Replaceable aerosol product

Abstract

To provide a product that is easy to use and can prevent disposable plastic.SOLUTION: A replaceable aerosol product is prepared, which comprises: an outer container having a lid with a nozzle; and a main container detachably inserted into the outer container, into which contents are injected, the outer container being connected to an upper inlet of the main container, thereby allowing communication with the inside of the main container, and the main container containing a liquid composition and a non-flammable compressed gas.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an aerosol product having a liquid composition contained inside a replaceable container, more specifically, to an aerosol product having a replaceable main container that contains air bubbles having a diameter on the order of nanometers when applied to the skin, and that can promote the penetration of the liquid composition into the skin. [Background technology]

[0002] 2. Description of the Related Art Compositions containing bubbles having diameters on the order of nanometers are known as external compositions for use on human skin.

[0003] For example, Patent Document 1 discloses a nanobubble-containing cosmetic composition that contains a nanobubble liquid and a cosmetic component, and that has effects such as good compatibility with the skin and excellent non-sticky feel even after application of the cosmetic, where the nanobubble liquid contains oil and air bubbles, and the air bubbles have a diameter of 5 nm to 500 nm. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-103130 A Summary of the Invention [Problem to be solved by the invention]

[0005] There is a demand for a skin topical composition that has a simple structure, contains air bubbles when actually applied to the skin, and has a good feel when used. Furthermore, due to the recent increase in awareness of environmental issues, there is a demand for environmentally friendly plastic containers made of resin that are not disposable.

[0006] Therefore, an object of the present invention is to provide a product that can be used for a long period of time without disposing of plastic and that is comfortable to use. [Means for solving the problem]

[0007] That is, the present invention provides the aerosol products described below. [1] an outer container having a lid with a nozzle; and A main container is inserted detachably into the outer container and into which the contents are poured. Including, the outer container is connected to an upper inlet of the main container, and is thereby capable of communicating with the inside of the main container; The replaceable aerosol product is characterized in that the main container contains a liquid composition and a non-flammable compressed gas. [2] The aerosol product according to [1], characterized in that the outer container contains resin, the main container is a can container containing aluminum, and the main container is replaced and the outer container is used repeatedly. [3] The aerosol product according to [1] or [2], characterized in that the liquid composition contains water and / or a polyhydric alcohol, and the diameter h of the nozzle outlet and the nozzle length L satisfy L / h=1 to 20. [4] The aerosol product according to any one of [1] to [3], wherein the lid of the outer container has a protrusion or a claw portion for engaging with the main container on the inside thereof. [5] The aerosol product according to any one of [1] to [4], wherein the non-flammable compressed gas is sealed at a pressure of 0.3 to 1.0 MPa at 25°C. [6] The aerosol product according to any one of [1] to [5], wherein the liquid composition has a viscosity of 0 to 30,000 mPa·s at 25° C. [7] The aerosol product according to any one of [1] to [6], wherein the liquid composition is a solubilized composition, a gel, or an emulsion composition containing an oil and a surfactant. [8] The aerosol product according to any one of [1] to [7], wherein the non-flammable compressed gas is nitrogen. [9] The aerosol product according to any one of [1] to [8], wherein the liquid composition is a composition for external use on the skin. Effect of the Invention

[0008] According to the present invention, it is possible to provide an aerosol product that has a replaceable main container and is comfortable to use. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of an aerosol product according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a rear view of an aerosol product according to one embodiment of the present invention. [Diagram 3] 1 is a central cross-sectional view of an aerosol product according to one embodiment of the present invention. [Figure 4] FIG. 2 is a side view of the lid of an outer container of an aerosol product according to one embodiment of the present invention. [Diagram 5] FIG. 2 is a top view of the lid of an outer container of an aerosol product according to one embodiment of the present invention. [Figure 6] FIG. 2 is a side view of the lid of an outer container of an aerosol product according to one embodiment of the present invention. [Figure 7] FIG. 2 is a top view of the lid of an outer container of an aerosol product according to one embodiment of the present invention. [Figure 8] FIG. 2 is a perspective view showing an example of a mounting means for connecting an outer container and a main container according to one embodiment of the present invention. [Figure 9] FIG. 1 is a bottom view of an aerosol product according to one embodiment of the present invention. [Figure 10] FIG. 2 is a bottom view of an aerosol product according to another embodiment of the present invention. [Figure 11] 1 is a cross-sectional view of a portion of a lid of an outer container of an aerosol product according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the aerosol product of the present invention will be described in detail.

[0011] [Aerosol products] The present invention includes an outer container having a lid with a nozzle; and a main container that is detachably inserted into the outer container and into which contents are poured, the outer container is connected to an upper inlet of the main container, and is thereby capable of communicating with the inside of the main container; The present invention relates to a replaceable aerosol product, characterized in that the main container contains a liquid composition and a non-flammable compressed gas.

