Foamable aerosol composition and aerosol product

Abstract

To provide a foamable aerosol composition containing a biosurfactant, the foamable aerosol composition being capable of forming a rigid foam even with high content of an oily component, and being capable of forming a high-viscosity foam that is highly stable upon the application of force, as compared to the case without biosurfactant.SOLUTION: A foamable aerosol composition comprises: a stock solution composition containing water, an oily component, and a biosurfactant; and a propellant, wherein the content of the oily component in the stock solution composition is 30.0 mass% to 80.0 mass%, and the content of the biosurfactant in the stock solution composition is 0.05 mass% to 5.0 mass%.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present disclosure relates to foamable aerosol compositions and aerosol products containing biosurfactants. [Background technology]

[0002] Emulsion foam formulations are easy to spread and do not drip, so a small amount of the oil-based or water-based ingredients in the formulation can be applied to a wide area. In addition, the elasticity of the foam means that friction is reduced when applied to the skin, and a good, bouncy feel is achieved, which is why they are widely used in cosmetics. On the other hand, in the cosmetics market, the demand for emulsion foam preparations containing a large amount of oily ingredients is increasing due to diversifying customer needs. However, when a large amount of oily ingredients is added, there is a problem that the foam quality deteriorates and the foam breaks.

[0003] In order to solve the above problems, Patent Document 1 proposes that polyoxyethylene lauryl ether be contained in a concentrate of a foam aerosol composition. Moreover, Patent Document 2 proposes that inulin lauryl carbamate be contained as a surfactant in a concentrate of a foam-forming aerosol composition. Furthermore, Patent Document 3 proposes that diglycerol monolaurate or pentaglyceryl trioleate be contained as a lipophilic surfactant in the concentrate of a foamable aerosol composition. Furthermore, Patent Document 4 proposes a technology for improving storage stability by using an emulsion composition containing specific amounts of nonionic surfactants such as ceteth-20 or glyceryl stearate, and sodium surfactin as surfactants. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-002526 A [Patent Document 2] JP 2009-286769 A [Patent Document 3] JP 2014-169235 A [Patent Document 4] JP 2019-131473 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, even when polyoxyethylene lauryl ether or lauryl carbamate inulin is used as in Patent Document 1 and Patent Document 2, it was found that there is a problem in that hard foam cannot be formed and the foam breaks immediately when force is applied, resulting in low foam stability. Also, even when a lipophilic surfactant is used as in Patent Document 3, it was found that there is a problem in that hard, highly viscous foam cannot be formed. Furthermore, the emulsion composition of Patent Document 4 has not been examined from the viewpoint of forming a hard, highly viscous foam that is also highly stable when force is applied.

[0006] In view of these problems, the present disclosure provides a foamable aerosol composition that contains a biosurfactant, which is capable of forming a hard foam even when it contains a large amount of oily components, and which is capable of forming a foam with a high viscosity and a foam that is highly stable when force is applied, compared to a foam that does not contain a biosurfactant. [Means for solving the problem]

[0007] The inventors conducted intensive research to solve the above-mentioned problems, and as a result, discovered that by adding a biosurfactant to the concentrate of a foamable aerosol composition, a hard foam can be formed even in cases where a large amount of oily components are contained, and that a foam with a high viscosity and high stability when force is applied can be formed compared to when the composition does not contain a biosurfactant, which led to the completion of the present invention.

[0008] The present disclosure includes the following aspects. [1] A liquid concentrate composition containing water, an oil component, and a biosurfactant, and a propellant; The content of the oil component in the concentrate composition is 30.0% by mass to 80.0% by mass, The content of the biosurfactant in the concentrate composition is 0.05% by mass to 5.0% by mass. A foamable aerosol composition. [2] The foamable aerosol composition according to [1], wherein the concentrate composition further contains a nonionic surfactant having an HLB value of 7.0 or more. [3] The foamable aerosol composition according to [2], wherein the content of the nonionic surfactant in the concentrate composition is 0.05% by mass to 15.0% by mass. [4] The foamable aerosol composition according to [2] or [3], wherein the mass ratio of the content of the nonionic surfactant to the content of the biosurfactant in the foamable aerosol composition (the nonionic surfactant:the biosurfactant) is 10:1 to 1:10. [5] The foamable aerosol composition according to any one of [1] to [4], wherein the biosurfactant is a lipopeptide biosurfactant or a salt thereof. [6] The foamable aerosol composition according to any one of [1] to [5], wherein the propellant is at least one selected from the group consisting of liquefied petroleum gas, dimethyl ether, isopentane, isobutane, and carbon dioxide gas. [7] A container filled with a foamable aerosol composition, and a discharge mechanism provided in the container for discharging the foamable aerosol composition; 1. An aerosol product comprising: An aerosol product, wherein the foamable aerosol composition is the foamable aerosol composition according to any one of [1] to [6]. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a foaming aerosol composition containing a biosurfactant, which can form a hard foam even when it contains a large amount of an oily component, and which can form a foam with a high viscosity and a high stability when a force is applied, compared to a foaming aerosol composition not containing a biosurfactant.Furthermore, it is possible to provide a foaming aerosol composition with excellent emulsion stability. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The description of "XX to YY" or "XX to YY" representing a numerical range means a numerical range including the lower and upper limits, which are the endpoints, unless otherwise specified. When a numerical range is described in stages, the upper and lower limits of each numerical range can be arbitrarily combined.

[0011] [Biosurfactant] Each component used in the foamable aerosol composition will now be described. The foamable aerosol composition contains a concentrate composition and a propellant. The concentrate composition in the foamable aerosol composition contains a biosurfactant. A biosurfactant is a natural surfactant produced by a microorganism, and is generally highly biodegradable and has low skin irritation to the human body, and therefore has the characteristics of being extremely safe to the environment and the human body. The biosurfactant serves to emulsify the oily and aqueous components in the concentrate composition, and also serves as a foaming aid. Furthermore, by including a biosurfactant in the concentrate composition, even if the concentrate composition contains a large amount of oily components, it is possible to form a hard, highly viscous foam that gives a chewy feel to the extent that horns form when the foam is stirred with fingers, etc. Furthermore, it is possible to form a foam that is easy to maintain its hardness when pressure is applied to the foam with fingers, etc., i.e., a highly stable foam.

[0012] Biosurfactants include, but are not limited to, lipopeptide compounds such as surfactin, arthrofactin, and iturin; glycolipids such as mannosylerythritol lipid, sophorolipid, trehalose lipid, and rhamnolipid; fatty acids such as spiculisporic acid; polymers such as emulsan; and salts thereof.

