JP2020040899A - Foamable composition - Google Patents

Abstract

To provide a foamable composition that gives a comfortable stimulus when bubbles burst, and continuously gives a moderate cooling feeling.SOLUTION: A foamable composition has an emulsification stock solution containing water, a surfactant and hydrofluoroolefin, and a compressed gas, the hydrofluoroolefin having a boiling point of 5-30°C and the content of the hydrofluoroolefin is 40-90 mass% in the emulsification stock solution.SELECTED DRAWING: None

Description

  The present invention relates to a foamable composition. More specifically, the present invention relates to a foamable composition that can provide a pleasant stimulus when a bubble pops and that maintains a proper cooling sensation.

  BACKGROUND ART Foamable compositions which foam after ejection to form a foam have been known. Patent Literature 1 discloses an aerosol composition containing water, a surfactant, and an aliphatic hydrocarbon having a boiling point of -5 to 40 ° C and forming a foam by breaking bubbles. Further, Patent Literature 2 contains an aqueous stock solution containing water and a surfactant, a heavy liquefied gas (hydrofluoroolefin), and a light liquefied gas, and contains an aqueous stock solution, a heavy liquefied gas, and a light liquefied gas. An aerosol composition is disclosed in which a gas is emulsified to form a foam that emits foam. These provide a moderate stimulus when the bubbles pop.

JP-A-2-255889 JP-A-2006-191058

  The aerosol compositions described in Patent Literature 1 and Patent Literature 2 each have an excellent cooling effect immediately after application. However, these aerosol compositions do not maintain the cooling effect.

  The present invention has been made in view of such a conventional problem, and provides a foamable composition that can provide a pleasant stimulus when a bubble pops and that can maintain a proper cooling feeling continuously. With the goal.

  The present invention for solving the above problems mainly includes the following configurations.

  (1) An emulsified stock solution containing water, a surfactant and a hydrofluoroolefin, and a compressed gas, wherein the hydrofluoroolefin has a boiling point of 5 to 30 ° C and is contained in an emulsified stock solution at 40 to 90% by mass. Effervescent composition.

  According to such a configuration, the compressed gas can be dissolved in the emulsified stock solution (particularly, the hydrofluoroolefin in the emulsified product) to have a high concentration. Therefore, when the foamable composition is discharged to the outside, the compressed gas dissolved in the emulsified stock solution is gradually released, whereby the vaporization of the hydrofluoroolefin is promoted and foamed. The foam pops when applied to the scalp or skin, providing a pleasant stimulus. Further, in the foamable composition, the dissolved compressed gas is gradually released, so that the vaporization of the hydrofluoroolefin is continued, and an appropriate cooling feeling is continuously obtained.

  (2) The foamable composition according to (1), wherein the hydrofluoroolefin is 1-chloro-3,3,3-trifluoropropene.

  According to such a configuration, 1-chloro-3,3,3-trifluoropropene has a boiling point of 19 ° C. Therefore, when the foamable composition is applied to the scalp or skin, the foamable composition is easily vaporized on the body surface, and a cold feeling is easily obtained. Further, the emulsified liquid itself has almost no vapor pressure. Therefore, the emulsified stock solution easily dissolves the compressed gas. As a result, in the foamable composition, a pleasant stimulus is easily obtained, and a cooling feeling is easily obtained more continuously.

  (3) The compressed gas contains a highly soluble compressed gas containing at least one of carbon dioxide gas and nitrous oxide, and at a temperature of 25 ° C. and 0.5 MPa, a liquid phase of the foamable composition at 28.degree. The foamable composition according to (1) or (2), wherein 0 g / L or more is dissolved.

  According to such a configuration, the compressed gas is particularly frequently dissolved in the hydrofluoroolefin. Therefore, in the foamable composition, the number of generated foam particles increases, and particularly comfortable stimulus is easily obtained. In addition, the dissolved compressed gas is released for a long time, and the cooling sensation is easily maintained.

  (4) The compressed gas contains a low-solubility compressed gas containing at least one of nitrogen, oxygen, air and hydrogen, and at 25 ° C. and 0.5 MPa, the liquid phase of the foamable composition has a viscosity of 3%. The foamable composition according to (1) or (2), wherein the foamable composition is dissolved in at least 0.0 g / L.

  According to such a configuration, bubbles of bubbles generated when the compressed gas is released tend to be fine. As a result, the foamable composition tends to provide gentle stimulation.

  ADVANTAGE OF THE INVENTION According to this invention, a pleasant stimulus is obtained at the time of foam popping, and the foaming composition which can obtain a moderate cooling feeling continuously can be provided.

<Foamable composition>
The foamable composition according to one embodiment of the present invention includes an emulsified stock solution containing water, a surfactant, and a hydrofluoroolefin, and a compressed gas. The boiling point of the hydrofluoroolefin is 5 to 30 ° C, and it is contained in the emulsified stock solution at 40 to 90% by mass. Hereinafter, each will be described.

(Emulsion stock solution)
The emulsified stock solution contains water, a surfactant and a hydrofluoroolefin.

・ Water Water is used as a solvent. When water is contained, the foamable composition can be foamed by discharging the compressed gas dissolved in the emulsified stock solution and vaporizing the hydrofluoroolefin when discharged to form a foam. The foam can pop and give a pleasant stimulus to the application site such as the hair or the arm.

  Water is not particularly limited. As an example, the water is purified water, ion-exchanged water, physiological saline, deep sea water, or the like.

  The content of water is not particularly limited. As an example, water is preferably 50% by mass or more, more preferably 55% by mass or more, in 100% by mass of a stock solution base material (hereinafter, simply referred to as a stock solution base material) obtained by removing hydrofluoroolefin from an emulsified stock solution. Is more preferable. Further, the water content is preferably 99% by mass or less, more preferably 98% by mass or less, in 100% by mass of the stock solution base material. When the content of water is within the above range, the foamable composition exhibits excellent foamability, and when applied, a comfortable stimulus is easily obtained and a cooling feeling is easily obtained.

