JP2016199288A - Aerosol product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol product capable of uniformly spraying an aerosol composition since immediately after start of spraying, and suppressing a residual quantity of the aerosol composition contained in the aerosol container.SOLUTION: There is provided an aerosol product 1 in which, an aerosol composition 2 containing an aqueous liquid concentrate containing a surfactant and water, and liquid gas in an emulsified state, is filled in an aerosol container 3, and the liquid gas is contained by 60-90 volume% in the aerosol composition. The aerosol container has an internal surface which contacts the aerosol composition and which is made of polyolefin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to aerosol products. More specifically, the present invention relates to an aerosol product capable of uniformly injecting an aerosol composition immediately after the start of injection and reducing the remaining amount of the aerosol composition in the aerosol container.

  Conventionally, an aerosol product in which an aerosol composition in which an aqueous stock solution containing water and a surfactant and a liquefied gas are emulsified is jetted is known (Patent Documents 1 and 2). These aerosol products are blended with a cellulosic polymer in order to form a crackling and foaming foam or to easily form icing.

  In addition, there is known an aerosol product in which an inner bag is provided in a container body in order to reduce the remaining amount of injection (Patent Document 3). This aerosol product uses an inner bag that returns to its original shape after shrinkage, and the aerosol composition is collected at the bottom of the container and aspirated through a dip tube. Moreover, such an inner bag is utilized when, for example, a metal aerosol container is filled with an aerosol composition capable of corroding metal.

JP 2003-335629 A JP 2012-1465 A JP 2002-308358 A

  However, the aerosol products described in Patent Document 1 and Patent Document 2 increase in viscosity when the aqueous stock solution is emulsified with liquefied gas, and the aerosol composition hardly moves even if the aerosol container is shaken up and down before injection. . Therefore, the aerosol composition tends to adhere to the inner surface of the aerosol container, is difficult to be taken into the valve even after an injection operation, and tends to remain in the aerosol container. In addition, the aerosol products described in Patent Document 1 and Patent Document 2 do not form a foam with weak foaming noise or freeze when the spraying operation is performed in a state where the aerosol composition is not uniformly emulsified due to insufficient stirring. It tends to be a projectile. Moreover, the aerosol composition of patent document 1 and patent document 2 does not have corrosivity in the first place. Therefore, it is not applied to an expensive aerosol container having an inner bag, such as the aerosol container described in Patent Document 3.

  The present invention has been made in view of such a conventional problem. The aerosol composition can be uniformly injected immediately after the start of injection, and the remaining amount of the aerosol composition in the aerosol container is reduced. It aims to provide an aerosol product that can be used.

  The aerosol product of the present invention that solves the above problems mainly includes the following configurations.

  (1) An aerosol product in which an aerosol composition in which an aqueous stock solution containing a surfactant and water and a liquefied gas are emulsified is filled in an aerosol container, and 60 to 90 volumes of the liquefied gas is contained in the aerosol composition. The aerosol container is an aerosol product wherein the inner surface of the aerosol container in contact with the aerosol composition is made of polyolefin.

  According to such a configuration, the aerosol composition contains 60 to 90% by volume of the liquefied gas, and the aqueous stock solution and the liquefied gas are emulsified. An aerosol composition containing a large amount of such a liquefied gas and emulsifying the aqueous stock solution and the liquefied gas has high viscosity. However, the inner surface of the aerosol container is made of polyolefin. Even if such an aerosol container is filled with a highly viscous aerosol composition, the aqueous concentrate is emulsified with a specific volume of liquefied gas to exert a lubricating action, for example, upside down, etc. By a simple operation, the aerosol composition easily moves so as to slide in the aerosol container. As a result, even if the aerosol composition is left standing for a long time in stores or at home and the aqueous concentrate and the liquefied gas are separated in the aerosol container, it can be stirred before use to form a uniform emulsion. it can. Therefore, the aerosol product can uniformly spray the aerosol composition immediately after the start of spraying, and can prevent the aerosol composition from adhering to the inner surface of the aerosol container to reduce the remaining amount of the aerosol composition.

  (2) The aerosol container includes a container main body and an inner bag provided in the container main body, and the inner bag is a single-layer inner bag made of polyolefin, or the innermost layer is a polyolefin layer. The aerosol product according to (1), which is a laminated inner bag.

  According to such a configuration, the aerosol container includes the inner bag whose inner surface is made of polyolefin. The inner bag may be manufactured by blow molding, for example, and may be a single-layer polyolefin inner bag or a laminated inner bag whose innermost layer is a polyolefin layer. As described above, as the aerosol container, inner bags having various layer configurations are selected, and the degree of freedom in product design considering flexibility, gas barrier properties, and the like is high. In addition, such an inner bag passes through a part of the liquefied gas and moves to the space between the container body and the inner bag, and when the aerosol composition in the inner bag is reduced, the inner bag is contracted to further reduce the remaining amount. Can be reduced.

  (3) The aerosol product according to (1) or (2), wherein the liquefied gas contains 20 to 100% by volume of an aliphatic hydrocarbon having 3 to 5 carbon atoms in the liquefied gas.

  According to such a configuration, the aerosol composition contains the aliphatic hydrocarbon having 3 to 5 carbon atoms in the liquefied gas, thereby containing the aliphatic hydrocarbon having 3 to 5 carbon atoms in the aerosol container. It is easy to act as a lubricant for sliding the inner surface (polyolefin). Therefore, when the aerosol composition is filled in a container body to be described later, the fluidity of the aerosol composition becomes higher with respect to the inner surface of the container body. Further, the liquefied gas is volatilized when injected outside. Therefore, the liquefied gas has no influence on the projectile, unlike, for example, a liquid lubricant or a solid lubricant.

  (4) The aerosol composition according to any one of (1) to (3), wherein the aerosol composition further includes a water-soluble polymer.

