Discharge products

Abstract

An aerosol product which is provided with: an aerosol composition; and an aerosol container that is to be filled with the aerosol composition, while having a valve. The aerosol composition contains a starting material liquid containing water, and dimethyl ether; the content of the dimethyl ether in the aerosol composition is from 20% by mass to 30% by mass; the valve comprises a housing that is provided with a vapor-phase feed port, through which the vapor phase part of the aerosol composition is introduced; and the jetting amount of combustible materials contained in the aerosol composition is from 0.05 g / second to 0.24 g / second.

Description

[Technical Field]

[0001] This invention relates to an aerosol product. More specifically, this invention relates to an aerosol product that provides a fine mist and stable spray state even with a low liquefied gas content, has appropriate drying properties, and is highly safe from fire. [Background technology]

[0002] Conventionally, aerosol products have been developed that spray the undiluted solution in a mist using dimethyl ether. Patent Document 1 discloses a hairspray containing at least one polycondensate including polyurethane and / or polyurea chains, water, ethanol, and dimethyl ether, with a spray volume of 0.75 g per second or less. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Special Publication No. 2002-523439 [Overview of the Initiative]

[0004] However, the invention described in Patent Document 1 has a relatively low content of dimethyl ether, which is a liquefied gas, and does not have a gas phase introduction hole. As a result, when sprayed on the hair, the spray spread is small and the amount sprayed per unit time is large. Therefore, the invention described in Patent Document 1 has a high density of adhesion to the hair and poor drying properties. In addition, since the aerosol composition contains approximately 50% by weight of ethanol and dimethyl ether, which are flammable substances, the invention described in Patent Document 1 has a large amount of flammable substance sprayed. Therefore, if the invention described in Patent Document 1 is sprayed for a long time in a small room, there is a risk of ignition by a nearby ignition source. Furthermore, in the invention described in Patent Document 1, if the content of dimethyl ether is reduced, it is difficult to obtain a stable, fine spray.

[0005] This invention has been made in view of the above-mentioned conventional problems, and aims to provide an aerosol product that can produce a stable spray state in a fine mist even with a small amount of liquefied gas, has appropriate drying properties, and is highly safe from fire.

[0006] An aerosol product according to one aspect of the present invention, which solves the above problems, comprises an aerosol composition and an aerosol container having a valve and filled with the aerosol composition, wherein the aerosol composition comprises a stock solution containing water and dimethyl ether, the dimethyl ether content is 20 to 30% by mass of the aerosol composition, the valve comprises a housing provided with a gas phase introduction hole for introducing the gas phase portion of the aerosol composition, and the amount of flammable material contained in the aerosol composition sprayed is 0.05 to 0.24 g / second. [Modes for carrying out the invention]

[0007] [Aerosol Products] An aerosol product according to one embodiment of the present invention comprises an aerosol composition and an aerosol container having a valve and filled with the aerosol composition. The aerosol composition contains a stock solution containing water and dimethyl ether. The dimethyl ether content is 20 to 30% by mass of the aerosol composition. The valve has a housing provided with a gas phase introduction hole for introducing the gas phase portion of the aerosol composition. The amount of flammable material contained in the aerosol composition sprayed is 0.05 to 0.24 g / second. Each of these will be described below.

[0008] (Aerosol composition) The aerosol composition contains a water-based concentrate and dimethyl ether.

[0009] • Undiluted The undiluted solution contains water. Water is used as a solvent.

[0010] The type of water is not particularly limited. For example, the water could be purified water, deionized water, or deep-sea water.

[0011] The water content is not particularly limited. For example, the water content is preferably 60% by mass or more, and more preferably 70% by mass or more, in the undiluted solution. Furthermore, the water content is preferably 99% by mass or less, and more preferably 95% by mass or less. When the water content is within the above range, the aerosol composition has a less noticeable flame length from the sprayed material, resulting in superior fire safety. In addition, aerosol products are easy to incorporate active ingredients. Moreover, when sprayed in a confined space, aerosol products are less likely to ignite even if there is a nearby ignition source.

[0012] The undiluted solution may contain surfactants, alcohol, hair styling agents, active ingredients, water-soluble polymers, oils, powders, etc., depending on the application and purpose.

[0013] Surfactants, when containing hydrofluoroolefins, are used in aerosol compositions for purposes such as emulsifying them to ensure a uniform composition and stable spray state.

[0014] The surfactant is not particularly limited. Examples include nonionic surfactants, anionic surfactants, amphoteric surfactants, silicone-based surfactants, and natural surfactants.

