Oxidative hair dye composition and method for using same

Abstract

To provide a technique capable of promoting heat generation of a mixture of a first agent and a second agent while inhibiting color development.SOLUTION: The oxidative hair dye composition is used by mixing a first agent containing an oxidative dye and an alkali agent with a second agent containing an oxidizing agent. The mixture of the first agent and the second agent contains 0.5 mass% or more of an ascorbic acid compound in terms of ascorbic acid. When the temperatures of the first agent and the second agent before mixing are each 25°C, the temperature of the mixture is 27°C or more from 10 minutes after mixing to at least 30 minutes after mixing.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present specification relates to an oxidation hair dye composition in which a first agent and a second agent are mixed together, and a method for using the same. [Background technology]

[0002] Oxidative hair dye compositions that dye hair by oxidizing an oxidative dye on the hair to develop color have been known. A typical oxidative hair dye composition consists of a first agent containing an oxidative dye and a second agent containing an oxidizing agent, and these agents are mixed together before application to the hair.

[0003] A known technique for improving the hair dyeing power of an oxidative hair dye composition is to heat the oxidative hair dye composition by causing self-heating when the first and second agents are mixed. For example, Patent Document 1 describes that by adding an iodide to the oxidative hair dye composition, the mixture of the first and second agents generates heat, improving the hair dyeing power of the oxidative hair dye composition. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2017-197507 Summary of the Invention [Problem to be solved by the invention]

[0005] The technology of Patent Document 1 achieves high hair dyeing power by generating heat from the mixture, but has the problem that the oxidative hair dye applied to the hair develops color in a short period of time, making it difficult to visually confirm the degree of hair dyeing. This specification provides a technology that can promote the generation of heat from the mixture of the first and second agents while suppressing color development. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have found that by incorporating a predetermined amount of ascorbic acids, the reducing power of the ascorbic acids can be effectively utilized, thereby promoting heat generation in the mixture and suppressing color development. Based on this finding, the present specification provides the following means.

[0007] The first aspect disclosed in this specification is an oxidation hair dye composition that uses a mixture of a first agent containing an oxidation dye and an alkaline agent and a second agent containing an oxidizing agent. The mixture of the first agent and the second agent contains 0.5% by mass or more of ascorbic acids in terms of ascorbic acid. When the temperatures of the first agent and the second agent before mixing are each 25°C, the temperature of the mixture is 27°C or higher from 10 minutes after mixing to at least 30 minutes after mixing.

[0008] In a second aspect disclosed by the present specification, in the first aspect, the mixture may further contain 0.5% by mass or more of a chelating agent.

[0009] In a third aspect disclosed by the present specification, in the first or second aspect, the mixture may further contain 2.5 mass % or more of hydrocarbons.

[0010] A fourth aspect disclosed by the present specification is another oxidation hair dye composition that uses a mixture of a first agent containing an oxidation dye and an alkaline agent and a second agent containing an oxidizing agent. The mixture of the first agent and the second agent contains 0.5% by mass or more of ascorbic acids and 0.5% by mass or more of a chelating agent, calculated as ascorbic acid.

[0011] In a fifth aspect disclosed by the present specification, in the fourth aspect, the mixture may further contain 2.5 mass % or more of hydrocarbons.

[0012] In a sixth aspect disclosed herein, in the second, fourth, or fifth aspect, the chelating agent may include at least one of ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, hydroxyethanediphosphonic acid, and salts thereof.

[0013] A seventh aspect disclosed by the present specification is another oxidation hair dye composition that uses a mixture of a first agent containing an oxidation dye and an alkaline agent and a second agent containing an oxidizing agent. The mixture of the first agent and the second agent contains 0.5% by mass or more of ascorbic acids and 2.5% by mass or more of hydrocarbons, calculated as ascorbic acid.

[0014] In an eighth aspect disclosed herein, in the third, fifth, or seventh aspect, the hydrocarbon may include liquid paraffin.

[0015] In a ninth aspect disclosed by the present specification, in any one of the first to eighth aspects, the ascorbic acid may be blended in to suppress color development of the oxidative hair dye composition.

[0016] A tenth aspect disclosed by this specification is a method for using an oxidation hair dye composition. The method includes the step of mixing a first agent containing an oxidation dye and an alkaline agent with a second agent containing an oxidizing agent to prepare a mixture, the mixture containing 0.5% by mass or more of ascorbic acids calculated as ascorbic acid. When the temperatures of the first agent and the second agent before mixing are each 25°C, the temperature of the mixture is 27°C or higher from 10 minutes after mixing to at least 30 minutes after mixing. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the oxidative hair dye composition disclosed herein will be described below. This oxidative hair dye composition 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 of this oxidative hair dye composition contains ascorbic acids. The ascorbic acids can be added to suppress color development of the oxidative hair dye composition. The ascorbic acids may be contained in the mixture of the first and second agents. For example, they may be contained in the first agent, or in an agent separate from the first and second agents (i.e., a third agent). An embodiment in which the ascorbic acids are contained in the first agent of a two-agent oxidative hair dye will be described below.

[0018] [First agent] The first agent contains an oxidation dye, an alkaline agent, and an ascorbic acid.

[0019] [Oxidation dyes] Oxidation dyes are compounds that develop color through oxidative polymerization with an oxidizing agent and are generally classified into primary intermediates and couplers. Primary intermediates include, for example, o- or p-phenylenediamines or aminophenols, and their salts. Specific examples include p-phenylenediamine, toluene-2,5-diamine (p-toluylenediamine), N-phenyl-p-phenylenediamine, 4,4'-diaminodiphenylamine, p-aminophenol, o-aminophenol, p-methylaminophenol, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, 2-hydroxyethyl-p-phenylenediamine, o-chloro-p-phenylenediamine, 4-amino-m-cresol, 2-amino-4-hydroxyethylaminoanisole, 2,4-diaminophenol, and their salts. Salts include, for example, hydrochlorides, sulfates, acetates, and the like.