  According to such a configuration, the aerosol composition exhibits the effect of increasing the sound generated at the time of bubble breakage and the effect of stably maintaining the injected foam, for example, by incorporating a water-soluble polymer. It's easy to do. On the other hand, the viscosity of an aerosol composition is likely to increase due to the incorporation of a water-soluble polymer. However, since the aerosol product is filled in an aerosol container whose inner surface is made of polyolefin, even when such a higher viscosity aerosol composition is filled, the aerosol product can be easily turned upside down, for example. By an easy operation, the aerosol composition can be easily moved in the aerosol container. As a result, the aerosol composition can form a uniform emulsion before use. Therefore, the aerosol product can uniformly spray the aerosol composition immediately after the start of spraying, and can reduce the remaining amount of the aerosol composition in the aerosol container.

  (5) The aerosol product according to any one of (1) to (4), wherein the aerosol container is for inverted injection.

  According to such a configuration, the aerosol composition can easily move the aerosol composition to the position of the valve, for example, by inverting the top and bottom. Therefore, the user can stir the aerosol composition just by inverting the aerosol product that has been left standing in an upright state, for example, by spraying the aerosol composition onto the palm or the like. Convenience is good. The valve can also take the aerosol composition directly into the housing without going through a tube. Therefore, the aerosol product can inject an aerosol composition with a uniform composition immediately after the start of injection.

  ADVANTAGE OF THE INVENTION According to this invention, the aerosol product which can inject an aerosol composition uniformly immediately after an injection start, and can reduce the residual amount of the aerosol composition in an aerosol container can be provided.

FIG. 1 is a schematic cross-sectional view of an aerosol product according to an embodiment of the present invention.

  An aerosol product according to an embodiment of the present invention is an aerosol product in which an aerosol composition in which an aqueous stock solution containing a surfactant and water and a liquefied gas are emulsified is filled in an aerosol container. The liquefied gas is contained in the aerosol composition in an amount of 60 to 90% by volume. The inner surface of the aerosol container that contacts the aerosol composition is made of polyolefin. Hereinafter, each configuration will be described.

[Aerosol composition]
<Aqueous stock solution>
The aqueous stock solution is a liquid component that is emulsified with the liquefied gas in a state where the container body of the aerosol container described later is filled, and includes a surfactant and water. When the aqueous stock solution is jetted to the outside together with the liquefied gas, it is cooled by the heat of vaporization of the liquefied gas.

  The content of the aqueous stock solution is preferably 10% by volume or more in the aerosol composition, and more preferably 15% by volume or more. Further, the content of the aqueous stock solution is preferably 40% by volume or less in the aerosol composition, and more preferably 35% by volume or less. When the content of the aqueous stock solution is less than 10% by volume, it tends to be difficult to emulsify with the liquefied gas. On the other hand, when the content of the aqueous stock solution exceeds 40% by volume, the aerosol composition tends to adhere to the inner surface of the aerosol container, and the effect of easily moving on the inner surface of the aerosol container tends to be difficult to obtain.

(Surfactant)
The surfactant is a component for emulsifying the aqueous stock solution and the liquefied gas in the container body. The aerosol composition emulsified with a surfactant, when jetted, keeps the liquefied gas in the aqueous stock solution for a long time, so that the foaming sound generated when the foam bounces or the liquefied gas vaporizes. Heat is easily transferred to the water in the aqueous stock solution and is likely to freeze.

  Examples of the surfactant include polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbit fatty acid ester, Nonionic surfactants such as polyglycerin fatty acid esters and polyoxyethylene hydrogenated castor oil, silicone surfactants, natural surfactants and the like are preferably used.

  Examples of the polyoxyethylene polyoxypropylene alkyl ether include POE / POP cetyl ether and POE / POP decyl tetradecyl ether. Examples of the polyoxyethylene alkyl ether include POE cetyl ether, POE stearyl ether, POE oleyl ether, POE lauryl ether, POE behenyl ether, POE octyldodecyl ether, POE isocetyl ether, POE isostearyl ether and the like. Examples of polyoxyethylene fatty acid esters include POE monolaurate, POE monostearate, POE monooleate and the like. Examples of the polyoxyethylene sorbitan fatty acid ester include PEG-20 sorbitan cocoate, POE sorbitan monolaurate, POE sorbitan monostearate, POE sorbitan monooleate and the like. Examples of polyoxyethylene glycerin fatty acid esters include POE glyceryl monostearate and POE glyceryl monooleate. Examples of the polyoxyethylene sorbite fatty acid ester include POE sorbite monolaurate, POE sorbite tetrastearate, POE sorbite tetraoleate and the like. Polyglyceryl fatty acid esters include decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monooleate, decaglyceryl dioleate, hexaglyceryl monolaurate, hexaglyceryl monostearate, hexa Examples thereof include glyceryl monooleate. Examples of the polyoxyethylene hydrogenated castor oil include PEG-40 hydrogenated castor oil, PEG-60 hydrogenated castor oil, and PEG-80 hydrogenated castor oil. Examples of silicone surfactants include polyoxyethylene / methylpolysiloxane copolymers, polyoxypropylene / methylpolysiloxane copolymers, poly (oxyethylene / oxypropylene) / methylpolysiloxane copolymers, and the like. . Examples of natural surfactants include surfactin sodium, cyclodextrin, lecithin and the like.

  The content of the surfactant is not particularly limited as long as the aqueous stock solution and the liquefied gas can be appropriately emulsified. As such content, it is preferable that it is 0.1 mass% or more in an aqueous | water-based stock solution, and it is preferable that it is 0.3 mass% or more. In addition, the content of the surfactant is preferably 15% by mass or less in the aqueous stock solution, and more preferably 10% by mass or less. When the content of the surfactant is less than 0.1% by mass, the aqueous stock solution and the liquefied gas tend to be difficult to be properly emulsified. On the other hand, when the content of the surfactant is more than 15% by mass, the surfactant tends to remain on the application site after the aerosol composition is sprayed on the application site, and the use feeling such as stickiness tends to deteriorate.

(water)
Water is the main solvent of the aqueous stock solution, and forms a liquid film of bubbles formed after being jetted, or is cooled and frozen by the heat of vaporization of the liquefied gas. Examples of water include purified water, ion exchange water, physiological saline, deep sea water and the like.

