JP2014129307A - Aerosol cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol cosmetic capable of efficiently dissolving a propellant by controlling the viscosity of a stock solution to be low and having a high viscosity of foams discharged.SOLUTION: There is provided an aerosol cosmetic obtained by filling a stock solution, which comprises the following components (A), (B), (C) and (D): (A) 0.01 to 10 mass% of an amino acid-based surfactant, (B) a nonionic surfactant having two or more of at least one or two or more groups selected from (B1) a polyoxyethylene group and (B2) an alkyl group and an alkenyl group, (C) 0.01 to 3 mass% of a (meth)acrylic acid-based polymer and (D) water and in which the mass ratio (A)/(B) between the components (A) and (B) is 7 or less, and (E) a propellant filled in a pressure container.

Description

  The present invention relates to an aerosol cosmetic.

Since carbon dioxide promotes blood circulation when acting on the skin, various carbon dioxide-containing cosmetics have been studied. For example, aerosol foams have been proposed as those capable of simply and effectively applying carbon dioxide (Patent Document 1, Patent Document 2, and Patent Document 3).
In order to improve the massaging properties of the aerosol foam, it is necessary to discharge foam that has a high foam viscosity and is not easily crushed. For this purpose, there are known methods such as a) increasing the viscosity of the stock solution, b) increasing the specific volume of bubbles, and c) stabilizing the foam film.

  Therefore, in the aerosol foam agent of carbon dioxide, carbon dioxide is a compressed gas, and in order to increase the dissolved volume of carbon dioxide and increase the specific volume of bubbles, even if an attempt is made to increase the carbon dioxide filling amount, carbon dioxide Since liquefied gas is not liquefied unlike liquefied gas, the filling amount is limited from the standpoint of pressure resistance and safety of the can, and the amount of carbon dioxide is limited. For this reason, in order to stabilize a foam and to make it a foam which is hard to be crushed, it is necessary to strengthen a foam film or to make the stock solution highly viscous.

  As an aerosol foam agent blended with carbon dioxide gas, a combination of an anionic surfactant and an example using N-acylamino acids have been proposed (Patent Documents 1 and 2). Moreover, in order to improve the stability of foam and liquid, a combination of N-acyl glutamate, a thickener and a fatty acid (Patent Document 4), an N-long chain acyl acidic amino acid and a specific thickener (Patent Document) 5) and a method for increasing the viscosity of a stock solution such as a cleaning solution using N-acylamino acids (Patent Document 6) has been proposed.

JP 2005-2046 A JP 2010-248098 A JP 2011-84490 A JP-A-6-1558089 JP 2006-348101 A JP 2012-97016 A

In an aerosol foam agent that uses carbon dioxide gas as a propellant, adding a water-soluble polymer to increase the viscosity of the stock solution makes it difficult for the carbon dioxide gas to dissolve in the stock solution in the aerosol foam agent during the filling process of carbon dioxide gas as the propellant. Immediately the pressure in the container increases. As a result, it becomes difficult to fill the required amount of carbon dioxide. For this reason, in order to fill the carbon dioxide, it is necessary to quickly dissolve the carbon dioxide in the stock solution to lower the pressure in the container. However, in reality, it took a long time to dissolve the carbon dioxide gas, and there was a problem in terms of productivity.
Moreover, when liquefied gas is used for a propellant, it is necessary to disperse | distribute liquefied gas to the stock solution in the aerosol foam agent by shaking of a container before use. However, when a water-soluble polymer is added to increase the viscosity of the stock solution, there is a problem that dispersibility is poor and it is difficult to obtain creamy bubbles at the time of ejection.

  The inventors of the present invention have provided an aerosol cosmetic that solves the above problems by using a combination of a specific nonionic surfactant in a system containing an amino acid surfactant and a (meth) acrylic acid polymer in an aerosol foam stock solution. It was found that it can be obtained.

The present invention includes the following components (A), (B), (C) and (D):
(A) Amino acid surfactant 0.01 to 10% by mass,
(B) (B1) a nonionic surfactant having two or more polyoxyethylene groups and (B2) at least one or two or more groups selected from alkyl groups and alkenyl groups,
(C) (meth) acrylic acid polymer 0.01-3 mass%,
(D) Aerosol formed by filling a pressure-resistant container with a stock solution containing water and having a mass ratio (A) / (B) of components (A) and (B) of 7 or less, and (E) a propellant. Regarding cosmetics.

  The aerosol cosmetic composition of the present invention can dissolve the propellant efficiently because the viscosity of the stock solution is suppressed low. Further, the discharged foam has a high foam viscosity, is fine and hard, and even when applied to the skin and massaged, the foam is difficult to collapse due to the share of massage, and the fine foam persists.

The amino acid surfactant of component (A) used in the present invention is a surfactant having an amino acid structure in the skeleton of the compound. Among amino acid surfactants, N-acyl amino acids in which the amino group is modified with an acyl group or salts thereof are preferred.
Examples of amino acid moieties in N-acyl amino acids or salts thereof include acidic amino acids such as glutamic acid and aspartic acid; Examples include neutral amino acids. Among these, from the viewpoint of stability under acidic conditions, acidic amino acids are preferable, glutamic acid and aspartic acid are more preferable, and glutamic acid is more preferable. These amino acid moieties may be D-form, L-form, or a mixture of D-form and L-form, but L-form is preferred.

