WO2023234325A1 - Colorant capillaire d'oxydation par l'air - Google Patents

Colorant capillaire d'oxydation par l'air Download PDF

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Publication number
WO2023234325A1
WO2023234325A1 PCT/JP2023/020201 JP2023020201W WO2023234325A1 WO 2023234325 A1 WO2023234325 A1 WO 2023234325A1 JP 2023020201 W JP2023020201 W JP 2023020201W WO 2023234325 A1 WO2023234325 A1 WO 2023234325A1
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Prior art keywords
hair
component
agent
hair dye
air oxidation
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PCT/JP2023/020201
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English (en)
Japanese (ja)
Inventor
真実 楠見
芽生 安永
紗也 水野
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ホーユー株式会社
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Priority claimed from JP2022108717A external-priority patent/JP2023177188A/ja
Priority claimed from JP2023087235A external-priority patent/JP2023184460A/ja
Application filed by ホーユー株式会社 filed Critical ホーユー株式会社
Publication of WO2023234325A1 publication Critical patent/WO2023234325A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/41—Amines
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/67—Vitamins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/10—Preparations for permanently dyeing the hair

Definitions

  • the present invention relates to an air oxidation hair dye that uses a precursor of melanin, a hair pigment, as an oxidation dye and polymerizes and develops color through air oxidation.
  • This invention relates to an air oxidation type hair dye in which a mixture is simultaneously applied to the hair.
  • 5,6-dihydroxyindole, 5,6-dihydroxyindoline, etc. are called melanin precursors and become melanin by polymerizing and developing color through air oxidation. Taking advantage of this point, air oxidation type hair dyes that do not contain an oxidizing agent have been provided.
  • Patent Document 1 discloses a one-component air oxidation type hair dye composition containing an indoline derivative or a salt thereof represented by a predetermined general formula and an amine or a salt thereof as essential components. According to Patent Document 1, by adjusting the pH of the composition within the range of 8.5 to 11, a one-component hair dye composition that has excellent hair dyeing power and can dye hair black without redness is produced. It is said that it can be provided.
  • Patent Document 2 discloses an air oxidation type agent comprising an agent A having a pH of 3 to 8 containing 5,6-dihydroxyindole or its salts and ascorbic acid or its salts, and an agent B having a pH of 8 to 11 containing an alkaline agent etc.
  • a two-component hair dye is disclosed. When using this two-part hair dye, it is a "two-coat" method in which part A is first applied to the hair, left for a while, then this is wiped off and part B is applied to the hair.
  • the oxidative polymerization reaction of melanin precursors is said to have a certain pH dependence, and it is generally considered that a pH range of about 8 to 11 is preferable.
  • Patent Document 3 contains melanin precursors such as 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid represented by a predetermined general formula, as well as a specific reducing agent, metal salt, etc. as essential components.
  • a one-part air oxidation hair dye composition is disclosed. According to Patent Document 3, it is possible to change the color of the dyed product by using a melanin precursor, the above-mentioned reducing agent, metal salt, etc., without using a coupler.
  • the air oxidation type hair dye described in Patent Document 1 is a one-component type, the operation during use is relatively simple.
  • the melanin precursor is already contained in an alkaline agent, even if a reducing agent such as ascorbic acid is added to the agent, the oxidative polymerization reaction of the melanin precursor will proceed to some extent during storage (before use). , there is a risk of polymerization. Since polymerized melanin does not penetrate into the hair, it easily falls off from the hair when washed with water after hair dyeing, resulting in poor hair dyeing power.
  • the air oxidation type hair dye described in Patent Document 2 is configured as a two-component type and the melanin precursor is contained in an acidic agent, the polymerization reaction of the melanin precursor before use is possible. (polymerization) can be avoided.
  • the acidic agent is wiped off from the hair surface, and a separately prepared alkaline agent is applied to the hair to oxidize the melanin precursor. Can cause polymerization reactions.
  • the two-component air oxidation hair dye described in Patent Document 2 avoids the problem of "polymerization of the melanin precursor before use" in the one-component hair dye described in Patent Document 1.
  • the present invention consists of an air oxidation type hair dye in a multi-component format, which prevents the polymerization of melanin precursors before use, and which also provides satisfactory hair dyeing power even when each component is applied to the hair at the same time.
  • the technical problem to be solved is to make this possible.
  • Another challenge is to provide a wide range of color variations for air oxidation hair dyes.
  • the first invention of the present application for solving the above problem is composed of an acidic agent containing the following component (A) and an alkaline agent containing the following component (B), and each agent is applied to the hair at the same time.
  • It is a multi-component hair dye, and is an air oxidation type hair dye in which the total alkalinity of each component is 3.0 ml/g or less when mixed.
  • total alkalinity is a parameter that means the amount of acid-consuming components in the sample or the amount of free [OH - ] derived from alkali in the sample. Specifically, it refers to the amount of hydrochloric acid in mL units required when 1 g of a mixed solution of each agent as a sample is neutralized and titrated with 0.1N hydrochloric acid. Note that a mixture of each agent may exhibit multiple neutralization points depending on the type of alkaline compound or due to the combination of two or more types of alkaline compounds. It refers to the amount in mL of the above hydrochloric acid consumed up to the neutralization point.
  • “simultaneous application” refers to a state in which an acidic agent and an alkaline agent are applied to the hair together, and for that purpose, both agents may be mixed in advance and applied to the hair, or they may be mixed together. Both agents may be applied to the hair one after another.
  • the basic difference from the invention described in Patent Document 2 is that there is no need to wipe off the acidic agent (agent A) before applying the alkaline agent (agent B).
  • multi-component hair dyes include two-component hair dyes consisting of an acidic agent containing component (A) and an alkaline agent containing component (B), as well as hair dyes that are a two-component formula containing an acidic agent containing component (A) and an alkaline agent containing component (B). Also included are multi-component hair dyes containing one or more other agents that are mixed together with the two-component hair dye during simultaneous application. When applied to hair, additional agents that do not need to be applied simultaneously with the above-mentioned acidic or alkaline agents may or may not be a component of the hair dye of the first invention. .
  • the melanin precursor that is component (A) includes oxidative polymerization by air oxidation other than 5,6-dihydroxyindole, 5,6-dihydroxyindoline, or their -2-carboxylic acid derivatives listed in the second invention below. It includes various derivatives and salts thereof that retain the property of coloring when exposed to water.