-Surfactant The surfactant is blended as an emulsifier for emulsifying the hydrofluoroolefin with the stock solution base material. Also, when the surfactant was discharged to the outside, the compressed gas dissolved in the emulsified stock solution was released and dispersed as small bubbles, and these bubbles were emulsified in the emulsified stock solution by the generation of these bubbles. It is blended for the purpose of promoting the vaporization of the hydrofluoroolefin and foaming the emulsified stock solution to form a foam.

  The surfactant is not particularly limited. By way of example, surfactants include polyoxyethylene alkyl ethers such as POE lauryl ether, POE cetyl ether, POE stearyl ether, POE oleyl ether, POE behenyl ether, POE octyl dodecyl ether, POE POP cetyl ether, POE. Polyoxyethylene polyoxypropylene alkyl ether such as POP decyl tetradecyl ether, coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, fatty acid alkanolamide such as lauric acid diethanolamide, lauric acid monoisopropanolamide, polyethylene glycol monostearate Polyoxyethylene hydrogenated castor oil such as polyethylene glycol fatty acid ester such as POE hydrogenated castor oil, monostea Polyoxyethylene glycerin fatty acid esters such as POE glyceryl phosphate, POE glyceryl monooleate, polyoxyethylene alkyl ether fatty acid esters such as POE cetyl ether stearate and POE lauryl ether isostearate, POE sorbitan monofatty acid fatty acid, POE monostearate Polyoxyethylene sorbitan fatty acid esters such as sorbitan, POE sorbitan monooleate, POE sorbitan triisostearate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, pentaglyceryl monolaurate, pentaglyceryl monomyristate, pentaglyceryl monooleate, Pentaglyceryl monostearate, decaglyceryl monolaurate, decamonomyristate Nonionic surfactants such as polyglycerin fatty acid esters such as lyseryl, decaglyceryl monostearate, decaglyceryl monoisostearate, decaglyceryl monooleate, and decaglyceryl monolinoleate; fatty acids such as myristic acid and stearic acid; Saponified alkalis such as ethanolamine and potassium, alkyl phosphates such as potassium lauryl phosphate and sodium lauryl phosphate, polyoxyethylene alkyl ether phosphates such as POE lauryl ether sodium phosphate, ammonium lauryl sulfate, potassium lauryl sulfate Alkyl sulfates such as sodium lauryl sulfate, triethanolamine lauryl sulfate, sodium cetyl sulfate, sodium POE lauryl ether sulfate, POE lauryl ether sulfate Polyoxyethylene alkyl ether sulfates such as triethanolamine, POE alkyl ether sodium sulfate, POE alkyl ether triethanolamine sulfate, POE lauryl ether potassium acetate, POE lauryl ether sodium acetate, POE tridecyl ether potassium acetate, POE tridecyl ether Alkyl ether carboxylates such as sodium acetate, sodium lauryl sulfoacetate, sodium tetradecene sulfonate, sodium dioctyl sulfosuccinate, sodium dialkyl sulfosuccinate, sodium alkyl naphthalene sulfonate, sodium alkyl diphenyl ether disulfonate, sodium alkane sulfonate, dodecyl benzene Sulfonic acid, sodium dodecylbenzenesulfonate Anionic surfactants such as sulfonate; N-coconut fatty acid acyl-L-glutamate triethanolamine, N-coconut fatty acid acyl-L-glutamate, N-coconut fatty acid acyl-L-sodium glutamate, N -Lauroyl-L-glutamate triethanolamine, N-lauroyl-L-glutamate potassium, N-lauroyl-L-sodium glutamate, N-myristoyl-L-glutamate potassium, N-myristoyl-L-sodium glutamate, N-stearoyl- N-acyl glutamates such as sodium L-glutamate, N-acyl glycine salts such as N-coconut oil fatty acid acylglycine potassium, N-coconut oil fatty acylglycine sodium, and N-coconut fatty acid acyl-DL-alanine triethanol N-acylalanine salts such as ruamine; amino acid type anionic surfactants such as acylalanine salts such as sodium lauroylmethylalanine; polyoxyethylene / methylpolysiloxane copolymer, polyoxypropylene / methylpolysiloxane copolymer, Silicone surfactants such as poly (oxyethylene / oxypropylene) / methylpolysiloxane copolymers; betaine lauryl dimethylaminoacetate (lauryl betaine), stearyl betaine, amidopropyl betaine laurate, lauryl hydroxysulfobetaine, stearyl dimethylamino Alkyl betaines such as betaine acetate, dodecylaminomethyldimethylsulfopropylbetaine, and octadecylaminomethyldimethylsulfopropylbetaine; Betaines such as fatty acids amidopropyl betaine such as coconut fatty acid amidopropyldimethylaminoacetic acid betaine (cocamidopropyl betaine) and cocamidopropyl hydroxysultaine; 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazoly Alkyl imidazoles such as ammonium betaine; amino acids such as sodium lauroylglutamate, potassium lauroylglutamate and lauroylmethyl-β-alanine; amphoteric surfactants such as amine oxides such as lauryldimethylamine N-oxide and oleyldimethylamine N-oxide Agent and the like. Surfactants may be used in combination.

  Among them, surfactants are preferred because they easily emulsify the hydrofluoroolefin, improve the foamability of the foamable composition obtained, and easily provide a pleasant stimulus when the foam pops. Preferably, it contains an activator.

  The content of the surfactant is not particularly limited. For example, the content of the surfactant is preferably 0.1% by mass or more, more preferably 0.3% by mass or more in the stock solution base material. Further, the content of the surfactant is preferably 15% by mass or less, more preferably 10% by mass or less in the stock solution base material. When the content of the surfactant is within the above range, the foamable composition has excellent lathering, is less sticky, and has a good feeling in use.

-Hydrofluoroolefin The hydrofluoroolefin becomes fine emulsified particles in the container and emulsifies with the stock solution base to form an emulsified stock solution, and dissolves the compressed gas. When the hydrofluoroolefin is discharged to the outside, it is vaporized and foams the emulsified stock solution.

