JP2021004181A - Oxidative hair dye or bleach composition - Google Patents

Abstract

To provide an oxidative hair dye or bleach composition that can reduce sensory stimulation while improving brightness.SOLUTION: An oxidative hair dye or bleach composition contains an agent containing at least ammonia as an alkali agent, and an agent containing hydrogen peroxide the amount of which exceeds 2.5 mass% at the time of use. In the agent containing ammonia, (A) oxo acids with 10 or less carbon atoms and with a molecular weight of 250 or less and (B) salts generated from neutralization of acids and bases (excluding carbonates or hydrogen carbonates) are contained.SELECTED DRAWING: None

Description

The present invention relates to an oxidative hair dye or decolorizing agent composition containing an alkaline agent and hydrogen peroxide.

For example, an oxidative hair dye or decolorizing agent composition composed of a first agent containing ammonia or the like as an alkaline agent and a second agent containing hydrogen peroxide or the like as an oxidizing agent is known. The alkaline agent promotes the action of the oxidizing agent contained in the second agent, and swells the hair to improve the permeability of the dye to the hair. The oxidant decomposes the melanin pigment in the hair and, in the presence of the oxidative dye, forms an oxidative dye polymer inside the hair.

However, ammonia used as an alkaline agent and hydrogen peroxide used as an oxidizing agent improve the brightness as the amount used increases, but the brightness is high, especially equivalent to 9 levels or more specified on the JHCA hair coloring level scale. In order to obtain the brightness of hydrogen peroxide, it may irritate the scalp and the like. On the other hand, if the amount of ammonia or oxidant was simply reduced, the desired brightness could not be obtained. Conventionally, an oxidative hair dye composition that reduces skin irritation has been known. For example, the oxidative hair dye composition disclosed in Patent Document 1 contains ammonia, an ammonium salt and the like as an alkaline agent.

Japanese Unexamined Patent Publication No. 1-165514

However, when trying to obtain a high brightness, particularly a brightness equivalent to or higher than the specified 9 levels on the JHCA hair coloring level scale, it is still difficult to achieve both the action of reducing sensory stimulation.

An object of the present invention is to provide an oxidative hair dye or decolorizing agent composition capable of reducing sensory irritation while improving brightness.

The present invention is based on the finding that sensory stimuli can be reduced while improving brightness by using a predetermined oxo acid and a salt in combination.
In order to achieve the above object, one aspect of the present invention is an oxidative hair dye containing an agent containing at least ammonia as an alkaline agent and an agent containing hydrogen peroxide in an amount exceeding 2.5% by mass when used. Alternatively, in the decolorizing agent composition, (A) an oxo acid having 10 or less carbon atoms and a molecular weight of 250 or less, and (B) a salt (carbonate or carbonic acid) produced by neutralization of an acid and a base in the ammonia-containing agent. It is characterized by containing (excluding hydrogen peroxide).

In the ammonia-containing agent, the mass ratio (A / B) of the content of the component (A) to the content of the component (B) may be 0.01 to 10.
In the ammonia-containing agent, the mass ratio of the total content of the alkaline agent to the total content of the component (A) and the content of the component (B) was 2.0 to 11.5. May be good.

The component (A) is at least one selected from phosphoric acid, citric acid, and lactic acid, and the component (B) may be an ammonium salt.

According to the present invention, sensory stimulation can be reduced while improving the brightness.

Hereinafter, an embodiment embodying the oxidative hair dye or decolorizing agent composition of the present invention will be described. Specific examples of the oxidative hair dye or decolorizing agent composition include a multi-agent type composition, for example, a two-agent type oxidative hair dye or decolorizing agent composition. Hereinafter, the components of the two-agent oxidative hair dye or decolorizing agent composition will be exemplified.

<Two-agent decolorizing agent composition>
The two-agent decolorizing agent composition is composed of, for example, a first agent containing at least ammonia as an alkaline agent and a second agent containing at least hydrogen peroxide as an oxidizing agent.

(First agent of two-agent decolorizing agent composition)
The first agent of the decolorizing agent composition is ammonia as an alkaline agent, (A) an oxo acid having 10 or less carbon atoms and a molecular weight of 250 or less, and (B) a salt (carbonate or hydrogen carbonate) produced by neutralization of an acid and a base. (Excluding salt), etc. are contained.

The component (A) reduces sensory stimuli when used in combination with the component (B) described later. The oxo acid refers to a compound in which a hydroxy group (-OH) and an oxo group (= O) are bonded to a certain atom, and the hydroxy group gives an acidic proton. As the component (A), an oxo acid having 10 or less carbon atoms and a molecular weight of 250 or less is applied. By defining in such a numerical range, sensory stimulation is reduced. The component (A) may be either an organic acid or an inorganic acid, and specific examples thereof include citric acid, lactic acid, glycolic acid, malic acid, tartaric acid, oxalic acid, succinic acid, levulinic acid, maleic acid, and fumaric acid. , Carboic acids such as formic acid, acetic acid, propionic acid and capricic acid, acidic amino acids such as aspartic acid and glutamate, aromatic carboxylic acids such as benzoic acid, salicylic acid and mandelic acid, and inorganic acids such as phosphoric acid, nitrate and sulfuric acid. Can be mentioned. These may be contained alone or in combination of two or more. Among these, phosphoric acid, citric acid, and lactic acid are preferably applied from the viewpoint of being excellent in the effect of reducing sensory irritation.

