Hair bleaching and destaining composition

Abstract

To provide a hair-bleaching / dye-removing composition containing a powdery persulfate-containing composition and capable of improving bleaching power while suppressing an increase in volume.SOLUTION: The hair bleaching / dye removing composition comprises an oxidizing agent-containing composition and a persulfate-containing composition, wherein the persulfate-containing composition contains two or more kinds of (A) powdery alkaline agents, and the total content of the (A) powdery alkaline agents is ≥ 25 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a hair bleaching / decolorizing composition comprising an oxidizing agent-containing composition and a persulfate-containing composition. [Background technology]

[0002] Generally, hair bleaching / decoloring compositions that are effective when multiple agents are mixed together are known. For example, a known hair bleaching / decoloring composition is a hair bleaching / decoloring composition that is composed of a powdered persulfate-containing composition containing a persulfate and an oxidizing agent containing, for example, hydrogen peroxide.

[0003] Hair bleaching and decoloring compositions containing dispersants to prevent powder scattering, improve dispersibility, etc. have been known for some time. For example, Patent Document 1 discloses a powdered persulfate-containing composition that contains a metal stearate or the like as a dispersant. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-246371 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional powdered persulfate-containing compositions have not addressed the issue of bulkiness, and as a result, no powdered persulfate-containing hair bleaching / decoloring composition has been obtained that has improved bleaching power while suppressing an increase in bulk. [Means for solving the problem]

[0006] The present invention is based on the discovery that a composition containing a persulfate salt, in which two or more types of (A) powdery alkaline agents are blended in predetermined amounts, or in which the blending amount of a component having a bulk density of 0.5 g / mL or less is specified to be equal to or less than a predetermined amount, can improve bleaching power while suppressing an increase in bulk.

[0007] Various aspects for solving the above problems will be described. The hair bleaching / decoloring composition of aspect 1 is a hair bleaching / decoloring composition comprising an oxidizing agent-containing composition and a persulfate-containing composition, wherein the persulfate-containing composition comprises two or more types of (A) powdered alkaline agents, and the total content of the (A) powdered alkaline agents is 25 mass% or more.

[0008] The hair bleaching / decoloring composition of aspect 2 is a hair bleaching / decoloring composition comprising an oxidizing agent-containing composition and a persulfate-containing composition, wherein the persulfate-containing composition contains (A) a powdered alkaline agent and the total content of components with a bulk density of 0.5 g / mL or less is 5.5 mass% or less.

[0009] Aspect 3 is the hair bleaching / decoloring composition according to Aspect 1 or 2, wherein the powdery alkaline agent (A) contains an (A1) silicate and an (A2) metasilicate, and the mass ratio (A2 / A1) of the content of the (A1) silicate to the content of the (A2) metasilicate is 0.1 or more and 2 or less.

[0010] Aspect 4 is a hair bleaching / decoloring composition according to any one of Aspects 1 to 3, wherein the powdery alkaline agent (A) contains silicate (A1), and the content of silicate (A1) in the persulfate-containing composition is 10% by mass or more.

[0011] A fifth aspect is the hair bleaching / decoloring composition according to any one of the first to fourth aspects, wherein the bulk density of the persulfate-containing composition is 0.7 g / mL or more. The hair bleaching / decoloring composition of aspect 6 is a hair bleaching / decoloring composition comprising an oxidizing agent-containing composition and a persulfate-containing composition, wherein the persulfate-containing composition comprises two or more types of (A) powdered alkaline agents, the total content of the (A) powdered alkaline agents being 25% by mass or more, the (A) powdered alkaline agents comprising (A1) silicate, the content of the (A1) silicate in the persulfate-containing composition being 10% by mass or more, and the total content of components with a bulk density of 0.5 g / mL or less in the persulfate-containing composition being 5.5% by mass or less. [Effects of the Invention]

[0012] According to the present invention, in a hair bleaching / decoloring composition containing a powdered persulfate-containing composition, the bleaching power can be improved while suppressing an increase in bulk. DETAILED DESCRIPTION OF THE INVENTION

[0013] (First embodiment) A first hair bleaching / dyeing composition will be described below as a first embodiment of the hair bleaching / dyeing composition of the present invention. The first hair bleaching / dyeing composition may be configured as a multi-component composition, such as a two-component hair bleaching / dyeing composition or a three-component hair bleaching / dyeing composition. The configuration of a three-component first hair bleaching / dyeing composition will be exemplified below.

[0014] (The first three-component hair bleaching and dye removal composition) The three-part first hair bleaching / decoloring composition comprises, for example, a first part as a persulfate-containing composition containing persulfate, etc., a second part as an oxidizing agent-containing composition containing an oxidizing agent, etc., and a third part as an alkaline agent-containing composition containing an alkaline agent, etc. Note that even if an alkaline agent is blended into the persulfate-containing composition, the composition containing the persulfate is still considered to be a persulfate-containing composition.

