Post-foaming aerosol composition and aerosol product

Abstract

To provide a post-foaming aerosol composition, substantially free of soap, which has excellent handleability during stock solution preparation, forms a gel having high viscosity upon mixing the stock solution and a foaming agent, exhibits excellent gel retention even after discharge, and undergoes gradual foaming.SOLUTION: A post-foaming aerosol composition comprises a stock solution composition containing water, an alkyl ether carboxylate, and a nonionic surfactant, and a foaming agent, wherein a content of the alkyl ether carboxylate in the stock solution composition is 7.0 mass% or more and 25.0 mass% or less, and a total content of the alkyl ether carboxylate and the nonionic surfactant in the stock solution composition is 18.0 mass% or more and 57.0 mass% or less, and the composition is substantially free of soap.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present disclosure relates to post-foaming aerosol compositions and aerosol products. [Background technology]

[0002] Post-foaming formulations have a unique feel when used; they foam after being discharged in a gel form, and then change into a dense foam, and are therefore widely used in body cosmetics such as body soaps and shaving agents. Post-foaming formulations mainly consist of a concentrate and a foaming agent, and are thickened (gelled) by mixing the foaming agent with the concentrate, and the foaming agent is stably dissolved or dispersed in the concentrate. When the post-foaming formulation is discharged from the container, the foaming agent gradually vaporizes and post-foams. As a base material for the concentrate of the post-foaming preparation, soap has been widely used from the viewpoint that it can easily form a gel by dissolving a foaming agent. For example, Patent Document 1 discloses a shaving composition containing water, a water-soluble soap, a volatile self-foaming agent, about 0.0005 to 0.5% by weight of a fluorosurfactant, and hydrogenated polyisobutene. In addition, a method has been used in which a foaming agent is stabilized with a water-soluble polymer and dispersed in a concentrate. For example, Patent Document 2 discloses a post-foaming type hair dye composition containing hydroxyethyl cellulose in the concentrate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 06-509319 [Patent Document 2] JP 2017-095373 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, soap, which is often used in post-foaming preparations, is thought to cause squeaking when used on hair, for example, and in recent years, the diversification of consumer needs has led to a demand for the development of formulations that do not use soap. Also, as in Patent Document 2, when a water-soluble polymer such as hydroxyethyl cellulose is used, the concentrate thickens due to the water-soluble polymer, making it difficult to ensure the handleability during preparation of the concentrate. Therefore, the present disclosure provides a post-foaming aerosol composition that is substantially free of soap, has excellent handling properties when preparing a concentrate, forms a highly viscous gel when the concentrate and a foaming agent are mixed, has excellent gel retention properties even after being ejected, and gradually foams. [Means for solving the problem]

[0005] The present disclosure includes the following aspects. [1] A post-foaming aerosol composition comprising a concentrate composition containing water, an alkyl ether carboxylate, and a nonionic surfactant, and a foaming agent, The content of the alkyl ether carboxylate in the concentrate composition is 7.0% by mass or more and 25.0% by mass or less, the total content of the alkyl ether carboxylate and the nonionic surfactant in the concentrate composition is 18.0% by mass or more and 57.0% by mass or less; A post-foaming aerosol composition that is substantially free of soap. [2] The post-foaming aerosol composition according to [1], wherein the concentrate composition further contains an oily component. [3] The post-foaming aerosol composition according to [1] or [2], wherein the alkyl ether carboxylate is polyoxyethylene lauryl ether carboxylate. [4] The nonionic surfactant is a polyoxyethylene sorbitan fatty acid ester, a poly The post-foaming aerosol composition according to any one of [1] to [3], which is at least one selected from the group consisting of oxyethylene alkyl ethers, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyglycerin fatty acid esters, alkyl glucosides, and fatty acid alkylol amides. [5] The post-foaming aerosol composition according to any one of [1] to [4], wherein the content of the nonionic surfactant in the concentrate composition is 0.1% by mass to 48.0% by mass. [6] The post-foaming aerosol composition according to any one of [1] to [5], which is for use on the human body. [7] A container filled with a post-foaming aerosol composition, and a discharge mechanism for discharging the foamable aerosol composition; 1. An aerosol product comprising: The post-foaming aerosol composition according to any one of [1] to [6] above is an aerosol product. [8] An aerosol product comprising: an inner container filled with a post-foaming aerosol composition is housed in an outer container, and a propellant is filled in a space formed between the inside of the outer container and the inner container; The post-foaming aerosol composition according to any one of [1] to [6], wherein the post-foaming aerosol composition is an aerosol product equipped with a discharge mechanism. Effect of the Invention

[0006] According to the present disclosure, it is possible to provide a post-foaming aerosol composition which is substantially free of soap, has excellent handling properties when preparing a concentrate, forms a gel having high viscosity when the concentrate and a foaming agent are mixed, has excellent gel retention properties even after being ejected, and gradually foams. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] The expressions "XX to YY" or "XX to YY" representing a numerical range mean a numerical range including the endpoints, that is, the lower limit and the upper limit, unless otherwise specified. When numerical ranges are stated in stages, the upper and lower limits of each numerical range can be combined in any way.

[0008] In this disclosure, "soap" refers to an alkaline salt of a higher fatty acid produced by combining both a higher fatty acid and an alkaline agent. Specific examples of higher fatty acids include stearic acid, palmitic acid, myristic acid, lauric acid, coconut oil fatty acid, and oleic acid. Examples of the alkaline agent include alkaline agents commonly used in soaps, such as potassium hydroxide, sodium hydroxide, aminomethylpropanol, diisopropanolamine, diethanolamine, and triisopropanolamine.