  The water content is preferably 50% by mass or more in the aqueous stock solution, more preferably 55% by mass or more, and further preferably 60% by mass or more. Further, the water content is preferably 99.5% by mass or less, more preferably 99.3% by mass or less, and further preferably 99.0% by mass or less in the aqueous stock solution. When the water content is less than 50% by mass, the aqueous stock solution and the liquefied gas tend to be difficult to emulsify. On the other hand, when the content of water exceeds 99.5% by mass, it tends to be difficult to appropriately contain a surfactant and an optional component appropriately contained.

<Liquefied gas>
The liquefied gas is a liquid component having a vapor pressure that is emulsified with the aqueous stock solution in a pressurized and sealed state in the aerosol container. Further, the liquefied gas is contained for the purpose of adjusting the size of the propellant and the momentum of jetting, cooling the propellant and giving a feeling of cooling to the application site, and the like.

  Examples of the liquefied gas include propane, normal butane, isobutane, normal pentane, isopentane, and mixtures thereof, which are aliphatic hydrocarbons having 3 to 5 carbon atoms, trans-1,3,3,3-tetrafluoroprop-1 Examples include hydrofluoroolefins such as -ene (HFO-1234ze), trans-2,3,3,3-tetrafluoroprop-1-ene (HFO-1234yf), dimethyl ether, and mixtures thereof. Among these, an aliphatic hydrocarbon having 3 to 5 carbon atoms having a vapor pressure of 0.05 to 0.8 MPa (gauge pressure) at 25 ° C. is a lubricant that slides on the inner surface (polyolefin) of the aerosol container. It is preferable from the point that it is easy to act as. Therefore, when the aerosol composition is filled in a container body to be described later, the fluidity of the aerosol composition becomes higher with respect to the inner surface of the container body. Further, the liquefied gas is volatilized when injected outside. Therefore, the liquefied gas has no influence on the projectile, unlike, for example, a liquid lubricant or a solid lubricant.

  The aerosol composition of this embodiment contains 60-90 volume% of liquefied gas in an aerosol composition. The content of the liquefied gas may be 60% by volume or more in the aerosol composition, and is preferably 65% by volume or more. Further, the content of the liquefied gas may be 90% by volume or less in the aerosol composition, and is preferably 85% by volume or less. When the content of the liquefied gas is less than 60% by volume, the aerosol composition tends to adhere on the inner surface of the aerosol container, and it tends to be difficult to obtain a lubricating action that facilitates movement on the inner surface of the aerosol container. On the other hand, when the content of the liquefied gas exceeds 90% by volume, it tends to be difficult to emulsify with the aqueous stock solution.

  The liquefied gas preferably contains 20 to 100% by volume of an aliphatic hydrocarbon having 3 to 5 carbon atoms in the liquefied gas. The content of the aliphatic hydrocarbon having 3 to 5 carbon atoms is preferably 20% by volume or more and more preferably 30% by volume or more in the liquefied gas. Moreover, it is preferable that content of C3-C5 aliphatic hydrocarbon is 100 volume% or less in liquefied gas. When the content of the aliphatic hydrocarbon having 3 to 5 carbon atoms is less than 20% by volume, the aerosol composition tends to adhere on the inner surface of the aerosol container and has a lubricating action that facilitates movement on the inner surface of the aerosol container. There is a tendency to become difficult to be.

  In addition, compressed gas, such as nitrogen, air, a carbon dioxide, nitrous oxide, may be used for an aerosol composition as a pressurizing agent.

(Optional component)
Next, the arbitrary component which the aerosol composition of this embodiment contains suitably is demonstrated. The aerosol composition of the present embodiment may appropriately contain various optional components in addition to the above-described components. For example, the aqueous stock solution may contain water-soluble polymers, alcohols, active ingredients, oily solvents, powders and the like in addition to the surfactant and water.

(Water-soluble polymer)
The water-soluble polymer adjusts the viscosity of the aqueous stock solution, stabilizes the emulsification of the aqueous stock solution and the liquefied gas, keeps the liquefied gas in the propellant longer, makes it easier to cool the aqueous stock solution, It is contained appropriately for the purpose of adjusting the easiness to dissolve the sheath. More specifically, the aerosol composition, when blended with a water-soluble polymer, for example, tends to exhibit the effect of increasing the sound generated when foam breaks and the effect of stably maintaining the injected foam. By the way, the viscosity of an aerosol composition is likely to increase due to the incorporation of a water-soluble polymer. However, the aerosol composition of the present embodiment is a container in which an aqueous stock solution is emulsified with a liquefied gas containing a specific volume of an aliphatic hydrocarbon having 3 to 5 carbon atoms, and further, as described later, the inner surface is made of polyolefin. The body is filled. Therefore, even if the obtained aerosol product is filled with an aerosol composition whose viscosity has been increased by blending a water-soluble polymer, the aerosol product can be obtained by a simple operation such as turning upside down. Easy to move the composition in the aerosol container. As a result, the aerosol composition is easily agitated to form a uniform emulsion, further moves to the valve as appropriate, and is easily taken in and injected into the valve. Therefore, the aerosol product can uniformly spray the aerosol composition immediately after the start of spraying, and can reduce the remaining amount of the aerosol composition in the aerosol container.

  Examples of the water-soluble polymer include cellulosic polymers and gums. Examples of the cellulosic polymer include hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose and the like. Examples of gums include xanthan gum, carrageenan, gum arabic, tragacanth gum, cationized guar gum, guar gum, gellan gum and the like. In addition, examples of the water-soluble polymer include carboxymethyl dextran sodium, dextrin, gelatin, pectin, starch, corn starch, wheat starch, sodium alginate, modified potato starch, carboxyvinyl polymer, and the like.

  When the water-soluble polymer is contained, the content in the aqueous stock solution is preferably 0.01% by mass or more, and preferably 0.05% by mass or more. In addition, the water-soluble polymer is preferably 5% by mass or less, more preferably 3% by mass or less in the aqueous stock solution. When the content of the water-soluble polymer is less than 0.01% by mass, the effect of containing the water-soluble polymer tends to be difficult to obtain. On the other hand, when the content of the water-soluble polymer exceeds 5% by mass, the viscosity becomes so high that the aqueous stock solution and the liquefied gas tend not to be emulsified, and the usability tends to deteriorate.

