Foaming agent composition

Abstract

The present invention relates to: a foaming agent composition having excellent foamability, storage stability, and feeling of use; and a method for generating carbon dioxide using the foaming agent composition.　Provided are a foaming agent composition and a method for generating carbon dioxide by mixing the foaming agent composition with water. The foaming agent composition contains an agent A containing carbonate particles, an agent B containing C2-6 organic acid particles, and a nonaqueous solvent, wherein the nonaqueous solvent has a relative permittivity of 10 or less at 25°C, at least one among the agent A and the agent B contains a coating material having a dissolution amount of at least 5 g in 100 g of water, and the surface of at least one among the carbonate particles and the organic acid particles is at least partially coated with the coating material.

Description

Foaming agent composition

[0001] The present invention relates to a blowing agent composition and a method for generating carbon dioxide.

[0002] Cosmetics such as beauty serums and bath additives are known to foam using carbon dioxide or the like to improve blood circulation and cleansing effects. Conventionally, carbon dioxide-generating agents have been known that combine a carbonate with an acidic component such as an organic acid. These agents are mixed with water at the time of use to generate carbon dioxide. For example, Japanese Patent Laid-Open Publication No. 2016-117659 (Patent Document 1) discloses a novel bath additive comprising at least a foaming component (4) and a liquid substance (1) that is liquid at room temperature, wherein the liquid substance (1) is one or more selected from an oil component (2) and a surfactant (3), the foaming component (4) is at least an organic acid (5) and a carbonate (6), the liquid substance (1) and the foaming component (4) are blended together to form a sherbet-like state, and the foaming component (4) is prevented from reacting with water in the liquid substance (1) until use.

[0003] The present invention relates to the following [1] and [2]: [1] A blowing agent composition comprising a component A containing carbonate particles, a component B containing organic acid particles having from 2 to 6 carbon atoms, and a non-aqueous solvent, wherein the non-aqueous solvent has a relative dielectric constant of 10 or less at 25°C, at least one of the components A and B contains a coating material having a solubility of 5 g or more in 100 g of water, and at least one of the carbonate particles and the organic acid particles is coated on at least a portion of its surface with the coating material. [2] A method for generating carbon dioxide, comprising mixing the blowing agent composition according to [1] above with water.

[0004] The novel bath agent disclosed in JP 2016-117659 A (Patent Document 1) contains an acidic substance and a carbon dioxide gas generating substance that reacts with the acidic substance to generate carbon dioxide gas within the same agent, but is unsatisfactory in terms of foaming ability, storage stability, and usability due to the amount of carbon dioxide generated. The present invention relates to a foaming agent composition that is excellent in foaming ability, storage stability, and usability, and a method for generating carbon dioxide using the foaming agent composition.

[0005] The present inventors have found that the above-mentioned problems can be solved by a blowing agent composition comprising: a component A containing carbonate particles; a component B containing organic acid particles; and a non-aqueous solvent having a specific dielectric constant, wherein at least one of the components A and B contains a coating material having a specific solubility in 100 g of water; and at least one of the carbonate particles and the organic acid particles is at least partially coated with the coating material. The present invention relates to the following [1] and [2]. [1] A blowing agent composition comprising: a component A containing carbonate particles; a component B containing organic acid particles having a carbon number of 2 to 6; and a non-aqueous solvent, wherein the non-aqueous solvent has a dielectric constant of 10 or less at 25°C; at least one of the components A and B contains a coating material having a solubility of 5 g or more in 100 g of water; and at least one of the carbonate particles and the organic acid particles is at least partially coated with the coating material. [2] A method for generating carbon dioxide, comprising mixing the blowing agent composition according to [1] above with water.

[0006] According to the present invention, there are provided a blowing agent composition having excellent foaming properties, storage stability and usability, and a method for generating carbon dioxide using the blowing agent composition.

[0007] [Blowing Agent Composition] The blowing agent composition of the present invention is a blowing agent composition comprising an A component containing carbonate particles (hereinafter also referred to as "carbonate" or "carbonate A"), an B component containing organic acid particles having from 2 to 6 carbon atoms (hereinafter also referred to as "organic acid" or "organic acid B"), and a non-aqueous solvent, wherein the non-aqueous solvent has a relative dielectric constant of 10 or less at 25°C, at least one of the A component and the B component contains a coating material having a solubility of 5 g or more in 100 g of water, and at least one of the carbonate particles and the organic acid particles is coated on at least a portion of its surface with the coating material. It is preferable that a plurality of the A component and the B component are present, and it is also preferable that the A component and the B component are dispersed in the non-aqueous solvent.

[0008] The foaming agent composition of the present invention has excellent foaming properties, storage stability, and usability. The detailed mechanism by which such effects are achieved is unknown, but is partially presumed as follows. The foaming agent composition of the present invention comprises a dispersion of component A containing carbonate particles and component B containing organic acid particles having 2 to 6 carbon atoms in a non-aqueous solvent. The non-aqueous solvent used in the present invention has a relative dielectric constant of 10 or less at 25°C, making the carbonate particles in the foaming agent composition less susceptible to ionization. Furthermore, at least one of the carbonate particles in component A and the organic acid particles in component B is coated with a coating material on at least a portion of its surface, further inhibiting reaction between the two in the non-aqueous solvent. As a result, the foaming agent composition of the present invention can inhibit carbon dioxide generation during storage and has excellent storage stability. Meanwhile, the coating material used in the present invention is characterized by having a solubility of 5 g or more in 100 g of water. Therefore, when the foaming agent composition of the present invention is used in contact with water, the coating material that coats at least one of the carbonate particles in component A and the organic acid particles in component B is quickly dissolved in water and removed, allowing the reaction between the carbonate particles and the organic acid particles to proceed quickly without being hindered. As a result, the foaming agent composition of the present invention is able to generate sufficient carbon dioxide and has excellent foaming properties. Furthermore, as described above, the coating material is quickly removed, allowing the carbonate particles and the organic acid particles to react quickly, thereby reducing the foreign body sensation upon contact with the skin and improving the feel in use. From the above, it is believed that the foaming agent composition of the present invention can achieve both foaming properties and storage stability and can further improve the feel in use.

[0009] In the foaming agent composition of the present invention, it is preferable that at least one of Agent A and Agent B is granulated with a coating material. From the viewpoint of storage stability, it is preferable that Agent A is granulated with a coating material, and from the viewpoint of foaming property, it is preferable that Agent B is granulated with a coating material. By granulating with a coating material, each carbonate particle in Agent A is covered with the coating material and the particles are bonded by the coating material. This makes it difficult for moisture in the air to penetrate to each carbonate particle, thereby improving storage stability. The same applies to the organic acid particles in Agent B. Furthermore, in the present invention, from the viewpoint of improving foaming property, storage stability, and usability, it is preferable that at least one of Agent A and Agent B contains a coating material having a solubility of 5 g or more in 100 g of water, and that at least one of the carbonate particles and the organic acid particles has at least a portion of its surface coated with a coating material. In particular, from the viewpoint of storage stability, it is more preferable that at least the carbonate particles have at least a portion of their surface coated with the coating material.

[0010] In the composition of the present invention, the molar equivalent ratio (carbonate / organic acid) of carbonate particles (carbonate A) in component A to organic acid particles (organic acid B) having from 2 to 6 carbon atoms in component B is preferably 0.5 or more, more preferably 0.8 or more, and preferably 2 or less, more preferably 1.2 or less, from the viewpoints of foaming property and storage stability. The molar equivalent ratio of carbonate A in component A to organic acid B in component B is preferably 0.5 or more and 2 or less, more preferably 0.8 or more and 1.2 or less.

