Aerosol composition for forming resin foam

Abstract

To provide aerosol compositions for forming a resin foam that foam when discharged, have a feeling of cooling, can be applied as if rolling when pressed with a fingertip, and form a spherical resin foam with an excellent design.SOLUTION: Provided is an aerosol composition for forming a resin foam, consisting of an undiluted solution and a liquefied gas, the undiluted solution containing a resin, a polyol, water, and a hydrofluoroolefin having a boiling point of 10 to 40°C, and the liquefied gas containing dimethyl ether.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an aerosol composition for forming resin foam. More specifically, the present invention relates to an aerosol composition for forming resin foam that foams when dispensed, provides a cooling sensation, and can be applied in a rolling manner by pressing with a fingertip, thereby forming spherical resin foams with excellent design properties. [Background technology]

[0002] Conventionally, aerosol compositions that cool a target surface and form a film or the like on the target surface when discharged have been known (e.g., Patent Documents 1 and 2). Patent Document 1 discloses a film-forming coolant containing a resin-containing aqueous solution, water, and dimethyl ether. When applied, this film-forming coolant forms a peelable resin film, and volatile components evaporate from the surface and interior of the resin film, cooling the applied area by the latent heat of vaporization. Patent Document 2 discloses an aerosol composition for forming a peelable coating, which contains polyvinyl butyral, a plasticizer, an alcohol, a hydrofluoroolefin having a boiling point of 5 to 50°C, and a liquefied gas. This aerosol composition for forming a peelable coating adheres to the target surface in the form of a liquid film with almost no foaming, exhibiting excellent adhesion, and forming a flexible, easily peelable coating. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-193043 [Patent Document 2] Japanese Patent Publication No. 2020-200404 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventions described in Patent Documents 1 and 2 can cool a target surface. However, the inventions described in Patent Documents 1 and 2 form a peelable film, so a cooling sensation is imparted only to the applied surface. Therefore, with the inventions described in Patent Documents 1 and 2, for example, consumers cannot use the applied film to impart a cooling sensation or impart active ingredients to areas other than the applied surface. In addition, the discharged product is a film, which lacks appeal in appearance.

[0005] The present invention has been made in consideration of the above-mentioned conventional problems, and aims to provide an aerosol composition for forming resin foam, which foams when ejected, provides a cooling sensation, and can be applied in a rolling manner when pressed with a fingertip, thereby forming highly versatile spherical resin foams. [Means for solving the problem]

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

[0007] (1) An aerosol composition for forming resin foam, comprising a liquid concentrate and a liquefied gas, wherein the liquid concentrate contains a resin, a polyol, water, and a hydrofluoroolefin having a boiling point of 10 to 40°C, and the liquefied gas contains dimethyl ether.

[0008] According to this configuration, the resin foam-forming aerosol composition foams upon being discharged, forming spherical resin foams. The resin foams have a cooling sensation and can be applied in a rolling manner when pressed with a fingertip. Furthermore, because of their spherical shape, the resin foams have a cute appearance and are more appealing than films.

[0009] (2) The aerosol composition for forming resin foams according to (1), wherein the content of the polyol in the concentrate is 0.5 to 25% by mass.

[0010] According to this configuration, when the resin foam obtained after discharge is pressed with a finger, etc., the concentrate easily seeps out. Therefore, the aerosol composition for forming a resin foam can easily impart an active ingredient, etc. to a surface to be applied.

[0011] (3) The aerosol composition for forming resin foams according to (1) or (2), wherein the content of the hydrofluoroolefin in the concentrate is 3 to 40% by mass.