[0013] Among the above, lipopeptide biosurfactants or salts thereof, which are lipopeptide compounds, are more preferred, and cyclic lipopeptide biosurfactants or salts thereof are even more preferred. In particular, the inventors speculate that cyclic lipopeptide biosurfactants form stable micelles by attracting cyclic peptide structures to each other through intermolecular hydrogen bonds, and that the bulky cyclic peptide structures are arranged in the foam film, so that the cyclic lipopeptide biosurfactants tend to form hard, highly viscous foams, and tend to form highly stable foams even when force is applied with fingers or the like. As the cyclic lipopeptide biosurfactant, one or more selected from the group consisting of surfactin, arthrofactin, iturin, and salts thereof are even more preferable, and surfactin or a salt thereof is particularly preferable.

[0014] Surfactin is a natural surfactant containing a cyclic peptide group. Surfactin is an anionic surfactant produced by Bacillus subtilis, and has a hydrophilic part with a cyclic peptide structure consisting of seven amino acids, and a hydrophobic part consisting of a hydrocarbon group. Surfactin is a general term for compounds with different alkyl chain lengths and branching degrees in the hydrocarbon group. A surfactin salt is a compound represented by the general formula (I) or a composition containing two or more of these compounds.

[0015] [ka] (wherein X represents an amino acid residue selected from leucine, isoleucine, and valine; R 1represents a linear or branched monovalent saturated hydrocarbon group having 9 to 18 carbon atoms, L-Leu represents L-leucine, D-Leu represents D-leucine, L-Val represents L-valine, M + represents an alkali metal ion or a quaternary ammonium ion.

[0016] X is an amino acid residue selected from leucine, isoleucine, and valine, preferably leucine. The amino acid residue represented by X may be in the L- or D-form, with the L-form being preferred.

[0017] R 1 represents a linear or branched monovalent saturated hydrocarbon group having 9 to 18 carbon atoms. For example, it is an alkyl group, an aryl group, or an aralkyl group having 9 to 18 carbon atoms. Specifically, examples of the alkyl group include n-nonyl, 6-methyloctyl, 7-methyloctyl, n-decyl, 8-methylnonyl, n-undecyl, 9-methyldecyl, n-dodecyl, 10-methylundecyl, n-tridecyl, 11-methyldodecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, and n-octadecyl. Particularly preferred are nonyl, decyl, undecyl, and dodecyl groups each having 9 to 12 carbon atoms.

[0018] The alkali metal ion is not particularly limited, but examples thereof include lithium ion, sodium ion, potassium ion, etc., with sodium ion being preferred.

[0019] Examples of the substituent of the quaternary ammonium ion include organic groups such as alkyl groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, and tert-butyl, aralkyl groups such as benzyl, methylbenzyl, and phenylethyl, and aryl groups such as phenyl, toluyl, and xylyl. Examples of the quaternary ammonium ion include tetramethylammonium ion, tetraethylammonium ion, and pyridinium ion.

[0020] In the salt of surfactin shown in the above formula (I), the amino acid residue is leucine, R 1 is preferably a branched hydrocarbon chain having 12 carbon atoms, and the alkali metal ion is more preferably a sodium ion. For example, "Kaneka Surfactin" manufactured by Kaneka Corporation can be used. In particular, surfactin Na, which is a sodium salt of surfactin, is preferred in that it has a very low critical micelle concentration of 0.0003 wt % and therefore is easy to improve emulsion stability.

[0021] Arthrofactin is represented by the general formula (II).

[0022] [ka] (In the formula, L-Leu represents L-leucine, D-Leu represents D-leucine, L-Ile represents L-isoleucine, D-Ser represents D-serine, D-Thr represents D-threonine, L-Asp represents L-aspartic acid, and D-Asp represents D-aspartic acid.)

[0023] Arthrofactin has one D-aspartic acid and one L-aspartic acid in its structure, and may form a salt with an alkali metal ion such as a lithium ion, a sodium ion, or a potassium ion, or a quaternary ammonium ion.

[0024] Iturin is represented by the general formula (III).

[0025] [ka] (In the formula, R 2indicates an alkyl group having 9 to 18 carbon atoms, L-Asn indicates L-asparagine, D-Asn indicates D-asparagine, D-Tyr indicates D-tyrosine, L-Gln indicates L-glutamine, L-Pro indicates L-proline, and L-Ser indicates L-serine.)

[0026] R 2 represents an alkyl group having 9 to 18 carbon atoms, for example, -(CH2) 10 CH3, -(CH2)8CH(CH3)CH2CH3, -(CH2)9CH(CH3)2.

[0027] The biosurfactants or salts thereof can be used alone or in combination of two or more kinds.

[0028] The biosurfactant or its salt can be separated from the culture medium by culturing a microorganism that produces the desired biosurfactant according to a known method, and can be used either in the form of a purified product or in the form of an unpurified culture medium, for example. For example, a strain belonging to Bacillus subtilis can be mentioned as a microorganism that produces surfactin. Biosurfactants obtained by chemical synthesis can also be used in the same way.

[0029] The content of the biosurfactant in the concentrate composition is 0.05% by mass to 5.0% by mass, preferably 0.08% by mass to 4.0% by mass, more preferably 0.1% by mass to 3.0% by mass, even more preferably 0.2% by mass to 2.0% by mass, and even more preferably 0.3% by mass to 1.2% by mass. When the content of the biosurfactant is within the above range, a foam that is high in viscosity, hard, and highly stable can be formed.

[0030] The content of the biosurfactant in the foamable aerosol composition is preferably 0.04% by mass to 4.6% by mass, more preferably 0.07% by mass to 3.7% by mass, even more preferably 0.09% by mass to 2.8% by mass, and even more preferably 0.18% by mass to 1.9% by mass.