  The acyl group preferably has a saturated or unsaturated linear or branched chain having 8 to 18 carbon atoms from the viewpoint of carbon dioxide retention, foam quality, foaminess, and low temperature stability. Examples of the acyl group include caproyl group, capryloyl group, caprinoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, isostearoyl group, oleoyl group, linoleoyl group, cocoyl group (coconut oil fatty acid acyl group), palm Examples include oil fatty acid acyl groups, palm kernel oil fatty acid acyl groups, beef tallow fatty acid acyl groups, straight chain and branched synthetic fatty acid acyl groups, and the like. Among these, an acyl group having 12 to 22 carbon atoms is preferable, and an acyl group having 12 to 18 carbon atoms is more preferable from the viewpoints of carbon dioxide retention, foam quality, foaminess, and stability. Specifically, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, and cocoyl group are preferable.

  The N-acylamino acid or a salt thereof may be used in the form of an acid, a salt thereof, or a part of the salt. Examples of these salts include inorganic salts such as alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium; organic amine salts such as ammonia, monoethanolamine, diethanolamine, and triethanolamine salts, arginine, Organic salts such as basic amino acid salts such as lysine, histidine, ornithine and the like can be mentioned. From the viewpoints of stability and solubility, alkali metal salts, organic amine salts, and basic amino acid salts are preferable. From the viewpoint of stability such as difficulty in coloring over time, sodium salts and potassium salts are more preferable.

  Therefore, N-acylamino acids or salts thereof include N-acyl glutamic acid having an acyl group having 12 to 18 carbon atoms, sodium salt or potassium salt thereof, and N-acyl aspartic acid having an acyl group having 12 to 18 carbon atoms. And its sodium salt or potassium salt is preferable. From the viewpoint of carbon dioxide retention, foam quality, foaminess, and low-temperature stability, N-acyl glutamic acid having an acyl group having 12 to 18 carbon atoms and sodium salt or potassium thereof. A salt is more preferred.

  Specific examples of component (A) include N-capryloyl glutamic acid, N-2-ethylhexanoyl glutamic acid, N-lauroyl glutamic acid, N-myristoyl glutamic acid, N-palmitoyl glutamic acid, N-stearoyl glutamic acid, N-cocoyl glutamic acid, N-palm oil fatty acid acyl glutamic acid, N-tallow fatty acid acyl glutamic acid, N-lauroyl aspartic acid, N-cocoyl aspartic acid, N-myristoyl aspartic acid, N-palmitoyl aspartic acid, N-stearoyl aspartic acid, N-cocoyl alanine, N-lauroylmethylalanine, N-myristoylmethylalanine, N-cocoylmethylalanine, N-lauroylsarcosine, N-myristoylsarcosine, N-cocoylsarcosine, etc. These sodium salts, potassium salts, arginine salts, triethanolamine salts, and the like. Of these, N-cocoyl glutamic acid or a salt thereof is more preferable.

  The amino acid surfactant of component (A) can be used alone or in combination of two or more. The content of the component (A) is 0.01% by mass or more, preferably 0.1% by mass or more, and more preferably 0.5% by mass or more as a salt in the total amount of aerosol cosmetics from the viewpoint of foamability. More preferably, it is 10 mass% or less, 7 mass% or less is preferable, and 5 mass% or less is more preferable. Moreover, content of a component (A) is 0.01-10 mass% as a salt in aerosol cosmetics whole quantity, 0.1-7 mass% is preferable, and 0.5-5 mass% is more preferable. .

The nonionic surfactant of component (B) used in the present invention has two or more groups selected from (B1) polyoxyethylene groups and (B2) alkyl groups and alkenyl groups. It is.
(B1) The polyoxyethylene group preferably has 10 to 500 moles of ethylene oxide, more preferably 30 to 200.
Moreover, as (B2) alkyl group and alkenyl group, linear or branched C8-22 is preferable, and C12-20 is more preferable. Specific examples include lauryl group, myristyl group, cetyl group, palmitoyl group, stearyl group, oleyl group, octyldodecyl group, behenyl group, hexyldecyl group, isostearyl group and the like. Component (B) has at least one group selected from such alkyl groups and alkenyl groups, or two or more groups, preferably 2 to 6 groups.
The nonionic surfactant of component (B) has two or more hydrophobic groups in (B2), so that it is easier to orient at the gas-liquid interface and the interface is stable compared to nonionic surfactants having only one hydrophobic group. It is thought that it becomes easy to become. As a result, it is considered that when an aerosol container is filled with a propellant, particularly when a gas such as carbon dioxide gas is filled, the gas can be easily taken into the stock solution and the gas can be taken into the stock solution. On the other hand, it is considered that the foam discharged from the aerosol container is not easily crushed and the foam stability can be increased.

  As the nonionic surfactant of the component (B), polyoxyethylene fatty acid methylglucoside having 2 to 4 fatty acid residues having 8 to 22 carbon atoms, polyoxygen having 2 to 6 fatty acid residues having 8 to 22 carbon atoms Ethylene fatty acid sorbit, polyoxyethylene fatty acid sorbitan having 2 to 4 fatty acid residues having 8 to 22 carbon atoms, polyoxyethylene fatty acid ester having 2 fatty acid residues having 8 to 22 carbon atoms, fatty acid residue having 8 to 22 carbon atoms Polyoxyethylene fatty acid glyceryl having 2 to 3 groups, polyoxyethylene hydrogenated castor oil having 3 fatty acid residues having 8 to 22 carbon atoms, polyethylene glycol fatty acid ester having 2 fatty acid residues having 8 to 22 carbon atoms, carbon number One or more selected from polyoxyethylene fatty acid pentaerythrit having 4 to 22 fatty acid residues Is mentioned. Of these, polyoxyethylene fatty acid methyl glucoside having 2 to 4 fatty acid residues having 12 to 18 carbon atoms and 2 to 2 fatty acid residues having 12 to 18 carbon atoms in terms of fineness of foam texture at the time of ejection. 6 polyoxyethylene fatty acid sorbit, polyoxyethylene fatty acid sorbitan having 2 to 4 fatty acid residues having 12 to 18 carbon atoms are preferred, polyoxyethylene fatty acid methyl glucoside having 2 to 4 carbon atoms fatty acid residues, carbon More preferred are polyoxyethylene fatty acid sorbits having 2 to 6 fatty acid residues of number 18 and polyoxyethylene fatty acid sorbitans having 2 to 4 fatty acid residues of carbon number 18. Moreover, what was excellent in the mobility of the fatty acid residue is preferable, and as the group (B2), an alkenyl group is preferable. Furthermore, polyoxyethylene fatty acid methyl glucoside having 2 oleic acid residues and polyoxyethylene fatty acid sorbit having 2 oleic acid residues are more preferred.