[0012] According to this configuration, when the aerosol composition for forming resin foam is dispensed and the dispensed product is pressed with a finger, vaporization of the hydrofluoroolefin in the dispensed product is easily promoted, and spherical resin foams are easily formed. [Effects of the Invention]

[0013] According to the present invention, an aerosol composition for forming resin foam can be provided which foams when ejected, provides a cooling sensation, and can be applied in a rolling manner when pressed with a fingertip, thereby forming highly versatile spherical resin foams. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a photograph showing the appearance of a resin foam obtained by discharging an aerosol composition for forming a resin foam according to one embodiment of the present invention. [Figure 2] FIG. 2 is a photograph showing the appearance of a resin foam obtained by ejecting the aerosol composition for forming a resin foam according to one embodiment of the present invention and adding a pattern to the resin foam. [Figure 3] FIG. 3 is a photograph showing the appearance of a resin foam obtained by ejecting the aerosol composition for forming a resin foam according to one embodiment of the present invention, when the resin foam is pressed with a finger. DETAILED DESCRIPTION OF THE INVENTION

[0015] <Aerosol composition for forming resin foam> An aerosol composition for forming a resin foam (hereinafter also referred to as an aerosol composition) according to one embodiment of the present invention comprises a concentrate and a liquefied gas. The concentrate contains a resin, a polyol, water, and a hydrofluoroolefin having a boiling point of 10 to 40°C. The liquefied gas contains dimethyl ether. Each of these will be described below.

[0016] (Undiluted) The raw solution contains a resin, a polyol, water, and a hydrofluoroolefin having a boiling point of 10 to 40°C.

[0017] ·resin The resin is dissolved in dimethyl ether in the aerosol container, and when it is discharged to the outside and the dimethyl ether volatilizes, it precipitates and forms a resin foam.

[0018] The resin is not particularly limited. For example, the resin may be an emulsion resin such as an alkyl acrylate copolymer emulsion, an alkyl acrylate-styrene copolymer emulsion, a vinylpyrrolidone-styrene copolymer emulsion, or an acrylic acid-hydroxy acrylate copolymer emulsion. Among these, the resin is preferably an alkyl acrylate copolymer emulsion because it is easy to form a resin foam.

[0019] The resin content is not particularly limited. For example, the resin content in the concentrate is preferably 30% by mass or more, more preferably 35% by mass or more. Furthermore, the resin content in the concentrate is preferably 65% ​​by mass or less, more preferably 60% by mass or less. By having the resin content within the above range, the aerosol composition is more likely to retain a hydrofluoroolefin having a boiling point of 10 to 40°C in the discharged product immediately after discharge. Furthermore, when the discharged product of the aerosol composition is pressed with a finger, vaporization of the hydrofluoroolefin is promoted within the discharged product, causing foaming and easily forming spherical resin foams. Note that emulsion-based resins contain water, preservatives, and the like in addition to the resin solids. Therefore, the resin content in this embodiment is the amount as an emulsion containing the resin solids, water, preservatives, and the like.

[0020] Polyol The polyol is blended for the purpose of making it easier for the concentrate to seep out of the resin foam when the resin foam is pressed with a finger.

[0021] The polyol is not particularly limited, and examples of the polyol include propylene glycol, 1,3-butylene glycol, hexylene glycol, dipropylene glycol, glycerin, and diglycerin.

[0022] The content of polyol is not particularly limited. For example, the content of polyol in the concentrate is preferably 0.5% by mass or more, more preferably 1% by mass or more. Furthermore, the content of polyol in the concentrate is preferably 25% by mass or less, more preferably 20% by mass or less. When the content of polyol is within the above range, the concentrate easily seeps out from the resin foam when the resin foam is pressed with a finger. Therefore, the aerosol composition easily delivers active ingredients, etc. to the application surface, etc.

[0023] ·water Water is used as a solvent for resins and active ingredients. The inclusion of water makes it easier for the concentrate to seep out of the resin foam. The resin foam also has reduced adhesiveness, making it less likely to stick to fingers, and can be applied by rolling it over the object.

[0024] The water is not particularly limited, and examples thereof include purified water, ion-exchanged water, physiological saline, and deep sea water.

[0025] The water content is not particularly limited. For example, the water content in the concentrate is preferably 0.5% by mass or more, more preferably 1.0% by mass or more. The water content in the concentrate is preferably 45% by mass or less, more preferably 40% by mass or less. When the water content is within the above range, the aerosol composition can be easily blended with a resin and an active ingredient. Furthermore, the obtained resin foam allows the concentrate to easily exude and can be easily applied by rolling it over an object.