[0009] The post-foaming aerosol composition is substantially free of soap. In the present disclosure, "substantially free of soap" means that soap is not intentionally added to the post-foaming aerosol composition, and may contain a small amount of soap that is inevitably mixed in during the production of the post-foaming aerosol composition. For example, soap that is associated with the blended components and is contained in the post-foaming aerosol composition in an amount less than that at which the effect is exerted (so-called carry-over component) may be contained. For example, the content of soap in the post-foaming aerosol composition is less than 0.1% by mass, preferably 0.05% by mass or less, more preferably 0.01% by mass or less, even more preferably 0.001% by mass or less, and particularly preferably 0% by mass. Furthermore, typically, when producing a composition containing soap, a higher fatty acid and an alkaline agent are blended in the formulation to form the soap, but in the present disclosure, "substantially free of soap" refers not only to substantially free of alkali salts of higher fatty acids, but also to substantially free of combinations of higher fatty acids and alkaline agents that could form soap.

[0010] Each component used in the post-foaming aerosol composition will now be described. The post-foaming aerosol composition comprises a concentrate composition and a foaming agent. The concentrate composition comprises water. The content of water in the concentrate composition is not particularly limited, and can be appropriately selected taking into consideration the purpose of the post-foamable aerosol composition. The content of water in the concentrate composition is preferably 30.0% by mass to 99.0% by mass, more preferably 35.0% by mass to 95.0% by mass, and even more preferably 38.0% by mass. % to 90.0% by mass, and even more preferably 40.0% to 85.0% by mass.

[0011] The concentrate composition contains an alkyl ether carboxylate. The alkyl ether carboxylate is a type of anionic surfactant. By using the alkyl ether carboxylate in combination with a nonionic surfactant described later, the concentrate composition before the addition of the foaming agent can maintain high fluidity, so that the handleability during preparation of the concentrate composition is improved. In addition, by mixing the concentrate composition and the foaming agent, the viscosity increases, and a post-foaming formulation having excellent gel retention performance even after being discharged can be obtained.

[0012] The alkyl ether carboxylate is not particularly limited, and examples thereof include polyoxyethylene alkyl ether carboxylates such as sodium polyoxyethylene lauryl ether carboxylate, sodium polyoxyethylene tridecyl ether carboxylate, and sodium polyoxyethylene myristyl ether carboxylate. The polyoxyethylene alkyl ether carboxylate preferably has 8 to 20 carbon atoms in the alkyl group, more preferably 10 to 14, and the average number of moles of ethylene oxide added is preferably 2 to 18, more preferably 3 to 14, and even more preferably 4.5 to 10. Examples of the alkyl ether carboxylate include alkali metal salts, alkaline earth metal salts, triethanolamine salts, and ammonium salts of alkyl ether carboxylates, and alkali metal salts such as sodium salts and potassium salts, and triethanolamine salts are preferred, with sodium salts and triethanolamine salts being more preferred. Among these, the polyoxyethylene alkyl ether carboxylate is preferably polyoxyethylene lauryl ether carboxylate, more preferably at least one selected from the group consisting of POE(4.5) lauryl ether carboxylate and POE(10) lauryl ether carboxylate, and even more preferably at least one selected from the group consisting of POE(4.5) lauryl ether sodium acetate, POE(10) lauryl ether sodium acetate, and POE(10) lauryl ether acetate triethanolamine salt. The alkyl ether carboxylates may be used alone or in combination of two or more.

[0013] The concentrate composition may contain the alkyl ether carboxylate itself, or the alkyl ether carboxylate may be formed in the concentrate composition by blending an alkyl ether carboxylic acid and an alkaline agent (e.g., triethanolamine, potassium hydroxide, sodium hydroxide, ammonia, etc.).

[0014] The content of the alkyl ether carboxylate in the concentrate composition is 7.0% by mass or more, preferably 8.0% by mass or more, more preferably 10.0% by mass or more, and even more preferably 15.0% by mass or more. Also, the content is 25.0% by mass or less, preferably 22.0% by mass or less, and more preferably 20.0% by mass or less.

[0015] The concentrate composition contains a nonionic surfactant. The nonionic surfactant interacts with the anionic surfactant, which facilitates the formation of a gel when the concentrate composition and the foaming agent are mixed. It is possible.

