JP2016003197A - Emulsion composition dissolved with carbon dioxide and application of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems in which: an oil constituent with a lot of carbon dioxide gas dissolving amounts enhances capillary circulation of the skin surface by an effect of carbon dioxide gas as with carbonic water when being applied on a skin; it has been found that permeation rate of the carbon dioxide gas through the skin is slower than that of the carbonic water when judging from a degree of skin flushing phenomenon; and the permeation rate of the carbon dioxide gas is increased to be nearly the same as that of the carbonic water so as to improve characteristics as a cosmetic oil.SOLUTION: The above problem is solved by making an oil constituent into an oil-in-water type emulsion so that a phase directly contacting with a skin becomes a water phase.

Description

  The present invention relates to an oil-in-water emulsion composition in which carbon dioxide gas is dissolved at a high concentration, and is mainly used for beauty oil such as massage oil for human body.

It is known that when water in which carbon dioxide gas is dissolved at a high concentration is applied to the skin of a human body, blood circulation in capillaries near the skin surface is promoted by the action of carbon dioxide gas. Therefore, in recent years, cosmetics such as lotions and gels in which carbon dioxide is dissolved are said to have an effect on skin beauty, and various types of products have been developed and marketed. Although the detailed mechanism of the blood circulation promoting effect of carbon dioxide is not clear, the higher the concentration of carbon dioxide in the water or lotion applied to the skin surface, the more blood circulation is promoted. It is clear from the increase.

The solubility of carbon dioxide in a liquid is determined by temperature and pressure, and is listed in the chemical handbook as a physicochemical constant, but ethanol and hydrocarbons are larger than water. The inventors of the present application focused on this point and searched for a safe oil component that is a liquid having a solubility higher than that of water and that can be used safely in human cosmetics. Examining the patent documents so far, a cosmetic aerosol can technology using carbon dioxide gas as a propellant has been developed for a long time, and a technology including an oil component as a stock solution in the aerosol can is disclosed.

Patent Document 1 discloses a foam aerosol composition for human body, which discloses a composition in which an aerosol can is filled with a stock solution composed of a cream-like oil-in-water emulsion using a compressible gas such as carbon dioxide as a propellant. Yes. The action of carbon dioxide gas in this technology is to form a stable and suitable foam without being affected by the temperature of the use environment as compared with a propellant such as conventional LPG, and carbon dioxide gas to oil in the stock solution There is no mention of the dissolution of selenium or the fact that dissolved carbon dioxide promotes blood circulation in the skin and has a cosmetic effect.

Patent Document 2 discloses a technique related to a water-in-oil foam aerosol composition. This technology requires the action of carbon dioxide to maintain the stability of the oil emulsion when dimethyl ether is used as a propellant. There is no description of the dissolution of carbon dioxide in the oil or the blood circulation promoting effect of the dissolved carbon dioxide. I can't.

Patent Document 3 discloses a technique related to a foamable aerosol composition. This composition is used for cleansing agents, etc., and carbon dioxide is used as a propellant. Its action is to improve foaming and make the agent easier to blend with the skin. There is no description of the dissolution of blood and the accompanying blood circulation promoting action.

JP 2000-128773 A JP 2001-72963 A JP 2011-20929 A

The inventors of the present application have proposed whether or not carbon dioxide dissolved in oil promotes blood circulation in capillaries in the vicinity of the skin surface in the same manner as in the case of an aqueous solution when it is applied to the skin. As a result of the patch test, it was found that the phenomenon of flushing was exhibited as in the case of the aqueous solution, and the hint of the present invention was obtained.

According to the study by the present inventors, the degree of redness of the skin by the patch test is compared with water in which carbon dioxide gas is dissolved and oil. It turned out to be strong. That is, it has been found that carbon dioxide in water has a higher rate of passing through the skin and reaching the capillaries than carbon dioxide in oil. Therefore, the subject of research and development was to increase the skin permeation rate of carbon dioxide in oil to the same level as in water.

The above-described problem is a composition that exhibits a flushing phenomenon when applied to the skin of a human body, containing an oil component of 70% by mass or more, wherein an oil component and water form an oil-in-water emulsion in the presence of a surfactant, and This can be solved by preparing an emulsion composition in which carbon dioxide gas is dissolved in the emulsion. In this composition, the oil component is preferably an oil containing at least 50% by mass of one or more compounds selected from dialkyl carbonate, alkene carbonate, and silicone oil. In addition, it is preferable that these compositions are filled in an aerosol can containing carbon dioxide as a propellant. Furthermore, the use of these compositions is preferably beauty oil.