(Alcohol)
Alcohols are appropriately contained as a solvent such as an active ingredient that does not dissolve in water. Examples of the alcohol include monovalent alcohols having 2 to 3 carbon atoms such as ethanol and isopropanol, and divalent and trivalent polyhydric alcohols such as ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, and glycerin. Illustrated.

  When alcohol is contained, the content in the aqueous stock solution is preferably 0.5% by mass or more, and more preferably 1% by mass or more. Moreover, it is preferable that it is 30 mass% or less in aqueous | water-based stock solution, and, as for content of alcohol, it is more preferable that it is 25 mass% or less. When content of alcohol is less than 0.5 mass%, there exists a tendency for the effect by containing alcohol to be hard to be acquired. On the other hand, when the content of alcohol exceeds 30% by mass, the aqueous stock solution and the liquefied gas tend to be difficult to be emulsified.

(Active ingredient)
The active ingredient is appropriately contained in order to give a desired effect to the application site such as skin and hair.

  Active ingredients include refreshing agents, antipruritic agents, anti-inflammatory analgesics, antifungal agents, astringents, anti-inflammatory agents, local anesthetics, antihistamines, blood circulation promoters, moisturizers, UV absorbers, UV scattering agents, bactericidal disinfectants Examples include amino acids, vitamins, antiperspirant ingredients, pest repellents, deodorant ingredients, cleaning agents, treatment agents, and fragrances.

  Examples of the refreshing agent include l-menthol, camphor, mint oil and the like. Examples of antipruritic agents include crotamiton and d-camphor. Examples of anti-inflammatory analgesics include methyl salicylate, indomethacin, piroxicam, felbinac, ketoprofen and the like. Examples of the antifungal agent include oxyconazole, clotrimazole, sulconazole, bifonazole, miconazole, isoconazole, econazole, thioconazole, butenafine and their hydrochlorides, nitrates, acetates and the like. Examples of astringents include allantoin hydroxyaluminum, tannic acid, citric acid, lactic acid and the like.

  Examples of anti-inflammatory agents include allantoin, glycyrrhetinic acid, dipotassium glycyrrhizinate, and azulene. Examples of the local anesthetic include dibucaine hydrochloride, tetracaine hydrochloride, lidocaine, lidocaine hydrochloride and the like. Examples of the antihistamine include diphenhydramine, diphenhydramine hydrochloride, chlorpheniramine maleate and the like. Examples of the blood circulation promoter include chili pepper tincture, assembly extract, garlic extract, benzyl nicotinate, minoxidil, carpronium chloride, and the like.

  Examples of the humectant include collagen, xylitol, sorbitol, aloe extract, ginkgo biloba extract, hyaluronic acid, sodium hyaluronate, sodium lactate, DL-pyrrolidone carboxylate, urea and the like. Examples of ultraviolet absorbers include hexyl diethylaminohydroxybenzoylbenzoate, ethylhexyl dimethylaminobenzoate, paraaminobenzoic acid, ethyl paraaminobenzoate, 2-ethylhexyl paradimethylaminobenzoate, ethylhexyl salicylate, ethylhexyl methoxycinnamate, and diisopropylcinnamic acid. Examples thereof include methyl, octocrylene, oxybenzone-3, oxybenzone-4, dimethoxybenzylidenedioxoimidazolidine ethylhexyl propionate, and phenylbenzimidazole sulfonic acid.

  Examples of the ultraviolet scattering agent include titanium oxide and zinc oxide. Examples of the bactericidal disinfectant include p-hydroxybenzoate ester, sodium benzoate, potassium sorbate, phenoxyethanol, benzalkonium chloride, benzethonium chloride, chlorhexidine chloride and the like. Examples of amino acids include glycine, alanine, leucine, aspartic acid, glutamic acid, arginine and the like. Examples of vitamins include tocopherol and tocopherol acetate, calcium pantothenate, magnesium ascorbate phosphate, sodium ascorbate and the like. Examples of the antiperspirant component include chlorohydroxyaluminum, zinc paraphenolsulfonate, aluminum chloride, aluminum sulfate, aluminum citrate, aluminum acetate, and aluminum phenolsulfonate. Pest repellents include N, N-diethyl-m-toluamide (diet), herbal extracts and the like. Examples of the deodorant component include green tea extract, persimmon tannin, silver and the like.

  Examples of the detergent include amphoteric surfactants, anionic surfactants, amino acid surfactants and the like.

  Examples of amphoteric surfactants include betaine types and amine oxide types. Betaine-type double-sided surfactants include lauryl dimethylaminoacetic acid betaine (lauryl betaine), stearyl betaine, lauric acid amidopropyl betaine, lauryl hydroxysulfobetaine, stearyldimethylaminoacetic acid betaine, dodecylaminomethyldimethylsulfopropylbetaine, octadecylaminomethyldimethyl Examples include alkylbetaines such as sulfopropylbetaine, amide propylbetaine cocoate, fatty acid amidepropylbetaine such as coconut fatty acid amidepropyldimethylaminoacetic acid betaine (cocamidopropylbetaine), and cocamidopropylhydroxysultain. Examples of the amine oxide type double-sided activator include alkylimidazole types such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, amino acid types such as sodium lauroylglutamate, potassium lauroylglutamate, lauroylmethyl-β-alanine, etc. , Lauryldimethylamine N-oxide, oleyldimethylamine N-oxide and the like.

  Examples of the anionic surfactant include fatty acid soaps, alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, and the like. Examples of the amino acid surfactant include N-acyl glutamate, N-acyl glutamic acid, N-acyl glycine salt, N-acyl alanine salt and the like. Examples of N-acyl glutamate include N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine, N-coconut oil fatty acid acyl-potassium L-glutamate, N-coconut oil fatty acid acyl-sodium L-glutamate, N-lauroyl- L-glutamate triethanolamine, N-lauroyl-L-potassium glutamate, N-lauroyl-L-sodium glutamate, N-myristoyl-L-glutamate potassium, N-myristoyl-L-glutamate and N-stearoyl-L-glutamate Sodium and the like are exemplified. Examples of N-acyl glutamic acid include N-coconut oil fatty acid acyl-L-glutamic acid, N-lauroyl-L-glutamic acid, N-stearoyl-L-glutamic acid and the like. Examples of the N-acyl glycine salt include N-coconut oil fatty acid acylglycine potassium and N-coconut oil fatty acid acylglycine sodium. Examples of the N-acylalanine salt include N-coconut oil fatty acid acyl-DL-alanine triethanolamine.

