HK40085037A - Nanobubble-containing cosmetic - Google Patents

Description

Cosmetic containing nano-bubbles

Technical Field

The present invention relates to a cosmetic containing nanobubbles. More particularly, the present invention relates to a cosmetic containing a nanobubble liquid and a cosmetic ingredient.

Background

The nanobubble liquid is a liquid in which nanobubbles are dispersed in the liquid. It has been known that a cosmetic containing carbonic acid (in this specification, carbonic acid and carbon dioxide have the same meaning) produces a blood flow promoting effect when it comes into contact with the skin. Since this cosmetic requires stable blending of carbonic acid in an aqueous solution, a method of blending both preparations immediately, for example, at the time of use, has been adopted. Patent document 1 describes a liquid cosmetic in which carbonic acid is dissolved, and discloses a method for producing carbonic acid by reacting a 1 st preparation containing an acid with a 2 nd preparation containing a carbonate or a bicarbonate salt. Non-patent document 1 describes the properties of microbubbles and nanobubbles, a method for producing them, and the like.

Documents of the prior art

Patent literature

Patent document 1: japanese examined patent application laid-open No. 2016/052580

Non-patent document

Non-patent document 1: cudrania tricuspidata "foundation of micro-and nano-bubbles", japan society for sea Water, no. 64 Vol.1 P.4-10

Disclosure of Invention

Problems to be solved by the invention

As described above, patent document 1 discloses a method of reacting a 1 st formulation containing an acid with a 2 nd formulation containing a carbonate or bicarbonate to generate carbonic acid. However, in the method of preparing a cosmetic containing carbonic acid by mixing two preparations, the diameter of the air bubbles becomes large, and it is difficult to stably contain carbonic acid in an aqueous solution. Further, there is a problem that the carbonic acid-containing cosmetic cannot be stored for a long period of time. Furthermore, it is difficult to prepare cosmetics containing gases other than carbonic acid, such as hydrogen, oxygen, and air, and cosmetics containing various gases cannot be prepared by this method. Further, since two kinds of fillers are required, preparation of a cosmetic containing carbonic acid takes time, and since the 1 st and 2 nd formulations need to be separately prepared, there is a problem that the preparation process increases.

Therefore, there is a demand for a method for preparing a stable gas-containing cosmetic which can be prepared without mixing two preparations.

In order to solve the above-mentioned problems of the prior art, the present invention provides a cosmetic prepared by dispersing nano-bubble-state bubbles of carbonic acid, hydrogen gas, oxygen gas, air, etc. having a diameter of 5nm to 500nm in a liquid medium. According to the present invention, since the gas contained in the nanobubble liquid is microbubbles, the cosmetic can stably contain the gas and the problem of gas loss can be prevented for a long time, and a method for producing the same can be provided.

Means for solving the problems

One aspect of the present invention provides a cosmetic composition comprising a nanobubble liquid which is a nanobubble liquid containing a liquid medium and bubbles, and a cosmetic component, wherein the bubbles have a diameter in the range of 5nm to 500 nm.

The cosmetic according to the present invention, wherein the liquid medium is one or more liquid media selected from the group consisting of water and ethanol.

The cosmetic according to the present invention, wherein the nano-bubbles are nano-bubbles made with one or more gases selected from the group consisting of hydrogen, oxygen, carbon dioxide and air.

The cosmetic according to the present invention, wherein the cosmetic is a skin care cosmetic or a hair care cosmetic.

The cosmetic according to the present invention is a cosmetic for promoting blood flow.

Another aspect of the present invention provides a method for preparing a cosmetic, comprising a process a of supplying a gas to a liquid medium to obtain a nanobubble liquid having a diameter of 5nm to 500nm, and a process b of blending a cosmetic ingredient in the liquid medium, wherein the processes a and b are performed in an arbitrary order or simultaneously.

The method for preparing a cosmetic according to the present invention may further include adding one or more additives selected from the group consisting of water and ethanol to the liquid medium.

