JP2012236791A - Foaming aerosol composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foaming aerosol composition which forms a stereoscopic form immediately after discharging when discharging to a skin and thereafter, can obtain a touch sense of permeating to the skin by being deformed while self-generating a foaming sound.SOLUTION: The foaming aerosol composition contains an aqueous stock solution of a monohydric alcohol and/or dihydric alcohol and soluble compressed gas, wherein a saturated amount of dissolution of the soluble compressed gas relative to the aqueous stock solution is less than the saturated amount of dissolution relative to water.

Description

  The present invention relates to a foamable aerosol composition comprising a specific aqueous stock solution and a specific soluble compressed gas.

  Conventionally, a product containing an aqueous stock solution and a soluble compressed gas (carbon dioxide gas) and discharging a foam has been proposed. For example, Patent Document 1 discloses an aqueous facial cleansing cosmetic in the form of a foamed aerosol containing carbon dioxide, polyglycerin monofatty acid ester, and glycerin. Patent Document 2 discloses an after-foaming type post-foaming composition comprising an aqueous stock solution having a viscosity of 500 to 8000 cps at 20 ° C. and a compressed gas, and 200 to 5000 ppm of the compressed gas dissolved in the stock solution. Yes. Patent Document 3 discloses a foam cosmetic containing carbon dioxide gas and solid fat (hydrocarbon and / or fatty acid ester).

JP 2007-131585 A Japanese Patent No. 2776540 JP 2010-30945 A

  However, the aqueous facial cleanser described in Patent Document 1 contains a polyglycerin monofatty acid ester which is a surfactant as a foaming agent. The foamable composition described in Patent Document 2 contains a surfactant, a fatty acid, a higher alcohol, and the like, and increases the viscosity of the stock solution. Moreover, the foam cosmetics of patent document 3 contain solid fat. In other words, in these products, it is necessary to increase the viscosity of the surfactant or stock solution in order to discharge the contents in a foam with compressed gas. Yes, it does not defoam while making noises.

  The present invention provides a foamable aerosol composition that, when discharged onto the skin, forms a three-dimensional foam immediately after discharge, and then defoams while generating a sound with its own swoosh, thereby obtaining a touch that penetrates into the skin. The purpose is to provide.

  The foamable aerosol composition of the present invention comprises an aqueous stock solution containing monohydric and / or dihydric alcohol and a soluble compressed gas, and the saturated dissolved amount of the soluble compressed gas in the aqueous stock solution is saturated with water. The foamable aerosol composition is less than the amount dissolved.

  The monohydric alcohol is a monohydric alcohol having 2 to 3 carbon atoms, and the content in the aqueous stock solution is preferably 0.01 to 35% by mass.

  The dihydric alcohol is preferably a dihydric alcohol having 2 to 6 carbon atoms, and the content in the aqueous stock solution is preferably 0.01 to 60% by mass.

  The aqueous stock solution preferably contains at least one humectant selected from pyrrolidone carboxylate, hyaluronic acid, and hyaluronate.

  When the saturated vapor pressure at 25 ° C. is 0.7 MPa, the saturated dissolved amount of the soluble compressed gas in the aqueous stock solution is preferably 6,000 to 13,500 ppm.

  According to the foamable aerosol composition of the present invention, when ejected to the skin, a three-dimensional foam is formed immediately after ejection, and then the foam permeates with a swooshing sound, so that it feels like it has penetrated into the skin. The resulting foamable aerosol composition can be provided.

  The foamable aerosol composition of the present invention comprises an aqueous stock solution containing monohydric and / or dihydric alcohol and a soluble compressed gas, and the saturated dissolved amount of the soluble compressed gas in the aqueous stock solution is saturated with water. It is a foamable aerosol composition characterized in that it is less than the dissolved amount, and when discharged, the discharged material forms a three-dimensional foam immediately after discharge, and then defoams while making a swooshing sound, and then on the skin A feeling of soaking is obtained.