  • the pH is within the range of 8 to 11 at the time of mixing of each agent of the air oxidation type hair dye according to the first invention.
  • any one or more of the air oxidation hair dyes according to the first invention or the second invention contains the following component (C).
  • air oxidation hair dyes include two-component hair dyes, one or more of which contains component (C), as well as two-component hair dyes that can be applied simultaneously to the hair. Also included are multi-component hair dyes containing one or more other agents that may or may not contain component (C), which are mixed together with the two-component hair dye at the time of the step.
  • the component (A) according to any one of the first to third inventions is 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid. , 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and salts thereof.
  • the component (B) according to any one of the first to fourth inventions includes carbonate and/or bicarbonate.
  • the present invention it is possible to prevent the polymerization of the melanin precursor before use, and to obtain sufficient hair dyeing power by simultaneously applying each of the agents.
  • the air oxidation type hair dye of the present invention uses a precursor of melanin, which is a hair pigment, and polymerizes and develops color through air oxidation.
  • This hair dye is a two-component or more multi-component formula containing at least an acidic agent containing a melanin precursor as the component (A) and an alkaline agent containing an alkaline compound as the component (B). be done.
  • the acidic agent containing the melanin precursor as the component (A) and the alkaline agent containing the alkaline compound as the component (B) are applied to the hair after mixing in a "simultaneous application" method, or applied sequentially to the hair without mixing.
  • At least one agent of the air-oxidized hair dye contains a polymer having a cationic group, which is component (C).
  • Hair dyes are usually two-part formulas, but there are many, for example, three-part formulas in which a third part of an appropriate composition that does not contain either component (A) or component (B) is added as an optional component. It may also be used as a pharmaceutical formula.
  • the mixing ratio of the alkaline agent and the acidic agent in the two-component hair dye is set appropriately, and when mixing each agent, the total alkalinity is 3.0 ml/g or less, preferably the pH is 8.
  • alkaline agent: acidic agent may be set arbitrarily within the range of 1:5 to 5:1 on the premise that the ratio is within the range of 1:1 to 11. :1.5, 1.5:1, etc. may be used.
  • each agent is not limited, but a liquid dosage form based on water is preferred.
  • a part of each agent can also be in the form of powder or granules.
  • liquid dosage forms include, but are not limited to, solubilized products (solutions), emulsified liquids, gels, creams, and the like. Particularly preferred are emulsified liquids and creams. It is also preferable to use it by discharging it in the form of a cream using an aerosol method or in the form of a foam together with a propellant.
  • the aerosol container When using an aerosol type air oxidation type hair dye, the aerosol container must be equipped with a container filled with an acidic agent and a container filled with an alkaline agent, and be capable of discharging the acidic agent and the alkaline agent at the same time. preferable.
  • the discharge mechanism of an aerosol container is, for example, a pair of containers filled with a propellant such as dimethyl ether, liquefied petroleum gas, or nitrogen gas, and capable of discharging the contents (acidic agent, alkaline agent) from the stem by the pressure of the propellant.
  • a device that includes aerosol cans, a member that connects these aerosol cans, an operating member that simultaneously presses the stems of a pair of aerosol cans from the outside, and a discharge member that discharges the contents discharged from the stems to the outside. is exemplified.
  • two inner bags each filled with an acidic agent and an alkaline agent are housed inside one aerosol can filled with a propellant with a stem, and these inner bags always maintain the same discharge pressure.
  • a double-walled aerosol container of the separately filled and pressurized type configured to receive the air.
  • the air oxidation type hair dye of the present invention preferably has a pH within the range of 8 to 11, more preferably within the range of 9 to 10, at the time of mixing (when using) each agent.
  • the pH at the time of mixing each component of the air oxidation type hair dye of the present invention is a value measured immediately after diluting the mixture of each component to 10% with water.
  • a pH meter such as pH-METER F-22 manufactured by HORIBA.
  • the acidic agent has a pH of about 3 to 7, more preferably about 3 to 5, from the viewpoint of storage stability of the melanin precursor it contains.
  • the alkaline agent is preferably adjusted so that the pH of the hair dye is within the range of 8 to 11 when each agent is mixed.
  • the hair dye must have a total alkalinity of 3.0 ml/g or less, more preferably 2.5 ml/g or less, and particularly preferably 2.5 ml/g or less when mixing each agent. It should be 2.0ml/g or less.
  • the lower limit of total alkalinity is not limited, but is preferably 0.4 ml/g or more, more preferably 0.8 ml/g or more, particularly preferably 1.2 ml/g or more.
  • the acidic agent contains a melanin precursor, which is component (A).
  • the types of melanin precursors are not limited, but include 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and these One or more types selected from salts are preferable, and one or more types selected from 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and salts thereof are more preferable.
  • salts examples include hydrochloride, hydrobromide, phosphate, sulfate, acetate, lactate, citrate, etc. Among them, hydrobromide, hydrochloride, phosphoric acid salt, etc. Salts, sulfates or lactates are preferred.
  • the content of component (A) in the acidic agent is not limited, but is preferably 0.001% by mass or more, more preferably 0.01% by mass or more when mixing each agent. Further, the content of component (A) when mixing each agent is preferably 2.0% by mass or less, more preferably 1.5% by mass or less. When the content of component (A) is 0.001% by mass or more when mixing each agent, the hair dyeing power is excellent, and when the content is 2.0 mass% or less, the proportion of component (A) polymerized outside the hair is low. Therefore, it becomes easier to obtain a hair dyeing effect according to the blending amount of component (A).
  • the acidic agent can contain a pH adjuster to adjust the pH to about 3 to 7, and a reducing agent to improve the storage stability of component (A).
  • a pH adjuster various acids such as hydrochloric acid, orthophosphoric acid, phosphoric acid, tartaric acid, citric acid, and lactic acid can be used.
  • alkalis such as sodium hydroxide, ammonia, and alkylamines can also be used as appropriate.
  • the reducing agent ascorbic acid, sulfite, L-cysteine, thioglycolic acid, salts thereof, etc. can be used.
  • the content of the reducing agent in the acidic agent is not limited, but is preferably 0.001% by mass or more, particularly preferably 0.01% by mass or more. Further, the content of the reducing agent in the acidic agent is preferably 1% by mass or less, particularly preferably 0.5% by mass or less.