The method for preparing a cosmetic according to the present invention, wherein the nanobubbles are nanobubbles made of one or more gases selected from the group consisting of hydrogen, oxygen, carbon dioxide and air.

The method for producing a cosmetic according to the present invention, wherein the cosmetic is a skin care cosmetic or a hair care cosmetic.

The method for producing a cosmetic according to the present invention is a cosmetic for promoting blood flow.

ADVANTAGEOUS EFFECTS OF INVENTION

The cosmetic of the present invention contains a nanobubble liquid which is a nanobubble liquid containing a liquid medium and bubbles having a diameter in the range of 5nm to 500nm, and a cosmetic component, and therefore, the nanobubble liquid can stably contain a gas, and a cosmetic free from the problem of gas loss over a long period of time can be provided. Further, the nano bubbles are easily penetrated into the skin, and have a blood flow promoting effect, and a cosmetic user can get a warm feeling after using the cosmetic. In addition, the cosmetic has moisture-retaining effect, and the user of the cosmetic can make the skin feel moist after using the cosmetic.

In the cosmetic of the present invention, the liquid medium is one or more liquid media selected from the group consisting of water and ethanol, and thus the liquid medium can be set within this range, and a suitable cosmetic meeting the needs of a cosmetic user can be provided.

In the cosmetic of the present invention, the nanobubble liquid is in a state of nanobubbles containing one or more gases selected from the group consisting of hydrogen, oxygen, carbon dioxide and air, and the gas can be selected within this range, and a cosmetic in which an appropriate gas is selected based on the needs of a cosmetic user can be provided.

The cosmetic of the present invention is a skin care cosmetic or a hair care cosmetic, and can be prepared in an appropriate form depending on the use of the user of the cosmetic.

The cosmetic of the present invention is a cosmetic for promoting blood flow, and a user of the cosmetic can obtain a warm feeling after using the cosmetic, and can provide a cosmetic having a better health effect.

The method for producing a cosmetic of the present invention comprises a process a for supplying a gas to a liquid medium to obtain a nanobubble liquid having a diameter of 5nm to 500nm, and a process b for blending a cosmetic component in the liquid medium, wherein the processes a and b are performed in any order or simultaneously, so that the nanobubble liquid can stably contain the gas, and a cosmetic free from the problem of gas loss can be provided for a long period of time. Further, the nano bubbles easily permeate into the skin, thus having a blood flow promoting effect, and a user of the cosmetic can obtain a warm feeling after using the cosmetic. The cosmetic has moisturizing effect, and can provide cosmetic users with skin moistening effect.

Further, the processes a and b may be performed in any order or simultaneously, and an appropriate preparation method may be selected for the case of cosmetics.

In the cosmetic of the present invention, the liquid medium is one or more liquid media selected from the group consisting of water and ethanol, and thus the liquid medium can be set within this range, and a suitable cosmetic can be provided according to the situation of a user of the cosmetic.

In the cosmetic of the present invention, the nanobubble liquid is in a state of nanobubbles containing one or more gases selected from the group consisting of hydrogen, oxygen, carbon dioxide and air, and thus the gas can be selected within this range, and a cosmetic selected with an appropriate gas can be provided according to the situation of a cosmetic user.

The cosmetic of the present invention is a skin care cosmetic or a hair care cosmetic, and thus can be prepared in an appropriate form according to the use of the user of the cosmetic.

The cosmetic of the present invention is a cosmetic for promoting blood flow, and therefore, a cosmetic user can obtain a warm feeling after using the cosmetic, and a cosmetic having a better health effect can be provided.

Detailed Description

Hereinafter, preferred embodiments of the cosmetic containing nanobubbles of the present invention (hereinafter, simply referred to as "cosmetic") will be described.

The cosmetic of the present invention comprises a nanobubble liquid and a cosmetic ingredient.

Nanobubbles are a generic term for microbubbles in a liquid (mainly water), referring to bubbles with a diameter of less than 1 μm. Further, nanobubbles are sometimes referred to as ultra-fine bubbles.

