JP5554007B2 - Foam skin application - Google Patents

Description

  The present invention relates to a foamy skin coating agent containing carbon dioxide.

  Since carbon circulation is promoted when carbon dioxide (carbon dioxide gas) acts on the skin, various carbon dioxide-containing cosmetics have been proposed. For example, coexisting ethanol with higher solubility of carbon dioxide than water to supply a higher carbon dioxide saturated solution, a method of keeping the jet liquid highly viscous to suppress the volatilization of carbon dioxide, carbon dioxide There is known a method of coexisting polyhydric alcohol at a high concentration in order to maintain a high concentration (Patent Documents 1 to 3). Moreover, an active ingredient can be apply | coated simply and effectively by using liquefied petroleum gas (LPG), compressed gas, etc. together as a propellant to make an aerosol foam. Such foam agents are required to have various foam performances (foam quality, foam retention, stability, applicability, etc.) depending on the method of use and purpose, and various studies have been made. In particular, when carbon dioxide is blended at a high concentration as an active ingredient, the carbon dioxide itself may have a foam-forming function, and it is necessary to consider the influence on the internal pressure and the stock solution composition.

  In general, liquefied petroleum gas has a problem of strong flammability and poor foamability at low temperatures. As a technique for solving this problem, Patent Document 4 discloses that an aqueous stock solution containing water and a surfactant has high safety against fire by using liquefied petroleum gas and carbon dioxide as a compressed gas in combination. An aerosol foam composition is disclosed in which no difference in foamability is observed even at low temperatures. Further, as an aerosol agent for promoting blood circulation using carbon dioxide gas, a foaming skin blood circulation accelerator (foam persistence agent) which improves the foam persistence of foam using specific hydrocarbons such as isopentane and n-pentane as carbon dioxide ( Patent document 5) is known.

  In general, in an aerosol foam composition, in addition to the above gas composition, the stock solution composition also affects the foam performance. Moreover, the surfactant mix | blended with undiluted | stock solution may produce irritation depending on a compounding quantity and kind. N-acylamino acids, which are a kind of anionic surfactant, are generally blended in a cleaning agent or the like as a base material with little skin irritation. However, in the foaming agent containing carbon dioxide at a high concentration, it is difficult to stabilize the viscosity when N-acylamino acids are added to the stock solution, and the crystals of N-acylamino acids are likely to precipitate. In particular, a stable foam quality cannot be obtained at low temperatures.

JP 59-141512 A Japanese Patent Laid-Open No. 11-228334 JP-A-11-171755 JP 2001-72543 A JP 2005-2046 A

  An object of the present invention is an aerosol having an internal pressure of less than 0.7 MPa, less irritating at the time of use, carbon dioxide is allowed to act on the skin for a long time, and a sufficient blood circulation promoting effect is obtained. Another object of the present invention is to provide a foamy skin coating agent that maintains good foam.

Therefore, the present inventor has conducted various studies to obtain a skin coating agent containing N-acylamino acid or a salt thereof as an anionic surfactant in the stock solution and containing carbon dioxide at a high concentration. Two kinds of thickening polymers are used in combination, and 0.1 to 3 mass of a mixture containing 70 to 100 mass% of saturated hydrocarbons having carbon dioxide and a vapor pressure at 35 ° C of 0.1 MPa or more and less than 0.5 MPa. By filling the%, stability during storage, particularly good foam can be formed even at low temperatures, and when discharged onto the skin, foam containing carbon dioxide at a high concentration is retained on the skin for a long time, It was also found that a foamy skin coating agent having a good blood circulation promoting action can be obtained.
That is, this invention provides the foamy skin coating agent containing the following component (A)-(E), and being filled so that the internal pressure in a pressure-resistant container may be less than 0.7 MPa at 25 degreeC. It is.
(A) N-acylamino acid or a salt thereof 0.1 to 20% by mass,
(B) (meth) acrylic acid polymer,
(C) polysaccharide polymer,
(D) carbon dioxide, and (E) a mixture selected from hydrocarbons having 3 to 5 carbon atoms, and saturated hydrocarbons having a vapor pressure of 0.1 MPa or more and less than 0.5 MPa at 35 ° C. in the mixture are 70 to Hydrocarbon mixture contained in 100% by mass 0.1-3% by mass.