[0031] [Oily ingredients] The concentrate composition in the foamable aerosol composition contains an oily component. The oily component is not particularly limited, and any known oily component that is insoluble in water (phase-separates from water) can be widely used. "Insoluble in water" refers to, for example, a solubility of 1.0 g or less in 100 g of water at 25°C. Specific examples include the following. vegetable fats such as apricot kernel oil, camellia oil, argan oil, soybean oil, olive oil, castor oil, coconut oil, palm oil, palm kernel oil, sesame oil, jojoba oil, cottonseed oil, rapeseed oil, linseed oil, rosehip oil, sunflower oil, essential oils, avocado oil, almond oil, rice bran oil, safflower oil, corn oil, grapeseed oil, coconut oil, Argania spinosa kernel oil, wheat germ oil, rice germ oil, kukui nut oil, crambe abyssinica seed oil, hemp seed oil, peanut oil, camellia oil, evening primrose oil, pistachio oil, macadamia nut oil, meadowhoo oil, cocoa butter, shea butter, and japan wax; Animal fats and oils, such as emu oil, horse fat, beef tallow, lard, mutton tallow, mink oil, egg yolk fat, carp fat, tuna fat, and menhaden fat; Hydrocarbon oils such as light isoparaffin, squalane, liquid paraffin, mineral oil, petrolatum, dodecane, tetradecane, ozokerite, microcrystalline wax, isoparaffin, ceresin, α-olefin oligomer, polybutene, hydrogenated polyisoparaffin, limonene, and turpentine; Fatty acids (preferably having 6 to 40 carbon atoms, more preferably having 12 to 30 carbon atoms), such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, behenic acid, oxystearic acid, palmitoleic acid, linoleic acid, linolenic acid, ricinoleic acid, and undecylenic acid; Higher alcohols such as caproyl alcohol, caprylyl alcohol, capryl alcohol, lauryl alcohol, isostearyl alcohol, myristyl alcohol, cetanol, stearyl alcohol, arachyl alcohol, behenyl alcohol, oleyl alcohol, hexyldecanol, octyldodecanol, decyltetradecanol, cholesterol, and phytosterols; Esters of straight-chain fatty acids and lower alcohols, such as isopropyl myristate, isopropyl palmitate, and ethyl oleate, Esters of straight-chain fatty acids and straight-chain higher alcohols, such as hexyl laurate, myristyl myristate, decyl oleate, and stearyl stearate; Esters of straight-chain fatty acids and branched alcohols, such as octyldodecyl myristate, isostearyl palmitate, and ethylhexyl stearate; Esters of branched fatty acids and lower alcohols, such as ethyl isostearate and isopropyl isostearate; Esters of branched fatty acids and linear higher alcohols, such as cetyl ethylhexanoate and hexyl isostearate, Esters of fatty acids and polyhydric alcohols such as PG dicaprylate, triethylhexanoin, and tri(caprylic / capric acid)glyceryl, Esters of branched fatty acids and branched alcohols, such as 2-octyldodecyl neopentanoate and isostearyl isostearate, Esters of hydroxycarboxylic acids and alcohols, such as lauryl lactate, tri-2-ethylhexyl citrate, trioctyldodecyl citrate, and diisostearyl malate; ester oils such as esters of dibasic acids, such as diisopropyl adipate, diethyl sebacate, etc.; Wax esters such as jojoba oil, jojoba butter, carnauba wax, candelilla wax, rice bran wax, shellac, lanolin, beeswax, montan wax, spermaceti, orange roughy oil, sugar cane wax, palm wax, insect wax, and wool wax; Other oily ingredients include ethers of polyhydric alcohols and monohydric alcohols such as chimyl alcohol, batyl alcohol, and selachyl alcohol; batyl isostearate, batyl stearate; silicones such as alkyl-modified polysiloxanes (dimethylpolysiloxanes (dimethicone)), methylphenylpolysiloxanes, and fluorine-modified polysiloxanes; Oil-based active ingredients include UV absorbers (diethylaminohydroxybenzoylhexyl benzoate, ethylhexyl methoxycinnamate, polysilicone-15), DEET, and fragrance. The oily components can be used alone or in combination of two or more.

[0032] The oily component is preferably at least one selected from the group consisting of vegetable oils and fats, animal oils and fats, hydrocarbon oils, fatty acids, higher alcohols, ester oils, wax esters, silicones, and oily active ingredients, and more preferably at least one selected from the group consisting of vegetable oils and fats, hydrocarbon oils, ester oils, and silicones. The oily ingredients consist of apricot kernel oil, olive oil, squalane, mineral oil, isopropyl myristate, tri(caprylic / capric acid)glyceryl, and dimethicone. More preferably, it is at least one selected from the group.

[0033] The content of the oily component in the concentrate composition is 30.0% by mass to 80.0% by mass, preferably 35.0% by mass to 75.0% by mass, more preferably 40.0% by mass to 70.0% by mass, and even more preferably 50.0% by mass to 70.0% by mass. When the content of the oily component is 30.0% by mass or more, the stability of the foam when force is applied is improved. Also, when the content of the oily component is within the above range, it is easy to form a hard and viscous foam, and the stability when force is applied is also easily improved.

[0034] The content of the oily component in the foamable aerosol composition is not particularly limited, but is preferably 27.5% by mass to 74.0% by mass, more preferably 32.0% by mass to 70.0% by mass, and even more preferably 36.5% by mass to 65.0% by mass.

[0035] The concentrate composition in the foamable aerosol composition contains water. The water content in the concentrate composition is not particularly limited, but is preferably 15.0% by mass to 70.0% by mass, more preferably 20.0% by mass to 65.0% by mass, even more preferably 25.0% by mass to 60.0% by mass, and even more preferably 25.0% by mass to 50.0% by mass.

[0036] The water content in the foamable aerosol composition is not particularly limited, but is preferably 13.5% by mass to 64.5% by mass, more preferably 18.0% by mass to 60.0% by mass, and even more preferably 23.0% by mass to 55.5% by mass.

[0037] [Nonionic surfactants with an HLB value of 7.0 or higher] The concentrate composition in the foamable aerosol composition preferably further contains a nonionic surfactant having an HLB value of 7.0 or more. By using a nonionic surfactant having an HLB value of 7.0 or more, it is easy to form a hard and viscous foam, and further, the stability when a force is applied to the foam is improved. In addition, the emulsion stability of the foamable aerosol composition is also easily improved. The HLB value of the nonionic surfactant is preferably 7.0 or more and 20.0 or less, more preferably 8.0 or more and 19.0 or less, and even more preferably 10.0 or more and 18.0 or less.

[0038] HLB stands for Hydrophile-Lipophile Balance, and is a concept that quantifies the balance between the hydrophilic and lipophilic groups of a surfactant. Generally, HLB is expressed as a number within the range of 0 to 20, and the higher the number, the higher the hydrophilicity. The HLB value can be determined by the Griffin method shown in the following formula. HLB value = 20 x (molecular weight of hydrophilic group / total molecular weight) In this disclosure, when the HLB value in a catalogue is available, the catalogue value is used as a priority.

[0039] Nonionic surfactants having an HLB value of 7.0 or more include, but are not limited to, polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene hydrogenated castor oil, and the like.