[0011] <Ingredients> [Coating Material] The coating material is used to suppress the reaction between carbonate A and an organic acid (organic acid B) having 2 to 6 carbon atoms in a non-aqueous solvent having a dielectric constant of 10 or less at 25°C, particularly from the viewpoint of improving storage stability (hereinafter also simply referred to as storage stability). The coating material is incompatible with non-aqueous solvents having a dielectric constant of 10 or less at 25°C. From the viewpoints of foamability, storage stability, and usability, the solubility in 100 g of water (25°C, 1013.25 hPa) is 5 g or more, preferably 10 g or more, and more preferably 20 g or more. The solubility may be infinite or may be 10,000 g or less. For measuring the solubility, see, for example, Journal of the Chemical Society of Japan, 1985, No. 11, pp. 2116-2119; ibid., 1982, No. 11, pp. 1830-1834. From the viewpoint of storage stability, the melting point of the coating material is preferably 25°C or higher, more preferably 30°C or higher, and there is no particular upper limit, but it may be 300°C or lower. From the viewpoints of foamability, storage stability, and usability, the coating material is preferably one or more selected from organic compounds and inorganic compounds, more preferably one or more selected from surfactants, polyols, water-soluble polymers, and water-soluble inorganic salts, and even more preferably one or more selected from surfactants, polyols, and water-soluble inorganic salts, and two or more may be used. Note that, from the viewpoint of suppressing the generation of carbon dioxide during storage and improving storage stability, it is preferable that the coating material for agent A (carbonate particles) does not contain an organic acid having 2 to 6 carbon atoms, and that the coating material for agent B (organic acid particles having 2 to 6 carbon atoms) does not contain carbonate. The solubility of the water-soluble polymer and water-soluble inorganic salt in 100 g of water (25°C, 1013.25 hPa) is as described above.

[0012] The molecular weight of the surfactant is preferably 70 or more, more preferably 100 or more, and even more preferably 200 or more from the viewpoints of foaming property, storage stability, and usability, and is preferably 10,000 or less, more preferably 6,000 or less, and even more preferably 1,000 or less from the viewpoints of ease of production and foaming property. Specific examples of surfactants include anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants, and it is preferable to include a nonionic surfactant from the viewpoint of coating component A and component B. These surfactants may be used alone or in combination of two or more types.

[0013] The anionic surfactant is preferably an anionic surfactant having a hydrocarbon group having 12 to 24 carbon atoms, more preferably 12 to 16 carbon atoms, and even more preferably 12 to 14 carbon atoms. Examples of the anionic surfactant include fatty acid salts having 12 to 24 carbon atoms, such as sodium laurate, potassium laurate, and potassium palmitate; polyoxyethylene alkyl ether carboxylates, such as polyoxyethylene tridecyl ether sodium acetate; alkyl phosphates, such as potassium lauryl phosphate, sodium lauryl phosphate, arginine lauryl phosphate, potassium myristyl phosphate, sodium myristyl phosphate, arginine myristyl phosphate, potassium palmityl phosphate, sodium palmityl phosphate, and arginine palmityl phosphate; polyoxyethylene alkyl ether phosphates, such as polyoxyethylene oleyl ether sodium phosphate and polyoxyethylene stearyl ether sodium phosphate; sodium lauryl sulfate, alkyl sulfate salts such as potassium lauryl sulfate; polyoxyethylene alkyl ether sulfate salts such as potassium polyoxyethylene lauryl sulfate, sodium polyoxyethylene lauryl sulfate, and polyoxyethylene lauryl sulfate triethanolamine; acylated amino acid salts such as sodium lauroyl sarcosine, monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, monosodium N-myristoyl-L-glutamate, N-lauroyl glycine triethanolamine, potassium N-coconut oil fatty acid acyl glycine, N-lauroyl-β-alanine triethanolamine, and N-stearoyl-β-alanine triethanolamine; fatty acid amide sulfonates such as sodium N-myristoyl-N-methyl taurate and sodium N-stearoyl-N-methyl taurate; and sulfosuccinates such as sodium di-2-ethylhexyl sulfosuccinate.

[0014] Examples of cationic surfactants include tertiary amine compounds and quaternary ammonium salts. Tertiary amine compounds can be salts formed with organic acids and / or inorganic acids. Examples include alkyltrimethylammonium salts such as octyltrimethylammonium, decyltrimethylammonium chloride, lauryltrimethylammonium chloride, and tetradecyltrimethylammonium chloride; and dialkyldimethylammonium salts such as didecyldimethylammonium chloride and distearyldimethylammonium chloride.

[0015] Examples of nonionic surfactants include polyoxyethylene fatty acid esters such as propylene glycol fatty acid esters and polyethylene glycol monolaurate; polyoxyethylene alkyl ethers; polyoxyethylene sorbitol fatty acid esters; polyoxyethylene glycerin fatty acid esters; polyoxyethylene propylene glycol fatty acid esters; polyoxyethylene castor oil; polyoxyethylene hydrogenated castor oil; polyoxyethylene hydrogenated castor oil fatty acid esters; alkyl polyglucosides; and polyoxyalkylene-modified silicones such as polyoxyethylene-methylpolysiloxane copolymers. Among these, one or more selected from the group consisting of polyoxyethylene fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene hydrogenated castor oil, and alkyl polyglucosides are preferred, and one or more selected from the group consisting of polyoxyethylene fatty acid esters, polyoxyethylene hydrogenated castor oil, and alkyl polyglucosides are more preferred, with alkyl polyglucosides being even more preferred.

[0016] Examples of amphoteric surfactants include betaine-based amphoteric surfactants such as lauryldimethylaminoacetic acid betaine, lauroylamide betaine, and lauryl sulfobetaine.

[0017] The molecular weight of the polyol is preferably 70 or more, more preferably 100 or more, and even more preferably 150 or more, from the viewpoints of foaming property, storage stability, and feel in use, and is preferably 10,000 or less, more preferably 6,000 or less, and even more preferably 1,000 or less, from the viewpoints of ease of production and foaming property. Examples of polyols include dihydric alcohols such as 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, and hexanediol, trihydric or higher alcohols such as trimethylolpropane, monosaccharides such as glucose and mannitol, disaccharides, and polysaccharides such as dextrin, with sugars being preferred, and one or more selected from glucose, mannitol, and dextrin being more preferred, one or more selected from mannitol and dextrin being even more preferred, and mannitol being even more preferred.

[0018] The weight-average molecular weight of the water-soluble polymer is preferably 1,000 to 100,000, more preferably 2,000 to 80,000, and even more preferably 5,000 to 50,000. The water-soluble polymer is preferably one or more selected from carboxylic acid-based synthetic polymers, water-soluble (modified) natural polymers, polyglycerin, polyethylene glycol, and polypropylene glycol. Examples of water-soluble (modified) natural polymers include polysaccharides, which may be substituted with an ionic group, a methoxy group, or the like. Examples of carboxylic acid-based synthetic polymers include polyacrylic acid and salts thereof, and copolymers of maleic acid and acrylic acid and salts thereof.

[0019] As the water-soluble inorganic salt, hydratable salts such as sodium carbonate, sodium sulfate, magnesium sulfate, etc. are preferred from the viewpoint of hygroscopicity. Sodium carbonate can be used as a coating material for alkali metal bicarbonates, preferably sodium bicarbonate.

