Aerosol shower products and their usage instructions

Abstract

To provide a shower aerosol product that is superior in terms of usability and hygiene. [Solution] The shower aerosol product of the present invention comprises an aerosol container, a composition filled in the aerosol container, and a propellant filled in the aerosol container, and is used by injecting the composition into a shower device by discharging the composition from the aerosol container.

Description

Technical Field

[0001] The present invention relates to aerosol products for showers. The present invention also relates to a method of using the above aerosol products for showers.

Background Art

[0002] There is known a cosmetic cartridge for showers that is disposed and used in a shower device provided in a bathroom or a washroom. As described in Patent Documents 1 and 2, the cosmetic cartridge for showers generally contains a solid cosmetic composition. In the above cosmetic cartridge for showers, the solid cosmetic composition is eluted into water (cold water or hot water) flowing through the shower device, and a mixture of the cosmetic composition and water is sprayed from the shower head and applied to the skin of the user.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional cosmetic cartridge for showers (shower product) provided with a solid cosmetic composition, since the solid cosmetic composition is stored in a state of being in contact with water in the shower device, there are problems in terms of hygiene.

[0005] If it is possible to inject a desired amount of the composition into the shower device only at the time of use, it is considered that this contributes to an improvement in hygiene. However, it is desirable that a desired amount of the composition can be easily injected into the shower device, that is, the usability of the shower product is high.

[0006] The object of the present invention is to provide a shower aerosol product that is excellent in terms of usability and hygiene. Furthermore, the present invention also aims to provide a method for using the above-mentioned shower aerosol product. [Means for solving the problem]

[0007] The present invention provides a shower aerosol product comprising an aerosol container, a composition filled in the aerosol container, and a propellant filled in the aerosol container, wherein the composition is injected into a shower device by discharging the composition from the aerosol container.

[0008] In the shower aerosol product of the present invention, it is preferable that the viscosity of the composition at 25°C is 5000 mPa·s or more.

[0009] In the shower aerosol product of the present invention, it is preferable that the composition is a cosmetic composition.

[0010] In the shower aerosol product of the present invention, the composition may or may not contain water, and if the composition contains water, it is preferable that the water content is 40.0% by mass or less in 100% by mass of the composition.

[0011] In the shower aerosol product of the present invention, it is preferable that the internal pressure of the aerosol container is 0.30 MPa or higher and 0.95 MPa or lower at 25°C.

[0012] In the shower aerosol product of the present invention, it is preferable that the aerosol container comprises an outer container and an inner container, the inner container is housed in the outer container, the composition is filled in the inner container, and the propellant is filled in the space between the outer container and the inner container.

[0013] In the shower aerosol product of the present invention, it is preferable that the propellant is filled in the space between the outer container and the inner container such that the internal pressure at 25°C is 0.30 MPa or more and 0.95 MPa or less.

[0014] In the shower aerosol product of the present invention, the inner container is preferably a bag.

[0015] The present invention provides a method for using the above-described shower aerosol product, comprising the steps of: injecting the composition into a shower device by discharging the composition from the aerosol container; and discharging a mixture of the composition and water from the shower head of the shower device. [Effects of the Invention]

[0016] The shower aerosol product of the present invention comprises an aerosol container, a composition filled in the aerosol container, and a propellant filled in the aerosol container. The shower aerosol product of the present invention is used by injecting the composition into a shower device by discharging the composition from the aerosol container. Because the shower aerosol product of the present invention has the above configuration, it is excellent in terms of usability and hygiene. [Modes for carrying out the invention]

[0017] The present invention will be described in detail below.

[0018] The shower aerosol product of the present invention (hereinafter sometimes abbreviated as "aerosol product") comprises an aerosol container, a composition filled in the aerosol container, and a propellant filled in the aerosol container. The aerosol product of the present invention is used by injecting the composition into a shower device by discharging the composition from the aerosol container.

[0019] The aerosol product of the present invention, having the above configuration, offers excellent usability and hygiene.

[0020] Since the product of the present invention is an aerosol product, it can be structured such that the above composition can be discharged from the above aerosol container whether in a upright state or an inverted state as needed. Also, since the product of the present invention is an aerosol product, it has good operability. Further, since the product of the present invention is an aerosol product, for example, the composition can be discharged from the aerosol container only while the stem is being pushed down (for example, while the spray button is being pressed). Therefore, the aerosol product of the present invention can easily discharge a desired amount of the composition from the aerosol container and is excellent in usability.

[0021] Since the product of the present invention is an aerosol product, a desired amount of the composition can be injected into the shower device only during use. Therefore, the aerosol product of the present invention is excellent in terms of hygiene.

[0022] In this specification, the "aerosol product" means a product having a mechanism for discharging the content (composition) by the pressure of an ejectant (such as liquefied gas or compressed gas). Also, in this specification, the "aerosol container" means a container used to make the above mechanism function. The above "aerosol product" includes, for example, a product having a double - structure container with an outer container and an inner container (for example, an inner bag attached to the outer container and a valve), where the inner container is filled with the content and the ejectant is filled between the outer container and the inner container. Also, the above "aerosol product" includes a product where only the content is discharged (the ejectant is not discharged) during use.

[0023] In conventional shower products with solid compositions, there is a problem that the amount of elution of the solid composition fluctuates depending on the water temperature and the water pressure of the shower, so the amount of the composition discharged from the shower head cannot be sufficiently controlled. In contrast, since the product of the present invention is an aerosol product, a desired amount of the composition can be injected into the shower device, and the entire amount of the injected composition can be discharged from the shower head of the shower device. The above composition is mixed with water (diluted with water) in the shower device and discharged from the shower head of the shower device as a mixed liquid of the above composition and water. Therefore, the product of the present invention is also excellent in that it is easy to control the amount of the composition discharged from the shower head.