[0020] Examples of couplers include mainly m-diamines, aminophenols or diphenols, and salts thereof. Specific examples include resorcinol, pyrogallol, catechol, m-aminophenol, m-phenylenediamine, 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, 2,4-dihydroxybenzoic acid, gallic acid, tannic acid, ethyl gallate, methyl gallate, propyl gallate, Chinese gallnut, 1-methoxy-2-amino-4-(2-hydroxyethyl)aminobenzene, 5-(2-hydroxyethylamino)-2-methylphenol, and salts thereof. The oxidation dye may contain only one of these or a combination of two or more of them depending on the desired color tone.

[0021] The content of the oxidative dye in the first agent is not particularly limited and may be appropriately determined depending on the tone and shade of the desired hair color. The lower limit of the content is, for example, 0.01% by mass or more, for example, 0.1% by mass or more, for example, 0.5% by mass or more, or for example, 1% by mass or more. The upper limit of the content is, for example, 15% by mass or less, for example, 13% by mass or less, for example, 10% by mass or less, or for example, 8% by mass or less. The range of the content can be set by appropriately combining the above upper and lower limits, for example, 0.01% by mass or more and 15% by mass or less, for example, 0.1% by mass or more and 13% by mass or less, for example, 0.5% by mass or more and 10% by mass or less, or for example, 1% by mass or more and 8% by mass or less. A content of 0.01% by mass or more easily achieves sufficient hair dyeing power, while a content of less than 15% by mass increases the stability of the agent.

[0022] [Alkaline agent] The alkaline agent enhances the action of the oxidizing agent contained in the second agent, thereby improving hair brightness and swelling the hair, contributing to improved dye penetration. Examples of alkaline agents include ammonia, alkanolamines, ammonium salts, organic amines (e.g., 2-amino-2-methyl-1,3-propanediol, guanidine), inorganic alkalis (e.g., sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate), basic amino acids (e.g., arginine, lysine), and their salts. Specific examples of alkanolamines include monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, isopropanolamine, dipropanolamine, tripropanolamine, 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, inorganic ammonium salts include ammonium carbonate, ammonium hydrogen carbonate, ammonium sulfate, ammonium phosphate, and ammonium hydrogen phosphate, and organic ammonium salts include ammonium lactate, ammonium citrate, and ammonium glycolate.

[0023] The alkaline agent may contain only one of these or a combination of two or more of them. Among these, ammonia, monoethanolamine, or ammonium salts are preferably used from the viewpoint of excellent effect of improving the brightness of hair.

[0024] The content of the alkaline agent in the first agent is not particularly limited. The lower limit of the content is, for example, 0.1% by mass or more, for example, 0.2% by mass or more, for example, 0.5% by mass or more, or for example, 0.7% by mass or more. The upper limit of the content is, for example, 10% by mass or less, for example, 9.6% by mass or less, for example, 9% by mass or less, or for example, 8% by mass or less. The range of the content can be set by appropriately combining the above upper and lower limits, for example, 0.1% by mass or more and 10% by mass or less, for example, 0.2% by mass or more and 9.6% by mass or less, for example, 0.5% by mass or more and 9% by mass or less, or for example, 0.7% by mass or more and 8% by mass or less. A content of 0.1% by mass or more makes it easy to obtain sufficient brightness, and a content of less than 10% by mass makes it easy to obtain a good feel on the finished hair.

[0025] [Ascorbic acids] Ascorbic acids act as reducing agents when preparing the mixture with the second agent, and are added to promote the oxidative polymerization reaction of the oxidative dye caused by the oxidizing agent. The mixture generates heat as the ascorbic acids undergo an oxidation-reduction reaction with the oxidizing agent, resulting in high hair dyeing power. Ascorbic acids are also added to lower the pH of the mixture over time. When the first and second agents containing ascorbic acids are mixed, the pH of the mixture gradually decreases over the course of the hair dyeing process due to the action of the ascorbic acids. This allows the mixture to achieve a sustained color development inhibition effect.

[0026] Ascorbic acids have a hydroxyl group, which contributes to the reducing power of ascorbic acids. Because ascorbic acids have a moderate reducing power, when the first and second agents are mixed, the alkaline agent is gradually neutralized, and the pH of the mixture can be lowered over time. As a result, color development of the mixture is suppressed.

[0027] Examples of ascorbic acids 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, lauric acid ... Examples of suitable ascorbic acids include ascorbyl phosphate, ascorbyl acetate, ascorbyl propionate, ascorbyl tartrate, ascorbyl citrate, ascorbyl succinate, ascorbyl benzoate, potassium (ascorbyl / tocopheryl) phosphate, ethyl ascorbyl, allantoin ascorbate, chitosan ascorbate, methylsilanol ascorbate, tetradecylhexyl ascorbyl, aminopropyl ascorbyl phosphate, ascorbic acid polypeptide, ascorbyl glucoside, and ascorbyl methylsilanol pectinate. Among these, ascorbic acid, sodium ascorbate, and ascorbyl palmitate are preferred. The ascorbic acids may contain only one of these or a combination of two or more.

[0028] The lower limit of the content of ascorbic acids in the first agent is, in terms of ascorbic acid, for example, 1% by mass or more, for example, 1.5% by mass or more, for example, 2% by mass or more, or for example, 3% by mass or more. The upper limit of the content is, in terms of ascorbic acid, 20% by mass or less, for example, 16% by mass or less, for example, 12% by mass or less, or for example, 8% by mass or less. The range of the content can be set by appropriately combining the above-mentioned upper and lower limits, and is, for example, 1% by mass or more and 20% by mass or less, for example, 1.5% by mass or more and 16% by mass or less, for example, 2% by mass or more and 12% by mass or less, or for example, 3% by mass or more and 8% by mass or less.