  The monohydric and / or dihydric alcohol is used to obtain a foaming property of the present invention by making the saturated dissolution amount of the soluble compressed gas in the aqueous stock solution smaller than the saturated dissolution amount in water.

  Examples of the monohydric alcohol include monohydric alcohols having 2 to 3 carbon atoms such as ethanol, isopropanol, and propanol. By containing a monohydric alcohol having 2 to 3 carbon atoms, sterilization and disinfection effects can be obtained.

  Examples of the dihydric alcohol include dihydric alcohols having 2 to 6 carbon atoms such as propylene glycol, 1,3-butylene glycol, and hexylene glycol. A moisturizing effect can be obtained by containing a dihydric alcohol having 2 to 6 carbon atoms.

  The content of the monohydric and / or dihydric alcohol in the aqueous stock solution is within a range in which the saturated dissolved amount of the soluble compressed gas is less than that of water.

  When the monohydric alcohol is used, the content in the aqueous stock solution is preferably 0.01 to 35% by mass, more preferably 0.05 to 30% by mass, and 0.1 to 25% by mass. More preferably. When the content of the monohydric alcohol is less than 0.01% by mass, the effect of reducing the saturated dissolution amount to less than that of water cannot be obtained, and the foamability of the present invention tends not to be obtained. On the other hand, when the amount is more than 35% by mass, the saturated dissolution amount is larger than that of water, and the foamability of the present invention tends to be not obtained.

  The content in the case of using the dihydric alcohol is preferably 0.01 to 60% by mass in the aqueous stock solution, more preferably 0.05 to 50% by mass, and 0.1 to 45% by mass. More preferably it is. When the content of the dihydric alcohol is less than 0.01% by mass, the effect of reducing the saturated dissolution amount to less than that of water cannot be obtained, and the foamability of the present invention tends not to be obtained. Moreover, when more than 60 mass%, there exists a tendency for the amount of saturated dissolution to increase more than water, and to become unable to obtain the foamability of this invention.

  The aqueous stock solution contains, in addition to the monohydric and / or dihydric alcohol, a moisturizer, a water-soluble polymer, an active ingredient, a surfactant, an oil, and the like as appropriate depending on the purpose and use of the product. be able to.

  The humectant can be used not only for the effect as a humectant, but also for the purpose of acting as a foaming auxiliary component that improves foaming and antifoaming properties. Furthermore, by including in the aqueous concentrate of the present invention, the physical action of the present invention of defoaming while emitting noise on the discharge surface (skin) improves the permeability to the skin and improves the moisturizing effect. Can be made.

  Examples of the humectant include pyrrolidone carboxylates such as sodium pyrrolidonecarboxylate, hyaluronic acid such as hydrolyzed hyaluronic acid and salts thereof, and the like. As the hydrolyzed hyaluronic acid, when the molecular weight is greater than 10,000, the effect of assisting the foaming and defoaming properties of the present invention tends to be difficult to obtain, so hydrolyzed hyaluronic having a molecular weight of 10,000 or less. An acid is preferred.

  These moisturizing components can be used alone or in combination of two or more. In particular, it is preferable to use pyrrolidone carboxylate and hydrolyzed hyaluronic acid in combination, because a foam that defoams while generating sound is easily obtained.

  The content when the humectant is used is preferably 0.001 to 5 mass% in the aqueous stock solution, and more preferably 0.005 to 3 mass%. When the content of the humectant is less than 0.001% by mass, the foamability of the discharged product tends to be insufficient. Moreover, when more than 5 mass%, there exists a tendency for the viscosity of an aqueous | water-based undiluted solution to become high, and to become easy to defoam, generating a swoosh and sound.

  The water-soluble polymer can be used for the purpose of improving the sustainability of the foam. Examples of the water-soluble polymer include cellulosic polymers such as hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methyl cellulose; gums such as xanthan gum, carrageenan, gum arabic, tragacanth gum, guar gum, gellan gum, locust bean gum; More than 100,000 hyaluronic acid and salts thereof, carboxyvinyl polymer, dextran, dextrin, pectin, starch, corn starch, wheat starch, alginic acid, saponin, modified potato starch, etc., these may be used alone or in combination of two or more Can also be used in combination.