[0015] Nonionic surfactants include ether types such as polyoxyethylene polyoxypropylene alkyl ethers like POE·POP cetyl ether and POE·POP decyltetradecyl ether; polyoxyethylene alkyl ethers such as POE cetyl ether, POE stearyl ether, POE oleyl ether, POE lauryl ether, POE behenyl ether, POE octyldodecyl ether, POE isocetyl ether, POE isostearyl ether; polyethylene glycol fatty acid esters such as polyethylene glycol monostearate; polyoxyethylene hydrogenated castor oil; polyoxyethylene glycerin fatty acid esters such as POE glyceryl monostearate and POE glyceryl monooleate; polyoxyethylene alkyl ether fatty acid esters such as POE cetyl stearate and POE lauryl isostearate; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan triisostearate; polyoxyethylene sorbit fatty acid esters such as polyoxyethylene sorbit monolaurate, polyoxyethylene sorbit tetrastearate, polyoxyethylene sorbit tetraoleate; polyglycerin fatty acid esters such as hexaglyceryl monolaurate, hexaglyceryl monomyristate, pentaglyceryl monolaurate, pentaglyceryl monomyristate, pentaglyceryl monooleate, pentaglyceryl monostearate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, decaglyceryl monooleate, decaglyceryl monolinoleate; ester types such as polyoxyethylene lanolin alcohol like POE lanolin alcohol, etc.

[0016] Anionic surfactants include fatty acid soaps, alkyl phosphates such as potassium lauryl phosphate and sodium lauryl phosphate; polyoxyethylene alkyl ether phosphates such as sodium POE lauryl ether phosphate; alkyl sulfates such as ammonium lauryl sulfate, potassium lauryl sulfate, sodium lauryl sulfate, triethanolamine lauryl sulfate, and sodium cetyl sulfate; polyoxyethylene alkyl ether sulfates such as sodium POE lauryl ether sulfate, triethanolamine POE lauryl ether sulfate, sodium POE alkyl ether sulfate, and triethanolamine POE alkyl ether sulfate; alkyl ether carboxylates such as potassium POE lauryl ether acetate, sodium POE lauryl ether acetate, potassium POE tridecyl ether acetate, and sodium POE tridecyl ether acetate; and sulfonates such as sodium lauryl sulfoacetate, sodium tetradecene sulfonate, sodium dioctyl sulfosuccinate, sodium dialkyl sulfosuccinate, sodium alkylnaphthalene sulfonate, sodium alkyldiphenyl ether disulfonate, sodium alkanesulfonate, dodecylbenzenesulfonic acid, and sodium dodecylbenzenesulfonate. Furthermore, these include N-acyl glutamates such as N-coconut oil fatty acid acyl-L-glutamate triethanolamine, N-coconut oil fatty acid acyl-L-glutamate potassium, N-coconut oil fatty acid acyl-L-glutamate sodium, N-lauroyl-L-glutamate triethanolamine, N-lauroyl-L-glutamate potassium, N-lauroyl-L-glutamate sodium, N-myristoyl-L-glutamate potassium, N-myristoyl-L-glutamate sodium, and N-stearoyl-L-glutamate sodium; N-acylglycine salts such as N-coconut oil fatty acid acylglycine potassium and N-coconut oil fatty acid acylglycine sodium; N-acylalanine salts such as N-coconut oil fatty acid acyl-DL-alanine triethanolamine; and amino acid-type surfactants such as lauroyl methylalanine sodium.

[0017] The amphoteric surfactants include alkyl betaines such as lauryldimethylaminoacetic acid betaine (lauryl betaine), stearyl betaine, lauric acid amidopropyl betaine, lauryl hydroxysulfobetaine, stearyldimethylaminoacetic acid betaine, dodecylaminomethyldimethylsulfopropyl betaine, octadecylaminomethyldimethylsulfopropyl betaine, etc.; betaine types such as fatty acid amidopropyl betaines like coconut acid amidopropyl betaine, coconut oil fatty acid amidopropyldimethylaminoacetic acid betaine (cocamidopropyl betaine), cocamidopropyl hydroxysultaine, etc.; alkyl imidazole types such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, etc.; amino acid types such as sodium lauroyl glutamate, potassium lauroyl glutamate, lauroyl methyl-β-alanine, etc.; amine oxide types such as lauryldimethylamine N-oxide, oleyl dimethylamine N-oxide, etc.

[0018] The silicone-based surfactants include polyoxyethylene·methylpolysiloxane copolymer, polyoxypropylene·methylpolysiloxane copolymer, poly(oxyethylene·oxypropylene)·methylpolysiloxane copolymer, etc.

[0019] The natural surfactants include sodium surfactin, cyclodextrin, hydrogenated enzyme soy lecithin, etc.

[0020] When a surfactant is included, the amount of surfactant is not particularly limited. For example, the surfactant content is preferably 0.1% by mass or more, and more preferably 0.3% by mass or more, in the undiluted solution. Furthermore, the surfactant content is preferably 30% by mass or less, and more preferably 25% by mass or less. When the surfactant content is within the above range, when hydrofluoroolefin is included, the hydrofluoroolefin is easily emulsified in the aerosol composition. As a result, the aerosol product is easy to spray with a uniform composition. In addition, the sprayed aerosol composition is less likely to remain on the sprayed object, resulting in a superior user experience.

[0021] Alcohols include monohydric alcohols, polyhydric alcohols, etc.

[0022] Monohydric alcohols are suitably used for purposes such as making the spray particles finer, improving drying properties on the target object such as hair, and serving as a solvent for dissolving active ingredients that are poorly soluble in water.

[0023] Monohydric alcohols are not particularly limited. For example, monohydric alcohols include ethanol, isopropanol, and other monohydric alcohols with 2 to 3 carbon atoms.