[0024] Further, since the product of the present invention is an aerosol product, a composition having a considerably high viscosity can be injected into the shower device regardless of the viscosity of the composition. Furthermore, since the product of the present invention is an aerosol product, it is not always necessary to include excipients (such as polymers and powders) in the composition. Therefore, the variations in the formulation design of the composition in shower products can be increased. For example, a composition in which a desired component is formulated at a high concentration can also be used. In this case, for example, the feeling of use (the feeling that the composition remains on the skin) can be enhanced.

[0025] The aerosol product of the present invention is used by injecting the above composition into the shower device by discharging the above composition from the above aerosol container. The above shower device usually has a shower head. The above shower head usually has a shower head body and a water distribution plate. Note that the above shower device may have a shower head and a shower hose.

[0026] The shower device described above preferably has an injection mechanism (inlet) for injecting the composition described above. The injection mechanism may include, for example, a valve or a cock. In the shower device described above, the shower head may have the injection mechanism, the shower hose may have the injection mechanism, or other components may have the injection mechanism. When the shower head has the injection mechanism, it is preferable that the shower head body also has the injection mechanism.

[0027] In the aerosol product of the present invention, the method of injecting the above composition into the shower device is not particularly limited. The aerosol product of the present invention is used, for example, by connecting the discharge port portion of the aerosol product to the injection mechanism (inlet) of the shower device when using the aerosol product, and then discharging the above composition from the aerosol container to inject the composition into the shower device. When connecting the aerosol product and the injection mechanism of the shower device, the stem of the aerosol product and the injection mechanism of the shower device may be connected directly, or they may be connected via a button or nozzle. Furthermore, a space for temporarily holding the above composition may be provided inside the shower device. The shower device may have a structure such that when water is passed through, the water and the above composition mix in this space to form a mixed liquid, and this mixed liquid is then sent out.

[0028] [Composition] The composition of the above-mentioned compositions can be appropriately designed according to the desired function. Examples of the above-mentioned compositions include cosmetic compositions, cleansing compositions, and medical compositions (pharmaceutical compositions).

[0029] The above composition is preferably a cosmetic composition. Examples of the above cosmetic composition include skin cosmetic compositions and hair cosmetic compositions. The above cosmetic composition may also be a cosmetic composition that can be used in combination on both skin and hair. Examples of the above cosmetic composition include skin care compositions, skin cleansing compositions, and deodorant compositions.

[0030] The above composition may also be an emulsified composition.

[0031] The viscosity of the above composition at 25°C is preferably 5000 mPa·s or more, more preferably 10000 mPa·s or more, even more preferably 15000 mPa·s or more, and particularly preferably 20000 mPa·s or more. In the case of a highly viscous composition, it is difficult to inject the composition into the shower device using, for example, a syringe. In contrast, in the present invention, the composition can be injected into the shower device by discharging it from an aerosol container using an aerosol mechanism, so even if the composition has a relatively high viscosity, it is easy to use. Also, concentrated compositions often have high viscosity, and such concentrated compositions are sprayed from the shower device as a mixture with a relatively high concentration of components even when diluted with water during use. For this reason, if the viscosity is above the lower limit, the feeling of use (the feeling that the composition is staying on the skin) can be further enhanced. Furthermore, since highly viscous compositions have a somewhat longer dissolution time, the feeling of use is enhanced if the viscosity is above the lower limit. The upper limit of the viscosity of the above composition at 25°C is not particularly limited as long as the composition can be dispensed from the aerosol container. The viscosity of the above composition at 25°C may be 100,000 mPa·s or less, or 50,000 mPa·s or less. If the viscosity is below the above upper limit, the composition can be injected into the shower device in a shorter time.

[0032] The viscosity described above is measured using a Type B viscometer with a No. 3 rotor at a rotation speed of 6 rpm and a rotation time of 1 minute. For example, the "TV-25 viscometer" manufactured by Toki Sangyo Co., Ltd. can be used as the Type B viscometer.

[0033] The normal stress of the above composition at 25°C, as measured by the normal stress measurement method described below, may be 40 gf or less. Even if the viscosity of the above composition at 25°C exceeds 100,000 mPa·s (for example, exceeding the appropriate detection limit of viscosity measurement with a B-type viscometer), the composition can be injected into the shower device in a shorter time if the normal stress is below the above upper limit.

[0034] <Method for measuring normal stress> Fill a container with an opening of 30 mm or more in diameter (e.g., a beaker or wide-mouthed jar) with the composition to a height of 22 mm or more from the bottom of the container, and leave it standing at 25°C. Next, while it is standing, insert (push in) a 10φ spherical adapter from above the composition, perpendicular to the top surface of the composition, at a speed of 60 mm / min, to a depth of 20 mm from the top surface of the composition, and define the stress at this time as the normal stress.

[0035] A smaller normal stress indicates a softer composition, while a larger normal stress indicates a harder composition. The normal stress can be measured using a stress measuring device. Examples of such stress measuring devices include the "Rheometer Series" manufactured by Sun Science Co., Ltd. (for example, the "Rheometer CR-500DX").

[0036] The above composition may or may not contain water. The above composition may or may not contain water. When the above composition contains water, the amount of water in 100% by mass of the above composition is preferably 40.0% by mass or less, more preferably 30.0% by mass or less, and even more preferably 20.0% by mass or less. When the amount of water is below the above upper limit, a concentrated composition can be made, which can enhance the feeling of use. The amount of water in 100% by mass of the above composition may be 0% by mass (not contained). From the viewpoint of further enhancing the stability of the above composition, the amount of water in 100% by mass of the above composition may be 1.0% by mass or more, or 3.0% by mass or more.

[0037] The above composition may or may not contain an oily agent. The above composition may or may not contain an oily agent. The above oily agent may be used alone, or two or more may be used in combination.

[0038] Examples of the above-mentioned oils include hydrocarbon oils, ester oils, silicone oils, animal and vegetable oils, higher alcohols, and higher fatty acids.

