Carbonate foaming composition

Abstract

To provide a carbonate foaming composition which has high storage stability, reduced roughness in tactile sensation, and favorable feeling upon use.SOLUTION: A carbonate foaming composition comprises a carbonate and an organic acid, the composition comprising: particles (A) containing the carbonate and particles (B) containing the organic acid, wherein: the particles (A) do not contain the organic acid, and the particles (B) do not contain the carbonate; the median diameter of carbonate particles (a), which are raw materials for the particles (A), is 170 μm or less, and the median diameter of organic acid particles (b), which are raw materials for the particles (B), is 500 μm or less; the median diameter of at least one of the particles (A) and the particles (B) is 80 μm or more; the median diameter of the particles (A) is equal to or greater than that of the carbonate particles (a); and the median diameter of the particles (B) is equal to or greater than that of the organic acid particles (b).SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a carbonated foaming composition.

Background Art

[0002] In recent years, foam-type shampoos, facial cleansers, and body soaps have attracted attention from the viewpoint of easy availability. Among these, a foaming composition for cosmetics that generates fine bubbles of carbon dioxide gas by utilizing the property that a mixture of a carbonate and an organic acid generates carbon dioxide gas by adding a small amount of water has been reported (Patent Document 1). It is disclosed that this foaming composition for cosmetics can be used as a facial cleansing soap, shaving foam, shampoo, or body soap. However, in the foaming composition for cosmetics described in Patent Document 1, even if there is a trace amount of water in the mixture of the carbonate and the organic acid, carbon dioxide gas is generated during storage, and water is generated as a by-product by the reaction, so the reaction occurs chain-reaction, and as a result, there are problems such as the package swelling or the foaming property decreasing during use.

[0003] Regarding this problem, techniques for improving storage stability have been reported. For example, Patent Document 2 discloses foaming granules containing an oily component and having a particle diameter of 150 μm to 1500 μm, which have improved storage stability. Further, Patent Document 3 discloses a bath agent composition having good storage stability by containing the following components (A) to (C): (A) 25 to 55% by mass of an alkali metal carbonate in which particles having a particle diameter of 180 μm or more are 50% or more, (B) 40 to 70% by mass of an organic acid in which particles having a particle diameter of 180 μm or more are 50% or more, and (C) 0.01 to 10% by mass of a hardly water-soluble metal oxide.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

[0005] However, since the technique described in Patent Document 2 uses a compression granulation method, the instant solubility of the granules decreases. Therefore, when this technique is used for a carbonated foaming composition used when manually foaming shampoo or the like, roughness is caused by the undissolved components, and the feel during use deteriorates, so it has been found that the usability is impaired. Further, Patent Document 3 is a technique related to a bath agent. When the bath agent composition dissolves on the surface of the bath water, carbon dioxide gas escapes without being sufficiently dissolved in the bath water. Therefore, in order to dissolve the bath agent composition in the bath water, it is necessary to sink the bath agent composition in the bath water and keep it in the bath water for a certain period of time. Therefore, it is a prerequisite to use raw material particles having a certain particle size as the particles constituting the bath agent composition. On the other hand, in the carbonated foaming composition used when manually foaming, instant solubility that allows instant dissolution in a small amount of liquid in a short time is required. Therefore, when particles having a large particle size are used as the carbonated foaming composition, the solubility is poor, and the same problem of roughness occurs. Different from bath agents, carbonated foaming compositions are applied to hair and the body and directly touch the skin, so a delicate touch is required. Accordingly, an object of the present invention is to provide a carbonated foaming composition having high storage stability, suppressed roughness of the touch, and good usability. [Means for Solving the Problems]

[0006] As a result of investigations, the inventors of the present invention have found that a carbon dioxide foaming composition containing a carbonate and an organic acid, wherein the carbonate and the organic acid are each contained in the form of independent particles as particles (A) containing a carbonate (hereinafter also simply referred to as "particles (A)") and particles (B) containing an organic acid (hereinafter also simply referred to as "particles (B)"), and the median diameters of the particles (a) of the carbonate (hereinafter also referred to as "carbonate particles (a)") and the particles (b) of the organic acid (hereinafter also referred to as "organic acid particles (b)"), which are the respective raw materials, are not more than a predetermined value, the median diameter of at least one of the particles (A) and the particles (B) is not less than a predetermined value, and the median diameters of the particles (A) and the particles (B) are not less than the median diameters of the respective raw material particles, solves the above problems. The present invention relates to the following. A carbon dioxide foaming composition containing a carbonate and an organic acid, the carbon dioxide foaming composition contains particles (A) containing the carbonate and particles (B) containing the organic acid, the particles (A) do not contain an organic acid, and the particles (B) are particles that do not contain a carbonate, the median diameter of the carbonate particles (a), which are the raw materials of the particles (A), is not more than 170 μm, and the median diameter of the organic acid particles (b), which are the raw materials of the particles (B), is not more than 500 μm, the median diameter of at least one of the particles (A) and the particles (B) is not less than 80 μm, the median diameter of the particles (A) is not less than the median diameter of the carbonate particles (a), and the median diameter of the particles (B) is not less than the median diameter of the organic acid particles (b), A carbon dioxide foaming composition.

Effects of the Invention

[0007] According to the present invention, it is possible to provide a carbon dioxide foaming composition having high storage stability, suppressed roughness of the feel, and good usability.

Modes for Carrying Out the Invention

[0008] The carbon dioxide foaming composition of the present invention is a carbon dioxide foaming composition containing a carbonate and an organic acid, The carbonated foaming composition contains particles (A) containing the carbonate and particles (B) containing the organic acid, the particles (A) do not contain an organic acid, and the particles (B) are particles that do not contain a carbonate, the median diameter of the carbonate particles (a) which are the raw material of the particles (A) is 170 μm or less, and the median diameter of the organic acid particles (b) which are the raw material of the particles (B) is 500 μm or less, the median diameter of at least one of the particles (A) and the particles (B) is 80 μm or more, the median diameter of the particles (A) is not less than the median diameter of the carbonate particles (a), and the median diameter of the particles (B) is not less than the median diameter of the organic acid particles (b). The carbonated foaming composition of the present invention is in the form of powder or granules, and is used, for example, to foam surfactant-containing compositions such as shampoos and conditioning agents into a foamy dosage form. Therefore, the carbonated foaming composition of the present invention is applied to the surface of the human body including the skin and hair in combination with a surfactant-containing composition. Therefore, when foamed, a good feeling in use without a rough touch is required, and it is necessary to dissolve immediately in a short time, and it is desirable that the particle size of the particles constituting the carbonated foaming composition is small. However, when the particle size of the carbonated foaming composition is small, even if a hygroscopic agent is added, its effect is not sufficient, the generation of carbon dioxide gas in the packaging material cannot be suppressed, and it has been found that the storage stability is poor. Further, as a result of repeated studies, it has been found that in order to suppress the generation of carbon dioxide gas during storage, it is necessary to increase the particle size of the carbonate and the organic acid to a specific value or more. As a result of intensive research to solve this conflicting requirement, the present inventors have found that by setting the diameter of the raw material particles and the diameter of the particles constituting the produced carbonated foaming composition within specific ranges, it is possible to achieve both immediate solubility and storage stability. That is, according to the carbonated foaming composition of the present invention, the median diameter of the carbonate particles (a) and the organic acid particles (b) is below a predetermined value, and the median diameter of at least one of the particles (A) containing carbonate and the particles (B) containing organic acid is above a predetermined value, the median diameter of the particles (A) is above the median diameter of the carbonate particles (a) which are its raw materials, and the median diameter of the particles (B) is above the median diameter of the organic acid particles (b) which are its raw materials, whereby the storage stability can be enhanced, and the rough touch during use can be suppressed to obtain a good feeling in use. In addition, the carbonate and the organic acid can be contained in the form of independent particles as the particles (A) containing carbonate and the particles (B) containing organic acid, respectively, to further improve the storage stability and the foaming property.

[0009] The carbonated foaming composition of the present invention may contain a surfactant as long as it does not inhibit the efficacy of the surfactant-containing composition used in combination. The content of the surfactant may be less than 10% by mass, may be 7% by mass or less, may be 5% by mass or less, and may be 1% by mass or more, may be 2% by mass or more, may be 3% by mass or more. Regarding the surfactant-containing composition, it will be described in detail in the section on the method of using the powdery or granular carbonate composition.