[0040] Examples of polyoxyethylene alkyl ethers include: POE (4.2) lauryl ether (HLB value 11.5), POE(21) ​​lauryl ether (HLB value 19.0), POE(9) lauryl ether (HLB value 14.5), POE(10) cetyl ether (HLB value 13.5), POE(15) cetyl ether (HLB value 15.5), POE(20) cetyl ether (HLB value 17.0), POE(23) cetyl ether (HLB value 18.0), POE(20) stearyl ether (HLB value 18.0), POE(20) oleyl ether (HLB value 17.0), POE(20) behenyl ether (HLB value 16.5), POE(20) phytosterol ether (HLB value 15.5), POE(30) phytosterol ether (HLB value 18.0), POE(25) phytostanol (HLB value 14.5) and others. Examples of polyoxyethylene sorbitan fatty acid esters include: PEG-20 sorbitan cocoate (HLB 16.9), POE(80) sorbitan monolaurate (HLB value 19.0), POE(20) sorbitan monolaurate (HLB value 16.7), POE(6) sorbitan monolaurate (HLB value 13.3), POE(20) sorbitan monopalmitate (HLB value 15.6), Examples include POE(20) sorbitan monostearate (HLB value 14.9). Examples of polyglycerol fatty acid esters include: Polyglyceryl-2 monolaurate (HLB value 8.5), Polyglyceryl-10 monolaurate (HLB value 15.5), Polyglyceryl-5 trioleate (HLB value 7.1), Polyglyceryl-10 trioleate (HLB value 7.0), Examples include polyglyceryl-6 monolaurate (HLB value 14.5). Examples of polyoxyethylene fatty acid esters include: Monolauric acid POE(10) (HLB value 12.5), Monostearate POE (25) (HLB value 15.0) and the like. Examples of polyoxyethylene hydrogenated castor oil include: POE(40) hydrogenated castor oil (HLB value 12.5), POE(60) hydrogenated castor oil (HLB value 14.0) and others. The nonionic surfactants having an HLB value of 7.0 or more can be used alone or in combination of two or more kinds.

[0041] The nonionic surfactant having an HLB value of 7.0 or more is preferably at least one selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene fatty acid esters, and polyoxyethylene hydrogenated castor oil, and more preferably at least one selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, and polyglycerin fatty acid esters. The alkyl group of the polyoxyethylene alkyl ether preferably has 12 to 18 carbon atoms, and the polyoxyethylene alkyl ether is more preferably at least one selected from the group consisting of polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, and polyoxyethylene stearyl ether. The polyglycerol fatty acid ester is preferably at least one selected from the group consisting of polyglycerol fatty acid monoesters consisting of fatty acids having 12 to 18 carbon atoms and polyglycerol having an average degree of polymerization of 2 to 10, polyglycerol fatty acid diesters consisting of fatty acids having 12 to 18 carbon atoms and polyglycerol having an average degree of polymerization of 2 to 10, and polyglycerol fatty acid triesters consisting of fatty acids having 12 to 18 carbon atoms and polyglycerol having an average degree of polymerization of 2 to 10.

[0042] In addition, nonionic surfactants with an HLB value of 7.0 or more are POE (4.2) lauryl ether More preferably, the glyceryl ether is at least one selected from the group consisting of polyglyceryl-2 monolaurate, polyglyceryl-10 monolaurate, and polyglyceryl-5 trioleate.

[0043] The content of the nonionic surfactant having an HLB value of 7.0 or more in the concentrate composition is not particularly limited, but is preferably 0.05% by mass to 15.0% by mass, more preferably 0.1% by mass to 12.0% by mass, even more preferably 1.0% by mass to 10.0% by mass, and even more preferably 4.0% by mass to 9.0% by mass. When the content of the nonionic surfactant having an HLB value of 7.0 or more is within the above range, it is easy to form a hard and viscous foam, and further, the stability when a force is applied is also easily improved. In addition, the emulsion stability of the foamable aerosol composition is also easily improved.

[0044] The content of the nonionic surfactant in the foamable aerosol composition is not particularly limited, but is preferably 0.04 mass% to 14.0 mass%, more preferably 0.09 mass% to 11.5 mass%, even more preferably 0.9 mass% to 9.5 mass%, and even more preferably 3.5 mass% to 8.5 mass%.

[0045] The mass ratio of the content of the nonionic surfactant having an HLB value of 7.0 or more to the content of the biosurfactant in the foamable aerosol composition (nonionic surfactant having an HLB value of 7.0 or more:biosurfactant) is not particularly limited, but is preferably 10:1 to 1:10, and more preferably 9:1 to 1:9.

[0046] [Other ingredients] The concentrate composition in the foamable aerosol composition may contain a surfactant other than the biosurfactant and the nonionic surfactant having an HLB value of 7.0 or more. Such a surfactant is not particularly limited and may be any of anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants, which may be used alone or in combination of two or more kinds.

[0047] Examples of the anionic surfactant include: Fatty acid salts such as potassium coconut oil fatty acid, potassium laurate, potassium myristate, sodium oleate, and triethanolamine stearate; alkyl sulfates such as potassium lauryl sulfate, sodium lauryl sulfate, triethanolamine lauryl sulfate, and sodium myristyl sulfate; alkyl phosphoric acids and their salts such as lauryl phosphoric acid and sodium lauryl phosphate; polyoxyethylene alkyl ether sulfates such as polyoxyethylene (2) lauryl ether sodium sulfate and polyoxyethylene lauryl ether triethanolamine sulfate; polyoxyethylene alkyl ether phosphates such as polyoxyethylene lauryl ether sodium phosphate; polyoxyethylene (4.5) lauryl ether sodium acetate N-acylamino acid salts such as sodium N-acylglutamate; N-acylmethylamino acid salts such as sodium N-acylmethylalanine, sodium lauroyl methyl taurate, and sodium caproyl methyl taurate; alkyl sulfosuccinates, acyl lactates, α-olefin sulfonates, α-sulfo fatty acid methyl ester salts, alkyl sulfosuccinates, alkanesulfonates, alkene sulfonates, acyl isethionates, alkyl sulfates, alkyl benzene sulfonates, fatty acid alkanolamide sulfates, monoacyl glycerin sulfates, alkyl phosphates, and polyoxyethylene alkyl phenyl ether phosphates.