[0024] Polyhydric alcohols are suitably used for purposes such as adjusting the drying properties on sprayed objects like hair.

[0025] Polyhydric alcohols are not particularly limited. For example, polyhydric alcohols include dihydric to tetrahydric alcohols such as propylene glycol, 1,3-butylene glycol, hexylene glycol, glycerin, dipropylene glycol, and diglycerin.

[0026] When alcohol is included, the alcohol content is not particularly limited. For example, the alcohol content is preferably 0.5% by mass or more, and more preferably 3% by mass or more, in the undiluted solution. Furthermore, the alcohol content is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution. When the alcohol content is within the above range, the aerosol product obtains the effects of alcohol formulation while reducing the noticeable flame length and improving stability against fire. In addition, the drying properties of the sprayed material are improved in the aerosol product. As a result, the aerosol product has a superior user experience.

[0027] Hair setting agents are not particularly limited. For example, hair setting agents include amphoteric types such as dialkylaminoethyl (meth)acrylate-(meth)acrylate alkyl ester copolymer, octylacrylamide-hydroxypropyl acrylate-butylaminoethyl methacrylate copolymer, and octylacrylamide-acrylates-butylaminoethyl methacrylate copolymer; nonionic types such as vinylpyrrolidone-vinyl acetate copolymer and hydroxyethyl acrylate-butyl acrylate-methoxyethyl acrylate copolymer; anionic types such as acrylate alkanolamine and (alkyl acrylate / octylacrylamide) copolymer; cationic types such as vinylpyrrolidone-N,N-dimethylaminoethyl methacrylate copolymer sulfate and hydroxyethylcellulose-dimethyldiallylammonium chloride; emulsion types such as alkyl acrylate copolymer emulsion and alkyl acrylate-styrene copolymer emulsion; and polyurethanes.

[0028] In particular, when the aerosol product of this embodiment is used as a hair styling product, the content (solid content) of the hair setting agent is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more, in the undiluted solution. Furthermore, the content (solid content) of the hair setting agent is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution. By having the content (solid content) of the hair setting agent within the above range, the aerosol product can be sprayed in a mist while providing appropriate setting performance, and the hair setting agent is less likely to clog the stem hole of the valve or the spray hole of the spraying member.

[0029] The active ingredients are not particularly limited. For example, in addition to the hair styling agents mentioned above, the active ingredients may include various fragrances such as natural and synthetic fragrances; cooling agents such as l-menthol, camphor, and peppermint oil; vitamins such as retinol, retinyl acetate, retinyl palmitate, calcium pantothenate, magnesium ascorbate phosphate, sodium ascorbate, dl-α-tocopherol, tocopherol acetate, tocopherol, tocopherol nicotinate, dibenzoylthiamine, riboflavin, and mixtures thereof; ascorbic acid, α-tocopherol, dibutylhydroxythiamine Antioxidants such as ruene and butylhydroxyanisole; amino acids such as glycine, alanine, leucine, serine, tryptophan, cysteine, methionine, aspartic acid, glutamic acid, and arginine; humectants such as collagen, hyaluronic acid, carotenoid acid, sodium lactate, dl-pyrrolidone carboxylate, keratin, casein, lecithin, and urea; preservatives such as parahydroxybenzoic acid esters and phenoxyethanol; sodium benzoate, potassium sorbate, benzalkonium chloride, benzethonium chloride, chlorhexidine chloride, parahydroxybenzoic acid Disinfectants such as chlormethacresol; extracts such as royal jelly extract, peony extract, loofah extract, rose extract, lemon extract, aloe extract, calamus root extract, eucalyptus extract, sage extract, tea extract, seaweed extract, placenta extract, and silk extract; astringents such as zinc oxide, allantoin hydroxyaluminum, tannic acid, citric acid, and lactic acid; anti-inflammatory agents such as allantoin, glycyrrhetinic acid, dipotassium glycyrrhizate, and azulene; methacrylate lauryl acid, methyl benzoate, methyl phenylacetate, and geranyl methyl benzoate. These include deodorants such as rotolate, acetophenone myristate, benzyl acetate, benzyl propionate, and green tea extract; UV absorbers such as diethylamino hydroxybenzoyl hexyl benzoate, 2-ethylhexyl paramethoxycinnamate, ethylhexyl triazone, oxybenzone, hydroxybenzophenone sulfonic acid, sodium dihydroxybenzophenone sulfonate, and dihydroxybenzophenone; UV scattering agents such as zinc oxide, titanium dioxide, and octyltrimethoxysilane-coated titanium dioxide; and whitening agents such as arbutin and kojic acid.

[0030] When an active ingredient is included, the amount of the active ingredient is not particularly limited. For example, the amount of the active ingredient is preferably 0.01% by mass or more, and more preferably 0.05% by mass or more, in the undiluted solution. Furthermore, the amount of the active ingredient is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution. When the amount of the active ingredient is within the above range, the aerosol product can obtain the effects of incorporating the active ingredient, while the aerosol composition can be easily sprayed in a mist, and differences in the concentration of the aerosol composition on the sprayed object are less likely to occur.

[0031] Water-soluble polymers are suitably used for purposes such as adjusting the spread of the mist and its adhesion to the target object.

