Spray composition

Abstract

To provide a spray composition which generates a low spraying noise, can spray a soft mist and has excellent stability in spite of using carbon dioxide gas.SOLUTION: There is provided a spray composition which comprises a stock solution containing water and a surfactant, and carbon dioxide gas, wherein the surfactant includes at least one selected from the group consisting of (A) alkyl glucoside, (B) a polyoxyethylene-polyoxypropylene alkyl ether having an average addition mole number of ethylene oxide of 1 to 12, (C) a decaglycerol fatty acid ester in which the fatty acid has a branched structure, (D) hexaglycerol fatty acid ester, (E) a polyoxyethylene sorbitan fatty acid ester, (F) polyoxyethylene alkyl (12-14) ether and (G) an alkyl ammonium salt.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a spraying composition. More specifically, the present invention relates to a spraying composition that, despite using carbon dioxide gas, produces a small spraying sound, can be sprayed in a soft mist, and has excellent stability.

Background Art

[0002] Conventionally, spraying compositions for spraying contents in a mist form have been known. When a spraying composition is sprayed on a user's face, arm, etc., it is preferably sprayed in a soft mist. Patent Documents 1 to 2 disclose spraying compositions and spraying products that contain water and a surfactant and are sprayed with nitrogen gas.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventions described in Patent Documents 1 to 2 use nitrogen gas. On the other hand, when carbon dioxide gas is used instead of nitrogen gas, the amount of carbon dioxide gas dissolved in water is larger compared to nitrogen gas. Therefore, the resulting spraying composition has poor stability, such as a change in pH to the acidic side and precipitation of the contents. In addition, when a spraying composition in which carbon dioxide gas is dissolved is sprayed, the dissolved carbon dioxide gas instantly vaporizes, making the spraying force likely to be strong and generating a large spraying sound.

[0005] The present invention has been made in view of such conventional problems, and an object thereof is to provide a spraying composition that, despite using carbon dioxide gas, produces a small spraying sound, can be sprayed in a soft mist, and has excellent stability. [Means for solving the problem]

[0006] The present invention, which solves the above problems, mainly includes the following configuration.

[0007] (1) A spray composition comprising a stock solution containing water and a surfactant, and carbon dioxide, wherein the surfactant comprises at least one selected from the group consisting of (A) alkyl glucoside, (B) polyoxyethylene polyoxypropylene alkyl ether having an average number of moles of ethylene oxide added of 1 to 12, (C) decaglycerin fatty acid ester having a branched fatty acid structure, (D) hexaglycerin fatty acid ester, (E) polyoxyethylene sorbitan fatty acid ester, (F) polyoxyethylene alkyl (12 to 14) ether, and (G) alkylammonium salt.

[0008] With this configuration, the spray composition can produce a low spraying noise despite using carbon dioxide. Furthermore, the spray composition is atomized in a soft mist. In addition, despite the presence of dissolved carbon dioxide, the spray composition is less prone to precipitate formation and exhibits excellent stability.

[0009] (2) The spray composition according to (1), wherein the alkyl glucoside comprises coconut oil alkyl glucoside, myristyl glucoside, and (C12-20) alkyl glucoside.

[0010] With this configuration, the spray composition can produce less noise despite using carbon dioxide. Furthermore, the spray composition is atomized into a softer mist. In addition, despite the presence of some dissolved carbon dioxide, the spray composition is less prone to precipitate formation and exhibits superior stability. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a spray composition that, despite using carbon dioxide, produces a low spraying noise, can be sprayed in a soft mist, and has excellent stability. [Modes for carrying out the invention]

[0012] <Spray composition> A spray composition according to one embodiment of the present invention consists of a stock solution containing water and a surfactant, and carbon dioxide. The surfactant includes at least one selected from the group consisting of (A) alkyl glucoside, (B) polyoxyethylene polyoxypropylene alkyl ether having an average number of moles of ethylene oxide added of 1 to 12, (C) decaglycerin fatty acid ester having a branched fatty acid structure, (D) hexaglycerin fatty acid ester, (E) polyoxyethylene sorbitan fatty acid ester, (F) polyoxyethylene alkyl (12-14) ether, and (G) alkylammonium salt. Each of these will be described below.

[0013] (Undiluted) The undiluted solution contains water and a surfactant.

[0014] ·water Water is the main component of the stock solution, and when a surfactant is added, it becomes semi-transparent to cloudy. When the spray composition is sprayed, the carbon dioxide dissolved in the stock solution vaporizes, forming fine particles and creating a soft mist.