[0010] <Surfactant> Examples of the surfactant used in the present invention include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants, and one or more of these can be used. Specific examples of each are shown below.

[0011] 〔Anionic surfactant〕 Specific examples of the anionic surfactant include N-acyl amino acid salts, N-acyl-N-methyl amino acid salts, fatty acid salts, salts of esters of fatty acids having 5 to 18 carbon atoms and isethionic acid, alkyl or alkenyl sulfonate salts having 10 to 18 carbon atoms, polyoxyalkylene alkyl ether sulfate ester salts, and linear alkylbenzene sulfonate salts, etc.

[0012] Examples of the counter ions of the anionic group of the anionic surfactant include alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; alkanol ammonium having 1 to 3 alkanol groups having 2 or 3 carbon atoms (for example, monoethanol ammonium, diethanol ammonium, triethanol ammonium, triisopropanol ammonium, etc.), and sodium ions and potassium ions are preferred, and sodium ions are more preferred.

[0013] 〔Cationic surfactant〕 Examples of the cationic surfactant include quaternary ammonium salts such as alkyltrimethylammonium salts, alkoxyalkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylamidealkyltrimethylammonium salts, benzalkonium chloride, and alkylpyridinium salts.

[0014] As the counter ion of the cationic group of the cationic surfactant, examples include alkyl sulfate ions having 1 to 3 carbon atoms, sulfate ions, phosphate ions, carboxylic acid ions having 1 to 3 carbon atoms (formate ions, acetate ions, propionate ions), and halide ions such as chloride ions and bromide ions. Among these, from the viewpoints of ease of production and availability of raw materials, halide ions are preferred, and chloride ions are more preferred.

[0015] Amphoteric surfactant Examples of the amphoteric surfactant include one or more selected from the group consisting of alkylamine oxides having an alkyl group with 10 to 18 carbon atoms and alkylbetaines having an alkyl group with 10 to 18 carbon atoms.

[0016] Nonionic surfactant Specific examples of the nonionic surfactant include one or more selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyoxyethylene fatty acid ester, alkyl glucoside, alkyl alkanolamide, alkyl glyceryl ether, higher fatty acid sucrose ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, and alkyl saccharide. Among the above, from the viewpoints of good solubility in water and good foaming, anionic surfactants are preferred, and salts of esters of fatty acids having 5 to 18 carbon atoms and isethionic acid are more preferred. Also, from the viewpoint of low irritation, amino acid-based anionic surfactants such as N-acyl amino acid salts and N-acyl-N-methyl amino acid salts are preferred.

[0017] Carbonate, particles containing carbonate (A) The carbonated foaming composition of the present invention contains a carbonate. The carbonate is contained in the form of particles (A) containing carbonate in the carbonated foaming composition of the present invention. As the particles (A) containing a carbonate used in the carbonated foam composition of the present invention, the carbonate particles (a) as a raw material may be used as they are, granulated particles obtained by granulating the carbonate particles (a) may be used, or a mixture thereof may be used. The particles (A) do not contain an organic acid. Here, "do not contain" means substantially not containing, and the amount of the organic acid in the particles (A) is preferably less than 1% by mass, and more preferably 0% by mass.

[0018] Examples of the carbonate used in the present invention include dialkali metal carbonates such as sodium carbonate and potassium carbonate; alkali metal hydrogen carbonates such as sodium hydrogen carbonate and potassium hydrogen carbonate; and the like. One or more of these can be used. Among the above, from the viewpoint of improving foamability, the carbonate preferably contains one or more selected from the group consisting of sodium carbonate (Na2CO3) and sodium hydrogen carbonate (NaHCO3), and more preferably contains sodium hydrogen carbonate. The content of one or more selected from the group consisting of sodium carbonate and sodium hydrogen carbonate in the carbonate is preferably 80% by mass or more, more preferably 90% by mass or more, and preferably 100% by mass or less, and more preferably 100% by mass, from the viewpoint of improving foamability.

[0019] From the viewpoint of improving foamability, the content of the carbonate in the carbonated foam composition is preferably 15% by mass or more, more preferably 25% by mass or more, still more preferably 30% by mass or more, and even more preferably 35% by mass or more. From the viewpoint of improving foam retention, it is preferably 65% by mass or less, more preferably 60% by mass or less, still more preferably 55% by mass or less. And the content of the carbonate in the carbonated foam composition is preferably 15% by mass or more and 65% by mass or less, more preferably 25% by mass or more and 60% by mass or less, still more preferably 30% by mass or more and 55% by mass or less, and even more preferably 35% by mass or more and 55% by mass or less.

[0020] <Organic acid, particles (B) containing an organic acid> The carbonated foam composition of the present invention contains an organic acid. The organic acid is contained in the carbonated foam composition of the present invention in the form of particles (B) containing the organic acid. As the particles (B) containing an organic acid used in the carbonated foam composition of the present invention, the raw material organic acid particles (b) may be used as they are, granulated particles obtained by granulating the organic acid particles (b) may be used, or a mixture thereof may be used. The particles (B) do not contain a carbonate. Here, "do not contain" means substantially not containing, and the amount of carbonate in the particles (B) is preferably less than 1% by mass, more preferably 0% by mass.

[0021] Examples of the organic acid used in the present invention include citric acid, tartaric acid, malic acid, malonic acid, pyridonecarboxylic acid, succinic acid, fumaric acid, adipic acid, glutaric acid, ascorbic acid, etc., and one or more of these can be used. Among the above, from the viewpoints of foamability and solubility in water, the organic acid preferably contains one or more selected from the group consisting of citric acid, succinic acid, tartaric acid, and ascorbic acid, more preferably contains citric acid. The content of one or more selected from the group consisting of citric acid, succinic acid, tartaric acid, and ascorbic acid in the organic acid is preferably 80% by mass or more, more preferably 90% by mass or more, and preferably 100% by mass or less, more preferably 100% by mass, from the viewpoint of improving foamability.

[0022] From the perspective of improving foamability, the content of the organic acid in the carbonated foaming composition is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass or more, and even more preferably 20% by mass or more. From the perspective of improving foam retention, it is preferably 60% by mass or less, more preferably 50% by mass or less, still more preferably 45% by mass or less, even more preferably 40% by mass or less, and even more preferably 35% by mass or less. And the content of the organic acid in the carbonated foaming composition is preferably 5% by mass or more and 60% by mass or less, more preferably 10% by mass or more and 50% by mass or less, still more preferably 10% by mass or more and 45% by mass or less, even more preferably 15% by mass or more and 40% by mass or less, and even more preferably 20% by mass or more and 35% by mass or less.

[0023] In the carbonated foaming composition, the mass ratio of the organic acid to the carbonate [organic acid / carbonate] is preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.2 or more from the perspective of foamability, and preferably 10 or less, more preferably 5.0 or less, still more preferably 1.0 or less. And the mass ratio of the organic acid to the carbonate [organic acid / carbonate] is preferably 0.05 or more and 10 or less, more preferably 0.1 or more and 5.0 or less, still more preferably 0.2 or more and 1.0 or less.

[0024] From the perspective of foamability, the total amount of the carbonate and the organic acid in the carbonated foaming composition is preferably 50% by mass or more, more preferably 60% by mass or more, still more preferably 65% by mass or more, and from the perspective of improving foam retention, it is preferably 90% by mass or less, more preferably 85% by mass or less, still more preferably 80% by mass or less. And the total amount of the carbonate and the organic acid in the carbonated foaming composition is preferably 50% by mass or more and 90% by mass or less, more preferably 60% by mass or more and 85% by mass or less, still more preferably 65% by mass or more and 80% by mass or less.

[0025] <Desiccant> The carbonated foaming composition of the present invention preferably further contains a desiccant. Examples of the moisture absorbent used in the present invention include alkaline earth metal oxides such as magnesium oxide, calcium oxide, and zinc oxide. Among these, magnesium oxide is preferable from the viewpoints of storage stability and foamability.

[0026] From the viewpoint of improving storage stability, the content of the moisture absorbent in the carbon dioxide foaming composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, still more preferably 1% by mass or more, even more preferably 2% by mass or more, and even more preferably 4% by mass or more. From the viewpoint of improving foamability, it is preferably 15% by mass or less, more preferably 12% by mass or less, and still more preferably 10% by mass or less. The content of the moisture absorbent in the carbon dioxide foaming composition is preferably 0.01% by mass or more and 15% by mass or less, more preferably 0.1% by mass or more and 12% by mass or less, still more preferably 1% by mass or more and 12% by mass or less, even more preferably 2% by mass or more and 10% by mass or less, and even more preferably 4% by mass or more and 10% by mass or less.