Specific examples of the component (B) include polyoxyethylene dioleic acid methyl glucoside, distearic acid polyoxyethylene methyl glucoside, polyoxyethylene trioleic acid methyl glucoside, triisostearic acid polyoxyethylene methyl glucoside, tetraoleic acid polyoxy Ethylene sorbite, polyoxyethylene sorbitol tristearate, polyoxyethylene sorbite hexastearate, polyoxyethylene sorbitol pentaoleate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan triisostearate, polyoxyethylene sorbitan trioleate , Polyethylene glycol dilaurate, polyethylene glycol distearate, polyethylene glycol diisostearate , Polyethylene glycol dipalmitate, polyethylene glycol dioleate, polyoxyethylene glyceryl distearate, polyoxyethylene glyceryl tristearate, polyoxyethylene glyceryl diisostearate, polyoxyethylene glyceryl triisostearate, polyoxyethylene trioleate Examples include glyceryl, polyoxyethylene triisostearate hydrogenated castor oil, polyoxyethylene pentaerythritol tetrastearate, and the like.
Of these, from the viewpoint of foam stability and foam feel, polyoxyethylene (120) dioleic acid methyl glucoside, polyoxyethylene (20) distearic acid methyl glucoside, triisostearic acid polyoxyethylene (120) methyl glucoside, poly Oxyethylene (120) trioleic acid methyl glucoside and tetraoleic acid polyoxyethylene (40) sorbit are preferable, and polyoxyethylene (120) dioleic acid methyl glucoside is more preferable.

  The nonionic surfactant of a component (B) can be used 1 type or in combination of 2 or more types. The content of the component (B) is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and more preferably 0.3% by mass or more in the total amount of aerosol cosmetics from the viewpoint of improving foam elasticity. More preferably, 5 mass% or less is preferable, 4 mass% or less is more preferable, and 3 mass% or less is still more preferable. Moreover, 0.01-5 mass% is preferable in the aerosol cosmetics whole quantity, and, as for content of a component (B), 0.1-4 mass% is more preferable, and 0.3-3 mass% is still more preferable.

  In the present invention, the mass ratio (A) / (B) of the components (A) and (B) is 7 or less, preferably 6 or less, and preferably 5 or less from the viewpoint of reducing the viscosity of the stock solution of the aerosol cosmetic. More preferably, 1 or more is preferable, and 1.5 or more is more preferable. Moreover, mass ratio (A) / (B) of component (A) and (B) is 7 or less, 1-7 are preferable, 1-6 are more preferable, and 1.5-5 are still more preferable. By reducing the viscosity of the aerosol cosmetic stock solution, the miscibility with the propellant is further improved, and the gas solubility can be increased during filling. Furthermore, the dispersibility of the liquefied gas at the time of shaking at the time of discharge can be improved, and creamy foam quality can also be obtained.

The component (C) (meth) acrylic acid polymer used in the present invention is a polymer obtained by polymerizing (meth) acrylic acid (used as a generic name for acrylic acid and methacrylic acid) as a monomer.
Specifically, poly (meth) acrylic acid, carboxyvinyl polymer, alkyl acrylate / alkyl methacrylate / polyoxyethylene (20) stearyl ether copolymer (INCI: ACRYLATES / STEARETH-20 METHACRYLATE COPOLYMER), alkyl acrylate・ Alkyl methacrylate-polyoxyethylene (25) lauryl ether copolymer (INCI: ACRYLATES / LAURETH-25 METHACRYLATE COPOLYMER), alkyl acrylate, alkyl methacrylate, polyoxyethylene (25) behenyl ether copolymer (INCI: ACRYLATES / BEHENETH-25 METHACRYLATE COPOLYMER), acrylic acid / alkyl methacrylate copolymer (INCI: ACRYLATES / C10-30 ALKYL ACRYLATE CROSSPOLYMER), acrylic acid / neodecanoic acid vinyl copolymer (INCI: ACRYLATES / VINYL NEODECANOATE CROSSPOLYMER), (Alkyl acrylate / octylacrylamide) (INCI: ACRYLATES / OCTYLACRYLAMIDE COPOLYMER), (Acrelates / STEARETH-20 ITACONATE COPOLYMER), (Acrelates / Iceconic acid cetates-20) copolymer (INCI: ACRYLATES / CETETH-20) ITACONATE COPOLYMER), (acrylates / amino acrylate / C10-30 acrylic PEG-20 itaconic acid) copolymer (INCI: ACRYLATES / AMINOACRYLATES / C10-30ALKYL PEG-20 ITACONATE COPOLYMER), and the like.

  These polymers include Aculin 88, Aculin 22, Aculin 28, Aculin 38 (above, manufactured by Rohm and Haas Japan), Carbopol 980, Carbopol 981, Carbopol ETD2020, Carbopol Ultrez 21, Carbopol Ultrez 20, Carbopol Ultrez 10, Carbopol Aqua SF-1, PEMULEN TR-1, PEMULEN TR-2 (above, manufactured by Lubrizol), STRUCTURE 2001, STRUCTURE 3001, STRUCTURE PLUS, DERMACRYL 79 (above, NSSC Japan) Manufactured by Nippon Pure Chemicals Co., Ltd., and commercial products such as Aronbis, Junron, and Rheozic can be used.

