Cosmetics containing microbubbles

Abstract

The present invention provides a cosmetic composition that can retain finely bubbled carbon dioxide for an extended period of time and can be easily used by general consumers. [Solution] A cosmetic composition containing fine bubbles, prepared by passing a multiphase flow of water or a water-containing liquid and carbon dioxide through a cavitation-type liquid processing nozzle, has carbon dioxide that is stably retained in the composition over a long period of time.

Description

Technical Field

[0001] The present invention relates to a cosmetic containing fine bubbles. Specifically, it relates to a cosmetic in which carbon dioxide gas is stably retained for a long time in the composition and a method for producing the same.

Background Art

[0002] Carbon dioxide gas is known to have a blood flow promoting effect and is used for cosmetics for the body, hair, etc. for cosmetic purposes. However, since the amount of carbon dioxide gas dissolved in water is very small, it is very difficult to stably retain carbon dioxide gas in water or an aqueous solution for a long time.

[0003] Conventionally, as a composition containing carbon dioxide gas, for example, in [Patent Document 1], a basic composition containing water, a thickening agent, and a carbonate, and at least 10% or more of an acid with respect to the number of moles of the carbonate contained in the basic composition. A production kit for a composition for percutaneous and transmucosal absorption of carbon dioxide gas, which consists of a carbon dioxide generation assisting agent (I) and is obtained by mixing these at the time of use, is disclosed. Further, in [Patent Document 2], a cosmetic containing nanobubbles prepared by a nanobubble generator (manufactured by Ultra Fine Science Research Institute Co., Ltd.) is disclosed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the manufacturing kit disclosed in [Patent Document 1] requires mixing the basic composition with the carbon dioxide generation aid (I) before use, making it time-consuming and cumbersome to prepare the composition for transdermal and transmucosal absorption of carbon dioxide, and thus making it difficult for general consumers to use easily. Furthermore, while the cosmetic composition disclosed in [Patent Document 2] shows visible bubbles remaining one month after preparation, it does not disclose how many bubbles (gas concentration) remain after longer periods, and therefore remains unknown.

[0006] The present invention aims to provide a cosmetic composition that can retain microbubbled carbon dioxide for a long period of time and can be easily used by general consumers. [Means for solving the problem]

[0007] The inventors conducted studies to solve the above problems. The inventors found that a cosmetic composition containing microbubbles, prepared by passing a multiphase flow of water or a water-containing liquid and carbon dioxide through a cavitation-type liquid processing nozzle (a method in which a venturi or orifice is provided in the water flow path, and dissolved air is precipitated as microbubbles due to the reduced pressure effect resulting from Verzoui's theorem when the water passes through at high velocity), maintains carbon dioxide in a long-term stable state. In particular, the inventors found that a cosmetic composition containing microbubbles, prepared by passing a multiphase flow of water or a water-containing liquid and carbon dioxide through a liquid processing nozzle manufactured by Water Design Co., Ltd., maintains carbon dioxide in a long-term stable state in a remarkably high degree. Microbubbles with a diameter of less than 100 μm are called "fine bubbles," and "fine bubbles" are classified into "microbubbles (1 to less than 100 μm)" and "ultrafine bubbles (less than 1 μm)" depending on the difference in bubble diameter. Furthermore, it is known that when there are many microbubbles in water, the water appears cloudy, while ultrafine bubbles appear transparent.

[0008] The present invention provides the following cosmetic composition.

[0009] Item 1. A cosmetic composition containing fine bubbles prepared by passing a multiphase flow of water or a water-containing liquid and carbon dioxide through a cavitation-type liquid processing nozzle.

[0010] Item 2. The cosmetic composition according to claim 1, wherein the cavitation-type liquid processing nozzle is a liquid processing nozzle manufactured by Water Design Co., Ltd.

[0011] [Effects of the Invention]

[0012] The cosmetic composition of the present invention can retain finely bubbled carbon dioxide gas in the composition for a long period of time and can be easily used by general consumers. [Brief explanation of the drawing]

[0013] [Figure 1] This figure shows a cross-sectional view of one embodiment of a liquid processing nozzle used in the present invention, along with an enlarged view taken along arrow A. [Figure 2] Figure 1 is a cross-sectional view showing the details of the processing core section of the liquid processing nozzle. [Figure 3] This is an enlarged view that shows the actual arrangement of the screw members that form the collision point in one of the aperture holes in Figure 2. [Modes for carrying out the invention]

[0014] The cosmetic composition of the present invention is prepared by passing a multiphase flow of at least one of water or a water-containing liquid (including liquid cosmetic composition) and carbon dioxide through a cavitation-type liquid processing nozzle, and contains fine bubbles of carbon dioxide.