[0039] Examples of the above-mentioned hydrocarbon oils include α-olefin oligomers, petrolatum, isoparaffins, light isoparaffins, light liquid isoparaffins, squalane, liquid isoparaffins, liquid paraffins (mineral oil), hydrogenated polyisobutene, hydrogenated (tetradecenyl / methylpentadecene), isododecane, microcrystalline wax, paraffin wax, polyethylene wax, and synthetic waxes (Fischer-Tropsch wax, etc.).

[0040] The above ester oils include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, isopropyl isostearate, propylene glycol isostearate, cetyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, caprylic / capric triglyceride, isononyl isononanoate, diisopropyl adipate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraisostearate, and phosphorus. Examples include diisostearyl hydroxylate, erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate, hexa(hydroxystearate / stearate / rosinate)dipentaerythrityl, tetra(hydroxystearate / isostearate)dipentaerythrityl, hexahydroxystearate dipentaerythrityl, (ethylhexanoate / stearate / adipate)glyceryl, tri(caprylic / capric / myristic / stearate)glyceryl, and hexa(behenate / benzoate / ethylhexanoate)dipentaerythrityl.

[0041] Examples of the above-mentioned silicone oils include dimethyl silicones such as methylpolysiloxane and highly polymerized methylpolysiloxane; methylphenyl silicone oils such as methylphenylpolysiloxane; cyclic silicones such as methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; amino-modified silicones such as aminopropylmethylsiloxane-dimethylsiloxane copolymer, aminoethylaminopropylsiloxane-dimethylsiloxane copolymer, and aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer; carboxy-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, and alkyl-modified silicones; and methylhydrogenpolysiloxane and dimethiconol.

[0042] The above animal and vegetable oils include macadamia nut oil, eucalyptus oil, coconut oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea butter, cocoa butter, almond oil, sunflower oil, rosehip oil, olive squalane, camellia oil, kiwi fruit seed oil, camellia oil, apricot kernel oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, meadowfoam oil, peppermint oil, argan oil, Examples include carrot oil, lavender oil, sugar squalane, damask rose flower wax, centifolia rose flower wax, jasmine flower wax, hydrogenated versions of these (e.g., hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, hydrogenated soybean oil, etc.), carnauba wax, candelilla wax, sunflower seed wax, rice bran wax, Japanese wax, sugarcane wax, beeswax, shellac wax, whale wax, and lanolin.

[0043] Examples of the above-mentioned higher alcohols include aliphatic alcohols with 8 to 22 carbon atoms. More specifically, examples of the above-mentioned higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, isostearyl alcohol, cetostearyl alcohol, and oleyl alcohol.

[0044] Examples of the above-mentioned higher fatty acids include fatty acids with 8 to 22 carbon atoms. More specifically, examples of the above-mentioned higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and behenic acid.

[0045] When the above composition contains an oil, the content of the oil in 100% by mass of the above composition is preferably 40.0% by mass or more, more preferably 50.0% by mass or more, even more preferably 60.0% by mass or more, preferably 95.0% by mass or less, more preferably 90.0% by mass or less, even more preferably 85.0% by mass or less, and particularly preferably 80.0% by mass or less. When the content of the oil is above the lower limit and below the upper limit, the user experience can be further enhanced. In addition, the stability of the composition can be further enhanced.

[0046] The above composition may or may not contain a polyhydric alcohol. The above composition may or may not contain a polyhydric alcohol. The above polyhydric alcohol may be used alone or in combination of two or more types.

[0047] Examples of polyhydric alcohols include glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol, polyethylene glycol, and sugar alcohols. Examples of sugar alcohols include glucose, maltose, sorbitol, maltitol, trehalose, erythritol, arabitol, ribitol, xylitol, galactitol, mannitol, and sucrose.

[0048] When the above composition contains a polyhydric alcohol, the content of the polyhydric alcohol in 100% by mass of the above composition is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, particularly preferably 4.0% by mass or more, preferably 10.0% by mass or less, more preferably 9.0% by mass or less, and even more preferably 8.0% by mass or less. When the content of the polyhydric alcohol is above the lower limit and below the upper limit, the compatibility between the above composition and the water (cold water or hot water) that flows through the shower device can be improved. Furthermore, the stability of the composition can be further improved.

[0049] The above composition may or may not contain a surfactant. The above composition may or may not contain a surfactant. By using the above surfactant, the above composition can be made into an emulsified composition. Examples of the above surfactant include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. Only one of the above surfactants may be used, or two or more may be used in combination.

[0050] The above composition may contain other components besides the components mentioned above (water, oils, polyhydric alcohols, and surfactants). Examples of these other components include lower alcohols, cooling agents, pH adjusters, preservatives, antioxidants, chelating agents (such as EDTA), vitamins, plant and animal extracts, pearlescent agents, disinfectants, UV absorbers, clay minerals, powders, colorants, and fragrances. Each of these other components may be used individually or in combination of two or more.

[0051] (Preferred embodiment of the composition (cosmetic composition)) Preferred embodiments of the above composition will be described below. However, the following embodiments are merely illustrative, and the above composition is not limited to these embodiments. In the following embodiments, the above composition is a cosmetic composition.

[0052] The above cosmetic composition contains a hydrocarbon oil and a polyhydric alcohol. The above cosmetic composition may or may not contain water. Preferably, the above cosmetic composition contains a nonionic surfactant.

[0053] In the following explanation, the above-mentioned "hydrocarbon oil" may be referred to as "component (A)", the above-mentioned "polyhydric alcohol" as "component (B)", the above-mentioned "water" as "component (C)", and the above-mentioned "nonionic surfactant" as "component (D)".

[0054] Therefore, the above cosmetic composition contains component (A) and component (B). The above cosmetic composition may or may not contain component (C). The above cosmetic composition preferably contains component (D). However, the above cosmetic composition may also contain other components other than components (A) to (D).

