more preferably 1.8% by mass or less, and even more preferably 1.4% by mass or less. This allows for the production of fine-textured, long-lasting foam with good foam quality.

[0037] <(D) Nonionic surfactants with an HLB value of 17 or higher> Nonionic surfactants are surfactants whose hydrophilic groups do not ionically dissociate in water. The HLB value is a value that represents the degree of affinity of a surfactant to water, oil, and (water-insoluble organic compounds). The HLB value ranges from 0 to 20, with values ​​closer to 0 indicating higher lipophilicity and values ​​closer to 20 indicating higher hydrophilicity. The HLB value should be measured according to "20.3.1 Measurement of HLB Value by Emulsification Method" (pages 854-855) described in "Handbook - Cosmetics and Pharmaceutical Raw Materials - Revised Edition (published February 1, 1977, Nikko Chemicals Co., Ltd.)". Hereafter, the method for measuring the HLB value in this specification shall conform to this method. By including a nonionic surfactant with an HLB value of 17 or higher in the oxidative hair dye composition of the present invention, the solubility of the nonionic surfactant in water is improved, enhancing emulsification stability. Furthermore, by adjusting the combination with other components and the balance of their amounts, foaming is also improved, thereby further enhancing the effects of the present invention.

[0038] The nonionic surfactant used in the present invention is not particularly limited as long as its HLB value is 17 or higher, but examples include polyoxyethylene (hereinafter referred to as POE) alkyl ethers, POE alkylphenyl ethers, POE-polyoxypropylene (hereinafter referred to as POP) alkyl ethers, POE sorbitan fatty acid esters, POE mono fatty acid esters, POE glycerin fatty acid esters, POE propylene glycol fatty acid esters, polyglycerin fatty acid esters, monoglycerin fatty acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, alkyl polyglucosides, etc. Specific examples of POE alkyl ethers include POE lauryl ether, POE cetyl ether, POE stearyl ether, POE behenyl ether, POE oleyl ether, POE lanolin, POE phytosterol, etc. One or more of these nonionic surfactants with an HLB value of 17 or higher can be used in appropriate combinations. The number of repeating units for POE and POP can range from 2 to 100, and any combination that exhibits surfactant activity can be used.

[0039] The content of nonionic surfactants with an HLB value of 17 or higher in the oxidative hair dye composition of the present invention is not particularly limited, but is, for example, 0.5 to 3.0% by mass. The lower limit of the content is preferably 0.8% by mass or more, and more preferably 1.1% by mass or more. This further enhances the effects of the present invention, such as improved foaming and emulsification stability. On the other hand, the upper limit of the content of nonionic surfactants with an HLB value of 17 or higher is preferably 2.0% by mass or less. This allows for the effective inclusion of components other than nonionic surfactants with an HLB value of 17 or higher in the oxidative hair dye composition.

[0040] Furthermore, the content of nonionic surfactants with an HLB value of 17 or higher in the first agent is not particularly limited, but is, for example, 0.2 to 2.0% by mass. The lower limit of the content is preferably 0.4% by mass or more, and more preferably 0.5% by mass or more. This can further improve foaming and emulsification stability. On the other hand, the upper limit of the content of nonionic surfactants with an HLB value of 17 or higher in the first agent is preferably 1.5% by mass or less, and more preferably 0.7% by mass or less. This allows for the effective inclusion of components other than nonionic surfactants with an HLB value of 17 or higher in the first agent.

[0041] <Para-toluylenediamine> Para-toluylenediamine is a dye intermediate. By including para-toluylenediamine, the black discoloration that occurs immediately after mixing the first and second agents can be suppressed. The content of para-toluylenediamine is not particularly limited, but is, for example, 0.5 to 5.5% by mass. Preferably, the lower limit of the content is 1.0% by mass or more. This suppresses the color change to black immediately after mixing the first and second agents. On the other hand, preferably, the upper limit is 4.5% by mass or less. This allows for the effective inclusion of components other than para-toluylenediamine in the oxidative hair dye composition.

[0042] <Oxidation dyes> The oxidative dye incorporated into the first agent of the present invention is a dye that develops color through oxidative polymerization by an oxidizing agent. It is usually divided into a dye intermediate and a coupler. The dye intermediate is not particularly limited, but examples include phenylenediamines, aminophenols, diaminopyridines, and their salts. Examples of salts include hydrochloride salts, sulfates, acetates, etc. One or more of these can be used in appropriate combinations. Among these, p-phenylenediamine, toluene-2,5-diamine, p-aminophenol, N,N-bis(β-hydroxyethyl)-p-phenylenediamine, N-(β-hydroxyethyl)-N-ethyl-p-phenylenediamine, 2-(β-hydroxyethyl)-p-phenylenediamine and their salts are preferred in terms of effectiveness. The content of the dye intermediate in the oxidative hair dye composition is not particularly limited, but for example, 0.1% to 10% by mass is preferred. This allows for an excellent hair dyeing effect.