[0012] (container) As one embodiment, the aerosol product of the present invention comprises a main container 1, a liquid composition contained in the main container 1, and an outer container 8 that encases the main container 1, as shown in Figures 1, 2, and 3.

[0013] Here, the main container 1 has a mounting cup 3 that covers the upper opening, a stem 4 that has a discharge hole that is inserted approximately in the center of the mounting cup 3 and can discharge the liquid composition to the outside of the main container 1, and a stem hole 41 that communicates with the discharge hole and also communicates with the inside of the container 1, an elastic spring 5 that urges the stem 4 upward, and a tube 6 that is inserted into the lower part of the mounting cup 3 and directs the liquid composition to the stem 4.

[0014] Outer container 8 is provided outside main container 1 so as to enclose main container 1. Outer container 8 is detachably connected to the opening at the top of main container 1, and has a lid portion 7 and an application port 71 (nozzle portion).

[0015] The outer container 8 has an application port 71 that communicates with the discharge hole of the stem 4, and has a lid portion 7 provided on the upper part of the stem 4 and a side covering portion that covers part of the side surface of the main container 1. Although not limited thereto, the outer container 8 may have a structure that covers about 50 to 80% of the area of ​​the side surface of the main container 1. In other words, it is preferable that the outer container 8 has a structure in which about 20 to 50% of the area of ​​the side surface is open. The lid portion 7 and the side surface may be molded integrally, or may be molded as separate parts that can be separated and joined.

[0016] The connection between the opening at the top of the main container 1 and the lid of the outer container 8 is not particularly limited as long as it is in a separable manner and the communication part is in a state where the liquid composition inside the main container 1 can be discharged to the outside. In one embodiment, the outer container 8 is provided with a cylindrical part that covers the part of the stem 4 of the main container 1 that protrudes from the mounting cup 3, and the cylindrical part is fitted to the protruding part of the stem 4 of the main container 1. Furthermore, in order to increase the stability of the connection between the outer container 8 and the main container 1, it is also possible to provide multiple claw parts 83 on the inside of the lid of the outer container 8, and the tips of the claw parts can also engage the peripheral part of the mounting cup 3 of the main container 1. Alternatively, it is also possible to provide multiple protrusions 84 along the inner circumference on the inside of the lid of the outer container 8, as shown in the perspective view of the inside of the lid in FIG. 8. The protrusions can engage the peripheral part of the mounting cup 3 of the main container 1. Although not limited thereto, such a convex portion is, for example, a protruding portion having a height of about 0.25 to 0.6 mm, and preferably a protruding portion having a height of about 0.3 to 0.5 mm, for accommodating an aerosol can with a volume of about 10 to 600 ml. Such a claw or convex portion structure provides stability to the connection between main container 1 and outer container 8, particularly to withstand the pressure of the aerosol product when it is used.

[0017] The liquid composition and non-flammable compressed gas G contained in the main container 1 are under a higher pressure than the outside of the main container 1. Therefore, when the lid 7 of the outer container is pressed down, the stem 4 is also pressed down against the biasing force of the elastic spring 5, so that the stem hole 41 communicates with the inside of the container 1, and the liquid composition pressed by the non-flammable compressed gas G is discharged to the outside from the application port 71 of the lid 7 through the tube 6 and the stem 4.

[0018] In the aerosol product of the present invention, the main container 1 is a member that contains the liquid composition 2, the non-flammable compressed gas G, etc., and the inside of the main container 1 is filled with the non-flammable compressed gas G. Therefore, the main container is preferably pressure-resistant so as not to break under the internal pressure used in normal aerosol products. The main container is not limited, but is preferably made of metal, more preferably a can container containing aluminum, and particularly preferably a can container made of an aluminum alloy.

[0019] In the present invention, for example, the main container can be emptied after the liquid composition inside has been used up, and replaced with a new main container filled with the contents, allowing the outer container to be used repeatedly.

[0020] The outer container 8 is a container containing a resin. The type of resin is not particularly limited, but may be polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol, acrylonitrile-styrene, polyamide, or the like. Two or more of these may be used in combination. For example, when a claw or a protrusion is provided on the inside of the lid of the outer container 8, it is preferable that the resin has moderate hardness and strength as well as flexibility so as to prevent damage to the claw or protrusion of the outer container 8 due to frequent replacement of the main container 1. Examples of resins that may have such properties during molding include polyethylene and / or polypropylene.

[0021] The shape of the nozzle portion 71 is not particularly limited, and in one embodiment, as shown in Figures 4 and 5, the nozzle portion 71 may be integral with a member that covers the upper part of the joint portion 72 that contacts the nozzle 71. Alternatively, in another embodiment, the nozzle 71 may be structured to be coupled to the joint portion 72, as shown in Figures 6 and 7.