[0027] <Other components> The carbon dioxide foaming composition of the present invention may contain, as other components, components generally used in carbon dioxide foaming compositions, as long as the object of the present invention is not impaired. Examples of such other components include excipients, water-soluble polymers, thickeners, natural pigments, humectants, anti-inflammatory agents, bactericides, antiperspirants, antioxidants, fragrances, and mixtures thereof. Note that the carbon dioxide foaming composition of the present invention preferably does not substantially contain oily components such as fragrances from the viewpoint of foamability, and the content of the oily component is preferably less than 2% by mass, more preferably 1.5% by mass or less, still more preferably less than 1.0% by mass, even more preferably 0.5% by mass or less, and even more preferably 0.1% by mass or less in the carbon dioxide foaming composition, and more preferably 0% by mass.

[0028] Examples of the excipients used in the present invention include, for example, silicic acid, silicic anhydride (silica), magnesium silicate, calcium silicate, aluminum silicate, barium silicate, strontium silicate, diatomaceous earth, talc, sericite, mica, kaolin, montmorillonite, clay, bentonite, vermiculite, titanium oxide-coated mica (mica titanium), bismuth oxychloride, boron nitride, zirconium oxide, titanium oxide, lower titanium oxide, metal tungstates, hydroxyapatite, zeolite, ceramic powder, chloroaluminum hydroxide, aluminum chloride, aluminum sulfate, basic aluminum bromide, basic aluminum iodide, chloroaluminum zirconium hydroxide, zinc sulfate, basic aluminum zinc lactate, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, red iron oxide, black iron oxide, yellow iron oxide, ultramarine, navy blue, chromium oxide, chromium hydroxide, calamine, carbon black and other inorganic powders; monosaccharides such as glucose, fructose, galactose, mannose; disaccharides such as lactose, trehalose, maltose; starches such as starch, potato starch; sugar alcohols such as mannitol, maltitol, xylitol, erythritol; etc. One or more of these can be used. From the viewpoints of solubility, granulation property, foaming property, and storage stability, the content of the excipient in the carbonated foam composition is preferably 5% by mass or more, more preferably 10% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, still more preferably 30% by mass or less. And the content of the excipient in the carbonated foam composition is preferably 5% by mass or more and 50% by mass or less, more preferably 10% by mass or more and 40% by mass or less, still more preferably 10% by mass or more and 30% by mass or less.

[0029] From the viewpoint of improving the usability, polysaccharide-based water-soluble polymers are preferred as the water-soluble polymers used in the present invention, and such water-soluble polymers can be used as a touch modifier and a binder during granulation described later. Examples of the water-soluble polymer used in the present invention include semi-synthetic water-soluble polymers such as hydroxyethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, cationized hydroxyethyl cellulose, cationized carboxymethyl cellulose, cationized xanthan gum, cationized carrageenan, and cationized guar gum, and natural water-soluble polymers such as xanthan gum, carrageenan, and guar gum. One or more of these can be used. Among the above, from the viewpoint of stabilizing the foam generated when contacted with the surfactant-containing composition and improving the usability when added to hair cosmetics, as the feel adjuster, preferably a water-soluble cationized polysaccharide, more preferably one or more selected from the group consisting of cationized hydroxyethyl cellulose, cationized carboxymethyl cellulose, cationized xanthan gum, cationized carrageenan, and cationized guar gum, and even more preferably one or more selected from the group consisting of cationized hydroxyethyl cellulose, cationized carboxymethyl cellulose, and cationized guar gum. From the viewpoint of stabilizing the foam generated when added to the surfactant-containing composition and improving the usability when added to hair cosmetics, the content of the water-soluble polymer in the carbonated foam composition is preferably 0.1% by mass or more, more preferably 1.0% by mass or more, even more preferably 2.5% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 10% by mass or less, and even more preferably 5.0% by mass or less. And the content of the water-soluble polymer in the carbonated foam composition is preferably 0.1% by mass or more and 30% by mass or less, more preferably 1.0% by mass or more and 20% by mass or less, even more preferably 1.0% by mass or more and 10% by mass or less, and even more preferably 2.5% by mass or more and 5.0% by mass or less. The content of the feel modifier in the carbonated foaming composition is preferably 0.01% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.8% by mass or more, even more preferably 1.3% by mass or more, and even more preferably 2.3% by mass or more, from the viewpoint of stabilizing the foam generated when contacting with the surfactant-containing composition and improving the feel when used by adding to a surfactant-containing composition such as a hair cosmetic. And it is preferably 29.8% by mass or less, more preferably 25.3% by mass or less, still more preferably 19.8% by mass or less, even more preferably 9.8% by mass or less, and even more preferably 4.8% by mass or less. And the content of the feel modifier in the carbonated foaming composition is preferably 0.01% by mass or more and 29.8% by mass or less, more preferably 0.3% by mass or more and 25.3% by mass or less, still more preferably 0.8% by mass or more and 19.8% by mass or less, even more preferably 1.3% by mass or more and 9.8% by mass or less, and even more preferably 2.3% by mass or more and 4.8% by mass or less.

[0030] <Particle diameters of carbonate particles (a), organic acid particles (b), particles (A), and particles (B)> The median diameter (D50) in the present invention means the particle diameter at which the cumulative volume frequency calculated by the volume fraction becomes 50% when calculated from the smaller particle diameter. Specifically, the median diameter can be measured by the method described in the examples.

[0031] The median diameter of the carbonate particles (a) refers to the median diameter of the carbonate particles that are the raw materials of the particles (A) containing the carbonate. From the viewpoints of improving productivity and storage stability, it is preferably 10 μm or more, more preferably 15 μm or more, still more preferably 20 μm or more. And from the viewpoints of improving foamability and touch feeling, it is 170 μm or less, preferably 150 μm or less, more preferably 120 μm or less, still more preferably 110 μm or less, even more preferably 100 μm or less, even more preferably 95 μm or less, even more preferably 90 μm or less. And the median diameter of the carbonate particles (a) is 170 μm or less, preferably 10 μm or more and 170 μm or less, more preferably 10 μm or more and 150 μm or less, still more preferably 15 μm or more and 120 μm or less, even more preferably 20 μm or more and 110 μm or less, even more preferably 20 μm or more and 100 μm or less, even more preferably 20 μm or more and 95 μm or less, even more preferably 20 μm or more and 90 μm or less. Further, as a more preferable median diameter of the carbonate (carbonate particles (a)) as a raw material when granulating the carbonate particles (a), in addition to the above viewpoints, from the viewpoint of further improving foamability and touch feeling, in addition to the above range, it is even more preferably 100 μm or less, even more preferably 90 μm or less, even more preferably 70 μm or less, and even more preferably 60 μm or less. And it is even more preferably 10 μm or more and 100 μm or less, even more preferably 10 μm or more and 90 μm or less, even more preferably 10 μm or more and 70 μm or less, even more preferably 10 μm or more and 60 μm or less. Further, when the carbonate particles (a) are used without granulation, as a more preferable median diameter of the carbonate particles (a), from the above viewpoints and the viewpoint of the balance between storage stability and touch feeling, in addition to the above range, it is even more preferably 80 μm or more, even more preferably 90 μm or more. And it is even more preferably 80 μm or more and 170 μm or less, even more preferably 80 μm or more and 150 μm or less, even more preferably 90 μm or more and 120 μm or less, even more preferably 90 μm or more and 110 μm or less.