The fine bubbles are bubbles having a diameter of 100 μm or less, and are divided into microbubbles and nanobubbles (ultra-fine bubbles). The diameter of the microbubbles is in the range of 1 μm to 100 μm, and as described above, the diameter of the bubbles is less than 1 μm.

The liquid medium is the medium used for the aeration. Further, the solvent may be a medium for dissolving or dispersing other components. As the liquid medium, for example, water, ethanol to which a perfume is added, modified ethanol, or the like can be used, but the liquid medium is not limited thereto, and a liquid medium known to those skilled in the art can be used, and the liquid medium may be used in combination. As water used for the liquid medium, for example, ordinary water, purified water, distilled water, sterile water, saline, physiological saline, or the like can be used, but not limited thereto. When the liquid medium is water, the cosmetic which is comfortable for users can be obtained.

The nanobubble liquid is a liquid in which nanobubbles are dispersed in the liquid. In the nanobubble liquid, any diameter of the bubbles may be used as long as the diameter of the bubbles is less than 1 μm.

In the nanobubble liquid of the present invention, the diameter of the bubbles is preferably in the range of 5nm to 500nm, and more preferably in the range of 50nm to 500 nm. The average diameter of the bubbles is preferably in the range of 80nm to 140 nm. Further, the lower limit value may be 0.1nm, 1nm, 3nm, or may be a value therebetween. When the diameter of the bubble is larger than 500nm, the diameter of the bubble is large, and the gas escapes from the solution.

The nanobubbles contained in the nanobubble liquid may be any gas, but hydrogen, oxygen, carbon dioxide and air are preferably used. These gases easily permeate into the skin, and can bring about a blood flow promoting effect to the cosmetic.

The cosmetic ingredients of the present invention include moisturizers (emollients and emollients), astringents (antiperspirants), cooling agents, whitening agents, ultraviolet absorbers, and other agents. Examples of the humectant include diglycerin, dipropylene glycol, a mixed solution of glycosyl trehalose and hydrogenated starch degradation products, 1, 2-pentanediol, 1, 2-hexanediol, propylene glycol, maltitol, sorbitol, glucose, xylitol, 1, 2-octanediol, ethylhexyl glycerin, sodium hyaluronate acylate, hydrolyzed hyaluronic acid, hydroxypropyltrimethylammonium hyaluronate, mineral oil, jojoba oil, isopropyl palmitate, isopropyl myristate, glycerol tri (caprylic/capric acid), cetyl ethylhexanoate, olive oil, rice bran oil, squalane, polymethylsiloxane, decamethylcyclopentasiloxane, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, behenyl alcohol, stearyl alcohol, cetyl alcohol, hydrogenated rapeseed oleyl alcohol, batyl alcohol, arachidyl alcohol, and cetylstearyl alcohol. Examples of the astringent include citric acid, lactic acid, aluminum sulfate, lemon water, and witch hazel. Examples of the refreshing agent include menthol, ethanol, camphor, eucalyptus oil, and the like. Examples of the whitening agent include arbutin, tranexamic acid, and retinol. Examples of the ultraviolet absorber include PABA, t-butyl methoxydibenzoylmethane, oxybenzone-1, oxybenzone-2, oxybenzone-3, oxybenzone-4, oxybenzone-5, oxybenzone-6, oxybenzone-9, poly-silicon-15, ethylhexyl methoxycinnamate, diethylamino hydroxybenzoyl hexyl benzoate, and bis (ethylhexyloxyphenol) methoxyphenyl triazine. Examples of the other agents include acne agents, dandruff pruritus agents, bromhidrosis preventing agents, anti-inflammatory agents (such as dipotassium glycyrrhizinate), bactericides, nutrients, active agents, and agents for enhancing physiological functions of the body. The invention is not limited to these examples and components known to those skilled in the art may be used.