  The foam-like skin coating agent of the present invention can form good foams even during storage, particularly at low temperatures, while the internal pressure of the container is less than 0.7 MPa. Moreover, when it is discharged onto the skin, a foam containing carbon dioxide at a high concentration is retained on the skin for a long time, and massage on the skin can be easily performed, and an excellent blood circulation promoting effect can be obtained.

  Although the foamy skin coating agent of this invention contains the said component (A)-(E), specifically, the undiluted | stock solution containing the said component (A), (B) and (C), and a component ( It is obtained by enclosing D) and (E) in a pressure vessel so that the internal pressure is less than 0.7 MPa (25 ° C.).

The amino acid moiety in the (A) N-acylamino acid or salt thereof of the present invention includes acidic amino acids such as glutamic acid and aspartic acid; glycine, alanine, β-alanine, methylalanine, valine, leucine, isoleucine, cysteine, proline, serine , Neutral amino acids such as threonine and sarcosine. Among these, acidic amino acids or alanine, β-alanine, methylalanine, and sarcosine are preferable from the viewpoint of stability under acidic conditions, and glutamic acid is particularly 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.
In addition, the acyl group preferably has a saturated or unsaturated linear or branched chain having 8 to 18 carbon atoms from the viewpoint of foam quality, foaminess, and low-temperature stability. As such an acyl group, for example, caproyl Group, capryloyl group, caprynoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, isostearoyl group, oleoyl group, linoleoyl group, cocoyl group (coconut oil fatty acid acyl group), palm oil fatty acid acyl group, palm kernel oil Examples include fatty acid acyl groups, beef tallow fatty acid acyl groups, linear and branched synthetic fatty acid acyl groups, and the like. Among these, a lauroyl group, a myristoyl group, and a cocoyl group are preferable from the viewpoint of foaminess and stability.

  (A) 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. These salts include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, inorganic salts such as aluminum and zinc; organic amines such as ammonia, monoethanolamine, diethanolamine and triethanolamine salts. Or organic salts such as basic amino acids such as arginine, lysine, histidine, ornithine. From the viewpoints of availability, handling properties, etc., alkali metal salts, organic amine salts, and basic amino acid salts are preferable, and sodium salts, potassium salts, triethanolamine salts, and arginine salts are particularly preferable.

Specific examples include 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-lauroyl aspartic acid, N-cocoyl aspartic acid, N-myristoyl aspartic acid, N-palmitoyl aspartic acid, N-stearoyl aspartic acid, N-cocoylalanine, N-lauroylmethylalanine, N-myristoylmethylalanine, N-cocoylmethylalanine, N-lauroylsarcosine, N-myristoylsarcosine , N-cocoyl sarcosine and the like, and sodium salt, potassium salt, arginine salt, triethanolamine salt and the like thereof.
Among these, from the viewpoint of foamability and low-temperature stability, sodium N-lauroyl glutamate, potassium N-lauroyl glutamate, sodium N-myristoyl glutamate, potassium N-myristoyl glutamate, sodium N-cocoyl glutamate, and potassium N-cocoyl glutamate preferable.

  In the present invention, N-acylamino acids or salts thereof can be used alone or in combination of two or more. Component (A) is contained in the total amount of the in-container composition in an amount of 0.1 to 20% by mass, preferably 0.1 to 15% by mass, particularly 0.5, from the viewpoint of stability and foam quality. -10 mass% is preferable.