  • the hair dye of the present invention does not contain oxidizing agents such as hydrogen peroxide, sodium percarbonate, potassium perborate, ammonium persulfate, sodium peroxide, hydrogen peroxide adducts of sulfates, and ammonium persulfate in acidic agents. . Even if an oxidizing agent is contained, the content is 1% by mass or less in the acidic agent, preferably 0.5% by mass or less.
  • the alkaline agent contains an alkaline compound which is component (B).
  • component (B) the type of alkali compound is not limited, in addition to ammonia, carbonate and hydrogen carbonate (bicarbonate) can be preferably used as the electrolyte alkali compound.
  • the hair dyeing power of these electrolyte alkaline compounds differs depending on the counter ion species, and from the viewpoint of hair dyeing power, metal salts are preferable to ammonium salts, and as metal salts, sodium salts, potassium salts, calcium salts, and magnesium salts are preferable. , sodium salt, and potassium salt are particularly preferred.
  • the total content of carbonate and/or bicarbonate is preferably 0.001% by mass or more, particularly preferably 0.01% by mass or more when mixing each agent.
  • the total content of carbonates and/or bicarbonates is preferably 1.5% by mass or less, more preferably 1.0% by mass or less, and particularly preferably 0.8% by mass or less.
  • Preferred embodiments of the alkaline compound include a combination of ammonia such as 28% aqueous ammonia and sodium carbonate, a combination of ammonia, sodium carbonate and sodium hydrogen carbonate (sodium bicarbonate), a combination of ammonia and ammonium hydrogen carbonate, and a combination of sodium carbonate and hydrogen carbonate.
  • An example is the combined use of sodium.
  • the content of the alkali compound is not limited, but from the viewpoint of ensuring polymerization of the melanin precursor, it is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, particularly preferably 0.01% by mass or more when mixing the agent. .5% by mass or more.
  • the content of the alkali compound at the time of mixing the agent is preferably 2.5% by mass or less, more preferably 2.0% by mass or less, particularly preferably 1.0% by mass or less. It is 8% by mass or less.
  • alkaline compounds other than ammonia, carbonates, and bicarbonates include alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, aminomethylpropanol, and isopropylamine.
  • alkaline compounds include silicates such as sodium silicate and potassium silicate.
  • alkaline compounds include various metasilicates, phosphates, basic amino acids, hydroxides, and the like.
  • the alkaline agent can also contain direct dyes to enhance the hair dyeing effect.
  • the type of direct dye is not limited, but examples include acid dyes, nitro dyes, disperse dyes, and basic dyes.
  • Examples of acidic dyes include Black No. 401, Orange No. 205, Red No. 227, Red No. 106, Yellow No. 203, Blue No. 1, Purple No. 401, and Acid Orange 3, and examples of nitro dyes include 2-nitroparaphenylene.
  • Examples of disperse dyes include diamine, 2-amino-6-chloro-4-nitrophenol, 4-nitroorthophenylenediamine, HC blue 2, HC orange 1, HC red 13, HC yellow 4, and HC yellow 2. Examples include Dispersed Purple 1, Dispersed Blue 1, and Dispersed Black 9.
  • Basic dyes include Basic Brown 16, Basic Brown 17, Basic Red 76, Basic Red 51, Basic Yellow 57, and Basic Yellow 87. etc. are exemplified. Among these, it is preferable to contain one or more selected from acid dyes and/or nitro dyes from the viewpoint of hair dyeing power, and one or more selected from HC Red 13, HC Yellow 4, and HC Yellow 2. It is particularly preferable.
  • one or more of the acidic agent, alkaline agent, or other agent mixed with these agents during use contains a polymer having a cationic group, which is component (C).
  • the polymer having a cationic group include cationic polymers and amphoteric polymers.
  • Cationic polymers have the effect of improving the feel of hair.
  • an amphoteric polymer such as Marquat 3330 (polyquaternium-39)
  • the feel improvement effect is inferior to that of a cationic polymer such as Marquat 100 (polyquaternium-6), but hair dyeing Excellent strength improvement effect.
  • the molecular weight of the cationic polymer is not limited, but is preferably 10,000 or more, more preferably 100,000 or more, and particularly preferably 140,000 or more.
  • the cation density (meq/g) of the cationic polymer is not limited, but is preferably 25 or less, more preferably 15 or less, and particularly preferably 8 or less.
  • the reason why the hair dyeing power can be improved when the above-mentioned cationic polymer with a molecular weight of 10,000 or more is blended is that when the degree of polymerization of the polymer is high, it inhibits the polymerization of melanin precursors, resulting in a bluish color. It is presumed that this is because the melanin has a high degree of polymerization, making it appear darkly colored.
  • hair dyeing power can be improved when a cationic polymer with a cationic density (meq/g) of 25 or less is blended is that theoretically, the lower the cationic charge density, the less likely hair dyeing inhibition will occur due to ion complexes. It is presumed that this is because of this.
  • the content ratio (A)/(C) of (C) a polymer having a cationic group and (A) a melanin precursor when mixing the air oxidation type hair dye of the present invention is determined from the viewpoint of hair dyeing power. It is preferably 0.001 or more, more preferably 0.1 or more, and particularly preferably 5 or more. On the other hand, from the viewpoint of feel, the content ratio (A)/(C) is preferably 25 or less, more preferably 20 or less, and particularly preferably 15 or less.
  • cationic polymers include polymers such as cationized cellulose derivatives, cationic starches, cationized guar gum derivatives, diallyl quaternary ammonium salt/acrylamide copolymers, and quaternized polyvinylpyrrolidone derivatives. , diallyldimethylammonium chloride, polydimethylmethylenepiperidinium chloride, and the like.
  • the content of (C) the polymer having a cationic group when mixing the air oxidation type hair dye is not limited, but is preferably within the range of 0.01 to 5% by mass, more preferably 0.05% when mixing each agent. It is within the range of ⁇ 2% by mass.
  • the acidic agent, alkaline agent, or other agent constituting the air-oxidation hair dye may optionally contain the following higher alcohols, surfactants, oily components, water-soluble solvents, and the like.
  • higher alcohols examples include lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, oleyl alcohol, aracyl alcohol, behenyl alcohol, octyldodecanol, and the like.