[0016] The nonionic surfactant is not particularly limited, but examples thereof include: Polyoxyethylene sorbitan fatty acid esters such as POE(20) sorbitan monolaurate, POE(20) sorbitan monopalmitate, POE(20) sorbitan monostearate, POE(6) sorbitan monooleate, POE(20) sorbitan monooleate, POE(6) sorbitan monostearate, POE(20) sorbitan monoisostearate, POE(20) sorbitan tristearate, and POE(20) sorbitan trioleate; Polyethylene glycol fatty acid esters, such as POE(10) monostearate, POE(25) monostearate, POE(40) monostearate, POE(55) monostearate, POE(10) monolaurate, POE(10) monooleate, PEG-20 sorbitan cocoate; Polyoxyethylene alkyl ethers such as POE(4.2) lauryl ether, POE(21) ​​lauryl ether, POE(9) lauryl ether, POE(2) cetyl ether, POE(10) cetyl ether, POE(15) cetyl ether, POE(20) cetyl ether, POE(25) cetyl ether, POE(7) oleyl ether, POE(10) oleyl ether, POE(15) oleyl ether, POE(20) oleyl ether, POE(50) oleyl ether, POE(10) behenyl ether, POE(20) behenyl ether, POE(30) behenyl ether, POE(20) stearyl ether, and POE alkyl(12-14) ether; POE(20) POP(4) polyoxyethylene polyoxypropylene alkyl ethers such as cetyl ether; Polyoxyethylene sorbitol fatty acid esters such as POE(30) sorbitol tetraoleate, POE(60) sorbitol tetraoleate, POE(60) sorbitol tetrastearate, POE(6) sorbitol monolaurate, and POE(6) sorbitol tetraoleate; Polyoxyethylene glycerin fatty acid esters, such as POE(5) glyceryl monostearate, POE(15) glyceryl monostearate, POE(15) glyceryl monooleate, and PEG-7 glyceryl cocoate; Polyoxyethylene castor oils such as POE(40) castor oil, POE(20) hydrogenated castor oil, POE(40) hydrogenated castor oil (PEG-40 hydrogenated castor oil), POE(50) hydrogenated castor oil, POE(60) castor oil, POE(60) hydrogenated castor oil, POE(80) hydrogenated castor oil, and POE(100) hydrogenated castor oil; Polyoxyethylene lanolin alcohols, such as POE(10) lanolin alcohol, POE(20) lanolin alcohol, and POE(40) lanolin alcohol; Sorbitan fatty acid esters such as sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquistearate, sorbitan monooleate, sorbitan sesquioleate, and sorbitan trioleate; Glycerol fatty acid esters such as glyceryl monostearate and glyceryl monomyristate; diglycerol fatty acid esters such as diglyceryl monostearate, diglyceryl monooleate, diglyceryl monoisostearate; triglycerol fatty acid esters such as triglyceryl monolaurate, triglyceryl monomyristate, triglyceryl monooleate, triglyceryl monostearate; tetraglycerol fatty acid esters such as tetraglyceryl monostearate, tetraglyceryl monooleate; pentaglycerol fatty acid esters such as pentaglyceryl trimyristate, pentaglyceryl trioleate; hexaglycerol fatty acid esters such as hexaglyceryl monooleate, hexaglyceryl monostearate, hexaglyceryl tristearate; and decaglyceryl monostearate, decaglyceryl distearate, decaglyceryl diisostearate. decaglyceryl fatty acid esters such as decaglyceryl monooleate, decaglyceryl dioleate, decaglyceryl tristearate, decaglyceryl trioleate, decaglyceryl pentaoleate, decaglyceryl monolaurate; polyglycerol fatty acid esters such as decaglyceryl monooleate, decaglyceryl dioleate, decaglyceryl tristearate, decaglyceryl trioleate, decaglyceryl pentaoleate, decaglyceryl monolaurate; Polyoxyethylene polyoxypropylene alkyl ethers such as POE(20)POP(8) cetyl ether and POE(30)POP(6) decyl tetradecyl ether; Alkyl glucosides such as decyl glucoside and lauryl glucoside; Fatty acid alkylolamides such as coconut oil fatty acid diethanolamide, coconut oil fatty acid N-methylethanolamide, coconut oil fatty acid monoethanolamide; Alkyl dimethylamine oxide liquids such as lauryl dimethylamine oxide liquid; Polyoxyalkylene sterols such as PEG-5 phytosterol, PEG-30 phytosterol; Polyoxyethylene lanolins such as PEG-10 lanolin, PEG-30 lanolin; Lanolin alcohols, such as POE(40) lanolin alcohol; Examples include beeswax derivatives such as POE(6) sorbitol beeswax and POE(20) sorbitol beeswax. The nonionic surfactant may be used alone or in combination of two or more kinds.

[0017] The nonionic surfactant is preferably at least one selected from the group consisting of polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene sorbit fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyglycerin fatty acid esters, alkyl glucosides, and fatty acid alkylol amides.

[0018] The polyoxyethylene sorbitan fatty acid ester is preferably polyoxyethylene sorbitan laurate. The average number of moles of ethylene oxide added in the polyoxyethylene sorbitan fatty acid ester is preferably 15 to 25, more preferably 17 to 23, and among these, POE(20) sorbitan monolaurate is even more preferable. The polyoxyethylene alkyl ether is preferably polyoxyethylene lauryl ether. The average number of moles of ethylene oxide added in the polyoxyethylene alkyl ether is preferably 3 to 10, more preferably 4 to 9, and among these, at least one selected from the group consisting of POE(4.2) lauryl ether, POE(9) lauryl ether, and POE alkyl(12-14) ether is even more preferable. The polyoxyethylene sorbitol fatty acid ester is preferably a polyoxyethylene sorbitol oleate ester. The average number of moles of ethylene oxide added in the polyoxyethylene sorbitol fatty acid ester is preferably 25 to 65, more preferably 30 to 60, and among these, at least one selected from the group consisting of POE(30) sorbitol tetraoleate and POE(60) sorbitol tetraoleate is even more preferable. The polyoxyethylene glycerin fatty acid ester is preferably a polyoxyethylene glycerin coconut oil fatty acid ester. The average number of moles of ethylene oxide added in the polyoxyethylene glycerin fatty acid ester is preferably 5 to 10, and among these, coconut oil fatty acid PEG-7 glyceryl is more preferable. stomach. The polyglycerol fatty acid ester is preferably polyglycerol oleate or polyglycerol laurate. The average polymerization degree of glycerin in the polyglycerol fatty acid ester is preferably 8 to 12, more preferably 9 to 11. Among them, at least one selected from decaglycerol oleate and decaglycerol laurate is preferred, and at least one selected from the group consisting of decaglyceryl monooleate, decaglyceryl pentaoleate, and decaglyceryl monolaurate is more preferred. The alkyl glucoside is preferably decyl glucoside. As the fatty acid alkylolamide, coconut oil fatty acid alkylolamide is preferred, and coconut oil fatty acid N-methylethanolamide is more preferred.