[0020] [Non-aqueous solvent] The dielectric constant of the non-aqueous solvent at 25°C is 10 or less, preferably 5 or less, more preferably 3 or less, from the viewpoint of storage stability, and may be 1.5 or more, from the viewpoint of availability. The melting point of the non-aqueous solvent is preferably 0°C or less, more preferably -10°C or less. The dissolution amount of the non-aqueous solvent in 100 g of water (25°C, 1013.25 hPa) is preferably 1 g or less, more preferably 0.1 g or less. From the viewpoint of storage stability, the non-aqueous solvent is preferably one or more selected from hydrocarbons, esters, and silicones, and hydrocarbons are more preferred. When two or more non-aqueous solvents are used, the dielectric constant is a weighted average value of the non-aqueous solvents.

[0021] The hydrocarbon may be linear or branched, saturated or unsaturated. From the viewpoint of storage stability, the number of carbon atoms of the hydrocarbon is preferably 5 or more, more preferably 10 or more, and even more preferably 20 or more, and from the viewpoint of ease of production, it is preferably 100 or less, more preferably 50 or less, and even more preferably 30 or less. Examples of the hydrocarbon include aromatic hydrocarbons, alkanes, and paraffins, and hexane, xylene, and squalane are preferred, and squalane is more preferred.

[0022] The ester preferably includes one or more selected from the group consisting of a carboxylic acid ester of a monocarboxylic acid and a monohydric alcohol, a carboxylic acid ester of a monocarboxylic acid and a polyhydric alcohol, and a polycarboxylic acid ester of a polycarboxylic acid and a monohydric alcohol. It is more preferable to include a carboxylic acid ester of a monocarboxylic acid and a monohydric alcohol and / or a carboxylic acid ester of a monocarboxylic acid and a polyhydric alcohol. Examples of raw alcohols for the ester include monohydric alcohols and polyhydric alcohols such as glycerin, propylene glycol, trimethylolpropane, pentaerythritol, sorbitol, and sucrose. Examples of carboxylic acids include monocarboxylic acids such as fatty acids and polycarboxylic acids such as adipic acid, terephthalic acid, and trimellitic acid. The carbon number of the monohydric alcohol and the monocarboxylic acid is preferably 1 to 50, more preferably 1 to 30, and even more preferably 1 to 16, and may be saturated or unsaturated. Examples include jojoba oil, argan oil, olive oil, and coconut oil.

[0023] Examples of silicones include dimethyl silicone (dimethyl polysiloxane), methylphenyl polysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, methylhydrogen polysiloxane, silicone resin, amino-modified silicone, alkyl-modified silicone, polyether-modified silicone, glyceryl-modified silicone, and silicone wax.

[0024] [Agent A] (Carbonate particles (Carbonate A)) In the present invention, Agent A contains carbonate particles (Carbonate A). The carbonate A used in the present invention is a component that is neutralized by organic acid particles (organic acid B) having 2 to 6 carbon atoms contained in Agent B, thereby generating carbon dioxide gas. The carbonate A is preferably at least one selected from alkali metal carbonates and alkali metal hydrogen carbonates. As the carbonate A, at least one selected from sodium carbonate, potassium carbonate, sodium hydrogen carbonate, and potassium hydrogen carbonate is more preferred, and from the viewpoints of raw material cost and foaming property, sodium carbonate (Na ２ CO ３) and sodium bicarbonate (NaHCO ３ ), and sodium bicarbonate (NaHCO ３ ) is even more preferred.

[0025] When carbonate A is coated with a coating material, the average particle size of carbonate A before coating with the coating material is preferably 1 μm or more, more preferably 10 μm or more, and even more preferably 20 μm or more from the viewpoint of storage stability, and is preferably 500 μm or less, more preferably 200 μm or less, and even more preferably 150 μm or less from the viewpoint of usability and foaming property, and from these viewpoints, is preferably 1 μm or more and 500 μm or less, more preferably 10 μm or more and 200 μm or less, and even more preferably 20 μm or more and 150 μm or less. Furthermore, when carbonate A is not coated with a coating material, the average particle size of carbonate A is the same as above. Furthermore, when carbonate A is coated with a coating material, granulation is usually involved. The average particle size of carbonate A after coating with the coating material is preferably 40 μm or more, more preferably 60 μm or more, and even more preferably 80 μm or more from the viewpoint of storage stability, and preferably 2000 μm or less, more preferably 1000 μm or less, and even more preferably 500 μm or less from the viewpoint of foaming property and usability. From these viewpoints, it is 40 μm or more and 2000 μm or less, more preferably 60 μm or more and 1000 μm or less, and even more preferably 80 μm or more and 500 μm or less. The average particle size of carbonate A can be measured by the method described in the Examples. If the particle size is larger than the above-mentioned particle size, it is preferable to crush the carbonate A in advance to a suitable particle size. Examples of crushers that can be used for crushing include impact crushers such as hammer crushers, impact crushers such as atomizers and pin mills, and shear crushers such as flash mills. These may be used in a single-stage operation or in a multi-stage operation using the same or different types of crushers.

[0026] From the viewpoint of foamability, the content of carbonate A in agent A is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and even more preferably 80% by mass or more, and from the viewpoint of containing a coating material and excellent storage stability, it is 100% by mass or less, preferably 97% by mass or less, more preferably 95% by mass or less, and even more preferably 93% by mass or less. From the viewpoint of foamability, the content of carbonate A in agent A is preferably 50% by mass or more and 100% by mass or less, more preferably 60% by mass or more and 100% by mass or less, even more preferably 70% by mass or more and 100% by mass or less, and even more preferably 80% by mass or more and 100% by mass or less, and from the viewpoint of foamability and storage stability, it is preferably 50% by mass or more and 97% by mass or less, more preferably 70% by mass or more and 95% by mass or less, and even more preferably 80% by mass or more and 93% by mass or less.

[0027] When agent A contains a coating material (i.e., when carbonate A is coated with a coating material), the content of the coating material in agent A is preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, and even more preferably 20% by mass or less, from the viewpoint of foamability, and is preferably 3% by mass or more, more preferably 5% by mass or more, and even more preferably 7% by mass or more, from the viewpoint of excellent storage stability due to the inclusion of a coating material. The content of the coating material in agent A is preferably 3% by mass or more and 50% by mass or less, more preferably 5% by mass or more and 30% by mass or less, and even more preferably 7% by mass or more, from the viewpoint of foamability and storage stability. Furthermore, the mass ratio of the coating material to the carbonate A in agent A (coating material / carbonate A) is preferably 0.03 or more, more preferably 0.05 or more, and even more preferably 0.07 or more, from the viewpoint of storage stability, and is preferably 1 or less, more preferably 0.5 or less, and even more preferably 0.3 or less, from the viewpoint of foamability, and is preferably 0.03 or more and 1 or less, more preferably 0.05 or more and 0.5 or less, and even more preferably 0.07 or more and 0.3 or less.

[0028] [Agent B] (Organic Acid Particles (Organic Acid B) Having 2 to 6 Carbon Atoms) In the present invention, Agent B contains organic acid particles (organic acid B) having 2 to 6 carbon atoms. The organic acid B used in the present invention is a component for neutralizing carbonate particles (carbonate A) and generating carbon dioxide gas (carbon dioxide). The organic acid B is not particularly limited as long as it is an organic acid having 2 to 6 carbon atoms, but is preferably one or more selected from succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, citric acid, and pyrrolidonecarboxylic acid. Among these, a compound having two or more carboxy groups is preferred, and it is more preferable to use at least one selected from fumaric acid, succinic acid, malic acid, and citric acid, with malic acid being even more preferred. These organic acids B may be used alone or in appropriate combination of two or more.