[0043] Furthermore, there are no particular limitations on the couplers, but examples include m-diamines, aminophenols, or diphenols, specifically resorcinol, pyrogallol, catechol, m-aminophenol, m-phenylenediamine, o-aminophenol, 2,4-diaminophenol, 1,2,4-benzenetriol, toluene-3,4-diamine, toluene-2,4-diamine, hydroquinone, α-naphthol, 2,6-diaminopyridine, 1,5-dihydroxynaphthalene, 5- Amino-o-cresol, diphenylamine, p-methylaminophenol, phloroglucin, 2,4-diaminophenoxyethanol, 2,4-diaminophenoxyethanol hydrochloride, gallic acid, tannic acid, ethyl gallate, methyl gallate, propyl gallate, gallnut, 1-methoxy-2-amino-4-(2-hydroxyethyl)aminobenzene, 5-(2-hydroxyethylamino)-2-methylphenol, etc., and their salts can be used one or more of these in appropriate combinations. The content of the coupler in the oxidative hair dye composition is not particularly limited, but is, for example, 0.01 to 15% by mass. The lower limit is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more. The upper limit is preferably 10% by mass or less, and more preferably 5% by mass or less. This allows for an excellent hair dyeing effect.

[0044] <Alkaline agent> The alkaline agent is included in the first agent and has the effect of swelling the hair, promoting the penetration of dyes and oxidizing agents, giving the hair lightness, and adjusting the pH of the oxidative hair dye composition. Specific examples of alkaline agents are not particularly limited, but include ammonia, alkanolamines, ammonium salts, silicates, metasilicates, phosphates, organic amines (2-amino-2-methyl-1,3-propanediol, guanidine, etc.), inorganic alkalis (sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, etc.), basic amino acids (arginine, lysine, etc.) and their salts. Specific examples of alkanolamines include monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, isopropanolamine, dipropanolamine, trippropanolamine, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, and 2-amino-2-hydroxymethyl-1,3-propanediol. Specific examples of ammonium salts include ammonium halides, inorganic ammonium salts, and organic ammonium salts. Examples of ammonium halides include ammonium chloride, examples of inorganic ammonium salts include ammonium carbonate, ammonium bicarbonate, ammonium sulfate, ammonium phosphate, and ammonium hydrogen phosphate, and examples of organic ammonium salts include ammonium lactate, ammonium citrate, and ammonium glycolate. Specific examples of silicates include sodium silicate and potassium silicate. Specific examples of metasilicates include sodium metasilicate and potassium metasilicate. Specific examples of phosphates include monoammonium phosphate, disodium ammonium phosphate, disodium monohydrogen phosphate, and trisodium phosphate. One or more of these can be used in appropriate combinations. Among these alkaline agents, it is preferable to include at least ammonia in the first agent due to its excellent uniformity.

[0045] The amount of alkaline agent in the first agent is appropriately set to adjust the pH of the oxidative hair dye composition. Preferably, it is 0.01 to 10% by mass. More preferably, the lower limit of the content is 0.1% by mass or more. More preferably, the upper limit is 8% by mass or less.

[0046] <Oxidizing agent> The second agent of the present invention typically contains an oxidizing agent. The oxidizing agent has the effect of oxidizing the oxidative dye to produce color, or of decomposing the melanin inside the hair. The oxidizing agent can be any substance with oxidizing power and is not particularly limited, but examples include hydrogen peroxide, urea peroxide, melamine peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, ammonium persulfate, potassium persulfate and sodium persulfate persulfates and other persulfates, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, hydrogen peroxide adducts of sulfates, hydrogen peroxide adducts of phosphates, hydrogen peroxide adducts of pyrophosphates, peracetic acid and its salts, performic acid and its salts, permanganate, bromate, etc. One or more of these oxidizing agents can be used in appropriate combinations. Among these oxidizing agents, hydrogen peroxide is preferred because it has excellent melanin decolorizing power. Furthermore, persulfates such as ammonium persulfate, potassium persulfate, and sodium persulfate may be included as oxidizing agents. The content of the oxidizing agent in the second agent is not particularly limited, but is preferably 0.1 to 20% by mass, more preferably 0.3 to 10% by mass. The content of the oxidizing agent in the oxidative hair dye composition is also not particularly limited, but is, for example, 0.1 to 15% by mass, more preferably 1 to 9% by mass. When hydrogen peroxide is included as the oxidizing agent, it is preferable to include ethylene glycol phenyl ether (phenoxyethanol), hydroxyethane diphosphonic acid, phosphoric acid, citric acid, or a salt thereof as a stabilizer to improve its stability.