[0026] Hydrofluoroolefins with a boiling point of 10 to 40°C When the aerosol composition is discharged, the hydrofluoroolefin having a boiling point of 10 to 40°C is retained inside the discharged product. When the discharged product is pressed with a finger, the vaporization of the hydrofluoroolefin having a boiling point of 10 to 40°C is promoted, forming a resin foam into a spherical shape. Furthermore, the hydrofluoroolefin having a boiling point of 10 to 40°C can provide a cooling sensation due to the heat of vaporization.

[0027] The hydrofluoroolefin having a boiling point of 10 to 40° C. is not particularly limited. Examples of hydrofluoroolefins having a boiling point of 10 to 40° C. include trans-1-chloro-3,3,3-trifluoropropene (HFO-1233zd(E), boiling point 19° C.), cis-1-chloro-3,3,3-trifluoropropene (HFO-1233zd(Z), boiling point 39° C.), and cis-1-chloro-2,3,3,3-tetrafluoroolefin (HFO-1224yd(Z), boiling point 15° C.). Hydrofluoroolefins having a boiling point of 10 to 40° C. may be used in combination.

[0028] The content of the hydrofluoroolefin having a boiling point of 10 to 40°C is not particularly limited. For example, the content of the hydrofluoroolefin having a boiling point of 10 to 40°C in the concentrate is preferably 3% by mass or more, and more preferably 5% by mass or more. Furthermore, the content of the hydrofluoroolefin having a boiling point of 10 to 40°C in the concentrate is preferably 40% by mass or less, and more preferably 35% by mass or less. When the content of the hydrofluoroolefin having a boiling point of 10 to 40°C is within the above range, the hydrofluoroolefin is easily retained in the discharged material immediately after discharge, and vaporization is promoted by pressing the discharged material with a finger, causing foaming and facilitating the formation of spherical resin foams.

[0029] ·Optional ingredients In addition to the above-mentioned resin, polyol, water, and hydrofluoroolefin having a boiling point of 10 to 40°C, the stock solution may contain alcohol, an active ingredient, a surfactant, an oil, a water-soluble polymer, a powder, and the like, as appropriate, depending on the application or purpose.

[0030] Alcohol may be blended for the purpose of adjusting the drying properties of the resin foam.

[0031] The alcohol is not particularly limited. For example, the alcohol is a monohydric alcohol having 2 to 3 carbon atoms, such as ethanol or isopropanol. The alcohols may be used in combination.

[0032] When alcohol is blended, the content of the alcohol is not particularly limited. For example, the content of the alcohol in the concentrate is preferably 0.1% by mass or more, more preferably 1% by mass or more. Furthermore, the content of the alcohol in the concentrate is preferably 15% by mass or less, more preferably 10% by mass or less. When the alcohol content is within the above range, a resin foam that dries appropriately is easily obtained.