[0029] When organic acid B is coated with a coating material, the average particle size of organic acid B before coating with the coating material is preferably 1 μm or more, more preferably 30 μm or more, and even more preferably 50 μm or more from the viewpoint of storage stability, and is preferably 1000 μm or less, more preferably 800 μm or less, and even more preferably 500 μm or less from the viewpoint of usability and foaming property, and from these viewpoints, is preferably 1 μm or more and 1000 μm or less, more preferably 20 μm or more and 800 μm or less, and even more preferably 50 μm or more and 500 μm or less. When organic acid B is not coated with a coating material, the average particle size of organic acid B is the same as above. Furthermore, when organic acid B is coated with a coating material, granulation is usually involved. The average particle size of organic acid B after coating with the coating material is preferably 50 μm or more, more preferably 100 μm or more, and even more preferably 200 μm or more from the viewpoint of storage stability. From the viewpoint of foaming property and usability, it is preferably 3000 μm or less, more preferably 2000 μm or less, and even more preferably 1000 μm or less. From these viewpoints, it is 50 μm or more and 3000 μm or less, more preferably 100 μm or more and 2000 μm or less, and even more preferably 200 μm or more and 1000 μm or less. The average particle size of organic acid B can be measured by the method described in the Examples. If the particle size is larger than the above-mentioned particle size, it is preferable to pre-crush the organic acid B to a suitable particle size. Examples of crushers that can be used for crushing include impact crushers such as hammer crushers, impact crushers such as atomizers and pin mills, and shear crushers such as flash mills. These may be performed in a single stage or in a multi-stage operation using the same or different types of crushers.

[0030] The content of organic acid B in component B is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and even more preferably 75% by mass or more from the viewpoint of foamability, and is 100% by mass or less, preferably 96% by mass or less, more preferably 95% by mass or less, and even more preferably 93% by mass or less from the viewpoint of storage stability including a coating material. The content of organic acid B in component B is preferably 50% by mass or more and 100% by mass or less, more preferably 60% by mass or more and 100% by mass or less, even more preferably 70% by mass or more and 100% by mass or less, and even more preferably 75% by mass or more and 100% by mass or less from the viewpoint of foamability, and is preferably 60% by mass or more and 96% by mass or less, more preferably 70% by mass or more and 95% by mass or less, and even more preferably 75% by mass or more and 93% by mass or less from the viewpoint of foamability and storage stability.

[0031] When component B contains a coating material (i.e., when organic acid B is coated with a coating material), the content of the coating material in component B is preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, and even more preferably 20% by mass or less, from the viewpoint of foamability, and is preferably 3% by mass or more, more preferably 5% by mass or more, and even more preferably 7% by mass or more, from the viewpoint of excellent storage stability due to the inclusion of a coating material. The content of the coating material in component B is preferably 3% by mass or more and 50% by mass or less, more preferably 5% by mass or more and 30% by mass or less, and even more preferably 7% by mass or more, from the viewpoint of foamability and storage stability. The mass ratio of the coating material to the organic acid B in agent B (coating material / organic acid B) is preferably 0.03 or more, more preferably 0.05 or more, and even more preferably 0.07 or more, from the viewpoint of storage stability, and is preferably 1 or less, more preferably 0.5 or less, and even more preferably 0.3 or less, from the viewpoint of foamability, and is preferably 0.03 or more and 1 or less, more preferably 0.05 or more and 0.5 or less, and even more preferably 0.07 or more and 0.3 or less.

[0032] In the present invention, in addition to the above-mentioned components, other components may be added to Agent A and Agent B. Examples of other components include fragrances, antioxidants, antibacterial and antifungal agents, disinfectants, colorants, disintegrating agents, anti-fading agents, and pH adjusters.

[0033] [Content of Each Component in Foamable Composition] The content of the agent A in the foaming agent composition of the present invention is preferably 1% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more from the viewpoint of foamability, and is preferably 50% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less from the viewpoint of storage stability and containing agent B. The content of the agent B in the foaming agent composition of the present invention is preferably 1% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more from the viewpoint of foamability, and is preferably 50% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less from the viewpoint of storage stability and containing agent A. The content of the nonaqueous solvent in the foaming agent composition of the present invention is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 20% by mass or more from the viewpoint of storage stability and usability, and is preferably 98% by mass or less, more preferably 90% by mass or less, and even more preferably 80% by mass or less from the viewpoint of containing agent A and agent B and foaming. Therefore, from the viewpoints of foamability, storage stability, and usability, the foaming agent composition of the present invention preferably has a content of the agent A of 1% by mass or more and 50% by mass or less, a content of the agent B of 1% by mass or more and 50% by mass or less, and a content of the non-aqueous solvent of 5% by mass or more and 98% by mass or less, more preferably has a content of the agent A of 5% by mass or more and 45% by mass or less, a content of the agent B of 5% by mass or more and 45% by mass or less, and a content of the non-aqueous solvent of 10% by mass or more and 90% by mass or less, and even more preferably has a content of the agent A of 10% by mass or more and 40% by mass or less, a content of the agent B of 10% by mass or more and 40% by mass or less, and a content of the non-aqueous solvent of 20% by mass or more and 80% by mass or less.

[0034] The foaming agent composition of the present invention may contain other components as needed. Examples of other components include thickeners, moisture absorbents, etc. Examples of thickeners include dextrin palmitate and fumed silica (anhydrous silicic acid). The thickener is preferably one or more selected from dextrin palmitate and fumed silica, and more preferably fumed silica. Examples of moisture absorbents include magnesium oxide, sodium carbonate, sodium sulfate, potassium sulfate, magnesium sulfate, etc. Among these, the moisture absorbent is preferably one or more selected from magnesium oxide and sodium carbonate, and more preferably magnesium oxide.

[0035] <Production Method> [Production of Agent A or Agent B] In the present invention, when carbonate A or organic acid B is at least partially coated on its surface with a coating material, agent A or agent B can be obtained, for example, by fluidized bed coating. The method for producing agent A or agent B in the present invention preferably includes at least the following steps 1-1 to 1-2. Step 1-1: A step of mixing a coating material that dissolves in 100 g of water at a rate of 5 g or more with water to prepare an aqueous coating material solution. Step 1-2: A step of coating and granulating carbonate A or organic acid B while mixing the aqueous coating material solution with the carbonate A or organic acid B in a fluidized bed to obtain agent A or agent B.

[0036] In step 1-1, the method for preparing the coating material aqueous solution is not particularly limited, and any known method can be used.

[0037] In step 1-2, when the coating and granulation are carried out while mixing the aqueous coating material solution with the carbonate A or the organic acid B in a fluidized bed, it is preferable to use, for example, a fluidized bed granulator.

[0038] In order to set the average particle size of the resulting agent A or agent B within the above-mentioned range, it is preferable to have a step of pulverizing carbonate A or organic acid B before step 1-1 or 1-2, as necessary.

[0039] [Production of Foaming Agent Composition] The foaming agent composition can be obtained by mixing the above-mentioned components A, B, and non-aqueous solvent, and, if necessary, other components such as a thickener, a moisture absorbent, etc. The method for mixing the components is not particularly limited, and known methods can be used.