[0032] The median diameter of the organic acid particles (b) refers to the median diameter of the particles of the organic acid that is the raw material of the particles (B) containing the organic acid. From the viewpoints of improving productivity and storage stability, it is preferably 10 μm or more, more preferably 15 μm or more, still more preferably 20 μm or more. And from the viewpoints of good foamability and feel, it is 500 μm or less, preferably 350 μm or less, more preferably 170 μm or less, still more preferably 150 μm or less, even more preferably 120 μm or less, even more preferably 110 μm or less, even more preferably 100 μm or less, even more preferably 95 μm or less, even more preferably 90 μm or less. And the median diameter of the organic acid particles (b) is 500 μm or less, preferably 10 μm or more and 350 μm or less, more preferably 10 μm or more and 170 μm or less, still more preferably 10 μm or more and 150 μm or less, even more preferably 15 μm or more and 120 μm or less, even more preferably 20 μm or more and 110 μm or less, even more preferably 20 μm or more and 100 μm or less, even more preferably 20 μm or more and 95 μm or less, even more preferably 20 μm or more and 90 μm or less. Also, as a more preferable median diameter of the organic acid (organic acid particles (b)) as a raw material when granulating the organic acid particles (b), in addition to the above viewpoints, from the viewpoint of further improving foamability and feel, in addition to the above range, it is more preferably 70 μm or less, even more preferably 60 μm or less, and more preferably 10 μm or more and 110 μm or less. Also, when using the organic acid particles (b) without granulation, as a more preferable median diameter of the organic acid particles (b), from the above viewpoints and the viewpoint of the balance between storage stability and feel, in addition to the above range, it is more preferably 80 μm or more, even more preferably 90 μm or more, and more preferably 80 μm or more and 350 μm or less, more preferably 80 μm or more and 170 μm or less, more preferably 90 μm or more and 150 μm or less, more preferably 90 μm or more and 110 μm or less.

[0033] Also, from the viewpoint of high storage stability, suppression of the roughness of the feel, and good usability, the coefficient of variation CV value represented by the following formula (1) calculated as the value of the standard deviation σ of the particle diameter with respect to the median diameter D of the carbonate particles (a) and the organic acid particles (b) is preferably 95% or less, more preferably 90% or less, and even more preferably 85% or less. Coefficient of variation CV value (%) = [Standard deviation σ of particle diameter] / [Median diameter D] × 100 (Formula (1)) In addition, other raw material components other than the carbonate and the organic acid are preferably those having a median diameter equal to or less than the median diameter of the carbonate particles (a) and the organic acid particles (b), and are usually 170 μm or less, for example, 5 μm or more and 150 μm or less.

[0034] In the carbon dioxide foaming composition of the present invention, the median diameter of at least one of the particles (A) and the particles (B) is 80 μm or more, preferably 90 μm or more, more preferably 100 μm or more, even more preferably 110 μm or more, and still more preferably 120 μm or more. When the median diameter of at least one of the particles (A) and the particles (B) is within such a range, the storage stability is excellent. Further, from the viewpoint of further improving the storage stability, it is preferable that the median diameters of the particles (A) and the particles (B) are both 80 μm or more, more preferably 90 μm or more, and even more preferably 100 μm or more. From the viewpoint of improving productivity, it is preferable that the median diameter of only one of the particles (A) or the particles (B) is 80 μm or more, more preferably 90 μm or more, and even more preferably 100 μm or more.

[0035] From the viewpoint of productivity, the median diameters of the particles (A) and the particles (B) are preferably 500 μm or less, more preferably 450 μm or less, even more preferably 400 μm or less, and still more preferably 350 μm or less. Further, when using the raw material particles as the particles (A) as they are, that is, when the particles (A) are carbonate particles (a), the preferable range of the median diameter of the particles (A) is the same as the preferable range of the median diameter of the carbonate particles (a) in the case of using them without granulation as described above. Also, when using the raw material particles as the particles (B) as they are, that is, when the particles (B) are organic acid particles (b), the preferable range of the median diameter of the particles (B) is the same as the preferable range of the median diameter of the organic acid particles (b) in the case of using them without granulation as described above, respectively.

[0036] When the median diameter of the particles (A) is 80 μm or more, from the viewpoint of storage stability, the median diameter of the particles (A) is preferably 90 μm or more, more preferably 100 μm or more, still more preferably 110 μm or more, and even more preferably 120 μm or more. And from the viewpoint of productivity, it is preferably 500 μm or less, more preferably 400 μm or less, still more preferably 350 μm or less, and even more preferably 300 μm or less. And the median diameter of the particles (A) is preferably 80 μm or more and 500 μm or less, more preferably 90 μm or more and 400 μm or less, still more preferably 100 μm or more and 350 μm or less, even more preferably 110 μm or more and 350 μm or less, even more preferably 110 μm or more and 300 μm or less, and even more preferably 120 μm or more and 300 μm or less. In particular, when the particles (A) are granulated particles, from the same viewpoints as above and the viewpoint of further improving storage stability, it is more preferably 110 μm or more, even more preferably 120 μm or more, and even more preferably 110 μm or more and 350 μm or less, even more preferably 110 μm or more and 300 μm or less, and even more preferably 120 μm or more and 300 μm or less.

[0037] When the median diameter of the particle (B) is 80 μm or more, from the viewpoint of storage stability, the median diameter of the particle (B) is preferably 90 μm or more, more preferably 100 μm or more, still more preferably 110 μm or more, and even more preferably 120 μm or more. From the viewpoint of productivity, it is preferably 500 μm or less, more preferably 400 μm or less, still more preferably 350 μm or less, and even more preferably 300 μm or less. And the median diameter of the particle (B) is preferably 80 μm or more and 500 μm or less, more preferably 90 μm or more and 400 μm or less, still more preferably 100 μm or more and 350 μm or less, even more preferably 110 μm or more and 350 μm or less, even more preferably 110 μm or more and 300 μm or less, and even more preferably 120 μm or more and 300 μm or less. In particular, when the particle (B) is a granulated particle, from the same viewpoints as above and from the viewpoint of further improving storage stability, it is more preferably 110 μm or more, even more preferably 120 μm or more, and even more preferably 110 μm or more and 350 μm or less, even more preferably 110 μm or more and 300 μm or less, and even more preferably 120 μm or more and 300 μm or less.

[0038] In addition, in the carbon dioxide foaming composition of the present invention, the median diameter of the particle (A) is equal to or larger than the median diameter of the carbonate particle (a), and the median diameter of the particle (B) is equal to or larger than the median diameter of the organic acid particle (b). When the median diameter of the carbonate particle (a) is within the range of the median diameter of the particle (A), the carbonate particle (a) can be used as the particle (A) as it is. Similarly, when the median diameter of the organic acid particle (b) is within the range of the median diameter of the particle (B), the organic acid particle (b) can be used as the particle (B) as it is. In addition, when the median diameter of the particle (A) is made larger than the median diameter of the carbonate particle (a), for example, the size can be adjusted by granulation described later. Similarly, when the median diameter of the particle (B) is made larger than the median diameter of the organic acid particle (b), the size can also be adjusted by granulation described later.

[0039] <Granulated particles> In the present invention, from the viewpoint of high storage stability, suppression of roughness in touch, and good usability, the median diameter of the particles (A) containing a carbonate is preferably made larger than the median diameter of the carbonate particles (a) which are the raw materials, by granulating the carbonate particles (a). Also, from the viewpoint of high storage stability, suppression of roughness in touch, and good usability, the median diameter of the particles (B) containing an organic acid is preferably made larger than the median diameter of the organic acid particles (b) which are the raw materials, by granulating the organic acid particles (b).

[0040] When the particles (A) containing a carbonate are granulated particles, the particles (A) may be granulated particles granulated from the carbonate particles (a) alone, but from the viewpoint of suppressing the amount of fine powder, it is preferably granulated with at least one selected from the group consisting of components other than organic acids, such as excipients, water-soluble polymers (binders, feel modifiers), and humectants, and particularly preferably granulated with all components other than organic acids. When the particles (B) containing an organic acid are granulated particles, the particles (B) may be granulated particles granulated from the organic acid particles (b) alone, but from the viewpoint of suppressing the amount of fine powder, it is preferably granulated with at least one selected from the group consisting of components other than carbonates, such as excipients, water-soluble polymers (binders, feel modifiers), and humectants, and particularly preferably granulated with all components other than carbonates. Moreover, it is preferable that the particles (A) containing a carbonate or the particles (B) containing an organic acid are granulated particles further containing the humectant. By granulating the humectant together, the amount of fine powder derived from the humectant can be suppressed, and choking due to scattering of the fine powder during use of the carbon dioxide foaming composition can be prevented.