[0048] Examples of cationic surfactants include: Monoalkyl quaternary ammonium salts such as cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, dipolyoxyethyleneoleylmethylammonium chloride, polyoxyethylenebehenylmethylammonium chloride, behenyltrimethylammonium methylsulfate, stearylhydroxypropyltrimethylammonium chloride, and cetrimonium saccharin; dicocoyldimethylammonium chloride, dialkyl(C12-C18)dimethylammonium chloride, lanolin fatty acid aminopropyl dimethylammonium ethyl sulfate, dicocoylethylhydroxyethylammonium methylsulfate ammonium, coconut oil alkyl PG dimonium chloride phosphate, linoleic acid amidopropyl PG dimonium chloride phosphate and other dialkyl quaternary ammonium salts, trialkyl quaternary ammonium salts, monoalkyl ether type quaternary ammonium salts, fatty acid amidoamine salts, stearamidopropyl dimethylamine, alkylamine salts, dimethylstearamine, POE coconut oil alkylamine, ester-containing tertiary amine salts, arcobel type tertiary amine salts, alkylpyridinium salts, alkylisoquinolium salts, benzethonium chloride, benzalkonium type quaternary ammonium salts, and quaternium-91.

[0049] Examples of nonionic surfactants include: Examples of the glycerin fatty acid ester include propylene glycol stearate (HLB value 3.5), propylene glycol isostearate (HLB value 3.5), and propylene glycol oleate (HLB value 3.5). Examples of the glycerin fatty acid ester include propylene glycol fatty acid esters such as glyceryl myristate (HLB value 3.5), glyceryl stearate (HLB value 1.5 to 4.0), glyceryl isostearate (HLB value 4.0), glyceryl oleate (HLB value 2.5), and glyceryl distearate (HLB value 2.0); Glycerol fatty acid esters such as glyceryl myristate (HLB value 3.5), glyceryl stearate (HLB value 1.5-4.0), glyceryl isostearate (HLB value 4.0), glyceryl oleate (HLB value 2.5), and glyceryl distearate (HLB value 2.0); Sorbitan fatty acid esters such as sorbitan monostearate (HLB value 4.7), sorbitan monoisostearate (HLB value 5.0), sorbitan sesquiisostearate (HLB value 4.5), sorbitan sesquioleate (HLB value 3.7), sorbitan monooleate (HLB value 4.7), and sorbitan trioleate (HLB value 1.7); Polyglyceryl-2 stearate (HLB value 5.0), polyglyceryl-2 oleate (HLB value 5.5), polyglyceryl-2 isostearate (HLB value 5.5), polyglyceryl-2 triisostearate (HLB value 3.0), polyglyceryl-4 stearate (HLB value 6.0), polyglyceryl-4 oleate (HLB value 6.0), polyglyceryl-6 tristearate (HLB value 2.5), polyglyceryl-10 pentastearate (HLB value 3.5), polyglyceryl-10 pentahydroxystearate (HLB value 3.5), polyglyceryl-10 pentaisostearate (HLB value 3.5), polyglyceryl-10 pentaoleate (HLB value 3.5), and other polyglyceryl-10 pentaoleate (HLB value 3.5); Examples of the surfactant include polyoxyethylene hydrogenated castor oil such as PEG-5 hydrogenated castor oil (HLB value 6.0); and nonionic surfactants having an HLB value of less than 7.0.

[0050] Examples of amphoteric surfactants include: Glycine-type amphoteric surfactants such as N-acylamino acid ethyl-N-2-hydroxyethyl glycine salts; aminopropionic acid-type amphoteric surfactants such as sodium lauryl aminopropionate; acetate betaine-type amphoteric surfactants such as lauryl dimethylaminoacetic acid betaine, stearyl betaine, and coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine; alkyl sulfobetaines such as dodecyl aminomethyl dimethyl sulfopropyl betaine and octadecyl aminomethyl dimethyl sulfopropyl betaine; alkyl carboxymethyl hydroxyethyl imidazolium betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazoline-type amphoteric surfactants such as diethyl imidazolinium betaine; amidobetaines such as lauric acid amidopropyl betaine; alkyl amidopropyl betaines such as coconut oil fatty acid amidopropyl betaine and lauric acid amidopropyl betaine; alkyl hydroxysulfobetaines such as lauryl hydroxysulfobetaine; amidosulfobetaines such as fatty acid amidopropyl betaine; sulfobetaine, cocamidopropyl hydroxy amine oxide types such as sultaine, lauryl dimethylamine N-oxide, oleyl dimethylamine N-oxide, and lauramine oxide; and the like.

[0051] Other surfactants include, for example, Examples of the surfactant include silicone-based surfactants such as polyether-modified silicone, amino-modified silicone, and polyglycerin-modified silicone; fluorine-based surfactants; and the like.

[0052] The concentrate composition may contain additives such as active ingredients, fragrances, antioxidants, preservatives, pH adjusters, moisturizers, bactericides, skin protectants (amino acids), vitamins, various extracts, deodorants, coolants, UV absorbers, UV scattering agents, pest repellent ingredients, and others, to the extent that the above effects are not impaired. For example, alcohol may be contained. Specific examples include the following.

[0053] Specifically, for example, the following can be mentioned: Lower alcohols (e.g., aliphatic monohydric alcohols with 1 to 3 carbon atoms, such as ethanol); polyhydric alcohols (e.g., 1,3-butylene glycol, glycerin, etc.); pH adjusters (e.g., citric acid, lactic acid, triethanolamine, KOH, NaOH, etc.); rust inhibitors (e.g., ammonia water, ammonium benzoate, sodium nitrite, etc.); preservatives (e.g., parabens, phenoxyethanol, methyl paraoxybenzoate); urea; minerals such as calcium, iron, sodium, etc.; pigments; colorants; chelating agents such as EDTA-2Na; cooling agents such as menthol and camphor, etc.

[0054] The content of the concentrate composition in the foamable aerosol composition is not particularly limited, but is preferably 85.0% by mass to 99.5% by mass, and more preferably 90.0% by mass to 99.0% by mass.

[0055] [Propellant] The foamable aerosol composition contains a propellant. The propellant is not particularly limited, and any known propellant that can be used in aerosol products can be used. Liquefied gas or compressed gas may be used, or a combination of liquefied gas and compressed gas may be used. The propellant may also function as a foaming agent.

[0056] The liquefied gas is not particularly limited, and examples thereof include hydrocarbons such as propane, butane, or liquefied petroleum gas (LPG) containing these, LNG, and isopentane; organic fluorine compounds such as hydrofluoroolefins and hydrochlorofluoroolefins; and dimethyl ether (DME). The compressed gas is not particularly limited, and examples thereof include carbon dioxide gas, nitrogen gas, nitrous oxide gas, argon, helium, and compressed air. The propellants may be used alone or in combination of two or more kinds.