[0032] Water-soluble polymers are not particularly limited. For example, water-soluble polymers include cellulosic polysaccharides such as hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, and sodium carboxymethylcellulose; gums such as carrageenan, xanthan gum, acacia gum, tragacanth gum, cationized guar gum, guar gum, gellan gum, and locust bean gum; and gelatin, dextran, sodium carboxymethyldextran, dextrin, pectin, starch, corn starch, wheat starch, sodium alginate, modified potato starch, hyaluronic acid, sodium hyaluronate, polyvinyl alcohol, polyvinylpyrrolidone, and carboxyvinyl polymer.

[0033] When a water-soluble polymer is included, the content of the water-soluble polymer is not particularly limited. For example, the content of the water-soluble polymer is preferably 0.001% by mass or more, and more preferably 0.005% by mass or more, in the undiluted solution. Furthermore, the content of the water-soluble polymer is preferably 5% by mass or less, and more preferably 3% by mass or less, in the undiluted solution. By having the content of the water-soluble polymer within the above range, the aerosol product will have the effects of incorporating the water-soluble polymer while being less likely to become sticky and having a superior feel.

[0034] Oils are preferably used to improve combability and add shine.

[0035] The oil content is not particularly limited. For example, the oil content may include hydrocarbon oils such as liquid paraffin, squalene, squalane, and isoparaffin; diisopropyl adipate, isopropyl myristate, isopropyl palmitate, cetyl octanoate, octyldodecyl myristate, butyl stearate, myristyl myristate, decyl oleate, cetyl lactate, isocetyl stearate, cetostearyl alcohol, diisopropyl adipate, diisobutyl adipate, diisopropyl sebacate, diethyl sebacate, diethylhexyl sebacate, diethylhexyl succinate, diethoxyethyl succinate, diisostearyl malate, bisethoxydiglycol cyclohexane-1,4-dicarboxylic acid, polyglyceryl-10 eicosanedioate-tetradecanedioate, bisethoxydiglycol cyclohexanedicarboxylic acid, diethyl peneopentanoate These include ester oils such as tandiol and methylpentanediol dieopentanoate; silicone oils such as methylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, tetrahydrotetramethylcyclotetrasiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, and polyglycerol-modified silicones; higher alcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and lanolin alcohol; liquid fatty acids such as isostearic acid; oils and fats such as avocado oil, macadamia nut oil, shea butter, olive oil, and camellia oil; and waxes such as beeswax and lanolin wax.

[0036] When oil is included, the amount of oil is not particularly limited. For example, the amount of oil is preferably 0.1% by mass or more, and more preferably 0.3% by mass or more, in the undiluted solution. Furthermore, the amount of oil is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution. When the amount of oil is within the above range, the aerosol product is stable and less prone to separation, while still obtaining the effects of incorporating oil.

[0037] Powders are suitably used for purposes such as improving usability, including enhancing slipperiness.

[0038] The powder is not particularly limited. For example, powders include talc, kaolin, mica, magnesium carbonate, calcium carbonate, zinc silicate, magnesium silicate, aluminum silicate, calcium silicate, silica, zeolite, ceramic powder, charcoal powder, nylon powder, silk powder, urethane powder, silicone powder, polyethylene powder, aluminum octenyl succinate corn starch, corn starch, etc.

[0039] When powder is included, the amount of powder is not particularly limited. For example, the amount of powder is preferably 0.1% by mass or more, and more preferably 0.3% by mass or more, in the undiluted solution. Furthermore, the amount of powder is preferably 5% by mass or less, and more preferably 3% by mass or less. When the amount of powder is within the above range, the aerosol product can obtain the effects of incorporating powder while easily spraying the powder-containing aerosol composition with a uniform composition.

[0040] Returning to the overall description of the undiluted solution, the content of the undiluted solution is not particularly limited. For example, the content of the undiluted solution is preferably 45% by mass or more, and more preferably 50% by mass or more, in the aerosol composition. Furthermore, the content of the undiluted solution is preferably 75% by mass or less, and more preferably 70% by mass or less, in the aerosol composition. When the content of the undiluted solution is within the above range, the aerosol product tends to have a stable spray state and is easily sprayed in a fine mist.

[0041] The method for preparing the stock solution is not particularly limited. For example, the stock solution can be prepared by dissolving a surfactant, active ingredients, etc., in water.

[0042] Dimethyl ether Dimethyl ether is used as a propellant to atomize and spray aerosol compositions.

[0043] The dimethyl ether content in the aerosol composition is preferably 20% by mass or more. Furthermore, the dimethyl ether content is preferably 30% by mass or less. If the dimethyl ether content is less than 20% by mass, the aerosol product will not spread easily in a mist form during spraying, and the spray state will be unstable. On the other hand, if the dimethyl ether content exceeds 30% by mass, the aerosol product will contain a large amount of flammable material, and there is a risk of ignition if a fire source is nearby when sprayed for a long time in a confined space.

[0044] • Hydrofluoroolefins The aerosol product of this embodiment may contain a hydrofluoroolefin. The hydrofluoroolefin is preferably a hydrofluoroolefin with a boiling point of 10 to 40°C, such as trans-1-chloro-3,3,3-trifluoropropene (HFO-1233zd(E), boiling point 19°C), cis-1-chloro-3,3,3-trifluoropropene (HFO-1233zd(Z), boiling point 39°C), and mixtures thereof.