The cosmetic of the present invention may further contain additives, plant extracts and thickeners. Examples of the type of the additive include a preservative, an antioxidant, a metal-blocking agent (metal ion element-blocking agent), a discoloration inhibitor, and a buffer.

The additive of the present invention is not particularly limited, and for example, silver oxide, paraben (benzoate), sorbic acid, sodium dehydroacetate, quaternary ammonium salts (benzalkonium chloride, benzethonium chloride), chlorhexidine, pentanediol, phenoxyethanol, tocopherol (vitamin E), ascorbic acid, dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA), and chelating agents (sodium edetate, ethylenediaminetetraacetate (EDTA), citric acid, and the like) can be used as the preservative.

In addition, the cosmetic of the present invention preferably uses a vitamin extract and an animal extract (collagen), which can provide excellent blood flow promoting effect and moisturizing effect to the cosmetic.

The cosmetic can be prepared into skin care cosmetics such as astringent, beauty lotion, gel, cream, facial cleanser or emulsion. Further, it can be formulated into hair care products such as shampoo, hair cream, hair conditioner, hair mask, hair tonic, etc. Thus, cosmetics of appropriate form can be prepared according to the use of the user of the cosmetics. Also, the cosmetic is preferably a lotion. The lotion contains water as main component, has low viscosity, and can prevent gas in the nanometer bubble liquid from escaping. This makes it possible to use the cosmetic liquid as a cosmetic liquid having an excellent blood flow promoting effect.

As described above, the cosmetic of the present invention contains the nanobubble liquid, and the nanobubbles easily penetrate into the skin, thereby having a blood flow promoting effect. Therefore, it can be used as a cosmetic having a blood flow promoting effect. Thereby, the user of the cosmetic can obtain a warm feeling after using the cosmetic. In addition, the cosmetic has moisture-retaining effect, and the user of the cosmetic can make the skin feel moist after using the cosmetic. Moreover, the user of the cosmetic can make the skin smooth after using the cosmetic, and can generate a moist skin feeling.

The method for preparing a cosmetic of the present invention comprises a process a for obtaining a nanobubble liquid having a diameter of 5nm to 500nm by supplying a gas to a liquid medium, and a process b for blending a cosmetic ingredient in the liquid medium, wherein the processes a and b are performed in any order or simultaneously.

In the process a, the gas is supplied to the liquid medium to obtain the nano bubble liquid with the diameter of the bubble in the range of 5nm to 500 nm.

The liquid medium may be the above-mentioned medium, and for example, water, ethanol, or the like may be used. When the liquid medium is water, a cosmetic which can be comfortably used by a user of the cosmetic can be obtained.

As the method of supplying the gas, any method capable of obtaining a nanobubble liquid may be used, but a nanobubble generator is preferably used. For example, a nano bubble generator manufactured by the ultra-fine science research may be used as the nano bubble generator, but the present invention is not limited thereto. Further, the rate of supplying the gas is not particularly limited.

In process b, the cosmetic ingredients are formulated in a liquid medium. The cosmetic ingredients may be the above-mentioned ones.

In the method for producing a cosmetic of the present invention, since the processes a and b are performed in an arbitrary order or simultaneously, the following modes of operation are possible.

The cosmetic composition is prepared by adding a cosmetic component to a nanobubble liquid obtained by supplying a gas to a liquid medium (in the order of process a and process b).

After the cosmetic ingredients are mixed in the liquid medium, a gas is supplied to obtain a nanobubble liquid, and then a cosmetic is obtained (in the order of process b and process a).

The gas is supplied to the liquid medium and the cosmetic ingredients, and the mixture is simultaneously formulated to obtain the cosmetic (process a and process b are simultaneously performed).

As the gas to be supplied, a gas known to those skilled in the art can be used, but hydrogen, oxygen, carbon dioxide and air are preferably used. These gases easily permeate into the skin, and can bring about a blood flow promoting effect to the cosmetic.