[0022] In one embodiment, the cylinder 73 is fixed to a container covering portion 74 that contacts the container and directly covers the upper portion of the container, and the joint portion 72 is movably attached to the outer periphery of the cylinder 73.

[0023] The nozzle portion may be in the shape of a cylinder, an elliptical cylinder, an elongated cylinder, a polygonal cylinder, or the like.

[0024] In one embodiment, the length of the nozzle portion (for example, the length indicated by L in FIG. 11) is preferably about 5 to 70 mm, more preferably about 10 to 65 mm, and even more preferably about 15 to 60 mm.

[0025] The shape of the outlet of the nozzle may be any shape, including a circle, an ellipse, a triangle, a square, or any other polygon. The area of ​​the opening of the outlet is 1.5 to 20 mm. 2 The preferred thickness is 3 to 15 mm. 2 A degree is even more preferable.

[0026] In one embodiment, the inner diameter (maximum inner diameter; length indicated by h) of the opening of the nozzle discharge part is preferably about 1 to 10 mm, more preferably about 1 to 8 mm, and even more preferably about 1.2 to 5 mm.

[0027] The ratio L / h of the length L of the nozzle portion to the inner diameter h of the opening is preferably 1-20, more preferably 1-19, and further preferably 1-18.

[0028] When the nozzle portion has the above-mentioned shape and size, air bubbles having a diameter of 1 nm or more and less than 1000 nm are generated and last longer, promoting the penetration of the liquid composition into the skin.

[0029] The main container 1 of the aerosol product of the present invention thus produced preferably has a total volume of 5 to 1000 ml, more preferably 10 to 600 ml, and further preferably has a weight of 10 to 800 g, more preferably 50 to 500 g. If the aerosol product of the present invention is within these ranges, it is possible for the user to carry or move it. Furthermore, in the aerosol product of the present invention, even if the liquid composition 2 does not contain many nanometer-order air bubbles at the time of manufacturing the aerosol product, it is possible to make the liquid composition 2 contain a large amount of nanometer-order air bubbles when used on the skin by, for example, drawing in air near the application port 71.

[0030] The aerosol product of the present invention thus produced may have a hollow structure at the bottom of the outer container 8 so as to facilitate replacement of the main container 1 (FIG. 9). Alternatively, it may have an openable and closable lid for the bottom (FIG. 10), and the bottom lid may be closed during use, and the main container 1 may be replaced by opening the bottom lid when it is time to replace it.

[0031] (Liquid composition) The liquid composition contained in the aerosol product of the present invention is a liquid composition contained in a container, and is not specifically limited as long as it is liquid at room temperature of 20 to 30° C. Preferably, it may contain water.

[0032] The water contained in the liquid composition is preferably water that meets the Japanese Pharmacopoeia standard, and is preferably, for example, ordinary water such as tap water or well water, purified water obtained by treating ordinary water by any one of distillation, ion exchange treatment using an ion exchange membrane, and ultrafiltration treatment using an ultrafiltration membrane, or a combination thereof, and sterilized purified water obtained by sterilizing purified water by heating, etc. The content of water in the liquid composition is preferably 30 to 98% by mass, more preferably 40 to 95% by mass, even more preferably 50 to 90% by mass, and particularly preferably 60 to 85% by mass.

[0033] The liquid composition may contain a physiologically active ingredient, including, but not limited to, the following ingredients: Polysaccharides such as heparinoids, hyaluronic acid, sodium hyaluronate, and chondroitin sulfate; Polyhydric alcohols such as glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, 1,2-pentanediol, butylene glycol, sorbitol, and polyethylene glycol; Vitamins such as vitamin E group and its derivatives, vitamin A group and its derivatives, vitamin C and its derivatives, and vitamin B group; Hair growth products such as minoxidil; Moisturizing ingredients other than polysaccharides such as trehalose and urea; Cooling agents such as menthol and camphor; Anti-inflammatory agents such as allantoin, glycyrrhizic acid or its salts, indomethacin, diclofenac sodium, and loxoprofen sodium; Antiseptics such as chlorhexidine gluconate and isopropyl methylphenol; Various amino acids; or Antioxidants such as procaine, tetracaine, bupivacaine, mepipacaine, chloroprocaine, proparacaine, meprylcaine or salts thereof. These components may be used alone or in combination of two or more.

[0034] The content of the physiologically active ingredient in the liquid composition is not particularly limited. For example, the content of the polysaccharide in the liquid composition is preferably 0.000001 to 5 mass%, more preferably 0.00001 to 4 mass%, and most preferably 0.0001 to 3 mass%.