[0015] (Third agent) The third agent contains an alkaline agent and the like as described above. The alkaline agent promotes the action of the oxidizing agent contained in the second agent described below, thereby improving the hair bleaching effect. Examples of alkaline agents include ammonia, alkanolamines, silicates, carbonates, bicarbonates, carbamates, metasilicates, phosphates, organic amines, and basic amino acids. Specific examples of alkanolamines include monoethanolamine and triethanolamine. Specific examples of silicates include sodium silicate, potassium silicate, and calcium silicate. Specific examples of carbonates include sodium carbonate and ammonium carbonate. Specific examples of bicarbonates include sodium bicarbonate and ammonium bicarbonate. Specific examples of carbamates include ammonium carbamate. Specific examples of metasilicates include sodium metasilicate and potassium metasilicate. Specific examples of phosphates include triammonium phosphate and diammonium hydrogen phosphate. Specific examples of organic amines include 2-amino-2-methyl-1-propanol (AMP), 2-amino-2-methyl-1,3-propanediol, and guanidine. Specific examples of basic amino acids include arginine and lysine. Of these alkaline agents, only one may be contained alone, or two or more may be contained in combination.

[0016] Among these, it is preferable to contain at least one selected from ammonia and ammonium salts from the viewpoint of improving the bleaching power. When the first hair bleaching / decoloring composition is applied to hair, i.e., the mixture of the first to third agents, the content of the alkaline agent is preferably in an amount that results in a pH in the range of 7 to 12, and more preferably in an amount that results in a pH in the range of 9 to 12, when the first hair bleaching / decoloring composition is used in a typical bleaching treatment. By adjusting the pH of the mixture to 7 or higher, the action of the oxidizing agent contained in the second agent can be promoted. By adjusting the pH of the mixture to 12 or lower, damage to hair caused by application of the mixture can be suppressed. The pH of the mixture is measured at 25°C when the mixture of each agent is diluted 10 times with water and dissolved at a concentration of 10% by mass.

[0017] If necessary, the third agent may further contain other ingredients other than those mentioned above, such as solubilizers, water-soluble polymers, oily ingredients, polyhydric alcohols, surfactants, pH adjusters, sugars, preservatives, stabilizers, plant extracts, herbal extracts, vitamins, fragrances, antioxidants, chelating agents, and UV absorbers.

[0018] The solubilizer is added, for example, to make the dosage form liquid. Examples of the solubilizer used include water and organic solvents (solvents). Specific examples of organic solvents include ethanol, n-propanol, isopropanol, methyl cellosolve, ethyl cellosolve, methyl carbitol, ethyl carbitol, benzyl alcohol, phenethyl alcohol, γ-phenylpropyl alcohol, cinnamic alcohol, anise alcohol, 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 specific examples of solubilizers, only one may be contained alone, or two or more may be contained in combination. Among these, water is preferred because of its excellent ability to dissolve other components in the third agent. When water is used as the solvent, the water content (content at the time of use) is preferably 40% by mass or more, more preferably 50% by mass or more.

[0019] The water-soluble polymer compound provides an appropriate viscosity to the mixture. Therefore, the third agent may contain a water-soluble polymer compound within a range that does not impair the effects of the present invention. Examples of water-soluble polymer compounds include natural polymers, semi-synthetic polymers, synthetic polymers, and inorganic polymers.

[0020] Specific examples of natural water-soluble polymer compounds include guar gum, locust bean gum, quince seed, carrageenan, galactan, gum arabic, tragacanth gum, pectin, mannan, xanthan gum, dextran, succinoglucan, curdlan, hyaluronic acid, gelatin, casein, albumin, collagen, and dextrin.

[0021] Specific examples of semi-synthetic water-soluble polymer compounds include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxyethyl cellulose dimethyl diallyl ammonium chloride, hydroxypropyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, cationized cellulose, cationized guar gum, starch phosphate ester, propylene glycol alginate, and alginates.

[0022] Specific examples of synthetic water-soluble polymer compounds include polyvinyl caprolactam, polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), vinyl pyrrolidone-vinyl acetate (VP / VA) copolymer, polyvinyl butyral, polyvinyl methyl ether, carboxyvinyl polymer, poly(sodium acrylate), polyacrylamide, polyethylene oxide, ethylene oxide-propylene oxide block copolymer, acrylic acid / alkyl acrylate copolymer, polydimethylmethylene piperidinium chloride, polyethylene glycol, highly polymerized polyethylene glycol, etc. Specific examples of synthetic polymers include copolymers consisting of a half ester of itaconic acid and a polyoxyethylene (POE) alkyl ether, or an ester of methacrylic acid and a POE alkyl ether, and at least one monomer selected from acrylic acid, methacrylic acid, and their alkyl esters.

[0023] Specific examples of inorganic polymers include bentonite, aluminum magnesium silicate, laponite, hectorite, and silicic anhydride. Of these water-soluble polymer compounds, only one may be contained alone, or two or more may be contained in combination.