[0015] The type of water is not particularly limited. For example, the water could be purified water, deionized water, or deep-sea water.

[0016] The water content is not particularly limited. For example, the water content is preferably 75% by mass or more, and more preferably 80% by mass or more, in the undiluted solution. Furthermore, the water content is preferably 99.98% by mass or less, and more preferably 99.96% by mass or less, in the undiluted solution. When the water content is within the above range, the spray composition is less likely to produce a loud spraying sound and is easily sprayed in a soft mist. In addition, the spray composition can be easily made to contain active ingredients, etc., as needed.

[0017] • Surfactants The surfactant is added to water, which is the main component of the stock solution. When the surfactant is added to the stock solution, micelles are formed and it becomes semi-transparent to cloudy. In a spray composition filled with carbon dioxide, even if some of the carbon dioxide dissolves in the stock solution (saturation dissolution), the micelles are maintained and it remains semi-transparent to cloudy, making it stable and less prone to crystallization-induced precipitates or deposits. Furthermore, because the spray composition contains a surfactant, it produces a quiet spray sound and easily sprays in a soft mist, despite using carbon dioxide.

[0018] The surfactant of this embodiment includes at least one selected from the group consisting of (A) alkyl glucoside, (B) polyoxyethylene polyoxypropylene alkyl ether having an average number of moles of ethylene oxide added of 1 to 12, (C) decaglycerin fatty acid ester having a branched fatty acid structure, (D) hexaglycerin fatty acid ester, (E) polyoxyethylene sorbitan fatty acid ester, (F) polyoxyethylene alkyl (12-14) ether, and (G) alkylammonium salt.

[0019] (A) The alkyl glucoside is not particularly limited. For example, the alkyl glucoside may be coconut oil alkyl glucoside, myristyl glucoside, cetearyl glucoside, arachidyl glucoside, (C12-20) alkyl glucoside, etc. Among these, the alkyl glucoside is preferably coconut oil alkyl glucoside, myristyl glucoside, and (C12-20) alkyl glucoside, and more preferably contains coconut oil alkyl glucoside. Thereby, although the composition for spraying uses carbon dioxide gas, the spraying sound can be made smaller. In addition, the composition for spraying is sprayed in a softer mist form. Furthermore, although a part of the carbon dioxide gas is dissolved, the composition for spraying is less likely to generate precipitates and has excellent stability.

[0020] (B) The polyoxyethylene (POE)·polyoxypropylene (POP) alkyl ether in which the average number of added moles of ethylene oxide (EO) is 1 to 12 is not particularly limited. For example, the POE·POP alkyl ether in which EO is 1 to 12 may be POE(1)POP(4) cetyl ether, POE(10)POP(4) cetyl ether, POE(12)POP(6) decyltetradecyl ether, etc. Among these, the POE·POP alkyl ether in which EO is 1 to 12 is preferably POE(1)POP(4) cetyl ether and POE(12)POP(6) decyltetradecyl ether.

[0021] (C) The decaglycerin fatty acid ester in which the fatty acid has a branched structure is not particularly limited. For example, the decaglycerin fatty acid ester in which the fatty acid has a branched structure may be decaglyceryl monoisostearate, decaglyceryl diisostearate, etc. Among these, the decaglycerin fatty acid ester in which the fatty acid has a branched structure is preferably decaglyceryl monoisostearate.

[0022] (D) Hexaglycerin fatty acid ester is not particularly limited. For example, (D) hexaglycerin fatty acid ester includes hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, etc. Among these, hexaglycerin fatty acid ester is preferably hexaglyceryl monomyristate.

[0023] (E) Polyoxyethylene sorbitan fatty acid ester is not particularly limited. For example, (E) polyoxyethylene sorbitan fatty acid ester includes POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monooleate, POE sorbitan tristearate, POE sorbitan triisostearate, POE sorbitan trioleate, etc. Among these, polyoxyethylene sorbitan fatty acid ester is preferably POE sorbitan tristearate.

[0024] (F) Polyoxyethylene alkyl (12 - 14) ether is not particularly limited. For example, (F) polyoxyethylene alkyl (12 - 14) ether includes polyoxyethylene alkyl (12 - 14) ether (3 E.O.), polyoxyethylene alkyl (12 - 14) ether (5 E.O.), polyoxyethylene alkyl (12 - 14) ether (7 E.O.), polyoxyethylene alkyl (12 - 14) ether (9 E.O.), polyoxyethylene alkyl (12 - 14) ether (12 E.O.), etc. Among these, polyoxyethylene alkyl (12 - 14) ether is preferably polyoxyethylene alkyl (12 - 14) ether (5 E.O.).