  The hydrofluoroolefin has a boiling point of 5 to 30C, and preferably 1-chloro-3,3,3-trifluoropropene (boiling point of 19C). Hydrofluoroolefins having a boiling point of 5 to 30 ° C. are other hydrofluoroolefins (eg, trans-1,3,3,3-tetrafluoropropene (boiling point −19 ° C.), 2,3,3,3-tetrafluoro It has a higher boiling point than propene (boiling point −30 ° C.). Therefore, even when the foamable composition is discharged, the hydrofluoroolefin having a boiling point of 5 to 30 ° C usually has no good foaming property because it does not vaporize instantaneously, but is dissolved in the hydrofluoroolefin in the container. When the compressed gas is discharged into the atmosphere, the dissolved amount is reduced to form fine bubbles, and vaporization of the hydrofluoroolefin is promoted with the generation of the bubbles. At this time, since the hydrofluoroolefin is emulsified as fine particles in the emulsified stock solution, a large number of air bubbles are formed to form a foam. Further, the foam is efficiently cooled by the heat of vaporization of the hydrofluoroolefin and tends to be cold. Further, by using 1-chloro-3,3,3-trifluoropropene as the hydrofluoroolefin, the hydrofluoroolefin is easily vaporized on the body surface when applied to the scalp or skin, and a cool feeling is obtained. Easy to be. Further, the emulsified liquid itself has almost no vapor pressure. Therefore, the emulsified stock solution easily dissolves the compressed gas. As a result, in the foamable composition, a pleasant stimulus is easily obtained, and a cooling feeling is easily obtained more continuously.

  The content of the hydrofluoroolefin may be 40% by mass or more, preferably 50% by mass or more in the emulsified stock solution. Further, the content of the hydrofluoroolefin may be 90% by mass or less, and is preferably 85% by mass or less. When the content of the hydrofluoroolefin is less than 40% by mass, the foamable composition has a small amount of the compressed gas dissolved in the hydrofluoroolefin, is less likely to be stimulated by foam breakage, and is less likely to maintain a cooling sensation. . On the other hand, when the content of the hydrofluoroolefin is more than 90% by mass, the foamable composition is less likely to foam, and it is difficult to obtain stimulation by foam breaking.

-Optional components In addition to the above-mentioned water, surfactant and hydrofluoroolefin, the emulsified stock solution may optionally contain optional components such as active ingredients, alcohols, water-soluble polymers, oils and powders.

  The active ingredient can be appropriately selected according to the use and purpose of the product. By way of example, the active ingredient may be a hair restorer such as minoxidil or adenosine, carpronium chloride, benzyl nicotinate, an extract of syrup, a vasodilator such as pepper tincture, retinol, retinol acetate, retinol palmitate, calcium pantothenate, and pantothenate. Vitamins such as tenol, ascorbic acid, magnesium phosphate, sodium ascorbate, dl-α-tocopherol, tocopherol acetate, tocopherol, tocopherol nicotinate, dibenzoylthiamine, riboflavin and mixtures thereof, ascorbic acid, α-tocopherol, dibutyl Antioxidants such as hydroxytoluene, butylhydroxyanisole, and sodium edetate; keratolytic agents such as urea and salicylic acid; collagen; hyaluronic acid; Moisturizing agents such as thorium, chondroitin sulfate, and heparin-like substances, isopropylmethylphenol, chlorhexidine gluconate, paraoxybenzoate, sodium benzoate, potassium sorbate, phenoxyethanol, benzalkonium chloride, benzethonium chloride, chlorhexidine chloride, parachlormeta Fungicides such as cresol, royal jelly extract, peonies extract, loofah extract, rose extract, lemon extract, aloe extract, shobu root extract, eucalyptus extract, sage extract, tea extract, seaweed extract, placenta extract, mokkou extract, licorice extract, hypericum extract Extracts such as l-menthol, camphor, peppermint oil, etc., zinc oxide, allantoin hydroxyaluminum, tannic acid, quencher Astringents such as acid and lactic acid, anti-inflammatory agents such as allantoin, glycyrrhetinic acid, dipotassium glycyrrhizinate, azulene, lauric methacrylate, methyl benzoate, methyl phenylacetate, geranyl crotolate, acetophenone myristate, benzyl acetate, benzyl propionate , Deodorants such as green tea extract, ultraviolet absorbers such as hexyl diethylaminohydroxybenzoyl benzoate, 2-ethylhexyl paramethoxycinnamate, ethylhexyl triazone, oxybenzone, hydroxybenzophenone sulfonic acid, sodium dihydroxybenzophenone sulfonate, dihydroxybenzophenone, UV-scattering agents such as zinc oxide, titanium oxide, titanium oxide coated with octyltrimethoxysilane, N, N-diethyl-m-toluamide (D ), Di-n-butylsuccinate, hydroxyanisole, rotenone, ethyl-butylacetylaminopropionate, icalizine (picaridine), p-menthane-3,8-diol, 3- [acetyl (butyl) amino] propionic acid Pest repellents such as ethyl and 1-methylpropyl 2- (2-hydroxyethyl) piperidine-1-carboxylate; antiperspirants such as chlorohydroxyaluminum and isopropylmethylphenol; anti-inflammatory agents such as methyl salicylate, indomethacin, felbinac and ketoprofen. Various fragrances such as analgesics, natural fragrances, and synthetic fragrances are included.

  When an active ingredient is blended, the content of the active ingredient is not particularly limited. As an example, the content of the active ingredient is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, in the stock solution base material. Further, the content of the active ingredient is preferably 30% by mass or less, more preferably 25% by mass or less, in the stock solution base material. When the content of the active ingredient is within the above range, the effect of blending the active ingredient is easily obtained, and the foaming composition is hardly reduced in foaming property by the active ingredient.

  Alcohol is suitably blended as a solvent for the active ingredient that is hardly soluble in water. In addition, alcohol is suitably blended for the purpose of adjusting foaming properties, adjusting stimulus at the time of foam breaking, and the like.

  Alcohol is not particularly limited. As an example, alcohols include monohydric alcohols having 2 to 3 carbon atoms such as ethanol and isopropanol, propylene glycol, 1,3-butylene glycol, hexylene glycol, glycerin, dipropylene glycol, and diglycerin. It is a valent alcohol.

  When alcohol is blended, the content of the alcohol is not particularly limited. For example, the content of the alcohol is preferably 1% by mass or more, more preferably 2% by mass or more, in the stock solution base material. Further, the content of the alcohol is preferably 30% by mass or less, more preferably 25% by mass or less in the stock solution base material. When the content of the alcohol is within the above range, the effect of blending the alcohol is easily obtained, and the foaming composition of the foamable composition is hardly deteriorated by the alcohol.