[0047] <Other ingredients> The oxidative hair dye composition of the present invention contains, as other components, water, a pH adjuster (excluding (A) ascorbic acids), a surfactant (excluding (B) cationic surfactants and (D) nonionic surfactants with an HLB value of 17 or more), an oily component, a chelating agent, a direct dye, an antioxidant such as sodium metabisulfite, a preservative such as phenoxyethanol and sodium benzoate, an organic solvent such as ethanol, saccharides such as sorbitol and maltose, a water-soluble polymer such as hydroxyethyl cellulose and carboxyvinyl polymer, a solution of poly(dimethyldimethylenepiperidinium chloride) (a solution of poly(dimethyldimethylenepyrrolidinium chloride)), a cationized water-soluble polymer such as diallyldimethylammonium chloride-hydroxyethyl cellulose, a polyhydric alcohol such as polyethylene glycol and dipropylene glycol, an inorganic salt such as sodium chloride, ammonium sulfate, ammonium nitrate, ammonium acetate, citric acid, tartaric acid, lactic acid, malic acid, succinic acid, fumaric acid, maleic acid, pyrophosphoric acid, gluconic acid, glucuronic acid, a hair growth component, a plant extract, a crude drug extract, an amino acid / peptide, urea, vitamins, a fragrance, and an ultraviolet absorber, etc., which can be appropriately selected and contained.

[0048] <pH adjuster> The pH adjuster is not particularly limited, and examples thereof include phosphoric acid, acetic acid, hydrochloric acid, sulfuric acid, succinic acid, and levulinic acid. The pH adjuster is formulated together with the alkali agent contained in the first agent to adjust the pH of the oxidative hair dye composition.

[0049] <Surfactant (excluding (B) cationic surfactants and (D) nonionic surfactants with an HLB value of 17 or more)> Examples of the surfactant include nonionic surfactants with an HLB value of less than 17, anionic surfactants, and amphoteric surfactants. In the following description, POE represents a polyoxyethylene chain, POP represents a polyoxypropylene chain, and the number in parentheses following this indicates the added molar number. Also, the number in parentheses following alkyl indicates the carbon number of the fatty acid chain.

[0050] Examples of nonionic surfactants with an HLB value of less than 17 include POE alkyl ethers, POE alkylphenyl ethers, POE·POP alkyl ethers, POE sorbitan fatty acid esters, POE mono fatty acid esters, POE glycerin fatty acid esters, polyglycerin fatty acid esters, monoglycerin fatty acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, alkyl polyglucosides, etc. Specific examples of POE alkyl ethers include POE lauryl ether, POE cetyl ether, POE stearyl ether, POE behenyl ether, POE lanolin, and POE phytosterol. The number of repeating units for POE and POP can range from 2 to 100, and any combination that exhibits surfactant activity can be used.

[0051] The content of nonionic surfactants with an HLB value of less than 17 in an oxidative hair dye composition is not particularly limited, but is preferably 0.001 to 30% by mass. More preferably, the lower limit is 0.01% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and particularly preferably 0.2% by mass or more. More preferably, the upper limit is 20% by mass or less, even more preferably 10% by mass or less, even more preferably 7% by mass or less, and particularly preferably 5% by mass or less.

[0052] Examples of anionic surfactants include alkyl ether sulfates, POE alkyl ether sulfates, alkyl sulfates, alkenyl ether sulfates, alkenyl sulfates, olefin sulfonates, alkanesulfonates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, α-sulfone fatty acid salts, N-acyl amino acid type surfactants, phosphate mono or diester type surfactants, and sulfosuccinate esters. The counterions of the anionic groups of these surfactants may be, for example, sodium ions, potassium ions, and triethanolamine.

[0053] More specifically, examples include sodium lauryl sulfate, sodium myristyl sulfate, potassium lauryl sulfate, ammonium lauryl sulfate, triethanolamine lauryl sulfate, sodium cetyl sulfate, sodium stearyl sulfate, sodium POE lauryl ether sulfate, triethanolamine POE lauryl ether sulfate, ammonium POE lauryl ether sulfate, sodium POE stearyl ether sulfate, sodium stearoyl methyl taurate, triethanolamine dodecylbenzenesulfonate, sodium tetradecenesulfonate, sodium lauryl phosphate, POE lauryl etheric acid and its salts, N-lauroyl glutamates (such as sodium lauroyl glutamate), N-lauroyl methyl-β-alanine salt, N-acylglycine salt, N-acyl glutamate, and higher fatty acids such as lauric acid, myristic acid, and salts of these higher fatty acids. One or more of these can be used.