The lower limit of the content of the component (A) in the first agent is appropriately set, but is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more. , Particularly preferably 0.5% by mass or more. When the content is 0.01% by mass or more, the sensory stimulation is further reduced. The upper limit of the content of the component (A) in the first agent is appropriately set, but is preferably 5% by mass or less, more preferably 2% by mass or less, and further preferably 1% by mass or less. When the content is 5% by mass or less, the sensory stimulus is further reduced and the brightness is further improved.

As the component (B), a salt (excluding carbonate or bicarbonate) produced by neutralization of an acid and a base is applied. Therefore, it does not include the salt form of oxidative dyes such as 2,4-diaminophenoxyethanol hydrochloride and the salt form of sulfite such as sulfite in which free acid cannot be isolated in water. Since carbonates or bicarbonates may cause eye irritation, the decolorizing agent composition of the present embodiment does not substantially contain carbonates or bicarbonates. In the present embodiment, "substantially free of carbonate or bicarbonate" means "not separately containing carbonate or bicarbonate", as long as the effects of the present invention are exhibited. , Even a small amount of carbonate or bicarbonate contained in each compounding ingredient is not excluded. More specifically, the lower limit of the content of carbonate or bicarbonate in the decolorizing agent composition at the time of use, that is, in the mixture of the first agent and the second agent is preferably 0.2% by mass or less. It is preferably 0.1% by mass or less, more preferably 0.05% by mass or less, and it is particularly preferable that the content is not contained. The oxidative hair dye composition described later does not substantially contain carbonate or hydrogen carbonate in the same definition. As the acid, either an inorganic acid or an organic acid can be applied, but a salt of the inorganic acid is preferable from the viewpoint of excellent effect of reducing sensory irritation. As the inorganic acid, an inorganic acid other than carbonate or hydrogen carbonate is applied, and specific examples thereof include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, boric acid, silicic acid, and metasilicic acid.

Examples of the organic acid include organic acids other than antioxidants such as aminocarboxylic acid-based chelating agent, phosphonic acid-based chelating agent, ascorbic acid salt, and erythorbic acid salt. Specifically, in the component column (A). The specific examples listed can be given.

Examples of the salt type include ammonium salt, sodium salt, potassium salt, lithium salt, calcium salt, magnesium salt and the like. Among these, ammonium salts are preferably applied from the viewpoint of being excellent in the effect of reducing sensory stimulation and the effect of improving brightness. Specific examples of the component (B) include ammonium chloride, ammonium sulfate, ammonium nitrate, ammonium phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate and the like. These may be contained alone or in combination of two or more.

The lower limit of the content of the component (B) in the first agent is appropriately set, but is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more. Is. When the content is 0.01% by mass or more, the sensory stimulus is further reduced and the brightness is further improved. The upper limit of the content of the component (B) in the first agent is appropriately set, but is preferably 5% by mass or less, more preferably 3% by mass or less, and further preferably 2% by mass or less. When the content is 5% by mass or less, the sensory stimulation is further reduced.

From the viewpoint of further reducing sensory irritation, it is preferable to specify the mass ratio (A / B) of the content of the component (A) to the content of the component (B) in the first agent within a predetermined range. The lower limit of the mass ratio (A / B) is appropriately set, but is preferably 0.01 or more, more preferably 0.05 or more, still more preferably 0.35 or more, and particularly preferably 0.5 or more. The upper limit of the mass ratio (A / B) is appropriately set, but is preferably 10 or less, more preferably 9.5 or less, and further preferably 9 or less.

Ammonia contained in the first agent works to improve the bleaching effect of hair by promoting the action of hydrogen peroxide contained in the second agent. As the first agent, an alkaline agent other than ammonia and the above-mentioned ammonium salt of the component (B) may be blended, if necessary, as long as the effects of the present invention are not impaired. Examples of the alkaline agent other than ammonia and the component (B) include alkanolamines, organic amines, basic amino acids, alkali metals, and hydroxides of alkaline earth metals. Among these, from the viewpoint of having the effect of reducing sensory stimulation, it is preferable to apply a configuration in which monoethanolamine and ammonia are used in combination. Specific examples of the alkanolamine include monoethanolamine, triethanolamine and the like. Specific examples of the organic amine include 2-amino-2-methyl-1-propanol (AMP), 2-amino-2-methyl-1,3-propanediol, guanidine and the like. Specific examples of basic amino acids include arginine, lysine and the like. Specific examples of hydroxides of alkali metals or alkaline earth metals include sodium hydroxide, potassium hydroxide and the like. These may be contained alone or in combination of two or more.