  The content in the case of using the water-soluble polymer is preferably 0.01 to 3% by mass in the aqueous stock solution, and more preferably 0.05 to 1% by mass. When the content of the water-soluble polymer is less than 0.01% by mass, the foam sustaining effect tends to be difficult to obtain. On the other hand, if it exceeds 3% by mass, the viscosity of the aqueous stock solution tends to be high, and it tends to be difficult to defoam while generating a swooshing sound.

  The active ingredient can be appropriately selected and used depending on the use or purpose of the product. Examples of the active ingredient include preservatives such as paraoxybenzoate such as methyl paraoxybenzoate, ethyl paraoxybenzoate, and propyl paraoxybenzoate, and phenoxyethanol; pH adjusters such as citric acid, sodium citrate, and calcium citrate Vitamins such as l-menthol and camphor, dl-α-tocopherol, etc .; Dokudami extract, Plum extract, Merylolo extract, Licorice extract, Peonies extract, Loofah extract, Kina extract, Clara extract, Primrose extract, Rose extract, Lemon Extracts such as extract, aloe extract, ginger root extract, eucalyptus extract, sage extract, tea extract, seaweed extract, placenta extract and silk extract; and flavors such as synthetic flavors and natural flavors.

  When the active ingredient is contained, the content in the aqueous stock solution is preferably 0.01 to 20% by mass, and more preferably 0.1 to 10% by mass. When the content of the active ingredient is less than 0.01% by mass, the effect of the active ingredient tends to be difficult to obtain. Moreover, when more than 20 mass%, there exists a tendency for foamability and defoaming property to fall easily.

  The surfactant can be used for the purpose of adjusting the foaming property and defoaming property of the discharged product, emulsifying with an oil component described later, and making it into an emulsion. Examples of the surfactant include polyethylene glycol fatty acid ester, polyoxyethylene castor oil / hardened castor oil, sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester. , Nonionic surfactants such as polyoxyethylene glycerin fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene lanolin, lanolin alcohol, beeswax derivative; N-coconut oil fatty acid acyl-L -Amino acid surfactants such as triethanolamine glutamate and N-coconut oil fatty acid acyl-sodium L-glutamate; polyoxyethylene Examples include silicone surfactants such as chilled polysiloxane copolymers, polyoxypropylene / methylpolysiloxane copolymers, and poly (oxyethylene / oxypropylene) / methylpolysiloxane copolymers, which are used alone. It is also possible to use a combination of two or more.

  When the surfactant is contained, the content in the aqueous stock solution is preferably 0.01 to 10% by mass, and more preferably 0.1 to 5% by mass. When the content of the surfactant is less than 0.01% by mass, the effect of the surfactant tends to be difficult to obtain. On the other hand, when the amount is more than 10% by mass, the feeling of use tends to be lowered, for example, stickiness or irritation tends to remain on the application surface such as the skin.

  The oil can be used for the purpose of imparting gloss or luster to the skin and hair, improving the touch, and enhancing the moisturizing effect. Examples of the liquid oil include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, cetyl lactate, isocetyl stearate, isocetyl isostearate, diisobutyl adipate, di-2-ethylhexyl sebacate, myristic acid Hydrocarbon oils such as ester oils such as 2-hexyldecyl, 2-hexyldecyl adipate, diethoxyethyl succinate, diisostearyl malate, liquid paraffin, liquid isoparaffin, squalane, squalene, mineral oil; octamethyl Cyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, tetrahydrotetramethylcyclotetrasiloxane, octame Silicone oil such as rutrisiloxane, decamethyltetrasiloxane, methylpolysiloxane, methylphenylpolysiloxane; avocado oil, camellia oil, corn oil, mink oil, olive oil, rapeseed oil, sesame oil, castor oil, linseed oil, safflower oil, Examples include vegetable oils such as jojoba oil, palm oil, palm oil, soybean oil, cottonseed oil, and peanut oil, and these can be used alone or in combination of two or more.