[0029] The lower limit of the content of ascorbic acids relative to the total amount of the mixture, calculated as ascorbic acid, is, for example, 0.5% by mass or more, for example, 0.8% by mass or more, for example, 1% by mass or more, or for example, 1.5% by mass or more. The upper limit of the content is, for example, 10% by mass or less, for example, 8% by mass or less, for example, 6% by mass or less, or for example, 4% by mass or less. The range of the content can be set by appropriately combining the above-mentioned upper and lower limits, and is, for example, 0.5% by mass or more and 10% by mass or less, for example, 0.8% by mass or more and 8% by mass or less, for example, 1% by mass or more and 6% by mass or less, or for example, 1.5% by mass or more and 4% by mass or less. If the content is within the above range, the redox reaction with the oxidizing agent is sufficiently promoted, making it easy to obtain a sustained heat-generating effect and a sufficient color development suppression effect of the mixture.

[0030] [Second agent] The second agent contains an oxidizing agent.

[0031] [Oxidizing agent] The oxidizing agent oxidatively polymerizes the oxidation dye to develop color and bleaches melanin contained in the hair. Examples of the oxidizing agent include hydrogen peroxide, urea peroxide, melamine peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, hydrogen peroxide adducts of sulfates, hydrogen peroxide adducts of phosphates, and hydrogen peroxide adducts of pyrophosphates.

[0032] The oxidizing agent may contain only one of these or a combination of two or more of them. Among these, hydrogen peroxide is preferably used from the viewpoint of its excellent ability to oxidatively polymerize the oxidation dye and cause color development.

[0033] The content of the oxidizing agent in the second agent is not particularly limited, but is, for example, 0.1% by mass to 30% by mass, for example, 0.3% by mass to 25% by mass, or for example, 0.5% by mass to 20% by mass. If the content is within the above range, the oxidative dye can be easily oxidatively polymerized sufficiently, and the feel of the hair is less likely to deteriorate.

[0034] [Other ingredients] The first and / or second agents may contain other ingredients selected appropriately, such as chelating agents, hydrocarbons, water, pH adjusters (excluding ascorbic acids), water-soluble polymer compounds, surfactants, oily components (excluding hydrocarbons), etc.

[0035] [Chelating agent] The chelating agent can be blended to further suppress color development of the mixture of the first and second agents and to improve the color uniformity after dyeing. When the present oxidation hair dye composition is applied to hair, the chelating agent forms a complex with metal ions present on the hair surface. The metal ions activate the catalytic activity of the oxidizing agent. By forming a complex with the metal ions, the amount of metal ions on the hair surface is reduced, and consumption of the oxidizing agent on the hair surface is suppressed. As a result, the oxidizing agent is more likely to react inside the hair, and melanin in the hair is suitably bleached, thereby imparting good brightness to the hair. In this way, the present oxidation hair dye composition improves hair brightness, thereby achieving excellent dye uniformity.

[0036] Examples of chelating agents include ethylenediaminetetraacetic acid (EDTA, edetic acid) and its salts, hydroxyethylethylenediaminetriacetic acid (HEDTA) and its salts, diethylenetriaminepentaacetic acid (DTPA) and its salts, and hydroxyethanediphosphonic acid (HEDP, etidronic acid) and its salts. Among these, ethylenediaminetetraacetic acid and its salts, hydroxyethylethylenediaminetriacetic acid and its salts, and diethylenetriaminepentaacetic acid and its salts are preferred, with ethylenediaminetetraacetic acid and its salts being particularly preferred. The chelating agent may contain only one of these or a combination of two or more.

[0037] When a chelating agent is blended, the lower limit of the content of the chelating agent relative to the total amount of the mixture is, for example, 0.1% by mass or more, or, for example, 0.2% by mass or more, or, for example, 0.3% by mass or more, or, for example, 0.5% by mass or more, or, for example, 1% by mass or more. The upper limit of the content is, for example, 10% by mass or less, or, for example, 8% by mass or less, or, for example, 6% by mass or less, or, for example, 4% by mass or less, or, for example, 2.5% by mass or less. The range of the content can be set by appropriately combining the above-mentioned upper and lower limits, and is, for example, 0.1% by mass or more to 10% by mass or less, or, for example, 0.2% by mass or more to 8% by mass or less, or, for example, 0.3% by mass or more to 6% by mass or less, or, for example, 0.5% by mass or more to 4% by mass or less, or, for example, 1% by mass or more to 2.5% by mass or less. If the content is within the above range, the color development suppression effect of the mixture is easily obtained and the levelness of dyeing can be improved.

[0038] [Hydrocarbons] Hydrocarbons can be blended to impart suitable brightness to hair and to improve the dyeing power of the mixture, particularly the deep dyeing effect. Hydrocarbons can also be blended to make hair softer. Because hydrocarbons are hydrophobic, their incorporation into the present oxidation hair dye composition concentrates the aqueous components in the mixture. By concentrating the water-soluble oxidizing agent in the mixture, the action of the oxidizing agent on the melanin contained in the hair is enhanced, making it possible to impart suitable brightness to the hair. Furthermore, by concentrating the water-soluble oxidizing dye, the oxidative polymerization reaction of the oxidizing dye is further promoted, improving the dyeing power (i.e., the deep dyeing effect).