  Examples of the treatment agent include a cationic surfactant. Examples of the cationic surfactant include stearyl trimethyl ammonium chloride and cetyl trimethyl ammonium chloride.

  When the active ingredient is contained, the content in the aqueous stock solution is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. The content of the active ingredient is preferably 30% by mass or less, more preferably 25% by mass or less in the aqueous stock solution. When content of an active ingredient is less than 0.1 mass%, there exists a tendency for the effect by containing an active ingredient to become difficult to be acquired. On the other hand, when content of an active ingredient exceeds 30 mass%, there exists a tendency for an aqueous undiluted | stock solution and liquefied gas to become difficult to emulsify.

(Oil-based solvent)
The oily solvent is appropriately contained for the purpose of adjusting the state of the propellant, imparting moisture to the application site (for example, skin, etc.) to improve the feeling of use, and dissolving an active ingredient that is difficult to dissolve in water.

  Examples of oily solvents include fats and oils, fatty acids, higher alcohols, ester oils, silicone oils, hydrocarbons, and mixtures thereof.

  Examples of the oils and fats include olive oil, camellia oil, corn oil, castor oil, safflower oil, jojoba oil, and coconut oil. Examples of fatty acids include myristic acid, stearic acid, oleic acid and the like. Examples of the higher alcohol include cetyl alcohol, oleyl alcohol, and isostearyl alcohol. Ester oils include isopropyl myristate, isopropyl palmitate, cetyl isooctanoate, methylpentanediol dineopentanoate, diethylpentanediol dineopentanoate, neopentyl glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, propylene dilaurate Glycol, ethylene glycol distearate, propylene glycol monostearate, propylene glycol monooleate, ethylene glycol monostearate, glyceryl tri-2-ethylhexanoate, glycerin tri (capryl / capric acid), isononyl isononanoate, isotridecyl isononanoate Examples thereof include diethoxyethyl succinate, diisostearyl malate and the like. Silicone oils include dimethicone, methylpolysiloxane, cyclopentasiloxane, cyclohexasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, tetrahydrotetramethylcyclotetrasiloxane, octa Examples include methyltrisiloxane, decamethyltetrasiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, and the like. Examples of the hydrocarbon include liquid paraffin and isoparaffin.

  When the oily solvent is contained, the content in the aqueous stock solution is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. Further, the content of the oily solvent is preferably 20% by mass or less, more preferably 10% by mass or less in the aqueous stock solution. When content of an oily solvent is less than 0.1 mass%, there exists a tendency for the effect by containing an oily solvent to become difficult to be acquired. On the other hand, when content of an oil-based solvent exceeds 20 mass%, there exists a tendency for an aqueous | water-based stock solution and a liquefied gas to become difficult to emulsify.

(powder)
Powder is a particle (powder) dispersed in an aqueous stock solution, which promotes contact between the aqueous stock solution and the liquefied gas, and makes it easier to emulsify the aqueous stock solution and liquefied gas. It is appropriately contained for the purpose of improving the feeling of use, such as improving slipping or absorbing sebum when the application site is skin.

  As powder, talc, silica, kaolin, magnesium carbonate, calcium carbonate, zinc silicate, magnesium silicate, aluminum silicate, calcium silicate, zeolite, ceramic powder, charcoal powder, nylon powder, silk powder, urethane powder, silicone Examples thereof include powder, polyethylene powder, silica beads, glass beads, and resin beads.

  When the powder is contained, the content in the aqueous stock solution is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more. Further, the content of the powder is preferably 10% by mass or less, more preferably 5% by mass or less in the aqueous stock solution. When the content of the powder is less than 0.05% by mass, the effect of containing the powder tends to be difficult to obtain. On the other hand, when the content of the powder exceeds 10% by mass, when the aerosol product filled with the aerosol composition is stored in a stationary state for a long period of time, it tends to be hard to disperse even if shaken in the container body and shaken. is there.

[Aerosol container]
Next, an aerosol container filled with the aerosol composition will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view of an aerosol product 1 of the present embodiment. In the aerosol product 1, an aerosol composition 2 is filled in an aerosol container 3. The aerosol container 3 includes an injection button 6 in which a container body 4 filled with the aerosol composition (aerosol composition 2), a valve 5 attached to the container body 4, and an injection hole 61 for injecting the aerosol composition 2 are formed. With. Hereinafter, each configuration will be described. In addition, as for the structure of the aerosol product 1, the inner peripheral surface 42S which contacts the aerosol composition 2 with which it filled as mentioned later should just be a product made from polyolefin. Therefore, the configuration of the aerosol product 1 shown below is an example, and the design can be changed as appropriate.

(Container body 4)
The container body 4 is a pressure-resistant container for filling the aerosol composition 2 in a pressurized and sealed state. The container body 4 may have a general-purpose shape. The container body 4 of the present embodiment is a bottomed cylinder having an opening at the top. The opening is a filling port for filling the aqueous stock solution. The container main body 4 becomes the aerosol container 3 by attaching a valve 5 described later to the opening and closing it. The container body 4 includes a substantially cylindrical outer cylinder 41 and an inner bag 42 provided inside the outer cylinder 41.

  The material of the outer cylinder 41 is not particularly limited. Examples of such materials include metals such as aluminum and tin, polyesters such as polyethylene terephthalate, polyolefins such as polyethylene and polypropylene, various synthetic resins such as polyamide such as nylon, and pressure-resistant glass.

  The inner bag 42 is a bag-like container disposed inside the outer cylinder 41. The inner bag 42 is filled with the aerosol composition 2 described above. The inner bag 42 only needs to have an inner peripheral surface 42S that is in contact with the aerosol composition 2 made of polyolefin. Examples of the polyolefin include polyethylene and polypropylene. Physical properties such as the degree of monomer polymerization and molecular weight in the polyolefin are appropriately selected based on desired properties (hardness of the inner bag 42, air permeability, gas permeability, transparency, etc.).