  The aqueous stock solution can be prepared by adding monohydric and / or dihydric alcohol, the moisturizing component and the like to water to obtain a specific viscosity. The water is used as a solvent, and examples thereof include purified water and ion exchange water.

  The viscosity of the aqueous stock solution is preferably 2 to 300 cps. When the viscosity of the aqueous stock solution is smaller than 2 cps, the foaming property tends to be poor, and when it is larger than 300 cps, it tends to be sticky and the feeling of use tends to be poor.

  The water content is preferably 35 to 99.9% by mass in the aqueous stock solution, and more preferably 45 to 99.8% by mass. When the water content is less than 35% by mass, the foamability tends to decrease. Moreover, when it exceeds 99.9 mass%, there exists a tendency for content of monohydric and / or dihydric alcohol, a moisturizing component, an active ingredient, etc. to decrease, and to obtain the effect of this invention easily.

  The foamable aerosol composition of the present invention can be prepared by filling the aqueous stock solution in a pressure resistant container, sealing the valve to the pressure resistant container and sealing it, and filling the compressed compressed gas from the valve. The soluble compressed gas may be filled by undercup filling before the valve is fixed.

  The soluble compressed gas acts as a propellant in the pressure vessel and further partly dissolves in the aqueous stock solution. When the dissolved compressed gas is discharged into the atmosphere, it volatilizes from the aqueous stock solution to foam the discharge.

  Examples of the soluble compressed gas include carbon dioxide (Ostwald coefficient: 0.759), nitrous oxide gas (Ostwald coefficient: 0.059), oxygen gas (Ostwald coefficient: 0.028), and a mixed gas thereof. The Ostwald coefficient with respect to water at 25 ° C. is 0.02 or more, preferably 0.05 or more. When the Ostwald coefficient is lower than 0.02, the amount of dissolution in the aqueous stock solution is reduced, resulting in poor foamability.

  The soluble compressed gas is preferably filled so that the pressure of the aerosol composition is 0.2 to 1.0 MPa at 25 ° C., more preferably 0.3 to 0.8 MPa. . When the pressure is lower than 0.2 MPa, the foaming property tends to deteriorate because the amount of dissolution is small. On the other hand, when it is higher than 1.0 MPa, the momentum at the time of discharge is strong, and it tends to be scattered easily.

  The foamable aerosol composition of the present invention uses an aqueous stock solution containing a specific amount of monohydric and / or dihydric alcohol, and is adjusted to a specific pressure using a soluble compressed gas having a specific solubility. Can do.

  The foamable aerosol composition of the present invention preferably has a saturated dissolution amount in an aqueous stock solution of the soluble compressed gas of 6,000 to 13,500 ppm when the saturated vapor pressure is 0.7 MPa (25 ° C.), More preferably, it is 7,000 to 13,000 ppm. When the saturated dissolution amount of the soluble compressed gas is less than 6,000 ppm, the foaming property is weak, and it tends to be difficult to remove bubbles with a swooshing noise. Moreover, when it exceeds 13,500 ppm, it tends to foam but defoaming becomes faster.

An example of a method for calculating the saturated dissolution amount will be described. For example, a soluble compressed gas is pressurized to an equilibrium pressure P in an aerosol container filled with an aqueous stock solution, and the filling amount (mass) of the filled soluble compressed gas is A. The molecular weight of the soluble compressed gas is M, the volume of the gas phase in the aerosol container is V, the gas constant is R, the temperature is T, and the soluble compressed gas A _{g in the} gas phase immediately after filling according to equation (1). The mass of is calculated.
P ・ V = A _g / M ・ R ・ T (1)
Then, to calculate the mass A _L solubility compressed gas in the aqueous stock solution (2) below.
A−A _g = A _L (2)
When the filling amount (volume) of the aqueous stock solution is L, the saturated dissolution amount X of the soluble compressed gas in the aqueous stock solution can be obtained by the equation (3).
A _L / L = X (3)

  The foamable aerosol composition of the present invention contains monohydric and / or dihydric alcohols, and uses an aqueous stock solution and a soluble compressed gas in which the saturated dissolved amount of the soluble compressed gas is smaller than that of water. Immediately after discharge, a three-dimensional foam is formed, and then defoamed while making a sound. As a result, it is possible to obtain a feeling that the foam soaks when discharged onto the skin. Therefore, the foam can be suitably used for skin products such as moisturizing lotions, anti-aging agents, and massage agents. In addition, when more than the saturated dissolution amount with respect to water, the foamability of this invention will no longer be obtained.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these.