[0035] When the liquid composition contains polysaccharides and other moisturizing components, it can enhance the moisturizing effect and provide firmness and elasticity to the skin. In addition, when the content ratio of the moisturizing components of the polysaccharides is within this range, when the liquid composition is applied to the human body as an application containing a large number of bubbles with a diameter of 1 nm or more and less than 1000 nm, it can penetrate the skin to enhance the moisturizing effect and make it easier to maintain the moisturizing effect.

[0036] In addition, for example, the content of glycyrrhizic acid or a salt thereof is preferably 0.001 to 5.0% by mass, more preferably 0.05 to 3.0% by mass. In the liquid composition, the content of allantoin or a salt thereof is preferably 0.001 to 5.0% by mass, more preferably 0.05 to 3.0% by mass. If the content of these medicinal ingredients is within this range, when applied to the skin of a human or the like, it can penetrate the skin and provide various medicinal effects.

[0037] For example, the content of polyhydric alcohol in the liquid composition is preferably 0.01 to 20 mass%, more preferably 0.1 to 18 mass%, and even more preferably 1 to 15 mass%. For example, the content of ceramides and / or plant extract in the liquid composition is preferably 0.001 to 5.0 mass%, and more preferably 0.01 to 3.0 mass%.

[0038] The liquid composition of the present invention may further contain oils, surfactants, thickeners, and the like.

[0039] The oils that can be contained in the liquid composition are preferably hydrocarbons such as squalane, vegetable oils such as olive oil, silicone oils such as dimethylpolysiloxane, and fatty acid alcohols having 14 to 22 carbon atoms such as stearyl alcohol and behenyl alcohol. These oils can be used alone or in combination of two or more. These oils can be used to prepare an emulsion that is, for example, an oil-in-water emulsifier, and can suppress the evaporation of water from the skin to which the product is applied, thereby enhancing the moisturizing effect and providing firmness and elasticity to the skin.

[0040] The oil content in the liquid composition is particularly preferably used in products such as emulsion preparations (lotions, etc.) or oil cleansing. The content of the oil content in the liquid composition is preferably 0.05 to 10% by mass, more preferably 0.5 to 7% by mass, for example, in the case of products such as lotions. When the content of the oil content is within this range, the evaporation of water from the skin to which the product is applied can be suppressed, the moisturizing effect can be enhanced, and the skin can be given firmness and elasticity. The content of the oil content in the liquid composition is preferably 0.05 to 80% by mass, more preferably 0.5 to 70% by mass, for products such as oil cleansing.

[0041] The surfactant that can be contained in the liquid composition is preferably a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, etc. As the nonionic surfactant, polyoxyethylene alkyl ethers such as polyoxyethylene cetyl ether and polyoxyethylene stearyl ether, polyoxyethylene fatty acid esters such as polyoxyethylene glycol monostearate, glycerin fatty acid esters such as glyceryl monostearate, sorbitan fatty acid esters, polyhydric alcohol fatty acid esters such as sucrose fatty acid esters, fatty acid esters of polyoxyethylene-added polyhydric alcohols, fatty acid diethanolamides, etc. are preferred, and specifically, polyoxyethylene sorbitan tetraoleate, polyoxyethylene (20) sorbitan oleate, lauric acid diethanolamide, coconut oil fatty acid (8 to 18 carbon atoms) diethanolamide, etc. are preferred.As the anionic surfactant, preferred are carboxylic acid type anionic surfactants such as sodium laurate, sodium stearate, sodium laureth-6 carboxylate (sodium polyoxyethylene (4.5) lauryl ether acetate), sodium lauroyl sarcosine, sodium octanoate, sodium decanoate, sodium myristate, sodium palmitate, and sodium coconut oil fatty acid (carbon number 8 to 18) sarconine. As sulfonic acid type anionic surfactants, preferred are sodium lauryl sulfoacetate, sodium 1-hexanesulfonate, sodium 1-octane sulfonate, sodium 1-decanesulfonate, sodium 1-dodecanesulfonate, sodium toluenesulfonate, sodium cumenesulfonate, sodium naphthalenesulfonate, and sodium naphthalenedisulfonate. Preferred are disodium oleate, trisodium naphthalene trisulfonate, sodium alpha olefin sulfonate, etc.; preferred are sulfate ester type anionic surfactants: sodium lauryl sulfate, myristyl sulfate, sodium laureth sulfate (polyoxyethylene (3) lauryl ether sulfate sodium), sodium cetyl sulfate, sodium cocoglyceryl sulfate (hydrogenated coconut oil fatty acid glyceryl sulfate sodium), triethanolamine lauryl sulfate, ammonium lauryl sulfate, triethanolamine laureth sulfate, etc.; preferred are phosphate ester type anionic surfactants: sodium lauryl phosphate, sodium polyoxyethylene cetyl ether phosphate (polyoxyethylene (5) cetyl ether phosphate sodium), lauryl phosphoric acid, potassium lauryl phosphate, etc.; preferred are cationic surfactants: quaternary ammonium salt type: tetramethylammonium chloride, tetrabutylammonium chloride, dodecyldimethylbenzylammonium chloride, alkyltrimethylammonium chloride, octyltrimethylammonium chloride, dodecyltrimethylammonium chloride, benzalkonium chloride, benzethonium chloride, etc.; preferred are alkylamine salt type: monomethylamine hydrochloride, dimethylamine hydrochloride, etc.As the amphoteric surfactant, preferred are amine oxide types such as lauryl dimethylamine oxide, alkyl (carbon number 8 to 18) dimethylamine oxide (N,N-dimethyl alkyl (C8 to 18) amine oxide), coconut alkyl dimethylamine oxide, decyl dimethylamine oxide, myristyl dimethylamine oxide, dihydroxyethyl lauryl amine oxide, and oleyl dimethylamine oxide, and betaine types such as lauryl dimethylamino acetate betaine, lauryl hydroxysulfobetaine, stearyl dimethylamino acetate betaine, dodecyl aminomethyl dimethylsulfopropyl betaine, coconut oil fatty acid (C8 to 18) amidopropyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, and lauric acid amidopropyl betaine. These surfactants can be used alone or in combination of two or more.