  As the component (C), poly (meth) acrylic acid, carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer (INCI: ACRYLATES / C10-30 ALKYL ACRYLATE CROSSPOLYMER) is preferable.

  These (meth) acrylic acid polymers are neutralized and exist as salts. Specific examples of the salt of component (C) include alkali metal salts, alkaline earth metal salts, ammonium salts, alkyl or alkenyl ammonium salts having 1 to 22 carbon atoms, and alkyl or alkenyl substituted pyridinium salts having 1 to 22 carbon atoms. And salts such as alkanol ammonium salts having 1 to 22 carbon atoms and basic amino acid salts. Of these, alkali metal salts such as sodium and potassium are preferred.

  The (meth) acrylic acid polymer of component (C) can be used alone or in combination of two or more. The content of the component (C) is 0.01% by mass or more and 0.05% by mass or more in the total amount of aerosol cosmetics from the viewpoint of dispersing the propellant and improving the retention of the propellant after ejection. Is preferable, 0.1 mass% or more is more preferable, 3 mass% or less is preferable, 2 mass% or less is preferable, and 1.5 mass% or less is more preferable. Moreover, content of a component (C) is 0.01-3 mass% in aerosol cosmetics whole quantity, 0.05-2 mass% is preferable, and 0.1-1.5 mass% is more preferable.

  As the water of component (D), various waters such as natural water, hot spring water, seawater, deep water, purified water, ion exchange water and the like can be used. The content of water is preferably 50 to 95% by mass, more preferably 60 to 92% by mass in the total amount of the aerosol cosmetic, and the remainder of the components and other components constituting the aerosol cosmetic.

Examples of the propellant for component (E) include carbon dioxide, liquefied petroleum gas (LPG), isobutane, normal butane, neopentane, isopentane, dimethyl ether, nitrogen gas, and the like, and preferably contains carbon dioxide. These can be used alone or in combination of two or more.
The propellant is filled in a pressure-resistant container, and a part of the propellant is dissolved, dispersed, and separated in the liquid in the pressure-resistant container. Preferably, the propellant is shaken and dispersed immediately before use. Foam when applied.
In addition to functioning as a propellant, the carbon dioxide gas in the foam and the carbon dioxide dissolved in the liquid portion have an action of promoting blood circulation on the skin. Therefore, the carbon dioxide gas is preferably present in the stock solution at a high concentration in the container. The amount of carbon dioxide dissolved in the liquid in the pressure vessel is preferably 500 to 25,000 ppm, more preferably 700 to 20,000 ppm from the viewpoint that a sufficient effect can be imparted when applied to the skin.

  In the present invention, the content of the component (E) is preferably 0.1% by mass or more, and 0.2% by mass or more in the total amount of the aerosol cosmetic from the viewpoint of good foamability and foam quality. More preferably, 0.3 mass% or more is still more preferable, 10 mass% or less is preferable, 9 mass% or less is more preferable, and 8 mass% or less is still more preferable. Moreover, 0.1-10 mass% is preferable in the aerosol cosmetics whole quantity, and, as for content of a component (E), 0.2-9 mass% is more preferable, and 0.3-8 mass% is still more preferable. Further, the carbon dioxide gas and the nitrogen gas, which are compressed gases, are more preferably 0.1 to 3% by mass and still more preferably 0.5 to 2% by mass in the total amount of the aerosol cosmetic. Further, LPG, isobutane, normal butane, isopentane and dimethyl ether, which are liquefied gases, are more preferably 0.5 to 10% by mass, and further preferably 1 to 8% by mass in the total amount of the aerosol cosmetic.

  Unlike liquefied petroleum gas (LPG), carbon dioxide gas does not liquefy even when filled in an aerosol container, and simply becomes a high-pressure gas. As a result, at the time of filling, the gas pressure supplied from the inside of the container and the filling machine becomes equal immediately, and filling does not proceed. Therefore, in order to use carbon dioxide gas as a propellant, a step of dissolving in an aerosol cosmetic stock solution is required. Usually, the aerosol container is shaken, the stock solution is fluidized, and the contact area between the stock solution and the gas is increased. However, if the viscosity of the undiluted solution is high, in the shaking process, the entire inside of the container becomes foam and loses fluidity, and as a result, filling of the propellant does not proceed. In the present invention, by mixing the component (B) at a specific ratio in a system in which the components (A), (C), and (D) are dissolved, the viscosity of the stock solution is reduced and the dissolution rate of the propellant is accelerated. I found out. In addition, when LPG is used as a propellant, the miscibility between the stock solution and LPG by shaking before ejection can be improved, and a good creamy foam quality free from foam unevenness during ejection can be obtained.

The aerosol cosmetic composition of the present invention can further contain (F) hyaluronic acid. Hyaluronic acid can reduce the viscosity of the stock solution of the aerosol cosmetic of the present invention, and can increase the miscibility of the propellant and the stock solution. Furthermore, after discharging the cosmetic, the elasticity of the obtained foam is further improved, and the moisture retention can be improved.
Hyaluronic acid is a kind of acidic mucosaccharide, which is a chain-like polysaccharide in which β-DN-acetylglucosamine and β-D-glucuronic acid are alternately bonded. When dissolved in water, a highly transparent solution is formed. It is obtained. Examples of the salt include sodium and potassium, and sodium is preferable.
As hyaluronic acid and its salt, commercially available products can be used, and those extracted from animal tissues and those produced by fermentation by culturing microorganisms can also be used. Examples of the fermentation method include a method using Streptococcus zooepidemic-us, a kind of streptococci.