  • surfactant examples include cationic surfactants, nonionic surfactants, anionic surfactants, and amphoteric surfactants.
  • Cationic surfactants include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride (cetrimonium chloride), stearyltrimethylammonium chloride, alkyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium bromide, and stearyltrimethylammonium bromide.
  • nonionic surfactants include polyoxyethylene (hereinafter referred to as "POE") cetyl ether, POE stearyl ether, POE sorbitan monooleate, POE methyl glucoside, and examples of cationic surfactants include alkyl trimethyl. Examples include ammonium or its salt, dialkyldimethylammonium or its salt, ethyl sulfate lanolin fatty acid aminopropylethyldimethylammonium, etc. Examples of the anionic surfactant include alkyl ether sulfate, alkyl sulfate, alkyl ether sulfate ester salt, etc. Examples of amphoteric surfactants include lauramidopropyl betaine and coconut oil fatty acid amidopropyl betaine.
  • nonionic surfactants POE-added nonionic surfactants with short ethylene oxide chains improve the hair dyeing power of the hair dye of the present invention.
  • the number of moles of ethylene oxide added is preferably 100 or less, more preferably 50 or less.
  • oily components include waxes, hydrocarbons, vegetable oils, animal oils, ester oils, fatty acids, and silicones.
  • waxes include beeswax, lanolin, candelilla wax, and carnauba wax.
  • hydrocarbons include paraffin, microcrystalline wax, vaseline, light liquid isoparaffin, and liquid paraffin.
  • vegetable oils include avocado oil, olive oil, sunflower oil, safflower oil, camellia oil, soybean oil, macadamia nut oil, and castor oil.
  • animal oils include mink oil, sardine oil, cod liver oil, mutton tallow, beef tallow, pork fat, and egg yolk oil.
  • ester oil examples include diisopropyl adipate, isopropyl myristate, myristyl myristate, cetyl octoate, and the like.
  • fatty acids examples include lauric acid, myristic acid, 12-hydroxystearic acid, and oleic acid.
  • silicones include dimethylpolysiloxane (INCI name: dimethicone), dimethylpolysiloxane having a hydroxy end group (INCI name: dimethiconol), methylphenylpolysiloxane, polyether-modified silicone, amino-modified silicone, and the like.
  • water-soluble solvents examples include polyhydric alcohols and lower alcohols.
  • Polyhydric alcohols and lower alcohols improve the hair dyeing power of air oxidation hair dyes.
  • the polyhydric alcohol propylene glycol, polyethylene glycol, and ethoxy diglycol are preferred, and as the lower alcohol, ethanol is preferred, but polyethylene glycol is particularly preferred.
  • the air oxidation type hair dye of the present invention contains preservatives such as sodium benzoate, organic solvents, sugars such as sorbitol and maltose, water-soluble polymers such as hydroxyethylcellulose and carboxyvinyl polymer,
  • preservatives such as sodium benzoate, organic solvents, sugars such as sorbitol and maltose, water-soluble polymers such as hydroxyethylcellulose and carboxyvinyl polymer
  • chelating agents such as tetrasodium ethanediphosphonate solution, inorganic salts such as sodium chloride, hair growth ingredients, plant extracts, crude drug extracts, amino acids, peptides, urea, vitamins, fragrances, ultraviolet absorbers, etc. can do.
  • the air oxidation type hair dye is constituted as a multi-component type, and the acidic agent among them contains the melanin precursor, which is the component (A).
  • the melanin precursor which is the component (A).
  • an acidic agent is applied simultaneously with an alkaline agent to create conditions for the oxidative polymerization reaction of the melanin precursor. If the total alkalinity is 3.0 ml/g or less when mixing each agent, as mentioned above in connection with Patent Document 2, "low molecular weight melanin precursors may not fully penetrate into the hair, resulting in high alkalinity due to oxidative polymerization reaction.” The problem of "molecularization progresses and it does not directly affect hair dyeing power" does not occur.
  • the pH and total alkalinity during mixing can be adjusted separately.
  • the inventors of the present invention have found that, firstly, the oxidative polymerization reaction (hair dyeing effect) of melanin precursors is not pH dependent, but is essentially dependent on the total alkali at the time of mixing each agent. It was found that this depended on the concentration (amount of free [OH ⁇ ] derived from alkali).
  • the inventor of the present application found that if the total alkalinity at the time of mixing each agent is adjusted to 3.0 ml/g or less, the oxidative polymerization reaction of the melanin precursor is effectively delayed, and the melanin precursor is transferred to the hair. We found out what happens after the penetration of each agent.
  • the above hair dyeing effect of the air oxidation type hair dye of the present invention is similar to that of the air oxidation type hair dye of Patent Document 1, which is a one-part formula, and the first part (acidic agent), which is a two-part formula.
  • the air oxidation type hair dye of Patent Document 2 in which "two coats" are applied without mixing a second agent (an alkaline agent), is not disclosed or suggested.
  • the pH within the range of 8 to 11 at the time of mixing each agent is not a determining factor for the above-mentioned hair dyeing power effect of the present invention, but it further improves the hair dyeing power and dyes. This is an effective condition for suppressing hair damage after hair removal.
  • any one or more of the air oxidation hair dyes according to the first invention contains a polymer having a cationic group (for example, a cationic polymer or an amphoteric polymer) as component (C). Therefore, the hair dyeing power of the hair dye can be further improved.
  • the polymer having a cationic group has an anionic property to be adsorbed to the hair surface, which in turn makes it difficult for melanin precursors and melanin to fall off from the hair.
  • amino-modified silicone has not been confirmed to have such an effect on improving hair dyeing power.
  • Preferred examples of the melanin precursor include the four types of melanin precursors defined in the fourth invention and salts thereof.
  • one or more selected from 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and salts thereof may be more preferable.
  • the alkali compound as component (B) contains carbonate and/or bicarbonate.
  • Carbonates such as Na carbonate have the effect of increasing the total alkalinity and pH of the reaction system
  • bicarbonates such as Na bicarbonate have the effect of increasing the total alkalinity of the reaction system and lowering the pH. Therefore, the combined use of carbonate and/or bicarbonate and, for example, ammonia is convenient for adjusting the pH and total alkalinity when mixing each agent, and as a result, the effect of suppressing ammonia odor can also be obtained.