[0025] (G) The alkylammonium salt is not particularly limited. For example, (G) alkylammonium salts include benzalkonium chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, behentrimonium methosulfate, isoalkyl(C10~40)amidopropylethyldimonium ethosulfate, etc. Among these, the alkylammonium salt is preferably distearyldimethylammonium chloride, behentrimonium methosulfate, or isoalkyl(C10~40)amidopropylethyldimonium ethosulfate.

[0026] The surfactant content is not particularly limited. For example, the surfactant content is preferably 0.01% by mass or more, and more preferably 0.02% by mass or more, in the stock solution. Furthermore, the surfactant content is preferably 3% by mass or less, and more preferably 2% by mass or less, in the stock solution. When the surfactant content is within the above range, the stock solution becomes semi-transparent to cloudy. In addition, micelles can be formed even in a spray composition in which carbon dioxide is saturated and dissolved in this stock solution, and the semi-transparent to cloudy state is easily maintained. As a result, when the spray composition is sprayed, the spraying sound is reduced and it is easily sprayed in a soft mist. Furthermore, the spray composition is less prone to precipitation and has excellent stability.

[0027] The undiluted solution may contain water and the above-mentioned surfactant, as well as other surfactants, alcohol, active ingredients, water-soluble polymers, oils, etc.

[0028] Other surfactants may include other nonionic surfactants, anionic surfactants, amphoteric surfactants, silicone-based surfactants, etc., as long as they do not affect the spray state and do not reduce stability.

[0029] Other nonionic surfactants include, for example, fatty acid alkanolamides such as coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, and lauric acid diethanolamide; polyoxyethylene alkyl ethers such as POE cetyl ether, POE stearyl ether, POE oleyl ether, POE lauryl ether, POE behenyl ether, POE octyldodecyl ether, POE isocetyl ether, and POE isostearyl ether; polyethylene glycol fatty acid esters such as polyethylene glycol monostearate; polyoxyethylene hydrogenated castor oil such as POE hydrogenated castor oil; and polyoxyethylene glyceryl monostearate such as POE glyceryl monooleate. Phosphorus fatty acid esters; polyoxyethylene alkyl ether fatty acid esters such as POE cetyl ether stearate and POE lauryl ether isostearate; polyoxyethylene sorbitan fatty acid esters such as POE sorbitan monolaurate, POE sorbitan tetrastearate, and POE sorbitan tetraoleate; and decaglycerin fatty acid esters in which the fatty acid is linear, such as pentaglyceryl monolaurate, pentaglyceryl monomyristate, pentaglyceryl monooleate, pentaglyceryl monostearate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monooleate, and decaglyceryl monolinoleate.

[0030] Examples of anionic surfactants include alkyl phosphates such as potassium lauryl phosphate and sodium lauryl phosphate; polyoxyethylene alkyl ether phosphates such as sodium POE lauryl ether phosphate; alkyl sulfates such as ammonium lauryl sulfate, potassium lauryl sulfate, sodium lauryl sulfate, triethanolamine lauryl sulfate, and sodium cetyl sulfate; polyoxyethylene alkyl ether sulfates such as sodium POE lauryl ether sulfate, triethanolamine POE lauryl ether sulfate, sodium POE alkyl ether sulfate, and triethanolamine POE alkyl ether sulfate; alkyl ether carboxylates such as potassium POE lauryl ether acetate and sodium POE lauryl ether acetate; and sulfonates such as sodium lauryl sulfoacetate, sodium tetradecenesulfonate, sodium dioctyl sulfosuccinate, and sodium dodecylbenzenesulfonate. Furthermore, these include N-acyl glutamates such as N-coconut oil fatty acid acyl-L-glutamate triethanolamine, N-coconut oil fatty acid acyl-L-glutamate potassium, N-coconut oil fatty acid acyl-L-glutamate sodium, N-lauroyl-L-glutamate triethanolamine, N-lauroyl-L-glutamate potassium, N-lauroyl-L-glutamate sodium, N-myristoyl-L-glutamate potassium, N-myristoyl-L-glutamate sodium, and N-stearoyl-L-glutamate sodium; N-acylglycine salts such as N-coconut oil fatty acid acylglycine potassium and N-coconut oil fatty acid acylglycine sodium; N-acylalanine salts such as N-coconut oil fatty acid acyl-DL-alanine triethanolamine; and amino acid-type surfactants such as lauroyl methylalanine sodium.