[0024] Examples of oily components include fats and oils, waxes, hydrocarbons, higher fatty acids, alkyl glyceryl ethers, esters, and silicones. Specific examples of fats and oils include argania spinosa kernel oil, lanolin, olive oil, camellia oil, shea butter, almond oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, corn oil, rapeseed oil, rice bran oil, rice germ oil, grape seed oil, avocado oil, macadamia nut oil, castor oil, coconut oil, evening primrose oil, etc. Specific examples of waxes include beeswax, candelilla wax, carnauba wax, jojoba oil, lanolin wax, etc.

[0025] Specific examples of hydrocarbons include paraffin, olefin oligomer, polyisobutene, hydrogenated polyisobutene, mineral oil, squalane, polybutene, polyethylene, microcrystalline wax, and petrolatum. Specific examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, 12-hydroxystearic acid, oleic acid, and lanolin fatty acid. Specific examples of alkyl glyceryl ethers include batyl alcohol, chimyl alcohol, selachyl alcohol, and isostearyl glyceryl ether.

[0026] Specific examples of esters include diisopropyl adipate, isopropyl myristate, cetyl octanoate, isononyl isononanoate, octyldodecyl myristate, isopropyl palmitate, stearyl stearate, myristyl myristate, isotridecyl myristate, 2-ethylhexyl palmitate, octyldodecyl ricinoleate, cholesteryl / lanosteryl fatty acids having 10 to 30 carbon atoms, cetyl lactate, lanolin acetate, ethylene glycol di-2-ethylhexanoate, pentaerythritol fatty acid esters, dipentaerythritol fatty acid esters, cetyl caprate, glyceryl tricaprylate, diisostearyl malate, dioctyl succinate, and cetyl 2-ethylhexanoate.

[0027] Specific examples of silicones include 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, etc. Of these specific examples of oily components, only one may be contained alone, or two or more may be contained in combination.

[0028] Examples of polyhydric alcohols include glycol and glycerin. Specific examples of glycols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, highly polymerized polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, and 1,3-butylene glycol. Specific examples of glycerin include glycerin, diglycerin, and polyglycerin. Of these specific examples of polyhydric alcohols, only one may be contained alone, or two or more may be contained in combination.

[0029] Surfactants act as emulsifiers or components for solubilizing the various components of the hair bleaching / decoloring composition during use, emulsifying or solubilizing the composition, adjusting viscosity, and improving viscosity stability. Therefore, the third agent may contain a surfactant within a range that does not impair the effects of the present invention. Examples of surfactants include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

[0030] Specific examples of anionic surfactants include alkyl ether sulfates, alkyl sulfates, alkyl ether sulfate ester salts, alkenyl ether sulfates, alkenyl sulfates, olefin sulfonates, alkanesulfonates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylate salts, α-sulfonic acid salts, N-acylamino acid surfactants, mono- or diester phosphate surfactants, sulfosuccinate esters, and derivatives thereof. Specific examples of counter ions of the anionic groups of these surfactants include sodium ions, potassium ions, triethanolamine, and the like. More specifically, examples of alkyl ether sulfate ester salts include sodium POE lauryl ether sulfate. Specific examples of alkyl sulfate salts include sodium lauryl sulfate and sodium cetyl sulfate. Specific examples of alkyl sulfate derivatives include sodium POE lauryl sulfate. Specific examples of sulfosuccinate esters include disodium lauryl sulfosuccinate.

[0031] Specific examples of cationic surfactants include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, alkyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium bromide, lanolin fatty acid aminopropylethyldimethylammonium ethyl sulfate, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, methacryloyloxyethyltrimethylammonium chloride, and behenyltrimethylammonium methylsulfate.

[0032] Specific examples of amphoteric surfactants include cocobetaine, lauramidopropyl betaine, cocamidopropyl betaine, sodium lauroamphoacetate, sodium cocoamphoacetate, coconut oil fatty acid amidopropyl betaine, and lauryl betaine (lauryl dimethylaminoacetic acid betaine).

[0033] Specific examples of nonionic surfactants include ether-type nonionic surfactants, ester-type nonionic surfactants, alkyl glucosides, etc. Specific examples of ether-type nonionic surfactants include POE cetyl ether (ceteth), POE stearyl ether (steareth), POE behenyl ether, POE oleyl ether (oleth), POE lauryl ether (laureth), POE octyldodecyl ether, POE hexyldecyl ether, POE isostearyl ether, POE nonylphenyl ether, POE octylphenyl ether, etc.

[0034] Specific examples of the ester-type nonionic surfactant include POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monopalmitate, POE sorbitan monolaurate, POE sorbitan trioleate, POE glycerin monostearate, POE glycerin monomyristate, POE sorbit tetraoleate, POE sorbit hexastearate, POE sorbit monolaurate, POE sorbit beeswax, polyethylene glycol monooleate, polyethylene monostearate Examples of such glyceryl monostearate include polyethylene glycol, polyethylene glycol monolaurate, lipophilic glyceryl monooleate, lipophilic glyceryl monostearate, self-emulsifying glyceryl monostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan trioleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, sucrose fatty acid esters, decaglyceryl monolaurate, decaglyceryl monostearate, decaglyceryl monooleate, and decaglyceryl monomyristate.