The cosmetic prepared by the above preparation method can be made into skin care products such as cosmetic water, essence, gel, cream, facial cleanser or lotion. Further, it can be formulated into hair care products such as shampoo, hair cream, hair conditioner, hair mask, hair tonic, etc. Thus, cosmetics of appropriate shapes can be provided depending on the use of the user of the cosmetics. Also, the cosmetic is preferably a lotion. The essential component of the lotion is water, the viscosity is low, and the gas in the nano bubble liquid can not escape. Thus, a cosmetic liquid having an excellent blood flow promoting effect can be prepared.

The cosmetic prepared by the above preparation method comprises nanometer bubble solution, and nanometer bubbles can easily penetrate into skin, thereby having blood flow promoting effect. Therefore, cosmetics for promoting blood flow can be prepared. Also, the cosmetic has a moisturizing effect, and a user of the cosmetic can give a moist feeling to the skin after using the cosmetic. Furthermore, the cosmetic user can smooth the skin after using the cosmetic, and can produce a moist skin feeling.

Examples

Hereinafter, examples of the cosmetic of the present invention will be described to further explain the effects of the present invention, but the present invention is not limited to the following examples.

Example 1

The nanobubble solution was prepared by introducing hydrogen gas into purified water using a nanobubble generator (ultra-fine scientific research). Next, the nanobubble liquid and the cosmetic ingredient were mixed at the ratio shown in Table 1 to prepare a nanobubble liquid (hereinafter referred to as "example 1"). The preparation and effect of the cosmetic were confirmed by the following methods. After 2g of a hydrogen-containing cosmetic prepared by dispersing a gas having a nanometer size in water was applied to the finger of the subject, the blood flow promotion and the telangiectasia were observed by a capillary microscope (model No. SC10-750, manufactured by Vasculus beauty Co., ltd.), and the difference in the thickness of the blood vessel before and after telangiectasia was measured. Then, a sensory test was performed to determine whether there was a difference in the sensation at the application site of the subject after applying 5g of the cosmetic to the entire back of the hand, and the usability and the sensation in use of the cosmetic were evaluated and the bubble state at one month from the preparation of the cosmetic was confirmed.

TABLE 1

Example 2

The nanobubble solution was prepared by introducing carbon dioxide gas into purified water using a nanobubble generator (ultra-fine scientific research). Next, the nanobubble liquid and the cosmetic ingredients were mixed at the ratio shown in Table 2 to prepare a mixture (hereinafter, referred to as "example 2"). The preparation and effect of the cosmetic were confirmed by the following methods. After 2g of a carbon dioxide-containing cosmetic in which a gas having a nanometer size was dispersed in water was applied to the fingers of the subject, the blood flow promotion and the expansion of the capillaries were observed with a capillary microscope (model No. SC10-750, manufactured by angio americans corporation), and the difference in the thickness of the blood vessels before and after the expansion of the capillaries was measured. Further, a sensory test was conducted to determine whether the applied part of the subject had a difference in sensation after applying 5g of the cosmetic to the entire back of the hand, and the usability and the feeling of use of the cosmetic were evaluated, and the state of air bubbles was confirmed one month after the preparation of the cosmetic.

TABLE 2

Example 3

The nanobubble solution was prepared by introducing oxygen into purified water using a nanobubble generator (ultra-fine scientific research). Next, the nanobubble liquid and the cosmetic ingredient were mixed at the ratio shown in Table 3 to prepare a nanobubble liquid (hereinafter referred to as "example 3"). The preparation and effect of the cosmetic were confirmed by the following methods. After 2g of an oxygen-containing cosmetic prepared by dispersing nano-sized gas in water was applied to the finger of the subject, the blood flow promotion and the telangiectasia were observed with a capillary microscope (model SC10-750, manufactured by Vasculus beauty Co., ltd.), and the difference in the thickness of the blood vessel before and after telangiectasia was measured. Then, a sensory test was performed to determine whether there was a difference in the sensation at the application site of the subject after applying 5g of the cosmetic to the entire back of the hand, and the usability and the sensation in use of the cosmetic were evaluated and the bubble state at one month from the preparation of the cosmetic was confirmed.