[0019] The content of the nonionic surfactant in the concentrate composition is not particularly limited, and can be appropriately selected taking into consideration the purpose of the post-foaming aerosol composition. The content of the nonionic surfactant in the concentrate composition is preferably 0.1% by mass to 48.0% by mass, more preferably 0.5% by mass to 45% by mass, even more preferably 3.0% by mass to 30.0% by mass, and even more preferably 4.0% by mass to 20.0% by mass.

[0020] The total content of the alkyl ether carboxylate and the nonionic surfactant in the concentrate composition is 18.0% by mass or more, and more preferably 20.0% by mass or more, and is 57.0% by mass or less, and preferably 55.0% by mass or less, and more preferably 50.0% by mass or less.

[0021] The mass ratio of the alkyl ether carboxylate to the nonionic surfactant in the concentrate composition is preferably 0.05 to 60, more preferably 0.1 to 55.0, even more preferably 0.2 to 50.0, and even more preferably 1.0 to 15.0.

[0022] The concentrate composition preferably contains an oily component, which makes it easier to form a hard gel when the concentrate composition and the foaming agent are mixed.

[0023] The oil component is not particularly limited, but examples include the following: Hydrocarbon oils such as squalane, squalene, mineral oil, liquid paraffin, petrolatum, hydrogenated polyisobutene, and heptane; Fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), isostearic acid, and 12-hydroxystearic acid; Vegetable oils such as wheat germ oil, rice germ oil, camellia oil, argan oil, soybean oil, olive oil, castor oil, coconut oil, apricot kernel oil, palm oil, sesame oil, jojoba oil, cottonseed oil, rapeseed oil, linseed oil, rosehip oil, grape oil; Silicone oils such as dimethylpolysiloxane (dimethicone), dodecamethylcyclohexasiloxane, methylhydrogenpolysiloxane, and dimethylsiloxane; Ester oils such as glycerin monostearate, glycerin distearate, isopropyl palmitate, isopropyl stearate, butyl stearate, isopropyl myristate, diisopropyl adipate, decyl isostearate, and triethylhexanoin; Higher alcohols such as behenyl alcohol, cetanol, stearyl alcohol, and isostearyl alcohol; repellent ingredients such as DEET, Icaridin; Ultraviolet absorbers such as diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl methoxycinnamate, oxybenzone-4, octocrellin, ethylhexyl triazone, trisbiphenyl triazine, methylene bisbenzotriazolyl tetramethylbutylphenol, and bisethylhexyloxyphenol methoxyphenyl triazine. The oil component may be used alone or in combination of two or more kinds.

[0024] The oily component is preferably at least one selected from the group consisting of hydrocarbon oils, vegetable oils, silicone oils, and ester oils, and more preferably at least one selected from the group consisting of isopropyl adipate, isopropyl myristate, hydrogenated polyisobutene, dimethicone, and apricot kernel oil.

[0025] The content ratio of the oily component in the concentrate composition is not particularly limited, and can be appropriately selected taking into consideration the purpose of the post-foaming aerosol composition. The content of the oily component in the concentrate composition is preferably 0.05% by mass to 20.0% by mass, more preferably 0.5% by mass to 10.00% by mass, even more preferably 0.8% by mass to 7.0% by mass, and particularly preferably 1.0% by mass to 5.0% by mass.

[0026] The post-foaming aerosol composition contains a foaming agent. The foaming agent is dispersed in the post-foaming aerosol composition while stored in an aerosol container, and gradually vaporizes due to changes in temperature conditions and the like after the post-foaming aerosol composition is discharged from the container, gradually foaming the post-foaming aerosol composition. The foaming agent can also function as a propellant.

[0027] The blowing agent is not particularly limited, but examples thereof include aliphatic hydrocarbons such as propane, n-butane, isobutane, n-pentane, isopentane, and hexane, halogenated hydrocarbons such as trichlorotrifluoroethane and dichlorotetrafluoroethane, organic fluorine compounds such as hydrofluoroolefins, carbon dioxide gas, nitrous oxide gas, compressed gases such as argon and helium, dimethyl ether, diethyl ether, etc. The blowing agent preferably contains at least one selected from the group consisting of isobutane and isopentane. The foaming agent may be used alone or in combination of two or more kinds.

[0028] The content of the foaming agent is not particularly limited and can be appropriately selected taking into consideration the purpose of the post-foaming aerosol composition. The content of the foaming agent in the post-foaming aerosol composition is preferably 15.0% by mass or less, more preferably 10.5% by mass or less, even more preferably 9.0% by mass or less, and even more preferably 8.0% by mass or less. The content of the foaming agent is preferably 0.5% by mass or more, more preferably 1.5% by mass or more, and even more preferably 2.0% by mass or more.

[0029] The post-foaming aerosol composition may further include a propellant other than the foaming agent. The propellant other than the foaming agent is not particularly limited, but examples thereof include compressed gases such as nitrogen gas and compressed air. The propellant may be used alone or in combination of two or more kinds.