[0033] The active ingredient can be appropriately selected depending on the application, purpose, etc. Examples of the active ingredient include various fragrances such as natural fragrances and synthetic fragrances, refreshing agents such as l-menthol, camphor, and peppermint oil, vitamins such as retinol, retinol acetate, retinol palmitate, calcium pantothenate, magnesium ascorbyl phosphate, sodium ascorbate, dl-α-tocopherol, tocopherol acetate, tocopherol, tocopherol nicotinate, dibenzoylthiamine, riboflavin, and mixtures thereof, ascorbic acid, α-tocopherol, dibutylhydroxytoluene, ... Antioxidants such as hydroxyanisole, amino acids such as glycine, alanine, leucine, serine, tryptophan, cysteine, methionine, aspartic acid, glutamic acid, arginine, moisturizers such as collagen, hyaluronic acid, caronic acid, sodium lactate, dl-pyrrolidone carboxylate, keratin, casein, lecithin, urea, preservatives such as parahydroxybenzoate, sodium benzoate, potassium sorbate, phenoxyethanol, benzalkonium chloride, benzethonium chloride, chlorhexidine chloride, parachlormethicone, benzoic acid, benzoyl benzoate, benzoic acid ester ... Bactericidal disinfectants such as tacresol, extracts such as royal jelly extract, peony extract, loofah extract, rose extract, lemon extract, aloe extract, calamus root extract, eucalyptus extract, sage extract, tea extract, seaweed extract, placenta extract, silk extract, astringents such as zinc oxide, allantoin hydroxyaluminum, tannic acid, citric acid, lactic acid, anti-inflammatory agents such as allantoin, glycyrrhetinic acid, dipotassium glycyrrhizinate, azulene, methacrylate laurate, methyl benzoate, methyl phenylacetate, geraniol Deodorants such as rotolate, acetophenone myristate, benzyl acetate, benzyl propionate, and green tea extract; UV absorbers such as diethylaminohydroxybenzoyl hexyl benzoate, 2-ethylhexyl paramethoxycinnamate, ethylhexyl triazone, oxybenzone, hydroxybenzophenone sulfonic acid, dihydroxybenzophenone sodium sulfonate, and dihydroxybenzophenone; UV scattering agents such as zinc oxide, titanium oxide, and octyltrimethoxysilane-coated titanium oxide; whitening agents such as arbutin and kojic acid;These include antiperspirants such as chlorohydroxyaluminum and isopropylmethylphenol, and anti-inflammatory analgesics such as methyl salicylate, indomethacin, felbinac, and ketoprofen.

[0034] When an active ingredient is blended, the content of the active ingredient is not particularly limited. For example, the content of the active ingredient in the concentrate is preferably 0.1% by mass or more, more preferably 0.3% by mass or more. Furthermore, the content of the active ingredient in the concentrate is preferably 20% by mass or less, more preferably 15% by mass or less. When the content of the active ingredient is within the above range, the effect of blending the active ingredient can be easily obtained.

[0035] The surfactant may be blended for the purpose of making the ejected material foam easily, removing dirt from the target object, etc.

[0036] The surfactant is not particularly limited. Examples of surfactants include nonionic surfactants such as polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene polyoxypropylene alkyl ethers, polyethylene glycol fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene sorbit fatty acid esters; anionic surfactants such as fatty acid soaps, alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkyl phosphates, and polyoxyethylene alkyl ether phosphates; cationic surfactants such as alkyl ammonium salts and polyoxyethylene alkylamines; amphoteric surfactants such as alkyl betaines and fatty acid amidopropyl betaines; silicone surfactants; and amino acid surfactants such as N-acyl glutamate, N-acyl glutamic acid, N-acyl glycine salts, and N-acylalanine salts. Surfactants may be used in combination.

[0037] When a surfactant is blended, the content of the surfactant is not particularly limited. For example, the content of the surfactant in the undiluted solution is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. Furthermore, the content of the surfactant in the undiluted solution is preferably 10% by mass or less, more preferably 8% by mass or less. When the content of the surfactant is within the above range, the effects of blending the surfactant can be easily obtained.

[0038] The oil agent may be blended for the purpose of adjusting the hardness of the resin foam, removing oily stains, etc.

[0039] The oil is not particularly limited. Examples of the oil include ester oils such as isopropyl myristate, isopropyl palmitate, diisopropyl adipate, tri(caprylic / capric)glycerin, diethoxyethyl succinate, methylpentanediol dineopentanoate, and neopentyl glycol dicaprate, hydrocarbon oils such as liquid paraffin, kerosene, squalene, squalane, and isoparaffin, avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, sesame oil, castor oil, and linseed oil. Examples of oils and fats include ginseng oil, safflower oil, jojoba oil, malt oil, coconut oil, and palm oil, silicone oils such as methylpolysiloxane, methylphenylpolysiloxane, and methylpolycyclosiloxane, higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid, and higher alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, lanolin alcohol, hexyldodecanol, cetostearyl alcohol, and octyldodecanol. Oils may be used in combination.

[0040] When an oil is blended, the content of the oil is not particularly limited. For example, the content of the oil in the undiluted solution is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. Furthermore, the content of the oil in the undiluted solution is preferably 10% by mass or less, and more preferably 8% by mass or less. When the content of the oil is within the above range, the effects of blending the oil are easily obtained.