[0042] The surfactant in the liquid composition can be particularly preferably used in products such as emulsion preparations (such as emulsions) or face wash detergents. The content of the surfactant in the liquid composition is preferably 0.05 to 15.0% by mass, more preferably 0.1 to 10.0% by mass, and even more preferably 0.3 to 5% by mass, in the case of emulsion preparations. The content of the surfactant in the liquid composition is preferably 0.05 to 40.0% by mass, more preferably 0.1 to 35% by mass, and even more preferably 0.3 to 30% by mass, in the case of face wash detergents. If the content of the surfactant is within this range, the oil can be uniformly dispersed when the oil-in-water emulsifier is prepared by mixing the oil as described above, and even if stored for a long time, the water and oil do not separate and a uniform mixed state can be maintained.

[0043] Preferred thickeners that may be contained in the liquid composition include polysaccharides such as xanthan gum, guar gum, methyl cellulose, and ethyl cellulose, carboxyvinyl polymers, and acrylic acid / alkyl methacrylate copolymers. These thickeners may be used alone or in combination of two or more. These thickeners allow the composition to be easily spread on the human body without running off the skin.

[0044] The content of the thickener in the liquid composition is preferably 0.05 to 7% by mass, more preferably 0.1 to 5% by mass, of the liquid composition. When the content of the thickener is within this range, the liquid composition can be easily spread without running off the skin.

[0045] By including such a thickener, the viscosity of the liquid composition can be adjusted to about 0 to 30,000 mPa·s at 25° C., preferably 0.5 to 20,000 mPa·s, and in some cases more preferably 3 to 10,000 mPa·s. When the viscosity of the liquid composition is within this range, it becomes possible for the air bubbles to remain in the application for a long time when the application contains air bubbles and is applied to the skin of a human or the like.

[0046] (pH) From the viewpoint of the stability or safety of the components, the liquid composition of the present invention preferably has a liquidity of pH 2 to 10. More preferably, the pH is 3 to 9, and even more preferably, the pH is 4 to 8. The pH of the liquid composition can be measured at 20° C. using a commercially available pH meter (for example, F-52 (registered trademark) model manufactured by Horiba, Ltd.).

[0047] (viscosity) From the viewpoint of component stability, etc., the liquid composition of the present invention preferably has a viscosity of about 0 to 30,000 mPa·s, more preferably about 0.5 to 20,000 mPa·s, and even more preferably about 3 to 10,000 mPa·s at 25° C. The viscosity of the liquid composition is measured at 25° C. using an apparatus named: Toki Sangyo Co., Ltd.'s TVB-10 type viscometer (with thermostatic bath) at 25° C., SPINDLE. If the viscosity is less than 50 mPa·s, it is measured with rotor M1, at 100 rpm, and for a measurement time of 60 seconds; if the viscosity is 50 mPa·s or more but less than 1000 mPa·s, it is measured with rotor M2, at 30 rpm, and for a measurement time of 60 seconds; if the viscosity is 1000 mPa·s or more but less than 5000 mPa·s, it is measured with rotor M3, at 12 rpm, and for a measurement time of 60 seconds; if the viscosity is more than 5000 mPa·s, it is measured with rotor M4, at 12 rpm, and for a measurement time of 60 seconds.