  Even if such an aerosol container 3 is filled with the highly viscous aerosol composition 2, the aerosol composition 2 can be applied to the inner peripheral surface 42S by a simple operation such as inverting the top and bottom. Easy to move like sliding. As a result, the aerosol composition 2 can be uniformly emulsified before use even if the aqueous stock solution and the liquefied gas are separated, move to the valve 5 described later as appropriate, and be easily taken in and injected into the valve 5. Therefore, the aerosol product 1 can uniformly spray the aerosol composition 2 immediately after the start of spraying, and can reduce the remaining amount of the aerosol composition 2 in the aerosol container 3.

  The aerosol product 1 of the present embodiment is made of polyethylene in which the inner bag 42 itself is a single layer. Instead, the inner bag 42 may have a configuration in which a plurality of layers are stacked. In the case of the laminated structure, the inner bag 42 may be made of polyolefin as the innermost layer, and the other layers are made of synthetic resin such as ethylene-vinyl alcohol copolymer resin, polyamide, fluororesin in addition to polyolefin. It may be. Therefore, the aerosol container 3 is selected from the inner bags 42 having various layer configurations, and has a high degree of freedom in product design considering flexibility and gas barrier properties. Further, in the aerosol product 1 including the inner bag 42, a part of the liquefied gas passes through the inner bag 42 and moves between the outer cylinder 41 and the inner bag 42, and the aerosol composition in the inner bag 42 is reduced. When the number is reduced, the inner bag 42 can be contracted to reduce the remaining amount.

(Valve 5)
The valve 5 is a member that is attached to the opening of the container body 4 and seals the inside of the container body 4, and a valve mechanism 51 that can switch communication / blocking between the container body 4 and the outside by moving up and down. And a housing 52 in which a predetermined internal space in which the valve mechanism 51 is provided is formed. The valve mechanism 51 includes a stem 53 having a stem hole 55 that communicates with the outside by being pushed down, a stem rubber 54 that seals the stem hole 55, and a spring that constantly urges the stem 53 vertically downward from below. Prepare. An intake port 56 is formed in the side peripheral wall of the housing 52 to communicate the internal space of the housing 52 with the inside of the container main body 4 (inner bag 42). For example, when the aerosol container 3 is turned upside down, the aerosol composition 2 slides on the inner peripheral surface 42S, reaches the periphery of the intake port 56, and enters the inner space of the housing 52 from the intake port 56. It is captured. Next, when the stem hole 55 is opened by the operation of the valve 5, the aerosol composition 2 passes through the stem hole 55, passes through the passage in the stem 53, and is sent to the injection button 6.

  The position of the intake port 56 is not limited to the side peripheral wall of the housing 52. The intake 56 may be a lower part of the housing 52. When the intake port 56 is provided in the side peripheral wall of the housing 52, the aerosol product 1 that employs such an aerosol container 3 is preferably used for inverted injection. When used for inverted injection, the intake 56 is preferably provided at the upper position of the side peripheral wall of the housing 52 as much as possible. On the other hand, the intake 56 may be provided at the bottom of the housing 52. In this case, for example, by further providing a dip tube at the bottom of the housing 52, the aerosol product 1 employing such an aerosol container 3 is preferably used for upright injection.

  The method for filling the aerosol container 2 with the aerosol composition 2 is not particularly limited. As an example, there is a method in which an aqueous stock solution is filled into the inner bag 42 from the opening of the aerosol container 3, the opening is closed by the valve 5, and a liquefied gas is filled from the valve mechanism 51 of the valve 5 to emulsify the aqueous stock solution. Adopted.

(Jet button 6)
The injection button 6 is a member for injecting the aerosol composition 2 taken in via the valve 5. The injection button 6 includes a substantially cylindrical main body portion 62 attached to the tip of the stem 53, an operation portion 63 extending in a substantially horizontal direction from the peripheral surface of the main body portion 62, and an operation portion on the peripheral surface of the main body portion 62. 63 and a hinge portion 64 provided on the opposite side to 63. The main body 62 includes an injection passage through which the aerosol composition 2 passes. One end of the injection passage communicates with the passage in the stem 53 and the other end is formed with an injection hole 61 for injecting the aerosol composition 2. The hinge part 64 has one end connected to the main body part 62 and the other end connected to the container main body 4.

[How to use aerosol products]
Next, an example of a method for using the aerosol product 1 of the present embodiment will be described. The aerosol product 1 of this embodiment is an aerosol container 3 for inverted injection. As shown in FIG. 1, the aerosol product 1 has an inner bag 42 filled with a predetermined amount of the aerosol composition 2. In such an upright state, the intake port 56 of the valve 5 opens to the gas phase portion of the inner bag 42, and the housing 52 is filled with the gas portion of the liquefied gas.

  First, the aerosol product 1 is turned upside down so that the outer cylinder 41 is gripped by the user and the injection button 6 is in the lower position with respect to the container body 4. In such an inverted state, the aerosol composition 2 filled in the inner bag 42 moves so as to slide on the inner peripheral surface 42S of the polyolefin inner bag 42. The aerosol product 1 may be turned upside down after being shaken up and down several times. As a result, the aerosol composition 2 is stirred and uniformly emulsified in the inner bag 42, reaches the periphery of the intake port 56, and is taken into the internal space of the housing 52 from the intake port 56. When the operation part 63 is pushed down by the user in this state, the injection button 6 rotates with the other end of the hinge part 64 (the connection point with the container body 4) as a fulcrum, and the stem 53 is moved downward (the container body 4 side). ). Thereby, the stem hole 55 is opened and the aerosol composition 2 is injected.

  As described above, the aerosol product 1 of the present embodiment moves so that the aerosol composition 2 slides on the inner peripheral surface 42 </ b> S in accordance with the state during use, and reaches the intake 56. At this time, the aerosol composition 2 is less likely to adhere to the inner peripheral surface 42S and easily moves in a lump. As a result, even when the aerosol product 1 is filled with the highly viscous aerosol composition 2, it is possible to uniformly emulsify the aqueous stock solution and the liquefied gas by a simple operation such as inverting the top and bottom. In addition, the aerosol composition 2 can reach the intake 56 and be taken in and sprayed. Accordingly, the aerosol product 1 can uniformly spray the aerosol composition 2 immediately after the start of spraying. In addition, since the aerosol composition 2 can move so as to slide on the inner peripheral surface 42S, it is difficult to adhere to the inner peripheral surface 42S, and many are easily taken in and injected from the valve 5. Therefore, the aerosol product 1 can reduce the remaining amount of the aerosol composition 2 in the aerosol container 3.