[0035] Specific examples of alkyl glucosides include alkyl (having 8 to 16 carbon atoms) glucoside, POE methyl glucoside, POE dioleate methyl glucoside, etc. Of these specific examples of surfactants, only one may be contained alone, or two or more may be contained in combination.

[0036] A pH adjuster may be added to adjust the pH of the mixture. Examples of pH adjusters include inorganic acids, organic acids, and their salts. Specific examples of inorganic acids include phosphoric acid, hydrochloric acid, nitric acid, sulfuric acid, and boric acid. Specific examples of phosphoric acid include orthophosphoric acid, polyphosphoric acid, pyrophosphoric acid, and metaphosphoric acid. Specific examples of organic acids include citric acid, tartaric acid, lactic acid, malic acid, succinic acid, fumaric acid, maleic acid, gluconic acid, glucuronic acid, and benzoic acid. Specific examples of salts include sodium salts, potassium salts, and ammonium salts. Specific examples of sugars include monosaccharides such as glucose and galactose, disaccharides such as maltose, sucrose, fructose, and trehalose, and sugar alcohols. Specific examples of preservatives include parabens, methylparaben, and sodium benzoate. Specific examples of stabilizers include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, and tannic acid. Specific examples of antioxidants include ascorbic acids and sulfites. Specific examples of chelating agents include edetic acid (ethylenediaminetetraacetic acid (EDTA)), disodium edetate, tetrasodium edetate, diethylenetriaminepentaacetic acid and its salts, ethylenediaminehydroxyethyltriacetic acid and its salts, and hydroxyethanediphosphonic acid (HEDP) and its salts.

[0037] (Dosage form) The dosage form of the third agent is not particularly limited, and specific examples include liquid, gel, foam, cream, solid, etc. Examples of liquid forms include aqueous solutions, dispersions, emulsions, etc. The third agent may also be stored separately as a solid component and a liquid component, which are mixed immediately before use.

[0038] (Second agent) The second agent contains an oxidizing agent and, if necessary, the other components described above. (oxidizing agent) The oxidizing agent improves the bleaching property of melanin contained in hair. Specific examples of the oxidizing agent include hydrogen peroxide, urea peroxide, melamine peroxide, sodium percarbonate, sodium perborate, potassium perborate, ammonium persulfate, potassium persulfate, sodium persulfate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, hydrogen peroxide adducts of sulfates, hydrogen peroxide adducts of phosphates, and hydrogen peroxide adducts of pyrophosphates. Only one of these oxidizing agents may be contained alone, or two or more may be contained in combination.

[0039] The lower limit of the oxidizing agent content in the second agent is set as appropriate, but is preferably 0.1% by mass or more, more preferably 1.0% by mass or more, and even more preferably 1.5% by mass or more. When the oxidizing agent content is 0.1% by mass or more, melanin bleaching properties can be further improved. Furthermore, the upper limit of the oxidizing agent content in the second agent is set as appropriate, but is preferably 15.0% by mass or less, more preferably 12.0% by mass or less, and even more preferably 9.0% by mass or less. When the oxidizing agent content is 15.0% by mass or less, hair damage, etc. can be suppressed. Ranges that combine the above upper and lower limits are also contemplated.

[0040] When hydrogen peroxide is blended as an oxidizing agent in the second agent, in order to improve the stability of the hydrogen peroxide, the second agent preferably contains a stabilizer such as sodium stannate, ethylene glycol phenyl ether (phenoxyethanol), hydroxyethanediphosphonic acid, or a salt thereof, etc. Specific examples of hydroxyethanediphosphonates include tetrasodium hydroxyethanediphosphonate and disodium hydroxyethanediphosphonate.

[0041] (Dosage form) The dosage form of the second agent is not particularly limited, and specific examples include liquid, gel, foam, cream, solid, etc. Examples of liquid forms include aqueous solutions, dispersions, emulsions, etc.

[0042] (First agent) The first agent contains (A) two or more powdered alkaline agents and a persulfate. The first agent may contain other components such as an excipient and a dispersant as necessary.

[0043] ((A) Powdered alkaline agent) The alkaline agent contained in the first agent accelerates the action of the oxidizing agent contained in the oxidizing agent-containing composition, thereby improving the hair bleaching and / or decoloring effects. Examples of powdered alkaline agents include (A1) silicates, (A2) metasilicates, carbonates, bicarbonates, carbamates, phosphates, organic amines, and basic amino acids. Specific examples of (A1) silicates include sodium silicate, potassium silicate, and calcium silicate. Specific examples of (A2) metasilicates include sodium metasilicate and potassium metasilicate. Specific examples of carbonates include sodium carbonate and ammonium carbonate. Specific examples of bicarbonates include sodium bicarbonate and ammonium bicarbonate. Specific examples of carbamates include ammonium carbamate. Specific examples of phosphates include triammonium phosphate and diammonium hydrogen phosphate. Specific examples of organic amines include 2-amino-2-methyl-1-propanol (AMP), 2-amino-2-methyl-1,3-propanediol, and guanidine. Specific examples of basic amino acids include arginine and lysine. These alkaline agents are contained in combination of two or more. Among these, from the viewpoint of excellent effect of improving hair bleaching power, it is preferable to contain (A1) silicate as the alkaline agent, and it is more preferable to contain (A1) silicate and (A2) metasilicate.