Examples of the (B) (meth) acrylic polymer used in the present invention include carboxyvinyl polymer, alkyl acrylate copolymer, acrylic acid / alkyl acrylate copolymer, acrylic acid / alkyl methacrylate copolymer, poly Examples include (meth) acrylic acid polymers such as sodium acrylate. Specifically, Lubrizol Advanced Materials, Inc. Carbopol, PEMULEN, Rohm and Haas Aculine, SEPPIC SEPIGEL, SIMULGEL, SEPPLUS and SEPINOV, Nippon NSC Co., Ltd., Marcote from NALCO COMPANY, Nippon Pure Chemical Co., Ltd., Jurimer and Aronbis, A commercially available product such as Sofcare KG from Kao Corporation can be used.
The (meth) acrylic acid-based polymer can be used alone or in combination of two or more, and the content thereof is preferably 0.01 to 5% by mass, particularly 0.05 to 3% in the total amount of the composition in the container. Mass% is preferred.

  Specific examples of the polysaccharide polymer of the present invention include cellulose polymers such as microcrystalline cellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, and cationized cellulose; xanthan gum, hydroxy Microbial polymers such as propylxanthan gum, pullulan, cyclodextrin, dextran, curdlan, succinoglucan; starch polymers such as starch, soluble starch, carboxymethyl starch, methyl starch, starch phosphate; guar gum, cationization Guar gum polymers such as guar gum and hydroxypropylated guar gum; algi such as propylene glycol alginate and sodium alginate Acid polymer; carrageenan, agar, quince seed gum, mannan, dextrin, dextrin fatty acid esters, locust bean gum, gum arabic, tragacanth, pectin, chitin, and the like. Among these, cellulose-based polymers and microbial-based polymers are preferable from the viewpoint of foaminess and stability. In addition, the polysaccharide polymer can be used alone or in combination of two or more, and the content thereof is preferably 0.01 to 5% by mass, particularly 0.05 to 3% by mass, based on the total amount of the composition in the container. Is preferred.

  The foam-like skin coating agent of the present invention not only forms a good foam at the time of jetting, but also imparts a sufficient blood circulation promoting effect by holding a high concentration of carbon dioxide in the foam on the skin. It is important that the foam on the top is held in a foam, in other words, it is difficult for the foam to disappear. Therefore, it is necessary to use N-acylamino acids in combination with two types of polymers, an acrylic acid polymer and a polysaccharide polymer. Viscosity polymers other than (B) and (C) can also be included within a range that does not affect the effects of the present invention. 02-10 mass% is preferable, and it is especially preferable that it is 0.1-5 mass%.

  Component (D), carbon dioxide, is an active ingredient of the foamy skin coating agent of the present invention that is filled as a gas in a pressure resistant container, and also functions as a propellant, part of which is pressure resistant. It dissolves in the liquid in the container and foams when applied to the skin. On the skin, gaseous carbon dioxide in the foam and carbon dioxide dissolved in the liquid portion have an action of promoting blood circulation in the skin. Therefore, it is preferable that carbon dioxide is present at a high concentration in the liquid in the container. The amount of carbon dioxide dissolved in the liquid in the pressure vessel is 500 to 25,000 ppm, more preferably 1,000 to 20,000 ppm, and particularly 5,000, in that a sufficient effect can be imparted when applied to the skin. It is preferable to set it to -18,000 ppm.

  The hydrocarbon mixture of the component (E) has an action of foaming together with carbon dioxide to form a foam containing carbon dioxide at a high concentration when the foamy skin coating composition of the present invention is applied to the skin. The hydrocarbon mixture has a vapor pressure at 35 ° C. so that the coating agent of the present invention maintains less than 0.7 MPa at 25 ° C. at the pressure inside the pressure vessel and has both good foam quality and blood circulation promoting effect when discharged. It is important that the saturated hydrocarbon of 0.1 MPa or more and less than 0.5 MPa is 70 to 100% by mass, particularly 80 to 100% by mass from the viewpoint of enhancing the effect at the time of use, and further 90 to 100%. It is preferable that it is mass%, especially 95-100 mass%. The saturated hydrocarbon having a vapor pressure at 35 ° C. of 0.1 MPa or more and less than 0.5 MPa includes isobutane having 4 carbon atoms (0.46 MPa), normal butane (0.33 MPa); neopentane having 5 carbon atoms (0.23 MPa). ), Isopentane (0.13 MPa) and the like. Of these, isobutane and normal butane are preferable in terms of good foaming at low temperatures, and in consideration of economic efficiency, it is particularly preferable to use normal butane and isobutane in combination. As the hydrocarbon having 5 carbon atoms, isopentane is preferable.