[0030] The concentrate composition may contain a thickener, but is preferably substantially free of a thickener. By being substantially free of a thickener, the concentrate composition has an appropriate fluidity, and therefore the handleability during preparation of the concentrate composition is improved. In the present disclosure, "substantially free of thickener" means that no thickener is intentionally added to the concentrate composition, and may contain a small amount of thickener that is inevitably mixed in during the production of the concentrate composition. For example, a thickener that is associated with a blended component and is contained in the concentrate composition in an amount less than that at which the effect is exerted (so-called carry-over component) may be contained. For example, the content of thickener in the concentrate composition is less than 0.1% by mass, preferably 0.05% by mass or less, more preferably 0.01% by mass or less, even more preferably 0.001% by mass or less, and particularly preferably 0.05% by mass or less. Mass percent.

[0031] Examples of thickeners include the following: Cellulosic thickeners such as cellulose gum, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydrophobized hydroxypropylmethylcellulose, sodium cellulose sulfate, and cellulose powder; Polyethylene glycol thickeners such as highly polymerized polyethylene glycol (highly polymerized PEG), polyethylene glycol distearate, (PEG-240 / decyltetradeceth-20 / HDI) copolymer, and glyceryl behenate / polyglyceryl-6 octastearate; Plant-based thickeners such as gum arabic, locust bean gum, tara gum, guar gum, glucomannan, xanthan gum, and pectin; Starch-based thickeners such as starch, carboxymethyl starch, methylhydroxypropyl starch; Seaweed-based thickeners such as sodium alginate, propylene glycol alginate, carrageenan, and agar; Acrylic acid-based polymers such as acrylic acid / alkyl methacrylate copolymers, hydroxyethyl acrylate / acryloyldimethyl taurate copolymers, sodium acrylate / acryloyldimethyl taurate copolymers, polyvinyl alcohol, (PEG-240 / decyltetradeceth-20 / HDI) copolymers, acrylates / alkyl acrylate crosspolymers, (sodium acrylate / acryloyldimethyl taurate / dimethylacrylamide) crosspolymers, polyacrylic acid or salts thereof; Also, vinyl thickeners such as polyvinylpyrrolidone, carboxyvinyl polymer, polyvinyl alcohol, and polyvinyl methyl ether; Mucopolysaccharide thickeners such as hyaluronic acid, hyaluronic acid derivatives and their salts, and sodium chondroitin sulfate; Amino acid-based thickeners such as collagen; Other water-soluble polymers such as polyurethane, dextrin fatty acid ester, dimethyl distearyl ammonium hectorite, (acryloyldimethyltaurate ammonium / vinylpyrrolidone) copolymer, ethylene glycol triisostearate, polyoxyethylene (20) methyl glucoside triisostearate, bentonite, macrogol, dibutyl ethylhexanoyl glutamide, dibutyl lauroyl glutamide, and sodium caseinate.

[0032] The concentrate composition may contain a surfactant other than the alkyl ether carboxylate and the nonionic surfactant to the extent that the above-mentioned effects are not impaired. Examples of such surfactants include anionic surfactants other than the alkyl ether carboxylate, cationic surfactants, and amphoteric surfactants.

[0033] Examples of anionic surfactants other than alkyl ether carboxylates include fatty acid soaps such as potassium coconut oil fatty acid, potassium myristate, and potassium laurate; alkyl sulfates such as potassium lauryl sulfate, sodium lauryl sulfate, triethanolamine lauryl sulfate, and sodium myristyl sulfate; alkyl ether sulfates such as polyoxyethylene alkyl ether sulfates such as sodium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene myristyl ether sulfate, and triethanolamine polyoxyethylene alkyl ether sulfate; alkyl ether phosphates such as lauryl phosphoric acid and polyoxyethylene lauryl ether phosphoric acid; acyl methyl taurate; and sulfonates such as sodium lauryl sulfoacetate.

[0034] The total content of the anionic surfactant in the concentrate composition is preferably 7.0% by mass or more, more preferably 8.0% by mass or more, even more preferably 10.0% by mass or more, and even more preferably 15.0% by mass or more. Also, it is preferably 25.0% by mass or less, more preferably 22.0% by mass or less, and even more preferably 20.0% by mass or less. Here, the term "anionic surfactant" refers to anionic surfactants in general, including alkyl ether carboxylates.

[0035] Examples of cationic surfactants include alkyl ammonium salts such as cetyltrimethylammonium chloride, stearyltrimethylammonium chloride (steartrimonium chloride), behenyltrimethylammonium chloride, lauryltrimethylammonium chloride, and stearoxypropyltrimonium chloride; alkylbenzylammonium salts; stearylamine acetate; polyoxyethylene alkylamines such as polyoxyethylene laurylamine and polyoxyethylene stearylamine; stearamidopropyl dimethylamine; and polyquaternium-10.

[0036] Examples of amphoteric surfactants include alkyl betaines such as lauryl dimethylaminoacetate betaine (lauryl betaine), stearyl betaine, lauric acid amidopropyl betaine, lauryl hydroxysulfobetaine, stearyl dimethylaminoacetate betaine, dodecyl aminomethyl dimethylsulfopropyl betaine, and octadecyl aminomethyl dimethylsulfopropyl betaine, and fatty acid amidopropyl betaines such as coconut acid amidopropyl betaine, coconut oil fatty acid amidopropyl dimethylaminoacetate betaine (cocamidopropyl betaine), and cocamidopropyl hydroxysultaine; alkyl imidazole types such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine; and amine oxide types such as lauryl dimethylamine N-oxide, oleyl dimethylamine N-oxide, and lauramine oxide.