[0041] The water-soluble polymer is preferably blended for the purpose of making it easier to retain the hydrofluoroolefin in the discharged material.

[0042] The water-soluble polymer is not particularly limited. Examples of the water-soluble polymer include cellulose polymers such as cellulose nanofiber, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, and sodium carboxymethyl cellulose, gums such as xanthan gum, carrageenan, gum arabic, gum tragacanth, cationized guar gum, guar gum, and gellan gum, dextran, sodium carboxymethyl dextran, dextrin, pectin, sodium alginate, sodium hyaluronate, polyvinyl alcohol, and carboxyvinyl polymers.

[0043] When a water-soluble polymer is blended, the content of the water-soluble polymer is not particularly limited. For example, the content of the water-soluble polymer in the concentrate is preferably 0.01% by mass or more, more preferably 0.05% by mass or more. Furthermore, the content of the water-soluble polymer in the concentrate is preferably 5% by mass or less, more preferably 3% by mass or less. When the content of the water-soluble polymer is within the above range, the effects of blending the water-soluble polymer can be easily obtained.

[0044] Powder is preferably blended to improve the feel when used, such as to improve the smoothness.

[0045] The powder is not particularly limited, and examples thereof include talc, zinc oxide, titanium oxide, silica, zeolite, kaolin, mica, magnesium carbonate, calcium carbonate, zinc silicate, magnesium silicate, aluminum silicate, and calcium silicate.

[0046] When powder is blended, the content of the powder is not particularly limited. For example, the content of the powder in the concentrate is preferably 0.1% by mass or more, more preferably 0.3% by mass or more. Furthermore, the content of the powder in the concentrate is preferably 5% by mass or less, more preferably 3% by mass or less. By keeping the powder content within the above range, the effects of blending the powder can be easily obtained.

[0047] The method for preparing the stock solution is not particularly limited. The stock solution can be prepared by a conventionally known method. For example, the stock solution is prepared by adding a resin, a polyol, and optional ingredients such as an active ingredient and alcohol to water or warm water to prepare a stock solution base. Furthermore, when an oil agent is contained, the stock solution base may be made into an emulsion. The stock solution can be prepared by filling this stock solution base into a sealable tank, and then filling and mixing the hydrofluoroolefin therein. Note that it is preferable to fill the hydrofluoroolefin after cooling it to below its boiling point.

[0048] (liquefied gas) The liquefied gas includes dimethyl ether.

[0049] Dimethyl ether Dimethyl ether liquefies in the aerosol container and stably dissolves the resin. When discharged to the outside, the dimethyl ether vaporizes, causing the resin to precipitate and form a resin foam.

[0050] The content of dimethyl ether in the aerosol composition is preferably 45% by mass or more, and more preferably 50% by mass or more. The content of dimethyl ether in the aerosol composition is preferably 85% by mass or less, and more preferably 80% by mass or less. When the content of dimethyl ether is within the above range, the aerosol composition stably dissolves the resin in the aerosol container, easily forms a resin foam, and easily cools the resin foam, imparting a cooling effect to the coated surface.

[0051] The liquefied gas may consist solely of dimethyl ether, or may contain other liquefied gases. The other liquefied gases are not particularly limited. Examples of other liquefied gases include hydrofluoroolefins with boiling points below 5°C, such as trans-1,3,3,3-tetrafluoroprop-1-ene (HFO-1234ze, boiling point -19°C) and trans-2,3,3,3-tetrafluoroprop-1-ene (HFO-1234yf, boiling point -29°C), and aliphatic hydrocarbons having 3 to 5 carbon atoms, such as propane, normal butane, isobutane, isopentane, and mixtures thereof.

[0052] If other liquefied gases are included, a portion of the dimethyl ether may be replaced with the other liquefied gases.

[0053] The aerosol composition may be pressurized with a compressed gas. The compressed gas is not particularly limited. Examples of compressed gases include nitrogen, air, oxygen, hydrogen, carbon dioxide, and nitrous oxide.