  Further, in order to dissolve carbon dioxide in the liquid in the pressure vessel, it is preferable to lower the vapor pressure of the hydrocarbon mixture, and it is also preferable to use isopentane in addition to the isobutane having 4 carbon atoms and normal butane. . When isopentane is used in combination, the content is preferably 0.1 to 1.8% by mass, more preferably 0.1 to 1.2% by mass, particularly 0.1% in the entire composition in the pressure vessel. -0.9 mass% is preferable from the point of the blood circulation promotion effect.

Examples of the saturated hydrocarbon having a vapor pressure at 35 ° C. higher than 0.5 MPa include propane (1.25 MPa). Usually, liquefied petroleum gas (LPG) is a mixture of propane and butane, and circulates as a mixed gas in which these ratios are adjusted according to the purpose. In the present invention, the content of hydrocarbons having a high vapor pressure at 35 ° C. is low in order to obtain a foam that can be kept on the skin for a long time by containing the carbon dioxide at a high concentration in a pressure vessel and under a low pressure. It is preferable. Propane is preferably substantially not blended, but considering industrial availability, the normal butane and / or isobutane: propane (mass ratio) contained in LPG is 70-100: 0-30. More preferably, it is 90-99.9: 0.1-10, and it is especially preferable that it is 97-99.5: 0.5-3.
As a preferable form of the hydrocarbon mixture having 3 to 5 carbon atoms, when E1 is a hydrocarbon having 5 carbon atoms, E2 is a hydrocarbon having 4 carbon atoms, and E3 is a hydrocarbon having 3 carbon atoms, E1: E2: E3 (Mass ratio) is a composition of 0 to 75:15 to 100: 0 to 30, a composition of 0 to 75:20 to 99: 0.1 to 3, particularly 0 to 50:49 to 99: 0.5 to 1. A hydrocarbon mixture of the following composition is preferred: The content of E2 is preferably 0.1 to 3% by mass, more preferably 0.1 to 2% by mass, and particularly preferably 0.3 to 1.5% by mass in the entire composition in the container.

  In this invention, although content of the said component (E) is 0.1-3 mass% in all the compositions in a container, when satisfying both the favorable foam and the blood circulation promotion effect, 0.2- 2.5 mass% is preferable, and it is especially preferable that it is 0.5-2 mass%.

  In addition, the mass ratio (D: E) of the components (D) and (E) filled in the pressure resistant container is 35:65 to 95: 5 in order to satisfy both the good foam and blood circulation promoting effect. In particular, 38:62 to 90:10 are preferable from the viewpoint of blood circulation promoting effect.

  The foamy skin coating composition of the present invention may further contain (F) trimethylglycine for foam stability, particularly for suppressing precipitation of N-acylamino acid or a salt thereof at a low temperature. Trimethylglycine is an intramolecular salt compound also called glycine betaine, and commercially available products include Aminocoat (Asahi Kasei Chemicals Corporation), BETAFIN BP (Finfeeds Finland Ltd.), and the like. The content of (F) trimethylglycine is preferably 0.1 to 20% by mass, more preferably 1 to 15% by mass, and particularly preferably 1 to 10% by mass in the total composition in the pressure vessel.

  The foamy skin coating composition of the present invention may further contain a nonionic surfactant for foam stability and foam stability. Nonionic surfactants include propylene glycol fatty acid ester, glycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyethylene glycol fatty acid ester, polyglycerin. Fatty acid ester, sucrose fatty acid ester, pentaerythritol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene castor oil, poly Oxyethylene hydrogenated castor oil, polyoxyethylene alkylamine, polyoxy Ethylene fatty acid amides, alkyl alkanolamide, alkyl glyceryl ethers, alkyl glucosides, alkyl polyglucosides, amino acid esters, modified silicones such as polyether-modified silicone, and alkyl polysaccharides, and the like. The content of the nonionic surfactant is preferably from 0.1 to 10% by mass, particularly preferably from 0.5 to 8% by mass, based on the total composition in the container.