[0045] When a hydrofluoroolefin with a boiling point of 10 to 40°C is included, the content of hydrofluoroolefin with a boiling point of 10 to 40°C in the aerosol composition is preferably 3% by mass or more, and more preferably 5% by mass or more. Furthermore, the content of hydrofluoroolefin with a boiling point of 10 to 40°C in the aerosol composition is preferably 30% by mass or less, and more preferably 25% by mass or less. When the hydrofluoroolefin content is within the above range, the aerosol product makes it easier to spray the aerosol composition in a stable, fine mist. In addition, the aerosol product makes it easier to spray the aerosol composition to the very end.

[0046] Returning to the overall description of the aerosol composition, the aerosol composition of this embodiment has a low dimethyl ether content of 20-30% by mass. Furthermore, as will be described later, the aerosol composition is filled into an aerosol container and sprayed. The aerosol container is equipped with a valve that has a housing with a gas phase introduction hole. Therefore, when the aerosol product is sprayed, the gas phase portion of dimethyl ether is easily ejected to the outside. As a result, when the amount of aerosol composition decreases due to spraying, the spray state of the aerosol product may change, and the mist spread may become narrower. On the other hand, the inclusion of hydrofluoroolefin in the aerosol composition makes such changes in the spray state less likely to occur. As a result, the spray state of the aerosol product becomes more stable.

[0047] The method for preparing the aerosol composition is not particularly limited. For example, the aerosol composition can be manufactured by filling a container body with the stock solution, attaching a valve to the container body, and then filling it with dimethyl ether. If the composition contains hydrofluoroolefin, a pre-mixed mixture of hydrofluoroolefin and dimethyl ether can be used for filling.

[0048] <Aerosol container> The aerosol product of this embodiment comprises an aerosol container for filling with the above-mentioned aerosol composition. The aerosol container mainly comprises a container body into which the above-mentioned aerosol composition is filled, a valve (aerosol valve) attached to the container body, and a spraying member attached to the aerosol valve.

[0049] (Container body) The container body is a pressure-resistant container filled with the aerosol composition, and is a bottomed cylindrical container. An aerosol valve is fitted to the opening of the container body.

[0050] The material of the container body is not particularly limited. For example, the material of the container body may be metal such as aluminum or tinplate, various synthetic resins, pressure-resistant glass, etc.

[0051] (Aerosol valve) An aerosol valve is a component used to close and seal the opening of a container body. The aerosol valve primarily comprises a housing, a stem with a stem hole connecting the inside and outside of the container body, and a stem rubber attached around the stem hole to close it.

[0052] The dimensions (cross-sectional area) of the stem hole are not particularly limited. For example, the dimensions (cross-sectional area) of the stem hole may be 0.05 mm. 2 Preferably, it should be 0.1 mm or more. 2 It is more preferable that the dimensions (cross-sectional area) of the stem hole be 0.3 mm. 2 Preferably, the following: 0.25 mm 2 The following is more preferable: When the dimensions (cross-sectional area) of the stem hole are within the above range, the aerosol product is easier to spray in a fine mist with good spread.

[0053] The housing is roughly cylindrical and houses the stem and spring. The stem is a roughly cylindrical part, and an internal stem passage is formed through which the aerosol composition drawn into the housing during spraying passes. Near the lower end of the internal stem passage, a stem hole is formed that connects the space inside the housing to the internal stem passage. A spraying member for spraying the aerosol composition is attached to the upper end of the stem. The stem rubber is attached around the stem hole and is a member that appropriately blocks the internal space of the housing from the outside. The stem rubber is a disc-shaped member, and when not spraying, its inner circumferential surface is in close contact with the outer circumferential surface of the stem where the stem hole is formed, thereby closing the stem hole.

[0054] In this embodiment, the aerosol product has a gas phase inlet on the side of the housing and a liquid phase inlet on the bottom of the housing.

[0055] The gas phase inlet is a lateral hole (through hole) formed on the side of the housing, which connects the gas phase portion of the aerosol composition inside the container body with the inside of the housing. When an aerosol product is sprayed, the inside and outside of the housing are connected, and according to the pressure difference with the outside, the gas phase portion of the aerosol composition (mainly dimethyl ether) is introduced into the housing through the gas phase inlet.

[0056] The dimensions (cross-sectional area) of the gas phase inlet are not particularly limited. For example, the dimensions (cross-sectional area) of the gas phase inlet are 0.01 mm. 2 Preferably, it is 0.03 mm or more. 2 It is more preferable that the above is true. Also, the dimensions (cross-sectional area) of the gas phase inlet hole should be 0.20 mm. 2 Preferably, the following: 0.15 mm 2 The following is more preferable: When the dimensions (cross-sectional area) of the gas phase inlet are within the above range, it is easier to introduce vaporized gas into the sprayed material and adjust the amount of flammable material sprayed per unit time, and the aerosol product has appropriate drying properties and is easy to spray in a fine mist.