The weight average molecular weight of hyaluronic acid and its salt is preferably from 30,000 to 3 million, more preferably from 40,000 to 2.5 million, and even more preferably from 50,000 to 2 million, from the viewpoint of foam elasticity. . Hydrolyzed hyaluronic acid and hyaluronic acid salts can also be used.
Although the measuring method of molecular weight is not limited, For example, the intrinsic viscosity is calculated | required from dynamic viscosity, The method of converting this intrinsic viscosity into molecular weight, the simple measuring method by a liquid chromatography, etc. are mentioned.
Of hyaluronic acid and hyaluronate, sodium hyaluronate is preferable from the viewpoints of solubility in water, feeling of use on the skin, and the like.

  Component (F) can be used singly or in combination of two or more, and the content is preferably 0.001% by mass or more, and 0.01% by mass in the total amount of the aerosol cosmetic from the viewpoint of foam elasticity. The above is more preferable, 0.02% by mass or more is further preferable, 3% by mass or less is preferable, 2% by mass or less is more preferable, and 1% by mass or less is still more preferable. In addition, the content of the component (E) is preferably 0.001 to 3% by mass, more preferably 0.01 to 2% by mass, and still more preferably 0.02 to 1% by mass in the total amount of the aerosol cosmetic.

  The aerosol cosmetic composition of the present invention further includes components used in ordinary cosmetics, such as alcohols, oils, moisturizers other than component (F), fragrances, plant extracts, bactericides, preservatives, chelating agents, and the like. Can be contained.

The aerosol cosmetic of the present invention is produced by filling a pressure resistant container with a stock solution containing components (A), (B), (C) and (D) and (E) a propellant.
The pressure vessel may be in any form that allows the content liquid to be discharged in the form of foam, for example, a normal single-chamber can such as aluminum or tin can be used, and the container material is an acetal resin, A synthetic resin container such as a polycarbonate-based resin, glass, or the like can be used as long as it is within the pressure limit. When industrially filling a high-pressure propellant at a time, an impact can having an aluminum container thickness adjusted is preferable.

  The pressure in the pressure vessel is preferably less than 0.8 MPa at 25 ° C., more preferably 0.4 MPa or more and less than 0.75 MPa, more preferably 0.45 MPa or more and less than 0.75 MPa from the viewpoint of obtaining good foam. Preferably, 0.5 to 0.7 MPa is even more preferable.

  In the present invention, when carbon dioxide gas is contained, it becomes carbonate on the alkali side, not as carbon dioxide, and there is no blood circulation promoting effect. For this reason, the pH of the undiluted solution before filling with the propellant is preferably pH 2.5 to 7, preferably pH 4.5 to 6.5 from the viewpoint of obtaining an excellent blood circulation promoting effect by dissolving carbon dioxide at a high concentration. More preferred. As a pH adjuster for adjusting the pH within these ranges, for example, organic acids such as citric acid, malic acid and tartaric acid, or salts thereof, or phosphoric acid or salts thereof can be used. In addition, by lowering the pH, the viscosity can be suppressed to be lower than the polymer content, which is advantageous. In addition, when carbon dioxide is used as a propellant, the viscosity of the stock solution is further easily lowered by the dissolution of carbon dioxide, which is convenient.

  In the present invention, the viscosity of the stock solution to be filled in the pressure vessel (before filling with the propellant) is determined as follows: foam retention during massage, productivity, dispersion or emulsification of the component (F) blended as necessary From the viewpoint of keeping the state stable, it is preferably 100 to 500,000 mPa · s at 25 ° C., more preferably 150 to 200,000 mPa · s, and further preferably 250 to 50,000 mPa · s.

The aerosol cosmetic composition of the present invention can be produced as follows.
Step 1: Ingredient (D) is heated to 40 ° C. or higher and 100 ° C. or lower, and components (A), (B), (C) and a neutralizer for component (C) are mixed and made uniform. To do.
Step 2: The liquid 1 obtained in the step 1 is cooled to 10 to 30 ° C., and other components are mixed and made uniform to obtain a stock solution.
Step 3: Fill the aerosol container with the stock solution, seal it, and then fill with (E) propellant.
Furthermore, if necessary, in step 2, after cooling to 10 to 30 ° C., the component (F) is mixed and uniformed to obtain a stock solution.
In step 1, the components (A), (B), and (C) are dispersed in a part of the component (D), and further heated to substantially the same temperature as the component (D). , Can be mixed with component (D).

The aerosol cosmetic of the present invention is used by discharging foam.
The aerosol cosmetic of the present invention can be used by applying to the skin and massaging.
The aerosol cosmetic composition of the present invention is preferably used by applying on the skin and spreading the generated foam on the skin. Here, as an application means on the skin, it may be directly discharged onto the desired skin to form bubbles on the spot, but it is discharged onto the hand to form bubbles, and the bubbles are formed on the desired skin. You may apply to. The foam formed by the aerosol cosmetic of the present invention is stable for a long time, and can be used to spread the foam on the skin, to massage the skin together with the foam. If carbon dioxide is used as a propellant, high-concentration carbon dioxide acts on the skin for a long time, and an excellent blood circulation promoting effect can be imparted. After application, the cosmetic of the present invention can be wiped off or washed away.
This invention discloses the following compositions further regarding embodiment mentioned above.

<1> The following components (A), (B), (C) and (D):
(A) Amino acid surfactant 0.01 to 10% by mass,
(B) (B1) a nonionic surfactant having two or more polyoxyethylene groups and (B2) at least one or two or more groups selected from alkyl groups and alkenyl groups,
(C) (meth) acrylic acid polymer 0.01-3 mass%,
(D) Aerosol formed by filling a pressure-resistant container with a stock solution containing water and having a mass ratio (A) / (B) of components (A) and (B) of 7 or less, and (E) a propellant. Cosmetics.