  • the air oxidation type hair dye of the present invention uses a precursor of melanin, which is a hair pigment, and polymerizes and develops color through air oxidation.
  • This hair dye contains at least an acidic agent containing a melanin precursor as the component (A) and a reducing agent as the component (D), and an alkaline agent containing an alkaline compound as the component (B). It is configured as a multi-drug formula or more.
  • Any one or more of the agents constituting the hair dye contains a direct dye, which is component (E). At least the acidic agent, the alkaline agent, and the agent containing component (E) are applied to the hair after mixing, or sequentially applied to the hair without mixing, in a "simultaneous application" method.
  • Hair dye is usually a two-part formula, but for example, a third part of an appropriate composition that does not contain any of the components (A), (B), (D), and (E) may be added as an optional component.
  • a multi-drug formula such as a three-drug formula may also be used.
  • the mixing ratio of the alkaline agent and the acidic agent in the two-component hair dye is set appropriately, and when mixing each agent, the total alkalinity is 3.0 ml/g or less, preferably the pH is 8.
  • alkaline agent: acidic agent may be set arbitrarily within the range of 1:5 to 5:1 on the premise that the ratio is within the range of 1:1 to 11. :1.5, 1.5:1, etc. may be used.
  • each agent is not limited, but a liquid dosage form based on water is preferred.
  • a part of each agent can also be in the form of powder or granules.
  • liquid dosage forms include, but are not limited to, solubilized products (solutions), emulsified liquids, gels, creams, and the like. Particularly preferred are emulsified liquids and creams. It is also preferable to use it by discharging it in the form of a cream using an aerosol method or in the form of a foam together with a propellant.
  • the aerosol container When using an aerosol type air oxidation type hair dye, the aerosol container must be equipped with a container filled with an acidic agent and a container filled with an alkaline agent, and be capable of discharging the acidic agent and the alkaline agent at the same time. preferable.
  • the discharge mechanism of the aerosol container is the same as that described in the first embodiment section.
  • the air oxidation type hair dye of the present invention has a total alkalinity of 3.0 ml/g or less when each agent is mixed (when used).
  • the pH at the time of mixing each agent is within the range of 8 to 11, more preferably within the range of 9 to 10.
  • the pH at the time of mixing each component of the air oxidation type hair dye of the present invention is a value measured immediately after diluting the mixture of each component to 10% with water. As a measuring method, it can be measured using a pH meter such as pH-METER F-22 manufactured by HORIBA.
  • the hair dyeing performance of the air oxidation hair dye will decrease due to the pH being too low, and the solubility of the component (E) will decrease due to the pH being too high. Furthermore, precipitation of the component (E) is difficult to occur during storage of the air oxidation type hair dye or when filling the air oxidation type hair dye used in an aerosol type into an aerosol container.
  • the acidic agent has a pH of about 3 to 7, more preferably about 3 to 5, from the viewpoint of storage stability of the melanin precursor it contains.
  • the alkaline agent is preferably adjusted so that the pH of the hair dye is within the range of 8 to 11 at the time of mixing each agent.
  • the hair dye must have a total alkalinity of 3.0 ml/g or less when mixing each agent, more preferably 2.5 ml/g or less, and particularly preferably 2.0 ml/g or less. .0ml/g or less.
  • the lower limit of the total alkalinity is not limited, but it is preferably 0.4 ml/g or more, more preferably 0.8 ml/g or more, particularly preferably 1.2 ml/g or more when mixing each agent.
  • the acidic agent contains a melanin precursor as component (A) and a reducing agent as component (D).
  • the types of melanin precursors are not limited, but include 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and these One or more types selected from salts are preferable, and one or more types selected from 5,6-dihydroxyindoline, 5,6-dihydroxyindoline-2-carboxylic acid, and salts thereof are more preferable.
  • salts examples include hydrochloride, hydrobromide, phosphate, sulfate, acetate, lactate, citrate, etc. Among them, hydrochloride, hydrobromide, phosphoric acid salt, etc. Salts, sulfates or lactates are preferred.
  • component (A) is not limited, it is preferably 0.001% by mass or more, more preferably 0.01% by mass or more when mixing each agent. Further, the content of component (A) when mixing each agent is preferably 2.0% by mass or less, more preferably 1.5% by mass or less. When the content of component (A) is 0.001% by mass or more when mixing each agent, the hair dyeing power is excellent, and when the content is 2.0 mass% or less, the proportion of component (A) polymerized outside the hair is low. Therefore, it becomes easier to obtain a hair dyeing effect according to the blending amount of component (A).
  • the acidic agent contains (D) a reducing agent in order to enhance the storage stability of component (A).
  • a reducing agent ascorbic acid, sulfite, L-cysteine, thioglycolic acid, salts thereof, etc. can be used.
  • the content of the reducing agent in the acidic agent is not limited, but is preferably 0.001% by mass or more, particularly preferably 0.01% by mass or more. Further, the content of the reducing agent in the acidic agent is preferably 1% by mass or less, particularly preferably 0.5% by mass or less.
  • the acidic agent may also contain a pH adjuster to adjust the pH to about 3 to 7.
  • a pH adjuster various acids such as hydrochloric acid, orthophosphoric acid, phosphoric acid, tartaric acid, citric acid, and lactic acid can be used.
  • alkalis such as sodium hydroxide, ammonia, and alkylamines can also be used as appropriate.
  • the hair dye of the present invention does not contain oxidizing agents such as hydrogen peroxide, sodium percarbonate, potassium perborate, ammonium persulfate, sodium peroxide, hydrogen peroxide adducts of sulfates, and ammonium persulfate in acidic agents. . Even if it contains an oxidizing agent, its content is 1% by mass or less in the acidic agent, and more preferably 0.5% by mass or less.
  • the alkaline agent contains an alkaline compound which is component (B).
  • the type of alkali compound is not limited, but in addition to ammonia, carbonates such as sodium carbonate, ammonium carbonate, magnesium carbonate, and guanidine carbonate, and bicarbonates such as sodium bicarbonate (sodium bicarbonate) can be preferably used.
  • metal salts are preferable to ammonium salts because the hair dyeing power differs depending on the counter ion species, and as metal salts, sodium salts, potassium salts, calcium salts, and magnesium salts are preferable, and in particular, sodium salts, Potassium salts are preferred.