From the viewpoint of further reducing sensory irritation, the mass ratio (alkaline agent / A + B) of the total content of the alkaline agent to the total content of the component (A) and the content of the component (B) in the first agent is determined. It is preferable to specify in the range of. When an ammonium salt is used as the component (B) or the alkaline agent, the content of the alkaline agent shall be calculated as the content of ammonia generated when all the ammonium salts are dissociated in the solution.

That is, it is represented by the total content of the alkaline agent = the component that dissociates in the solution and generates ammonia (formula 1 below) + the amount of the alkaline agent other than the component that dissociates in the solution and generates ammonia.
Equation 1: (Molecular weight of ammonia (17) x molecular weight of component dissociating in solution to generate ammonia / molecular weight of component dissociating in solution to generate ammonia) of total mass ratio (alkaline agent / A + B) The lower limit is appropriately set, but is preferably 2.0 or more, more preferably 2.5 or more, and even more preferably 3.0 or more. The upper limit of the mass ratio (alkaline agent / A + B) is appropriately set, but is preferably 11.5 or less, more preferably 11.0 or less, still more preferably 10.5 or less.

The decolorizing agent composition may contain components other than those described above, such as solubilizers, water-soluble polymers, oily components, polyhydric alcohols, surfactants, preservatives, stabilizers, plant extracts, and crude drug extracts, if necessary. It may further contain substances, vitamins, fragrances, antioxidants, chelating agents, ultraviolet absorbers, moisturizers, amino acid derivatives, sugars and the like.

The solubilizer is added, for example, when the dosage form is made liquid or the like. Examples of solubilizers used include water and organic solvents (solvents). Specific examples of the organic solvent include, for example, ethanol, n-propanol, isopropanol, methyl cellosolve, ethyl cellosolve, methyl carbitol, ethyl carbitol, benzyl alcohol, phenethyl alcohol, γ-phenylpropyl alcohol, silica skin alcohol, anis alcohol, and the like. Examples thereof include p-methylbenzyl alcohol, α-dimethylphenethyl alcohol, α-phenylethanol, ethylene glycol phenyl ether (phenoxyethanol), phenoxyisopropanol, 2-benzyloxyethanol, N-alkylpyrrolidone, alkylene carbonate and alkyl ether. Of these solubilizers, only one type may be contained alone, or two or more types may be contained in combination. Of these, water is preferably applied because it has an excellent ability to dissolve other components in the first agent. When water is used as the solvent, the content of water in the mixture (content at the time of use) is preferably 40% by mass or more, more preferably 50% by mass or more.

The water-soluble polymer gives the decolorizing agent composition an appropriate viscosity. Therefore, the decolorizing agent composition may contain a water-soluble polymer within a range that does not impair the effects of the present invention. Examples of the water-soluble polymer include natural polymers, semi-synthetic polymers, synthetic polymers, and inorganic polymers. Specific examples of natural polymers include guar gum, locust bean gum, quince seed, carrageenan, galactan, arabic gum, tragacanto gum, pectin, mannan, xanthan gum, dextran, succinoglucan, curdlan, hyaluronic acid, gelatin, casein, etc. Examples thereof include albumin, collagen, dextrin, and triglucopolysaccharide (pullulan).

Specific examples of the semi-synthetic polymer include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxyethyl cellulose dimethyldiallyl ammonium chloride, hydroxypropyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, cationized cellulose, cationized guar gum, and starch phosphorus. Examples thereof include acid ester, propylene glycol alginate, and alginate.

Specific examples of the synthetic polymer include polyvinylcaprolactam, polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), vinylpyrrolidone-vinyl acetate (VP / VA) copolymer, polyvinylbutyral, polyvinylmethyl ether, carboxyvinyl polymer, and poly. Soda acrylate, polyacrylamide, polyethylene oxide, ethylene oxide / propylene oxide block copolymer, acrylate / alkyl acrylate copolymer, polydimethyldimethylenepyrrolidinium (polyquantanium-6) (Mercoat 100: manufactured by Merck) , A semi-ester of itaconic acid and polyoxyethylene (hereinafter referred to as "POE") alkyl ether, or an ester of methacrylic acid and POE alkyl ether, and at least one selected from acrylic acid, methacrylic acid and their alkyl esters. Examples thereof include a copolymer composed of a monomer and a monomer. Of these water-soluble polymers, only one type may be contained alone, or two or more types may be contained in combination.

The oily component gives the hair a moisturizing sensation. Therefore, the decolorizing agent composition may contain an oily component within a range that does not impair the effects of the present invention. Examples of the oily component include fats and oils, waxes, higher alcohols, hydrocarbons, higher fatty acids, alkylglyceryl ethers, esters, silicones and the like.