  The water-soluble polymer is suitably blended for the purpose of strengthening the foam film, strengthening the sound and stimulus when the foam breaks, and making it easier to obtain a massage feeling.

  The water-soluble polymer is not particularly limited. By way of example, water-soluble polymers include cellulose polymers such as hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, sodium carboxymethylcellulose, and cellulose nanofiber; xanthan gum, carrageenan, gum arabic, gum tragacanth, cationized Gums such as guar gum, guar gum and gellan gum; dextran, sodium carboxymethyldextran, dextrin, pectin, sodium alginate, sodium hyaluronate, polyvinyl alcohol, carboxyvinyl polymer and the like.

  When a water-soluble polymer is blended, the content of the water-soluble polymer is not particularly limited. As an example, the content of the water-soluble polymer is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, in the stock solution base material. Further, the content of the water-soluble polymer is preferably 5% by mass or less, more preferably 3% by mass or less in the stock solution base material. When the content of the water-soluble polymer is within the above range, the effect of blending the water-soluble polymer is easily obtained, the viscosity of the emulsified stock solution does not become too high, and the emulsifiability is not easily reduced.

  The oil agent is suitably blended for the purpose of adjusting the release state of the dissolved compressed gas, adjusting the sound and stimulation at the time of foam breakage, and the like.

  The oil agent is not particularly limited. For example, the oil agent may be dimethicone, methylpolysiloxane, cyclopentasiloxane, cyclohexasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, tetrahydrotetramethylcyclotetrasiloxane. Silicone oils such as siloxane, octamethyltrisiloxane, decamethyltetrasiloxane, methylhydrogenpolysiloxane, and methylphenylpolysiloxane; hydrocarbon oils such as liquid paraffin and isoparaffin; methylpentanediol dineopentanoate, diethylpentanediol dineopentanoate, Neopentyl glycol 2-ethylhexanoate, neopentyl glycol dicaprate, propylene dilaurate Glycol, ethylene glycol distearate, diethylene glycol dilaurate, diethylene glycol distearate, diethylene glycol diisostearate, diethylene glycol dioleate, triethylene glycol dilaurate, triethylene glycol distearate, triethylene glycol diisostearate, triethylene glycol dioleate, monostearic acid Propylene glycol, propylene glycol monooleate, ethylene glycol monostearate, glyceryl tri-2-ethylhexanoate, glycerin tri (caprylate / caprate), isononyl isononanoate, isotridecyl isononanoate, diethoxyethyl succinate, di-malate Isostearyl, isopropyl myristate, palmi Ester oils such as isopropyl phosphate, cetyl isooctanoate, octyl hydroxystearate, ethylhexyl hydroxystearate; oils and fats such as olive oil, camellia oil, corn oil, castor oil, safflower oil, jojoba oil and coconut oil; isostearic acid And higher fatty acids such as oleyl alcohol and isostearyl alcohol.

  When an oil is blended, the content of the oil is not particularly limited. As an example, the content of the oil agent is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, in the stock solution base material. Further, the content of the oil agent is preferably 15% by mass or less, more preferably 10% by mass or less in the stock solution base material. When the content of the oil agent is within the above range, the effect of blending the oil agent is easily obtained. In addition, the foamable composition is hardly reduced in foaming property, hardly reduced in drying property, and hardly sticky.

  The powder is suitably blended for the purpose of facilitating emulsification of the stock solution base and the hydrofluoroolefin, adsorbing sebum to prepare the scalp environment, imparting a smooth feeling and improving the usability.

  The powder is not particularly limited. By way of example, the powder may be talc, zinc oxide, titanium oxide, silica, zeolite, tapioca starch, kaolin, mica, magnesium carbonate, calcium carbonate, zinc silicate, magnesium silicate, aluminum silicate, calcium silicate, etc. is there.

  When powder is blended, the content of the powder is not particularly limited. As an example, the content of the powder is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, in the stock solution base material. Further, the content of the powder is preferably 10% by mass or less, more preferably 8% by mass or less, in the stock solution base material. When the content of the powder is within the above range, the effect of blending the powder is easily obtained, and the foaming composition is less likely to be clogged in the discharge passage when the composition is discharged.

  The method for preparing the emulsified stock solution is not particularly limited. The emulsified stock solution can be prepared by a conventionally known method. For example, an emulsified stock solution can be prepared by adding the above-mentioned surfactant and optional components to water or warm water to prepare a stock solution base material, and adding a hydrofluoroolefin thereto to emulsify.

(Compressed gas)
The compressed gas is blended as a propellant that pressurizes the emulsified stock solution and discharges it to the outside. In addition, the compressed gas is partially dissolved in the emulsified stock solution, so that when the foamable composition is discharged to the outside, the dissolved compressed gas becomes fine bubbles and promotes vaporization of the hydrofluoroolefin. Act as a foaming agent to foam the emulsified stock solution to form a foam.

  The compressed gas is dissolved in the hydrofluoroolefin having a boiling point of 5 to 30 ° C., which is emulsified in the emulsified stock solution in the container. It becomes bubbles and promotes vaporization of the hydrofluoroolefin. As a result, the foamable composition tends to provide a pleasant stimulus when the foam pops. Further, the compressed gas is released slowly, so that the vaporization of the hydrofluoroolefin can be continued and the feeling of cooling can be maintained.

  The compressed gas is not particularly limited. For example, the compressed gas is nitrogen, air, oxygen, hydrogen, carbon dioxide, nitrous oxide, or the like. Among these, the compressed gas has a large amount of dissolved in the hydrofluoroolefin, the number of foam particles to be generated increases, and a comfortable stimulus is easily obtained, and the dissolved compressed gas is released for a long time. It is preferable to include a highly soluble compressed gas such as carbon dioxide and nitrous oxide because the cooling sensation is easily maintained, and it is more preferable to include at least one of carbon dioxide and nitrous oxide. The compressed gas preferably contains a low-solubility compressed gas such as nitrogen, air, oxygen, and hydrogen because the generated foam particles are fine and easy stimulation is easily obtained. And at least one of hydrogen and hydrogen.