  • the content of component (B) is not limited, but from the viewpoint of ensuring polymerization of the melanin precursor, it is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, particularly preferably 0.1% by mass or more when mixing the agent. is 0.5% by mass or more.
  • the content of component (B) is preferably 2.5% by mass or less, more preferably 2.0% by mass or less, particularly preferably 2.0% by mass or less when mixing the agent. It is 1.8% by mass or less.
  • an alkali compound for example, when carbonate and/or bicarbonate are used in combination with ammonia, particularly excellent hair dyeing power, hair damage prevention effect, and ammonia odor can be obtained for the reasons described in "Effects of Appendix 3" below. A suppressive effect can be obtained.
  • Preferred embodiments of the alkaline compound include a combination of ammonia such as 28% aqueous ammonia and sodium carbonate, a combination of ammonia, sodium carbonate and sodium hydrogen carbonate (sodium bicarbonate), a combination of ammonia and ammonium hydrogen carbonate, and a combination of sodium carbonate and hydrogen carbonate.
  • An example is the combined use of sodium.
  • the content of carbonate and hydrogen carbonate is not limited, it is preferably 0.001% by mass or more, particularly preferably 0.01% by mass or more when mixing each agent.
  • the content of carbonate and hydrogen carbonate is preferably 1.5% by mass or less, more preferably 1.0% by mass or less, and particularly preferably 0.8% by mass or less.
  • alkaline compounds other than ammonia, carbonates, and hydrogen carbonates include alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, aminomethylpropanol, and isopropylamine.
  • alkaline compounds include silicates such as sodium silicate and potassium silicate.
  • alkaline compounds include various metasilicates, phosphates, basic amino acids, hydroxides, and the like.
  • the multi-component air oxidation hair dye contains a nonionic or anionic direct dye as the component (E).
  • cationic direct dyes are less preferred due to the possibility of forming an ionic complex with (A) melanin precursor indoline, they can be used.
  • nonionic nitro dyes or HC dyes include 4-nitro-o-phenylenediamine, 2-nitro-p-phenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, 3-nitro-o-phenylenediamine, Nitro p-hydroxyethylaminophenol, picramic acid, picric acid, and their salts, HC Blue No.2, HC Blue No.4, HC Blue No.5, HC Blue No.6, HC Blue No.8, HC Blue No.9, HC Blue No.10, HC Blue No.11, HC Blue No.12, HC Blue No.13, HC Blue No.14, HC Brown No.1, HC Brown No.2, HC Green No.
  • HC Orange No.1 HC Orange No.2, HC Orange No.3, HC Orange No.5, HC Red No.1, HC Red No.3, HC Red No.7, HC Red No.8 , HC Red No.9, HC Red No.10, HC Red No.11, HC Red No.13, HC Red 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.7, HC Yellow No.8, HC Yellow No.9, HC Yellow No.10, HC Yellow No.11, HC Yellow No. .12, HC Yellow No.13, HC Yellow No.14, HC Yellow No.15, etc.
  • nonionic 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, Examples include Disperse Violet 4 and Disperse Violet 15.
  • anionic acid dyes examples include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Red No. 201, Red No. 227, and Red No. 230 (1), Red No. 230 (2), Red No. 231, Red No. 232, Red No. 401, Red No. 502, Red No. 503, Red No. 504, Red No. 506, Yellow No. 4, Yellow No. 5 , Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Yellow No. 402, Yellow No. 403 (1), Yellow No. 406, Yellow No. 407, Orange No. 205, Orange No. 207, Orange No. 402, Green No. 3, Green No. 204, Green No.
  • component (E) in an acidic agent.
  • the acidic agent contains (A) the melanin precursor and (D) the reducing agent, there is a concern that the component (E) may become unstable. In this sense, it is preferable that component (E) be contained in an alkaline agent.
  • the component (E) can be preferably contained in the acidic agent.
  • the (E) components are HC Blue 15, HC Blue 16, 2-Amino-6-Chloro-4-Nitrophenol, HC Yellow 4, HC Yellow 2, HC Red 13, N, which have excellent reducing agent resistance.
  • Examples include N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, HC Blue 2, HC Blue 11, etc., especially HC Blue 15, HC Yellow 4, HC Yellow 2, HC Red 13, 3. -Nitro p-hydroxyethylaminophenol is preferred.
  • component (E) may preferably be contained in an alkaline agent.
  • component (E) is HC Red 13, HC Yellow 4, HC Yellow 2, 2-Amino-6-Chloro-4-Nitrophenol, HC Blue 15, HC Blue 16, HC, which have excellent resistance to alkali compounds.
  • Blue 2 HC Blue 11, N, N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, Red No. 106, Red No. 27, Orange No. 205, etc. are exemplified, especially HC Red 13, Preferred are HC Yellow 4, HC Yellow 2, HC Blue 16, HC Blue 2, 3-nitro p-hydroxyethylaminophenol.
  • the content of component (E) in the air oxidation hair dye may be appropriately determined and is not limited, but it is preferably 0.001% by mass or more, more preferably 0.01% by mass or more when mixing each agent. On the other hand, the content of component (E) in the air oxidation hair dye is preferably 0.5% by mass or less, more preferably 0.4% by mass or less.
  • component (E) If the content of component (E) is excessively high, precipitation of component (E) may occur during storage of the air oxidation type hair dye or when filling the aerosol container of the air oxidation type hair dye used in an aerosol type. is possible. If component (E) precipitates, there are concerns that the hair will be dyed in an unexpected color or that the internal structure of the aerosol container may become clogged. On the other hand, by blending component (E), which increases its solubility under alkaline conditions, into an alkaline agent, its precipitation can be suppressed. As such component (E), 3-nitro p-hydroxyethylaminophenol is preferred.
  • the air oxidation type hair dye further contains (F) one or more selected from methyl carbitol, ethyl carbitol, butyl carbitol, or salts thereof, and/or octanol/water partition coefficient (Log Pow).
  • An appropriate amount of a solvent can be blended with a smaller amount than water.
  • the octanol/water partition coefficient (Log Pow) is defined by the formula Log[PO]/[PW] (where [PO] indicates the number of moles of solvent in the octanol phase, and [PW] indicates the number of moles of solvent in the aqueous phase. (indicates the number of moles of solvent in the solvent) and means the distribution coefficient of sample molecules between the octanol phase and the aqueous phase.