Specific examples of fats and oils include Argania spinosa kernel oil, lanolin, olive oil (olive oil), camellia oil, shea butter, almond oil, saflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, corn oil, and rapeseed oil. , Rice bran oil, rice germ oil, grape seed oil, avocado oil, macadamia nut oil, castor oil, coconut oil, evening primrose oil and the like. Specific examples of wax include beeswax, candelilla wax, carnauba wax, jojoba oil, lanolin wax and the like. Specific examples of higher alcohols include cetyl alcohol (cetanol), 2-hexyldecanol, stearyl alcohol, isostearyl alcohol, cetostearyl alcohol, oleyl alcohol, araquil alcohol, behenyl alcohol, 2-octyldodecanol, lauryl alcohol, and myristyl alcohol. , Decyltetradecanol, lanolin alcohol and the like.

Specific examples of the hydrocarbon include paraffin, olefin oligomer, polyisobutene, hydrogenated polyisobutene, mineral oil, squalane, polybutene, polyethylene, microcrystalline wax, petrolatum and the like. Specific examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, 12-hydroxystearic acid, oleic acid, lanolin fatty acid and the like. Specific examples of the alkyl glyceryl ether include batyl alcohol, kimil alcohol, ceracyl alcohol, isostearyl glyceryl ether and the like.

Specific examples of the ester include diisopropyl adipate, isopropyl myristate, cetyl octanate, isononyl isononanoate, octyldodecyl myristate, isopropyl palmitate, stearyl stearate, myristyl myristate, isotridecyl myristate, 2-ethyl palmitate. Hexil, octyldodecyl ricinolate, fatty acid cholesteryl / lanosteryl having 10 to 30 carbon atoms, cetyl lactate, lanolin acetate, ethylene glycol di-2-ethylhexanoate, pentaerythritol fatty acid ester, dipentaerythritol fatty acid ester, capric acid Examples thereof include cetyl, glyceryl tricaprylate, diisostearyl malate, dioctyl succinate, and cetyl 2-ethylhexanoate.

Specific examples of the silicone include, for example, dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, terminal hydroxyl group-modified dimethylpolysiloxane, highly polymerized silicone, polyether-modified silicone (for example,). (PEG / PPG / butylene / dimethicone) copolymer), amino-modified silicone, betaine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, mercapto-modified silicone, carboxy-modified silicone, fluorine-modified silicone and the like. Of these oily components, only one type may be contained alone, or two or more types may be contained in combination.

Examples of the polyhydric alcohol include glycol, glycerin and the like. Examples of the glycol include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, highly polymerized polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, 1,3-butylene glycol and the like. Examples of glycerin include glycerin, diglycerin, polyglycerin and the like. Of these polyhydric alcohols, only one type may be contained alone, or two or more types may be contained in combination.

The surfactant emulsifies or solubilizes the decolorizing agent composition at the time of use as an emulsifier or a component for solubilizing each component, and adjusts the viscosity or improves the viscosity stability. Therefore, the decolorizing agent composition may contain a surfactant within a range that does not impair the effects of the present invention. Examples of the surfactant include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

Specific examples of anionic surfactants include, for example, alkyl ether sulfate, alkyl sulfate, alkyl ether sulfate, alkenyl ether sulfate, alkenyl sulfate, olefin sulfonate, alkane sulfonate, saturated or unsaturated. Fatty acid salt, alkyl or alkenyl ether carboxylate, α-sulfon fatty acid salt, N-acylamino acid type surfactant, phosphate mono or diester type surfactant, sulfosuccinic acid ester, N-alkylmethyl taurine salt, their Examples include derivatives. Specific examples of the counterion of the anion group of these surfactants include sodium ion, potassium ion, triethanolamine and the like. More specifically, examples of the alkyl ether sulfate ester salt include POE sodium lauryl ether sulfate. Specific examples of the alkyl sulfate include sodium lauryl sulfate, sodium cetyl sulfate, sodium myristyl sulfate and the like. Specific examples of the alkyl sulfate derivative include POE sodium lauryl sulfate and the like. Specific examples of the phosphoric acid ester-type surfactant include POE oleyl ether phosphoric acid and the like.

Specific examples of the cationic surfactant include, for example, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, alkyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium bromide, Lanolin Ethyl Sulfate Fatty Acid Aminopropyl Ethyldimethylammonium, Stearyltrimethylammonium Saccharin, Cetyltrimethylammonium Saccharin, Methacryloyloxyethyltrimethylammonium Chloride, Behenyltrimethylammonium Methyl Sulfate, Behenyldimethylamine, Behenic Acid Diethylaminoethylamide, Behenic Acid Dimethylaminopropylamide, Examples thereof include behenic acid dimethylaminoethylamide, stearyldimethylamine, palmitoxipropyldimethylamine, stearoxypropyldimethylamine, stearic acid dimethylaminopropylamide and the like. Specific examples of alkyltrimethylammonium chloride include behenyltrimethylammonium chloride, araquiltrimethylammonium chloride and the like.

Specific examples of amphoteric surfactants include cocobetaine, lauramidopropyl betaine, cocamidopropyl betaine, sodium lauroanphoacetate, sodium cocoamphoacetate, coconut oil fatty acid amide propyl betaine, lauryl betaine (lauryldimethylaminoacetic acid betaine), and lauryl. Examples thereof include sodium aminopropionate.