[0054] The content of anionic surfactant in the oxidative hair dye composition is not particularly limited, but is preferably 0.01 to 5% by mass. More preferably, the lower limit is 0.02% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.07% by mass or more, and particularly preferably 0.1% by mass or more. More preferably, the upper limit is 4% by mass or less, even more preferably 3% by mass or less, even more preferably 2% by mass or less, and particularly preferably 1% by mass or less.

[0055] Specific examples of amino acid-type amphoteric surfactants include, for example, glycine-type amphoteric surfactants and aminopropionic acid-type amphoteric surfactants. Specific examples of glycine-type amphoteric surfactants include sodium N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine (sodium lauroamphoacetate), 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, sodium undecylhydroxyethylimidazolinium betaine, alkyldiaminoethylglycine hydrochloride, sodium N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine, disodium N-coconut oil fatty acid acyl-N'-carboxyethoxyethyl-N'-carboxyethylethylenediamine, disodium N-coconut oil fatty acid acyl-N'-carboxymethoxyethyl-N'-carboxymethylethylenediamine, sodium lauryldiaminoethylglycine, and sodium palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine. Specific examples of aminopropionic acid-type amphoteric surfactants include sodium laurylaminopropionate, sodium laurylaminodipropionate, and triethanolamine laurylaminopropionate.

[0056] Specific examples of betaine-type amphoteric surfactants include, for example, aminoacetic acid betaine-type amphoteric surfactants and sulfobetaine-type amphoteric surfactants. Specific examples of aminoacetic acid betaine-type amphoteric surfactants include coconut oil alkyl betaine, lauryldimethylaminoacetic acid betaine, myristyldimethylaminoacetic acid betaine, stearyldimethylaminoacetic acid betaine, stearyldimethylbetaine sodium, coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, ricinoleic acid amidopropyl betaine, and stearyl dihydroxyethyl betaine. Specific examples of sulfobetaine-type amphoteric surfactants include laurylhydroxysulfobetaine.

[0057] The content of amphoteric surfactant in the oxidative hair dye composition is not particularly limited, but is preferably 0.001 to 5% by mass. More preferably, the lower limit is 0.005% by mass or more, and even more preferably 0.01% by mass or more. More preferably, the upper limit is 3% by mass or less, and even more preferably 2.5% by mass or less.

[0058] The total content of all surfactants in the oxidative hair dye composition is not particularly limited, but is preferably 0.01 to 50% by mass. The lower limit is more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more. The upper limit is more preferably 40% by mass or less, and even more preferably 30% by mass or less.

[0059] <Oily components> The oily components are not particularly limited, but examples include higher alcohols, fats and oils, waxes, hydrocarbons, alkyl glyceryl ethers, esters, silicones, and polyhydric alcohols. Examples of higher alcohols include cetyl alcohol (cetanol), 2-hexyldecanol, stearyl alcohol, isostearyl alcohol, cetostearyl alcohol, oleyl alcohol, arachidodecanol, behenyl alcohol, 2-octyldodecanol, lauryl alcohol, myristyl alcohol, decyltetradecanol, and lanolin alcohol. Examples of oils and fats include lanolin, olive oil, camellia oil, shea butter, almond oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, corn oil, rapeseed oil, rice bran oil, rice germ oil, grape seed oil, avocado oil, macadamia nut oil, castor oil, coconut oil, and evening primrose oil. Examples of waxes include beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin. Examples of hydrocarbons include paraffin, olefin oligomers, polyisobutene, hydrogenated polyisobutene, mineral oil, squalane, polybutene, polyethylene, microcrystalline wax, and petrolatum. Examples of alkylglyceryl ethers include batyl alcohol, chymyl alcohol, ceracyl alcohol, and isostearyl glyceryl ether. Examples of esters include diisopropyl adipate, isopropyl myristate, cetyl octanoate, isononyl isononanoate, octyldodecyl myristate, isopropyl palmitate, stearyl stearate, myristyl myristate, isotridecyl myristate, 2-ethylhexyl palmitate, octyldodecyl ricinoleate, cholesteryl / lanosteryl fatty acids having 10 to 30 carbon atoms, cetyl lactate, lanolin acetate, ethylene glycol di-2-ethylhexanoate, pentaerythritol fatty acid ester, dipentaerythritol fatty acid ester, cetyl caprate, glyceryl tricaprylate, diisostearyl malate, dioctyl succinate, and cetyl 2-ethylhexanoate. Examples of silicones include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, hydroxyl-terminated dimethylpolysiloxane, highly polymerized silicones having an average degree of polymerization of 650 to 10,000, polyether-modified silicones, amino-modified silicones, betaine-modified silicones, alkyl-modified silicones, alkoxy-modified silicones, carboxy-modified silicones, and fluorine-modified silicones. Examples of polyhydric alcohols include glycols and glycerin. Examples of glycols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, and 1,3-butylene glycol. Examples of glycerin include glycerin, diglycerin, and polyglycerin. Oily components are added to make the hair more supple. They are also added to form the desired dosage form of the first and second agents. For example, when forming a cream-type dosage form, the amount of oily components added to the first and second agents is preferably in the range of 3 to 50% by mass.