[0055] The above components, for example, component (A), component (B), component (D), and other components, may be used individually or in combination of two or more types.

[0056] <Ingredient (A)> Component (A) is a hydrocarbon oil. Using component (A) can enhance the user experience (the feeling that the cosmetic composition remains on the skin). Furthermore, using component (A) can improve the stability of the cosmetic composition. Additionally, using component (A) can provide a moisturizing effect. Component (A) may be used alone, or two or more types may be used in combination.

[0057] Component (A) includes the hydrocarbon oils mentioned above.

[0058] In the above cosmetic composition by mass, the content of component (A) is preferably 50.0% or more by mass, more preferably 60.0% or more by mass, preferably 92.0% or less by mass, more preferably 85.0% or less by mass, and even more preferably 80.0% or less by mass. When the content of component (A) is above the lower limit and below the upper limit, the user experience can be further enhanced. Furthermore, the stability of the cosmetic composition can be further enhanced.

[0059] <Ingredient (B)> Component (B) is a polyhydric alcohol. By using component (B), the compatibility between the cosmetic composition and the water (cold or hot water) flowing through the shower device can be improved. Furthermore, by using component (B), the stability of the cosmetic composition can be improved. Component (B) may be used alone, or two or more types may be used in combination.

[0060] Component (B) includes the polyhydric alcohols mentioned above.

[0061] Component (B) preferably contains glycerin and dipropylene glycol. In this case, the compatibility between the cosmetic composition and the water (cold or hot water) flowing through the shower device can be further enhanced. Furthermore, the stability of the cosmetic composition can be further enhanced.

[0062] In the following explanation, the above-mentioned "glycerin" may be referred to as "ingredient (B1)," and the above-mentioned "dipropylene glycol" may be referred to as "ingredient (B2)."

[0063] Therefore, it is preferable that component (B) contains component (B1) and component (B2). The above cosmetic composition is preferably composed of component (B1) and component (B2).

[0064] In the above cosmetic composition, the mass ratio of the content of component (B1) to the content of component (B2) (content of component (B1) / content of component (B2)) is preferably 2.0 or more, more preferably 4.0 or more, preferably 20.0 or less, more preferably 10.0 or less, and even more preferably 8.0 or less. When the above mass ratio (content of component (B1) / content of component (B2)) is above the lower limit and below the upper limit, the compatibility between the cosmetic composition and the water (cold water or hot water) flowing through the shower device can be further improved. Furthermore, the stability of the cosmetic composition can be further improved.

[0065] In 100% by mass of the above cosmetic composition, the content of component (B) is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, particularly preferably 4.0% by mass or more, preferably 10.0% by mass or less, more preferably 9.0% by mass or less, and even more preferably 8.0% by mass or less. When the content of component (B) is above the lower limit and below the upper limit, the compatibility between the cosmetic composition and the water (cold water or hot water) flowing through the shower device can be further enhanced. In addition, the stability of the cosmetic composition can be further enhanced.

[0066] In 100% by mass of the above cosmetic composition, the total content of component (B1) and component (B2) is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, particularly preferably 4.0% by mass or more, preferably 10.0% by mass or less, more preferably 9.0% by mass or less, and even more preferably 8.0% by mass or less. When the above total is above the lower limit and below the upper limit, the compatibility between the cosmetic composition and the water (cold water or hot water) flowing through the shower device can be further enhanced. Furthermore, the stability of the cosmetic composition can be further enhanced.

[0067] <Ingredient (C)> Component (C) is water. The above cosmetic composition may or may not contain component (C). Component (C) is preferably purified water.

[0068] When the above cosmetic composition contains component (C), the content of component (C) in 100% by mass of the above cosmetic composition is preferably 40.0% by mass or less, more preferably 30.0% by mass or less, and even more preferably 20.0% by mass or less. When the content of component (C) is below the above upper limit, a concentrated cosmetic composition can be made, which can enhance the feeling of use. The content of component (C) in 100% by mass of the above cosmetic composition may be 0% by mass (not contained). From the viewpoint of improving the stability of the above cosmetic composition, the content of component (C) in 100% by mass of the above cosmetic composition may be 1.0% by mass or more, or 3.0% by mass or more.

[0069] <Ingredient (D)> Component (D) is a nonionic surfactant. By using component (D), the above cosmetic composition can be made into an emulsified cosmetic composition, and its emulsification stability can be improved. Component (D) may be used alone, or two or more may be used in combination.

[0070] Component (D) includes glycerin fatty acid esters (monoglycerin fatty acid esters), polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, (poly)oxyalkylene fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyalkylene alkyl ethers, polyoxyethylene hydrogenated castor oil, polyoxyethylene castor oil, polyoxyethylene lanolin, polyoxyalkylene alkylphenols, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkylphenyl formaldehyde condensates, polyoxyethylene sterols and their derivatives, polyoxyethylene beeswax derivatives, and sugar esters.

[0071] Examples of the above-mentioned glycerin fatty acid esters (monoglycerin fatty acid esters) include glyceryl monocaprylate, glyceryl monocaprate, glyceryl monolaurate, glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl monoisostearate, glyceryl monobehenate, glyceryl monooleate, glyceryl monoerucate, glyceryl sesquioleate, glyceryl distearate, glyceryl diisostearate, and glyceryl diarachinate.

[0072] Examples of the above polyglycerin fatty acid esters include polyglycerin fatty acid esters with a degree of polymerization of 2 to 10, such as diglyceryl monocaprylate, decaglyceryl monocaprylate, hexaglyceryl monocaprate, tetraglyceryl monolaurate, hexaglyceryl monolaurate, decaglyceryl monolaurate, poly(4-10)glyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, poly(2-10)glyceryl monostearate, diglyceryl monooleate, hexaglyceryl monooleate, diglyceryl sesquioleate, poly(2-10)glyceryl diisostearate, poly(6-10)glyceryl distearate, diglyceryl triisostearate, and poly(10)glyceryl tristearate.