Specific examples of the nonionic surfactant include an ether type nonionic surfactant, an ester type nonionic surfactant, an alkyl glucoside and the like. Specific examples of ether-type nonionic surfactants include POE cetyl ether (Cetes), POE stearyl ether (Staires), POE behenyl ether, POE oleyl ether (Ores), POE lauryl ether (Laures), and POE octyldodecyl. Examples thereof include ether, POE hexyl decyl ether, POE isostearyl ether, POE nonylphenyl ether, POE octylphenyl ether, POE polyoxypropylene (hereinafter referred to as “POP”) cetyl ether, POE / POP decyltetradecyl ether and the like.

Specific examples of the ester-type nonionic surfactant include POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monopalmitate, POE sorbitan monolaurate, POE sorbitan trioleate, and POE glycerin monostearate. POE glycerin monomyristate, POE sorbit tetraoleate, POE sorbit hexastearate, POE sorbit monolaurate, POE sorbit Mitsurou, polyethylene glycol monooleate, polyethylene glycol monostearate, polyethylene glycol monolaurate, monooleic acid prooleate Glycerin, lipophilic glycerin monostearate, self-emulsifying glycerin monostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan trioleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, sucrose fatty acid Examples thereof include esters, decaglyceryl monolaurate, decaglyceryl monostearate, decaglyceryl monooleate, and decaglyceryl monomyristate.

Specific examples of the alkyl glucoside include alkyl (8 to 16) glucoside, POE methyl glucoside, POE dioleate methyl glucoside and the like. Specific examples of alkyl (8 to 16) glucosides include capryl glucoside, caprylyl glucoside, decyl glucoside and the like. Among the specific examples of these surfactants, only one type may be contained alone, or two or more types may be contained in combination.

Specific examples of the preservative include paraben, methylparaben, sodium benzoate and the like. Specific examples of the stabilizer include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, tannic acid and the like. Specific examples of the antioxidant include ascorbic acids, sulfites and the like. Specific examples of the chelating agent include edetic acid (ethylenediaminetetraacetic acid (EDTA)), disodium edetate, tetrasodium edetate, diethylenetriaminepentaacetic acid and its salts, hydroxyethylethylenediaminetriacetic acid and its salts, and hydroxyethanedi. Phosphonic acid (HEDP) and salts thereof and the like can be mentioned. Specific examples of the moisturizer include POP diglyceryl ether and the like. Specific examples of the amino acid derivative include taurine, L-theanine and the like. Specific examples of saccharides include monosaccharides such as glucose, disaccharides such as sucrose, and honey.

The dosage form of the first agent is not particularly limited, and specific examples thereof include a liquid form such as an aqueous solution or a milky lotion, a gel form, a foam form, and a cream form at 25 ° C. Further, it may be an aerosol, a non-aerosol or the like, and in the case of a non-aerosol, various forms such as a squeeze former type and a pump former type can be further taken. In the case of aerosols, known propellants and foaming agents can be applied. Specific examples of the propellant or foaming agent include liquefied petroleum gas (LPG), dimethyl ether (DME), nitrogen gas, carbon dioxide gas and the like.

(Second agent of two-agent decolorizing agent composition)
In addition to hydrogen peroxide as an oxidizing agent, the second agent may also contain the above-mentioned solubilizer and the like. Hydrogen peroxide improves the decolorization of melanin contained in hair.

The lower limit of the content of hydrogen peroxide in the mixture is an amount exceeding 2.5% by mass, preferably an amount exceeding 3% by mass, and further preferably an amount exceeding 3.5% by mass. When such a content exceeds 2.5% by mass, the decolorizing property of melanin can be improved and the brightness can be improved. The upper limit of the content of hydrogen peroxide in the mixture is preferably 7.5% by mass or less, more preferably 5% by mass or less, and further preferably 4% by mass or less. When the content is 7.5% by mass or less, damage to hair and the like can be further suppressed.

If necessary, an oxidizing agent other than hydrogen peroxide may be added to the second agent. As the oxidizing agent other than hydrogen peroxide, only one kind may be contained alone, or two or more kinds may be contained in combination.

In order to improve the stability of hydrogen peroxide, the second agent preferably contains stabilizers such as sodium tinate, ethylene glycol phenyl ether (phenoxyethanol), hydroxyethanediphosphonic acid and salts thereof. Examples of the hydroxyethanediphosphonate include tetrasodium hydroxyethanediphosphonate and disodium hydroxyethanediphosphonate. The second agent may contain each component that is generally contained in the decolorizing agent composition and does not inhibit the action of each component described above. For example, the above-mentioned component contained in the first agent may be appropriately contained within a range that does not impair the effects of the present invention.

The dosage form of the second agent is not particularly limited, and specific examples thereof include a liquid form such as an aqueous solution or a milky lotion, a gel form, a foam form, and a cream form at 25 ° C. Further, it may be an aerosol, a non-aerosol or the like, and in the case of a non-aerosol, various forms such as a squeeze former type and a pump former type can be further taken. In the case of aerosols, known propellants and foaming agents can be applied.