[0057] The propellant is preferably at least one selected from the group consisting of liquefied petroleum gas, dimethyl ether, isopentane, isobutane and carbon dioxide gas, and is more preferably liquefied petroleum gas.

[0058] The content of the liquefied gas in the foamable aerosol composition is preferably 0.5% by mass to 15.0% by mass, and more preferably 1.0% by mass to 10.0% by mass.

[0059] The foamable aerosol compositions of the present disclosure can be used in a variety of applications, such as for personal, household, and industrial purposes. For human use, examples include body lotions, skin care agents, hair growth agents, massage agents, hair styling agents, hair treatment agents, shampoos, conditioners, makeup cosmetics, repellents, ultraviolet absorbing agents, and ultraviolet scattering agents. For household use, examples include cleaning agents, deodorants, fragrances, disinfectants, insecticides, insect repellents, waterproofing agents, and water repellents. Examples of industrial uses include lubricants, coating agents, adhesives, paints, etc. The foamable aerosol composition of the present disclosure can form elastic foam and provide a bouncy feel, making it suitable for use on the human body, particularly for external use on the skin.

[0060] The foamable aerosol composition preferably forms foam having a first foam hardness of 0.40 N or more, preferably 0.50 N or more, more preferably 0.60 N or more, and more preferably forms foam having a first foam hardness of 0.90 N or less, for example 0.80 N or less, 0.70 N or less. In addition, the foamable aerosol composition preferably forms foam having a third foam hardness of 0.20 N or more, preferably 0.25 N or more, more preferably 0.30 N or more, and even more preferably 0.35 N or more, and preferably forms foam having a third foam hardness of 0.90 N or less, for example, 0.80 N or less, 0.70 N or less, or 0.60 N or less. The first and third foam hardnesses can be adjusted by adjusting the contents of the oily component, biosurfactant, nonionic surfactant with an HLB value of 7.0 or more, etc. in the concentrate composition.

[0061] In the present disclosure, the terms "first foam hardness" and "third foam hardness" refer to the maximum load obtained in the first compression and the maximum load obtained in the third compression, respectively, when the compression of a foam formed by a foamable aerosol composition is repeated three times under the conditions and method described below. Equipment and test conditions Testing machine: Tensilon universal material testing machine (RTC-1250A, manufactured by ORIENTEC) Load cell: UR-25N-D (ORIENTEC) ·Measurement axis: diameter 6.0cm Petri dish: diameter 7.8cm, depth 1.7cm Test speed: 100mm / min · Operating range: 55mm (the measuring shaft moves up and down within 55mm to measure the pushing and pulling loads) · Measurement temperature: 25℃ ○Measurement method (1) A foamable aerosol composition filled in a pressure-resistant container (aerosol glass test bottle, 100 mL) is immersed in a thermostatic bath at 25° C. for 30 minutes or more. (2) The foamable aerosol composition at 25° C. is sprayed into a petri dish using a foam-forming aerosol spout “FD129W“3”” (Mitani Valve Co., Ltd.). (3) After filling the dish with foam, scrape off the excess foam so that the top surface is flat. (4) Set the measuring axis at a height of 50 mm from the top of the dish, which is the starting point of compression. (5) The dish filled with foam is placed under the measuring shaft and compression begins. (6) The maximum load (also called the first foam hardness) obtained when compressing 5 mm from the top surface of the dish (compressing 55 mm from the starting point of compression) is measured, and then the measuring shaft is raised to the starting point of compression. (7) Repeat (4)-(6) three times. (8)(6) Measure the maximum load (also called the third foam hardness) obtained when compressing the petri dish by 5 mm from the top surface.

[0062] The foamable aerosol composition preferably forms foam having a foam hardness retention rate of 50.0% or more, preferably 55.0% or more, and more preferably 60.0% or more, and preferably forms foam having a foam hardness retention rate of 100.0% or less, for example 95.0% or less or 90.0% or less. In the present disclosure, the term "foam hardness retention rate" refers to the ratio (%) of the foam hardness at the third time to the foam hardness at the first time. The foam hardness retention rate can be adjusted by the contents of the oily component, biosurfactant, nonionic surfactant with an HLB value of 7.0 or more, etc. in the concentrate composition.

[0063] The foamable aerosol composition preferably forms foam having a viscosity of 1.8 Pa·s or more, preferably 2.0 Pa·s or more, more preferably 3.0 Pa·s or more, and preferably forms foam having a viscosity of 10.0 Pa·s or less, for example 9.5 Pa·s or less or 9.0 Pa·s or less. The viscosity of the foam can be adjusted by the contents of the oily component, biosurfactant, nonionic surfactant with an HLB value of 7.0 or more, etc. in the concentrate composition.

[0064] Here, the foam viscosity refers to a viscosity measured under the following conditions and method. Equipment and test conditions Testing machine: TVB-10M viscometer (manufactured by Toki Sangyo Co., Ltd.) Rotor: M3 Vial: diameter 4.0cm, depth 12cm Rotation speed: 12 rpm Measurement time: 1 minute ·Measurement temperature: 25℃ ○Measurement method (1) A foamable aerosol composition filled in a pressure-resistant container (aerosol glass test bottle, 100 mL) is immersed in a thermostatic bath at 25° C. for 30 minutes or more. (2) The foamable aerosol composition at 25° C. is sprayed into a vial using a foam-forming aerosol spout “FD129W“3”” (Mitani Valve Co., Ltd.). (3) After filling the vial with foam, scrape off the excess foam so that the top is flat. (4) Place the rotor in the foam-filled vial and allow the foam to fill the rotor. (5) Rotate the rotor and measure the viscosity.

[0065] [Aerosol products] Next, aerosol products will be described. Aerosol products are A container filled with a foamable aerosol composition, and The container has a discharge mechanism for discharging the foamable aerosol composition.

[0066] The discharge mechanism and the container are not particularly limited, and known ones can be used. The container may be any one that can withstand the pressure of the propellant, and known containers made of resin, metal, glass, etc. can be used. A so-called double-structure container may be used in which an inner container is further provided inside the container to separate the propellant and the concentrate composition by the inner container. The discharge mechanism is not particularly limited, and a known one may be used. The discharge mechanism includes, for example, a valve device and an actuator. In addition, a structure for mounting the valve device may be appropriately selected depending on the type of the pressure-resistant container.

[0067] The form of the aerosol product to be sprayed is not particularly limited, but is preferably foam-like. The actuator in the ejection mechanism is not particularly limited, and any known actuator capable of spraying foam-like may be used. For example, a spout shape or a button shape may be used.