[0039] Examples of hydrocarbons include liquid paraffin, liquid isoparaffin, paraffin, olefin oligomer, polyisobutene, hydrogenated polyisobutene, synthetic squalane, squalane (hydrogenated squalene), polybutene, polyethylene, microcrystalline wax, petrolatum, ozokerite, and ceresin. Among these, liquid paraffin, liquid isoparaffin, squalane, and olefin oligomer are preferred, and liquid paraffin is more preferred. The hydrocarbon may contain only one of these or a combination of two or more.

[0040] When a hydrocarbon is blended, the lower limit of the hydrocarbon content relative to the total amount of the mixture is, for example, 0.5% by mass or more, for example, 1% by mass or more, for example, 1.5% by mass or more, for example, 2% by mass or more, or for example, 2.5% by mass or more. The upper limit of the content is, for example, 30% by mass or less, for example, 25% by mass or less, for example, 20% by mass or less, for example, 15% by mass or less, or for example, 10% by mass or less. The range of the content can be set by appropriately combining the above-mentioned upper and lower limits, and is, for example, 0.5% by mass or more and 30% by mass or less, for example, 1% by mass or more and 25% by mass or less, for example, 1.5% by mass or more and 20% by mass or less, for example, 2% by mass or more and 15% by mass or less, or for example, 2.5% by mass or more and 10% by mass or less. If the content is within the above range, the above-mentioned effects are easily obtained, and the oxidation hair dye composition is easily able to be easily applied to hair.

[0041] The present oxidation hair dye composition may contain the above-mentioned chelating agent and / or hydrocarbon as an essential component.

[0042] [pH adjuster] A pH adjuster may be contained to adjust the pH of the agent, and examples of the pH adjuster include citric acid, phosphoric acid, acetic acid, hydrochloric acid, sulfuric acid, nitric acid, succinic acid, levulinic acid, etc., and salts thereof.

[0043] [Water-soluble polymer compound] The water-soluble polymer compound may be blended in order to improve the ease of application of the present oxidation hair dye composition to hair and to improve the dye leveling properties of the present oxidation hair dye composition.

[0044] Examples of water-soluble polymer compounds include natural polymer compounds such as gum arabic, carrageenan, galactan, guar gum, quince seed gum, locust bean gum, tragacanth gum, pectin, mannan, starch, xanthan gum, dextran, hyaluronic acid, curdlan, succinoglucan, gelatin, collagen, casein, and albumin; cellulose-based polymer compounds such as methylcellulose, ethylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose, and methylhydroxypropylcellulose; starch-based polymer compounds such as carboxymethyl starch, methyl starch, and soluble starch; alginic acid-based polymer compounds such as alginate and propylene glycol alginate; synthetic polymer compounds such as carboxyvinyl polymer, acrylic acid-alkyl methacrylate copolymer, polyacrylic acid, sodium polyacrylate, polyacrylic acid amide, polydimethylmethylene piperidinium chloride, highly polymerized polyethylene glycol, and polyethyleneimine; and inorganic substances such as bentonite, montmorillonite, and aluminum magnesium silicate. The water-soluble polymer compound may contain only one of these, or may contain a combination of two or more of them.

[0045] When a water-soluble polymer compound is blended, its content is not particularly limited, but from the viewpoint of obtaining the above-mentioned effects, the content is, for example, 0.01% by mass or more and 5% by mass or less, or, for example, 0.05% by mass or more and 4% by mass or less, or, for example, 0.1% by mass or more and 3% by mass or less, relative to the total amount of the mixture.

[0046] [Surfactants] A surfactant may be blended in the oxidation hair dye composition to stably contain the dye component, oil component (including hydrocarbons), etc. Examples of the surfactant include nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants.

[0047] Examples of nonionic surfactants include ether-type nonionic surfactants, ester-type nonionic surfactants, and alkyl glucosides.

[0048] Examples of ether-type nonionic surfactants include POE (5.5) cetyl ether (HLB value 10.5), POE (6) cetyl ether (HLB value 10.5), POE (6) cetyl ether (HLB value 10.5), POE (7) cetyl ether (HLB value 11.5), POE (10) cetyl ether (HLB value 13.5), POE (15) cetyl ether (HLB value 15.5), POE (20) cetyl ether (HLB value 17.0), POE (23) cetyl ether (HLB value 18.0), POE (25) cetyl ether (HLB value 18.5), PO POE cetyl ethers (ceteth) such as POE (30) cetyl ether (HLB value 19.5), POE (40) cetyl ether (HLB value 20.0), POE (2) cetyl ether (HLB value 8.0), POE (4) cetyl ether (HLB value 8.4), POE (5) cetyl ether (HLB value 9.5); POE (20) stearyl ether (HLB value 18.0), POE (150) stearyl ether (HLB value 19.2), POE (4) stearyl ether (HLB value 9.0), POE (5) stearyl ether (HLB value 9.0), POE (2) stearyl POE stearyl ether (steareth) such as ether (HLB value 8.0); POE (10) behenyl ether (HLB value 10.0), POE (20) behenyl ether (HLB value 16.5), POE (30) behenyl ether (HLB value 18.0), POE (150) behenyl ether (HLB value 19.1), POE (2) behenyl ether (HLB value 4.3), POE (3) behenyl ether (HLB value 5.8), POE (5) behenyl ether (HLB value 7.0), POE (6) behenyl ether (HLB value 8.9) and other POE behenyl ethers ( Beheneth; POE (7) oleyl ether (HLB value 10.5), POE (10) oleyl ether (HLB value 14.5), POE (15) oleyl ether (HLB value 16.0), POE (20) oleyl ether (HLB value 17.0), POE (50) oleyl ether (HLB value 18.0), POE (2) oleyl ether (HLB value 4.9), POE (3) oleyl ether (HLB value 6.6), etc. POE oleyl ethers (oleths); POE (4.2) lauryl ether (HLB value 11.5), POE (9) lauryl ether (HLB value 14.5), POE (10) lauryl ether (HLB value 14.5), POE (21) lauryl ether (HLB value 19.0), POE (25) lauryl ether (HLB value 19.5), POE (2) lauryl ether (HLB value 9.5), POE (3) lauryl ether (HLB value 8.4) and other POE lauryl ethers (laureth); POE (2) myristyl ether (HLB value 5.8), POE (3) myristyl ether (HLB value 7.7) and other POE myristyl ethers; POE (2) octyldodecyl ether (HLB value 4.6), POE (5) octyldodecyl ether (HLB value 8.5) and other POE octyldodecyl ethers; POE (2) hexyldecyl ether (HLB value 5.3), POE (4) hexyl Examples include POE hexyldecyl ethers such as POE (5) isostearyl ether (HLB value 7.0), POE isostearyl ethers such as POE nonylphenyl ether, POE octylphenyl ether, POE polyoxypropylene cetyl ethers such as POE (10) POP (4) cetyl ether (HLB value 10.5), POE (20) POP (4) cetyl ether (HLB value 16.5), POE (20) POP (8) cetyl ether (HLB value 12.5), and POE (1) POP (4) cetyl ether (HLB value 9.5); and POE polyoxypropylene decyl tetradecyl ethers such as POE (12) POP (6) decyl tetradecyl ether (HLB value 8.5).