  In addition, an anionic surfactant other than N-acylamino acid for improving foamability and detergency within the range not impairing the effects of the present invention, and alkyltrimethylammonium salt and dialkyldimethylammonium salt for enhancing foaming power , Cationic surfactants such as alkoxypropyltrimethylammonium salt and alkylbenzyldimethylammonium salt, alkyldimethylamine oxide, alkyldimethylaminoacetic acid betaine, alkylamidopropylbetaine, alkylsulfobetaine, alkylhydroxysulfobetaine, alkylcarboxymethylhydroxy Amphoteric surfactants such as ethylimidazolinium betaine can be used in combination. These surfactants are used in an amount of 0.1 to 20% by mass, more preferably 0.5 to 0.5% in the total amount of the composition in the container, in consideration of foam stability and foam feel on the skin, and irritation to the skin. It is preferable to contain 16% by mass.

  Carbon dioxide is not carbonate as carbon dioxide on the alkali side, but becomes a carbonate and does not have a blood circulation promoting effect. Therefore, the pH of the undiluted solution is preferably 2.5 to 7, particularly 4.5 to 6.5 from the viewpoint of obtaining an excellent blood circulation promoting effect by dissolving carbon dioxide at a high concentration. 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 the foam-like skin coating agent of the present invention, the viscosity of the liquid filled in the pressure resistant container holds the carbon dioxide in the foam applied on the skin in order to keep the component (E) dispersed or emulsified stably. In order to satisfy a good blood circulation promoting effect, it is preferably 100 to 500,000 mPa · s, more preferably 200 to 200,000 mPa · s, and particularly preferably 300 to 50,000 mPa · s. In particular, in order to prevent the component (E) from separating in the pressure-resistant vessel and preventing good foam from being obtained, the pressure is preferably set to 100 mPa · s or more. On the other hand, in consideration of dischargeability, foam state, and industrially stable production, when the pressure vessel is an aerosol container having a single chamber structure, it is preferably 200 to 2,000 mPa · s, and has a double structure. In the case of an aerosol container, it is preferably 1,000 to 50,000 mPa · s.

  The foamy skin coating composition of the present invention can further contain water, alcohols, oils, moisturizers, fragrances, plant extracts, bactericides / preservatives, chelating agents and the like.

  The foamy skin coating agent of the present invention fills a pressure-resistant container with a stock solution containing the components (A), (B), and (C), and further encloses (E) a hydrocarbon mixture and (D) carbon dioxide. It is manufactured by. At this time, it is also possible to fill with other injection gas as needed.

  The pressure vessel only needs to be in a form that allows the content liquid to be discharged in the form of a 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. In particular, when high pressure carbon dioxide is filled industrially once, an impact can having an aluminum container thickness adjusted is preferable. Further, depending on the viscosity of the stock solution, a double container having an inner bag in a pressure resistant container can be used. In the case of a double container, the foamy skin coating agent of the present invention is filled in an inner bag, and a spray gas is filled separately between the pressure-resistant container and the inner bag. This propellant gas can be used as long as it is a gas generally used in aerosol.

  The pressure in the pressure vessel is less than 0.7 MPa at 25 ° C., but 0.4 MPa or more and less than 0.7 MPa, further 0.45 MPa or more and less than 0.7 MPa, particularly 0.5 to 0 from the point of obtaining good foam. It is preferably .65 MPa.

  The foamy skin coating agent of the present invention is preferably used by applying on the skin and spreading the foam generated 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 foamy coating composition of the present invention is stable for a long time, and is stable even after performing an operation to spread on the skin, a light massage, etc., so high concentration carbon dioxide acts on the skin for a long time. Excellent blood circulation promoting effect.