[0068] The pressure (gauge pressure) inside the container of the aerosol product is not particularly limited. The propellant may be filled so that the pressure (gauge pressure) inside the container when filled in the aerosol container is, for example, 1 MPa or less at 25°C.

[0069] The method for producing the foamable aerosol composition and the aerosol product is not particularly limited, and known methods can be used. For example, the following method can be mentioned. Water, an oily component, a biosurfactant, and other components as necessary are stirred and mixed, and emulsified as necessary using a rotary homogenizer, a high-pressure homogenizer, or an ultrasonic emulsifier to prepare a concentrate composition, and further a propellant is filled into a container containing the concentrate composition. The aerosol product is obtained by filling the concentrate composition and a propellant into an aerosol container. EXAMPLES

[0070] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the embodiments of the following examples.

[0071] <Examples 1 to 20 and Comparative Examples 1 to 23> According to the formulations (mass%) shown in Tables 1 to 5, the aqueous components and surfactants (biosurfactants, nonionic surfactants, anionic surfactants, and / or naturally derived amphiphilic substances) were heated and dissolved at 80° C. to obtain an aqueous phase, and the oily components were heated and dissolved at 80° C. to obtain an oil phase. The aqueous phase was mixed with a homomixer (HOMOMIXER MARK2 Model 2.5 ( After stirring at 2000 rpm for 3 minutes in a Primix mixer, the oil phase was added while continuing to stir. After the entire oil phase was added, the mixture was stirred at 5000 rpm for 5 minutes to prepare a concentrate composition. Further, a total of 60 g of the obtained concentrate composition and propellant was filled into a pressure-resistant container (aerosol glass test bottle 100 mL) according to the formulation (mass %) shown in each table to prepare a foamable aerosol composition, and each aerosol product was obtained. Note that the values ​​in the tables indicate mass %.

[0072] [Table 1]

[0073] [Table 2]

[0074] [Table 3]

[0075] [Table 4]

[0076] [Table 5]

[0077] In the table, the materials used are as follows: [Oily ingredients] Mineral oil: Carnation (Sonneborn) Isopropyl myristate: Exepar IPM (Kao Corporation) Dimethicone: KF-96L-2CS (Shin-Etsu Chemical Co., Ltd.) Apricot kernel oil: NIKKOL Apricot Kernel Oil (Nikko Chemicals Co., Ltd.) Caprylic / capric triglyceride: Crodamol GTCC (Croda) Olive fruit oil: Cropure (trademark) OL (Croda) Squalane: NIKKOL Sugar Squalane (Nikko Chemicals Co., Ltd.) [Nonionic surfactants] Laureth-4 (also known as POE(4.2) lauryl ether): NIKKOL BL-4.2 (Nikko Chemicals Co., Ltd.) Laureth-21 (also known as POE(21) ​​lauryl ether): NIKKOL BL-21 (Nikko Chemicals Co., Ltd.) Steareth-20 (also known as POE(20) stearyl ether): NIKKOL BS-20 (Nikko Chemicals Co., Ltd.) Ceteth-20 (also known as POE(20) cetyl ether): NIKKOL BC-20 (Nikko Chemicals Co., Ltd.) Polysorbate 20 (also known as PEG-20 sorbitan cocoate): NIKKOL TL-10 (Nikko Chemicals Co., Ltd.) Polyglyceryl-10 monolaurate: NIKKOL Decaglyn 1-L (Nikko Chemicals Co., Ltd.) Polyglyceryl-2 monolaurate: Sunsoft Q-12D-C (Taiyo Kagaku Co., Ltd.) Polyglyceryl-5 trioleate: Sunsoft A-173E (Taiyo Kagaku Co., Ltd.) [Biosurfactant] Surfactin Na: Kaneka Surfactin (Kaneka Corporation) [Anionic surfactants] Sodium lauryl sulfate: Emal 10PT (Kao Corporation) Sodium laureth sulfate: Emal E-27C (Kao Corporation) Laureth-6 carboxylic acid: Kao Akipo RLM-45 (Kao Corporation) Sodium lauroyl aspartate: Aminoformer (registered trademark) FLDS-L (Asahi Kasei Finechem Corporation) TEA-Cocoyl Glutamate: AminoSurfact (registered trademark) ACMT-L (Asahi Kasei Finechem Corporation) Sodium cocoyl glutamate: AminoSurfact (registered trademark) ACDS-L (Asahi Kasei Finechem Corporation) Sodium Methyl Lauroyl Taurate: NIKKOL LMT (Nikko Chemicals Co., Ltd.) Sodium stearoyl glutamate: Amisoft (registered trademark) HS-11P (Ajinomoto Co., Inc.) [Naturally derived amphiphiles] Lauryl carbamate inulin: INUTEC (registered trademark) SL1 (CreaChem BVBA) [Aqueous component] Glycerin: Concentrated glycerin for cosmetics (Kao Corporation) Water: Purified water (Toyo Aerosol Industry Co., Ltd.) [Propellant] LPG (0.49MPa): Liquefied petroleum gas (vapor pressure 0.49MPa at 20℃) LPG (0.39MPa): Liquefied petroleum gas (vapor pressure 0.39MPa at 20℃) DME / LPG0.39MPa=20 / 80: Dimethyl ether / liquefied petroleum gas (vapor pressure 0.39MPa at 20℃) mixed in a mass ratio of 20 / 80 iP / iB=75 / 25: Isopentane / isobutane mixed in a mass ratio of 75 / 25 CO2 (0.5MPa): Carbon dioxide gas. The internal pressure of the product was adjusted to 0.5MPa (25℃).

[0078] The resulting aerosol product was allowed to stand at 25° C. for 24 hours, and then the following evaluations were carried out. The results are shown in the table. <1> Emulsion stability of aerosol products The resulting aerosol product container was shaken up and down 20 times, and then the time from when it was left to stand at 25°C until the liquid in the container separated into two layers was measured and evaluated according to the following criteria. Separation of the upper or lower layer by 5 mm or more was judged as separation. Evaluations of △ or higher were judged as good. ◎: No separation for 10 minutes or more. ○: No separation occurs for 5 minutes or more, but separation occurs in less than 10 minutes. △: No separation for 2 minutes or more, but separation occurs in less than 5 minutes. ×: Separation occurs in less than 2 minutes.