The skin permeation rate of carbon dioxide dissolved in oil was increased by the composition of the present invention, and when applied to the skin, the blood circulation of the capillaries on the skin surface was promoted in a short time. Therefore, it is expected that this composition is useful for beauty of human skin by using it as beauty oil such as massage oil.

  The inventors of the present application will move the carbon dioxide dissolved in oil at a high concentration to the aqueous phase once and bring the aqueous phase into contact with the skin surface, so that the skin permeation rate of carbon dioxide will be the same as that of carbon dioxide in water. I hypothesized that it might be. Therefore, an oil-in-water (O / W) emulsion in which oil is dispersed in water as an emulsion is devised to dissolve carbon dioxide. When this composition is applied to the skin, the liquid that comes into direct contact with the skin becomes an aqueous phase, and therefore the skin permeation rate of carbon dioxide gas is the same as that of water, and is considered to be greater than when the oil component is applied directly to the skin. It was. As shown in the examples described later, this hypothesis was brilliantly proved by experiments, and the (O / W) type emulsion in which carbon dioxide gas was dissolved showed an excellent flushing phenomenon in a short time as compared with the oil-only composition.

Adjustment of the (O / W) type emulsion can be easily adjusted by a known method by appropriately selecting a surfactant. For example, a solution is prepared by dissolving 1-2% of a surfactant in the oil component as the A component. Dispersion medium water is prepared as component B. Both the A and B solutions are heated to 60 to 80 ° C., and then the B component is added to the A component while stirring in a heated state, and the mixture is cooled to room temperature while stirring. By this operation, a stable emulsion in which the oil phase becomes fine particles and is dispersed in the aqueous phase as a dispersion medium can be obtained.

In another method, an aqueous solution in which a surfactant is dissolved is prepared as the B component, and the A component oil is added to this aqueous solution while stirring. Both components are stirred and mixed in a state heated to 60 to 80 ° C., and after mixing, the mixture is cooled while stirring to room temperature. This method is a preferable method compared to the first method in which a surfactant is added to an oil component because a surfactant is dissolved in water when a surfactant having a large HLB is used.

The confirmation that an oil-in-water (O / W) type emulsion is formed can be confirmed by observing the emulsion with a microscope or by measuring the pH of the emulsion. In the case of a water-in-oil (W / O) emulsion in which the oil component is a continuous phase and the aqueous phase is dispersed in the form of fine particles, the value varies when the pH is measured with a pH meter. In the case of the type emulsion, since the aqueous phase having a large electric conductivity is a continuous phase, the pH can be measured.

  In the present invention, carbon dioxide gas is dissolved in the (O / W) type emulsion, and the carbon dioxide gas dissolves in both the fine particle oil phase and the continuous aqueous phase according to the respective solubility. The skin permeation rate and permeation amount of carbon dioxide are considered to increase in proportion to the carbon dioxide concentration in the aqueous phase in contact with the skin. As described above, the solubility of carbon dioxide gas is greater in the oil component than in water, so that the amount of carbon dioxide dissolved increases when the content of the oil component in the emulsion is increased. Therefore, in the present invention, the content of the oil component is defined as 70% by mass or more, preferably 75% or more, more preferably 80% or more. When the content of the oil component is 90% or more, formation of an (O / W) type emulsion becomes difficult, which is not preferable.

  When the emulsion is applied to the skin surface, water phase carbon dioxide gas in contact with the skin is considered to permeate the skin. When the carbon dioxide concentration in the aqueous phase decreases due to the permeation of carbon dioxide, it is thought that carbon dioxide dissolved in the fine oil phase is supplied to the aqueous phase to compensate for the decrease in the carbon dioxide concentration in the aqueous phase. . Assuming such a mechanism, it is considered that the permeation time of carbon dioxide to the skin lasts long until the carbon dioxide concentration in the oil phase decreases. That is, it is presumed that carbon dioxide gas is supplied into the skin for a longer time than in the case of an aqueous solution alone in which carbon dioxide gas is dissolved.