  In addition, the foamable composition of the present embodiment may include a liquefied gas as a propellant in addition to the compressed gas. The liquefied gas is not particularly limited. As an example, the liquefied gas may be liquefied petroleum gas consisting of propane, normal butane, isobutane and a mixture thereof, dimethyl ether, trans-1,3,3,3-tetrafluoroprop-1-ene (HFO-1234ze), And hydrofluoroolefins such as trans-2,3,3,3-tetrafluoroprop-1-ene (HFO-1234yf), and mixtures thereof. The liquefied gas may be further blended with a hydrocarbon having a boiling point of 5 to 40 ° C., such as normal pentane and isopentane, in order to further adjust the cooling temperature and duration.

  When a liquefied gas is blended, the blended amount of the liquefied gas is not particularly limited. For example, the content of the liquefied gas in the foamable composition excluding the compressed gas is preferably 3% by mass or more, more preferably 5% by mass or more. Further, the content of the liquefied gas is preferably 30% by mass or less, more preferably 25% by mass or less. When the content of the liquefied gas is within the above range, when the foamable composition is injected, the vaporization rate does not become too high, and an appropriate cooling effect is easily maintained.

  The compressed gas is preferably filled so that the pressure in the container at 25 ° C. becomes 0.2 MPa or more, and more preferably 0.3 MPa or more. The compressed gas is preferably charged so that the pressure in the container at 25 ° C. is 0.8 MPa or less, and more preferably 0.7 MPa or less. When the compressed gas is filled so that the pressure falls within the above range, the compressed gas is appropriately dissolved in the emulsified stock solution, bubbles are easily generated when the compressed gas is discharged, and a comfortable stimulus is easily obtained at the time of foam breaking.

  Returning to the description of the entire foamable composition, the foamable composition of the present embodiment is filled in a pressure-resistant container body when a discharge product is manufactured. In the filled state, the foamable composition forms a gas phase mainly composed of a gaseous compressed gas and a liquid phase composed of an emulsified stock solution and a liquid compressed gas dissolved in the emulsified stock solution. . In the foamable composition of the present embodiment, the compressed gas is largely dissolved in the liquid phase (particularly, hydrofluoroolefin) of such an emulsified stock solution. Specifically, when the compressed gas contains a highly soluble compressed gas, the compressed gas dissolves in the liquid phase of the foamable composition at 28.0 g / L or more at 25 ° C. and 0.5 MPa. It is more preferable that 30.0 g / L or more is dissolved. Further, the compressed gas is preferably dissolved in the liquid phase of the foamable composition in an amount of 52.0 g / L or less, more preferably 50.0 g / L or less. Such a foamable composition is easy to provide a pleasant stimulus at the time of foam breaking, and the release from the emulsified stock solution is continued and the cooling feeling is easily maintained. When the compressed gas contains a low-solubility compressed gas, at 25 ° C. and 0.5 MPa, the compressed gas may be dissolved in the liquid phase of the foamable composition at least 3.0 g / L. More preferably, it is dissolved in 4.0 g / L or more. Further, the compressed gas is preferably dissolved in the liquid phase of the foamable composition in an amount of 20.0 g / L or less, more preferably 10.0 g / L or less. Such a foamable composition is easy to obtain a gentle stimulus at the time of foam breaking because the foam particles are small.

  The method for preparing the foamable composition is not particularly limited. As an example, the foaming composition is to fill the emulsified stock solution into a pressure-resistant container body, attach an aerosol valve to the container body, seal the container, fill the compressed gas from the aerosol valve, and dissolve the compressed gas. Can be produced.

<Discharge products>
A discharge product according to one embodiment of the present invention is a discharge product filled with the foamable composition described above and discharging the emulsified stock solution by compressing it with a compressed gas. Note that the discharge product of the present invention only needs to have a configuration capable of discharging the emulsified stock solution under pressure with a compressed gas, and such a configuration is not particularly limited. Therefore, in the present embodiment, as an example, a discharge product mainly including a container body filled with a foamable composition and a compressed gas, and a valve mechanism attached to the container body will be described.

(Container body)
The container body is a container filled with the emulsified stock solution and the compressed gas. The container body is a bottomed cylindrical pressure-resistant container having an opening at the top. The opening is a filling port for filling the emulsified stock solution, and is closed by a valve mechanism described later.

  The material of the container body is not particularly limited. To give an example, the material of the container body is a metal such as aluminum and tinplate, various synthetic resins, pressure-resistant glass and the like.

(Valve mechanism)
The valve mechanism is a member for closing and sealing the opening of the container body. In addition, the valve mechanism mainly includes a housing, a stem having a stem hole communicating between the inside and the outside of the container body, and a stem rubber attached around the stem hole to close the stem hole. The housing houses the stem. The stem is a substantially cylindrical portion, and has a passage in the stem through which the foamable composition taken into the housing at the time of discharge passes. Near the lower end of the intra-stem passage, there is formed a stem hole communicating the space in the housing and the intra-stem passage. A discharge member for discharging the foamable composition is attached to the upper end of the stem. The stem rubber is a member that is attached around the stem hole and that appropriately blocks the internal space of the housing from the outside. The stem rubber is a disc-shaped member, and closes the stem hole by bringing the inner peripheral surface into close contact with the outer peripheral surface of the stem where the stem hole is formed, when not discharging.

(Discharge member)
The discharge member is a member for discharging the foamable composition, and is attached to the upper end of the stem. The ejection member mainly includes a nozzle unit and an operation unit operated by a user with a finger or the like. The nozzle portion is a substantially cylindrical portion, and has a discharge passage through which the foamable composition passes. An opening (discharge hole) is formed at the tip of the discharge passage. The foamable composition is discharged from the discharge holes. The number and shape of the ejection holes are not particularly limited. A plurality of discharge holes may be provided. Further, the shape of the discharge hole may be a substantially circular shape, a substantially square shape, or the like.