[0073] Examples of the polyoxyethylene glycerol fatty acid esters mentioned above include polyoxyethylene glyceryl monostearate, polyoxyethylene glyceryl monoisostearate, and polyoxyethylene glyceryl monooleate.

[0074] Examples of the above (poly)oxyalkylene fatty acid esters include polyethylene glycol fatty acid esters such as polyethylene glycol monooleate, polyethylene glycol monostearate, polyethylene glycol distearate, and polyethylene glycol monolaurate; and propylene glycol fatty acid esters such as propylene glycol monostearate, propylene glycol monolaurate, and propylene glycol monooleate.

[0075] Examples of the above-mentioned sorbitan fatty acid esters include sorbitan monooleate, sorbitan monostearate, sorbitan monoisostearate, sorbitan monopalmitate, sorbitan monolaurate, sorbitan trioleate, sorbitan tristearate, sorbitan sesquioleate, sorbitan sesquiisostearate, and sorbitan coconut oil fatty acid.

[0076] Examples of the above-mentioned polyoxyethylene sorbitan fatty acid esters include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monoisostearate, polyoxyethylene sorbitan monococonut oil fatty acid, polyoxyethylene sorbitan tristearate, and polyoxyethylene sorbitan trioleate.

[0077] Examples of the above-mentioned polyoxyalkylene alkyl ethers include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxypropylene cetyl ether, polyoxypropylene isocetyl ether, polyoxypropylene stearyl ether, and polyoxypropylene oleyl ether.

[0078] From the viewpoint of further improving emulsification stability, it is preferable that component (D) contains a nonionic surfactant (at least one nonionic surfactant) selected from the group consisting of polyglycerol fatty acid esters having an average number of moles of glycerol added of 4 or more and 12 or less, and polyoxyethylene glycerol fatty acid esters having an average number of moles of oxyethylene added of 4 or more and 12 or less.

[0079] In the following explanation, the "polyglycerin fatty acid ester having an average number of added moles of glycerin of 4 or more and 12 or less" may be referred to as "component (D1)," and the "polyoxyethylene glycerin fatty acid ester having an average number of added moles of oxyethylene of 4 or more and 12 or less" may be referred to as "component (D2)."

[0080] Therefore, component (D) preferably contains a nonionic surfactant selected from the group consisting of component (D1) and component (D2). The above cosmetic composition preferably contains a nonionic surfactant selected from the group consisting of component (D1) and component (D2).

[0081] Component (D) may preferably contain component (D1), may preferably contain component (D2), and may preferably contain both component (D1) and component (D2).

[0082] Examples of components (D1) include polyglyceryl laurate and polyglyceryl myristate.

[0083] Component (D1) preferably contains a polyglycerin fatty acid ester (at least one polyglycerin fatty acid ester) selected from the group consisting of polyglyceryl-10 laurate and polyglyceryl-10 myristate.

[0084] Examples of component (D2) include polyoxyethylene isostearate glyceryl and polyoxyethylene laurate glyceryl.

[0085] Component (D2) preferably contains a polyoxyethylene glycerin fatty acid ester (at least one polyoxyethylene glycerin fatty acid ester) selected from the group consisting of PEG-8 glyceryl isostearate and PEG-12 glyceryl laurate.

[0086] The average number of moles of glycerin added to component (D1) is 4 or more and 12 or less, preferably 5 or more, more preferably 6 or more, preferably 11 or less, and more preferably 10 or less. If the average number of moles of glycerin added is above the lower limit and below the upper limit, the emulsion stability can be further enhanced.

[0087] The average number of moles of oxyethylene added to component (D2) is 4 or more and 12 or less, preferably 5 or more, more preferably 6 or more, preferably 11 or less, and more preferably 10 or less. If the average number of moles of oxyethylene added is above the lower limit and below the upper limit, the emulsification stability can be further enhanced.

[0088] In 100% by mass of the above cosmetic composition, the content of component (D1) is preferably 1.0% by mass or more, more preferably 1.5% by mass or more, even more preferably 2.0% by mass or more, preferably 5.0% by mass or less, more preferably 4.5% by mass or less, and even more preferably 4.0% by mass or less. When the content of component (D1) is above the lower limit and below the upper limit, the emulsification stability can be further enhanced.

[0089] In 100% by mass of the above cosmetic composition, the content of component (D2) is preferably 1.0% by mass or more, more preferably 1.5% by mass or more, even more preferably 2.0% by mass or more, preferably 5.0% by mass or less, more preferably 4.5% by mass or less, and even more preferably 4.0% by mass or less. When the content of component (D2) is above the lower limit and below the upper limit, the emulsification stability can be further enhanced.

[0090] In 100% by mass of the above cosmetic composition, the content of component (D) is preferably 1.0% by mass or more, more preferably 1.5% by mass or more, even more preferably 2.0% by mass or more, preferably 5.0% by mass or less, more preferably 4.5% by mass or less, and even more preferably 4.0% by mass or less. When the content of component (D) is above the lower limit and below the upper limit, the emulsification stability can be further enhanced.

[0091] <Other ingredients> The above cosmetic composition may contain other components besides components (A) to (D) described above. Examples of these other components include oils other than component (A), anionic surfactants, cationic surfactants, amphoteric surfactants, lower alcohols, cooling agents, pH adjusters, preservatives, antioxidants, chelating agents (such as EDTA), vitamins, plant and animal extracts, pearlescent agents, bactericides, UV absorbers, clay minerals, powders, colorants, and fragrances. Each of these other components may be used individually or in combination of two or more.

[0092] <Further details on cosmetic composition> The preferred viscosity configuration of the above cosmetic composition at 25°C is the same as that of the above-described composition at 25°C.

[0093] The configuration of the normal stress that the above cosmetic composition may have is the same as the configuration of the normal stress of the composition described above.