The invention of the present application is an emulsion composition in which carbon dioxide gas exhibiting the flushing phenomenon is dissolved, but the patch test using carbonated water having a changed carbon dioxide gas concentration shows that the flushing phenomenon becomes more prominent as the dissolved carbon dioxide concentration increases. It has been revealed from. In addition, in blood flow measurement using a measuring device such as a laser Doppler method, an increase in blood flow in capillaries is seen from a dissolved concentration of carbon dioxide of about 400 ppm or more, but in the patch test, the flushing phenomenon cannot be clearly observed.

The flushing phenomenon is a phenomenon in which a patch site turns red in a patch test on human skin. Therefore, it is difficult to define a clear value of the carbon dioxide concentration because the concentration of carbon dioxide indicating redness varies depending on the person, but it is clearly observed in water in which carbon dioxide dissolved in at least 800 ppm or more, preferably 1000 ppm or more is dissolved. The Also in the case of the emulsion of the present invention, it is preferable that 800 ppm or more, preferably 1000 ppm or more of carbon dioxide gas is dissolved.

The oil component referred to in the present invention broadly means a liquid compound that does not dissolve in water. These oil components include triesters of fatty acids such as tri (caprylic / capric acid) glyceryl, tri (caprylic acid / capric acid / stearic acid) glyceryl, linear fatty acids such as isopropyl myristate and isopropyl palmitate and lower alcohols. Esters, esters of higher fatty acids and higher alcohols such as cetyl caprate and cetyl palmitate, mono and diesters of propylene glycol and fatty acids such as propylene glycol monocaprylate and propylene glycol dicaprylate, cetyl isooctanoate, octyl hydroxystearate, etc. Fats and oils such as ester oil, olive oil, jojoba oil, coconut oil, grape seed oil and coconut oil, hydrocarbons such as liquid paraffin and squalane, higher fatty acids such as oleic acid, cetyl alcohol and behe Alcohol, higher alcohols such as isostearyl alcohol, polydimethylsiloxane, and silicone oils such as methyl phenyl polysiloxane.

  The inventors' study has revealed that among the oil components, there are compounds having a high solubility of carbon dioxide gas. Dialkyl carbonate, alkene carbonate and silicone oil showed higher solubility than other oil components (see Example 1). Therefore, when these compounds are used as the main component of the oil component to prepare an emulsion, it is advantageous because a high concentration of carbon dioxide gas can be dissolved even with the same oil component content. The content of the main component is preferably 50% by mass or more in the oil component from the viewpoint of increasing the amount of carbon dioxide dissolved. When two or more of the above compounds are contained as the oil component, the sum of the amounts of the respective compounds is preferably 50% by mass or more.

Examples of the dialkyl carbonate include dimethyl carbonate, diethyl carbonate, diethyl hexyl carbonate, dicapryl carbonate, C14-15 dialkyl carbonate, and the like. Of these, dicapryl carbonate is often used in cosmetics and is desirable because it is highly safe even when applied to human skin. Examples of the alkene carbonate include ethylene carbonate and propylene carbonate. Propylene carbonate is also a preferred alkene carbonate because it is also used as a cosmetic ingredient.

Silicone oil is a polymer having a linear, branched, or cyclic structure having a siloxane bond and Si—O 2 in the main chain, and compounds such as methyl groups and phenyl groups in the side chain are commercially available. Specific examples include linear polydimethylsiloxane, branched polydimethylsiloxane, cyclopentasiloxane, and methylphenyl polysiloxane having different degrees of polymerization.

In order to prepare an (O / W) type emulsion with a composition having more oil components than the dispersion medium, it is preferable to use a hydrophilic surfactant having an HLB of 12 or more as the surfactant. Examples of such surfactants include PEG-40 stearate, PEG-20 sorbitan cocoate, polyglyceryl-6 laurate, ceteth-15, lanolin, polyoxyethylene (capryl / capric acid) glyceryl and polysorbate 80.

  In addition to water, the water phase is a water-soluble compound that provides functionality to cosmetics such as ascorbic acid derivatives and other whitening compounds, various plant extracts used as nutrients for skin, and humectants such as glycerin and hyaluronic acid. By adding this compound, cosmetic ingredients other than carbon dioxide can be supplied to the skin.