[0048] The liquid composition of the present invention may be any of a solubilized composition, a gel, or an emulsion composition. The solubilized composition has a transmittance of light at a wavelength of 660 nm of, for example, 50% or more, preferably 70% or more. In the case of an emulsion composition, it is preferable that the composition is an oil-in-water emulsion composition, but it may also be a water-in-oil emulsion composition. The ratio of the oil phase to the water phase in this case is not limited, but is preferably about 1:0.5 to 99, more preferably about 1:5 to 80, and even more preferably about 1:10 to 50.

[0049] When the liquid composition in which various compounds are mixed in this manner is applied from the tip of the nozzle part 71 of the lid part 7 indirectly provided on the container 1 through the mounting cup 3 provided on the opening of the container 1 and the stem 4 provided on the mounting cup 3, the applied application preferably contains 10 million to 100 trillion bubbles / ml with a diameter of 1 nm or more and less than 1000 nm, more preferably 100 million to 50 trillion bubbles / ml. The lid part 7 may be equipped with a nozzle and may have a structure that covers a part of the mounting cup. The lid part 7 may be a pump-type lid having a shape as shown in the side views shown in Figures 4 and 6. Figures 5 and 7 are top views corresponding to the side views of Figures 4 and 6, respectively.

[0050] In one embodiment of the present invention, the formulation discharged from the aerosol product contains bubbles having a diameter of 1 nm or more and less than 1000 nm when discharged and / or applied to the skin, and the amount of bubbles is preferably about 10 million to 100 trillion / ml, more preferably about 100 million to 50 trillion / ml. The amount of bubbles is, for example, a value measured using NanoSightNS300 manufactured by Malvern Panalytical Ltd, which can calculate the hydrodynamic diameter using the Stokes-Einstein equation based on the scattered light when irradiated with laser light. The solution was diluted to a measurable concentration and measured.

[0051] (Non-flammable compressed gas) The non-flammable compressed gas G of the present invention is filled inside the main container 1 together with the liquid composition, and is a gas in a state of pressure higher than atmospheric pressure inside the container 1. By filling the non-flammable compressed gas G, a large amount of air bubbles can be contained during discharge and / or skin application. Furthermore, since the non-flammable compressed gas G may be discharged to the outside together with the liquid composition by pressing the lid portion 7, the non-flammable compressed gas G is excellent in safety because it does not ignite or burn due to fire even when applied together with the liquid composition. For example, the non-flammable compressed gas is preferably nitrogen, carbon dioxide, nitrous oxide, helium, argon, or compressed air. When compressed nitrogen is used as the non-flammable gas G, it is preferable that the nitrogen content is 99.9% or more, and more preferably that the nitrogen content is 99.99% or more.

[0052] The pressure of the nonflammable compressed gas G filled in the container 1 together with the liquid composition is preferably 0.1 to 1.0 MPa, and more preferably 0.3 to 0.9 MPa, at 25° C. When the pressure of the nonflammable compressed gas G is within this range, the liquid composition is smoothly discharged together with the nonflammable compressed gas G, and a large amount of bubbles having a diameter of about 1 nm or more and less than 1000 nm can be contained during ejection and / or skin application.

[0053] (Application) The aerosol product of the present invention is preferably used as a skin external preparation product containing a liquid composition. Such skin external preparation products include, but are not limited to, various medicines, various quasi-drugs, cooling agent-related products, lotions, milky lotions, cleansing agents, face washes, body soaps, beauty essences, body creams, hand creams, hair growth agents, hair tonics, hair sprays, and other hair-related products. Skin external preparation products include dermatitis treatment or prevention preparations, antipruritic agents, antiallergic drugs, preparations for improving rough hands, antibacterial agents, antiviral agents, and the like. EXAMPLES

[0054] The liquid composition of the present invention will be specifically described below, but the present invention is not limited to the following examples.

[0055] Liquid compositions having the formulations shown in Table 1 were prepared for the production of aerosol products. In preparing the compositions in the aerosol products of Examples 1 and 5, the components were mixed in a 200 ml Griffin beaker at room temperature of 25° C., and then a viscosity modifier was added and mixed.

[0056] In preparing the compositions of Examples 2 and 4, the aqueous phase was mixed in a 200 ml Griffin beaker at room temperature of 25°C, and the oil phase was mixed in another Griffin beaker. The aqueous phase and the oil phase were then heated to about 80°C, mixed, and cooled to about 40°C while stirring.

[0057] In preparing Examples 3 and 6, the components were mixed in a 200 ml Griffin beaker at room temperature of 25°C.

[0058] The viscosity of each liquid composition was measured at 25° C. using a Brookfield rotational viscometer Type B (manufactured by Toki Sangyo Co., Ltd., product name “TVB-10M”, rotor No. 3) according to JIS K7117-1.

[0059] The components and viscosity properties of each composition are shown in Table 1.