[0094] [Propellant] Conventional known propellants can be used as the above-mentioned propellants. Examples of such propellants include gases such as air, nitrogen, nitrous oxide, and carbon dioxide (especially compressed gases); and liquefied gases such as liquefied petroleum gas (LPG), dimethyl ether (DME), isopentane, fluorocarbon, and trans-1,3,3,3-tetrafluoropropene (HFO-1234ze-(E), etc.). Only one of the above-mentioned propellants may be used, or two or more may be used in combination.

[0095] From the viewpoint of discharge stability, the propellant is preferably a propellant selected from the group consisting of nitrogen and carbon dioxide (at least one propellant).

[0096] The amount of the propellant in the total 100% by mass of the above composition and the above propellant is not particularly limited as it varies depending on the form of the aerosol container, etc. The amount of the propellant in the total 100% by mass of the above composition and the above propellant may be 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 70.0% by mass or less, 60.0% by mass or less, or 50.0% by mass or less.

[0097] When using an aerosol container comprising an outer container and an inner container (for example, in the case of a bag-on-valve type aerosol product), the content of the propellant in the total 100% by mass of the composition and the propellant is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, preferably 10.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 3.0% by mass or less. When the content of the propellant is above the lower limit and below the upper limit, the discharge performance becomes even better.

[0098] In the case of a typical aerosol product in which a composition and a propellant are filled into a single aerosol container, the content of the propellant in the total 100% by mass of the composition and the propellant is preferably 2.0% by mass or more, more preferably 3.0% by mass or more, even more preferably 4.0% by mass or more, preferably 70.0% by mass or less, more preferably 60.0% by mass or less, and even more preferably 50.0% by mass or less. When the content of the propellant is above the lower limit and below the upper limit, the discharge performance becomes even better.

[0099] [Aerosol products for showers] The aerosol product of the present invention comprises an aerosol container, the above-mentioned composition, and the above-mentioned propellant. The above-mentioned composition is filled inside the aerosol container. The above-mentioned propellant is filled inside the aerosol container.

[0100] In the above aerosol product, the above composition can be dispensed from the aerosol container. From the viewpoint of dispensing stability, it is preferable that the above aerosol product can dispense the above composition from the aerosol container in liquid or paste (cream) form. In the above aerosol product, the dispensed above composition is injected into the shower device.

[0101] The internal pressure of the above aerosol container (i.e., the pressure of the gas phase portion of the propellant inside the aerosol container) is preferably 0.30 MPa or higher, more preferably 0.50 MPa or higher, even more preferably 0.60 MPa or higher, preferably 0.95 MPa or lower, more preferably 0.90 MPa or lower, and even more preferably 0.80 MPa or lower at 25°C. In other words, in the above aerosol product, it is preferable that the propellant is filled inside the aerosol container so that the internal pressure at 25°C is 0.30 MPa or higher, more preferably 0.50 MPa or higher, even more preferably 0.60 MPa or higher, preferably 0.95 MPa or lower, even more preferably 0.90 MPa or lower, and even more preferably 0.80 MPa or lower. In this case, discharge stability can be improved.

[0102] Conventional aerosol containers can be used as the above-mentioned aerosol containers.

[0103] The above aerosol container may comprise an outer container and an inner container. In this case, it is preferable that the inner container is housed within the outer container. That is, the aerosol container may be a double-walled container comprising an outer container and an inner container. In this case, it is preferable that the composition is filled into the inner container and the propellant is filled into the space between the outer container and the inner container. In this case, the usability of the aerosol product can be further improved.

[0104] The inner container is preferably a bag (inner bag). Examples of the bag include a bag made of sheet material. The bag is preferably a pouch formed by laminating sheet material. The sheet material is preferably a flexible sheet material. Examples of the sheet material include resin sheets such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, etc.), and polyamide (nylon, etc.); metal sheets such as aluminum foil, and laminated sheets thereof. The sheet material may be provided with a vapor-deposited layer of metal (aluminum, etc.) or inorganic material (silica, aluminum oxide, etc.). The thickness of the sheet material is not particularly limited, but is preferably 5 μm or more and preferably 100 μm or less.

[0105] Examples of the outer containers mentioned above include aluminum cans, tin cans, and polyethylene terephthalate (PET) containers.

[0106] As an aerosol container comprising an outer container and an inner container in the form of a bag, the so-called bag-on-valve type aerosol container is known and is available commercially. The aerosol product comprising the above-mentioned bag-on-valve type aerosol container is a bag-on-valve type aerosol product. In other words, the above-mentioned aerosol product may be a bag-on-valve type aerosol product. When the aerosol product of the present invention is a bag-on-valve type aerosol product, it is preferable because when the composition is dispensed from the aerosol container, only the composition is dispensed without dispensing the propellant, and only the composition can be efficiently injected into the shower device. Furthermore, it is preferable because it has excellent dispensing properties even when the composition has high viscosity.

[0107] When the above aerosol container comprises an outer container and an inner container, the propellant is preferably filled in the space between the outer container and the inner container such that the internal pressure at 25°C is 0.30 MPa or more, more preferably 0.50 MPa or more, even more preferably 0.60 MPa or more, preferably 0.95 MPa or less, more preferably 0.90 MPa or less, and even more preferably 0.80 MPa or less. In this case, the discharge stability can be improved.

[0108] The amount of composition filled in the aerosol container is not particularly limited. The amount of composition filled in the aerosol container is preferably, for example, 100 mL or more, and preferably 200 mL or less. Alternatively, the amount of composition filled in the aerosol container is preferably, for example, 50 g or more, and preferably 300 g or less.

[0109] The above aerosol product can be manufactured by known methods. For example, a method for manufacturing the above aerosol product involves filling an aerosol container with the above composition or each of the components contained in the above composition, clinching the aerosol container with an aerosol valve, filling the propellant from the stem, and attaching an actuator suitable for the stem. For example, a method for manufacturing the above aerosol product of the bag-on-valve type involves filling an outer container with propellant and clinching it with a bag-on-valve, and then filling the inner container with the above composition or each of the components contained in the above composition from the stem (and, if necessary, further attaching an actuator suitable for the stem).