  Next, a method for dissolving carbon dioxide gas in an emulsion composition (hereinafter abbreviated as a stock solution) will be described. The amount of carbon dioxide dissolved in the liquid increases in proportion to the pressure of the gas phase gas according to Henry's law. Therefore, if the stock solution is placed in a pressure vessel such as an autoclave, stirred and pressurized with carbon dioxide gas, the solution dissolves to a dissolution amount determined by the temperature and pressure. In this way, the stock solution in which carbon dioxide gas is dissolved can be packed into a material that has a barrier property against carbon dioxide gas, for example, a container made of plastic film, laminate, aluminum, etc. .

In the case of an aerosol can container, the stock solution is placed in a can and pressurized to several atmospheres with carbon dioxide gas, so that the carbon dioxide gas can be dissolved in the stock solution and simultaneously used as a propellant. The production by this aerosol can method does not require a large carbon dioxide gas dissolving facility, and at the same time, since carbon dioxide is used as a propellant, the stock solution is pressurized at a high pressure of about 0.5 to 0.8 MPa. The amount increases. That is, it is an excellent method from the viewpoint of manufacturing equipment and from the viewpoint of improving the performance of products. Further, since the container is made of metal such as aluminum, the barrier property of carbon dioxide gas is sufficient, and the product is excellent as a packaging form.

However, when the carbon dioxide gas is dissolved only in the aerosol can without dissolving the carbon dioxide gas in the first stock solution, the gas phase carbon dioxide gas in the aerosol can is dissolved in the stock solution, causing a pressure drop. Therefore, it is necessary to repeat this operation until the gas is filled again and a prescribed injection pressure is reached when the pressure drops when the can is vibrated to dissolve the gas into the stock solution.

A method is also possible in which carbon dioxide gas is dissolved in a stock solution in advance using the above-described autoclave, static mixer, etc., and this stock solution is filled into an aerosol can using carbon dioxide gas as a propellant. It is also possible to fill an aerosol can with a carbon dioxide-dissolved stock solution using another compressible gas such as nitrogen or air as a propellant.

As another method of dissolving carbon dioxide gas in the emulsion, there is a method of dissolving carbon dioxide gas generated from the reaction of (bi) carbonate such as sodium hydrogen carbonate or sodium carbonate and carboxylic acid such as citric acid or malic acid. Since the emulsion of the present invention contains 30% by mass or less of water, carbon dioxide gas can be generated and simultaneously dissolved in the emulsion by reacting (bi) carbonate and acid in the aqueous phase of the emulsion.

In that case, (bi) carbonate or carboxylic acid is dissolved in the aqueous phase of the emulsion in advance, and this emulsion is put in a carbon dioxide barrier packaging container, and then acid or (bi) carbonate is added to the emulsion for packaging. The carbon dioxide generated by sealing the container can be dissolved in the emulsion without being diffused.

Alternatively, immediately before using the emulsion as a cosmetic oil, etc., an acid or (bi) carbonate is added to and mixed with an emulsion in which (bi) carbonate or carboxylic acid is dissolved in the aqueous phase in advance to generate carbon dioxide gas into the emulsion. A dissolving method is also possible. In this case, since the carbon dioxide gas is not dissolved in the emulsion composition until just before use, the packaging container for the emulsion is not necessarily gas barrier.

The emulsion composition of the present invention is suitable for use as a cosmetic oil, particularly a massage oil. Massage is performed to improve the blood circulation of the skin, and if the blood circulation promoting effect of carbon dioxide gas overlaps there, a great synergistic effect is expected in skin beauty. In the case of the (O / W) type emulsion, it is one of the features that the oil can be easily removed by washing with water after the end of the massage as compared with the massage oil having 100% oil component. The present invention will be further described below with reference to examples.

A urethane resin was injected into a bottom uneven portion of a thick PET bottle (300 ml) used for carbonated beverages and solidified to form a flat bottom. A bottle was prepared by molding a jig provided with a gas inlet and outlet as a lid for the bottle. About 30 to 60 g of a liquid such as oil was precisely weighed into this PET bottle, and the bottle was placed on a magnetic stirrer with the rotor in place. The lid was molded with resin and the gas inlet was connected to a carbon dioxide gas cylinder with a pipe.

  After purging and replacing the air above the liquid in the PET bottle with carbon dioxide, the gauge pressure is 0.1 MPa (therefore, the absolute pressure of gas phase carbon dioxide is 0.2 MPa if the atmospheric pressure is 0.1 MPa). The carbon dioxide gas was introduced into the bottle, the rotor was rotated for 30 minutes, and the liquid was stirred to dissolve the carbon dioxide gas. The amount of carbon dioxide dissolved was calculated from the change in weight before and after the carbon dioxide gas was dissolved under pressure by accurately weighing the weight of the PET bottle with the liquid covered.