  In the discharge product of the present embodiment, when the discharge member is pressed down, the stem of the valve mechanism is pressed down. Thereby, the stem rubber bends downward, and the stem hole is opened. As a result, the inside of the container body and the outside communicate with each other. When the inside and outside of the container communicate with each other, the surface of the emulsified stock solution is pressed by the pressure of the compressed gas mainly present in the gas phase portion of the container. As a result, the emulsified stock solution is taken into the housing, then passes through the stem hole and the passage in the stem, is sent to the ejection member, and is thereafter ejected from the ejection hole.

  Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to these examples.

(Example 1)
According to the following formulation (unit: mass%), a stock solution base 1 containing no hydrofluoroolefin was prepared. In a pressure-resistant aluminum container (full volume 130 mL), 21.0 g of stock solution 1 (24.8% by mass, 30% by volume in emulsified stock solution) and hydrofluoroolefin (1-chloro-3,3,3-triene) Fluoropropene (* 1)) was charged with 63.7 g (75.2% by mass in the emulsified stock solution, 70% by volume), and a valve was attached to the opening of the pressure-resistant container and sealed. The container was shaken to emulsify the stock solution base 1 and the hydrofluoroolefin. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 3.0 g, and the concentration of carbon dioxide dissolved in the liquid phase was 42.2 g / L.
* 1: HFO-1233zd, boiling point 19 ° C., liquid density 1.3 g / mL

<Undiluted substrate 1>
POE monolaurate (20) sorbitan (* 2) 1.0
POE monostearate (20) sorbitan (* 3) 0.1
Hydroxyethyl cellulose 0.1
Methyl paraben 0.1
Ethanol 5.0
Purified water 92.7
Talc 1.0
Total 100.0 (% by mass)
* 2: NIKKOL TL-10 (trade name), manufactured by Nikko Chemical Co., Ltd. * 3: NIKKOL TS-10V (trade name), manufactured by Nikko Chemicals Co., Ltd.

(Example 2)
24.5 g of stock solution base material 1 (29.3% by mass in emulsified stock solution, 35% by volume) and 59.2 g of hydrofluoroolefin (1-chloro-3,3,3-trifluoropropene (* 1)) ( An emulsified stock solution was prepared in the same manner as in Example 1 except that the emulsified stock solution was filled (70.7% by mass, 65% by volume). Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The filled carbon dioxide was 2.9 g, and the concentration of carbon dioxide dissolved in the liquid phase was 41.4 g / L.

(Example 3)
17.5 g of stock solution base material 1 (20.4% by mass in emulsion stock solution, 25% by volume) and 67.3 g of hydrofluoroolefin (1-chloro-3,3,3-trifluoropropene (* 1)) An emulsified stock solution was prepared in the same manner as in Example 1 except that 79.6% by mass (75% by volume in the emulsified stock solution) was filled. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 3.2 g, and the concentration of carbon dioxide dissolved in the liquid phase was 45.1 g / L.

(Example 4)
14.0 g of the stock solution base material 1 (16.1% by mass, 20% by volume in the emulsified stock solution) and 72.8 g of hydrofluoroolefin (1-chloro-3,3,3-trifluoropropene (* 1)) ( (83.9% by mass, 80% by volume in the emulsified stock solution) Except for filling, an emulsified stock solution was prepared in the same manner as in Example 1. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 3.5 g, and the concentration of carbon dioxide dissolved in the liquid phase was 49.4 g / L.

(Example 5)
10.5 g of stock solution base material 1 (11.9% by mass, 15% by volume in emulsified stock solution) and 77.4 g of hydrofluoroolefin (1-chloro-3,3,3-trifluoropropene (* 1)) ( An emulsified stock solution was prepared in the same manner as in Example 1 except that 88.1% by mass (85% by volume in the emulsified stock solution) was filled. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 3.5 g, and the concentration of carbon dioxide dissolved in the liquid phase was 49.4 g / L.

(Example 6)
21.0 g of stock solution base material 1 (36.6% by mass in emulsified stock solution, 30.3% by mass in foamable composition excluding carbon dioxide gas, 30% by volume) in an aluminum pressure-resistant container (full injection volume: 130 mL), 36.4 g of hydrofluoroolefin (1-chloro-3,3,3-trifluoropropene) (63.4% by mass in the emulsified stock solution, 52.4% by mass in the foamable composition excluding carbon dioxide gas, 40% by volume) ) Filled, sealed with a valve attached to the opening of the pressure vessel. Further, 12.0 g of butane (* 4) was filled from the stem of the valve (17.3% by mass, 30% by volume in the foaming composition excluding carbon dioxide), and the container was shaken to shake the stock solution base 1 and the hydrodynamic solution. The fluoroolefin and butane were emulsified. Next, carbon dioxide was filled from the stem of the valve to dissolve it in the stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 2.0 g, and the concentration of carbon dioxide dissolved in the liquid phase was 28.1 g / L.
* 4: A mixture of normal butane (boiling point -0.5 ° C) and isobutane (boiling point -11.7 ° C), liquid density 0.573 g / mL

(Example 7)
A foamable composition was prepared in the same manner as in Example 1 except that nitrogen gas was charged instead of carbon dioxide gas and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of the filled nitrogen gas was 0.4 g, and the concentration of the nitrogen gas dissolved in the liquid phase was 5.3 g / L.

(Comparative Example 1)
49.0 g of the stock solution base material 1 (64.2% by mass, 70% by volume in the emulsified stock solution), and 27.3 g of hydrofluoroolefin (1-chloro-3,3,3-trifluoropropene (* 1)) ( An emulsified stock solution was prepared in the same manner as in Example 1, except that 35.8% by mass (30% by volume in the emulsified stock solution) was filled. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 1.6 g, and the concentration of carbon dioxide dissolved in the liquid phase was 22.9 g / L.

(Comparative Example 2)
7.0 g of stock solution base material 1 (7.9% by mass, 10% by volume in emulsified stock solution) and 81.9 g of hydrofluoroolefin (1-chloro-3,3,3-trifluoropropene (* 1)) ( An emulsified stock solution was prepared in the same manner as in Example 1 except that the filling was 92.1% by mass (90% by volume in the emulsified stock solution). Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The filled carbon dioxide was 3.7 g, and the concentration of carbon dioxide dissolved in the liquid phase was 52.2 g / L.