[0110] The method of using the above aerosol product preferably comprises the steps of: injecting the above composition into the shower device by dispensing the above composition from the aerosol container (step (1)); and dispensing a mixture of the above composition and water from the shower head of the shower device (step (2)).

[0111] In step (1) described above, the method of injecting the composition into the shower device is not particularly limited. However, as described above, it is preferable to inject the composition into the shower device from the injection mechanism (inlet) of the shower device. Typically, the discharge of the composition from the aerosol container and the injection of the discharged composition into the shower device occur almost simultaneously (for example, within 5 seconds).

[0112] After step (1) above, the composition comes into contact with water (water present in the shower device) inside the shower device, and the composition and water are mixed. In step (2) above, the mixture of the composition and water is discharged from the shower head of the shower device. The discharged mixture can be brought into contact with an object (for example, the user's skin) to produce the desired effect. [Examples]

[0113] The present invention will be described in detail below with reference to examples. The present invention is not limited to the following examples.

[0114] The following components were used in the examples.

[0115] (Component (A)) Mineral oil (KAYDOL, manufactured by Sonneborn Inc.) Squalane

[0116] (Component (B)) Glycerin Dipropylene glycol 1,3-BG:1,3-Butylene glycol PEG-6 PEG-32 PEG-400

[0117] (Component (C)) purified water

[0118] (Component (D)) Polyglyceryl-10 myristate PEG-8 Glyceryl Isostearate

[0119] (others) Isopropyl myristate Glyceryl (ethylhexanoate / stearic acid / adipate) fragrance Phenoxyethanol Laurylbetaine Sodium laureth sulfate ethanol menthol Isopropylmethylphenol Ethylhexyl palmitate

[0120] (propellant) Nitrogen gas Liquefied petroleum gas (LPG)

[0121] (Examples 1-10, 12-30) Cosmetic compositions having the compositions shown in Tables 1 to 6 below were prepared by blending the ingredients shown in Tables 1 to 6 below (the blending unit is mass%). The propellant was filled into the outer container, and after clinching with a bag-on valve (a valve to which an inner container (bag) is attached), the obtained composition was filled into the inner container from the stem to produce an aerosol product (a bag-on valve type aerosol product). Note that the blending amounts in the tables (amount blended in 100% mass of the cosmetic composition) are shown as the amount blended in pure components (unit: mass%). The propellant was filled into the space between the outer container and the inner container (bag) so that the internal pressure at 25°C was the pressure shown in Tables 1 to 6 below.

[0122] (Example 11) A cosmetic composition having the composition shown in Table 2 below was prepared. The obtained cosmetic composition was filled into an aerosol container. Next, the aerosol valve was clinched into the aerosol spray container, and the propellant was filled from the stem to produce an aerosol product (a general aerosol product, not a bag-on-valve type).

[0123] The cosmetic compositions prepared in Examples 1-28 are skincare compositions. The cosmetic composition prepared in Example 29 is a cleansing composition. The cosmetic composition prepared in Example 30 is a cooling deodorant composition.

[0124] (evaluation) The resulting aerosol product could dispense the cosmetic composition from the aerosol container whether it was upright or inverted. The resulting aerosol product was easy for the user to operate, and the cosmetic composition could only be dispensed from the aerosol container while the stem was pressed down (for example, while the spray button was pressed). Therefore, the resulting aerosol product offered excellent usability. Furthermore, since the desired amount of composition could be injected into the shower device only at the time of use, the resulting aerosol product offered superior hygiene.

[0125] Furthermore, the following evaluations were performed on the obtained aerosol products.

[0126] (Test Example 1: Viscosity of cosmetic composition at 25°C) The viscosity of the obtained cosmetic composition at 25°C was measured using a Type B viscometer (TV-25 viscometer manufactured by Toki Sangyo Co., Ltd.) with a No. 3 rotor at a rotation speed of 6 rpm and a rotation time of 1 minute.

[0127] (Test Example 2: Normal stress of cosmetic composition at 25°C) In the test described in Test Example 1 above, for cosmetic compositions whose viscosity at 25°C exceeded 100,000 mPa·s, the normal stress of the cosmetic composition at 25°C was measured using a rheometer CR-500DX manufactured by Sun Science Co., Ltd., in accordance with the <Method for Measuring Normal Stress> described above.

[0128] (Test example 3: Compatibility with hot and cold water) Ten mL of the obtained cosmetic composition was added to 2 L of 40°C hot water in a beaker, and the cosmetic composition and hot water were stirred with a stirring rod. The state of the stirred mixture was visually observed and evaluated according to the following criteria.

[0129] <Evaluation criteria for compatibility with hot and cold water> S (particularly excellent): With stirring five times or less, the cosmetic composition easily blends with hot water, and the mixture of the cosmetic composition and hot water becomes cloudy. A (Excellent): With stirring 6 to 10 times, the cosmetic composition easily blends with hot water, and the mixture of the cosmetic composition and hot water becomes cloudy. B (Inferior): After 10 stirrings, the cosmetic composition does not easily blend with the water, and the mixture of the cosmetic composition and the water does not become cloudy.

[0130] Furthermore, all cosmetic compositions that received a "B" rating in the above evaluation were able to dissolve in hot water with 20 or fewer stirs and were perfectly usable when injected into shower equipment.

[0131] (Test Example 4-1: Examples 1-28: User Experience (1)) A mixture prepared by diluting 10 mL of the obtained cosmetic composition in 2 L of 40°C water was dispensed using a commercially available suction shower and flowed over the inner part of the subject's upper arm for 10 seconds. Immediately afterward, the inner part of the upper arm was towel-dried. Then, the subject's skin texture was evaluated by touch. Compared to the case without the cosmetic composition (simply flowing 40°C warm water under the same conditions), the subject was evaluated on whether they felt their skin was "moisturized" or not, and answered either "my skin feels moisturized" or "my skin does not feel moisturized." The evaluation was conducted by three subjects (professional evaluators).