[0057] The liquid-phase introduction hole is a vertical hole (through-hole) formed in the bottom surface of the housing, and communicates the liquid-phase portion of the aerosol composition in the container body with the inside of the housing. When the aerosol product is in communication with the outside during spraying, the liquid-phase portion of the aerosol composition is introduced into the housing through the liquid-phase introduction hole according to the pressure difference with the outside.

[0058] The dimensions (cross-sectional area) of the liquid-phase introduction hole are not particularly limited. For example, the dimensions (cross-sectional area) of the liquid-phase introduction hole are preferably 2 0.1 mm or more, and more preferably 2 0.2 mm or more. Also, the dimensions (cross-sectional area) of the liquid-phase introduction hole are preferably 2 5.0 mm or less, and more preferably 2 4.0 mm or less. When the dimensions (cross-sectional area) of the liquid-phase introduction hole are within the above range, it is easy to adjust the injection amount per unit time of the liquid-phase portion of the aerosol composition, and the aerosol product is likely to have a stable spraying state.

[0059] In the aerosol product, the gas-phase portion of the aerosol composition introduced into the housing through the gas-phase introduction hole and the liquid-phase portion of the aerosol composition introduced into the housing through the liquid-phase introduction hole are mixed inside the housing. Thereby, the injection amount of the combustible material per unit time of the aerosol composition is reduced as compared with the case where the gas-phase introduction hole is not provided. The aerosol product has appropriate dryness by adjusting the injection amount of the volatile combustible material to an appropriate range, can make the mist finer, and enhances the safety of the sprayed aerosol composition.

[0060] (Spraying member) The spraying member is a component for spraying an aerosol composition and is attached to the upper end of the stem. The spraying member mainly comprises a nozzle portion and an operating portion operated by the user with their fingers or the like. The nozzle portion is a substantially cylindrical part and has a spray passage through which the aerosol composition passes. An opening (spray hole) is formed at the tip of the spray passage. The aerosol composition is sprayed from the spray hole. The number and shape of the spray holes are not particularly limited. There may be multiple spray holes. The shape of the spray holes may be substantially circular, substantially angular, etc.

[0061] The dimensions (cross-sectional area) of the nozzle are not particularly limited. For example, the dimensions (cross-sectional area) of the nozzle may be 0.05 mm. 2 Preferably, it should be 0.1 mm or more. 2 It is more preferable that the dimensions (cross-sectional area) of the injection hole be 0.3 mm. 2 Preferably, the following: 0.25 mm 2 The following is more preferable: When the dimensions (cross-sectional area) of the spray nozzle are within the above range, the aerosol product is easier to spray in a fine mist with good spread.

[0062] In this embodiment of the aerosol product, when the spraying member is pressed down, the stem of the aerosol valve is also pressed down. This causes the stem rubber to bend downward, opening the stem hole. As a result, the inside and outside of the container body are connected. When the inside and outside of the container body are connected, the pressure difference between the inside and outside of the container body draws the gaseous and liquid phases of the aerosol composition into the housing and mixes them. The aerosol composition then passes through the stem hole and the internal stem passage, is sent to the spraying member, and is subsequently sprayed from the spray hole.

[0063] In this embodiment, the aerosol product has a specific range for the amount of flammable material sprayed per unit time from the aerosol composition. Specifically, the amount of flammable material sprayed from the aerosol composition is 0.05 g / second or more, preferably 0.1 g / second or more. Furthermore, the amount of flammable material sprayed from the aerosol composition is 0.24 g / second or less, preferably 0.22 g / second or less. By having the amount of flammable material sprayed within the above range, the aerosol product exhibits less flame length, can be sprayed in a mist even when used in a confined space, and enhances safety from fire. If the amount of flammable material sprayed is less than 0.05 g / second, the aerosol product will produce a coarser mist, resulting in poor drying properties and unstable spraying. On the other hand, if the amount of flammable material sprayed exceeds 0.24 g, the aerosol product may ignite if sprayed for a long time in a confined space or if there is a fire source nearby. In this embodiment, the amount of flammable material sprayed represents the amount of flammable material (for example, dimethyl ether, monohydric alcohol contained in the undiluted solution, oil, etc., that have a flash point) sprayed from the aerosol product.

[0064] In this embodiment, even with a low dimethyl ether content, the aerosol product is provided with a gas phase introduction port in the valve housing of the aerosol container to introduce the gas phase portion of the aerosol composition, and by controlling the amount of flammable material sprayed within a specific range, a fine mist and stable spray state can be achieved. Furthermore, when hydrofluoroolefin is included, the aerosol product produces a more easily spreading mist and a more stable spray state. Therefore, the aerosol product offers high fire safety.

[0065] One embodiment of the present invention has been described above. The present invention is not particularly limited to the above embodiment. The above embodiment mainly describes an invention having the following configuration.

[0066] (1) An aerosol product comprising an aerosol composition and an aerosol container having a valve and filled with the aerosol composition, wherein the aerosol composition comprises a stock solution containing water and dimethyl ether, the dimethyl ether content is 20 to 30% by mass of the aerosol composition, the valve comprises a housing provided with a gas phase introduction hole for introducing the gas phase portion of the aerosol composition, and the amount of flammable material contained in the aerosol composition sprayed is 0.05 to 0.24 g / second.