(Comparative Example 3)
21.0 g (42.8% by mass, 30% by volume in the foaming composition excluding carbon dioxide gas) of the stock solution 1 was filled in an aluminum pressure-resistant container (full injection volume: 130 mL), and a valve was attached to the mouth. Sealed. Further, 28.1 g of butane (57.2% by mass, 70% by volume in the foamable composition excluding carbon dioxide gas) was charged from the stem of the valve, and the container was shaken to emulsify the stock solution base and butane. Next, carbon dioxide was filled from the stem of the valve to dissolve it in the stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The filled carbon dioxide was 1.2 g, and the concentration of carbon dioxide dissolved in the liquid phase was 16.7 g / L.

(Comparative Example 4)
21.0 g of undiluted base material 1 (32.6% by mass, 30% by volume in the foamable composition excluding carbon dioxide gas) and 43.4 g of isopentane (* 5) in a pressure-resistant aluminum container (full volume 130 mL) (67.4% by mass, 70% by volume in the foaming composition excluding carbon dioxide), and a valve was attached to the opening of the pressure-resistant container to seal it. The container was shaken to emulsify the stock solution base and isopentane. Next, carbon dioxide was filled from the stem of the valve to dissolve it in the stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 2.0 g, and the concentration of carbon dioxide dissolved in the liquid phase was 27.9 g / L.
* 5: Boiling point 27.8 ° C, liquid density 0.62 g / mL

  The formulations (excluding the compressed gas) of the foamable compositions of Examples 1 to 6 and Comparative Examples 1 to 4 are shown in Tables 1 and 2 below. In addition, among numerical values in the table, the upper part shows mass%, and the lower part (in parentheses) shows volume%.

  Using the foamable compositions prepared in Examples 1 to 7 and Comparative Examples 1 to 4, the state of the discharged material, cooling feeling, and massage effect were evaluated by the following evaluation methods. Table 3 shows the results.

<State of ejected material>
Using a discharge product in which the temperature of the content was adjusted to 25 ° C. by immersing it in a thermostatic water bath adjusted to 25 ° C. for 1 hour, the state of the discharged material when the foamable composition was discharged onto the palm was evaluated.
(Evaluation criteria)
◎: Discharged product foamed one after another although the foaming was small.
○ 1: Discharged material foamed.
２2: Discharged product foamed (bubble particles were fine).
X: The ejected matter hardly foamed.

<Cool feeling>
Using a discharge product in which the temperature of the content was adjusted to 25 ° C. by immersing in a constant temperature water bath adjusted to 25 ° C. for 1 hour, the foamable composition was discharged onto the palm of the hand, and the discharged material was pressed against the scalp. The cooling feeling upon application was evaluated.
(Evaluation criteria)
：: The discharged product had an appropriate cooling feeling and the cooling feeling was maintained for more than 3 minutes.
：: The discharged product had an appropriate cooling sensation, and the cooling sensation lasted for 2 to 3 minutes.
× 1: The ejected material had a strong cooling sensation immediately after coating, but did not maintain the cooling sensation.
× 2: Almost no cooling feeling was obtained from the discharged material.

<Massage effect>
Using a discharge product in which the temperature of the content was adjusted to 25 ° C. by immersing in a constant temperature water bath adjusted to 25 ° C. for 1 hour, the foamable composition was discharged onto the palm of the hand, and the discharged material was pressed against the scalp. The massage effect when applied was evaluated.
(Evaluation criteria)
A: Pleasant and pleasant stimulation was felt.
：: Mild stimulation was felt.
X: No irritation was felt.

  As shown in Table 3, the foamable compositions ejected by the ejected products of Examples 1 to 5 foamed one after another with the palm, a proper cooling feeling was maintained, and a comfortable massage effect on the scalp was obtained. Was. In the foaming composition of Example 6 in which a part of the hydrofluoroolefin having a boiling point of 5 to 30 ° C. was replaced with liquefied petroleum gas, the amount of dissolved carbon dioxide gas was reduced, and the cooling sensation immediately after the application was increased, but it continued. The time was shorter and the massage effect was milder. In the foamable composition of Example 7 using nitrogen gas instead of carbon dioxide gas, the ejected material had small bubbles and a mild stimulation was obtained.

  On the other hand, the foamable composition of Comparative Example 1 having a small content of hydrofluoroolefin having a boiling point of 5 to 30 ° C. was foamed, but did not provide a cooling feeling and a massage effect. In addition, the foamable composition of Comparative Example 2 having a high content of hydrofluoroolefin having a boiling point of 5 to 30 ° C did not foam and did not have a massage effect. In addition, the foamable composition of Comparative Example 3 using liquefied petroleum gas (butane) instead of hydrofluoroolefin having a boiling point of 5 to 30 ° C. provided a strong cooling sensation immediately after application, but the cooling sensation was maintained. No massage effect was obtained. The foamable composition of Comparative Example 4 using a hydrocarbon-based solvent (isopentane) having an equivalent boiling point instead of the hydrofluoroolefin having a boiling point of 5 to 30 ° C., although foaming was not obtained, a cooling feeling was not obtained, and massage was performed. No effect was obtained.

(Example 8) Hair restorer According to the following formulation, a stock solution base 2 containing no hydrofluoroolefin was prepared. 21.0 g (24.8% by mass, 30% by volume in the emulsified stock solution) of stock solution base material 2 and hydrofluoroolefin (1-chloro-3,3,3-triene) were placed in an aluminum pressure vessel (full volume 130 mL). Fluoropropene (* 1)) was charged with 63.7 g (75.2% by mass in the emulsified stock solution, 70% by volume), and a valve was attached to the opening of the pressure-resistant container and sealed. The container was shaken to emulsify the stock solution base 2 and the hydrofluoroolefin. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The filled carbon dioxide was 2.9 g, and the concentration of carbon dioxide dissolved in the liquid phase was 40.7 g / L.

<Undiluted substrate 2>
POE monolaurate (20) sorbitan (* 2) 1.0
POE (20) POP (8) cetyl ether (* 4) 0.2
Hydroxyethyl cellulose 0.1
Methyl paraben 0.1
Menthol 0.5
d-Camphor 0.5
Assembly extract 0.3
Dipotassium glycyrrhizinate 0.1
D-panthenol 0.3
Ethanol 5.0
Purified water 90.9
Talc 1.0
Total 100.0 (% by mass)
* 4: NIKKOL PBC-44 (trade name), manufactured by Nikko Chemicals Co., Ltd.