<2> The aerosol cosmetic according to <1>, wherein the amino acid surfactant of component (A) is preferably an N-acylamino acid or a salt thereof.
<3> The amino acid-based surfactant of component (A) is preferably an N-acyl glutamic acid having an acyl group having 12 to 18 carbon atoms and a salt thereof, or an N-acyl aspartic acid having an acyl group having 12 to 18 carbon atoms. The aerosol cosmetic according to <1> or <2>, which is a salt thereof.
<4> The aerosol cosmetic according to any one of <1> to <3>, wherein the amino acid surfactant of component (A) is preferably N-cocoylglutamic acid or a salt thereof.
<5> The content of the amino acid surfactant as the component (A) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and more preferably 7% by mass as a salt in the total amount of the aerosol cosmetic composition. % Or less, and 5 mass% or less is more preferable The aerosol cosmetics in any one of said <1>-<4>.

<6> Polyoxyethylene fatty acid methyl glucoside in which component (B) preferably has 2 to 4 fatty acid residues having 8 to 22 carbon atoms, polyoxyethylene fatty acid having 2 to 6 fatty acid residues having 8 to 22 carbon atoms Sorbit, polyoxyethylene fatty acid sorbitan having 2 to 4 fatty acid residues having 8 to 22 carbon atoms, polyoxyethylene fatty acid ester having 2 fatty acid residues having 8 to 22 carbon atoms, fatty acid residues having 8 to 22 carbon atoms Polyoxyethylene fatty acid glyceryl having 2 to 3, polyoxyethylene hydrogenated castor oil having 3 fatty acid residues having 8 to 22 carbon atoms, polyethylene glycol fatty acid ester having 2 fatty acid residues having 8 to 22 carbon atoms, and 8 to 8 carbon atoms 1 or 2 or more types selected from polyoxyethylene fatty acid pentaerythrit having 4 fatty acid residues of 22 Serial <1> to aerosol cosmetics as claimed in any one of <5>.

<7> Polyoxyethylene fatty acid having component (B), preferably polyoxyethylene fatty acid methyl glucoside having 2 to 4 fatty acid residues having 12 to 18 carbon atoms and polyoxyethylene fatty acid having 2 to 6 fatty acid residues having 12 to 18 carbon atoms The aerosol cosmetic according to any one of <1> to <6>, which is one or more selected from sorbitol and polyoxyethylene fatty acid sorbitan having 2 to 4 fatty acid residues having 12 to 18 carbon atoms.
<8> The component (B) is preferably one or more selected from polyoxyethylene fatty acid methyl glucoside having 2 oleic acid residues and polyoxyethylene fatty acid sorbit having 2 oleic acid residues < The aerosol cosmetic according to any one of 1> to <7>.
<9> The mass ratio (A) / (B) of the components (A) and (B) is preferably 6 or less, more preferably 5 or less, preferably 1 or more, and more preferably 1.5 or more <1>. -Aerosol cosmetics any one of <8>.
The content of <10> component (B) is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.3% by mass or more, and more preferably 5% by mass in the total amount of aerosol cosmetics. The aerosol cosmetic according to any one of <1> to <9>, preferably 4% by mass or less, more preferably 3% by mass or less.

<11> Component (C) is preferably poly (meth) acrylic acid, carboxyvinyl polymer, alkyl acrylate / alkyl methacrylate / polyoxyethylene (20) stearyl ether copolymer (INCI: ACRYLATES / STEARETH-20 METHACRYLATE COPOLYMER), alkyl acrylate, alkyl methacrylate, polyoxyethylene (25) lauryl ether copolymer (INCI: ACRYLATES / LAURETH-25 METHACRYLATE COPOLYMER), alkyl acrylate, alkyl methacrylate, polyoxyethylene (25) behenyl ether Copolymer (INCI: ACRYLATES / BEHENETH-25 METHACRYLATE COPOLYMER), acrylic acid / alkyl methacrylate copolymer (INCI: ACRYLATES / C10-30 ALKYL ACRYLATE CROSSPOLYMER), acrylic acid / vinyl neodecanoate copolymer (INCI: ACRYLATES) / VINYL NEODECANOATE CROSSPOLYMER), (alkyl acrylate / octyl) (Crylamide) Copolymer (INCI: ACRYLATES / OCTYLACRYLAMIDE COPOLYMER), (Acrylates / Steareth-20 ITACONATE COPOLYMER), (Acrylates / Catethate-20) Copolymer (INCI: ACRYLATES / CETETH) -20 ITACONATE COPOLYMER) and (Acrylates / Aminoacrylate / C10-30 Acrylic PEG-20 Itaconic Acid) Copolymer (INCI: ACRYLATES / AMINOACRYLATES / C10-30ALKYL PEG-20 ITACONATE COPOLYMER) The aerosol cosmetic according to any one of <1> to <10>.

<12> The above-mentioned <1> to <11>, wherein the component (C) is preferably one or more selected from poly (meth) acrylic acid, carboxyvinyl polymer, and acrylic acid / alkyl methacrylate copolymer. The aerosol cosmetic according to any one of the above.
The content of <13> component (C) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and preferably 2% by mass or less, and 1.5% by mass or less in the total amount of the aerosol cosmetic. The aerosol cosmetic according to any one of <1> to <12>, wherein is more preferable.
<14> The component <E> is preferably one or more selected from carbon dioxide, liquefied petroleum gas (LPG), isobutane, normal butane, neopentane, isopentane, dimethyl ether and nitrogen gas. The aerosol cosmetic according to any one of <13>.
<15> The aerosol cosmetic according to any one of <1> to <14>, wherein the component (E) is preferably carbon dioxide.