[0040] [Uses, etc.] The foaming agent composition of the present invention is mixed with water and foamed for use. Due to the above-described characteristics, the foaming agent composition of the present invention can efficiently generate carbon dioxide when mixed with water, thereby exhibiting excellent foaming properties. For example, a binder, a humectant, a surfactant, a preservative, a fragrance, a medicinal ingredient, a colorant, etc. can be appropriately blended with the water to be mixed. Examples of binders include sodium carboxymethylcellulose, sodium polyacrylate, hydroxyethyl cellulose, thickening silica, montmorillonite, carrageenan, sodium alginate, guar gum, and pectin. Examples of humectants include propylene glycol, 1,3-butylene glycol, ethylene glycol, polyethylene glycol, polypropylene glycol, maltose, and lactose. Examples of surfactants include alkyl sulfates such as sodium lauryl sulfate, salts of acylamino acids such as sodium acyl glutamate and sodium acyl sarcosinate, salts of alkyl phosphates such as sodium lauryl phosphate, sucrose fatty acid esters, sorbitan fatty acid esters, and polyoxyethylene fatty acid esters. Examples of preservatives include parabens, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate, and sodium benzoate. Examples of fragrances include menthol and natural products containing menthol; essential oils and extracts of basil, camphor, caraway, cardamom, coriander, geranium, ginger, laurel, lavender, mace, nutmeg, pepper, rose, rosemary, thyme, ylang-ylang, jasmine, vanilla, hyssop, lavandin, orris, carrot seed, davana, elemi, and osmanthus; borneol and derivatives thereof; heliotropin; α-, β-, γ-, and δ-ionone and derivatives thereof; vanillin, ethyl vanillin, maltol, and ethyl maltol. The above-mentioned components may be used alone or in combination of two or more.

[0041] Due to the above-described characteristics, the foaming agent composition of the present invention has excellent foaming properties, storage stability, and usability. Therefore, the foaming agent composition of the present invention can be suitably used for cosmetics. Examples of cosmetics include hair cosmetics and skin cleansers. Specific examples of hair cosmetics include hair shampoos, hair rinses, treatments, and hair conditioners. Specific examples of skin cleansers include body soaps, hand washes, face washes, and makeup removers. The foaming agent composition of the present invention can also be used in a two-component container, which is designed to be mixed with the two components when used. Examples of two-component containers include pump-type and tube-type containers. Specifically, the composition of the present invention is placed in one side of a two-component container, and an aqueous phase component mainly composed of water is placed in the other side. The two components are simultaneously discharged by pump pressure or extrusion through a tube, and can be mixed by hand or the like to foam.

[0042] [Method for Generating Carbon Dioxide] The method for generating carbon dioxide of the present invention involves mixing the above-mentioned blowing agent composition of the present invention with water. It is preferable to mix water in an amount of preferably 1 part by mass or more, more preferably 1.5 parts by mass or more, and even more preferably 2 parts by mass or more, per 1 part by mass of the blowing agent composition of the present invention. In the method for generating carbon dioxide of the present invention, the mixing mass ratio of the blowing agent composition to water (blowing agent composition / water) is preferably 0.05 or more and 1.00 or less, more preferably 0.10 or more and 0.80 or less, and even more preferably 0.15 or more and 0.50 or less, from the viewpoint of the amount of carbon dioxide generated. It is also preferable to stir the mixture during mixing.

[0043] The present invention further discloses the following [1] to

[39] . [1] A blowing agent composition comprising: a component A containing carbonate particles; a component B containing organic acid particles having a carbon number of 2 to 6; and a non-aqueous solvent, wherein the non-aqueous solvent has a dielectric constant of 10 or less at 25°C; at least one of the components A and B contains a coating material having a solubility of 5 g or more in 100 g of water; and at least one of the carbonate particles and the organic acid particles is coated on at least a portion of its surface with the coating material. [2] The blowing agent according to [1], wherein the non-aqueous solvent has a dielectric constant of 5 or less at 25°C. [3] The blowing agent composition according to [1] or [2], wherein the non-aqueous solvent has a dielectric constant of 3 or less at 25°C. [4] The blowing agent composition according to any of [1] to [3], wherein the non-aqueous solvent is one or more selected from the group consisting of hydrocarbons, esters, and silicones. [5] The blowing agent composition according to [4], wherein the hydrocarbon is one or more selected from the group consisting of aromatic hydrocarbons, alkanes, and paraffins. [6] The blowing agent composition according to any one of [1] to [5], wherein at least one of the component A and the component B is granulated with the coating material. [7] The blowing agent composition according to any one of [1] to [6], wherein the solubility of the coating material in 100 g of water (25°C, 1013.25 hPa) is 10 g or more. [8] The blowing agent composition according to any one of [1] to [7], wherein the solubility of the coating material in 100 g of water (25°C, 1013.25 hPa) is 20 g or more. [9] The blowing agent composition according to any one of [1] to [8], wherein the coating material is one or more selected from the group consisting of surfactants, polyols, water-soluble polymers, and water-soluble inorganic salts.

[10] The foaming agent composition according to any one of [1] to [9], wherein the carbonate particles are one or more selected from the group consisting of alkali metal carbonates and alkali metal bicarbonates.

[11] The foaming agent composition according to any one of [1] to

[10] , wherein the carbonate particles are one or more selected from the group consisting of sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate.

[12] The foaming agent composition according to any one of [1] to

[11] , wherein the organic acid particles are one or more selected from the group consisting of succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, citric acid, and pyrrolidonecarboxylic acid.

[13] The blowing agent composition according to any one of [1] to

[12] , wherein the average particle size of the carbonate particles before being coated with the coating material, or the average particle size of the carbonate particles when not coated with the coating material, is 1 μm or more and 500 μm or less.

[14] The blowing agent composition according to any one of [1] to

[13] , wherein the average particle size of the carbonate particles before being coated with the coating material, or the average particle size of the carbonate particles when not coated with the coating material, is 10 μm or more and 200 μm or less.

[15] The blowing agent composition according to any one of [1] to

[14] , wherein the average particle size of the carbonate particles before being coated with the coating material, or the average particle size of the carbonate particles when not coated with the coating material, is 20 μm or more and 150 μm or less.

[16] The blowing agent composition according to any one of [1] to

[15] , wherein the average particle size of the carbonate particles after being coated with the coating material is 40 μm or more and 2000 μm or less.

[17] The blowing agent composition according to any one of [1] to

[16] , wherein the carbonate particles after coating with the coating material have an average particle size of 60 μm or more and 1,000 μm or less.

[18] The blowing agent composition according to any one of [1] to

[17] , wherein the carbonate particles after coating with the coating material have an average particle size of 80 μm or more and 500 μm or less.

[19] The blowing agent composition according to any one of [1] to

[18] , wherein the mass ratio of the coating material to the carbonate particles in Agent A (coating material / carbonate particles) is 0.03 or more and 1 or less.

[20] The blowing agent composition according to any one of [1] to

[19] , wherein the mass ratio of the coating material to the carbonate particles in Agent A (coating material / carbonate particles) is 0.05 or more and 0.5 or less.

[21] The blowing agent composition according to any one of [1] to

[20] , wherein the mass ratio of the coating material to the carbonate particles in Agent A (coating material / carbonate particles) is 0.07 or more and 0.3 or less.