[0049] The number in parentheses following the POE notation indicates the number of moles of POE added in each compound. The HLB values ​​of each compound are listed as reference values, such as those listed in the Nikko Chemicals catalog (2014). These HLB values ​​can be measured according to "20·3·1 Measurement of HLB Values ​​by Emulsification Method" (pp. 854-855) in the "Handbook - Cosmetics and Pharmaceutical Ingredients - Revised Edition (Namitaka, March 1, 1978, Nikko Chemicals Co., Ltd.)."

[0050] Examples of ester-type nonionic surfactants include POE sorbitan fatty acid esters such as POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monopalmitate, POE sorbitan monolaurate, and POE sorbitan trioleate; glyceryl monofatty acid esters such as POE glycerol monostearate and POE glycerol monomyristate; and POE sorbitol fatty acid esters such as POE sorbitan tetraoleate, POE sorbitan hexastearate, and POE sorbitan monolaurate. The number of moles of POE added in POE sorbitan fatty acid esters and monoglyceryl monofatty acid esters is, for example, 5 or more. The number of moles of POE added in POE sorbitol fatty acid esters is, for example, 6 or more. Other ester-type nonionic surfactants include sorbitan beeswax such as POE(6)POE sorbitan beeswax, polyethylene glycol monooleate, polyethylene glycol monostearate, polyethylene glycol monolaurate, lipophilic glyceryl monooleate, lipophilic glyceryl monostearate, self-emulsifying glyceryl monostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan trioleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, sucrose fatty acid esters, decaglyceryl monolaurate, decaglyceryl monostearate, decaglyceryl monooleate, decaglyceryl monomyristate, and POE reduced lanolin.

[0051] Examples of cationic surfactants include lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, alkyltrimethylammonium chloride, cetyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium bromide, lanolin ethyl sulfate fatty acid aminopropylethyldimethylammonium, stearyltrimethylammonium saccharin, and cetyltrimethylammonium saccharin.

[0052] Examples of anionic surfactants include alkyl sulfates such as sodium laurate, POE alkyl sulfates such as sodium POE lauryl ether sulfate, alkyl sulfates such as triethanolamine lauryl sulfate, sodium stearoylmethyl taurate, triethanolamine dodecylbenzenesulfonate, sodium tetradecenesulfonate, POE lauryl ether phosphate and salts thereof, and the like.

[0053] Examples of amphoteric surfactants include alkyldiaminoethylglycine hydrochloride, N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine sodium, N-coconut oil fatty acid acyl-N'-carboxyethoxyethyl-N'-carboxyethylethylenediamine disodium, palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium, sodium laurylaminopropionate, sodium laurylaminodipropionate, triethanolamine laurylaminopropionate, coconut oil alkyl betaine, lauryl dimethylaminoacetic acid betaine, myristyl dimethylaminoacetic acid betaine, stearyl dimethylaminoacetic acid betaine, sodium stearyl dimethyl betaine, coconut oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, and lauryl hydroxysulfobetaine.

[0054] The surfactant may contain only one of these, or may contain a combination of two or more of them.

[0055] When a surfactant is added, its content is not particularly limited, but from the viewpoint of obtaining the above-mentioned effects, the lower limit of the content relative to the total amount of the mixture is, for example, 0.01% by mass or more, for example, 0.1% by mass or more, or for example, 0.5% by mass or more. The upper limit of the content is, for example, 20% by mass or less, for example, 15% by mass or less, or for example, 10% by mass or less. The range of the content can be set by appropriately combining the above-mentioned upper and lower limits, and is, for example, 0.01% by mass or more and 20% by mass or less, for example, 0.1% by mass or more and 15% by mass or less, or for example, 0.5% by mass or more and 10% by mass or less.

[0056] [Oily ingredients] Examples of oily components include higher alcohols, fats and oils, waxes, hydrocarbons, higher fatty acids, alkyl glyceryl ethers, esters, and silicones. For example, when the formulation is to be a well-emulsified liquid, it is particularly preferable to include higher alcohols.

[0057] Examples of higher alcohols include cetyl alcohol (cetanol), 2-hexyldecanol, stearyl alcohol, isostearyl alcohol, cetostearyl alcohol, oleyl alcohol, arachyl alcohol, behenyl alcohol, 2-octyldodecanol, lauryl alcohol, myristyl alcohol, decyltetradecanol, and lanolin alcohol.