[0041] From the viewpoint of improving storage stability and providing good usability, it is preferable that at least one of the particles (A) containing a carbonate and the particles (B) containing an organic acid contains granulated particles obtained by granulating raw material particles. In addition, from the viewpoint of improving storage stability and providing a good usability, it is preferable that the particles having a median diameter of 80 μm or more in the carbon dioxide foaming composition include granulated particles obtained by granulating raw material particles. Here, the "raw material particles" refer to at least one of the carbonate particles (a) and the organic acid particles (b). The "granulated particles obtained by granulating the raw material particles" refer to particles (A) when the carbonate particles (a) are granulated, particles (B) when the organic acid particles (b) are granulated, and particles (A) and particles (B) when the carbonate particles (a) and the organic acid particles (b) are each granulated. In addition, from the viewpoint of improving storage stability and providing a good usability, it is preferable that both the particles (A) containing carbonate and the particles (B) containing organic acid are each granulated. However, from the viewpoint of productivity, it is preferable that only one of the particles (A) or the particles (B) is a granulated particle and the other is used as the raw material particle as it is. From the viewpoint of production efficiency, it is preferable that the particles (B) containing organic acid are used as the granulated particles and the particles (A) containing carbonate are used as the carbonate particles (a) which are the raw material particles as they are.

[0042] In addition, from the viewpoint of suppressing the amount of fine powder, it is preferable that at least one of the particles (A) and the particles (B) is granulated with one or more components selected from the group consisting of components other than the carbonate particles (a) and the organic acid particles (b), for example, excipients, water-soluble polymers (binders, feel modifiers), and hygroscopic agents. In particular, it is preferable that all components other than the carbonate particles (a) and the organic acid particles (b) are granulated. Further, from the viewpoint of further improving storage stability and improving instant solubility, it is preferable that both the particles (A) and the particles (B) are granulated. From the viewpoint of improving productivity, it is preferable that either one of the particles (A) or the particles (B) is granulated.

[0043] Further, it is preferable that the particle (A) or the particle (B) contains an excipient, or it is preferable that both the particle (A) and the particle (B) contain an excipient. Specifically, the carbon dioxide foaming composition of the present invention may contain carbonate particles (a) and particles (B) containing an organic acid and an excipient, may contain particles (A) containing a carbonate and an excipient and organic acid particles (b), or may contain particles (A) containing a carbonate and an excipient and particles (B) containing an organic acid and an excipient.

[0044] In the total particles constituting the carbon dioxide foaming composition of the present invention, the content of fine powder having a size of 10 μm or less is preferably 3.5% by mass or less, more preferably 3.3% by mass or less, and still more preferably 3.0% by mass or less from the viewpoint of improving the usability, particularly preventing choking. From the viewpoint of productivity, it is preferably 0.001% by mass or more, more preferably 0.002% by mass or more, and still more preferably 0.003% by mass or more. And, in the total particles constituting the carbon dioxide foaming composition, the content of fine powder having a size of 10 μm or less is preferably 0.001% by mass or more and 3.5% by mass or less, more preferably 0.002% by mass or more and 3.3% by mass or less, and still more preferably 0.003% by mass or more and 3.0% by mass or less.

[0045] <Granulation method> As the granulation method for the particle (A) or the particle (B), any of a fluidized bed granulation method, a stirring granulation method, a rolling granulation method, or an extrusion granulation method can be used. Among the above, the fluidized bed granulation method is preferable from the viewpoint of improving the solubility of the carbon dioxide foaming composition in a liquid (water). Specifically, for example, when granulating the particle (A), raw materials other than the organic acid are charged into a fluidized bed granulator, and a binder solution in which a binder is dissolved in water, ethanol, or a mixture thereof is added to the uniformly mixed powder particles to perform granulation. Similarly, when granulating the particle (B), raw materials other than the carbonate are charged into a fluidized bed granulator, and a binder solution in which a binder is dissolved in water, ethanol, or a mixture thereof is added to the uniformly mixed powder particles to perform granulation. When granulating in the present invention, the binder used is preferably selected from among the above-mentioned water-soluble polymers. From the viewpoints of the immediate solubility and productivity of the carbon dioxide foaming composition, one or more selected from hydroxyethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, xanthan gum, carrageenan, guar gum, etc. can be used, and it is preferable to use one or more selected from hydroxyethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, xanthan gum, and carrageenan. Also, the content (solid content) of the binder in the binder solution is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more from the viewpoint of productivity, and is preferably 10% by mass or less, more preferably 8% by mass or less, still more preferably 5% by mass or less. And the content of the binder in the binder solution is preferably 0.1 to 10% by mass, more preferably 0.3 to 8% by mass, still more preferably 0.5 to 5% by mass. Furthermore, the content (solid content) of the binder in the carbon dioxide foaming composition 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 from the viewpoint of immediate solubility, and is preferably 10% by mass or less, more preferably 5% by mass or less, still more preferably 3% by mass or less. And the content of the binder in the carbon dioxide foaming composition is preferably 0.01 to 10% by mass, more preferably 0.05 to 5% by mass, still more preferably 0.1 to 3% by mass.

[0046] <Method for producing carbon dioxide foaming composition> The method for producing the carbon dioxide foaming composition of the present invention uses carbonate particles (a) having a median diameter of 170 μm or less and organic acid particles (b) having a median diameter of 500 μm or less as raw materials, and granulates at least one of the carbonate particles (a) and the organic acid particles (b) to create granulated particles having a median diameter of 80 μm or more (hereinafter, also referred to as the "granulated particle creation step"). By using carbonate particles (a) with a median diameter of 170 μm or less and organic acid particles (b) with a median diameter of 500 μm or less as raw material particles, and granulating at least one of them to be 80 μm or more, it becomes possible to improve the storage stability, and at the same time, it is possible to produce a carbonated foaming composition that is excellent in solubility, suppresses the roughness of the touch, and has a good usability. Regarding the granulated particle preparation step, it can be carried out by the granulation method described above. Granulating at least one of the carbonate particles (a) and the organic acid particles (b) includes the case where both the carbonate particles (a) and the organic acid particles (b) are granulated separately, and the case where only one of the carbonate particles (a) and the organic acid particles (b) is granulated. Specifically, one of the carbonate particles (a) or the organic acid particles (b) may be used as raw material particles without granulation, or the carbonate particles (a) and the organic acid particles (b) may be granulated respectively and used as granulated particles (A) of carbonate and granulated particles (B) of organic acid. From the viewpoint of improving the storage stability and the immediate solubility, it is preferable that both the carbonate particles (a) and the organic acid particles (b) are granulated separately, and from the viewpoint of improving the productivity, it is preferable to granulate only one of the carbonate particles (a) and the organic acid particles (b). After the granulated particle preparation step, when the carbonate particles (a) and the organic acid particles (b) are granulated separately, then, the granulated particles (particles (A) and particles (B)) are mixed, and when only one of the carbonate particles (a) and the organic acid particles (b) is granulated, the granulated particle and the non - granulated particle are mixed by known means to produce a carbonated foaming composition.

[0047] <Method of using the carbonated foaming composition> The carbonated foaming composition of the present invention is used to make the surfactant - containing composition into a foamy dosage form by contacting it with the surfactant - containing composition during use. More specifically, the carbonated foaming composition of the present invention can be brought into contact with a surfactant-containing composition during use, and the liquid component (water) contained in the surfactant-containing composition or the liquid component (water) added as necessary causes the carbonate and organic acid contained in the carbonated foaming composition to react to generate carbon dioxide gas, thereby making it possible to form the surfactant-containing composition into a foamy dosage form. Since the carbonated foaming composition of the present invention reacts with water and natural foaming starts, the foaming of the surfactant-containing composition is also fast, and there is no need for a special foaming operation that requires time and labor, so it can be easily used.

[0048] In addition, the method of using the carbonated foaming composition of the present invention is also a foaming method and a cleaning method. That is, it is also a foaming method of a surfactant composition in which the carbonated foaming composition of the present invention is brought into contact with a surfactant-containing composition to form the surfactant-containing composition into a foamy dosage form. In addition, the carbonated foaming composition of the present invention is brought into contact with a surfactant-containing composition to form the surfactant-containing composition into a foamy dosage form, and the foamy surfactant composition is applied to the surface of the human body and washed, which is also a method for washing the body. In addition, the carbonated foaming composition of the present invention is brought into contact with a surfactant-containing composition to form the surfactant-containing composition into a foamy dosage form, and the foamy surfactant composition is applied to the hair and washed, which is also a method for washing the hair.