In that case, the weight of carbon dioxide in the upper space of the liquid and the weight of the first air are also included in the bottle weight, so when calculating the weight of only the liquid part, the weight of the gas in these space parts is assumed to be an ideal gas. The correction was made by calculating from the gas equation of state. The value obtained by dividing the increase in the weight of the liquid by the weight of the initially charged liquid as the weight of the dissolved carbon dioxide was expressed in ppm on a mass basis. The measurement results for various oils and water for comparison are summarized in Table 1. From these results, it was found that among the oil components, dialkyl carbonate, alkene carbonate, and silicone oil have a larger amount of carbon dioxide dissolved than other oils and hydrocarbons.

  An oil (abbreviated as TSO oil) in which 50% by mass of dicapryl carbonate, 30% by mass of sugar squalane and 20% by mass of olive oil was mixed as an oil component was prepared. To 20 g of this oil, 2 g of polyglyceryl-6 laurate (HLB = 14.5) was added as a surfactant and mixed with stirring. The surfactant was not dissolved completely in the mixed oil but dispersed in the form of droplets, and this mixed solution was heated to 65 ° C. Separately, 20 g of purified water was heated to 65 ° C., added little by little to the oil mixture, and vigorously stirred with a stirrer.

When the mixture was cooled to room temperature with stirring and allowed to stand for a while, the mixture separated into an aqueous phase in the lower layer and an oil phase in the upper layer. The phase separation liquid was heated to 65 ° C. while stirring, 50 g of TSO oil separately heated to 65 ° C. was added little by little, and after stirring for a while, the white emulsion was adjusted to room temperature (this emulsion was adjusted). Let the emulsion be Sample E-1.) In addition, the content rate of the oil component of this emulsion (76/92 = 0.76) is 76 mass%.

  Carbon dioxide gas was pressurized and dissolved in TSO oil and emulsion E-1 in a PET bottle under the same conditions as in Example 1. The dissolved amount of carbon dioxide gas measured by gravimetric method was 6900 ppm for TSO oil and 6500 ppm for E-1. When the pH was measured, TSO oil fluctuated in the range of 11 to 14 and measurement was impossible, but E-1 was 6.56 when carbon dioxide was not dissolved, and 4. after carbon dioxide was dissolved. The value was 53. In order to evaluate the stability of the emulsion, the emulsion was put in a test tube and left in a 45 ° C. constant temperature bath for one month as an accelerated test. The fluidity and the presence or absence of phase separation were observed, but no change was observed. .

  The patch test was conducted using emulsion E-1 dissolved in carbon dioxide gas prepared in Example 2, TSO oil as a comparative sample, and carbonated water prepared under the same conditions as in Example 1 (carbon dioxide dissolved in purified water). The following procedure was used. First, a piece of cotton for skin application having a width of 1 cm, a length of 5 cm, and a thickness of about 3 mm was cut out from the absorbent cotton sheet for makeup removal. After each piece of cotton is dipped and lightly squeezed into the test liquid, one piece of cotton is applied to the skin surface of the inner arm of a woman (30 years old) in the width direction of the arm, and next to it, the length of the arm is about 5 mm apart. Then, the remaining two cotton pieces were applied in the same manner, and time measurement was started.

In the first patch test, the cotton pieces after 5 minutes had been applied were removed, and the liquid adhering to the skin was gently wiped with absorbent cotton and the flushing phenomenon at each patch site was observed. As a result, redness due to the flushing phenomenon was in the order of carbonated water = E-1> TSO oil. Carbonated water and E-1 were reddened almost as strongly, but the reddening of TSO oil was weaker than these.

  Subsequently, in the second patch test, a cotton piece impregnated with the test liquid was patched on one inner arm for 10 minutes in the same manner as in the first time, and the flushing phenomenon was observed in the same manner as in the first time. As a result, the 3 patch sites showed the same degree of reddening, but the extent of carbonated water and E-1 was weaker than the first 5 minute patch, and the TSO oil was stronger.

  As initially assumed from the observation of the flushing phenomenon by the patch test, the oil component is made into an O / W emulsion, so that the phase in direct contact with the skin becomes an aqueous phase. It was found that the skin permeation rate was higher than when the oil component was in direct contact with the skin. In addition, it was found that as the patch time increases, the flushing phenomenon also increases due to the skin permeation of carbon dioxide from the oil component.