[0058] 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.

[0059] Waxes include, for example, beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin.

[0060] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, 12-hydroxystearic acid, oleic acid, and lanolin fatty acids.

[0061] Alkyl glyceryl ethers include, for example, batyl alcohol, chimyl alcohol, selachyl alcohol, and isostearyl glyceryl ether.

[0062] 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 2-ethylhexanoate, pentaerythritol fatty acid esters, dipentaerythritol fatty acid esters, cetyl caprate, glyceryl tricaprylate, diisostearyl malate, dioctyl succinate, and cetyl 2-ethylhexanoate.

[0063] Examples of silicones include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, terminal hydroxyl group-modified 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.

[0064] Like the hydrocarbons described above, oily components can be blended for the purpose of making hair supple. Furthermore, oily components can be blended to make the first and second agents into a desired formulation. For example, when a cream formulation is used, the lower limit of the content of the oily component contained in the first and second agents is, for example, 1% by mass or more, for example, 3% by mass or more, or for example, 5% by mass or more. The upper limit of the content is, for example, 40% by mass or less, for example, 30% by mass or less, or for example, 20% by mass or less. The range of the content can be set by appropriately combining the above upper and lower limits, and is, for example, 1% by mass or more and 40% by mass or less, for example, 2% by mass or more and 30% by mass or less, or for example, 3% by mass or more and 20% by mass or less.

[0065] Furthermore, the first and second agents may contain, as necessary, antioxidants 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 and glycol, sugars such as sorbitol and maltose, 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 Quasi-drug Raw Materials" (published June 2006, Yakuji Nipposha).

[0066] [Dosage form] The dosage forms of the first and second agents are not particularly limited, but examples thereof include aqueous solutions, dispersions, emulsions, gels, foams, and creams. When the dosage form is an emulsion, it may be either an oil-in-water type or a water-in-oil type, but is preferably an oil-in-water type.

[0067] [Mixture] The mixture is obtained by mixing and preparing the first and second agents in a predetermined ratio. The mixing ratio of the first and second agents is not particularly limited, but for example, the mass ratio of the first agent:the second agent is 1:0.5 to 1:5. If the amount of the first agent or the second agent is greater than this mixing ratio, it may be difficult to set the content of each component in the first agent and the second agent. The mixture may further contain an agent other than the first agent and the second agent.

[0068] [Mixture temperature] As described above, in the present oxidation hair dye composition, when the first and second parts are mixed, the reducing power of ascorbic acids acts on the oxidizing agent, causing the mixture to generate heat. Specifically, in the present oxidation hair dye composition, when the temperature of each of the first and second parts before mixing is 25°C, the temperature of the mixture is 27°C or higher from 10 minutes to at least 30 minutes after mixing. In other words, the temperature of the mixture from 10 minutes to at least 30 minutes after mixing is 2°C or higher than the temperatures of the first and second parts before mixing. For example, the temperatures of the mixture 10 minutes, 20 minutes, and 30 minutes after mixing are all 27°C or higher. The temperature of the mixture from 10 minutes to at least 30 minutes after mixing may be, for example, 28°C or higher, or 29°C or higher. In this way, the temperature of the mixture is continuously elevated after mixing, thereby achieving high hair dyeing power. Furthermore, in the present oxidation hair dye composition, when the temperatures of the first and second parts before mixing are each 25° C., the temperature of the mixture from 10 minutes to at least 30 minutes after mixing is, for example, 40° C. or lower, for example, 37.5° C. or lower, or for example, 35° C. If the temperature of the mixture is 40° C. or lower, color development of the mixture can be suitably suppressed.

[0069] [Method of using the oxidation hair dye composition] As described above, in this embodiment, the ascorbic acids are contained in the first agent. Therefore, similar to conventional oxidative hair dye compositions, the oxidative hair dye composition is used by mixing a first agent containing an oxidative dye, an alkaline agent, and an ascorbic acid with a second agent containing an oxidizing agent to prepare a mixture, and applying the mixture to hair. This method of use may be used to suppress the color development of such an oxidative hair dye composition. Note that when the ascorbic acids are not contained in the first agent (i.e., when the ascorbic acids are contained in an agent different from the first and second agents), the different agent can be mixed with the first and second agents to prepare a mixture.

[0070] The first and second agents may be mixed by an appropriate method depending on the formulation. For example, if the formulation is a cream, they may be mixed on a plate using a mixer such as a brush. Alternatively, the first and second agents may be supplied to a comb, applied directly to the hair, and then mixed on the hair using the comb. For example, if the formulation is an aqueous solution or emulsion, the first and second agents may be placed in a container and mixed by shaking, or may be placed in a non-aerosol foamer container and mixed to form a foam. [Example]

[0071] Next, the present invention will be described in more detail with reference to examples and comparative examples, although the present invention is not limited to the examples described below.

[0072] (Examples 1 to 23, Comparative Examples 1 to 5) In each example, a first agent and a second agent were prepared by mixing the components shown in Tables 1 and 2. The numerical values ​​in the columns showing each component in Tables 1 and 2 indicate the content of the component in that column in the agent, and the units are % by mass.