[0060] <Chelating agent> The chelating agents are not particularly limited, but examples include ethylenediaminetetraacetic acid (EDTA), hydroxyethylethylenediaminetriacetic acid (HEDTA) and its salts, diethylenetriaminepentaacetic acid and its salts, and hydroxyethanediphosphonic acid (HEDP) and its salts.

[0061] The oxidative hair dye composition of the present invention may also contain, in addition, antioxidants (excluding (A) ascorbic acids), such as anhydrous sodium sulfite, preservatives, such as phenoxyethanol and sodium benzoate, direct dyes, such as basic dyes, nitro dyes, natural dyes, and disperse dyes, organic solvents, such as ethanol, sugars, such as sorbitol and maltose, water-soluble polymers, such as nonionic polymers, anionic polymers, cationic polymers, and amphoteric polymers, stabilizers, such as phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, and tannic acid, inorganic salts, such as sodium chloride and sodium carbonate, plant extracts, herbal extracts, vitamins, fragrances, and ultraviolet absorbers, as well as at least one selected from those listed in the "Standards for Ingredients of Quasi-Drugs" (published June 2006, Yakuji Nippo Co., Ltd.). These components are incorporated into the first and second agents as needed.

[0062] <Direct dye> Direct dyes are colored compounds that adhere to or penetrate hair to color it. Examples include acid dyes, basic dyes, natural dyes, nitro dyes, HC dyes, and disperse dyes. These direct dyes may be used individually or in combination.

[0063] Examples of the above-mentioned acid dyes include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Red No. 227, Red No. 230 (1), Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Orange No. 205, Orange No. 207, Orange No. 402, Green No. 3, Green No. 204, Green No. 401, Purple No. 401, Blue No. 1, Blue No. 2, Blue No. 202, Brown No. 201, Black No. 401, etc.

[0064] The above basic dyes include Basic Blue 3, Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 47, Basic Blue 99, Basic Brown 4, Basic Brown 16, Basic Brown 17, Basic Green 1, Basic Green 4, Basic Orange 1, Basic Orange. 2, Basic Orange 31, Basic Red 1, Basic Red 2, Basic Red 22, Basic Red 46, Basic Red 51, Basic Red 76, Basic Red 118, Basic Violet 1, Basic Violet 3, Basic Violet 4, Basic Violet 10, Basic Violet11:1, Basic Examples include Violet 14, Basic Violet 16, Basic Yellow 11, Basic Yellow 28, Basic Yellow 57, and Basic Yellow 87.

[0065] Examples of the natural dyes mentioned above include gardenia pigment, turmeric pigment, annatto pigment, copper chlorophyllin sodium, paprika pigment, lac pigment, and henna.

[0066] Examples of the above-mentioned nitro dyes include 4-nitro-o-phenylenediamine, 2-nitro-p-phenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, picramic acid, picric acid, and their salts.

[0067] The above HC dyes include HC Blue No.2, HC Blue No.5, HC Blue No.6, HC Blue No.9, HC Blue No.10, HC Blue No.11, HC Blue No.12, HC Blue No.13, HC Orange No.1, HC Orange No.2, HC Orange No.3, HC Red No.1, HC Red No.3, HC Red No.7, HC Red No.10, HC Red No.11, HC Red No.13, HC Red. Examples include No. 14, HC Violet No. 1, HC Violet No. 2, HC Yellow No. 2, HC Yellow No. 4, HC Yellow No. 5, HC Yellow No. 6, HC Yellow No. 9, HC Yellow No. 10, HC Yellow No. 11, HC Yellow No. 12, HC Yellow No. 13, HC Yellow No. 14, and HC Yellow No. 15.