[0132] (Test Example 4-2: Examples 1-28: User Experience (2)) The test was conducted using a shower device equipped with a shower head that had an inlet leading to the flow path of the shower head. The obtained aerosol product was connected to the inlet, and 10 mL of the cosmetic composition was dispensed from the aerosol product and injected into the flow path of the shower head. Next, 40°C hot water was passed through the shower device at a flow rate of approximately 4000 mL / min and discharged from the shower head, and the water was poured over the inner part of the subject's upper arm for 30 seconds. Immediately afterward, the inner part of the upper arm was towel-dried. After that, the feel of the inner part of the upper arm was evaluated by touch. Compared to when the cosmetic composition was not injected (simply 40°C hot water was poured under the same conditions), it was evaluated whether the subject felt that their skin was "moisturized," and the response was either "I feel my skin is moisturized" or "I do not feel my skin is moisturized." The evaluation was conducted by three subjects (professional evaluators).

[0133] <Evaluation criteria for user experience (1) and (2)> S: All 3 subjects responded that they felt their skin was moisturized. A: Two out of three subjects answered that they felt their skin was moisturized. B: One out of three subjects answered that they felt their skin was moisturized. C: Zero out of three subjects reported feeling that their skin was moisturized.

[0134] (Test Example 4-3: Example 29: User Experience (3)) The test was conducted in the same manner as in Test Example 4-1, except that the subjects evaluated whether they felt their skin was refreshed, and that the three subjects (expert evaluators) answered either "my skin felt refreshed" or "my skin did not feel refreshed."

[0135] (Test Example 4-4: Example 29: User Experience (4)) The test was conducted in the same manner as in Test Example 4-2, except that the subjects evaluated whether they felt their skin was refreshed, and the three subjects (expert evaluators) answered either "my skin felt refreshed" or "my skin did not feel refreshed."

[0136] <Evaluation criteria for user experience (3) and (4)> A: Two or more out of three subjects answered that they felt their skin was refreshed. B: One out of three subjects answered that they felt their skin was refreshed. C: Zero out of three subjects reported feeling refreshed on their skin.

[0137] (Test Example 4-5: Example 30: User Experience (5)) The test was conducted in the same manner as in Test Example 4-1, except that the evaluation focused on whether or not a "cooling sensation" was felt, and that the three subjects (expert evaluators) responded with either "felt a cooling sensation" or "did not feel a cooling sensation."

[0138] (Test Example 4-6: Example 30: User Experience (6)) The test was conducted in the same manner as in Test Example 4-2, except that the evaluation focused on whether or not a "cooling sensation" was felt, and that the three subjects (expert evaluators) responded with either "felt a cooling sensation" or "did not feel a cooling sensation."

[0139] <Evaluation criteria for user experience (5) and (6)> A: Two or more out of three subjects answered that they "felt a refreshing sensation." B: One out of three subjects answered that they felt a sense of coolness. C: Zero out of three subjects answered that they felt a sense of coolness.

[0140] (Test Example 5: Stability of Cosmetic Compositions) In each example, three aerosol products were prepared. The first aerosol product was stored at 5°C for one week. The second aerosol product was stored at 25°C for one week. The third aerosol product was stored at 40°C for one week. After storage, the properties of the cosmetic composition dispensed from the aerosol container were visually inspected. The cosmetic composition stored at 25°C for one week was designated "STD," the cosmetic composition stored at 5°C for one week was designated "Subject 1," and the cosmetic composition stored at 40°C for one week was designated "Subject 2." The differences in properties between STD and Subjects 1 and 2 were then examined.

[0141] <Evaluation Criteria for the Stability of Cosmetic Compositions> A: There is no difference in properties between STD and subjects 1 and 2. There are slight differences in properties between B:STD and subjects 1 and 2 (either one or both). There is a clear difference in characteristics between C:STD and subjects 1 and 2 (either one or both).

[0142] The composition and results are shown in Tables 1-6 below.

[0143] [Table 1]

[0144] [Table 2]

[0145] [Table 3]

[0146] [Table 4]

[0147] [Table 5]

[0148] [Table 6]

Claims

1. Aerosol container and The composition filled in the aerosol container, The aerosol container is filled with a propellant, A shower aerosol product used by dispensing the composition from the aerosol container and injecting the composition into a shower device.

2. The shower aerosol product according to claim 1, wherein the viscosity of the composition at 25°C is 5000 mPa·s or more.

3. The shower aerosol product according to claim 1 or 2, wherein the composition is a cosmetic composition.

4. The composition may or may not contain water. The shower aerosol product according to claim 1 or 2, wherein, when the composition contains water, the water content is 40.0% by mass or less of 100% by mass of the composition.

5. The shower aerosol product according to claim 1 or 2, wherein the internal pressure of the aerosol container is 0.30 MPa or more and 0.95 MPa or less at 25°C.

6. The aerosol container comprises an outer container and an inner container. The inner container is housed in the outer container. The composition is filled into the inner container, The shower aerosol product according to claim 1 or 2, wherein the propellant is filled in the space between the outer container and the inner container.

7. The shower aerosol product according to claim 6, wherein the propellant is filled into the space between the outer container and the inner container such that the internal pressure at 25°C is 0.30 MPa or more and 0.95 MPa or less.

8. The shower aerosol product according to claim 6, wherein the inner container is a bag.

9. A method of using the shower aerosol product according to claim 1 or 2, The process involves injecting the composition into the shower device by discharging the composition from the aerosol container, A method for using a shower aerosol product, comprising the steps of discharging a mixture of the composition and water from the shower head of the shower device.

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