[0073] [Table 1]

[0074] [Table 2]

[0075] <Evaluation of temperature changes> The first and second parts prepared in each example were placed in a thermostatic bath at 25°C and adjusted to 25°C. Next, 10 g of the adjusted first and second parts were mixed using a brush to prepare 20 g of an oxidation hair dye composition. After mixing, the oxidation hair dye composition was placed in a thermostatic bath at 25°C, and the temperature of the oxidation hair dye composition was measured 10 minutes, 20 minutes, and 30 minutes after mixing. The temperature change of the oxidation hair dye composition was evaluated based on the following criteria. The results are shown in Tables 1 and 2. 5: The temperature at each measurement time is 29°C or higher. 4: The temperature at each measurement time was 28°C or higher (excluding rating 5). 3: The temperature at each measurement time was 27°C or higher (excluding ratings 4 and 5). 2: The temperature at each measurement time was 26°C or higher (excluding ratings 3 to 5). 1: Any of the temperatures at each measurement time was below 26°C (excluding ratings 2 to 5).

[0076] For Examples 1 to 4 and Comparative Examples 1 to 4, the average temperature at each time was calculated, and the difference between this average temperature and the temperature before mixing was taken as the temperature rise. The results are shown in Table 3.

[0077] [Table 3]

[0078] <Evaluation of color development inhibition> The first and second agents prepared in each example were mixed in a 1:1 ratio to prepare a creamy mixture. The prepared mixture was left to stand for 20 minutes, and then visually inspected by 10 expert panelists to evaluate whether color development of the mixture was suppressed. For Table 1 (Examples 1-13 and Comparative Examples 1-4), a control was prepared by leaving a mixture of the composition of Example 1 but without ascorbic acid for 20 minutes, and each example was compared to the control to evaluate whether color development of the mixture was suppressed. For Table 2 (Examples 14-23 and Comparative Example 5), a control was prepared by leaving a mixture of the composition of Example 1 but without ascorbic acid for 20 minutes, and each example was compared to the control to evaluate whether color development of the mixture was suppressed. Compared to the corresponding control, the results were scored on a 5-point scale: significantly suppressed (5 points), significantly suppressed (4 points), slightly suppressed (3 points), not much suppressed (2 points), and not at all suppressed (1 point). The scores from each panelist were averaged and rounded to the nearest whole number to obtain the score. The results are shown in Tables 1 and 2.

[0079] <Brightness evaluation> The first and second agents prepared in each example were mixed in a 1:1 ratio, and 2 g of the mixture was applied using a brush to 1 g of a 10 cm long black hair bundle (manufactured by Beaulux) for evaluation, and left to stand at 30°C for 30 minutes. The mixture adhering to the hair bundle was then rinsed with water, washed with shampoo (Bigen Treatment Shampoo manufactured by Hoyu Co., Ltd.), and the hair bundle was dried with warm air to prepare an evaluation sample. Each evaluation sample was visually inspected by 10 expert panelists and evaluated for brightness. The panelists scored the samples on a five-point scale: excellent brightness (5 points), excellent brightness (4 points), good brightness (3 points), poor brightness (2 points), and very poor brightness (1 point). The average of the scores from each panelist was calculated, and the evaluation results were determined as follows: an average of 4 points or more was marked as "◎", an average of 3 points or more but less than 4 points was marked as "○", an average of 2 points or more but less than 3 points was marked as "△", and an average of less than 2 points was marked as "×". The results are shown in Tables 1 and 2.

[0080] <Evaluation of dyeing uniformity> The first and second agents prepared in Examples 1 to 13 and Comparative Examples 1 to 4 were mixed in a 1:1 ratio, and 2 g of the mixture was applied using a brush to 1 g of a 10 cm long black and white hair bundle for evaluation (manufactured by Bealux, white hair: black hair = 1:1), and left to stand at 30°C for 30 minutes. Next, the mixture adhering to the hair bundle was rinsed with water, washed with shampoo (Bigen Treatment Shampoo manufactured by Hoyu Co., Ltd.), and the hair bundle was dried with warm air to prepare an evaluation sample. Each evaluation sample was visually inspected by 10 expert panelists and evaluated for dye uniformity (combination of white and black hair and uneven dyeing). The dyeing levelness was scored on a five-point scale: very excellent dyeing levelness (5 points), excellent dyeing levelness (4 points), good dyeing levelness (3 points), poor dyeing levelness (2 points), and very poor dyeing levelness (1 point). The average of the scores of each panelist was calculated, and the average score of 4 points or more was marked as "◎", 3 points or more but less than 4 points as "○", 2 points or more but less than 3 points as "△", and less than 2 points as "×" to represent the evaluation results. The results are shown in Tables 1 and 2.

[0081] <Evaluation of deep dyeing> The first and second agents prepared in Examples 14 to 23 and Comparative Example 5 were mixed in a 1:1 ratio, and 2 g of the mixture was applied to 1 g of a 10 cm long white hair bundle (manufactured by Bealux) for evaluation using a brush, and left to stand at 30°C for 30 minutes. Next, the mixture adhering to the hair bundle was rinsed with water, washed with shampoo (Bigen Treatment Shampoo manufactured by Hoyu Co., Ltd.), and the hair bundle was dried with warm air to prepare an evaluation sample. Each evaluation sample was visually inspected by 10 expert panelists to evaluate the deep dyeing ability. The dyeing was scored on a five-point scale: very good (5 points), good (4 points), good (3 points), poor (2 points), and very poor (1 point). The panelists' scores were averaged, and an average of 4 points or more was marked with "◎", 3 points or more but less than 4 points with "○", 2 points or more but less than 3 points with "△", and less than 2 points with "×". The results are shown in Tables 1 and 2.