[0068] Examples of the above-mentioned disperse dyes include Disperse Black 9, Disperse Blue 1, Disperse Blue 3, Disperse Blue 7, Disperse Brown 4, Disperse Orange 3, Disperse Red 11, Disperse Red 15, Disperse Red 17, Disperse Violet 1, Disperse Violet 4, Disperse Violet 15, etc.

[0069] The content of direct dyes in the oxidative hair dye composition is not particularly limited, but is preferably 0.001 to 10% by mass. More preferably, the lower limit is 0.01% by mass or more, and even more preferably 0.05% by mass or more. More preferably, the upper limit is 5% by mass or less, and even more preferably 3% by mass or less.

[0070] <pH of oxidative hair dye composition> The oxidative hair dye composition of the present invention is not particularly limited, but it is preferable that the pH immediately after mixing the first and second agents is 6.0 to 10. More preferably, the lower limit of the pH is 6.5 or higher. More preferably, the upper limit of the pH is 9.5 or lower. By keeping the pH within this range, the scalp stain prevention effect and hair dyeing effect of (A) ascorbic acid can be further exhibited. The pH immediately after mixing is adjusted by the amounts of acid and alkali agents used. For example, increasing the amount of pH adjusting agent such as (A) ascorbic acid or other acids will decrease the pH immediately after mixing, while increasing the amount of alkali agent will increase the pH immediately after mixing.

[0071] Furthermore, the pH and pH drop after hair dyeing can be adjusted by setting the pH after mixing and the amount of (A) ascorbic acid added. Increasing the amount of (A) ascorbic acid adds can increase the pH drop, while decreasing the amount of ascorbic acid adds can decrease the pH drop.

[0072] <Method for measuring the pH of oxidative hair dye compositions> Here, we will show a method for measuring the pH of an oxidative hair dye composition. For example, the measurement is performed using a "Glass Electrode Type Hydrogen Ion Concentration Indicator (Model No.: SS056, Model: F-52)" manufactured by Horiba STEC Co., Ltd. (pH immediately after mixing) In this invention, "pH immediately after mixing" refers to the pH two minutes after the start of mixing of the first and second agents. Specifically, the first and second agents are quickly mixed, the mixture is transferred to a measuring instrument, and the pH two minutes after the start of mixing is measured by immersing a detector in the mixture. The mixing operation can be appropriately selected depending on the dosage forms of the first and second agents. For example, if the first and second agents are liquids, they are mixed using a magnetic stirrer, and if they are cream-type agents, they are mixed using a brush or the like.

[0073] <Dosage form> The dosage forms of the first and second components in the oxidative hair dye composition are not particularly limited, but examples include aqueous solutions, dispersions, emulsions, gels, foams, and creams.

[0074] <How to use oxidative hair dye composition> The method of using the oxidative hair dye composition of the present invention is the same as for conventional oxidative hair dye compositions: the first and second agents are mixed and immediately applied to the hair, and then left for a predetermined time to dye the hair. In addition, the oxidative hair dye composition of the present invention uses the mixture of the first and second agents in a foamy state. The foamy state can be formed by foaming the mixture on the hair, or by putting the first and second agents into a non-aerosol foamer container, mixing them, and then forming a foam. [Examples]

[0075] The present invention will be further described below with reference to examples and comparative examples relating to the oxidative hair dye composition of the present invention, but the present invention is not limited in any way to these examples and comparative examples. (Examples 1-26, Comparative Examples 1-2) In each example, the first and second preparations were prepared by mixing the components shown in Tables 1 to 7. Next, the first and second agents were mixed in a 1:3 ratio to prepare a cream-type oxidative hair dye composition. Note that the numerical values ​​indicating the content of each component in Table 1 and subsequent tables are in mass percent. For each example, "foam volume," "foam quality," "emulsification stability," and "scalp staining" were evaluated, and the results are shown in Table 1. The evaluation method for each evaluation item is as follows.

[0076] <Method for evaluating foam volume> For each example of the creamy oxidative hair dye composition prepared as described above, 120g was uniformly applied to an evaluation wig. Immediately after application, the oxidative hair dye composition was rubbed into the wig with both hands for 3 minutes to create a lather. Then, only the foam was collected in a container. After collecting only the foam in the container, the container was left to stand at 25°C for 1 minute, and then the amount of foam in the container was visually checked. The evaluation results are recorded in the "Foam Amount" column in each table. A transparent container with a capacity of 200mL was used. (Evaluation Criteria) ◎: The amount of foam filled the container. ○: The amount of foam filled approximately 3 / 5 or 4 / 5 of the container. △: The amount of foam filled approximately 2 / 5 of the container. ×: The amount of foam filled approximately 1 / 5 of the container, or no foam was produced.