[0049] In this specification, the surfactant-containing composition is not particularly limited as long as it is a composition containing a surfactant that is applied to the surface of the human body including the skin and hair. For example, hair cosmetics, facial cleansers, body cleansers (body shampoos), etc. can be mentioned. Examples of hair cosmetics include shampoos, rinses, conditioning agents, treatment agents, styling agents, hair dyes, hair growth agents, etc. Among the above, from the viewpoint of being able to more effectively exhibit the effects of the present invention, the surfactant-containing composition is preferably a hair cosmetic, more preferably one selected from the group consisting of shampoos, rinses, conditioning agents, and treatment agents, and even more preferably a shampoo. Further, from the viewpoint that the surfactant-containing composition can more effectively exhibit the effects of the present invention, it is preferably in a liquid state.

[0050] When a hair cosmetic is directly applied to the hair, friction may occur between the hair and the scalp during foaming or when making it conform to the hair, which may impose a burden on the hair and the scalp. However, by using the carbon dioxide foaming composition of the present invention in combination, it becomes possible to apply it as a foamy hair cosmetic, so that the burden on the hair and the scalp can be reduced. In addition, since the carbon dioxide foaming composition of the present invention is excellent in instant solubility, it also has an excellent feel in use such as texture (touch) even when dissolved in a hair cosmetic. Furthermore, the carbon dioxide foaming composition of the present invention can be used in combination with hair cosmetics such as commercially available shampoos and conditioning agents, and does not require special containers or tools for the foaming operation, so it has excellent versatility. In particular, when it is enclosed in a packaging material for each single use, it can be easily carried, so it can also be used outside. In addition, a blood circulation promoting effect by carbon dioxide gas can also be expected.

[0051] More specifically, as a method of using the carbon dioxide foaming composition of the present invention, for example, take the carbon dioxide foaming composition in the palm of the hand, add a surfactant-containing composition to the carbon dioxide foaming composition, thoroughly mix the surfactant-containing composition into the carbon dioxide foaming composition on the palm, naturally foam it, then gently foam it, and apply it to the face, hair, whole body, etc. to be applied. Note that the order of placing it on the palm does not matter. After taking the surfactant-containing composition in the palm of the hand, the carbon dioxide foaming composition may be added to the surfactant-containing composition. However, from the viewpoint of reducing the scattering of the carbon dioxide foaming composition and more effectively foaming the surfactant-containing composition, it is preferable to first take the carbon dioxide foaming composition in the palm of the hand and then add the surfactant-containing composition.

[0052] Also, when the foaming of the surfactant-containing composition is difficult to proceed, water may be further added as necessary. In this case, the timing of adding water is not particularly limited. For example, after contacting the carbonated foaming composition with water, the surfactant-containing composition may be added, or after contacting the surfactant-containing composition with water, the carbonated foaming composition may be added. Also, after contacting the carbonated foaming composition with the surfactant-containing composition, water may be added. From the viewpoint of more effectively foaming the surfactant-containing composition, it is preferable to add the surfactant composition after contacting the carbonated foaming composition with water. However, from the viewpoint of improving the usability, it is preferable to use it without adding water.

[0053] When the surfactant-containing composition is in a liquid state, the amount of the liquid surfactant-containing composition added to the carbonated foaming composition, from the viewpoints of improving the solubility of the carbonated foaming composition and also improving the foaming property, the mass ratio of the carbonated foaming composition to the added surfactant-containing composition (carbonated foaming composition / surfactant-containing composition) is preferably 1 / 30 or more, more preferably 1 / 25 or more, still more preferably 1 / 20 or more, and preferably 1 / 0.5 or less, more preferably 1 / 1 or less, still more preferably 1 / 2 or less. And the mass ratio (carbonated foaming composition / surfactant-containing composition) is preferably 1 / 30 or more and 1 / 0.5 or less, more preferably 1 / 25 or more and 1 / 1 or less, still more preferably 1 / 20 or more and 1 / 2 or less. Also, the amount of water added as necessary, from the viewpoints of solubility and foaming property, is preferably 0.1 g or more and 20 g or less, more preferably 0.5 g or more and 15 g or less, still more preferably 1 g or more and 10 g or less per 1 g of the carbonated foaming composition. The temperature of the water added to the carbonated foaming composition as necessary is not particularly limited, but is preferably 15°C or more and 50°C or less, more preferably 15°C or more and 45°C or less, still more preferably 20°C or more and 45°C or less.

[0054] When the surfactant-containing composition is in a liquid state, from the viewpoint of foam retention, after the carbonated foam composition of the present invention comes into contact with the liquid surfactant-containing composition (when the carbonated foam composition is first brought into contact with water, after the carbonated foam composition and water come into contact), it is preferably applied to the application target such as hair within 5 minutes, more preferably within 3 minutes, even more preferably within 2 minutes, and even more preferably within 1 minute and 30 seconds. The carbonated foam composition of the present invention can be suitably used as a foaming aid that helps to foam surfactant-containing compositions, particularly hair cosmetics such as shampoos and conditioning agents.

[0055] The carbonated foam composition of the present invention can be enclosed in a packaging material and provided. Since the carbonated foam composition of the present invention is less likely to cause the packaging material to swell due to the generation of carbon dioxide gas even when stored enclosed in a packaging material, it has excellent storage stability in the product form enclosed in a packaging material. The shape of the packaging material is not particularly limited as long as it has a structure capable of enclosing the carbonated foam composition, and examples include a bag shape, a bottle shape, etc. Among these, a bag-shaped packaging material is preferred. The material constituting the packaging material is also not particularly limited as long as it can enclose the carbonated foam composition. For example, in the case of a bag-shaped packaging material, a resin film, or a laminated film in which an inorganic thin film made of a metal or a metal oxide is laminated on a resin film can be used.

[0056] <Hair cosmetic kit> The hair cosmetic kit of the present invention includes a carbonated foam composition and a surfactant-containing composition. The carbonated foam composition and the surfactant-containing composition used in the hair cosmetic kit of the present invention are the same as those described above. When using the hair cosmetic kit, the carbonated foam composition and the surfactant-containing composition are brought into contact with each other to make the surfactant-containing composition into a foamy dosage form and then used.