(Measuring method)
(1) Foam stability evaluation 1 (25 ° C.)
After storage at 25 ° C. for 1 week, foam was sprayed onto the skin so as to have a diameter of 3 cmφ, and evaluation was performed by maintaining for 2 minutes.
○: Bubbles are formed and held for 2 minutes. Δ: Bubbles are formed, but they are dripped. ×: Bubbles are not formed.

(2) Foam stability evaluation 2 (5 ° C)
After storage for 6 months at a low temperature (5 ° C.), the container was taken out and returned to 25 ° C., and then foam was sprayed onto the skin so as to have a diameter of 3 cmφ, and held for 2 minutes for evaluation.
○: No separation of liquid, bubbles are formed and kept for 2 minutes. Δ: Precipitation of N-acylamino acids is observed and bubbles are easily dripped.

(3) Skin blood flow Foam was sprayed on the forearm so as to be 3 cmφ, and the foam was wiped off after being held for 2 minutes, and the skin condition (skin flush) was visually observed.
◎: Flushing is clearly recognized ○: Flushing is recognized △: Flushing is slightly recognized ×: Flushing is not recognized

(4) Viscosity The viscosity of the stock solution was measured using a BM viscometer (Toki Sangyo Co., Ltd.) at a measurement temperature of 25 ° C. The measurement was performed at 2, 30 r / min for 1 minute.

(5) pH
Using a pH meter (F-52 manufactured by Horiba, Ltd.), the measurement temperature was 25 ° C.

(6) Carbon dioxide concentration Bubbles were jetted under an atmosphere of 25 ° C., and the carbon dioxide concentration was measured. As the carbon dioxide gas measuring device, a carbon dioxide electrode model 9502BN manufactured by Orion was used.

  According to the formulation shown in Table 1, a stock solution (liquid component) was prepared, filled in a pressure vessel, and then charged in the order of hydrocarbon mixture (E) and carbon dioxide (D) to obtain an aerosol composition. About the obtained aerosol composition, 25 degreeC foam stability evaluation 1 was evaluated by the said method.

* 1: Normal butane: isobutane: propane = 71: 28: 1 mass%
* 2: Normal butane: isobutane: propane = 40: 16: 44 mass%
* 3: Amisoft CS-11 (F) (Ajinomoto Co., Inc.)
* 4: Amisoft CK-11 (F) (Ajinomoto Co., Inc.)
* 5: PEMULEN TR-1 (Lubrizol Advanced Materials, Inc.)
* 6: Carbopol 981 (Lubrizol Advanced Materials, Inc.)
* 7: Keldent (Dainippon Sumitomo Pharma Co., Ltd.)
* 8: Metroles 60SH-4000 (Shin-Etsu Chemical Co., Ltd.)
* 9: HEC Daicel SE850 (Daicel Chemical Industries, Ltd.)
* 10: Mydoll 10 (Kao Corporation)
* 11: Sunsoft M-12J (Taiyo Chemical Co., Ltd.)

  In Table 1, Examples 1 to 5 of the present invention dissolved carbon dioxide at a high concentration in an internal pressure of less than 0.7 MPa, and had good foam stability at 25 ° C. However, in Comparative Example 1 which did not contain the acrylic polymer of component (B), the liquid was separated. In Comparative Example 2 and Comparative Example 3 that did not contain the polysaccharide polymer of component (C), the foam was dripped, and the foam stability was poor. Further, a hydrocarbon mixture (Comparative Example 4) in which the proportion of saturated hydrocarbons having a vapor pressure of 0.1 MPa or more and less than 0.5 MPa at 35 ° C. contained in the component (E) is less than 70 mass% is used, and the internal pressure is further reduced to 0. When the pressure was adjusted to less than 7 MPa, the bubbles sag and the stability of the bubbles was poor.