The content of <16> component (E) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, and more preferably 10% by mass in the total amount of aerosol cosmetics. The aerosol cosmetic according to any one of <1> to <15>, wherein the following is preferable, 9% by mass or less is more preferable, and 8% by mass or less is further preferable.
<17> Further preferably, the aerosol cosmetic according to any one of <1> to <16>, wherein (F) hyaluronic acid is contained in an amount of 0.001% by mass to 3% by mass in the total amount of the aerosol cosmetic. .
<18> The aerosol cosmetic according to any one of <1> to <17>, wherein pH of the stock solution is preferably pH 2.5 to 7, and more preferably pH 4.5 to 6.5.
<19> The viscosity at 25 ° C. of the stock solution is preferably 100 to 500,000 mPa · s, more preferably 150 to 200,000 mPa · s, and further preferably 250 to 50,000 mPa · s. The aerosol cosmetic according to any one of <18>.

<20> A method for using a cosmetic material in which the aerosol cosmetic material according to any one of <1> to <19> is applied to a skin and massaged.
<21> The method for producing an aerosol cosmetic according to any one of <1> to <19>, comprising the following steps.
Step 1: Component (D) is heated to 40 ° C. or higher, and components (A), (B), (C) and the neutralizing agent of component (C) are mixed and made uniform to make liquid 1.
Step 2: The liquid 1 obtained in the step 1 is cooled to 10 to 30 ° C., and other components are mixed and made uniform to obtain a stock solution.
Step 3: Fill the aerosol container with the stock solution, seal it, and then fill with (E) propellant.
<22> The method for producing an aerosol cosmetic according to <21>, wherein in step 2, the mixture is cooled to 10 to 30 ° C. and then (F) hyaluronic acid is mixed.

Examples 1-5, Comparative Examples 1-2
Manufacture aerosol cosmetics with the composition shown in Table 1 and measure the pH and viscosity of the stock solution, and the concentration of carbon dioxide, and put your finger into the foam (1), liquefied gas dispersibility, foam quality immediately after ejection, and foam. The hardness of the foam and the state of the foam when the shear was added to the foam were evaluated. The results are also shown in Table 1.

(Production method)
A part of component (D) is heated to 60 ° C. or higher, and component (C) dispersed in part of component (D) is mixed with part of component (D) and component (A) to 60 ° C. or higher. The solution was heated to make it uniform. Thereafter, the neutralizing agent of component (C) was added to make uniform. Furthermore, the component (B), the water-soluble polymer, and tocopherol nicotinate were mixed and made uniform. Then, it cooled to 25 degreeC. Thereafter, the component (F) and other components (polyhydric alcohol, plant extract, etc.) were added and homogenized to obtain a stock solution.
The obtained stock solution was filled in a pressure-resistant container (aluminum single layer can) having a volume of 222 mL, and then filled with a propellant (E) to obtain an aerosol cosmetic (massage agent).

(Evaluation method)
(1) pH:
The pH of the stock solution was measured at 25 ° C. using a pH meter (Horiba, F-52) immediately after production. The measurement was performed directly without diluting the stock solution.

(2) Viscosity:
The viscosity of the stock solution was measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) at a measurement temperature of 25 ° C., a rotation speed of 30 rpm, and 1 minute. For the stock solution viscosity of less than 850 mPa · s, the rotor No. 2. For the stock solution viscosity of 850 mPa · s to less than 4000 mPa · s, the rotor No. 3. For the stock solution viscosity of 4000 mPa · s or more, the rotor No. 4 was used.

(3) Carbon dioxide concentration:
The coating agent was discharged from the pressure vessel in an atmosphere of 25 ° C., and the concentration of carbon dioxide gas was measured. As the carbon dioxide concentration measuring device, a portable ion / pH meter IM-32P (carbon dioxide electrode CE-2041) manufactured by Toa DKK Corporation was used.

(4) Fillability (1):
The stock solution obtained above was filled into a container, the valve was fixed, the inside of the container was evacuated, and a specific amount of propellant was filled. The obtained aerosol cosmetic is immediately shaken at 50 cpm / 3 minutes using a shaker (AS ONE MIX ROTOR VMR-5R). Then, the internal pressure when measuring an internal pressure was shown on the following references | standards. The smaller the internal pressure, the better the gas dissolves, and the easier it is to fill the propellant (indicating that it can be filled in a short time).
<Criteria>
5: Less than 0.61 MPa.
4: 0.61 MPa or more and less than 0.64 MPa.
3: 0.64 MPa or more and less than 0.68 MPa.
2: 0.68 MPa or more and less than 0.73 MPa.
1: 0.73 MPa or more.

(5) Liquefied gas dispersibility:
After filling the pressure-resistant glass bottle with 30 g of the stock solution obtained above and fixing the valve, it was filled with a specific amount of propellant. The obtained aerosol cosmetic is immediately shaken 5 times with one reciprocation per second at a shaking width of 20 cm. Then, the state at the time of seeing the content liquid visually was shown by the following criteria.
3: The liquefied gas was dispersed, and the entire content liquid became uniformly cloudy.
2: The liquefied gas is dispersed and becomes cloudy, but a nonuniform and liquid content liquid is observed.
1: The liquefied gas does not disperse and remains on the upper part of the content liquid.