[0077] <Method for evaluating foam quality> For each example of the creamy oxidative hair dye composition prepared as described above, 120g was uniformly applied to an evaluation wig. Immediately after application, the oxidative hair dye composition was kneaded and lathered on the wig with both hands for 3 minutes. The panelists visually observed the fineness and volume of the foam, and tactilely observed the texture of the foam, and evaluated the foam quality according to the following criteria. The evaluation results are recorded in the "Foam Quality" column of each table. (Evaluation Criteria) ◎: It lathers very easily, producing a rich, fine-textured foam that doesn't disappear at all. ○: It lathers easily, produces a rich, fine-textured foam, and the foam hardly disappears, or disappears only slightly. △: It lathers up, but the foam disappears, or it lathers up, but the foam is sticky and difficult to spread. ×: Does not foam

[0078] <Method for evaluating emulsification stability> The first agent, prepared as described above, was weighed out at a rate of 30 grams into a No. 4 standard bottle, sealed with an inner lid and a regular lid, and left to stand at 60°C for one week. The evaluation was then performed according to the following criteria. The evaluation results are recorded in the "Emulsification Stability (Evaluation of the First Agent)" column in each table. (Evaluation Criteria) ◎: No separation was observed after standing at 60°C for one week and at 50°C for one month. ○: No separation, or separation of less than 2 mm, after standing at 60°C for 1 day or at 50°C for 1 month. △: Separation of 2mm to less than 4mm after standing at 60℃ for 1 day and at 50℃ for 1 month. ×: After standing at 60°C for 1 day and 50°C for 1 month, separation of 4 mm or more was observed.

[0079] <Method for evaluating scalp stains> Each example of the creamy oxidative hair dye composition prepared as described above was applied to a 1 cm diameter circular area on the inside of the arm, left for 30 minutes, and then rinsed off with warm water. Furthermore, the area was gently rubbed with fingers for 1 minute using "Promaster Color Care LX Stylish Line" shampoo (manufactured by Hoyu Co., Ltd.), rinsed with warm water, and the degree of dyeing to the skin was visually evaluated. The evaluation results are recorded in the "Scalp Stains" column in each table. (Evaluation Criteria) ◎: No discoloration on the skin, or slight discoloration that is not noticeable and is in good condition. ○: Stains the skin, and the color remains somewhat noticeable. ×: Stains the skin, leaving noticeable discoloration; unacceptable.

[0080] (Examples 27-30) Similar to Example 1, the first and second agents were prepared by mixing the components shown in Table 8. The first and second agents were mixed in a 1:3 ratio to prepare a cream-type oxidative hair dye composition. The "change to black" of the cream-type oxidative hair dye composition for each example was evaluated. The evaluation results are recorded in the "Change to Black" column in each table. If the evaluation result is shown as "-", then no evaluation was performed. The evaluation method for "change to black" is as follows.

[0081] <Method for evaluating discoloration to black> For each example of the cream-type oxidative hair dye composition, the panelists visually observed the degree of change to black color over a 5-minute period after mixing and evaluated it according to the following criteria. ◎: No discoloration after mixing the first and second agents and letting it stand for 5 minutes. ○: After mixing the first and second agents, a slight black color change was observed after 5 minutes. ×: After mixing the first and second agents, the mixture turned black after 5 minutes.

[0082] [Table 1]

[0083] [Table 2]

[0084] [Table 3]

[0085] [Table 4]

[0086] [Table 5]

[0087] [Table 6]

[0088] [Table 7]

[0089] [Table 8]

[0090] As shown in Tables 1 to 8, the amount of foam, foam quality, emulsification stability, and scalp staining of the oxidative hair dye composition of the present invention in the examples were all good in all evaluations, and there were no defects.

[0091] As shown in Table 1, Example 1 and Comparative Example 1 differ in that they contain (A) ascorbic acid compounds. Example 1 showed good results in suppressing scalp staining. This indicates that (A) ascorbic acid compounds effectively suppress scalp staining during hair dyeing with oxidative hair dye compositions.

[0092] As shown in Table 1, Example 1 and Comparative Example 2 differ in whether or not they contain (B) cationic surfactants. Example 1 showed better results than Comparative Example 2 in terms of foam volume, foam quality, and emulsification stability. This indicates that (B) cationic surfactants improve foam volume, foam quality, and emulsification stability in oxidative hair dye compositions containing (A) ascorbic acids.