[0060] [Table 1] (mass%)

[0061] [Example] The liquid composition having the thus obtained formulation was placed in a container, a mounting cup 3 and a stem 4 were attached, and nitrogen was charged from the stem 4 until the pressure inside the container 1 reached 0.8 MPa at 25°C, producing an aerosol can. The aerosol can was then attached to an outer container having protrusions 84 (0.5 mm high, provided at three equally spaced locations on the inside of the lid) as shown in Fig. 8. When attaching, the stem hole at the top of the aerosol can and the application port 71 of the outer container were made to communicate with each other, and the mounting cup 3 was pressed into and fitted into the top of the protrusion 84 of the outer container 8 (on the nozzle side of the lid) to attach the can to an aerosol product.

[0062] Comparative Example The same liquid composition as in Example 1 was stored in a specified container, and a finger spray that discharges the contents by the force of the user's finger was connected to the container to prepare a finger spray product. That is, in Comparative Example 1, the non-flammable compressed gas was not filled, and only air at normal pressure was present inside the connected container, and the container was not connected to an outer container. In the product of the Comparative Example, the liquid composition stored inside is discharged from the discharge port by pressing the finger spray during use.

[0063] (Test Example 1: Viscosity Measurement) The viscosity of the liquid composition ejected using the aerosol product of each Example and the liquid composition ejected using the finger spray product of Comparative Example 1 was measured at 25°C, SPINDLE No. M3, and 12 rpm using a Brookfield rotational viscometer Type B (manufactured by Toki Sangyo Co., Ltd., product name "TVB-10M") according to JIS K7117-1.

[0064] (Test Example 2: pH measurement) The liquid composition discharged from the aerosol product of each Example and the liquid composition discharged from the finger spray product of Comparative Example 1 were measured at a liquid temperature of 20°C using a commercially available pH meter (e.g., F-52 (registered trademark) model, manufactured by Horiba, Ltd.).

[0065] (Test Example 3: Measurement of air bubble volume) The liquid composition was ejected using the products of each of the Examples and Comparative Examples, and the amount of bubbles having a diameter of 1 to 1000 nm was measured for the ejected product. For the aerosol products of each Example and Comparative Example, the amount of bubbles having a diameter of 1 to 1000 nm, also called ultrafine bubbles, contained in the applied object when the liquid composition 2 is applied from the application port 71 was measured using a NanoSightNS300 manufactured by Malvern Panalytical Ltd. Note that for the aerosol products of each Example and Comparative Example, the amount of bubbles was measured after diluting the applied object when the liquid composition 2 is applied from the application port 71 to a predetermined weight with degassed water, and the amount of bubbles was multiplied by the dilution ratio to convert it into the amount of foam in the applied object.

[0066] (Test Example 4: Usability Evaluation Test) Using the aerosol products of each Example and Comparative Example, the liquid composition was discharged, and tests were performed on the ease of discharge from the pump and skin compatibility when spread on human skin.

[0067] [Ease of dispensing] Using the aerosol products of each Example and Comparative Example, approximately 1 g of the liquid composition was discharged onto the palm. In the aerosol products of the Examples, the liquid composition was discharged by squirting from a nozzle facing away from the label part 11 of the aerosol can as shown in Figs. 1 and 2, while in the products of Comparative Examples, the liquid composition was discharged by pressing the pump with strong force applied by the fingertips. When the discharged liquid did not spill from the palm or adhere to the outer container during discharge, and the liquid was comfortable to use, it was judged as ◯, and when the discharged liquid spilled from the palm or adhered to the outer container, it was judged as ×.

[0068] [Easy to spread] At 25°C, about 1 g of the liquid composition 2 was applied to the inside of the arm of a subject for the aerosol product or spray product of each Example and Comparative Example, and the applied product was spread and applied. The ease of spreading when applied was evaluated on a 5-point scale, with 5 points for "very easy to spread", 4 points for "easy to spread", 3 points for "average easy to spread", 2 points for "slightly difficult to spread", and 1 point for "difficult to spread", and the average score of the 5 panelists was calculated. The average score of 4 points or more was evaluated as ◎, 3.5 points or more but less than 4 points was evaluated as ○, 3.0 points or more but less than 3.5 points was evaluated as △, and less than 3.0 points was evaluated as ×. Of these, ◎ and ○ were evaluated as good for ease of spreading, and △ and × were evaluated as poor for difficulty of spreading.

[0069] [Easy to blend into skin] At 25°C, about 1 g of the liquid composition 2 was applied to the inside of the arm of a subject for the aerosol product or spray product of each Example and Comparative Example, and the applied product was spread and applied. The compatibility with the skin when applied was evaluated on a 5-point scale, with "very good compatibility with the skin" being 5 points, "good compatibility with the skin" being 4 points, "normal compatibility with the skin" being 3 points, "slightly poor compatibility with the skin" being 2 points, and "poor compatibility with the skin" being 1 point, and the average score of the 5 panelists was calculated. The average score of 4 points or more was evaluated as ◎, 3.5 points or more but less than 4 points was evaluated as ○, 3.0 points or more but less than 3.5 points was evaluated as △, and less than 3.0 points was evaluated as ×. Of these, ◎ and ○ were judged to be good as being compatible with the skin, and △ and × were judged to be poor as being poor as being poor.