The mixing ratio of the first agent and the second agent of the two-agent decolorizing agent composition is appropriately set in consideration of the concentration, miscibility, application method, etc. of each component in the mixture, but is preferably 1: 0. .2-5, more preferably 1: 0.5-2. The dosage form of the mixture is not particularly limited as long as it is a dosage form applicable to hair, and specific examples thereof include liquids such as aqueous solutions and emulsions, gels, foams, creams and the like at 25 ° C. ..

<Two-agent oxidative hair dye composition>
The two-agent hair dye composition is composed of, for example, a first agent containing at least ammonia and an oxidative dye as an alkaline agent, and a second agent containing at least hydrogen peroxide as an oxidant. Hereinafter, the differences from the above-mentioned decolorizing agent composition will be mainly described.

(Second agent of two-agent oxidative hair dye composition)
The second agent of the oxidative hair dye composition has, for example, the same composition as the second agent of the decolorizing agent composition described above.

(First agent of two-agent oxidative hair dye composition)
The first agent of the oxidative hair dye composition is ammonia as an alkaline agent, an oxidative dye, (A) an oxo acid having 10 or less carbon atoms and a molecular weight of 250 or less, and (B) a salt produced by neutralization of an acid and a base. (Excluding carbonates or bicarbonates), etc. are contained.

Oxidizing dyes are compounds that can develop color due to oxidative polymerization by hydrogen peroxide, and are classified into dye intermediates and couplers. Oxidizing dyes preferably contain dye intermediates and couplers.

Examples of the dye intermediate include p-phenylenediamine, toluene-2,5-diamine (palatorylenediamine), 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-chlor-p-phenylenediamine, 4-amino-m -Cresol, 2-amino-4-hydroxyethylaminoanisole, 2,4-diaminophenol, 1-hydroxyethyl-4,5-diaminopyrazole, salts thereof and the like can be mentioned. Specific examples of the salt include, for example, hydrochloride, sulfate and the like. Of the specific examples of these dye intermediates, only one type may be contained alone, or two or more types may be contained in combination.

The coupler develops color by combining with a dye intermediate. Examples of the coupler include resorcin, 5-amino-o-cresol, m-aminophenol, α-naphthol, 5- (2-hydroxyethylamino) -2-methylphenol, m-phenylenediamine, and 2,4-diaminophenoxyethanol. , Toluene-3,4-diamine, 2,6-diaminopyridine, diphenylamine, N, N-diethyl-m-aminophenol, phenylmethylpyrazolone, 1,5-dihydroxynaphthalene, salts thereof and the like. Specific examples of the salt include, for example, hydrochloride, sulfate and the like. Of the specific examples of these couplers, only one type may be contained alone, or two or more types may be contained in combination. Since the oxidative dye can change the color tone of the hair in various ways, it is preferable to use at least one selected from the above-mentioned specific examples of the dye intermediate and at least one selected from the above-mentioned specific examples of the coupler. It is composed. As the dye other than the oxidation dye, the first agent may appropriately contain, for example, an oxidation dye listed in "Quasi-drug Raw Material Standards" (issued in June 2006, Yakuji Nippo Co., Ltd.).

The lower limit of the content of the oxidation dye in the mixture is appropriately set, but is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and further preferably 0.1% by mass or more. When the content of the oxidative dye is 0.01% by mass or more, the color can be further improved.

The upper limit of the content of the oxidation dye in the mixture is appropriately set, but is preferably 2% by mass or less, more preferably 1.5% by mass or less, still more preferably 1% by mass or less. When the content of the oxidation dye is 2% by mass or less, the brightness is further improved. Further, especially when a solubilizer is used, the solubility in the solubilizer can be improved.

Further, the first agent may further contain a component other than the above-mentioned components, for example, a component contained in the first and second agents of the above-mentioned decolorizing agent composition, if necessary.
According to the oxidative hair dye or decolorizing agent composition of the present embodiment, the following effects can be obtained.

(1) In the present embodiment, in the first agent containing ammonia, (A) an oxo acid having 10 or less carbon atoms and a molecular weight of 250 or less, and (B) a salt (carbonate) produced by neutralization of an acid and a base. Or (excluding bicarbonate) was blended. Therefore, the sensory stimulus can be reduced while improving the brightness. In particular, even when trying to obtain a high brightness equivalent to or higher than the specified 9 levels on the JHCA hair coloring level scale, sensory stimulation can be reduced.

The above embodiment may be changed as follows.
-In the above embodiment, the numerical value of mass% indicating the content of the component shall indicate the numerical value in the dosage form including the solubilizer such as water.

-In the above-mentioned oxidative hair dye composition, as a dye other than the above-mentioned oxidative dye, for example, "Quasi-drug raw material standard" (published in June 2006, Yakuji Nippo Co., Ltd.) within a range that does not impair the effect of the present invention. The direct dyes listed in may be appropriately contained. Examples of direct dyes that may be additionally used for adjusting the hair dye color include various acid dyes, basic dyes, nitro dyes, natural dyes, disperse dyes, and HC dyes.