[0057] Hereinafter, regarding the above-described embodiments, the present invention further discloses the following. <1> A carbonated foam composition containing a carbonate and an organic acid, The carbonate foaming composition contains particles (A) containing the carbonate and particles (B) containing the organic acid, the particles (A) do not contain an organic acid, and the particles (B) are particles that do not contain a carbonate, the median diameter of the carbonate particles (a) which are the raw materials of the particles (A) is 170 μm or less, and the median diameter of the organic acid particles (b) which are the raw materials of the particles (B) is 500 μm or less, the median diameter of at least one of the particles (A) and the particles (B) is 80 μm or more, the median diameter of the particles (A) is equal to or greater than the median diameter of the carbonate particles (a), and the median diameter of the particles (B) is equal to or greater than the median diameter of the organic acid particles (b), Carbonate foaming composition. <2> The carbonate foaming composition according to <1>, wherein at least one of the particles (A) and the particles (B) contains granulated particles obtained by granulating raw material particles. <3> Furthermore, the carbonate foaming composition according to <1> or <2>, which contains a moisture absorbent. <4> The carbonate foaming composition according to any one of <1> to <3>, wherein the organic acid contains one or more selected from the group consisting of citric acid, succinic acid, tartaric acid, and ascorbic acid. <5> The carbonate foaming composition according to any one of <1> to <4>, wherein the carbonate contains one or more selected from the group consisting of sodium carbonate and sodium hydrogen carbonate. <6> The carbonate foaming composition according to any one of <3> to <5>, wherein the moisture absorbent is magnesium oxide. <7> The carbonate foaming composition according to any one of <3> to <6>, wherein the particles (A) or the particles (B) are granulated particles further containing the moisture absorbent. <8> The carbonate foaming composition according to any one of <1> to <7>, wherein the particles (A) are granulated particles further containing an excipient. <9> The carbon dioxide foaming composition according to any one of <1> to <7>, wherein the particle (B) is a granulated particle further containing an excipient. <10> The carbon dioxide foaming composition according to any one of <1> to <7>, wherein both the particle (A) and the particle (B) are granulated particles further containing an excipient. <11> A method for producing the carbon dioxide foaming composition according to any one of <1> to <10>, using carbonate particles (a) having a median diameter of 170 μm or less and organic acid particles (b) having a median diameter of 500 μm or less as raw materials, and granulating at least one of the carbonate particles (a) and the organic acid particles (b) to produce granulated particles having a median diameter of 80 μm or more. A method for producing a carbon dioxide foaming composition. <12> The method for producing the carbon dioxide foaming composition according to any one of <1> to <10> or the carbon dioxide foaming composition according to <11>, wherein the median diameter of the particle (a) is 10 μm or more and 150 μm or less, and the median diameter of the particle (b) is 10 μm or more and 350 μm or less. <13> The method for producing the carbon dioxide foaming composition according to any one of <1> to <10> or the carbon dioxide foaming composition according to <11> or <12>, wherein the median diameter of at least one of the particles (A) and the particles (B) is 90 μm or more. <14> The method for producing the carbon dioxide foaming composition according to any one of <2> to <10> or the carbon dioxide foaming composition according to any one of <11> to <13>, wherein the median diameter of the granulated particles is 110 μm or more and 350 μm or less. <15> The method for producing the carbon dioxide foaming composition according to any one of <1> to <10> or the carbon dioxide foaming composition according to any one of <11> to <14>, wherein the content of the carbonate in the carbon dioxide foaming composition is 15% by mass or more and 65% by mass or less. <16> The method for producing the carbonated foam composition according to any one of <1> to <10> or the method for producing the carbonated foam composition according to any one of <11> to <15>, wherein the content of the organic acid in the carbonated foam composition is 5% by mass or more and 60% by mass or less. <17> The method for producing the carbonated foam composition according to any one of <1> to <10> or the method for producing the carbonated foam composition according to any one of <11> to <16>, wherein the mass ratio of the organic acid to the carbonate [organic acid / carbonate] is 0.05 or more and 10 or less. <18> The method for producing the carbonated foam composition according to any one of <1> to <10> or the method for producing the carbonated foam composition according to any one of <11> to <17>, wherein the total amount of the carbonate and the organic acid in the carbonated foam composition is 50 to 90% by mass. <19> The method for producing the carbonated foam composition according to any one of <3> to <10> or the method for producing the carbonated foam composition according to any one of <11> to <18>, wherein the content of the moisture absorbent in the carbonated foam composition is 0.01 to 15% by mass. <20> The method for producing the carbonated foam composition according to any one of <1> to <10> or the method for producing the carbonated foam composition according to any one of <11> to <19>, wherein the coefficient of variation CV value represented by the following formula (1) of the particles (a) and the particles (b) is 95% or less. Coefficient of variation CV value (%) = [standard deviation σ of particle diameter] / [median diameter D] × 100 (Formula 1) <21> The method for producing the carbonated foam composition according to any one of <1> to <10> or the method for producing the carbonated foam composition according to any one of <11> to <20>, wherein the content of particles of 10 μm or less among all the particles constituting the carbonated foam composition is 0.001% by mass or more and 3.5% by mass or less.

Examples

[0058] Hereinafter, the present invention will be described by way of examples, but the present invention is not limited to the scope of the examples. The measurements in this example were carried out by the following methods.

[0059] [Measurement method of median diameter and CV value] Regarding the particle sizes of the carbonate particles (a), organic acid particles (b), particles (A), and particles (B), 3 g of each was used, and the median diameter and CV value were measured using a Comsize XT (particle size measuring device, manufactured by RETSCH Co., Ltd.). For particles (A) and particles (B), measurements were made only after granulation when they were in the form of granulated products.

[0060] [Example 1] According to the formulation shown in Table 1, a carbonated foam composition was obtained. 158.6 g of citric acid (citric anhydride 60 manufactured by Iwata Chemical Industry Co., Ltd.), 39.5 g of magnesium oxide (manufactured by Kyowa Chemical Industry Co., Ltd.), 84.7 g of talc (SW-K4 manufactured by Asada Flour Milling Co., Ltd.), and 16.3 g of cationized hydroxyethyl cellulose (Softcat Polymer SL-30 manufactured by The Dow Chemical Company) were charged into a fluidized bed granulator (FD-MP-01E manufactured by Powrex Corporation), and granulation was carried out while adding 90 g (solid content 0.9 g) of a 1.0% carboxymethyl cellulose (manufactured by Nippon Paper Industries Co., Ltd., Sunrose, hereinafter also referred to as CMC) aqueous solution at a rate of 4 g / min under the conditions of an air volume of 0.2 m 3 / min and an intake air temperature of 80°C to obtain a granulated product with a median diameter of 175 μm. The obtained granulated product and 264.3 g of sodium hydrogen carbonate (hereinafter also referred to as baking soda, manufactured by AGC Inc.) were put into a bag and manually mixed in a transparent vinyl bag until uniform to prepare a carbonated foam composition. Using the obtained carbonated foam composition, each evaluation was carried out according to the method shown below. The results are shown in Table 1.

[0061] [Examples 2 and 3] A carbonated foam composition was obtained in the same manner as in Example 1 except that the formulation shown in Table 1 was followed. Using the obtained carbonated foam composition, each evaluation was carried out according to the method shown below. The results are shown in Table 1.

[0062] [Example 4] According to the formulation shown in Table 1, sodium bicarbonate was granulated. 195.3 g of sodium bicarbonate (manufactured by AGC Inc.), 29.2 g of magnesium oxide (manufactured by Kyowa Chemical Industry Co., Ltd.), 62.6 g of talc (SW-K4 manufactured by Asada Flour Milling Co., Ltd.), and 12.0 g of cationized hydroxyethyl cellulose (Softcat Polymer SL-30 manufactured by The Dow Chemical Company) were charged into a fluidized bed granulator (FD-MP-01E manufactured by Powrex Corporation), and granulated under the same conditions as in Example 1 while adding 66 g of a 1.0% CMC aqueous solution (solid content 0.7 g) at a rate of 4 g / min to obtain granules with a median diameter of 145 μm. The obtained granules and 117.2 g of citric acid (citric anhydride 60 manufactured by Iwata Chemical Industry Co., Ltd.) were manually mixed in a transparent vinyl bag until uniform to prepare a carbon dioxide foaming composition. Using the obtained carbon dioxide foaming composition, each evaluation was conducted according to the method shown below. The results are shown in Table 1.

[0063] [Example 5] A carbon dioxide foaming composition was obtained in the same manner as in Example 1, except that citric acid (citric acid fine powder manufactured by Iwata Chemical Industry Co., Ltd.) was used. Using the obtained carbon dioxide foaming composition, each evaluation was conducted according to the method shown below. The results are shown in Table 1.

[0064] [Example 6] A carbon dioxide foaming composition was obtained in the same manner as in Example 1, except that 142.9 g of citric acid (citric anhydride 60 manufactured by Iwata Chemical Industry Co., Ltd.), 37.6 g of magnesium oxide (manufactured by Kyowa Chemical Industry Co., Ltd.), 75.8 g of talc (SW-K4 manufactured by Asada Flour Milling Co., Ltd.), 15.6 g of cationized hydroxyethyl cellulose (Softcat Polymer SL-30 manufactured by The Dow Chemical Company), and 26.9 g of sodium cocoamphoacetate (JODAPON LACI manufactured by BASF) were used. Using the obtained carbon dioxide foaming composition, each evaluation was conducted according to the method shown below. The results are shown in Table 1.

[0065] [Comparative Examples 1 to 3] A carbon dioxide foaming composition was obtained according to the formulation shown in Table 2. In Comparative Examples 1 to 3, without granulation, all the components were put into a bag and hand-mixed in a transparent plastic bag until uniform to obtain a carbonated foaming composition. Using the obtained carbonated foaming composition, each evaluation was carried out according to the method shown below. The results are shown in Table 2.