(Example 9) Antiperspirant According to the following formulation, a stock solution base 3 containing no hydrofluoroolefin was prepared. 20.6 g (24.4% by mass, 30% by volume in emulsified stock solution) of stock solution base material 3 in a pressure-resistant aluminum container (full volume 130 mL), and hydrofluoroolefin (1-chloro-3,3,3-triene) Fluoropropene (* 1)) was filled with 63.7 g (75.6% by mass in the emulsified stock solution, 70% by volume), and a valve was attached to the opening of the pressure-resistant container and sealed. The container was shaken to emulsify the stock solution base 2 and the hydrofluoroolefin. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of the filled carbon dioxide was 3.2 g, and the concentration of the carbon dioxide dissolved in the liquid phase was 45.0 g / L.

<Undiluted liquid substrate 3>
POE monolaurate (20) sorbitan (* 2) 1.0
POE monostearate (20) sorbitan (* 4) 0.5
Hydroxyethyl cellulose 0.1
Methyl paraben 0.1
Menthol 0.2
Isopropyl methyl phenol 1.0
Sulfolite zinc carbonate 0.3
Methylpentanediol dineopentanoate 3.0
Ethanol 10.0
Purified water 82.8
Talc 1.0
Total 100.0 (% by mass)

(Example 10) UV cut According to the following formulation, a stock solution base 4 containing no hydrofluoroolefin was prepared. 20.4 g (24.2% by mass, 30% by volume in emulsified stock solution) of stock solution base material 4 in a pressure-resistant aluminum container (full volume 130 mL), and hydrofluoroolefin (1-chloro-3,3,3-triene) Fluoropropene (* 1)) was filled with 63.7 g (75.8% by mass in the emulsified stock solution, 70% by volume), and a valve was attached to the opening of the pressure-resistant container and sealed. The container was shaken to emulsify the stock solution base 2 and the hydrofluoroolefin. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of the filled carbon dioxide was 3.0 g, and the concentration of the carbon dioxide dissolved in the liquid phase was 42.1 g / L.

<Undiluted substrate 4>
POE monolaurate (20) sorbitan (* 2) 1.0
POE monostearate (20) sorbitan (* 4) 0.5
Hydroxyethyl cellulose 0.1
Methyl paraben 0.1
Mixture of hexyl diethylaminohydroxybenzoyl benzoate and ethyl hexyl methoxycinnamate (* 5) 10.0
Methylpentanediol dineopentanoate 5.0
Decamethylcyclopentasiloxane 3.0
Methyl paraben 0.1
Ethanol 15.0
Purified water 58.7
Fine particle titanium oxide (* 6) 1.0
Fine particle zinc oxide (* 7) 5.0
Talc 0.5
Total 100.0 (% by mass)
* 5: Ubinar A Plus B (trade name), manufactured by BASF Japan Co., Ltd. * 6: MT-100AQ (trade name), manufactured by Teica Corporation * 7: MZ-500HP (trade name), manufactured by Teica Corporation

(Example 11) Insect repellent A stock solution base 5 containing no hydrofluoroolefin was prepared according to the following formulation. 24.5 g (29.3% by mass, 35% by volume in emulsified stock solution) of stock solution base material 5 in a pressure-resistant aluminum container (full volume 130 mL), hydrofluoroolefin (1-chloro-3,3,3-triene) Fluoropropene (* 1)) was charged with 59.2 g (70.7% by mass in the emulsified stock solution, 65% by volume), and a valve was attached to the opening of the pressure-resistant container and sealed. The container was shaken to emulsify the stock solution base 2 and the hydrofluoroolefin. Next, carbon dioxide gas was filled from the stem of the valve to dissolve it in the emulsified stock solution, and the equilibrium pressure was adjusted to 0.5 MPa (25 ° C.). The amount of carbon dioxide charged was 2.8 g, and the concentration of carbon dioxide dissolved in the liquid phase was 39.3 g / L.

<Stock solution 5>
POE monolaurate (20) sorbitan (* 2) 1.0
POE monostearate (20) sorbitan (* 3) 0.1
Hydroxyethyl cellulose 0.1
Methyl paraben 0.1
Menthol 0.5
N, N-diethyl-m-toluamide 10.0
Ethanol 5.0
Purified water 82.2
Talc 1.0
Total 100.0 (% by mass)

Using the foamable compositions prepared in Examples 8 to 11, the following evaluation methods were used to evaluate the state of the discharged material, the cooling feeling, and the massage effect. Table 4 shows the results. With respect to the massage effect, Example 8 evaluated the massage effect when the ejected matter was applied so as to be pressed against the scalp, and Examples 9 to 11 evaluated the massage effect when the ejected matter was spread on the arm.
(Evaluation criteria)
A: Pleasant and pleasant stimulation was felt.
：: Mild stimulation was felt.
X: No irritation was felt.

  As shown in Table 4, the foamable compositions discharged by the discharge products of Examples 8 to 11 foamed one after another with the palm of the hand, maintain a proper cooling feeling, and have a pleasant massage effect on the scalp or arm. Obtained.

Claims (4)

An emulsified stock solution containing water, a surfactant and a hydrofluoroolefin, and a compressed gas,
The foamable composition, wherein the hydrofluoroolefin has a boiling point of 5 to 30 ° C. and is contained in the emulsified stock solution at 40 to 90% by mass.   The foamable composition according to claim 1, wherein the hydrofluoroolefin is 1-chloro-3,3,3-trifluoropropene.   The compressed gas contains a highly soluble compressed gas containing at least one of carbon dioxide and nitrous oxide, and at 25 ° C. and 0.5 MPa, 28.0 g / L is added to the liquid phase of the foamable composition. The foamable composition according to claim 1, wherein the composition is dissolved.   The compressed gas contains a low-solubility compressed gas containing at least one of nitrogen, oxygen, air and hydrogen, and at 25 ° C. and 0.5 MPa, the liquid phase of the foamable composition has a volume of 3.0 g / g. 3. The foamable composition according to claim 1, wherein L or more is dissolved.