[22] The blowing agent composition according to any one of [1] to

[21] , wherein the organic acid particles have an average particle size of 1 μm or more and 1,000 μm or less before being coated with the coating material, or an average particle size of the organic acid particles when not coated with the coating material.

[23] The blowing agent composition according to any one of [1] to

[22] , wherein the organic acid particles have an average particle size of 20 μm or more and 800 μm or less before being coated with the coating material, or an average particle size of the organic acid particles when not coated with the coating material.

[24] The multi-component foaming agent composition according to any one of [1] to

[23] , wherein the organic acid particles have an average particle size of 50 μm or more and 500 μm or less before being coated with the coating material, or an average particle size of the organic acid particles when not coated with the coating material.

[25] The foaming agent composition according to any one of [1] to

[24] , wherein the organic acid particles have an average particle size of 50 μm or more and 3000 μm or less after being coated with the coating material.

[26] The foaming agent composition according to any one of [1] to

[25] , wherein the organic acid particles have an average particle size of 100 μm or more and 2000 μm or less after being coated with the coating material.

[27] The foaming agent composition according to any one of [1] to

[26] , wherein the organic acid particles have an average particle size of 200 μm or more and 1000 μm or less after being coated with the coating material.

[28] The blowing agent composition according to any one of [1] to

[27] , wherein the mass ratio of the coating material to the organic acid particles in Agent B (coating material / organic acid particles) is 0.03 or more and 1 or less.

[29] The blowing agent composition according to any one of [1] to

[28] , wherein the mass ratio of the coating material to the organic acid particles in Agent B (coating material / organic acid particles) is 0.05 or more and 0.5 or less.

[30] The blowing agent composition according to any one of [1] to

[29] , wherein the mass ratio of the coating material to the organic acid particles in Agent B (coating material / organic acid particles) is 0.07 or more and 0.3 or less.

[31] The blowing agent composition according to any one of [1] to

[30] , wherein the content of the agent A is 1% by mass or more and 50% by mass or less, the content of the agent B is 1% by mass or more and 50% by mass or less, and the content of the non-aqueous solvent is 5% by mass or more and 98% by mass or less.

[32] The blowing agent composition according to any one of [1] to

[31] , wherein the content of the agent A is 5% by mass or more and 45% by mass or less, the content of the agent B is 5% by mass or more and 45% by mass or less, and the content of the non-aqueous solvent is 10% by mass or more and 90% by mass or less.

[33] The blowing agent composition according to any one of [1] to

[32] , wherein the content of the agent A is 10% by mass or more and 40% by mass or less, the content of the agent B is 10% by mass or more and 40% by mass or less, and the content of the non-aqueous solvent is 20% by mass or more and 80% by mass or less.

[34] The blowing agent composition according to any one of [1] to

[33] , wherein the molar equivalent ratio (carbonate / organic acid) of the carbonate particles in the agent A to the organic acid particles in the agent B is 0.5 or more and 2 or less.

[35] The foaming agent composition according to any one of [1] to

[34] , wherein the molar equivalent ratio (carbonate / organic acid) of the carbonate particles in the agent A to the organic acid particles in the agent B is 0.8 or more and 1.2 or less.

[36] The foaming agent composition according to any one of [1] to

[35] , wherein the agent A and the agent B are dispersed in the non-aqueous solvent.

[37] The foaming agent composition according to any one of [1] to

[36] , which is used by mixing with water and foaming.

[38] The foaming agent composition according to any one of [1] to

[37] , which is used for cosmetics.

[39] A method for generating carbon dioxide, which comprises mixing the foaming agent composition according to any one of [1] to

[38] with water.

[0044] In the following examples and comparative examples, "%" means "% by mass" unless otherwise specified. Measurement of each physical property value was carried out by the following methods. The numerical values ​​of the blending composition in the tables are values ​​of solid content.

[0045] [Measurement and Evaluation Methods] <Average particle size of carbonates and organic acids> The average particle size of uncoated carbonates and organic acids was measured by a laser diffraction method. The median diameter (D ５０) was used as the average particle size. The measurement temperature was 25°C, and the relative refractive index was 1.2. The average particle size of the coated carbonate and organic acid was calculated from the mass distribution of each sieve size after vibrating 100 g of particles for 5 minutes using a standard sieve (mesh opening: 45 to 2000 μm) specified in JIS K 8801. Specifically, the particles were vibrated for 5 minutes using sieves of 2000, 1400, 1000, 710, 500, 355, 250, 180, 125, 90, 63, and 45 μm specified in JIS Z 8801-1 (established May 20, 2000, last revised November 20, 2006), and the 50% average diameter was calculated from the under-sieve mass distribution by sieving, and this was used as the average particle size. The sieves described above were stacked on a tray in order from the smallest mesh size, and 50 g of granules was added to the top 2000 μm sieve. The sieve was then covered and attached to a low-tap sieve shaker (manufactured by Hirako Seisakusho Co., Ltd., tapping 156 times / min, rolling: 290 times / min), and vibrated for 5 minutes. The mass of the granules remaining on each sieve and tray was measured, and the mass proportion (%) of the granules on each sieve was calculated. The mass proportions of the granules on the sieves with the smallest mesh size, starting from the tray, were added up, and the particle size at which the total was 50% was defined as the average particle size.

[0046] <Method for Evaluating Foaming Property> A 200 mL graduated cylinder was charged with a mixture of 4.04 g of ion-exchanged water, 5.92 g of Emal 227PH-11(W), and 0.04 g of Keldent, and 1.5 g of the foaming agent composition of the Examples and Comparative Examples was added while stirring at 600 r / min using a magnetic stirrer (major axis 40 mm, minor axis 15 mm). The foam volume (room temperature 25°C) was calculated using the following formula from the volumes after 1 minute and 3 minutes. A larger foam volume indicates better foaming property. Foam volume (mL) = (volume [mL] after 1 minute or 3 minutes) - 10

[0047] <Method for Evaluating Storage Stability> (Conversion Rate (%) (25°C) of Amount Remaining After One Year) 60 g of the blowing agent compositions of the Examples and Comparative Examples were charged into a screw tube (manufactured by Maruemu Corporation, No. 8, capacity 110 mL), and then allowed to stand at 25°C and a relative humidity of 40% without a lid. The mass of the screw tube (including the contents of the screw tube) was measured at predetermined times, and the mass of the screw tube (including the contents of the beaker) was measured at least once every 12 hours for 7 days or more. The estimated amount remaining after one year at 25°C was calculated using the following formula. A larger estimated amount remaining after one year indicates better storage stability. Estimated amount remaining after one year [%] = (1 - (average rate of mass change over 7 days [g / day]) / theoretical amount of carbon dioxide generated [g] × 365 [days]) × 100. The theoretical amount of carbon dioxide generated according to the above formula is as follows. Theoretical amount of carbon dioxide generated [g] = (amount of sodium bicarbonate charged [g] / 84 [g / mol]) × 44 [g / mol] (Conversion rate (%) of amount remaining after one month (40°C)) 60 g of the blowing agent compositions of the Examples and Comparative Examples were charged into a screw tube (manufactured by Maruemu Co., Ltd., No. 8, capacity 110 mL), and then allowed to stand at 40°C and a relative humidity of 40% without a lid. The mass of the screw tube (including the contents of the screw tube) was measured at predetermined time intervals, and the mass of the screw tube (including the contents of the beaker) was measured at least once every 24 hours for 7 days or more. The estimated amount remaining after one month at 40°C was calculated using the following formula. A larger estimated amount remaining after one month indicates better storage stability. Estimated remaining amount after one month [%] = (1 - (average mass change rate over seven days [g / day]) / theoretical amount of carbon dioxide generated [g] × 30 [days]) × 100. The theoretical amount of carbon dioxide generated in the above formula is as follows: Theoretical amount of carbon dioxide generated [g] = (amount of sodium bicarbonate charged [g] / 84 [g / mol]) × 44 [g / mol].