[0093] As shown in Table 2, comparing Examples 2 to 4, it can be seen that as the ratio of (C) higher fatty acid content to (B) cationic surfactant increases, the amount of foam decreases, but the foam quality improves.

[0094] As shown in Table 3, comparing Examples 5 to 8, it can be seen that increasing the total content of (B) cationic surfactants and (C) higher fatty acids improves foam volume, foam quality, emulsification stability, and pH immediately after mixing in the oxidative hair dye composition.

[0095] As shown in Table 4, comparing Examples 9 to 12, it can be seen that (B) as the content of cationic surfactant increases, the amount of foam improves.

[0096] As shown in Table 5, a comparison of Examples 13-16 reveals that the presence of (C) higher fatty acids improves foam quality. Furthermore, it can be seen that increasing the content of (C) higher fatty acids improves foam volume while maintaining foam quality and emulsification stability.

[0097] As shown in Table 6, a comparison of Examples 17 to 22 reveals that the emulsion stability of the first agent is improved when (D) a nonionic surfactant with an HLB value of 17 or higher is included. Furthermore, it can be seen that the emulsion stability and foam volume of the first agent improve as the content of (D) a nonionic surfactant with an HLB value of 17 or higher increases.

[0098] As shown in Table 7, a comparison of Examples 23 to 26 revealed that good results were obtained even when the substances used differed in (B) cationic surfactant, (C) higher fatty acid, and (D) nonionic surfactant with an HLB value of 17 or higher. Therefore, it can be seen that various substances can be used as (B) cationic surfactant, (C) higher fatty acid, and (D) nonionic surfactant with an HLB value of 17 or higher in the oxidative hair dye composition of the present invention.

[0099] As shown in Table 8, a comparison of Examples 27-30 reveals that the inclusion of (E) para-toluylenediamine can suppress the black color change of the oxidative hair dye composition immediately after mixing the first and second agents. [Industrial applicability]

[0100] The present invention provides an oxidative hair dye composition that can form good foam while maintaining emulsification stability and also has a scalp stain suppression effect.

Claims

1. A first agent containing an oxidizing dye and an oily component, An oxidative hair dye composition in which a mixture of a second agent containing an oxidizing agent is used as a foam, The aforementioned oxidative hair dye composition contains the following components (A), (B), and (C): (A) L-ascorbic acid salt or ester in an amount of 1.0% by mass or more and 10.0% by mass or less (B) Cationic surfactant in an amount of 0.3% by mass or more and 2.0% by mass or less (C) Higher fatty acids: 0.3% by mass or more and 3.0% by mass or less The first agent further contains (D) a nonionic surfactant with an HLB value of 17 or higher in an amount of 1.2% by mass or more and 2.5% by mass or less, The second agent further contains (D) a nonionic surfactant with an HLB value of 17 or higher and (F) a nonionic surfactant with an HLB value of less than 17. The second agent is characterized by containing component (D) and component (F) in a mixture of the first agent and the second agent such that the total content of component (D) and component (F) is 0.1% by mass or more and 30% by mass or less.

2. The oxidative hair dye composition according to Claim 1, characterized in that the ratio of the content of (C) higher fatty acid to (B) cationic surfactant ((C) / (B)) is 0.3 or more.

3. The oxidative hair dye composition according to claim 1 or 2, characterized in that the mixture of the first agent and the second agent contains a total of 0.9% by mass or more of the (B) cationic surfactant and the (C) higher fatty acid in an amount equal to ((B) + (C)).

4. (D) The oxidative hair dye composition according to any one of claims 1 to 3, characterized in that it contains 0.80% by mass or more and 1.15% by mass or less of a nonionic surfactant with an HLB value of 17 or higher.

5. The oxidative hair dye composition according to any one of claims 1 to 4, characterized in that the (A) L-ascorbic acid ester is at least one selected from the group consisting of disodium ascorbic acid sulfate, magnesium ascorbic acid phosphate, ascorbyl palmitate, ascorbyl stearate, ascorbyl dipalmitate, ascorbyl tetra-2-hexyldecanoate, potassium (ascorbyl / tocopheryl) phosphate, tetradecylhexyl ascorbyl, aminopropyl ascorbyl phosphate, and ascorbyl methylsilanol pectinate.

6. The first agent contains 0.80% to 3.70% by mass of (E) para-toluylenediamine, The oxidative hair dye composition according to any one of claims 1 to 5, characterized in that the mixture of the first agent and the second agent contains 0.20% by mass or more and 0.93% by mass or less of (E) p-toluylenediamine.

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