-In the above embodiment, it is configured as a multi-agent hair dye or decolorizing agent composition of a first agent containing an alkaline agent or the like and a second agent containing an oxidizing agent or the like.
However, the oxidative hair dye or decolorizing agent composition is not limited to the two-agent type, and a part of each component contained in the first agent and the second agent is composed as a separate agent, and is composed of three or more agent types. You may. For example, the first agent of the two-agent type is divided into two, for example, an agent containing a water-soluble polymer as other components and an agent having a composition other than the water-soluble polymer, and a three-agent type oxidative hair dye or decolorizing agent. It may be configured as a composition.

Even when the oxidative hair dye or decolorizing agent composition adopts the composition of three or more agents, it is still included in the present invention as long as the effects of the present invention are exhibited.
The viscosity of the mixture is appropriately set, but is preferably 1 to 1000 mPa · s, more preferably 1 to 750 mPa · s, and even more preferably 1 to 350 mPa · s. Generally, when the viscosity of the mixture is lowered, the sensory stimulus tends to increase, but the configuration of the present embodiment can reduce the sensory stimulus even when the viscosity of the mixture is 1000 mPa · s or less. The viscosity was measured using a B-type viscometer (TV-10 type manufactured by Toki Sangyo Co., Ltd.). The measurement conditions were 25 ° C. for 1 minute, and the measurement was performed with the No. 2 rotor at a rotation speed of 30 rpm.

Next, the embodiment will be described in more detail with reference to Examples and Comparative Examples. The present invention is not limited to the configuration described in the Example column.
<Test Example 1>
The first agent, the second agent, and the third agent of the oxidative hair dye composition containing each component shown in Tables 1 to 5 were prepared. The numerical value in the column indicating each component in each table indicates the content of the component in the column, and the unit thereof is mass%. The notations "(A)" and "(B)" in the table indicate compounds corresponding to the respective components (A) and (B) described in the claims of the present application. On the other hand, the notation "(a)" in the table indicates a contrasting compound of the component (A) described in the claims of the present application. The number in parentheses of the compound name POE or POP indicates the number of moles of ethylene oxide or propylene oxide added.

For the oxidative hair dye compositions other than Comparative Example 9, the first agent and the second agent are put into a predetermined closed container at a mass ratio of 1: 2, and the closed container is shaken up and down 30 times with a swing width of 30 cm for mixing. Then, a foamy oxidative hair dye composition was prepared. The oxidative hair dye composition of Comparative Example 9 is the same method as in Example 1 except that the first agent, the second agent, and the third agent are put into a closed container at a mass ratio of 1: 2: 0.1. To prepare a foamy oxidative hair dye composition. As the predetermined container, a container having the following shape was used in this embodiment. The bottomed tubular container body (the inner diameter of the opening is 8.5 cm, the inner diameter of the bottom is 7 cm, and the height is 14 cm) having a shape in which the opening is wider than the bottom, and the opening of the container body are liquid-tight. A container with a hemispherical lid that occludes was used. The volume of the container body is 600 mL, and the volume of the entire container with the opening closed by the lid is 770 mL. In addition, the container used was transparent so that the inside of the container could be visually recognized from the outside of the container. The shape of this container is the same as the container disclosed in FIGS. 1 and 2 of International Publication No. 2011/151880.

The obtained oxidative hair dye composition was applied to a black hair bundle (manufactured by 10 cm Bulux) (hereinafter, simply referred to as a hair bundle) at a ratio of 2 g of the oxidative hair dye composition to 1 g of the hair bundle. It was applied using a brush and left at 30 ° C. for 40 minutes. Next, after rinsing the oxidative hair dye composition adhering to the hair bundle with water, shampoo (a bigen treatment shampoo manufactured by Hoyu Co., Ltd. as a shampoo composition) is applied to the hair bundle twice, and rinse (rinse composition). As a result, Hoyu's Bigen Treatment Rinse) was applied once. The shampoo composition and the rinse composition are each rinsed with water after each treatment. Subsequently, the hair bundle was dried with warm air and then left for one day. The lightness of the dyed hair bundle was evaluated by the method shown below. In addition, the sensory stimulation of the oxidative hair dye composition in which the first agent and the second agent were mixed was evaluated.

(Sensory stimulation)
0.2 g of an oxidative hair dye composition in which the first agent and the second agent are mixed at a ratio of 1: 2 is applied to the upper arms of 10 panelists, and the irritation felt during 20 minutes is evaluated according to the following criteria. Judgment was made regarding sensory stimulation. No irritation-Slightly felt (5 points), Slightly felt (4 points), Weakly felt (3 points), Slightly strong (2 points), and Strongly felt (1 point). Calculate the average value of the scoring results, and if the average value is 4.6 points or more, it is "excellent: 5", if it is 3.6 points or more and less than 4.6 points, it is "good: 4", 2.6 points or more and 3.6 points. Less than is "OK: 3", 1.6 points or more and less than 2.6 points is "Slightly defective: 2", and less than 1.6 points is "Defective: 1".