  As mentioned above, although one Embodiment of this invention was described with reference to drawings, this invention can employ | adopt the following modified embodiments, for example.

  (1) In the said embodiment, the container main body provided with the inner bag made from polyolefin was illustrated. Instead of this, the aerosol product of the present invention may omit the inner bag and form a polyolefin layer on the inner peripheral surface of the outer cylinder. According to this modification, for example, an outer cylinder made of polyolefin may be used, and a polyolefin sheet is laminated on the inner surface of a metal outer cylinder, or polyolefin powder is statically applied to the inner surface of a metal outer cylinder. An electropainted material or the like may be used. Thereby, the number of parts is omitted and the cost of the aerosol product is reduced.

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

Example 1
Aqueous stock solution 1 was prepared according to the following formulation. The prepared aqueous stock solution 1 is filled in an inner bag of a container main body having an aluminum outer cylinder and a polyethylene inner bag shown in FIG. An inverted valve equipped with the above was fixed, and an aliphatic hydrocarbon having 4 carbon atoms (* 1) as a liquefied gas was filled so as to have the ratio (volume%) shown in Table 1. Thereafter, the container was shaken up and down to emulsify the aqueous stock solution 1 and the liquefied gas to prepare an aerosol composition.

<Aqueous stock solution 1>
Polyoxyethylene sorbitan monooleate 1.0
Hydroxyethyl cellulose 0.5
Ethanol 20.0
Cyclomethicone 3.0
Methylparaben 0.1
Talc 0.5
Purified water 74.9
Total 100.0 (mass%)

(Examples 2-5 and Comparative Examples 1-2)
An aerosol composition was prepared in the same manner as in Example 1 except that the ratio of the aqueous stock solution 1 and the liquefied gas was changed to the ratio shown in Table 1.

(Examples 6 to 10)
An aerosol composition was prepared in the same manner as in Example 1 except that the ratio of the aqueous stock solution 1 and the liquefied gas was changed to the ratio shown in Table 2.

(Comparative Example 3)
An aerosol product was produced in the same manner as in Example 1 except that the container body was not provided with an inner bag and the aluminum composition was filled in an aluminum outer cylinder (having a polyamide-imide coat on the inner surface).

(Comparative Example 4)
An aerosol product was produced in the same manner as in Example 1 except that the container body was not equipped with an inner bag, and an aluminum composition was filled in an aluminum outer cylinder (equipped with an epoxyphenol coating on the inner surface).

(Comparative Example 5)
An aerosol product was produced in the same manner as in Example 1 except that the container body was not provided with an inner bag and an outer cylinder made of polyethylene terephthalate was filled with the aerosol composition.

  On the container body filled with each aerosol composition obtained in Examples 1 to 10 and Comparative Examples 1 to 5, an injection button (inverted spout, diameter of injection hole: 3 mm, provided with a linear internal passage) is provided. Each was installed to produce an aerosol product. About the obtained aerosol product, the following evaluation methods evaluated the mobility of the aerosol composition, the state of the projectile, and the remaining amount of the aerosol composition. The results are shown in Table 2.

1. Mobility of aerosol composition When the aerosol product with the aerosol composition placed at the bottom in a standing room at 25 ° C in an upright state for one week is turned upside down and inverted, the aerosol composition The presence or absence of movement to the valve side was evaluated. When it did not move, it returned to the upright state, and it was inverted again, and the presence or absence of the movement was evaluated. The number of movements was evaluated based on the following evaluation criteria.
<Evaluation criteria>
(Double-circle): The aerosol composition moved by the reversal operation | movement of 1 to 2 times.
(Circle): The aerosol composition moved by the reversal operation 3-5 times.
(Triangle | delta): The aerosol composition moved by the reversal operation 6-9 times.
X: The aerosol composition did not move even when the inversion operation was repeated 10 times.

2. The state of the propellant The aerosol product in which the aerosol composition was placed at the bottom in an upright room at 25 ° C. for one week and the aerosol composition was located at the bottom was shaken up and down three times with an amplitude of 30 cm, and then inverted. The object (paper towel) was sprayed for 1 second. The stability of injection was evaluated based on the following evaluation criteria.
<Evaluation criteria>
○: A uniform aerosol composition was jetted immediately after the start of jetting to form a foam that emits an appropriate bubble breaking sound.
X: The separated liquefied gas was injected immediately after the start of injection.

3. The remaining amount of aerosol composition The aerosol product is immersed in a constant temperature water bath at 25 ° C. for 1 hour, shaken up and down 3 times with an amplitude of 30 cm, then inverted and inverted and sprayed onto the object (paper towel) for 10 seconds. did. The same operation was repeated, and the remaining amount in the aerosol container when it became impossible to inject was calculated and evaluated based on the following evaluation criteria.
<Evaluation criteria>
A: The remaining amount was 5% or less.
○: The remaining amount was 6 to 9%.
Δ: The remaining amount was 10 to 15%.
X: The remaining amount exceeded 15%.

  As shown in Table 3, the aerosol composition of Examples 1 to 10 containing 60 to 90% by volume of the liquefied gas in the aerosol composition was inverted from the inverted state to the upright state, thereby making the inner bag made of polyolefin. It was possible to easily move inside the container body provided with and reach the valve. As a result, these aerosol compositions were able to form a foam that was sprayed uniformly to produce a bubble breaking sound, and did not remain in the container body.

  On the other hand, the aerosol composition of Comparative Example 1 in which the content of the liquefied gas is less than 60% by volume in the aerosol composition does not move in the container body, and the separated liquefied gas is injected, and most of the aerosol composition is in the container body. Remained. Further, in the aerosol composition of Comparative Example 2 in which the content of the liquefied gas exceeded 90% by volume in the aerosol composition, the aqueous stock solution and the liquefied gas were not emulsified.