[0054] When compressed gas is used, the compressed gas is filled so that the pressure inside the aerosol container at 25° C. is preferably 0.4 MPa or more, and more preferably 0.5 MPa or more. The compressed gas is filled so that the pressure inside the aerosol container at 25° C. is preferably 0.7 MPa or less, and more preferably 0.6 MPa or less. By filling the aerosol container with compressed gas so that the pressure is within the above range, the aerosol composition can be stably discharged even at low temperatures.

[0055] The aerosol composition of this embodiment can be prepared by filling the concentrate into the container body, fastening the valve, filling the liquefied gas through the valve, and mixing the concentrate and the liquefied gas. The liquefied gas may be filled just before fastening the valve. Alternatively, the concentrate base and the hydrofluoroolefin may be filled separately into the container body. Furthermore, the hydrofluoroolefin may be mixed with the liquefied gas, and this mixture may be filled into an aerosol container filled with the concentrate base.

[0056] The container body is a container filled with the aerosol composition, and is cylindrical with a bottom. A valve is attached to the opening of the container body.

[0057] The material of the container body is not particularly limited, and examples of the material of the container body include metals such as aluminum and tinplate, various synthetic resins, and pressure-resistant glass.

[0058] The valve is a component for closing and sealing the opening of the container body. The valve mainly comprises a housing held by a mounting cup attached to the opening of the container body, a stem with a stem hole that connects the inside and outside of the container body, and a stem rubber attached around the stem hole for closing the stem hole. The housing houses the stem, the stem rubber, and a spring that urges the stem upward. An ejection member for spraying the aerosol composition is attached to the upper end of the stem.

[0059] The spray member is a member for spraying the aerosol composition by opening and closing the valve, and is attached to the upper end of the stem. The spray member mainly comprises a nozzle portion having a spray hole formed therein and an operating portion that is operated by the user with a finger or the like. The aerosol composition is sprayed from the spray hole. The number and shape of the spray holes are not particularly limited. There may be multiple spray holes. The shape of the spray hole may also be approximately circular, approximately angular, etc.

[0060] When the ejection member of the aerosol composition of this embodiment is depressed, the stem of the valve is pushed downward. This causes the stem rubber to bend downward, opening the stem hole. As a result, the inside of the container body and the outside are connected to each other. When the inside of the container body and the outside are connected to each other, the aerosol composition is drawn into the housing due to the pressure difference between the inside of the container body and the outside, passes through the stem hole and the stem passage, and is sent to the ejection member and then ejected from the ejection hole. The ejected aerosol composition foams on the target surface (e.g., an arm) to form a spherical resin foam. Figures 1 and 2 are photographs of the appearance of a resin foam obtained by ejecting the aerosol composition of this embodiment. Because of its spherical shape, the resin foam has a cute appearance and is more creative than a film. As shown in Figure 2, the resin foam obtained by ejecting the aerosol composition of this embodiment forms a resilient resin film, which allows for the drawing of letters, patterns, etc., on the surface, making it highly creative.

[0061] FIG. 3 is a photograph showing the appearance of a resin foam obtained by ejecting the aerosol composition of this embodiment, being pressed with a finger. The resin foam has a cooling sensation and can cool a target surface. As shown in FIG. 3, the resin foam is hollow inside, so it can be pressed against a target surface while reducing the pressure applied with a fingertip. Furthermore, the resin foam can be picked up with the fingers and applied to various areas (for example, around the eyes or mouth), or can be applied by rolling it over the surface. [Example]

[0062] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples in any way.

[0063] Example 1 A concentrate 1 was prepared according to the formulation shown in Table 1 below, and 35 g (35 mass %) was filled into an aluminum container. A valve was attached to the opening of the container, and 65 g (65 mass %) of dimethyl ether was filled through the valve. The concentrate and dimethyl ether were mixed in the aerosol container to prepare an aerosol composition.

[0064] [Table 1]

[0065] Example 2 An aerosol composition was prepared in the same manner as in Example 1, except that the amount of stock solution 1 filled was 25 g (25 mass %) and the amount of dimethyl ether filled was 75 g (75 mass %).