[0037] The total content of the anionic surfactant and the nonionic surfactant in the concentrate composition is preferably 18.0% by mass or more, more preferably 20.0% by mass or more. Also, it is preferably 57.0% by mass or less, more preferably 55.0% by mass or less, and even more preferably 50.0% by mass or less. Here, the term "anionic surfactant" refers to anionic surfactants in general, including alkyl ether carboxylates.

[0038] The concentrate composition may contain optional ingredients such as active ingredients, fragrances, antioxidants, preservatives, pH adjusters, chelating agents, oils and fats, silicones, moisturizers, bactericides, skin protectants, vitamins, various extracts, deodorants and deodorants, cooling agents, UV absorbers, UV scattering agents, pest repellents, insecticides, and others to the extent that the above effects are not impaired. The proportion of the optional ingredients is appropriately determined based on the intended use of the composition, etc.

[0039] Specific examples of optional components include the following: Coolants (menthol, camphor, 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; polyhydric alcohols, etc.

[0040] The post-foaming aerosol composition can be provided as a post-foaming aerosol composition for various uses depending on the type of its compositional components. The post-foaming aerosol composition may be for use on the human body, and examples of the post-foaming aerosol composition for use on the human body include skin external applications such as milky lotion, lotion, beauty essence, makeup base, hair care, foundation, sunscreen, shaving cream, facial cleanser, facial cleanser, face pack, and shower gel, and hair setting agents, hair conditioners, and the like. The post-foaming aerosol composition can be suitably used for hair applications such as toners, hair dyes, etc. The post-foaming aerosol composition is not limited to applications on the human body, but can also be commercialized as insecticides, cleaners, coatings, and other products.

[0041] The pH of the concentrate composition in the post-foaming aerosol composition is not particularly limited, but is preferably 4.0 to 13.0, more preferably 4.5 to 10.0, and even more preferably 5.0 to 8.0. The pH can be measured using a pH meter after adjusting the temperature of the concentrate composition to 20°C. The pH can be adjusted using known pH adjusters, such as potassium hydroxide, sodium hydroxide, triethanolamine, citric acid, sodium citrate, and lactic acid.

[0042] The aerosol product of the present invention comprises a container filled with a post-foaming aerosol composition, and a discharge mechanism for discharging the post-foaming aerosol composition. The discharge mechanism and the container are not particularly limited, and known ones can be used. The discharge mechanism may be provided in a container filled with the post-foamable aerosol composition. The container may be any one that can withstand the pressure of the foaming agent, and known containers made of resin, metal, glass, etc. can be used. The discharge mechanism is not particularly limited, and a known mechanism 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 container. The actuator in the discharge mechanism is not particularly limited and may be any known actuator, for example, a spout-shaped actuator.

[0043] The pressure (gauge pressure) inside the container of the aerosol product is not particularly limited. The post-foaming aerosol composition may be filled in the aerosol container so that the pressure (gauge pressure) inside the inner container at 25° C. is, for example, 1 MPa or less.

[0044] The aerosol product of the present invention is preferably an aerosol product equipped with a discharge mechanism, in which an inner container filled with a post-foaming aerosol composition is stored in an outer container, and a propellant is filled in the space formed between the inside of the outer container and the inner container. Note that the above description of the post-foaming aerosol composition is used for the post-foaming aerosol composition.

[0045] Such a double-structured aerosol product is provided with a discharge mechanism in either the inner container or the outer container, and specifically, for example, the inner container, which is a foldable flexible bag, is sealed to the opening inside the outer container in the discharge mechanism. A space is formed between the outer container and the inner container, and the space is filled with a propellant for discharging the post-foamable aerosol composition from the discharge mechanism. The discharge mechanism has a discharge port for discharging the aerosol composition filled in the inner container, and a flow path to the outside of the inner container is created when the valve is operated. Pressurization of the inner container occurs due to pressure from the propellant disposed between the inner container and the outer container, and the filled aerosol composition is discharged outside the outer container. Such aerosol products are generally called bag-on-valve or bag-in-can. Aerosol products using a bag-on-valve can expel the contents of the bag in the same way from any angle, and can expel about 95% of the contents.

[0046] The propellant in the double-structure aerosol product is not particularly limited, but examples thereof include aliphatic hydrocarbons such as propane, n-butane, isobutane, n-pentane, isopentane, and hexane; halogenated hydrocarbons such as trichlorotrifluoroethane and dichlorotetrafluoroethane; organic fluorine compounds such as hydrofluoroolefins; compressed gases such as carbon dioxide, nitrous oxide, nitrogen gas, argon, helium, and compressed air; dimethyl ether; ether, diethyl ether, etc. The propellant may be used alone or in combination of two or more kinds.

[0047] The methods for producing the concentrate composition, the post-foaming aerosol composition, and the aerosol product are not particularly limited. For example, the following methods can be mentioned. The liquid concentrate composition can be obtained by mixing water, anionic surfactant, nonionic surfactant, and other components as necessary in any ratio. Specifically, for example, first, anionic surfactant, water, and other components as necessary are mixed in any ratio (while heating as necessary) to obtain an anionic surfactant phase. In addition, in a separate container, nonionic surfactant and other components as necessary are mixed in any ratio (while heating as necessary) to obtain a nonionic surfactant phase. Next, the nonionic surfactant phase and the anionic surfactant phase are mixed to obtain a liquid concentrate composition.