[0048] <Method for evaluating the feeling of use> Three expert panelists were asked to prepare a mixture of 0.3 g of the foaming agent composition of each of the Examples and Comparative Examples, 0.81 g of ion-exchanged water, 1.18 g of Emal 227PH-11(W), and 0.01 g of Keldent, and after mixing for 10 seconds with a glass stirring rod, the mixture was placed on the back of the hand and massaged, and the feeling of use was evaluated according to the following criteria: A: No granular feeling at all B: Almost no granular feeling C: Strong granular feeling

[0049] The EMALE 227PH-11(W) and KELDENT used in the evaluation of foaming property and the evaluation of usability are as follows: EMALE 227PH-11(W): Polyoxyethylene lauryl ether sodium sulfate, solid content 27%, manufactured by Kao Corporation KELDENT: Xanthan gum, manufactured by Okahata Kosan Co., Ltd.

[0050] The following raw materials were used in this production example and comparative production example. The dissolution amount means the amount (g) dissolved in 100 g of water at 25°C. The relative dielectric constant means the relative dielectric constant at 25°C. (Agent A: Carbonate A) Baking soda (sodium hydrogen carbonate): manufactured by Tosoh Corporation, sodium bicarbonate P, average particle size 114 μm (Agent B: Organic acid B) Malic acid: manufactured by Fuso Chemical Co., Ltd., FUSO M, average particle size 446 μm (Coating material) Lauryl glycoside: manufactured by Kao Corporation, Mydol 12, solid content 40%, dissolution amount 100 or more Mannitol: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., D-mannitol, dissolution amount 17 Dextrin: manufactured by Nihon Starch Chemical Co., Ltd., dextrin CZRM-X, dissolution amount 100 or more Sodium carbonate: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., sodium carbonate (soda ash), dissolution amount 17 (Coating material for comparison) Behenyl alcohol: manufactured by Kao Corporation, Kalcol 220-80, dissolution amount 0.1 or less (Non-aqueous solvent) Squalane: Sugar squalane manufactured by Nippon Surfactant Co., Ltd., relative permittivity 2.1 Silicone: KF-96A-100cs (methylpolysiloxane) manufactured by Shin-Etsu Chemical Co., Ltd., relative permittivity 2.76 Jojoba oil: Refined jojoba oil (ester) manufactured by Koei Kogyo Co., Ltd., relative permittivity 2.76 Propylene glycol: Fujifilm Wako Pure Chemical Industries, Ltd., relative permittivity 29.7 (thickener) Dextrin palmitate: Leopearl KL2 manufactured by Chiba Flour Milling Co., Ltd. Fumed silica: Aerosil 300 manufactured by Nippon Aerosil Co., Ltd. (moisture absorbent) Magnesium oxide: Light 100 manufactured by Kyowa Chemical Industry Co., Ltd. Sodium carbonate: Sodium carbonate (soda ash) manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0051] Production Examples of Agent A (Production Example 1: Fluidized Bed Coating (Granulation)) A pulverizer (Dalton Corporation, Sample Mill KII-W) equipped with a 0.7 mm screen hole diameter at the outlet was operated at 12,390 rpm while sodium bicarbonate was supplied at 1,000 g / min to obtain pulverized sodium bicarbonate of 28 μm. 75 g of Mydol 12 (40% aqueous solution of lauryl glycoside) and 125 g of ion-exchanged water were mixed at room temperature for 30 minutes to prepare an aqueous coating solution (solid content 30.0 g). 300 g of pulverized sodium bicarbonate was charged into a fluidized bed granulator (Powrex Corporation, FD-LAB-1), and the airflow was 80 m ３ / hr, and an intake air temperature of 100°C, 200 g of a previously prepared aqueous coating solution was added at a rate of 15 g / min to perform granulation, thereby obtaining granules of 265 µm in size.

[0052] (Production Example 2: Fluidized Bed Coating (Granulation)) Granules of 406 μm were obtained in the same manner as in Production Example 1, except that the sodium bicarbonate was not previously pulverized.

[0053] (Production Example 3: Fluidized Bed Coating (Granulation)) Granules of 251 μm were obtained in the same manner as in Production Example 1, except that the sodium bicarbonate was not pulverized in advance and that an aqueous coating solution (solid content 30.0 g) prepared by mixing 30.0 g of mannitol and 170 g of ion-exchanged water at room temperature for 30 minutes was used.

[0054] (Production Example 4: Fluidized Bed Coating (Granulation)) Granules of 181 μm were obtained in the same manner as in Production Example 1, except that a coating solution (solid content 45.0 g) prepared by mixing 75 g of Mydol 12 (40% aqueous solution of lauryl glycoside), 15 g of sodium carbonate, and 125 g of ion-exchanged water at room temperature for 30 minutes was used.

[0055] (Production Example 5: Fluidized Bed Coating (Granulation)) Granules of 98 μm were obtained in the same manner as in Production Example 1, except that a coating solution (solid content 30.0 g) prepared by mixing 30.0 g of dextrin and 170 g of ion-exchanged water at room temperature for 30 minutes was used.

[0056] (Production Example 6: Fluidized Bed Coating (Granulation)) Granules of 175 μm were obtained in the same manner as in Production Example 1, except that an aqueous coating solution (solid content 45.0 g) prepared by mixing 30.0 g of mannitol, 15 g of sodium carbonate, and 170 g of ion-exchanged water at room temperature for 30 minutes was used.

[0057] (Production Example 7: Pulverization of sodium bicarbonate) While a pulverizer (Dalton Co., Ltd., Sample Mill KII-W) having a screen hole diameter of 0.7 mm at the outlet was operated at 12,390 rpm, sodium bicarbonate was supplied at a rate of 1,000 g / min to obtain pulverized sodium bicarbonate of 28 μm.

[0058] (Production Example 8: Melt coating (granulation)) 300 g of sodium bicarbonate was mixed for 1 minute in a 2 L high-speed mixer (Earth Technica Corporation: LFS-2, agitator rotation speed 600 rpm / chopper rotation 1500 rpm / jacket hot water temperature 80°C) and after confirming that the powder temperature had reached 65°C or higher, 30.0 g of behenyl alcohol was added and mixed for 2 minutes, and the mixture was then discharged. The resulting mixture was placed in a tray and cooled to 25°C to obtain granules of 151 µm in size.

[0059] Production Example of Agent B (Production Example 9: Fluidized Bed Coating (Granulation)) A mill (Dalton Corporation, Sample Mill KII-W) equipped with a 0.7 mm screen hole diameter at the outlet was operated at 12,390 rpm while feeding malic acid at 1,000 g / min to obtain pulverized malic acid with a particle size of 63 μm. 75 g of Mydol 12 (40% aqueous solution of lauryl glycoside) and 125 g of ion-exchanged water were mixed at room temperature for 30 minutes to prepare an aqueous coating solution (solid content 30.0 g). 300 g of pulverized malic acid was charged into a fluidized bed granulator (Powrex Corporation, FD-LAB-1), and the airflow was 80 m ３ / hr, and an intake air temperature of 100°C, 200 g of a previously prepared aqueous coating solution was added at a rate of 15 g / min to perform granulation, thereby obtaining granules with a particle size of 307 µm.