  • solvents with an octanol/water partition coefficient (Log Pow) smaller than that of water include diethylene glycol, polyethylene glycol (PEG100, PEG200, PEG400, PEG600, PEG1000, PEG1540, etc.), glycerin, diglycerin, polyglycerin, and the like.
  • component (F) When component (F) is contained in an air oxidation hair dye, precipitation of the nonionic or anionic direct dye that is component (E) can be suppressed.
  • component (F) When component (F) is contained in the same agent as component (E), the effect of suppressing the precipitation of component (E) can be obtained from the time of storage of the air oxidation type hair dye.
  • precipitation of component (E) can be suppressed when filling an aerosol container with an air oxidation type hair dye used in an aerosol type.
  • the content of component (F) in the air oxidation hair dye is not limited, but if the content of component (F) is 0.5% by mass or more in the agent containing component (E) or when mixing each component of the air oxidation hair dye. It is preferably at least 3% by mass, more preferably at least 5% by mass. On the other hand, the content of component (F) is preferably 20% by mass or less, more preferably 17% by mass or less, in the agent containing component (E) or when mixing each agent of the air oxidation type hair dye. Particularly preferred is 15% by mass or less. When the content of component (F) is 0.5% by mass or more, precipitation of component (E) is effectively suppressed.
  • the acidic agent, alkaline agent, or other agent constituting the air oxidation type hair dye of the present invention each optionally contains a solvent, higher alcohol, surfactant, oily component, etc. other than component (F). be able to.
  • solvents other than component (F) include ethylene glycol, propylene glycol, polypropylene glycol, ethanol, n-propanol, isopropanol, methyl cellosolve, benzyl alcohol, and phenethyl alcohol.
  • the higher alcohol is the same as those exemplified in the first embodiment section.
  • the surfactant include nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants.
  • cationic surfactants are not so preferred due to concerns about the formation of ionic complexes with (A) indoline, which is a melanin precursor.
  • each surfactant is the same as those in the first embodiment section.
  • the POE-added nonionic surfactant improves the hair dyeing power of the hair dye of the present invention.
  • the number of moles of ethylene oxide added is preferably 100 or less, more preferably 50 or less.
  • the air oxidation type hair dye of the present invention contains preservatives such as sodium benzoate, organic solvents such as ethanol, sugars such as sorbitol and maltose, and water-soluble substances such as hydroxyethyl cellulose and carboxyvinyl polymer.
  • Polymers polydimethylmethylenepiperidinium chloride solution, cationized water-soluble polymers such as diallyldimethylammonium chloride/hydroxyethyl cellulose, chelating agents such as tetrasodium hydroxyethane diphosphonate solution, inorganic salts such as sodium chloride, hair growth ingredients , plant extracts, crude drug extracts, amino acids, peptides, urea, vitamins, fragrances, ultraviolet absorbers, etc. may be optionally contained.
  • the air oxidation hair dye is composed of multiple agents, and the acidic agent among them contains the melanin precursor, which is the component (A), so that the melanin precursor is not absorbed during storage before use. There is no risk of oxidative polymerization and polymerization, and the melanin precursor has high storage stability. Therefore, there is no fear that the hair dyeing power of the hair dye will decrease.
  • the acidic agent also contains the reducing agent (D)
  • the storage stability of the melanin precursor is even higher.
  • any one or more of the agents constituting the hair dye contains the direct dye as component (E)
  • the hair dye can have a wide variety of color variations.
  • the component (E) is a nonionic or anionic direct dye, it does not become unstable even though it coexists with reducing agents and alkaline compounds during storage or when mixing each agent.
  • the pH and total alkalinity during mixing can be adjusted separately.
  • the inventors of the present invention have found that, first, the oxidative polymerization reaction of melanin precursors is essentially dependent on the total alkalinity (free alkali-derived It was found that it depends on the [OH ⁇ ] amount).
  • the inventor of the present application found that if the total alkalinity at the time of mixing each agent is adjusted to 3.0 ml/g or less, the oxidative polymerization reaction of the melanin precursor is effectively delayed, and the melanin precursor is transferred to the hair. We found out what happens after the penetration of
  • the above hair dyeing effect of the air oxidation type hair dye of the present invention is similar to that of the air oxidation type hair dye of Patent Document 1, which is a one-part formula, and the first part (acidic agent), which is a two-part formula.
  • the air oxidation type hair dye of Patent Document 2 in which "two coats" are applied without mixing a second agent (an alkaline agent), is not disclosed or suggested.
  • pH is within the range of about 8 to 11 when mixing each agent, it is effective in suppressing hair damage after hair dyeing, and is preferred.
  • Preferred examples of the melanin precursor include the two types of melanin precursors specified in Appendix 2 and salts thereof.
  • the alkaline compound that is component (C) preferably contains carbonate and/or bicarbonate.
  • Carbonates such as Na carbonate have the effect of increasing the total alkalinity and pH of the reaction system
  • bicarbonates such as Na bicarbonate have the effect of increasing the alkalinity of the reaction system and lowering the pH. Therefore, the combined use of carbonate and/or bicarbonate and, for example, ammonia is convenient for adjusting the pH and total alkalinity when mixing each agent, and as a result, the effect of suppressing ammonia odor can also be obtained.
  • an air oxidation type hair dye contains component (F), it can be used during storage of the air oxidation type hair dye, or before, after or after filling an aerosol container of an air oxidation type hair dye used in an aerosol type. In some cases, precipitation of component (E) can be suppressed.
  • Examples Examples of the present invention will be described below along with corresponding comparative examples. The technical scope of the present invention is not limited by these Examples and Comparative Examples.
  • the acidic agent and alkaline agent according to each Example and each Comparative Example are mixed at a mass ratio of 1:1 at the time of use. applicable.
  • Example and Comparative Example Ten trained expert panelists visually inspected the hair dyeing condition of the hair bundle samples for evaluation in each Example and Comparative Example and determined the hair dyeing power based on the points of the following 5-level evaluation criteria. It was evaluated by During the evaluation, each panelist referred to a sample of a dyed hair bundle that specifically shows the five-level evaluation criteria. For each example and each comparative example, the average value of the evaluation scores of 10 panelists was taken, and if there was a value below the decimal point, this was rounded off to determine the evaluation score.