[0066] Example 3 An aerosol composition was prepared in the same manner as in Example 1, except that stock solution 2 shown in Table 1 was used instead of stock solution 1.

[0067] (Comparative Example 1) An aerosol composition was prepared in the same manner as in Example 1, except that stock solution 3 shown in Table 1 was used instead of stock solution 1.

[0068] The shape of the resin foam, the applicability, and the cooling sensation were evaluated by the following evaluation methods using the aerosol compositions of Examples 1 to 3 and Comparative Example 1. The results are shown in Table 2.

[0069] <Shape of resin foam> The aerosol container was immersed in a thermostatic water bath adjusted to 25° C. for 1 hour to adjust the aerosol composition to 25° C. The shape of the resin foam formed from the aerosol composition discharged onto the palm of a hand was evaluated according to the following evaluation criteria. (Evaluation criteria) ⊚: The resin foam slowly expanded and became spherical without being pressed with a fingertip. ◯: When the surface of the resin foam was lightly pressed with a fingertip several times, it slowly expanded and became spherical. ×: The resin foam did not become spherical even when the surface was lightly pressed with a fingertip several times.

[0070] <Applicability> The formed resin foam was pressed against the back of the hand with the fingertips and moved forward, and the state of the foam was evaluated according to the following evaluation criteria. (Evaluation criteria) ○: The resin foam was easy to peel off and moved smoothly as if rolling over the back of the hand. ×: The resin foam was prone to sticking and did not move smoothly on the back of the hand without rolling.

[0071] <Cooling feeling> The resulting resin foam was applied to the back of the hand, and the cooling sensation was evaluated according to the following evaluation criteria. (Evaluation criteria) ○: The resin foam felt cold. ×: The resin foam did not feel cold.

[0072] [Table 2]

[0073] As shown in Table 2, the aerosol compositions of Examples 1 to 3 of the present invention expanded after being discharged, and were able to form unique spherical resin foams. The resulting resin foams had a cooling sensation, were easy to peel off, and could be moved by rolling. On the other hand, the aerosol composition of Comparative Example 1, which did not contain a hydrofluoroolefin having a boiling point of 10 to 40°C, produced non-spherical resin foams that tended to stick to the coated surface.

[0074] Example 4 A concentrate 4 was prepared according to the formulation shown in Table 3 below, and 44 g (44 mass%) was filled into an aluminum container. The opening valve of the container was fixed, and 56 g (56 mass%) of dimethyl ether was filled through the valve. The concentrate and dimethyl ether were mixed in the aerosol container to prepare an aerosol composition.

[0075] Example 5 An aerosol composition was prepared in the same manner as in Example 4, except that stock solution 5 shown in Table 3 was used instead of stock solution 4.

[0076] [Table 3]

[0077] The shape of the resin foam, the applicability, and the cooling sensation were evaluated by the following evaluation methods using the aerosol compositions of Examples 4 and 5. The results are shown in Table 4.

[0078] [Table 4]

[0079] As shown in Table 4, the aerosol compositions of Examples 4 and 5 of the present invention expanded after being discharged to form attractive spherical resin foams. The resulting resin foams had a cooling sensation, were easy to peel off, and could be moved by rolling.

Claims

1. It consists of a concentrate and liquefied gas, The raw solution contains a resin, a polyol, water, and a hydrofluoroolefin having a boiling point of 10 to 40°C, the hydrofluoroolefin having a boiling point of 10 to 40°C includes at least one of trans-1-chloro-3,3,3-trifluoropropene, cis-1-chloro-3,3,3-trifluoropropene, or cis-1-chloro-2,3,3,3-tetrafluoroolefin; The aerosol composition for forming a resin foam, wherein the liquefied gas contains dimethyl ether.

2. 2. The aerosol composition for forming resin foam according to claim 1, wherein the content of the polyol in the concentrate is 0.5 to 25% by mass.

3. 3. The aerosol composition for forming resin foam according to claim 1, wherein the content of the hydrofluoroolefin in the concentrate is 3 to 40% by mass.

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