TABLE 3

Comparative example 1

A blank solution (hereinafter, referred to as "comparative example 1") was prepared by using purified water instead of the nanobubble solution. The preparation and effect of the cosmetic were confirmed by the following methods. After 2g of the blank solution was applied to the finger of the subject, the blood flow promotion and the expansion of the capillary vessel were observed by a capillary microscope (product model SC10-750, manufactured by Vasculus beauty Co., ltd.), and the difference in the thickness of the blood vessel before and after the expansion of the capillary vessel was measured. Further, a sensory test was conducted to determine whether there was a difference in the sensation at the application site of the subject after applying 5g of the blank solution to the entire back of the hand, and the usability and the feeling of use of the cosmetic were evaluated, and the bubble state at one month after the preparation of the cosmetic was confirmed.

Comparative example 2

The resulting mixture was mixed in the proportions shown in Table 4 to prepare a mixture (hereinafter, referred to as "comparative example 2"). The preparation of the cosmetic is carried out by mixing the two preparations by the existing method. The effects of the cosmetics were confirmed by the following methods. After applying 2g of a carbon dioxide-containing cosmetic having gas dispersed in water to the fingers of the subject, the blood flow promotion and the expansion of the capillary vessels were observed with a capillary microscope (model SC10-750, manufactured by Vasculus beauty Co., ltd.), and the difference in the thickness of the blood vessels before and after the expansion of the capillary vessels was measured. Further, a sensory test was conducted to determine whether the applied part of the subject had a difference in sensation after applying 5g of the cosmetic to the entire back of the hand, and the usability and the feeling of use of the cosmetic were evaluated, and the state of air bubbles was confirmed one month after the preparation of the cosmetic.

TABLE 4

Comparative example 3

The millimeter bubble liquid was prepared by introducing hydrogen gas into purified water using a compressed gas cylinder. Next, a millimeter bubble liquid and a cosmetic ingredient were mixed at the compounding ratio shown in Table 5 to prepare a millimeter bubble liquid (hereinafter referred to as "comparative example 3"). The preparation and effect of the cosmetic were confirmed by the following methods. After applying 2g of a hydrogen-containing cosmetic having a gas dispersed in water to the fingers of the subject, the blood flow acceleration and the expansion of the capillaries were observed with a capillary microscope (model No. SC10-750, manufactured by Vasculus beauty Co., ltd.), and the difference in the thickness of the blood vessel before and after the expansion of the capillaries was measured. Further, a sensory test was conducted to determine whether the applied part of the subject had a difference in sensation after applying 5g of the cosmetic to the entire back of the hand, and the usability and the feeling of use of the cosmetic were evaluated, and the state of air bubbles was confirmed one month after the preparation of the cosmetic.

TABLE 5

Comparative example 4

The millimeter bubble liquid was prepared by introducing carbon dioxide gas into purified water using a compressed gas cylinder. Next, a millimeter bubble solution and a cosmetic component (hereinafter, referred to as "comparative example 4") were mixed at the formulation shown in table 6. The preparation and effect of the cosmetic were confirmed by the following methods. After 2g of a carbon dioxide-containing cosmetic having a gas dispersed in water was applied to the fingers of the subject, the acceleration of blood flow and the expansion of capillary vessels were observed with a capillary microscope (model No. SC10-750, manufactured by Vascule GmbH), and the difference in blood vessel thickness between before and after the expansion of capillary vessels was measured. Further, a sensory test was conducted to determine whether the applied part of the subject had a difference in sensation after applying 5g of the cosmetic to the entire back of the hand, and the usability and the feeling of use of the cosmetic were evaluated, and the state of air bubbles was confirmed one month after the preparation of the cosmetic.