[0031] Amphoteric surfactants include, for example, alkyl betaines such as lauryldimethylaminoacetic acid betaine (lauryl betaine), stearyl betaine, lauric acid amidopropyl betaine, lauryl hydroxysulfobetaine, and stearyldimethylaminoacetic acid betaine; betaine types such as fatty acid amidopropyl betaines such as coconut oil fatty acid amidopropyl betaine, coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine (cocamidopropyl betaine), and cocamidopropyl hydroxysultaine; alkylimidazole types such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine; amino acid types such as sodium lauroyl glutamate, potassium lauroyl glutamate, and lauroyl methyl-β-alanine; and amine oxide types such as lauryldimethylamine N-oxide and oleyldimethylamine N-oxide.

[0032] Examples of silicone-based surfactants include polyoxyethylene-methylpolysiloxane copolymer, polyoxypropylene-methylpolysiloxane copolymer, and poly(oxyethylene-oxypropylene)-methylpolysiloxane copolymer.

[0033] If other surfactants are included, the content of these other surfactants is preferably 0.01% by mass or more, and more preferably 0.02% by mass or more, in the undiluted solution. Furthermore, the content of these other surfactants is preferably 2% by mass or less, and more preferably 1% by mass or less, in the undiluted solution. By keeping the content of these other surfactants within the above range, the spray composition will provide the effects of the other surfactants while being less prone to precipitation due to carbon dioxide.

[0034] Alcohol is used as a solubilizer for active ingredients that are insoluble in water, and to adjust the drying time on the applied surface, among other purposes.

[0035] Alcohols are not particularly limited. For example, alcohols include monohydric alcohols with 2 to 3 carbon atoms, such as ethanol and isopropanol, and dihydric to tetrahydric polyhydric alcohols, such as propylene glycol, 1,3-butylene glycol, hexylene glycol, glycerin, dipropylene glycol, and diglycerin.

[0036] When alcohol is included, the alcohol content is not particularly limited. For example, the alcohol content is preferably 0.01% by mass or more, and more preferably 0.02% by mass or more, in the undiluted solution. Furthermore, the alcohol content is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution. When the alcohol content is within the above range, the spray composition tends to have a semi-transparent to cloudy appearance in the undiluted solution while still providing the effects of alcohol. In addition, despite containing carbon dioxide, the spray composition produces little noise and tends to be sprayed in a soft mist.

[0037] The active ingredients are not particularly limited. For example, active ingredients include humectants such as sorbitol, collagen, hyaluronic acid, carotenoid acid, sodium lactate, dl-pyrrolidone carboxylate, keratin, casein, lecithin, and urea; cooling agents such as l-menthol, camphor, and peppermint oil; retinol, retinyl acetate, retinyl palmitate, calcium pantothenate, magnesium ascorbate phosphate, sodium ascorbate, dl-α-tocopherol, tocopherol acetate, tocopherol, tocopherol nicotinate, dibenzoylthiamine, riboflavin, and Vitamins such as mixtures of these; antioxidants such as ascorbic acid, α-tocopherol, dibutylhydroxytoluene, and butylhydroxyanisole; amino acids such as glycine, alanine, leucine, serine, tryptophan, cysteine, methionine, aspartic acid, glutamic acid, and arginine; preservatives such as sodium benzoate, parahydroxybenzoic acid esters, and phenoxyethanol; disinfectants such as benzethonium chloride, chlorhexidine chloride, and parachlormethacresol; royal jelly extract, peony extract, and loofah extract. Extracts such as rose extract, lemon extract, aloe extract, calamus root extract, eucalyptus extract, sage extract, tea extract, seaweed extract, placenta extract, and silk extract; astringents such as allantoin hydroxyaluminum, tannic acid, citric acid, and lactic acid; anti-inflammatory agents such as allantoin, glycyrrhetinic acid, dipotassium glycyrrhizate, and azulene; oral preparations such as sodium saccharin and sodium dihydrogen phosphate; methacrylate lauryl acid, methyl benzoate, methyl phenylacetate, geranyl chloride, and acetophosphate myristate Deodorants such as benzyl acetate, benzyl propionate, and green tea extract; UV absorbers such as diethylamino hydroxybenzoyl hexyl benzoate, 2-ethylhexyl paramethoxycinnamate, ethylhexyl triazone, oxybenzone, hydroxybenzophenone sulfonic acid, sodium dihydroxybenzophenone sulfonate, and dihydroxybenzophenone; UV scattering agents such as zinc oxide, titanium dioxide, and octyltrimethoxysilane-coated titanium dioxide; whitening agents such as arbutin and kojic acid; and various fragrances such as natural and synthetic fragrances.