[0048] The post-foaming aerosol composition and the aerosol product can be produced, for example, as follows: First, the components are mixed by the above-mentioned method to obtain a concentrate composition. The concentrate composition and the foaming agent obtained are filled into a pressure-resistant container to obtain an aerosol product filled with the post-foaming aerosol composition. EXAMPLES

[0049] The present disclosure will be specifically described below with reference to examples, but the present disclosure is not limited to the aspects of the following examples.

[0050] <Examples 1 to 24 and Comparative Examples 1 to 16> First, an anionic surfactant and water were mixed according to the formulation (mass%) shown in Tables 1 to 3 to obtain an anionic surfactant phase. In order to dissolve the anionic surfactant in the water, the mixture was heated to 80°C as necessary during mixing. In addition, an oily component and a nonionic surfactant were mixed in a separate container according to the formulation (mass%) shown in Tables 1 to 3 to obtain a nonionic surfactant phase. In order to dissolve the nonionic surfactant in the oily component, the mixture was heated to 80°C as necessary during mixing. Next, the obtained nonionic surfactant phase was added to the anionic surfactant phase, mixed, and cooled with cold water to prepare a concentrate composition.

[0051] A total of 40 g of the obtained concentrate composition and foaming agent were filled into a pressure-resistant container (aerosol glass test bottle with valve, 100 mL), shaken and stirred, and then pressurized and degassed using nitrogen gas. A spout (FD129W“3”, manufactured by Mitani Valve Co., Ltd.) was attached to the container, and each aerosol product filled with a foamable aerosol composition was prepared. The mass % of the concentrate composition and the foaming agent in the obtained aerosol products are shown in Tables 1 to 3. The evaluation results of each concentrate composition and aerosol product are also shown in Tables 1 to 3. In the tables, the comparative examples with "-" in the evaluation column indicate that the evaluation was not performed. The evaluation method will be described later.

[0052] [Table 1]

[0053] [Table 2]

[0054] [Table 3]

[0055] The materials used are as follows: [Anionic surfactants] Sodium laureth-6 carboxylate (POE(4.5) sodium lauryl ether acetate): Kao Akipo RLM-45NV (Kao Corporation) Sodium laureth-11 carboxylate (POE(10) sodium lauryl ether acetate): Kao Akipo RLM-100NV (Kao Corporation) Laureth-11 carboxylic acid (POE(10) lauryl ether acetate): Kao Akipo RLM-100 (Kao Corporation) Sodium laureth sulfate: Emal E-27C (Kao Corporation) Sodium myristoyl methyl taurate: NIKKOL MMT (Nikko Chemicals Co., Ltd.) Sodium Methyl Lauroyl Taurate: NIKKOL LMT (Nikko Chemicals Co., Ltd.) Sodium Lauroyl Sarcosine: Soypon (registered trademark) SLE (Kawaken Fine Chemicals Co., Ltd.) NIKKOL OTP-75 (a mixture containing 73-75% sodium di(2-ethylhexyl)sulfosuccinate, 18-21% water, and 6-7% ethanol) (Nikko Chemicals Co., Ltd.) Sodium lauryl sulfoacetate: NIKKOL LSA-F (Nikko Chemicals Co., Ltd.) Sodium lauryl phosphate: NIKKOL SLP-N (Nikko Chemicals Co., Ltd.) Sodium dilaureth-10 phosphate: NIKKOL DLP-10 (Nikko Chemicals Co., Ltd.) Sodium dilaureth-8 phosphate: NIKKOL DOP-8NV (Nikko Chemicals Co., Ltd.) Trilaureth-4 phosphate: NIKKOL TLP-4 (Nikko Chemicals Co., Ltd.) Trioleyl phosphate: NIKKOL TOP-0V (Nikko Chemicals Co., Ltd.) [Alkaline agent] Triethanolamine: Triethanolamine (Ando Parachemie Co., Ltd.) [Nonionic surfactants] (C12-14) Palace-5 (POE alkyl (12-14) ether): NIKKOL BT-5 (Nikko Chemicals Co., Ltd.) Coconut oil fatty acid PEG-7 glyceryl: NIKKOL TEMGCO-7 (Nikko Chemicals Co., Ltd.) Laureth-4 (POE(4.2) Lauryl Ether): NIKKOL BL-4.2 (Nikko Chemicals Co., Ltd.) Cocamide methyl MEA (coconut oil fatty acid N-methylethanolamide): Aminone C-11S (Kao Corporation) Decyl glucoside: Mydol 10 (Kao Corporation) Polysorbate 20 (POE(20) sorbitan monolaurate): Rheodor TW-L120 (Kao Corporation) Sorbeth-30 tetraoleate (POE(30) sorbitol tetraoleate): NIKKOL GO-430NV (Nikko Chemicals Co., Ltd.) Sorbeth-60 tetraoleate (POE(60) sorbitol tetraoleate): NIKKOL GO-460V (Nikko Chemicals Co., Ltd.) Polyglyceryl-10 oleate (decaglyceryl monooleate): NIKKOL Decaglyn 1-0V (Nikko Chemicals Co., Ltd.) Polyglyceryl-10 laurate (decaglyceryl monolaurate): NIKKOL Decaglyn 1-L (Nikko Chemicals Co., Ltd.) Laureth-9 (POE(9) Lauryl Ether): NIKKOL BL-9EX (Nikko Chemicals Co., Ltd.) Polyglyceryl-10 pentaoleate (decaglyceryl pentaoleate): NIKKOL Decaglyn 5-OV (Nikko Chemicals Co., Ltd.) [Oily ingredients] Isopropyl myristate: Exepar IPM (Kao Corporation) Hydrogenated polyisobutene: Pearleem 3 (NOF Corporation) Diisopropyl adipate: NIKKOL DID (Nikko Chemicals Co., Ltd.) Dimethicone: KF-96L-2CS (Shin-Etsu Chemical Co., Ltd.) Apricot kernel oil: NIKKOL Apricot kernel oil (Nikko Chemicals Co., Ltd.) [Other ingredients] Sorbitol: Sorbitol Kao (Kao Corporation) Glycerin: Concentrated glycerin for cosmetics (Kao Corporation) Anhydrous citric acid: Citric acid (anhydrous) (Iwata Chemical Co., Ltd.) Sodium hydroxide: 48% caustic soda (Kaname Chemical Co., Ltd.) (The mass percentages in the table are converted to the amount of solids) [Foaming agent] Isopentane / isobutane = 75 / 25wt%: a mixture of 75% isopentane and 25% isobutane by weight