  • the acidic agent and alkaline agent according to each Example and each Comparative Example were mixed at a mass ratio of 1:1 immediately before evaluation, and a 30 cm long white hair coat manufactured by Beaulux Co., Ltd.
  • the above mixture having the same weight as the weight of the hair bundle was uniformly applied to the hair bundle sample using a brush. After the application, the hair bundle sample was left in a constant temperature bath at 30° C. for 10 minutes, and then washed with water. The hair bundle sample after washing with water was dried with warm air to obtain a hair bundle sample for evaluation.
  • Example and Comparative Example Ten trained expert panelists visually inspected the hair dyeing condition of the hair bundle samples for evaluation in each Example and Comparative Example and determined the hair dyeing power based on the points of the following 5-level evaluation criteria. It was evaluated by During the evaluation, each panelist referred to a sample of a dyed hair bundle that specifically shows the five-level evaluation criteria. For each example and each comparative example, the average value of the evaluation scores of 10 panelists was taken, and if there was a value below the decimal point, this was rounded off to determine the evaluation score. The evaluation results of each Example and each Comparative Example are shown in the "Hair Dyeing Power" column of Tables 4 to 7.
  • Hair dyeing power is low.
  • 1 Hair dyeing power is very low. (Evaluation of hair dyeing power stability) 30 g each of the acidic agent and alkaline agent according to each Example and each Comparative Example were filled into No. 4 standard bottles and stored in a constant temperature bath at 50° C. for 2 weeks. Then, using 1 g of each hair dye composition prepared by mixing an acidic agent and an alkaline agent in a mass ratio of 1:1 for each example after storage, The hair was subjected to hair dyeing treatment as described in . Hair bundle samples obtained through these hair dye treatments are referred to as "stability evaluation hair bundle samples.”
  • the acidic agent and the alkaline agent according to each Example and each Comparative Example which were prepared at the same time, were mixed at a mass ratio of 1:1 to form a hair dye composition, and these hair dyes were mixed.
  • 1 g of each of the agent compositions was subjected to hair dyeing treatment as described in the section "Evaluation of Hair Dyeing Power" above.
  • the hair bundle samples obtained through these hair dyeing treatments are referred to as "reference hair bundle samples.”
  • the present disclosure also includes the following aspects.
  • It is composed of an acidic agent containing the following components (A) and (D) and an alkaline agent containing the following component (B), and one or more of the agents contains the following component (E).
  • An air oxidation type hair dye which is a multi-component hair dye in which each component is simultaneously applied to the hair, and the total alkalinity of each component is 3.0 ml/g or less when mixed.
  • total alkalinity refers to the amount of acid-consuming components in the sample or It is a parameter that means the amount of free [OH - ] derived from alkali, and specifically, it is the mL unit of hydrochloric acid required when 1 g of a mixed solution of each agent as a sample is neutralized and titrated with 0.1N hydrochloric acid. say the amount of Note that a mixture of each agent may exhibit multiple neutralization points depending on the type of alkaline compound or due to the combination of two or more types of alkaline compounds.
  • multi-component hair dye includes an acidic agent containing components (A) and (D) and an alkaline agent containing component (B), and one or more of these agents
  • A) and (D) and an alkaline agent containing component (B) In addition to the two-part hair dye containing the component (E), other products containing or not containing the component (E) are mixed together with the two-part hair dye when simultaneously applied to the hair.
  • multi-component hair dyes containing one or more agents. When applied to hair, additional agents that do not need to be applied simultaneously with the above-mentioned acidic or alkaline agents may or may not be a component of the hair dye of the first invention. .
  • the melanin precursor that is the component (A) includes 5,6-dihydroxyindoline and 5,6-dihydroxyindoline other than 5,6-dihydroxyindoline-2-carboxylic acid listed in Appendix 2 below, such as 5,6-dihydroxyindole and 5,6-dihydroxyindoline-2-carboxylic acid. It includes various melanin precursors, derivatives thereof, salts thereof, etc., which retain the property of developing color through oxidative polymerization through air oxidation, such as 6-dihydroxyindole-2-carboxylic acid.
  • (F) One or more selected from methyl carbitol, ethyl carbitol, butyl carbitol, or salts thereof, and/or a solvent with an octanol/water partition coefficient (Log Pow) smaller than that of water.
  • a multi-component air oxidation hair dye that prevents polymerization of melanin precursors before use and achieves sufficient hair dyeing power by mixing and simultaneously applying each component.

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Abstract

La présente invention concerne un colorant capillaire d'oxydation par l'air de type à plusieurs agents avec lequel la polymérisation d'un précurseur de mélanine avant utilisation est empêchée, et par l'application simultanée d'agents constitutifs, un pouvoir colorant capillaire suffisant est obtenu. Ce colorant capillaire d'oxydation par l'air est un colorant capillaire d'oxydation par l'air de type à plusieurs agents qui contient un agent acide contenant un précurseur de mélanine et servant de composant (A) et un agent alcalin contenant un composé alcalin et servant de composant (B), les deux agents étant appliqués simultanément sur les cheveux, et l'alcalinité totale lorsque les deux agents sont mélangés étant de 3,0 ml/g ou moins.
PCT/JP2023/020201 2022-05-31 2023-05-31 Colorant capillaire d'oxydation par l'air WO2023234325A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008521925A (ja) * 2004-12-02 2008-06-26 ザ プロクター アンド ギャンブル カンパニー 毛髪染色組成物
US20100299847A1 (en) * 2004-09-09 2010-12-02 6569048 Canada Inc. Method and kit for modifying the coloration of keratinous fibres
JP2021532180A (ja) * 2018-07-20 2021-11-25 エイチエフシー・プレステージ・インターナショナル・ホールディング・スウィッツァーランド・エスアーエールエル アルカリキャンセル効果のある毛髪着色製品または漂白製品およびその組成物

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100299847A1 (en) * 2004-09-09 2010-12-02 6569048 Canada Inc. Method and kit for modifying the coloration of keratinous fibres
JP2008521925A (ja) * 2004-12-02 2008-06-26 ザ プロクター アンド ギャンブル カンパニー 毛髪染色組成物
JP2021532180A (ja) * 2018-07-20 2021-11-25 エイチエフシー・プレステージ・インターナショナル・ホールディング・スウィッツァーランド・エスアーエールエル アルカリキャンセル効果のある毛髪着色製品または漂白製品およびその組成物

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