[0038] When an active ingredient is present, the amount of the active ingredient is not particularly limited. For example, the amount of the active ingredient is preferably 0.01% by mass or more, and more preferably 0.02% by mass or more, in the undiluted solution. Furthermore, the amount of the active ingredient is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution. When the amount of the active ingredient is within the above range, the spray composition is more likely to produce the effects of the active ingredient. In addition, despite containing carbon dioxide, the spray composition is easily sprayed in a soft mist.

[0039] Water-soluble polymers are used to adjust the viscosity of the stock solution and to control the spraying state, such as the size and spread of the sprayed particles.

[0040] Water-soluble polymers are not particularly limited. For example, water-soluble polymers include cellulosic polysaccharides such as hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, and sodium carboxymethylcellulose; gums such as carrageenan, xanthan gum, acacia gum, tragacanth gum, cationized guar gum, guar gum, gellan gum, and locust bean gum; and gelatin, dextran, sodium carboxymethyldextran, dextrin, pectin, starch, corn starch, wheat starch, sodium alginate, modified potato starch, hyaluronic acid, sodium hyaluronate, polyvinyl alcohol, polyvinylpyrrolidone, and carboxyvinyl polymer.

[0041] When a water-soluble polymer is included, the amount of the water-soluble polymer is not particularly limited. For example, the amount of water-soluble polymer in the undiluted solution is preferably 0.01% by mass or more, and more preferably 0.02% by mass or more. Furthermore, the amount of water-soluble polymer in the undiluted solution is preferably 2% by mass or less, and more preferably 1% by mass or less. When the amount of water-soluble polymer is within the above range, the spray composition easily exhibits the effects of the water-soluble polymer. In addition, despite containing carbon dioxide, the spray composition is easily sprayed in a soft mist.

[0042] Oils are used to adjust the suspension state of the undiluted solution to control the spray pattern, improve slipperiness on the application surface, improve combability, increase moisture retention, and add shine.

[0043] The oils are not particularly limited. For example, oils include hydrocarbon oils such as liquid paraffin, squalene, squalane, and isoparaffin; ester oils such as isopropyl myristate, isopropyl palmitate, cetyl octanoate, octyldodecyl myristate, decyl oleate, cetyl lactate, isocetyl stearate, cetostearyl alcohol, diisobutyl adipate, diisopropyl sebacate, diethoxyethyl succinate, and diisostearyl malate; methylpolysiloxane, octamethylcyclotetrasiloxane, decate These include silicone oils such as methylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, and methylphenylpolysiloxane; higher alcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and lanolin alcohol; liquid fatty acids such as isostearic acid; and oils and fats such as avocado oil, macadamia nut oil, shea butter, olive oil, and camellia oil.

[0044] When an oily agent is included, the amount of oily agent is not particularly limited. For example, the amount of oily agent is preferably 0.01% by mass or more, and more preferably 0.02% by mass or more, in the undiluted solution. Furthermore, the amount of oily agent is preferably 10% by mass or less, and more preferably 8% by mass or less, in the undiluted solution. When the amount of oily agent is within the above range, the spray composition readily provides the effect of the oily agent and the undiluted solution is less likely to separate.

[0045] The method for preparing the stock solution is not particularly limited. For example, the stock solution can be prepared by adding a surfactant and appropriate active ingredients to water, mixing them, and allowing micelles to form due to the surfactant, thereby creating a semi-transparent to cloudy state.

[0046] (Carbon dioxide) A predetermined amount of carbon dioxide is filled into the aerosol container. Some of the carbon dioxide dissolves in the stock solution and reaches a saturated state (pressure equilibrium), while the remaining carbon dioxide that does not dissolve in the stock solution forms the gas phase within the aerosol container. The carbon dioxide in the gas phase pressurizes the stock solution and acts as a propellant to spray the atomizing composition to the outside.

[0047] The amount of carbon dioxide to be filled is not particularly limited. For example, it is preferable to fill the aerosol container with carbon dioxide so that the pressure inside the container is 0.4 to 1 MPa at 25°C, and more preferably 0.5 to 0.8 MPa. By keeping the pressure within the above range, the spray composition is easily sprayed in a mist even when the remaining amount is low. In addition, the spray composition is less likely to dissolve in excess carbon dioxide and less likely to precipitate. Furthermore, the spray composition is less likely to produce a loud spraying sound and is easily sprayed in a soft mist.

[0048] In addition to carbon dioxide, the atomizing composition of this embodiment may also contain other compressed gases such as nitrogen gas, compressed air, oxygen gas, and nitrous oxide.