[0066] [Foaming property (without water addition)] Take 1 g of each carbonated foaming composition on the palm, add 6 g of a commercially available shampoo liquid (Kao Corporation, Essential Beauty) to the carbonated foaming composition, thoroughly mix the shampoo liquid with the carbonated foaming composition on the palm, and after natural foaming (about 10 seconds after adding the shampoo liquid), mix with the other finger to foam. Then, while continuing the foaming operation, three professional panels evaluated the foaming property when foaming within 3 minutes after adding the shampoo liquid according to the following criteria, and it was determined by the agreement of the professional panels. 1: Foams up to the full palm in less than 30 seconds 2: Foams up to the full palm in 30 seconds or more and less than 1 minute 3: Foams up to the full palm in 1 minute or more and less than 2 minutes 4: Foams up to the full palm in 2 minutes or more and less than 3 minutes 5: Takes 3 minutes or more to foam up to the full palm [Foaming property (with water addition)] Take 1 g of each carbonated foaming composition on the palm, add 5 g of water at 42°C to the carbonated foaming composition, thoroughly mix the water with the carbonated foaming composition on the palm, and after natural foaming (about 10 seconds after adding the water), add 6 g of a commercially available shampoo liquid (Kao Corporation, Essential Beauty), thoroughly mix the shampoo liquid with the carbonated foaming composition on the palm, and after natural foaming, mix with the other finger to foam. Then, while continuing the foaming operation, three professional panels evaluated the foaming property when foaming within 3 minutes after adding the water according to the following criteria, and it was determined by the agreement of the professional panels. 1: Foams up to the full palm in less than 30 seconds 2: Foams up to the full palm in 30 seconds or more and less than 1 minute 3: Foam up to fill the palm in more than 1 minute and less than 2 minutes 4: Foam up to fill the palm in more than 2 minutes and less than 3 minutes 5: It takes more than 3 minutes to foam up to fill the palm

[0067] [Storage stability] 3.9 g of each carbonated foaming composition was sealed in an aluminum packaging material of 80 mm × 50 mm × 18 mm under 50 °C and 50% RH, and the expansion amount of the aluminum packaging material before and after storage at 50 °C for 4 weeks was measured. Specifically, a water tank filled with water at 25 °C was placed on a scale and its weight was measured. Next, the aluminum packaging material containing the carbonated foaming composition was completely submerged in the water tank, and its mass was measured. The difference in mass before and after submerging the aluminum packaging material in water was converted into volume with the density of water being 1.0 g / ml according to Archimedes' principle, and this was taken as the volume of the aluminum packaging material before storage. Then, by performing the same measurement after 4 weeks of storage, the volume of the aluminum packaging material after storage was obtained, and the expansion amount of the aluminum packaging material after storage was obtained from the difference in volume of the aluminum packaging material before and after storage. A smaller expansion amount indicates better storage stability.

[0068] [Feeling in use (touch without adding water)] 1 g of each carbonated foaming composition was taken in the palm, 6 g of a commercially available shampoo liquid (Kao Corporation, Essential Beauty) was added to the carbonated foaming composition, the shampoo liquid was well mixed with the carbonated foaming composition on the palm, and after natural foaming, it was mixed and whipped with the other finger. Then, while continuing the whipping operation, three professional panels evaluated the touch when whipping within 3 minutes after adding the shampoo liquid to the carbonated foaming composition according to the following criteria, and it was determined by the agreement of the professional panels. 1: Do not feel roughness from the beginning 2: Feel roughness at first, but it disappears at the initial stage of foaming 3: Feel roughness at first, but it disappears during foaming 4: Feel roughness, but it disappears after foaming 5: Feel roughness and it does not disappear after foaming ("The initial foaming" refers to within 1 minute after adding the shampoo liquid to the carbonated foaming composition, "during foaming" refers to more than 1 minute and within 2 minutes, and "after foaming" refers to more than 2 minutes and within 3 minutes.)

[0069] [Feeling during use (touch / water added)] Take 1 g of each carbonated foaming composition on the palm, add 5 g of water at 42°C to the carbonated foaming composition, thoroughly mix the water with the carbonated foaming composition on the palm, and let it foam naturally. After that (about 10 seconds after adding the water), add 6 g of a commercially available shampoo liquid (Kao Corporation, Essential Beauty) to the carbonated foaming composition on the palm, thoroughly mix the shampoo liquid with the carbonated foaming composition on the palm, and let it foam naturally. Then, mix and foam it with the other finger. After that, while continuing the foaming operation, three professional panels evaluated the touch when foaming within 3 minutes after adding the water according to the following criteria, and it was determined by the agreement of the professional panels. 1: Does not feel rough from the beginning 2: Feels rough at first, but disappears at the initial foaming stage 3: Feels rough at first, but disappears during foaming 4: Feels rough, but disappears after foaming 5: Feels rough and does not disappear after foaming ("The initial foaming" refers to within 1 minute after adding water to the carbonated foaming composition, "during foaming" refers to more than 1 minute and within 2 minutes, and "after foaming" refers to more than 2 minutes and within 3 minutes.)

[0070]

Table 1

[0071]

Table 2

[0072] *1 In the column of "Granulation state" in Table 1 and Table 2, "organic acid granulation" means that an organic acid and all components other than carbonates (excipients, water-soluble polymers, and humectants) are granulated, and the granulated particles correspond to the particles (B) containing the organic acid of the present invention. In the case of organic acid granulation, the carbonate (sodium bicarbonate) is used as raw material particles that have not been granulated (corresponding to the particles (A) containing carbonate). "Carbonate granulation" means that a carbonate and all components other than organic acids (excipients, water-soluble polymers, and humectants) are granulated, and the granulated particles correspond to the particles (A) containing the carbonate of the present invention. In the case of carbonate granulation, the organic acid (citric acid) is used as raw material particles that have not been granulated (corresponding to the particles (B) containing an organic acid). "Ungranulated" refers to the state in which all powder components are used without granulation. *2 Softcat Polymer SL-30 manufactured by The Dow Chemical Company *3 Sunrose, manufactured by Nippon Paper Industries Co., Ltd.

[0073] From Table 1 and Table 2, it can be seen that the carbonated foaming composition of this example is excellent in storage stability and touch. In addition, all the shampoos to which the carbonated foaming composition of this example was applied had good foaming properties, foam breakage, and foam retention.

Industrial Applicability

[0074] According to the present invention, it is possible to provide a carbonated foaming composition having high storage stability, suppressed roughness of touch, and good usability. By combining the carbonated foaming composition with hair cosmetics such as shampoos and conditioning agents, the hair cosmetics can be made into a foamy dosage form.

Claims

1. A carbonated foaming composition containing a carbonate salt and an organic acid, The carbonated foamable composition contains particles (A) containing the carbonate and particles (B) containing the organic acid, The particles (A) do not contain an organic acid, and the particles (B) do not contain a carbonate, the median diameter of the carbonate particles (a) which are the raw material of the particles (A) is 170 μm or less, and the median diameter of the organic acid particles (b) which are the raw material of the particles (B) is 500 μm or less; At least one of the particles (A) and the particles (B) has a median diameter of 80 μm or more; the median diameter of the particles (A) is equal to or larger than the median diameter of the carbonate particles (a), and the median diameter of the particles (B) is equal to or larger than the median diameter of the organic acid particles (b); Carbonated foaming composition.

2. The carbonic acid foaming composition according to claim 1 , wherein at least one of the particles (A) and the particles (B) comprises agglomerated particles obtained by agglomerating raw material particles.

3. The carbonic acid foaming composition according to claim 1 , further comprising a moisture absorbent.

4. The carbonic acid foaming composition according to claim 1, wherein the organic acid contains one or more selected from the group consisting of citric acid, succinic acid, tartaric acid, and ascorbic acid.

5. The carbonated foamable composition according to claim 1 , wherein the carbonate salt contains at least one selected from the group consisting of sodium carbonate and sodium bicarbonate.

6. The carbonic acid foaming composition according to claim 3, wherein the moisture absorbent is magnesium oxide.

7. The carbonic acid foaming composition according to claim 3 , wherein the particles (A) or the particles (B) are granulated particles further containing the moisture absorbent.

8. Further comprising an excipient, The cleaning composition of claim 7 , wherein the particles (A) or the particles (B), or both the particles (A) and the particles (B), contain the excipient.

9. A method for producing the carbonic acid foaming composition according to any one of claims 1 to 8, The method includes a step of using carbonate particles (a) having a median diameter of 170 μm or less and organic acid particles (b) having a median diameter of 500 μm or less as raw materials, and granulating at least one of the carbonate particles (a) and the organic acid particles (b) to prepare granulated particles having a median diameter of 80 μm or more. A method for producing a carbonated foaming composition.

10. A method for using a carbonated foaming composition, comprising contacting the carbonated foaming composition according to any one of claims 1 to 8 with a surfactant-containing composition to form the surfactant-containing composition into a foam-like formulation.

11. The method for using the carbonic acid foaming composition according to claim 10, wherein the surfactant-containing composition is a hair cosmetic.

12. A hair cosmetic kit comprising the carbonated foamable composition according to any one of claims 1 to 8 and a surfactant-containing composition.

Images