  1 g of PEG-20 sorbitan cocoate (HLB = 16.9) as a surfactant was dissolved in 6.67 g of purified water. The surfactant was dissolved in purified water to become a transparent aqueous solution, and this aqueous solution was heated to 65 ° C. Separately, 40 g of the oil component TSO oil prepared in Example 2 was similarly heated to 65 ° C. and added to the aqueous solution with stirring. After completion of the addition, the mixture was stirred and mixed at 65 ° C. for a while, and then cooled to room temperature while cooling to form a white emulsion. The content of the oil component in this emulsion was 83.9% by mass and the pH was 4.16.

In the same manner as in Example 1, 30 g of this emulsion was put in a PET bottle, and carbon dioxide gas having an absolute pressure of 0.2 MPa was pressurized to dissolve the carbon dioxide gas. The amount of carbon dioxide dissolved as measured from the change in weight after 30 minutes of pressure dissolution was 6700 ppm, and the pH was 4.04. In order to investigate the reason why the pH is considerably lower than that of the emulsion E-1 of Example 2, the pH was measured by adjusting purified water in which about 5% of the surfactant was dissolved, and showed a value of 4.15. Therefore, it was estimated that the carboxylic acid group of the fatty acid remained in the surfactant without being esterified.

  In the same manner as in Example 2, 100 g of Emulsion E-1 was prepared. 50 g of this emulsion was filled into an aluminum aerosol can having an internal volume of 80 ml, sealed with a cap, and then pressurized with carbon dioxide gas through the stem. When the original pressure was set to 0.9 MPa and then the can was shaken to proceed with dissolution in the emulsion, the internal pressure of the aerosol can decreased at 0.35 MPa. When the internal pressure was measured after pressurizing with carbon dioxide gas again and vibrating, it was 0.70 MPa.

  An actuator was attached to the aerosol can, and the contents were sprayed onto a gas chromatograph (GC) measurement sample tube. A foam-like discharge with bubbles was obtained, diluted with purified water, and the concentration of carbon dioxide was measured by GC measurement. The carbon dioxide gas concentration was 3430 ppm and the pH was 4.90. In Example 2, the carbon dioxide concentration was 6500 ppm when the pressure was adjusted in the PET bottle and measured by the gravimetric method, which was considerably lower than this value. In the case of aerosol cans, the sample returned to normal pressure during sampling, so it was estimated that the carbon dioxide in the sample was partially diffused.

A patch test was conducted in the same manner as in Example 3 using an injection sample from an aerosol can and carbonated water (the carbon dioxide concentration determined by the gravimetric method was 2600 ppm). In the 5 minute patch time, both samples showed the same degree of redness. In the 10 minute patch, the redness was weaker than in the 5 minute case, and both were comparable.

According to the present invention, a composition was obtained in which carbon dioxide gas was dissolved in an emulsion in which oil components were dispersed in water. When this composition is applied to the skin of a human body, it has the property of showing a flush phenomenon similar to carbonated water in which carbon dioxide gas is dissolved in water, and is useful as a cosmetic such as beauty oil.

Examples of the dialkyl carbonate include dimethyl carbonate, diethyl carbonate, diethyl hexyl carbonate, dicapryl carbonate (the alkyl group is a C8 capryl group and is also referred to as dicaprylyl carbonate ) , C14-15 dialkyl carbonate, and the like. Of these, dicapryl carbonate is often used in cosmetics and is desirable because it is highly safe even when applied to human skin. Examples of the alkene carbonate include ethylene carbonate and propylene carbonate. Propylene carbonate is also a preferred alkene carbonate because it is also used as a cosmetic ingredient.

Claims (4)

A composition showing a flushing phenomenon when applied to the skin of a human body, comprising an oil component of 70% by mass or more, and an oil component and water forming an oil-in-water emulsion in the presence of a surfactant, and carbon dioxide gas in the emulsion An emulsion composition obtained by dissolving 2. The composition according to claim 1, wherein the oil component is an oil containing at least 50% by mass of one or more compounds selected from dialkyl carbonate, alkene carbonate, and silicone oil. The composition according to any one of claims 1 and 2, wherein the aerosol can is filled with carbon dioxide gas as a propellant. The composition according to any one of claims 1 and 2, wherein the use is cosmetic oil.