[0082] As shown in Tables 1 and 2, Examples 1 to 23 exhibited favorable temperature change and favorable color development suppression effects. First, examining the components (A) and (a) in Tables 1 and 2, Comparative Examples 1 and 5 did not contain component (A) (ascorbic acids). This is thought to be due to the low reducing power of the first agent, which prevented the generation of heat due to the oxidation-reduction reaction with the oxidizing agent and the suppression of color development of the mixture due to neutralization of the alkaline agent. Furthermore, in Comparative Example 2, sodium sulfite was used as component (a) instead of component (A). Because sodium sulfite has low reducing power, slight heat generation was observed after mixing, as shown in Table 3, but it was difficult to maintain a high temperature, resulting in a low evaluation of temperature change. Furthermore, in Comparative Example 3, potassium iodide was used as component (a) instead of component (A). In Comparative Example 3, the incorporation of potassium iodide allowed the mixture to maintain a high temperature, but did not suppress color development of the mixture. In Comparative Example 4, phosphoric acid was blended as component (a) instead of component (A), but no heat was generated after mixing, and color development of the mixture was not suppressed, as shown in Table 3. A comparison of Examples 1, 3, and 4, which differ only in the content of ascorbic acids, and a comparison of Examples 16, 19, and 20, showed that a relatively high content of ascorbic acids showed better temperature change and color development suppression effects.

[0083] Next, examining the component (B) (i.e., the chelating agent) in Table 1, Examples 5 to 13, which contained a chelating agent, showed favorable evaluation results for both brightness and dyeing levelness compared to other examples that did not contain a chelating agent. As described above, the chelating agent forms a complex with metal ions present on the hair surface, thereby suppressing the consumption of the oxidizing agent on the hair surface. As a result, it is believed that the oxidizing agent easily penetrates into the hair without reacting and acts favorably on the melanin in the hair, thereby imparting a favorable brightness to the hair. Furthermore, it is believed that the improved brightness of the hair reduced the contrast between the white and black hairs in the hair bundle, resulting in excellent dyeing levelness. Even in Comparative Example 1, which contained a chelating agent, the evaluations of brightness and dyeing levelness were high, which shows that the inclusion of a chelating agent can impart a favorable brightness to the hair and achieve high dyeing levelness.

[0084] Next, examining component (C) (i.e., hydrocarbon) in Table 2, Examples 15 to 23, which contained hydrocarbons, showed better brightness results than Example 14, which did not contain hydrocarbons. As mentioned above, hydrocarbons are hydrophobic, so when they are added to a mixture, the aqueous components in the mixture are concentrated. As a result, the water-soluble oxidizing agent is concentrated in the mixture, increasing the action of the oxidizing agent on the melanin contained in the hair, which is thought to have been able to impart a suitable brightness to the hair. Furthermore, a comparison of Examples 15 to 23 shows that a relatively high hydrocarbon content can impart better brightness.

[0085] Furthermore, a comparison of Examples 16 and 17, which differ only in the hydrocarbon content, and Examples 21 and 22 reveals that a higher hydrocarbon content leads to improved deep dyeing. This is thought to be because a higher hydrocarbon content leads to a more concentrated water-soluble oxidative dye in the mixture, further accelerating the oxidative polymerization reaction of the oxidative dye. Although Example 19 contains a sufficient amount of hydrocarbon, the deep dyeing performance was rated "Good." This is thought to be due to the relatively low ascorbic acid content. These results demonstrate that the inclusion of hydrocarbons can impart a suitable brightness to hair and achieve high deep dyeing performance. As is clear from the results of Examples 15 to 23, hydrocarbons may be contained in either the first or second agent.

[0086] Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples exemplified above. The technical elements described in this specification or drawings exhibit technical utility either alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technology exemplified in this specification or drawings can achieve multiple objectives simultaneously, and achieving one of these objectives is itself technically useful.

Claims

1. An oxidation hair dye composition comprising a first agent containing an oxidation dye and an alkaline agent and a second agent containing an oxidizing agent, the mixture of the first agent and the second agent contains 0.5% by mass or more of ascorbic acids in terms of ascorbic acid, When the temperature of each of the first part and the second part before mixing is 25°C, the temperature of the mixture is 27°C or higher from 10 minutes to at least 30 minutes after mixing. Oxidative hair dye composition.

2. The oxidative hair dye composition according to claim 1 , wherein the mixture further contains 0.5% by mass or more of a chelating agent.

3. The oxidation hair dye composition according to claim 1 , wherein the mixture further contains 2.5% by mass or more of a hydrocarbon.

4. An oxidation hair dye composition comprising a first agent containing an oxidation dye and an alkaline agent and a second agent containing an oxidizing agent, The mixture of the first agent and the second agent contains 0.5% by mass or more of ascorbic acids and 0.5% by mass or more of a chelating agent, calculated as ascorbic acid.

5. The oxidation hair dye composition according to claim 4, wherein the mixture further contains 2.5% by mass or more of a hydrocarbon.

6. 6. The oxidative hair dye composition according to claim 2, 4, or 5, wherein the chelating agent comprises at least one of ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, hydroxyethanediphosphonic acid, and salts thereof.

7. An oxidation hair dye composition comprising a first agent containing an oxidation dye and an alkaline agent and a second agent containing an oxidizing agent, The mixture of the first agent and the second agent contains 0.5% by mass or more of ascorbic acids and 2.5% by mass or more of hydrocarbons, calculated as ascorbic acid. Oxidative hair dye composition.

8. 8. The oxidation hair dye composition according to claim 3, 5, or 7, wherein the hydrocarbon comprises liquid paraffin.

9. The oxidative hair dye composition according to claim 1, wherein the ascorbic acid compound is blended to suppress color development of the oxidative hair dye composition.

10. A method of using an oxidation hair dye composition, comprising: a step of mixing a first agent containing an oxidation dye and an alkaline agent with a second agent containing an oxidizing agent to prepare a mixture, the mixture containing 0.5% by mass or more of ascorbic acids in terms of ascorbic acid; When the temperature of each of the first part and the second part before mixing is 25°C, the temperature of the mixture is 27°C or higher from 10 minutes to at least 30 minutes after mixing. How to use.

Images