[0067] With this configuration, the aerosol product contains a specific amount of dimethyl ether, and by using a valve equipped with a gas phase introduction port to control the amount of flammable material in the spray at 0.05 to 0.24 g / second, a fine mist with stable spraying properties and appropriate drying characteristics can be achieved. Furthermore, the aerosol product offers high fire safety.

[0068] (2) The aerosol product according to (1), wherein the aerosol composition contains 3 to 30% by mass of a hydrofluoroolefin having a boiling point of 10 to 40°C.

[0069] With this configuration, aerosol products are easier to spray in a fine mist, and a more stable spray state can be obtained until the entire volume of the aerosol composition is sprayed.

[0070] (3) The aerosol product according to (1) or (2), wherein the water content is 60 to 99% by mass in the undiluted solution.

[0071] With this configuration, aerosol products are less likely to cause the flame to spread when sprayed onto a flame. Furthermore, aerosol products are less likely to ignite even if there is a nearby ignition source when sprayed in a confined space.

[0072] (4) The stock solution is an aerosol product according to any one of (1) to (3), comprising a surfactant.

[0073] With this configuration, aerosol products tend to achieve a more stable spray pattern. In particular, when aerosol products contain hydrofluoroolefins, the emulsification of the oil layer makes it easier to achieve a uniform composition and a stable spray pattern.

[0074] (5) The aerosol product according to any one of (1) to (4), wherein the stock solution contains alcohol, and the alcohol content is 0.5 to 20% by mass in the stock solution.

[0075] With this configuration, aerosol products tend to have improved drying properties. As a result, aerosol products offer a superior user experience.

[0076] (6) The undiluted solution is an aerosol product according to any one of (1) to (5), which includes a hair styling agent.

[0077] With this configuration, the aerosol product adheres well to the hair with minimal scattering when sprayed. Furthermore, the aerosol product dries appropriately on the hair, resulting in excellent styling properties. [Examples]

[0078] The present invention will be described more specifically below with reference to examples. The present invention is not limited in any way to these examples.

[0079] Stock solutions A to D were prepared according to the formulations (unit: mass%) listed in Table 1 below.

[0080] [Table 1]

[0081] (Examples 1-2, Comparative Examples 1-2) The undiluted solution was filled into an aluminum container body according to the formulation (unit: mass%) shown in Table 2 below, and a valve was attached. Stem (stem hole: 0.13 mm) 2 Dimethyl ether was filled into the mixture to produce an aerosol product.

[0082] [Table 2]

[0083] For the aerosol products of Examples 1-2 and Comparative Examples 1-2, the following evaluation methods were used to assess the spraying state, the amount of flammable material sprayed (g / second), and the time to reach the lower explosive limit (seconds / m³). 3 The flame length was measured and evaluated. The results are shown in Table 2.

[0084] (Injection state) The aerosol products were adjusted to 20°C, sprayed into the air, and evaluated according to the following evaluation criteria. (Evaluation Criteria) ◎: The spray was able to be ejected in a mist-like form until the very end. ○: The spray can be atomized with a stable spread until the contents of the aerosol composition reach at least 10% by mass, but the spread narrows when the contents of the aerosol composition fall below 10% by mass. △: The spray can be atomized with a stable spread until the contents of the aerosol composition reach at least 25% by mass, but the spread narrows when the contents of the aerosol composition fall below 25% by mass. ×: The ejected material could not be ejected completely, resulting in a residue of 5% or more by mass.

[0085] (Amount of flammable material sprayed) The aerosol product was adjusted to 20°C, the amount of aerosol composition sprayed over 5 seconds was measured, and the amount of flammable material sprayed (g / second) was calculated from that amount.

[0086] (Time to reach the lower limit of explosion) Based on Section 31.5 of the UN Recommendations, Test Methods and Criteria Manual concerning the Transport of Dangerous Goods, a cylindrical test container (internal volume: 0.2 m³) containing a burning candle was used for the closed-space ignition test. 3 In a 1m space, the contents of an aerosol product adjusted to 20°C were sprayed, and the time required for ignition and the amount sprayed were measured. 3Time to reach the lower explosive limit concentration inside (seconds / m 3 The following was calculated: The time to reach the lower explosive limit concentration was 300 seconds / m³. 3 In the above cases, mark with ○, and 300 seconds / m 3 Values ​​less than a certain value were evaluated as ×.

[0087] (flame length) The aerosol product was adjusted to 20°C and sprayed onto a flame 5 cm high from 15 cm behind. The flame extension (flame length) was evaluated according to the following evaluation criteria. (Evaluation Criteria) None: No flame leader was identified. Yes: The flame leader was recognized.

[0088] As shown in Table 2, the aerosol products of Examples 1 and 2 of the present invention were able to be sprayed in a mist form until the end, contained a small amount of flammable material, reached the lower explosive limit concentration in 300 seconds or more, and did not exhibit a flame length. On the other hand, the aerosol products of Comparative Examples 1 and 2, which contained a large amount of dimethyl ether, reached the lower explosive limit concentration in less than 300 seconds and exhibited a flame length.