[0070] [Moisturizing] At 25°C, about 1g of the liquid composition 2 was applied to the inside of the arm of a subject for the aerosol product or spray product of each Example and Comparative Example, and the applied product was spread and applied.The moisturizing feeling when applied was evaluated on a 5-point scale, with "moisture retention is very good" being 5 points, "moisture retention is good" being 4 points, "moisture retention is normal" being 3 points, "moisture retention is poor" being 2 points, and "moisture retention is not maintained" being 1 point, and the average score of the 5 panelists was calculated.The average score of 4 points or more was evaluated as ◎, 3.5 points or more but less than 4 points was evaluated as ○, 3.0 points or more but less than 3.5 points was evaluated as △, and less than 3.0 points was evaluated as ×.Of these, ◎ and ○ were evaluated as good as moisture retention was maintained, and △ and × were evaluated as bad as moisture retention was not maintained.

[0071] [Non-sticky] At 25°C, about 1 g of the liquid composition 2 was applied to the inside of the arm of a subject for the aerosol products and spray products of each Example and Comparative Example, and the applied product was spread and applied. The compatibility with the skin when applied was evaluated on a 5-point scale, with "not sticky at all" being 5 points, "not sticky" being 4 points, "almost no sticky" being 3 points, "slightly sticky" being 2 points, and "very sticky" being 1 point, and the average score of the 5 panelists was calculated. The average score of 4 points or more was evaluated as ◎, 3.5 points or more but less than 4 points was evaluated as ○, 3.0 points or more but less than 3.5 points was evaluated as △, and less than 3.0 points was evaluated as ×. Of these, ◎ and ○ were judged to be good as not sticky, and △ and × were judged to be bad as sticky.

[0072] In the evaluation of the ease of spreading, compatibility with the skin, moisturizing properties, and non-stickiness described above, products rated as ⊚ or ◯ in all categories were judged to be excellent in overall balance and therefore preferable.

[0073] The test results of the products of these examples and comparative examples are shown in Table 2.

[0074] [Table 2]

[0075] As shown in Table 2, the aerosol product of the embodiment in which an aerosol can containing liquid composition 2 and compressed nitrogen as non-flammable compressed gas G is attached to an outer container equipped with a lid having a pump structure can be applied to the body of a human or the like to entrain air near the application port, thereby containing a large number of air bubbles with diameters on the order of nanometers, and furthermore, various performances were good and useful when the application was ejected and applied to the skin. [Explanation of symbols]

[0076] 1. Main container 12 Bottom of main container 2. Liquid composition 3. Mounting cup 4. Stem 41 Stem hole 5. Elastic spring 6...Tube 7...Lid part 71... Application port G: Non-flammable compressed gas 72...junction 73...Cylindrical section 8... Outer container 81... Bottom circumference of outer container 82...Bottom lid of outer container 83 Claw part 84... Convex part

Claims

1. an outer container having a lid with a nozzle; and A main container is detachably inserted into the outer container and into which the contents are poured. Including, the outer container is connected to an upper inlet of the main container, and is thereby capable of communicating with the inside of the main container; The replaceable aerosol product is characterized in that the main container contains a liquid composition and a non-flammable compressed gas.

2. 2. The aerosol product according to claim 1, wherein the outer container is a canister containing resin and the main container is a canister containing aluminum, and the main container is replaced and the outer container is reused.

3. The aerosol product according to claim 1, characterized in that the liquid composition contains water and / or a polyhydric alcohol, and the diameter h of the nozzle outlet and the nozzle length L satisfy L / h = 1 to 20.

4. The aerosol product according to claim 1 , wherein the lid of the outer container has a protrusion or a claw portion for engaging with the main container on the inside thereof.

5. The aerosol product according to claim 1, characterized in that the non-flammable compressed gas is sealed at a pressure of 0.3 to 1.0 MPa at 25°C.

6. 2. The aerosol product according to claim 1, wherein the viscosity of the liquid composition is 0 to 30,000 mPa·s at 25° C.

7. 2. The aerosol product according to claim 1, wherein the liquid composition is a solubilized composition, a gel, or an emulsion composition containing an oil and a surfactant.

8. 2. The aerosol product according to claim 1, wherein the non-flammable compressed gas is nitrogen.

9. 2. The aerosol product according to claim 1, wherein the liquid composition is a composition for external application to the skin.

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