[0044] (A1) Silicates and (A2) Metasilicates are compounds that consist of a binary mixture of silicon dioxide and a metal oxide salt (anhydrous, e.g., M(I)2O·nSiO2) or a ternary mixture with water (e.g., M(I)2O·nSiO2·mH2O). Note that M(I)2O can also be replaced by M(II)O or M(III)2O3.

[0045] Silicates and metasilicates are distinguished by the ratio of these ingredients (Gypsum & Lime No. 231 (1991) p131-141). (A1) silicates do not include (A2) metasilicates and orthosilicates. (A1) silicates include, for example, sodium silicate: Na2O·nSiO2·mH2O (n=2-4). (A2) metasilicates include, for example, sodium metasilicate: Na2O·nSiO2·mH2O (n=1). Metasilicates have a structure in which tetrahedral SiO4 atoms are linked in a chain, sharing oxygen.

[0046] Comparing (A1) silicate and (A2) metasilicate, (A2) metasilicate has chemical properties such as lower bulkiness and less heat generation during use. The lower limit of the mass ratio (A2 / A1) of the content of (A2) metasilicate to the content of (A1) silicate can be set appropriately, but is preferably 0.1 or more, more preferably 0.5 or more. When this mass ratio is 0.1 or more, the hair bleaching power is further improved while suppressing an increase in bulk. The upper limit of this mass ratio (A2 / A1) can be set appropriately, but is preferably 2 or less, more preferably 1.5 or less. When this mass ratio is 2 or less, the hair bleaching power is further improved while suppressing heat generation. Note that ranges combining the above upper and lower limits are also contemplated.

[0047] In the persulfate-containing composition, the lower limit of the total content of the powdered alkaline agent (A) is preferably 25% by mass or more, more preferably 30% by mass or more. When the total content of the powdered alkaline agent (A) is 25% by mass or more, the hair bleaching power is improved. In the persulfate-containing composition, the upper limit of the total content of the powdered alkaline agent (A) is appropriately set, but is preferably 50% by mass or less, more preferably 40% by mass or less. When the total content of the powdered alkaline agent (A) is 50% by mass or less, heat generation during use is reduced. Note that ranges obtained by arbitrarily combining the above upper and lower limits are also contemplated.

[0048] When the silicate (A1) is used as the powdered alkaline agent (A), the lower limit of the content of the silicate (A1) in the persulfate-containing composition can be appropriately set, but is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more. A content of 5% by mass or more further improves the hair bleaching power. Furthermore, heat generation during use can be further reduced. The upper limit of the silicate (A1) content can be appropriately set, but is preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less. A content of 30% by mass or less further improves the hair bleaching power. Furthermore, the bulk of the persulfate-containing composition can be further reduced. Any combination of the above upper and lower limits is also contemplated.

[0049] When (A2) metasilicate is used as (A) powdered alkaline agent, the lower limit of the content of (A2) metasilicate in the persulfate-containing composition can be set as appropriate, but is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more. A content of 5% by mass or more further improves the hair bleaching power. It also further reduces the bulk of the persulfate-containing composition. The upper limit of the content of (A2) metasilicate can be set as appropriate, but is preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less. A content of 30% by mass or less further improves the hair bleaching power. It also further reduces heat generation during use. Any combination of the above upper and lower limits is also contemplated.

[0050] (persulfates) Specific examples of persulfates include ammonium persulfate, potassium persulfate, sodium persulfate, etc. These persulfates may be used alone or in combination of two or more.

[0051] In the persulfate-containing composition, the lower limit of the total content of persulfates is preferably 20% by mass or more, more preferably 30% by mass or more, and even more preferably 40% by mass or more. When the total content of persulfates is 20% by mass or more, the hair bleaching power is improved. In the persulfate-containing composition, the upper limit of the total content of persulfates is appropriately set, but is preferably 70% by mass or less, more preferably 60% by mass or less. When the total content of persulfates is 70% by mass or less, the content of (A) powdery alkaline agent can be increased. Note that ranges obtained by arbitrarily combining the above upper and lower limits are also contemplated.

[0052] (Dosage form) From the viewpoint of improving the storage stability of the persulfate, the first agent is preferably prepared in a solid form at 25°C. The solid dosage form is not particularly limited and may be a powder, granules, tablets, or the like. When the first agent is prepared in a solid form, it may contain excipients and dispersants as other ingredients. The first agent may also contain other ingredients as described in the section on the third agent, if necessary.

[0053] Specific examples of excipients include sodium sulfate, magnesium carbonate, etc. Specific examples of dispersants include metal stearates such as calcium stearate and magnesium stearate, silicic anhydride, talc, crystalline cellulose, starch, low-substituted hydroxypropyl cellulose, etc.