About Examples 1, 4, and 5 of Table 1, foam stability evaluation 2 (5 degreeC) and skin flushing were evaluated, and the carbon dioxide concentration was measured (Table 2).
As a result, in Examples 1, 4 and 5 of the present invention, carbon dioxide was dissolved at a high concentration at an internal pressure of less than 0.7 MPa, skin flushing was sufficient, and foam stability at 25 ° C. Was good. On the other hand, after low-temperature long-term storage at a foam stability evaluation of 5 ° C., Example 1 containing trimethylglycine is particularly superior in terms of foam quality and liquidity as compared with Examples 4 and 5 not containing this. It was. However, there was little bubble dripping of Example 4 and 5.

  A stock solution (liquid component) was prepared according to the formulation shown in Table 3, filled in a pressure vessel, and then filled in the order of the hydrocarbon mixture (E) and carbon dioxide (D) to obtain an aerosol composition. The obtained aerosol composition was evaluated for foam stability evaluation 1 at 25 ° C and skin flushing. In Examples 6 to 10 of the present invention, carbon dioxide was dissolved at a high concentration in an internal pressure of less than 0.7 MPa, and the foam stability at 25 ° C. was good. Further, skin flushing was remarkably observed in Examples 7, 8 and Example 10 having a high carbon dioxide ratio.

* 1: Normal butane: isobutane: propane = 71: 28: 1 mass%
* 3: Amisoft CS-11 (F) (Ajinomoto Co., Inc.)
* 4: Amisoft MS-11 (Ajinomoto Co., Inc.)
* 5: Aminoformer FLDS-L (Asahi Kasei Chemicals Corporation)
* 6: Amilite ACS-12 (Ajinomoto Co., Inc.)
* 7: PEMULEN TR-1 (Lubrizol Advanced Materials, Inc.)
* 8: Carbopol 981 (Lubrizol Advanced Materials, Inc.)
* 9: Keldent (Dainippon Sumitomo Pharma Co., Ltd.)
* 10: Metroz 60SH-4000 (Shin-Etsu Chemical Co., Ltd.)
* 11: HEC Daicel SE850 (Daicel Chemical Industries, Ltd.)
* 12: Mydoll 10 (Kao Corporation)
* 13: Sunsoft M-12J (Taiyo Chemical Co., Ltd.)

Claims (7)

It is a foamy skin application agent containing the following components (A) to (E) , and 0.3 to 3 mass of hydrocarbon having 4 carbon atoms contained in the component (E) in the foamy skin application agent So that the mass ratio (D: E) between components (D) and (E) is 35:65 to 95: 5, and the internal pressure in the pressure vessel is less than 0.7 MPa at 25 ° C. A foamy skin application agent filled in
(A) N-acylamino acid or a salt thereof 0.5 to 20% by mass,
(B) (meth) acrylic acid polymer,
(C) polysaccharide polymer,
(D) carbon dioxide, and (E) a mixture selected from hydrocarbons having 3 to 5 carbon atoms, and saturated hydrocarbons having a vapor pressure of 0.1 MPa or more and less than 0.5 MPa at 35 ° C. in the mixture are 70 to Hydrocarbon mixture contained in 100% by mass 0.1-3% by mass.   Obtained by enclosing a stock solution containing components (A), (B) and (C) and components (D) and (E) so that the internal pressure in the pressure vessel is less than 0.7 MPa at 25 ° C. The foamy skin coating composition according to claim 1.   The foamy skin coating composition according to claim 1 or 2, wherein the amount of carbon dioxide dissolved in the liquid in the pressure vessel is 500 to 25,000 ppm. Furthermore, the foamy skin coating agent of any one of Claims 1-3 which contains (F) trimethylglycine in an undiluted | stock solution. The foamy skin coating agent according to any one of claims 1 to 4 , wherein the pH of the stock solution is 2.5 to 7. The foamy skin coating agent according to any one of claims 1 to 5 , wherein the viscosity of the liquid in the pressure vessel is 100 to 500,000 mPa · s. The foamy skin application agent according to any one of claims 1 to 6 , which is for use by spreading foam formed by spraying from the pressure vessel on the skin.