[0079] <2> Foam hardness and stability The foam was compressed three times using a Tensilon universal material testing machine, and the degree to which the maximum load obtained after the third compression was maintained compared to the maximum load obtained after the first compression was tested to evaluate the hardness of the foam. The specific evaluation procedure is as follows. Equipment and test conditions Testing machine: Tensilon universal material testing machine (RTC-1250A, manufactured by ORIENTEC) Load cell: UR-25N-D (ORIENTEC) ·Measurement axis: diameter 6.0cm Petri dish: diameter 7.8cm, depth 1.7cm Test speed: 100mm / min · Operating range: 55mm (the measuring shaft moves up and down within 55mm to measure the pushing and pulling loads) · Measurement temperature: 25℃ ○Measurement method (1) The obtained aerosol product is immersed in a constant temperature bath at 25°C for at least 30 minutes. (2) The aerosol product at 25°C is sprayed into a petri dish using an aerosol spout for foam formation, "FD129W"3" (Mitani Valve Co., Ltd.). (3) After filling the dish with foam, scrape off the excess foam so that the top surface is flat. (4) Set the measuring axis at a height of 50 mm from the top of the dish, which is the starting point of compression. (5) The dish filled with foam is placed under the measuring shaft and compression begins. (6) The maximum load (also called the first foam hardness) obtained when compressing 5 mm from the top surface of the dish (compressing 55 mm from the starting point of compression) is measured, and then the measuring shaft is raised to the starting point of compression. (7) Repeat (4)-(6) three times. (8)(6) Measure the maximum load (also called the third foam hardness) obtained when compressing the petri dish by 5 mm from the top surface. (9) The ratio (%) of the foam hardness measured at the third measurement to the foam hardness measured at the first measurement is calculated, and this is defined as the foam hardness retention rate (%).

[0080] Based on the obtained first foam hardness, third foam hardness, and foam hardness retention rate (%), the foam hardness was evaluated according to the following criteria. In the following criteria, "when no surfactant other than nonionic surfactant is contained" refers to a comparative example in which the surfactants other than nonionic surfactants contained in the product (biosurfactants, anionic surfactants, and naturally derived amphiphilic substances) are replaced with the same amount of nonionic surfactant. Such comparative examples are shown in the "Comparative" column in the table. For example, in the evaluation of Example 1, Comparative Example 1 corresponds to the "Comparative", that is, "when no surfactant other than nonionic surfactant is contained". Foam hardness was judged to be good when rated as ○ or higher. ⊚: The first foam hardness is 0.40 N or more, and is higher than the first foam hardness when no surfactant other than a nonionic surfactant is contained, and the foam hardness retention rate is 60.0% or more. ◯: The first foam hardness is 0.40 N or more, and is higher than the case where no surfactant other than a nonionic surfactant is contained, and the foam hardness retention is 50.0% or more and less than 60.0%. Δ: The first foam hardness was 0.40 N or more and the foam hardness retention rate was 50.0% or more, but the first foam hardness was lower than when no surfactant other than a nonionic surfactant was contained. ▲: The first foam hardness is 0.40 N or more, but the foam hardness retention rate is less than 50.0%. ×: The first foam hardness is less than 0.40 N.

[0081] <3> Viscosity of foam The viscosity of the foam was measured and evaluated. The specific evaluation procedure was as follows. Equipment and test conditions Testing machine: TVB-10M viscometer (manufactured by Toki Sangyo Co., Ltd.) Rotor: M3 Vial: diameter 4.0cm, depth 12cm Rotation speed: 12 rpm Measurement time: 1 minute ·Measurement temperature: 25℃ ○Measurement method (1) The obtained aerosol product is immersed in a constant temperature bath at 25°C for at least 30 minutes. (2) The aerosol product at 25°C is sprayed into a vial using an aerosol spout for foam formation, "FD129W"3" (Mitani Valve Co., Ltd.). (3) After filling the vial with foam, scrape off the excess foam so that the top is flat. (4) Place the rotor in the foam-filled vial and allow the foam to fill the rotor. (5) Rotate the rotor and measure the viscosity.

[0082] The viscosity of the resulting foam was evaluated according to the following criteria. In the following criteria, the "foam viscosity difference" refers to the value obtained by subtracting the foam viscosity in the case where no surfactant other than nonionic surfactant is contained from the foam viscosity in the sample ((foam viscosity in the sample) - (foam viscosity in the case where no surfactant other than nonionic surfactant is contained)). "In the case where no surfactant other than nonionic surfactant is contained" refers to a comparative example in which the surfactant other than nonionic surfactant contained in the product (biosurfactant, anionic surfactant, and naturally derived amphiphilic substance) is replaced with the same amount of nonionic surfactant. Such comparative examples are shown in the "Comparative" column in the table. For example, in the evaluation of Example 1, Comparative Example 1 corresponds to the "comparative", that is, "in the case where no surfactant other than nonionic surfactant is contained", and the foam viscosity difference is (foam viscosity in Example 1) - (foam viscosity in Comparative Example 1). The foam viscosity difference was judged to be good when it was evaluated as ○ or higher. ◎: The foam viscosity difference is 1.0 Pa·s or more. ○: The foam viscosity difference is 0.5 Pa·s or more. ×: The difference in foam viscosity is less than 0.5 Pa·s.

Claims

1. The present invention comprises a concentrate composition containing water, an oil component, and a biosurfactant, and a propellant, The content of the oil component in the concentrate composition is 30.0% by mass to 80.0% by mass, The content of the biosurfactant in the concentrate composition is 0.05% by mass to 5.0% by mass. A foamable aerosol composition.

2. 2. The foamable aerosol composition according to claim 1, wherein the concentrate composition further contains a nonionic surfactant having an HLB value of 7.0 or more.

3. 3. The foamable aerosol composition according to claim 2, wherein the content of said nonionic surfactant in said concentrate composition is 0.05% by mass to 15.0% by mass.

4. 3. The foamable aerosol composition according to claim 2, wherein the mass ratio of the content of the nonionic surfactant to the content of the biosurfactant in the foamable aerosol composition (the nonionic surfactant:the biosurfactant) is 10:1 to 1:

10.

5. 2. The foamable aerosol composition according to claim 1, wherein the biosurfactant is a lipopeptide biosurfactant or a salt thereof.

6. 2. The foamable aerosol composition according to claim 1, wherein the propellant is at least one selected from the group consisting of liquefied petroleum gas, dimethyl ether, isopentane, isobutane and carbon dioxide gas.

7. A container filled with a foamable aerosol composition, and a discharge mechanism provided in the container for discharging the foamable aerosol composition; 1. An aerosol product comprising:

7. An aerosol product, wherein the foamable aerosol composition is the foamable aerosol composition according to any one of claims 1 to 6.

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