[0054] These other components may be used alone or in combination of two or more. The first, second, and third agents are mixed in an appropriate ratio to obtain a mixture, which is then used in a bleaching / decolorizing treatment according to a conventional method. The mixing ratio of the first agent: the second agent: the third agent is not particularly limited, but is, for example, 0.1-1:0.3-1.7:0.1-1.2, preferably 0.2-0.6:0.6-1.3:0.3-1. Any combination of the upper and lower limits above is also contemplated. By specifying the ratio within such a range, the mixing properties can be further improved.

[0055] (Effects of the first embodiment) The effects of the first hair bleaching / decoloring composition of the first embodiment will be described. (1-1) The first hair bleaching / decoloring composition contains two or more powdered alkaline agents (A) in the first agent as a persulfate-containing composition, and the total content of the powdered alkaline agents (A) is set to 25% by mass or more. Therefore, the bleaching power can be improved while suppressing an increase in bulk. Powdered persulfate-containing compositions tend to increase in bulk more easily than liquid formulations such as creams. The hair bleaching / decoloring composition of this embodiment suppresses an increase in bulk, making it easy to fill the composition into a specified container, for example. This also improves operability.

[0056] (1-2) When the powdered alkaline agent (A) contains (A1) silicate and (A2) metasilicate, and the mass ratio (A2 / A1) of the content of the (A1) silicate to the content of the (A2) metasilicate is 0.1 or more and 2 or less, the hair bleaching power can be further improved while suppressing an increase in bulk.

[0057] (1-3) When the powdered alkaline agent (A) contains silicate (A1) and the content of silicate (A1) in the first agent is 10% by mass or more, the hair bleaching power can be further improved and heat generation during use can be further reduced.

[0058] (Second embodiment) A second hair bleaching / dyeing composition will now be described as a second embodiment of the hair bleaching / dyeing composition of the present invention. The second hair bleaching / dyeing composition may be a multi-component composition, such as a two-component hair bleaching / dyeing composition or a three-component hair bleaching / dyeing composition. The components of the three-component second hair bleaching / dyeing composition will now be described, focusing on the differences from the first embodiment.

[0059] (Triple-component second hair bleaching and dye removal composition) The three-component second hair bleaching / decoloring composition comprises, for example, a first component as a persulfate-containing composition containing persulfate, etc., a second component as an oxidizing agent-containing composition containing an oxidizing agent, etc., and a third component as an alkaline agent-containing composition containing an alkaline agent, etc. Note that even if an alkaline agent is blended into the persulfate-containing composition, the composition containing the persulfate is still considered to be a persulfate-containing composition.

[0060] The second and third agents may be the same as those described in the first embodiment. (First agent) The first agent contains (A) a powdered alkaline agent and a persulfate. The first agent may contain other components such as an excipient and a dispersant as necessary.

[0061] ((A) Powdered alkaline agent) The same as those described in the first embodiment can be applied. However, in the second embodiment, the powdered alkaline agent (A) may be contained alone or in combination of two or more.

[0062] In the persulfate-containing composition of this embodiment, the lower limit of the total content of the powdered alkaline agent (A) is preferably 20% by mass or more, more preferably 25% by mass or more, and even more preferably 30% by mass or more. When the total content of the powdered alkaline agent (A) is 20% by mass or more, the hair bleaching power is improved. In the persulfate-containing composition, the upper limit of the total content of the powdered alkaline agent (A) is appropriately set, but is preferably 50% by mass or less, more preferably 40% by mass or less. When the total content of the powdered alkaline agent (A) is 50% by mass or less, heat generation during use is reduced. Note that ranges obtained by arbitrarily combining the above upper and lower limits are also contemplated.

[0063] (Components with a bulk density of 0.5g / mL or less) The first agent is specified such that the total content of components with a bulk density of 0.5 g / mL or less is 5.5% by mass or less. The bulk density is determined as the loose bulk density. More specifically, the loose bulk density is determined by dividing the mass when lightly packed into a certain volume by the volume. The smaller the bulk density, i.e., the loose bulk density, the greater the bulk. The bulk density varies depending on the particle size of the components, the porosity of the particles, etc., but specific examples of components with a bulk density of 0.5 g / mL or less include magnesium carbonate (0.24 g / mL), magnesium stearate (0.12 g / mL), and anhydrous silicic acid (0.07 g / mL).

[0064] The first agent preferably contains 5.5% by mass or less of components with a bulk density of 0.5 g / mL or less in total, more preferably 5% by mass or less, and even more preferably 4.5% by mass or less. When the content is 5.5% by mass or less, the increase in the bulk of the first agent can be suppressed, and the amount of powdered alkaline agent added can be increased.

[0065] The bulk density of the first agent as a whole is preferably 0.7 g / mL or more, more preferably 0.8 g / mL or more. When the bulk density is 0.7 g / mL or more, the first agent has a small volume, which makes it easy to fill into a specified container, for example. This also improves operability. The bulk density of the first agent as a whole is also determined as a loose bulk density (loose bulk density).

[0066] Other than that, the same persulfate, excipient, dispersant, and dosage form as those described in the first embodiment can be applied. Furthermore, the first agent may contain other components described in the third agent section as necessary.