  In addition, the aerosol compositions of Comparative Examples 3 to 5 that do not have an inner bag made of polyolefin and whose inner surface of the outer cylinder is not processed with polyolefin separated without moving in the container body. Liquefied gas was injected and much remained in the container body.

(Example 11)
An aqueous stock solution 2 was prepared according to the following formulation. The prepared aqueous undiluted solution 2 is filled in the inner bag of the container main body including the aluminum outer cylinder and the polyethylene inner bag shown in FIG. 1, and the inlet of the container main body is taken into the side of the housing. An inverted valve equipped with the above was fixed, and an aliphatic hydrocarbon having 4 carbon atoms (* 1) as a liquefied gas was charged so as to have a ratio (volume%) shown in Table 4. Thereafter, the container was shaken up and down to emulsify the aqueous stock solution 2 and the liquefied gas to prepare an aerosol composition.

<Aqueous stock solution 2>
Polyoxyethylene polyoxypropylene cetyl ether 1.0
Hydroxyethyl cellulose 0.5
Ethanol 2.0
l-Menthol 0.3
Methylparaben 0.1
Talc 0.5
Purified water 95.6
Total 100.0 (mass%)

(Examples 12 to 13 and Comparative Examples 6 to 7)
An aerosol composition was prepared in the same manner as in Example 11 except that the ratio of the aqueous stock solution 2 and the liquefied gas was changed to the ratio shown in Table 4.

(Example 14)
An aerosol product was produced in the same manner as in Example 11 except that 20% by volume of the aqueous stock solution 2, 70% by volume of aliphatic hydrocarbon (* 1) and 10% by volume of dimethyl ether were used as the liquefied gas.

(Example 15)
Except for using 20% by volume of aqueous stock solution 2, 70% by volume of aliphatic hydrocarbon (* 1) and 10% by volume of ditrans-1,3,3,3-tetrafluoroprop-1-ene as liquefied gas. An aerosol product was produced in the same manner as in Example 11.

(Comparative Example 8)
An aerosol product was produced in the same manner as in Example 11 except that the container body was not provided with an inner bag and the aluminum composition was filled in an aluminum outer cylinder (having a polyamide-imide coat on the inner surface).

(Comparative Example 9)
An aerosol product was produced in the same manner as in Example 11 except that the container body was not provided with an inner bag, and the aluminum composition was filled in an aluminum outer cylinder (equipped with an epoxyphenol coating on the inner surface).

(Comparative Example 10)
An aerosol product was produced in the same manner as in Example 11 except that the container body was not provided with an inner bag and the outer composition made of polyethylene terephthalate was filled with the aerosol composition.

  The container body filled with each of the aerosol compositions obtained in Examples 11 to 15 and Comparative Examples 6 to 10 is provided with an injection button (inverted spout, diameter of injection hole: 0.7 mm, linear internal passage). ) Were attached to produce aerosol products. About the obtained aerosol product, the following evaluation methods evaluated the mobility of the aerosol composition, the state of the projectile, and the remaining amount of the aerosol composition. The results are shown in Table 5. In addition, since the mobility of an aerosol composition and the residual amount of an aerosol composition are the same as an above-described evaluation method, description is abbreviate | omitted.

4). The state of the propellant The aerosol product in which the aerosol composition was placed at the bottom in an upright room at 25 ° C. for one week and the aerosol composition was located at the bottom was shaken up and down three times with an amplitude of 30 cm, and then inverted. The object (paper towel) was sprayed for 1 second. The stability of injection was evaluated based on the following evaluation criteria.
<Evaluation criteria>
○: A uniform aerosol composition was sprayed immediately after the start of spraying to form ice on a paper towel.
X: The separated liquefied gas was injected immediately after the start of injection.

  As shown in Table 4, the aerosol compositions of Examples 11 to 15 containing 60 to 90% by volume of the liquefied gas in the aerosol composition were inverted from the inverted state to the upright state, thereby making the inner bag made of polyolefin. It was possible to easily move inside the container body provided with and reach the valve. As a result, these aerosol compositions were sprayed uniformly to form icing on the object, and did not remain in the container body.

  On the other hand, the aerosol composition of Comparative Example 6 in which the content of the liquefied gas is less than 60% by volume in the aerosol composition does not move within the container body, and the separated liquefied gas is injected, and most of the aerosol composition is in the container body. Remained. Further, in the aerosol composition of Comparative Example 7 in which the blending amount of the liquefied gas exceeded 90% by volume in the aerosol composition, the aqueous stock solution and the liquefied gas were not emulsified.

  In addition, the aerosol composition of Comparative Examples 8 to 10 which does not have a polyolefin inner bag and whose inner surface of the outer cylinder is not processed with polyolefin separated without moving in the container body. Liquefied gas was injected and much remained in the container body.

DESCRIPTION OF SYMBOLS 1 Aerosol product 2 Aerosol composition 3 Aerosol container 4 Container main body 41 Outer cylinder 42 Inner bag 42S Inner peripheral surface 5 Valve 51 Valve mechanism 52 Housing 53 Stem 54 Stem rubber 55 Stem hole 56 Intake port 6 Injection button 61 Injection hole 62 Main body Part 63 Operation part 64 Hinge part

Claims (5)

An aerosol product in which an aerosol composition in which an aqueous stock solution containing a surfactant and water and a liquefied gas are emulsified is filled in an aerosol container,
60 to 90% by volume of the liquefied gas in the aerosol composition,
The aerosol container is an aerosol product in which an inner surface in contact with the aerosol composition is made of polyolefin. The aerosol container comprises a container body and an inner bag provided in the container body,
The aerosol product according to claim 1, wherein the inner bag is a single layer inner bag made of polyolefin or a laminated inner bag in which the innermost layer is a polyolefin layer.   The aerosol product according to claim 1, wherein the liquefied gas contains 20 to 100% by volume of an aliphatic hydrocarbon having 3 to 5 carbon atoms in the liquefied gas.   The aerosol product according to any one of claims 1 to 3, wherein the aerosol composition further contains a water-soluble polymer.   The aerosol product according to any one of claims 1 to 4, wherein the aerosol container is for inverted injection.

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