(Brightness of hair)
The lightness of the hair bundles after the hair dyeing treatment of each of the above examples was visually evaluated by 10 panelists under a standard light source according to the following criteria, and it was judged whether or not the lightness was excellent. On the JHCA Hair Coloring Level Scale, grades are given in 4 stages: 9th level equivalent (4 points), 8th level equivalent (3 points), 7th level equivalent (2 points), and 6th level equivalent or less (1 point). Calculate the average value of the paneler's scoring results, and if the average value is 3.6 points or more, it is "excellent: 4", if it is 2.6 points or more and less than 3.6 points, it is "good: 3", and 1.6 points or more. A score of less than 6 was rated as "slightly defective: 2", and a score of less than 1.6 was rated as "defective: 1".

As shown in Tables 1 and 2, it was confirmed that each example gave good or better results for each evaluation item.

As shown in Table 3, it was confirmed that Comparative Example 1 containing no component (A) and component (B) was inferior in the evaluation of sensory stimulus to each example. It was confirmed that Comparative Example 2 in which the component (B) was not contained and the ammonia content was increased as compared with Example 1 was particularly inferior in the evaluation of sensory stimulus to each Example. It was confirmed that Comparative Example 3 containing no component (B) was particularly inferior in the evaluation of brightness to each Example. It was confirmed that Comparative Example 4 containing no component (A) was inferior in the evaluation of sensory stimulus to each Example. It was confirmed that Comparative Example 5, which contained lauric acid instead of the component (A), was particularly inferior in the evaluation of sensory stimulation to each example. It was confirmed that Comparative Example 6 containing ascorbic acid instead of the component (A) was inferior in the evaluation of sensory stimulation and lightness to each example. It was confirmed that Comparative Example 7 containing no ammonia was inferior in the evaluation of lightness to each Example. It was confirmed that Comparative Example 8 containing the component (A) in the second agent was inferior in the evaluation of sensory stimulation and lightness to each Example. It was confirmed that Comparative Example 9 in which the component (A) and the component (B) were blended in the third agent was inferior in the evaluation of sensory stimulation and lightness to each example.

<Test Example 2>
As the oxidative hair dye composition, a first agent and a second agent containing each component shown in Table 6 were prepared.

In the composition of Example 1 as the oxidative hair dye composition, Comparative Example 10 was prepared in which the component (A) and the component (B) were not blended and the pH was substantially the same as that of Example 1. Further, Comparative Example 11 was prepared in which ascorbic acid was blended in place of the component (A) and the pH was the same as in Example 1. As for the pH, the pH at 25 ° C. when the mixture was diluted 10-fold with water and dissolved at a concentration of 10% by mass was measured. Then, the hair dyeing treatment was performed by the same test method as in Test Example 1. The lightness of each hair bundle that had been dyed was evaluated in the same manner as in Test Example 1. Moreover, the sensory stimulus was evaluated by the same method as in Test Example 1.

As shown in Table 6, ascorbic acid was blended in place of Comparative Example 10 or (A), which does not contain the component (A) and the component (B) and has a pH substantially similar to that of Example 1, and carried out. It was confirmed that Comparative Example 11, which had substantially the same pH as Example 1, was inferior in the evaluation of sensory stimulation to Example 1. It was confirmed that Example 1 was superior in sensory stimulation even though the content of the alkaline agent was higher than that of Comparative Example 10.

It was confirmed that the reduction of sensory stimuli in the present invention is not due to the reduction of pH but is brought about independently of pH. That is, it was confirmed that it is necessary to use the component (A) and the component (B) in combination in order to reduce the sensory stimulus while improving the brightness.

In addition, in the examples using the component (B), eye irritation was reduced (data not attached).

Claims (4)

In an oxidative hair dye or decolorizing agent composition containing an agent containing at least ammonia as an alkaline agent and an agent containing hydrogen peroxide in an amount exceeding 2.5% by mass when used.
The ammonia-containing agent contains (A) an oxo acid having 10 or less carbon atoms and a molecular weight of 250 or less, and (B) a salt (excluding carbonate or bicarbonate) produced by neutralization of an acid and a base. An oxidative hair dye or decolorizing agent composition. The oxidation according to claim 1, wherein the mass ratio (A / B) of the content of the component (A) to the content of the component (B) in the agent containing ammonia is 0.01 to 10. Hair dye or decolorizing agent composition. Claimed that the mass ratio of the total content of the alkaline agent to the total content of the component (A) and the content of the component (B) in the ammonia-containing agent is 2.0 to 11.5. Item 2. The oxidative hair dye or decolorizing agent composition according to Item 1 or 2. The oxidative hair dyeing according to any one of claims 1 to 3, wherein the component (A) is at least one selected from phosphoric acid, citric acid, and lactic acid, and the component (B) is an ammonium salt. Agent or decolorizing agent composition.