(6) Foam quality immediately after discharging:
Five specialist panelists discharged foam from each aerosol cosmetic so as to have a diameter of 3 cm on the skin and held for 2 minutes. The fineness of the foam immediately after discharging was evaluated according to the following criteria. A result is shown by the average value of 5 persons.
5: The fine texture of the foam is maintained immediately after discharge and 2 minutes later.
4: Immediately after discharge, the foam is fine, but after 2 minutes the foam is slightly rough.
3: The foam is slightly rough immediately after discharge, and the texture of the foam is rough after 2 minutes.
2: Immediately after ejection, the foam is rough and after 2 minutes it becomes a paste.
1: Does not become foam.

(6) Hardness when a finger is put into the foam:
The following criteria are used to determine the hardness of the foam when five specialist panelists discharge foam from each aerosol cosmetic to 3cmφ on the skin, and add a share to draw a circle once with their fingertips. It was evaluated with. A result is shown by the average value of 5 persons.
5: Hard.
4: Slightly hard.
3: Normal.
2: Slightly soft.
1: Soft.

(7) The state of the foam when the share is added to the foam:
The state of the foam when 5 specialist panelists spray each foam cosmetic to 3cmφ on the skin and apply a share to draw a circle for 40 seconds once per second with a fingertip Was evaluated according to the following criteria. A result is shown by the average value of 5 persons.
5: Bubbles are not crushed even after 40 times, and fine bubbles remain.
4: Foam is slightly crushed at 40 times, leaving a slightly rough foam.
3: 20 times the coarse foam remains, and 40 times the foam collapses.
2: By 20 times, the bubbles are crushed and a paste-like liquid remains.
1: Bubbles are crushed by 5 times and a paste-like liquid remains.

Examples 6-7, Comparative Examples 3-5
In the same manner as in Examples 1 to 5, an aerosol cosmetic composition having the composition shown in Table 2 was produced, and the pH and viscosity of the stock solution and the carbon dioxide gas concentration were measured, and the finger was put into the foam quality and foam immediately after ejection. The hardness of the time and the state of the foam when the shear was added to the foam were evaluated. The results are also shown in Table 2.

Examples 8 to 10, Comparative Example 6
In the same manner as in Examples 1 to 5, an aerosol cosmetic composition having the composition shown in Table 3 was produced, and the pH and viscosity of the stock solution and the carbon dioxide gas concentration were measured, and the finger was put into the foam quality and foam immediately after ejection. The hardness of the time and the state of the foam when the shear was added to the foam were evaluated. Further, the filling property (2) was evaluated. The results are also shown in Table 3.

(Evaluation method)
Fillability (2):
The stock solution obtained above was filled into a container, the valve was fixed, the inside of the container was evacuated, and a specific amount of propellant was filled. The obtained aerosol cosmetic is immediately measured for internal pressure (1). Thereafter, the mixture is shaken at 50 cpm / 6 minutes using a shaker (AS ONE MIX ROTOR VMR-5R). Thereafter, the internal pressure (2) is measured. The value of internal pressure (2) -internal pressure (1) was determined and indicated by the following criteria. The larger this value (internal pressure difference), the better the gas will dissolve. (Evaluation when viscosity is high)
<Criteria>
1: Less than 0.08 MPa.
2: 0.08 MPa or more and less than 0.10 MPa.
3: 0.10 MPa or more and less than 0.12 MPa.
4: 0.12 MPa or more and less than 0.14 MPa.
5: 0.14 MPa or more.

Examples 11-13, Comparative Examples 7-8
In the same manner as in Examples 1 to 5, an aerosol cosmetic composition having the composition shown in Table 4 was produced, and the pH and viscosity of the stock solution and the carbon dioxide gas concentration were measured, and the finger was put into the foam quality and foam immediately after ejection. The hardness of the time and the state of the foam when the shear was added to the foam were evaluated. The results are also shown in Table 4.

Claims (7)

The following components (A), (B), (C) and (D):
(A) Amino acid surfactant 0.01 to 10% by mass,
(B) (B1) a nonionic surfactant having two or more polyoxyethylene groups and (B2) at least one or two or more groups selected from alkyl groups and alkenyl groups,
(C) (meth) acrylic acid polymer 0.01-3 mass%,
(D) Aerosol formed by filling a pressure-resistant container with a stock solution containing water and having a mass ratio (A) / (B) of components (A) and (B) of 7 or less, and (E) a propellant. Cosmetics.   The component (B) is a polyoxyethylene fatty acid methyl glucoside having 2 to 4 fatty acid residues having 12 to 18 carbon atoms, a polyoxyethylene fatty acid sorbit having 2 to 6 fatty acid residues having 12 to 18 carbon atoms, and the carbon number The aerosol cosmetic according to claim 1, wherein the aerosol cosmetic is one or more selected from polyoxyethylene fatty acid sorbitans having 2 to 4 fatty acid residues of 12 to 18.   Furthermore, the aerosol cosmetics of Claim 1 or 2 which contain 0.001 mass% or more and 3 mass% or less of (F) hyaluronic acid.   The aerosol cosmetic according to any one of claims 1 to 3, wherein the component (E) is carbon dioxide.   The usage method of the cosmetics which apply | coat the aerosol cosmetics of any one of Claims 1-4 to skin, and massage. The manufacturing method of the aerosol cosmetics of any one of Claims 1-4 provided with the following processes.
Step 1: Component (D) is heated to 40 ° C. or higher, and components (A), (B), (C) and the neutralizing agent of component (C) are mixed and made uniform to make liquid 1.
Step 2: The liquid 1 obtained in the step 1 is cooled to 10 to 30 ° C., and other components are mixed and made uniform to obtain a stock solution.
Step 3: Fill the aerosol container with the stock solution, seal it, and then fill with (E) propellant.   The manufacturing method of the aerosol cosmetics of Claim 6 which mixes (F) hyaluronic acid after cooling to 10-30 degreeC in the process 2.