TABLE 6

Comparative example 5

The millimeter bubble liquid was prepared by introducing oxygen gas into purified water using a compressed gas cylinder. Next, a millimeter bubble solution and a cosmetic ingredient were mixed at the compounding ratio shown in Table 7 to prepare a millimeter bubble solution (hereinafter referred to as "comparative example 5"). The preparation and effect of the cosmetic were confirmed by the following methods. After applying 2g of an oxygen-containing cosmetic having a gas dispersed in water to the fingers of the subject, the blood flow promotion and the expansion of the capillaries were observed with a capillary microscope (model No. SC10-750, manufactured by Vasculus beauty Co., ltd.), and the difference in the thickness of the blood vessel before and after the expansion of the capillaries was measured. Then, a sensory test was performed to determine whether there was a difference in the sensation at the application site of the subject after applying 5g of the cosmetic to the entire back of the hand, and the usability and the sensation in use of the cosmetic were evaluated and the bubble state at one month from the preparation of the cosmetic was confirmed.

TABLE 7

After applying the cosmetic to the fingers of the subjects, the expansion of the capillaries was observed with a capillary microscope (model No. SC10-750, manufactured by angio americans corporation), and the blood flow promoting effect was measured according to the judgment criteria in table 8.

TABLE 8

The diameter of the bubble was measured by using NanoSight LM10V-HS manufactured by Malvern, UK.

After applying the cosmetic to the entire back of the hand of the subject, sensory tests were performed to determine whether there was a difference in sensation between the applied parts of the subject according to the criteria in table 9.

TABLE 9

The bubble state at one month after the preparation of the cosmetics was evaluated according to the judgment criteria in table 10 by allowing each cosmetic to stand at room temperature for 1 month after the preparation, irradiating the cosmetic contained in the glass container with light, and then visually checking the bubble state. The state of the bubbles may be evaluated by other measurement methods, for example, by measuring the number of bubbles in the cosmetic and comparing the measured values.

TABLE 10

The test results of the cosmetics of examples 1 to 3 and comparative examples 1 to 5 shown in table 11 are discussed below.

In examples 1 to 3, the differences in blood vessel thickness before and after telangiectasia were 0.7mm, 0.5mm and 0.3mm, and a significant increase was exhibited. On the other hand, in comparative example 1 in which purified water was used as a blank, the difference in blood vessel thickness between before and after telangiectasia was 0.1mm or less, and no change was observed. From this, it is understood that the cosmetics containing nanobubbles of examples 1 to 3 have the blood flow promoting effect.

In comparative example 2, a cosmetic containing carbonic acid was prepared by mixing two preparations according to a conventional method. When the effect of the cosmetic was confirmed, the difference in the thickness of the blood vessel between before and after telangiectasia was 0.6mm, and it was found that the cosmetic containing carbonic acid of comparative example 2 had the effect of promoting blood flow.

In comparative examples 3 to 5, cosmetics containing gas were prepared by introducing gas into purified water using a compressed gas cylinder. When the effect of the cosmetic was confirmed, the difference in the thickness of the blood vessel before and after telangiectasia was 0.1mm or less, and it was found that the cosmetics of comparative examples 3 to 5 had no blood flow promoting effect. Further, it is understood that the cosmetics containing the nano-bubble liquid have the blood flow promoting effect, since the diameters of the air bubbles contained in the cosmetics of examples 1 to 3 are in the range of 5nm to 500nm, and the diameters of the air bubbles contained in the cosmetics of comparative examples 3 to 5 are in the range of 1mm to 30 mm. On the other hand, as shown in comparative example 2, it was found that even when the diameter of the bubble is in the range of 1mm to 7.5mm, the cosmetic product exhibits a blood flow promoting effect when a bubble liquid prepared immediately after use is used.

Further, the state of bubbles was confirmed one month after the preparation of the cosmetic. It was found that the cosmetics containing nano-bubbles of examples 1 to 3 contained enough bubbles even after one month from the preparation of the cosmetics. From the results, it is understood that the cosmetics containing nano-bubbles of examples 1 to 3 are cosmetics which do not cause a problem of gas escape for a long period of time. On the other hand, it is clear that the cosmetics of comparative examples 1 to 5 contain no air bubbles at all one month after the preparation of the cosmetics. It is understood from this that the diameters of the bubbles contained in the cosmetics of comparative examples 1 to 5 are large, and thus the gas rapidly escapes from the cosmetics. Further, it is found that the cosmetics containing nanobubbles of examples 1 to 3 are excellent in long-term storage stability as compared with the cosmetics of comparative examples 1 to 5.