  The evaluation method is shown below.

1) Dissolved amount of carbon dioxide gas (dissolvable compressed gas) 184 ml of aqueous stock solution was filled into an aluminum pressure vessel (full amount 310 ml), an aerosol valve was attached to this pressure vessel, and carbon dioxide was filled from the valve. And the density | concentration of the carbon dioxide dissolved in the aqueous | water-based stock solution was computed from the above-mentioned Formula (1), (2), (3) from the filling amount of the carbon dioxide which will become 0.7 Mpa in an equilibrium pressure at 25 degreeC.

2) Foamability The pressure-resistant container was immersed in a constant temperature water bath at 25 ° C. for 1 hour, the aerosol composition was discharged, and the foamability of the discharged material was evaluated.
○: A three-dimensional form is formed.
Δ: Forms foam but immediately defoams.
X: Liquid with almost no foam.

3) Antifoaming property The defoaming state of the discharge thing after the said foamability evaluation was evaluated.
A: Defoaming so that it can be played while making a sound.
○: Defoaming with a swooshing sound.
X: No sound is emitted.

Examples 1-21 and Comparative Examples 1-10
Aqueous stock solutions shown in Tables 1 to 6 were prepared, and after filling 184 ml of an aluminum pressure resistant container, an aerosol valve was attached to the pressure resistant container, and a test aerosol composition was manufactured by filling carbon dioxide gas from the valve. In addition, it filled with the carbon dioxide gas so that the pressure in the container in 25 degreeC might be set to 0.7 MPa. About the obtained aerosol composition for a test, the amount of carbon dioxide dissolved, foamability, and antifoaming property were evaluated. The results are shown in Table 7. Comparative Example 10 is a test aerosol composition containing only water as a stock solution, and is used to compare the amount of carbon dioxide dissolved in Examples 1-21 and Comparative Examples 1-9 with the amount dissolved in water. It was.

Formulation Examples 1-4
The aqueous stock solution shown in Table 8 was prepared, and after filling 184 ml of an aluminum pressure resistant container, an aerosol valve was attached to the pressure resistant container, and carbon dioxide gas was charged from the valve to produce an aerosol composition. In addition, it filled with the carbon dioxide gas so that the pressure in the container in 25 degreeC might be set to 0.7 MPa. About the obtained aerosol composition, the amount of carbon dioxide dissolved, foamability, and antifoaming property were evaluated. The results are shown in Table 9.

Claims (5)

An aqueous stock solution containing monohydric and / or dihydric alcohol and a soluble compressed gas,
A foamable aerosol composition having a saturated dissolution amount of the soluble compressed gas in the aqueous stock solution less than a saturated dissolution amount in water. The foamable aerosol composition according to claim 1, wherein the monohydric alcohol is a monohydric alcohol having 2 to 3 carbon atoms, and the content in the aqueous stock solution is 0.01 to 35 mass%. The foamable aerosol composition according to claim 1, wherein the dihydric alcohol is a dihydric alcohol having 2 to 6 carbon atoms and 0.01 to 60% by mass in an aqueous stock solution. The foamable aerosol composition according to claim 1, wherein the aqueous stock solution contains at least one humectant selected from pyrrolidone carboxylate, hyaluronic acid, and hyaluronate. The foamable aerosol composition according to claim 1, wherein when the saturated vapor pressure at 25 ° C is 0.7 MPa, the saturated dissolution amount of the soluble compressed gas in the aqueous stock solution is 6,000 to 13,500 ppm.