[0056] The procedures for evaluating the obtained concentrate compositions and aerosol products are as follows.

[0057] (1) pH of the concentrate composition After adjusting the temperature of the concentrate composition to 20° C., the pH of the concentrate composition was measured using a pH meter (HM-30R: Toa Denpa Kogyo Co., Ltd.).

[0058] (2) Fluidity evaluation of the concentrate To evaluate the fluidity of the concentrate, 20 g of the concentrate composition was dispensed into a vial (50 mL) and allowed to stand at room temperature for 24 hours. The vial was then gently inverted 90° and evaluated according to the following criteria. A: When the vial is inverted, it flows immediately and is fluid. B: When the vial is inverted, the liquid begins to flow within 5 seconds and is fluid. C: No flow even after 5 seconds from inverting the vial; no fluidity.

[0059] (3) Evaluation of fluidity of post-foaming aerosol composition The obtained stock solution and the foaming agent were filled into a pressure-resistant container (aerosol glass test bottle 100 mL) in a total of 40 g, shaken and stirred, and then pressurized and defoamed with nitrogen gas after shaking and stirring. After that, it was left to stand at room temperature for 24 hours, and then the pressure-resistant container was gently tilted 90° and evaluated according to the following criteria. A: Even after 5 seconds have passed since the pressure container was tilted, the liquid does not flow and has no fluidity. B: The pressure vessel has enough fluidity that the gas-liquid interface tilts slightly within 5 seconds after it is turned over. C: The liquid does not flow or have any fluidity even after 5 seconds from when the pressure container is inverted, but precipitation and separation are observed. D: When the pressure container is inverted, the liquid flows immediately and is fluid.

[0060] (4) State of post-foaming aerosol composition when discharged The obtained aerosol product was allowed to stand at room temperature for 24 hours, and then 2 g of the post-foaming aerosol composition was expelled from the aerosol product onto the palm of a hand, and the state of the expelled matter was visually observed. A: It is discharged in a gel form and gradually foams up. B: It is discharged in a gel form and foams immediately thereafter. C: Discharge in a foamed state. D: Almost no foaming.

[0061] (5) Gel retention after extrusion To evaluate the gel retention state after ejection, the obtained aerosol product was left to stand at room temperature for 48 hours, and then 2 g of the post-foamable aerosol composition was ejected from the aerosol product in a straight line of a specified length onto a desk. The vertical width of the ejected product immediately after ejection and after being left to stand at room temperature for 3 minutes was measured with a ruler to calculate the expansion rate (the ratio of the vertical width of the ejected product after being left to stand for 3 minutes to the vertical width of the ejected product immediately after ejection), and the evaluation was based on the following criteria. A: Expansion rate is 1.0 to 1.4 times B: Expansion rate is more than 1.4 times and less than 1.7 times C: Expansion rate exceeds 1.7 times

Claims

1. A post-foaming aerosol composition comprising a concentrate composition containing water, an alkyl ether carboxylate, and a nonionic surfactant, and a foaming agent, The content of the alkyl ether carboxylate in the concentrate composition is 7.0% by mass or more and 25.0% by mass or less, the total content of the alkyl ether carboxylate and the nonionic surfactant in the concentrate composition is 18.0% by mass or more and 57.0% by mass or less; A post-foaming aerosol composition that is substantially free of soap.

2. The post-foaming aerosol composition according to claim 1 , wherein the concentrate composition further contains an oily component.

3. 2. The post-foaming aerosol composition of claim 1, wherein said alkyl ether carboxylate is polyoxyethylene lauryl ether carboxylate.

4. 2. The post-foaming aerosol composition according to claim 1, wherein the nonionic surfactant is at least one selected from the group consisting of polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene sorbit fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyglycerin fatty acid esters, alkyl glucosides, and fatty acid alkylol amides.

5. 2. The post-foaming aerosol composition according to claim 1, wherein the content of the nonionic surfactant in the concentrate composition is 0.1% by mass to 48.0% by mass.

6. 2. The post-foaming aerosol composition according to claim 1, which is for use on the human body.

7. a container filled with a post-foaming aerosol composition; and a discharge mechanism for discharging the foamable aerosol composition; 1. An aerosol product comprising: The post-foaming aerosol composition according to any one of claims 1 to 6, wherein the post-foaming aerosol composition is an aerosol product.

8. 1. An aerosol product comprising: an inner container filled with a post-foaming aerosol composition is housed in an outer container, and a propellant is filled in a space formed between the inside of the outer container and the inner container; 7. An aerosol product equipped with a discharge mechanism, wherein the post-foaming aerosol composition is the post-foaming aerosol composition according to any one of claims 1 to 6.

Images