Study on the results

The cosmetics containing nano bubbles of examples 1 to 3 were easily prepared, compared to the cosmetic containing carbonic acid of comparative example 2 prepared by mixing two preparations according to the conventional method. Furthermore, the gas may be selected from the group consisting of hydrogen, carbonic acid and oxygen, so that cosmetics may be prepared according to the needs of the user of the cosmetics. Further, since the nano bubble-containing cosmetic uses the nano bubble liquid having small diameters of the bubbles, the gas is less likely to escape as compared with the cosmetic containing carbonic acid of comparative example 2, and the cosmetic in which the problem of gas escape does not occur for a long time can be provided. In comparative example 2, both preparations were mixed and immediately used as cosmetics, which is poor in usability as cosmetics. Therefore, the cosmetics containing nano bubbles of examples 1 to 3 are also superior to the cosmetics of comparative example 2 in the usability of the cosmetics.

Industrial applicability

The cosmetic of the present invention contains a nanobubble liquid which is a nanobubble solution containing a liquid medium and bubbles having a diameter in the range of 5nm to 500nm, and a cosmetic ingredient, and therefore, the liquid medium and the nanobubble liquid can stably contain a gas, and a cosmetic free from the problem of gas escape over a long period of time can be provided. Further, the nano bubbles are easily penetrated into the skin, and thus have a blood flow promoting effect, and a user of the cosmetics can obtain a warm feeling after using the cosmetics. In addition, the cosmetic has moisture-keeping effect, and the user of the cosmetic can make the skin moist after using the cosmetic. Furthermore, the diameter of the bubbles is in the range of 5nm to 500nm, and a cosmetic free from a problem of gas escape for a longer period of time can be provided.

Therefore, the cosmetic of the present invention is suitable for wide use as a cosmetic which does not cause a problem of gas escape for a long period of time and has a blood flow promoting effect.

Claims (10)

1. A cosmetic comprising a nanobubble liquid which is a nanobubble solution containing a liquid medium and bubbles, and a cosmetic ingredient,

the diameter of the bubbles is in the range of 5nm to 500 nm.

2. The cosmetic according to claim 1, wherein the liquid medium is one or more liquid media selected from the group consisting of water and ethanol.

3. The cosmetic according to claim 1 or 2, wherein the nanobubble liquid is in a state of nanobubbles containing one or more gases selected from the group consisting of hydrogen, oxygen, carbon dioxide and air.

4. The cosmetic according to any one of claims 1 to 3, wherein the cosmetic is a skin care cosmetic or a hair care cosmetic.

5. The cosmetic according to any one of claims 1 to 4, wherein the cosmetic is a cosmetic for promoting blood flow.

6. A method for producing a cosmetic, characterized by comprising a step (a) of supplying a gas to a liquid medium to obtain a nanobubble liquid having a diameter of 5 to 500nm, and a step (b) of blending a cosmetic component in the liquid medium, wherein the steps (a) and (b) are carried out in any order or simultaneously.

7. The method for preparing a cosmetic according to claim 6, wherein the liquid medium is one or more liquid media selected from the group consisting of water and ethanol.

8. The method for preparing a cosmetic according to claim 6 or 7, wherein the nano-bubbles are nano-bubbles made of one or more gases selected from the group consisting of hydrogen, oxygen, carbon dioxide and air.

9. The method for producing a cosmetic according to any one of claims 6 to 8, wherein the cosmetic is a skin-care cosmetic or a hair-care cosmetic.

10. The method for producing a cosmetic according to any one of claims 6 to 9, wherein the cosmetic is a cosmetic for promoting blood flow.