[0049] The method for preparing the spray composition is not particularly limited. For example, the spray composition can be prepared by filling a container with a stock solution, attaching a valve to the container, filling it with carbon dioxide through the valve, and allowing a portion of the carbon dioxide to saturate and dissolve in the stock solution. As the carbon dioxide saturates and dissolves in the stock solution, the pH of the spray composition changes to the acidic side, but by using the specific surfactant of this embodiment, the micelle state can be maintained. As a result, the spray composition becomes a soft spray state and achieves stability without the formation of precipitates or deposits.

[0050] The container body is a cylindrical container with a closed bottom, into which the spray composition is filled. A valve is attached to the opening of the container body.

[0051] The material of the container body is not particularly limited. For example, the material of the container body may be metal such as aluminum or tinplate, various synthetic resins, pressure-resistant glass, etc.

[0052] A valve is a component used to close and seal the opening of a container body. The valve primarily comprises a housing held in a mounting cup fitted to the opening of the container body, a stem with a stem hole connecting the inside and outside of the container body, and a stem rubber attached around the stem hole to close it. The housing contains the stem, the stem rubber, and a spring that biases the stem upward. A spray member for spraying the atomizing composition is attached to the upper end of the stem.

[0053] The spraying member is a component for spraying a spray composition by operating the opening and closing of a valve, and is attached to the upper end of the stem. The spraying member mainly comprises a nozzle portion with spray holes formed therein and an operating portion operated by the user with their fingers or the like. The spray composition is sprayed from the spray holes. The number and shape of the spray holes are not particularly limited. There may be multiple spray holes. The shape of the spray holes may be approximately circular, approximately angular, etc.

[0054] In this embodiment of the spray product, when the spray member is pressed down, the valve stem is pressed down. This causes the stem rubber to bend downward, opening the stem hole. As a result, the inside and outside of the container body are connected. When the inside and outside of the container body are connected, the pressure difference between the inside and outside of the container body draws the spray composition into the housing, which then passes through the stem hole and the internal stem passage, is sent to the spray member, and is subsequently sprayed from the spray hole. [Examples]

[0055] The present invention will be described more specifically below with reference to examples. The present invention is not limited in any way to these examples.

[0056] (Example 1) Stock solution 1 was prepared according to the formulation (unit: mass%) shown in Table 1 below. 60 g of stock solution 1 was filled into a transparent glass pressure vessel, a valve was attached to the vessel, and carbon dioxide gas was injected through the valve to prepare the spray composition by saturated dissolving the carbon dioxide gas in the stock solution. The equilibrium pressure at 25°C was 0.6 MPa.

[0057] [Table 1]

[0058] (Example 2) The spray composition was prepared in the same manner as in Example 1, except that stock solution 2 listed in Table 1 was used.

[0059] (Example 3) The spray composition was prepared in the same manner as in Example 1, except that stock solution 3 listed in Table 1 was used.

[0060] (Example 4) The spray composition was prepared in the same manner as in Example 1, except that stock solution 4 listed in Table 1 was used.

[0061] (Example 5) The spray composition was prepared in the same manner as in Example 1, except that stock solution 5 listed in Table 1 was used.

[0062] (Example 6) The spray composition was prepared in the same manner as in Example 1, except that stock solution 6 listed in Table 1 was used.

[0063] (Example 7) The spray composition was prepared in the same manner as in Example 1, except that stock solution 7 listed in Table 1 was used.

[0064] (Example 8) The spray composition was prepared in the same manner as in Example 1, except that stock solution 8 listed in Table 1 was used.

[0065] (Example 9) The spray composition was prepared in the same manner as in Example 1, except that stock solution 9 listed in Table 1 was used.

[0066] (Example 10) A spray composition was prepared in the same manner as in Example 1, except that the stock solution 10 listed in Table 1 was used.

[0067] (Example 11) A spray composition was prepared in the same manner as in Example 1, except that the stock solution 11 listed in Table 1 was used.

[0068] (Example 12) A spray composition was prepared in the same manner as in Example 1, except that the stock solution 12 listed in Table 1 was used.

[0069] (Comparative Example 1) A spray composition was prepared in the same manner as in Example 1, except that stock solution 13 listed in Table 1 was used.

[0070] The spray compositions prepared in Examples 1-12 and Comparative Example 1 were evaluated for appearance, spray sound, spray spread, spray force, and stability using the following evaluation methods. The results are shown in Table 2.

[0071] 1. Appearance of the spray composition A pressure-resistant container filled with the spray composition was immersed in a constant-temperature water bath at 25°C for one hour, and the appearance of the spray composition was visually evaluated. (Evaluation Criteria) ○: The spray composition showed no precipitates or sediments. △: The spray composition contained slight precipitates or sediments. ×: The spray composition contained precipitates or sediments.