[0089] Stock solutions E to G were prepared according to the formulations (unit: mass%) listed in Table 3 below.

[0090] [Table 3]

[0091] (Examples 3-10, Comparative Example 3) The undiluted solution was filled into an aluminum container body according to the formulation (unit: mass%) shown in Table 4 below, and a valve was attached. Stem (stem hole: 0.13 mm) 2 Dimethyl ether and hydrofluoroolefin (trans-1-chloro-3,3,3-trifluoropropene (HFO-1233zd(E))) were filled into the mixture to prepare an aerosol product.

[0092] [Table 4]

[0093] As shown in Table 4, the aerosol products of Examples 3 to 10 of the present invention were able to be sprayed in a mist form almost to the very end, contained a small amount of flammable material, reached the lower explosive limit concentration in 300 seconds or more, and did not exhibit a flame length. On the other hand, the aerosol product of Comparative Example 3, which did not have a gas phase introduction hole, did not exhibit a flame length, but contained a large amount of flammable material, and reached the lower explosive limit concentration in less than 300 seconds. Therefore, it was found that the aerosol product of Comparative Example 3 posed a risk of ignition if a fire source was nearby when sprayed in a confined space.

[0094] (Example prescription 1) Hair spray The stock solution H, prepared according to the formulation (unit: mass%) shown in Table 5 below, was filled into an aluminum container and a valve was attached. Stem (stem hole: 0.13 mm) 2 Dimethyl ether and hydrofluoroolefin were added to the mixture to produce an aerosol product. Stock solution H Wednesday 92.77 PEG-40 Hydrogenated Castor Oil (*1) 0.50 Octylacrylamide-hydroxypropyl acrylate- Butylaminoethyl methacrylate copolymer (*3) 5.00 Potassium hydroxide 0.63 Polyglyceryl-10 eicosanedioate-tetradecanediate, Glycerin (*4) 1.00 Methylparaben 0.10 Total 100.00 (*3) AMPHOMER28-4910 (product name), manufactured by Nurion Japan Co., Ltd. (*4) Neosolue-AquaS (product name), manufactured by Nippon Seika Co., Ltd.

[0095] [Table 5]

[0096] As shown in Table 5, the aerosol product (hair spray) of Formulation Example 1 was able to be sprayed in a mist until the end, contained a small amount of flammable material, reached the lower explosive limit in more than 300 seconds, and did not produce a flame. Furthermore, when sprayed onto the hair, the aerosol product (hair spray) of Formulation Example 1 adhered well to the hair with minimal scattering. In addition, the aerosol product (hair spray) of Formulation Example 1 dried appropriately and provided excellent styling properties.

[0097] (Example prescription 2) Hair spray The stock solution I, prepared according to the formulation (unit: mass%) shown in Table 6 below, was filled into an aluminum container and a valve was attached. Stem (stem hole: 0.17 mm) 2 Dimethyl ether was added to the mixture to create an aerosol product. The solid content of the hair styling agent is 6.5%. Stock solution I Wednesday 77.0 Alkyl acrylate copolymer emulsion (*5) 17.5 Polyurethane-14, Acrylates Copolymer AMP, Alcohol, water (*6) 5.0 Phenoxyethanol 0.5 Total 100.0 (*5) Yodzol GH256F (product name), solid content 29%, manufactured by Nurion Japan Co., Ltd. (*6) DynamX (product name), solids content 28%, manufactured by Nurion Japan Co., Ltd.

[0098] [Table 6]

[0099] As shown in Table 6, the aerosol product (hair spray) of Formulation Example 2 was able to be sprayed in a mist until the end, contained a small amount of flammable material, reached the lower explosive limit in more than 300 seconds, and no flame length was observed. Furthermore, when sprayed on the hair, the aerosol product (hair spray) of Formulation Example 2 adhered well to the hair with minimal scattering. In addition, the aerosol product (hair spray) of Formulation Example 2 dried appropriately and provided excellent styling properties.

Claims

1. The aerosol comprises an aerosol composition and an aerosol container having a valve for filling with the aerosol composition. The aerosol composition comprises a concentrate containing water and dimethyl ether. The dimethyl ether content in the aerosol composition is 20 to 30% by mass. The valve comprises a housing provided with a gas phase introduction hole for introducing the gas phase portion of the aerosol composition, The amount of flammable material sprayed in the aerosol composition is 0.05 to 0.24 g / second. The aerosol product has a water content of 60 to 99% by mass in the undiluted solution.

2. The aerosol product according to claim 1, wherein the aerosol composition contains 3 to 30% by mass of a hydrofluoroolefin having a boiling point of 10 to 40°C.

3. The stock solution comprises a surfactant, as described in claim 1 or 2, for the aerosol product.

4. The aforementioned undiluted solution contains alcohol, The aerosol product according to claim 1 or 2, wherein the alcohol content is 0.5 to 20% by mass in the undiluted solution.

5. The aerosol product according to claim 1 or 2, wherein the undiluted solution contains a hair styling agent.

6. The stock solution contains alcohol, The alcohol content is 0.5 to 20% by mass in the undiluted solution. The aerosol product according to claim 1 or 2, wherein the undiluted solution contains a hair styling agent.

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