[0060] (Production Example 10: Fluidized Bed Coating (Granulation)) Granules of 824 μm were obtained in the same manner as in Production Example 9, except that the malic acid was not subjected to a pulverization treatment beforehand.

[0061] (Production Example 11: Fluidized Bed Coating (Granulation)) Granules of 450 μm were obtained in the same manner as in Production Example 9, except that the malic acid was not subjected to a prior pulverization treatment and that an aqueous coating solution (solid content 30.0 g) prepared by mixing 30.0 g of mannitol and 170 g of ion-exchanged water at room temperature for 30 minutes was used.

[0062] (Production Example 12: Grinding treatment of malic acid) A grinder (Dalton Co., Ltd., Sample Mill KII-W) having a screen hole diameter of 0.7 mm at the outlet was operated at 12,390 rpm, while feeding malic acid at 1,000 g / min to obtain ground malic acid of 63 μm.

[0063] (Production Example 13: Melt coating (granulation)) 300 g of malic acid was mixed with a 2 L high-speed mixer (Earth Technica Corporation: LFS-2, agitator rotation speed 600 rpm / chopper rotation 1500 rpm / jacket hot water temperature 80°C) for 1 minute, and after confirming that the powder temperature had reached 65°C or higher, 30.0 g of behenyl alcohol was added and mixed for 2 minutes, and the mixture was then discharged. The resulting mixture was placed in a tray and cooled to 25°C to obtain granules of 282 µm in size. The compositions and combinations of Agents A and B used in the Examples and Comparative Examples are shown in Table 1.

[0064] Example 1: 500 g of squalane and 25 g of dextrin palmitate were placed in a 1 L beaker and mixed for at least 1 hour at 80°C using a stirrer (stirring bar 5 cm, rotation speed 800 rpm). A foaming agent composition was prepared by mixing the A and B components obtained in each production example, as well as the non-aqueous solvent, thickener, and moisture absorbent, at room temperature for 1 minute according to the composition shown in Table 2. The foaming ability, storage stability, and usability of the resulting foaming agent composition were evaluated according to the methods described above. The results are shown in Table 2.

[0065] Examples 2 to 9 and Comparative Examples 1 to 4: Foaming agent compositions were prepared in the same manner as in Example 1, except for the changes in the composition shown in Table 2. The resulting foaming agent compositions were evaluated for foaming ability, storage stability, and usability according to the methods described above. The results are shown in Table 2. Example 4 is an example in which Production Example 2 was used as Agent A and malic acid was used as Agent B without being crushed or coated. Example 5 is an example in which baking soda was used as Agent A without being crushed or coated, and Production Example 10 was used as Agent B. Examples 6, 7, and 9 are examples in which Production Example 1 was used as Agent A and malic acid was used as Agent B without being crushed or coated. Example 8 is an example in which Production Example 4 was used as Agent A and malic acid was used as Agent B without being crushed or coated. Comparative Example 1 is a comparative example in which baking soda was used as Agent A without being crushed or coated, and malic acid was used as Agent B without being crushed or coated. Comparative Example 2 is a comparative example in which only crushed baking soda from Production Example 7 was used as Agent A and only crushed malic acid from Production Example 12 was used as Agent B. Comparative Example 3 is a comparative example in which the melt-coated product of Production Example 8 was used as Agent A, and the melt-coated product of Production Example 13 was used as Agent B. Comparative Example 4 is a comparative example that was the same as Example 2, except that the non-aqueous solvent of the foaming agent composition was changed to propylene glycol.

[0066] Examples 10 to 14: 500 g of squalane and 25 g of Aerosil 300 were mixed for 10 minutes at 25°C and 12,000 rpm using a homomixer impeller manufactured by Primix Corporation. Thereafter, a foaming agent composition was prepared in the same manner as in Example 1, except that the composition was changed as shown in Table 2. Using the resulting foaming agent composition, the foaming ability, storage stability, and usability were evaluated according to the methods described above. The results are shown in Table 2. Examples 10, 12, and 13 are examples in which Production Example 1 was used as Agent A and malic acid was used as Agent B without being crushed or coated. Example 11 is an example in which Production Example 5 was used as Agent A and malic acid was used as Agent B without being crushed or coated. Example 14 is an example in which Production Example 6 was used as Agent A and malic acid was used as Agent B without being crushed or coated.

[0067]

[0068]

[0069] From Table 2, it can be seen that the foaming agent compositions of Examples 1 to 14, which are one embodiment of the present invention, are well-balanced and excellent in all of foaming property, storage stability, and usability, as compared with the foaming agent compositions of Comparative Examples 1 to 4.

[0070] According to the present invention, there are provided a foaming agent composition having excellent foaming properties, storage stability, and usability, and a method for generating carbon dioxide using the foaming agent composition. The foaming agent composition of the present invention can be suitably used for cosmetics.

Claims

1. A foaming agent composition comprising an A component including carbonate particles, an B component including organic acid particles having a carbon number of 2 or more and 6 or less, and a non-aqueous solvent, wherein the non-aqueous solvent has a relative dielectric constant of 10 or less at 25°C, at least one of the A component and the B component includes a coating material having a solubility of 5 g or more in 100 g of water, and at least one of the carbonate particles and the organic acid particles has at least a portion of its surface coated with the coating material.

2. The blowing agent composition according to claim 1, wherein the non-aqueous solvent is at least one selected from the group consisting of hydrocarbons, esters and silicones.

3. The foaming agent composition according to claim 1 or 2, wherein at least one of the agent A and the agent B is granulated with the coating material.

4. The blowing agent composition according to any one of claims 1 to 3, wherein the agent A and the agent B are dispersed in the non-aqueous solvent.

5. The foaming agent composition according to any one of claims 1 to 4, wherein the coating material is at least one selected from the group consisting of surfactants, polyols, water-soluble polymers and water-soluble inorganic salts.

6. The foaming agent composition according to any one of claims 1 to 5, wherein the carbonate particles are one or more types selected from the group consisting of alkali metal carbonates and alkali metal hydrogen carbonates.

7. The foaming agent composition according to any one of claims 1 to 6, wherein the organic acid particles are one or more selected from the group consisting of succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, citric acid and pyrrolidone carboxylic acid.

8. The foaming agent composition according to any one of claims 1 to 7, wherein the carbonate particles have an average particle size of 1 µm or more and 500 µm or less before being coated with the coating material.

9. The foaming agent composition according to any one of claims 1 to 8, wherein the organic acid particles have an average particle size of 1 µm or more and 1,000 µm or less before being coated with the coating material.

10. The foaming agent composition according to any one of claims 1 to 9, wherein the content of agent A in the foaming agent composition is 1% by mass or more and 50% by mass or less, the content of agent B is 1% by mass or more and 50% by mass or less, and the content of the non-aqueous solvent is 5% by mass or more and 98% by mass or less.

11. The foaming agent composition according to any one of claims 1 to 10, wherein a molar equivalent ratio (carbonate / organic acid) of the carbonate particles in the agent A to the organic acid particles in the agent B is 0.5 or more and 2 or less.

12. The foaming agent composition according to any one of claims 1 to 11, which is for use in cosmetics.

13. A method for generating carbon dioxide, comprising mixing the blowing agent composition according to any one of claims 1 to 12 with water.

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