[0072] 2. Spray sound A spray button (with a 0.3mm diameter nozzle and a mechanical break-up mechanism) was attached to the valve, and the spray sound produced when the spray composition was sprayed was evaluated. (Evaluation Criteria) ○: The spraying noise was quieter than that of the spraying composition in Comparative Example 1. ×: The spray noise was loud, similar to that of the spray composition in Comparative Example 1.

[0073] 3. Spray spread The mist spread (spray pattern) when the spray composition was sprayed was evaluated. (Evaluation Criteria) ○: The spray pattern spread over a wider area than that of the spray composition in Comparative Example 1. △: The spray pattern was slightly wider than that of the spray composition in Comparative Example 1. ×: The spray pattern was similar to that of the spray composition in Comparative Example 1.

[0074] 4. Spray force The force of the mist produced when the spray composition was sprayed was evaluated. (Evaluation Criteria) ○: The mist was sprayed in a softer mist form than that of the spray composition in Comparative Example 1. △: The mist was sprayed in a slightly softer mist than that of the spray composition in Comparative Example 1. ×: The mist was sprayed with the same force as the spray composition in Comparative Example 1.

[0075] 5. Stability of the spray composition A pressure-resistant container filled with the spray composition was stored in a constant temperature room at 45°C for one year, and the evaluations described in items 1 to 4 above were performed.

[0076] [Table 2]

[0077] As shown in Table 2, the spray compositions of Examples 1 to 12, despite using carbon dioxide, did not produce precipitates or sediments, produced a quiet spray, and sprayed in a soft mist. Furthermore, the spray compositions of Examples 1, 2, 5 to 8, and 12 showed similar results after one year, demonstrating excellent stability. In addition, the spray compositions of Examples 3, 4, and 9 to 11 showed slight changes in spray force and spread after one year compared to immediately after preparation, but this did not pose any problems for use. On the other hand, the spray composition of Comparative Example 1, which does not contain the surfactant of the present invention, produced a loud spray sound and sprayed vigorously both immediately after preparation and after one year.

[0078] (Comparative Example 2) A spray composition was prepared in the same manner as in Example 1, except that stock solution 14 listed in Table 3 was used.

[0079] (Comparative Example 3) A spray composition was prepared in the same manner as in Example 1, except that stock solution 15 listed in Table 3 was used.

[0080] (Comparative Example 4) A spray composition was prepared in the same manner as in Example 1, except that stock solution 16 listed in Table 3 was used.

[0081] (Comparative Example 5) A spray composition was prepared in the same manner as in Example 1, except that stock solution 17 listed in Table 3 was used.

[0082] (Comparative Example 6) A spray composition was prepared in the same manner as in Example 1, except that stock solution 18 listed in Table 3 was used.

[0083] (Comparative Example 7) A spray composition was prepared in the same manner as in Example 1, except that stock solution 19 listed in Table 3 was used.

[0084] (Comparative Example 8) The spray composition was prepared in the same manner as in Example 1, except that the stock solution 20 listed in Table 3 was used.

[0085] [Table 3]

[0086] The spray compositions prepared in Comparative Examples 2 to 8 were evaluated for appearance, spray sound, spray spread, spray force, and stability using the evaluation method described above. The results are shown in Table 4.

[0087] [Table 4]

[0088] As shown in Table 4, the spray composition of Comparative Example 2, which used polyoxyethylene / polyoxypropylene alkyl ether with an average number of added moles of ethylene oxide exceeding the range of the present invention, produced a loud spraying sound, could not be sprayed in a soft mist, and had a strong spray force. The spray composition of Comparative Example 3 had poor stability and produced precipitates. The spray compositions of Comparative Examples 4 and 5, which used decaglycerin fatty acid esters with non-branched fatty acids, had poor stability, produced precipitates, produced a loud spraying sound after long-term storage, could not be sprayed in a soft mist, and sprayed with force. The spray composition of Comparative Example 6, which used decaglycerin fatty acid esters with non-branched fatty acids, had poor stability. The spray composition of Comparative Example 7, which used polyoxyethylene glycerin fatty acid esters, had poor stability. The spray composition of Comparative Example 8, which used polyethylene glycol fatty acid esters, had poor stability and produced precipitates.