[0067] (Effects of the second embodiment) The effects of the second hair bleaching / decoloring composition of the second embodiment will be described below. In addition to the effects of the first embodiment, the second embodiment has the following effects.

[0068] (2-1) The second hair bleaching / decoloring composition contains a first agent as a persulfate-containing composition, which contains (A) a powdered alkaline agent, and the total content of components with a bulk density of 0.5 g / mL or less is specified to be 5.5% by mass or less. Therefore, the increase in bulk of the first agent can be suppressed, allowing the blending amount of powdered alkaline agent to be increased. This improves the hair bleaching power. Furthermore, since the hair bleaching / decoloring composition of this embodiment suppresses the increase in bulk, it can be easily filled into, for example, a specified container. This also improves operability.

[0069] (2-2) When the bulk density of the first agent is 0.7 g / mL or more, the first agent has a small volume, which makes it easy to fill a specified container, for example. This also improves operability.

[0070] (Example of change) The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0071] The hair bleaching / dyeing compositions of the first and second embodiments have been described as three-component hair bleaching / dyeing compositions. However, the hair bleaching / dyeing composition may omit the third component, which is an alkaline agent-containing composition containing an alkaline agent, etc. Alternatively, the hair bleaching / dyeing composition may be configured as a two-component hair bleaching / dyeing composition consisting of a first component, which is a persulfate-containing composition containing a persulfate, etc., and a second component, which is an oxidizing agent-containing composition containing an oxidizing agent, etc.

[0072] In two-component hair bleaching / decoloring compositions, the first and second components are mixed in an appropriate ratio to obtain a mixture, which is then used in a bleaching / decoloring treatment according to conventional methods. The mixing ratio of the first component to the second component is not particularly limited, but is, for example, 0.1-1:0.3-1.7, preferably 0.2-0.6:0.6-1.3. Any combination of the above upper and lower limits is also contemplated. By specifying the ratio within such a range, mixing properties can be further improved.

[0073] The configurations of the hair bleaching / decoloring compositions of the first and second embodiments may be combined. For example, the persulfate-containing composition may comprise two or more powdered alkaline agents (A), the total content of the powdered alkaline agents (A) being 25% by mass or more, the powdered alkaline agents (A) including silicate (A1), the content of silicate (A1) in the persulfate-containing composition being 10% by mass or more, and the total content of components with a bulk density of 0.5 g / mL or less in the persulfate-containing composition being 5.5% by mass or less.

[0074] In the above-described first, second, or third agent, some of the ingredients contained in each agent may be formulated as separate agents, which may then be mixed immediately before use to prepare the first, second, or third agent. For example, during storage, some of the ingredients constituting the first, second, or third agent may be formulated as separate agents, further increasing the number of dosage forms, which may then be mixed immediately before use to prepare the first, second, or third agent. [Example]

[0075] Next, the above-described embodiment will be described in more detail with reference to examples and comparative examples. Note that the present invention is not limited to the configurations described in the examples section. <Test Example 1> First to third agents were prepared as hair bleaching / decoloring compositions containing the components shown in Tables 1 to 4. The numerical values ​​in the columns for each component in each table indicate the content of that component, expressed in mass %. The designations "A1" and "A2" in the tables refer to the compounds corresponding to the components (A1) and (A2) in the claims of the present application. The "A2 / A1 mass ratio" indicates the mass ratio of the content of component (A2) to the content of component (A1) in the first agent. The "content of components with a bulk density of 0.5 g / mL or less" indicates the total content of components with a bulk density of 0.5 g / mL or less in the first agent. Each of the resulting hair bleaching / decoloring compositions was evaluated for bulkiness, bleaching power, and heat generation, as shown below.

[0076] The sodium silicate used was of the Na2O·nSiO2·mH2O (n=2 to 2.2) standard, and the sodium metasilicate was of the Na2O·nSiO2 (n=0.9 to 1.1) standard.

[0077] (bulk) The entire first agent was mixed, and the crude bulk density was measured. More specifically, 10 g of the mixed and prepared first agent was weighed into a medicine wrapping paper and added to a 25 mL measuring cylinder, the volume was confirmed, and the bulk density (g / mL) was calculated. The calculated bulk density (g / mL) was evaluated according to the following criteria.

[0078] A bulk density of 0.8 g / mL or more was evaluated as "excellent: 3," a bulk density of 0.7 g / mL or more but less than 0.8 g / mL was evaluated as "good: 2," and a bulk density of less than 0.7 g / mL was evaluated as "poor: 1." The results are shown in the "Bulkiness" column in Tables 1 and 2.