[0089] <Product Example 1 (Spray product for moisturizing lotion)> (Undiluted solution 21) Coconut oil alkyl glucoside / coconut alcohol (*1) 0.1 Glycerin (*20) 2.0 Hyaluronic acid (*21) 0.1 Methylparaben (*22) 0.1 Purified water 97.7 Total 100.0 (mass%) *20: Concentrated glycerin for cosmetics (product name), manufactured by Kao Corporation. *21: Hyalo-Oligo (product name), manufactured by Kewpie Corporation *22: Mekkins M (product name), manufactured by Ueno Pharmaceutical Co., Ltd.

[0090] The stock solution 21 described above was prepared. 60 g of stock solution 21 was filled into a transparent glass pressure vessel, a valve was attached to the pressure vessel, and carbon dioxide gas was filled through the valve to saturated dissolve the carbon dioxide gas in the stock solution to prepare the spray composition. The equilibrium pressure at 25°C was 0.6 MPa.

[0091] <Product Example 2 (Spray product for cooling lotion)> (Undiluted solution 22) Coconut oil alkyl glucoside / cetearyl alcohol (*2) 0.1 Menthol (*23) 0.1 Ethanol 2.0 Methylparaben (*22) 0.1 Purified water 97.7 Total 100.0 (mass%) *23: L-menthol (product name), manufactured by Suzuki Usage Co., Ltd.

[0092] The stock solution 22 described above was prepared. 60 g of the stock solution 22 was filled into a transparent glass pressure vessel, a valve was attached to the pressure vessel, and carbon dioxide gas was filled through the valve to saturated dissolve the carbon dioxide gas in the stock solution and prepare the spray composition. The equilibrium pressure at 25°C was 0.6 MPa.

[0093] <Product Example 3 (Astringent Lotion Spray Product)> (Undiluted solution 23) Myristyl glucoside / myristyl alcohol (*3) 0.05 Citric acid (*24) 0.1 Zinc paraphenolsulfonate (*25) 0.2 Sorbitol (*26) 0.5 Glycerin (*20) 1.0 Methylparaben (*22) 0.1 Purified water 98.05 Total 100.0 (mass%) *24: Purified citric acid (crystal) M (product name), manufactured by Fuso Chemical Industries, Ltd. *25: Sulfo-coal zinc (product name), manufactured by Matsumoto Koshō Co., Ltd. *26: Solville Kao (product name), manufactured by Kao Corporation

[0094] The stock solution 23 described above was prepared. 60 g of stock solution 23 was filled into a transparent glass pressure vessel, a valve was attached to the pressure vessel, and carbon dioxide gas was filled through the valve to saturated dissolve the carbon dioxide gas in the stock solution and prepare the spray composition. The equilibrium pressure at 25°C was 0.6 MPa.

[0095] <Product Example 4 (Spray product for mouthwash)> (Undiluted solution 24) (C12-20) Alkyl glucoside / (C14-22) Alcohol (*4) 0.05 Glycerin (*20) 3.00 Sodium saccharin (*27) 0.15 Ethanol 5.00 Sodium benzoate (*28) 0.05 Sodium dihydrogen phosphate (*29) 0.10 Purified water 91.65 Total 100.00 (mass%) *27: Sodium Saccharine (trade name), manufactured by IMCD Benelux BV. *28: Sodium Benzoate (trade name), manufactured by IMCD Benelux BV. *29: Sodium dihydrogen phosphate (product name), manufactured by Yoneyama Pharmaceutical Co., Ltd.

[0096] The stock solution 24 described above was prepared. 60 g of stock solution 24 was filled into a transparent glass pressure vessel, a valve was attached to the pressure vessel, and carbon dioxide gas was filled through the valve to saturated dissolve the carbon dioxide gas in the stock solution and prepare the spray composition. The equilibrium pressure at 25°C was 0.6 MPa.

[0097] Table 5

Claims

1. It consists of a stock solution containing water and a surfactant, and carbon dioxide. The surfactant comprises at least one selected from the group consisting of (A) alkyl glucoside, (C) decaglycerin fatty acid ester having a branched fatty acid structure, (D) hexaglycerin fatty acid ester, (E) polyoxyethylene sorbitan fatty acid ester, and (F) polyoxyethylene alkyl (12-14) ether. The carbon dioxide gas is filled into the aerosol container so that the pressure inside the container is 0.4 to 1 MPa at 25°C, in a spray composition.

2. The spray composition according to claim 1, wherein the surfactant comprises at least one of (A) an alkyl glucoside or (F) a polyoxyethylene alkyl (12-14) ether.

3. The spray composition according to claim 1 or 2, wherein the alkyl glucoside comprises coconut oil alkyl glucoside, myristyl glucoside, and (C12-20) alkyl glucoside.

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