[0079] (Decolorizing power) To 10 g of a hair bundle sample (identical human hair, hair diameter: 75 to 95 micrometers), 23.1 g of a mixture of hair bleaching and decolorizing compositions, consisting of a first agent, a second agent, and a third agent mixed in a mass ratio of 0.7:2:1, was applied and treated at 37°C for 35 minutes. The hair bundle was then washed with water and shampooed twice with Bigen Treatment Shampoo (manufactured by Hoyu Co., Ltd.) and rinsed once with Bigen Treatment Rinse (manufactured by Hoyu Co., Ltd.). The hair bundle was then dried with warm air to obtain a treated hair bundle for each example. The bleaching power of the hair was visually evaluated by five panelists under a standard light source. Using the bleaching power of Comparative Example 1 as the standard, a score of 3 was given for significantly more bleached hair than the hair bundle of Comparative Example 1, a score of 2 for more bleached hair than the hair bundle of Comparative Example 1, and a score of 1 for bleaching power equal to or less than the hair bundle of Comparative Example 1.

[0080] The arithmetic mean of the scores from each panelist was calculated and rounded to the nearest decimal place. An average score of 2.6 points or more was rated as "excellent: 3," 1.6 points or more but less than 2.6 points was rated as "good: 2," and less than 1.6 points was rated as "poor: 1." The results are shown in the "Bleaching Power" column in Tables 1 and 2.

[0081] (Fever) 25 g of the first agent was added to 5 g of water at room temperature of 25°C and mixed well to prepare an aqueous solution of the first agent. The temperature was measured after 10 minutes and evaluated according to the following evaluation criteria.

[0082] The evaluation was made as follows: "Excellent: 3" when the temperature of the aqueous solution of the first agent was less than 35°C, "Good: 2" when the temperature of the aqueous solution of the first agent was 35°C or more but less than 45°C, and "Poor: 1" when the temperature of the aqueous solution of the first agent was 45°C or more. The results are shown in the "Heat" column in Tables 1 and 2.

[0083] [Table 1]

[0084] [Table 2]

[0085] [Table 3]

[0086] [Table 4] As shown in Tables 1 and 2, each Example achieved good or better results for each evaluation item. Comparative Example 1, which contained only anhydrous sodium metasilicate as a powdered alkaline agent and had a total content of components with a bulk density of 0.5 g / mL or less exceeding 5.5% by mass, was evaluated as inferior in bleaching power compared to each Example. Comparative Example 2, which contained only sodium silicate as a powdered alkaline agent and had a total content of components with a bulk density of 0.5 g / mL or less exceeding 5.5% by mass, was evaluated as inferior in bleaching power and bulkiness compared to each Example. Comparative Example 3, which had the same configuration as Comparative Example 1 but with an increased amount of anhydrous sodium metasilicate, was evaluated as inferior in bulkiness and heat generation compared to each Example.

[0087] <Test Example 2> The second and third agents used in Test Example 1 were replaced with the oxidizing agent-containing composition (second agent) and alkaline agent (third agent) of commercially available Beauty Teen Base Up Bleach (manufactured by Hoyu Co., Ltd.), and the same evaluations as in Test Example 1 were carried out. The first agent:second agent:third agent were mixed in a ratio of 0.32:1:0.5. The method of use followed the method of use for Beauty Teen Base Up Bleach. As a result, evaluations similar to those of the examples in Test Example 1 were obtained.

[0088] <Test Example 3> In Test Example 3, the third agent in Test Example 1 was omitted, and a two-part hair bleaching / decoloring composition consisting of the first and second agents was used, and evaluations were carried out in the same manner as in Test Example 1. The first and second agents were mixed in a ratio of 1:2.5. As a result, evaluations similar to those of the examples in Test Example 1 were obtained.

Claims

1. A hair bleaching / decoloring composition comprising an oxidizing agent-containing composition and a persulfate-containing composition, The persulfate-containing composition is a hair bleaching / decoloring composition that contains two or more types of powdered alkaline agents (A), and the total content of the powdered alkaline agents (A) is 25 mass% or more.

2. A hair bleaching / decoloring composition comprising an oxidizing agent-containing composition and a persulfate-containing composition, The persulfate-containing composition is a hair bleaching / decoloring composition that contains (A) a powdered alkaline agent and has a total content of components with a bulk density of 0.5 g / mL or less of 5.5 mass% or less.

3. 3. The hair bleaching / decoloring composition according to claim 1, wherein the powdery alkaline agent (A) contains a silicate (A1) and a metasilicate (A2), and the mass ratio (A2 / A1) of the content of the silicate (A1) to the content of the metasilicate (A2) is 0.1 or more and 2 or less.

4. 3. The hair bleaching / decoloring composition according to claim 1, wherein the powdery alkaline agent (A) contains a silicate (A1), and the content of the silicate (A1) in the persulfate-containing composition is 10% by mass or more.

5. 3. The hair bleaching / decoloring composition according to claim 1, wherein the bulk density of the persulfate-containing composition is 0.7 g / mL or more.

6. A hair bleaching / decoloring composition comprising an oxidizing agent-containing composition and a persulfate-containing composition, The persulfate-containing composition contains two or more powdery alkaline agents (A), and the total content of the powdery alkaline agents (A) is 25% by mass or more, A hair bleaching / decoloring composition, wherein the powdery alkaline agent (A) contains silicate (A1), the content of silicate (A1) in the persulfate-containing composition is 10% by mass or more, and the total content of components having a bulk density of 0.5 g / mL or less in the persulfate-containing composition is 5.5% by mass or less.

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