[0015] The liquid processing nozzle used in this invention is not particularly limited as long as it is a cavitation type liquid processing nozzle that can produce fine bubbles, but it is preferable to use the liquid processing nozzle manufactured by Water Design Co., Ltd. disclosed under international publication number (WO2016 / 178436). This nozzle comprises a nozzle body in which a liquid flow path is formed, a partition wall that divides the liquid flow path into an inlet chamber on the liquid inlet side and an outlet chamber on the liquid outlet side, a plurality of throttling holes formed through the partition wall that connect the inlet chamber and the outlet chamber to each other via separate paths, and a processing core consisting of impact parts that protrude from the inner surface of the throttling holes and have a plurality of alternating circumferential peaks and valleys that become high flow velocity sections on their outer surface. By supplying a liquid containing dissolved gas into the liquid flow path and causing the liquid to collide with the impact parts, fine bubbles are generated by the reduced-pressure boiling effect when the liquid speed increases within the valleys. Furthermore, the aperture holes are characterized in that the aperture hole aspect ratio, defined as L / de, where de is the diameter of a circle equivalent to the sum of the axial cross-sectional areas of the aperture holes and L is the length of the aperture hole, is set to 3.5 or less, and in projection onto a plane perpendicular to the axis of the nozzle body, the aperture holes are arranged so that the distance T from a reference point determined at the center of the projection area of ​​the partition wall to the inner edge of the multiple aperture holes is smaller than the inner diameter d of the aperture hole. Furthermore, the liquid processing nozzle used in this invention may be modified by altering a part of the liquid processing nozzle to suit the desired dosage form and function.

[0016] The liquid treatment method of the present invention supplies liquid to the liquid inlet of the liquid treatment nozzle, causes the liquid to contact the collision part such that the liquid flows out from the liquid outlet. Then, in the nozzle body, when the liquid flow collides with the collision part and bypasses downstream thereof, the liquid flow is constricted in the trough portion, thereby accelerating and causing intense cavitation, generating bubbles while vigorously stirring the liquid by the action of decompression boiling. With this, the vortex generated when the high-speed flow bypasses the collision part is also added, and a very remarkable stirring region is formed in the vicinity of and directly below the collision part. The decompression region where bubbles are precipitated is limited to the vicinity of the bottom of the valley around the collision part, and since the high-speed liquid flow passes through this region almost instantaneously, the generated bubbles do not grow so much and are involved in the above-mentioned stirring region, and fine bubbles are efficiently generated.

[0017] The method for microbubbling carbon dioxide gas of the present invention supplies a mixed-phase flow of liquid and carbon dioxide gas to the collision part of the above liquid treatment nozzle, dissolves the carbon dioxide gas in the liquid, and causes the liquid to flow out from the liquid outlet. Then, a very remarkable strong stirring region is formed in the vicinity of and directly below the collision part. The bubbles generated by cavitation are not grown so much and are involved in the above-mentioned strong stirring region, and fine bubbles are efficiently generated.

[0018] As water, in addition to ordinary water and purified water, hard water, soft water, natural water, hot spring water, deep sea water, electrolyzed water, ionized water, cluster water, etc. can be used.

[0019] It is also possible to use only one of the above types of water, or to use a combination of two or more types.

[0020] The cosmetic of the present invention can contain arbitrary components usually used in cosmetics in addition to water.

[0021] Examples of frequently used arbitrary components include polyhydric alcohols, oily components, surfactants, water-soluble polymers, and pH adjusters.

[0022] Polyhydric alcohols may be used for the purpose of improving the permeability to the skin and hair and dissolving poorly soluble components in addition to the purpose of moisturizing.

[0023] Examples of polyhydric alcohols include ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol (1,2-propanediol), 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, dipropylene glycol, tripropylene glycol, 1,3-propanediol, methylpropanediol, 1,3-butylene glycol, 3-methyl-1,3-butanediol, 2,3-butanediol, hexylene glycol, ethoxydiglycol, glycerin, diglycerin, triglycerin, and polyglycerin. Other examples of polyhydric alcohols include sugars such as glucose, fructose, galactose, sucrose, lactose, maltose, trehalose, cellobiose, isomaltose, and oligosaccharides, as well as sugar alcohols such as sorbitol, xylitol, mannitol, maltitol, erythritol, and hydrogenated starch.

[0024] Oily components include liquid oils such as avocado oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, rice bran oil, jojoba oil, and germ oil, as well as cocoa butter, coconut oil, horse oil, hydrogenated coconut oil, palm oil, beef tallow, hydrogenated beef tallow, palm kernel oil, Japanese wax kernel oil, hydrogenated oil, and hydrogenated castor oil. Solid fats and oils, waxes such as beeswax, candelilla wax, cotton wax, carnauba wax, whale wax, rice bran wax, and lanolin, liquid paraffin, ozokerite, squalane, paraffin, ceresin, squalene, petrolatum, hydrocarbon oils such as microcrystalline wax, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, isostearic acid, linoleic acid, linolenic acid, etc. Examples include higher fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), higher alcohols such as lauryl alcohol, myristyl alcohol, cetanol, stearyl alcohol, behenyl alcohol, and isostearyl alcohol, synthetic ester oils such as cetyl ethylhexanoate, isopropyl myristate, glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, diethoxyethyl succinate, and tripropylene glycol dieopentanoate, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, decamethylcyclopentasiloxane, silicone resins forming a three-dimensional network structure, silicone rubber, amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, and acrylic silicones.

[0025] Examples of surfactants include lipophilic nonionic surfactants such as glyceryl monostearate, propylene glycol monostearate, and sorbitan monostearate; hydrophilic nonionic surfactants such as decaglyceryl monostearate, POE-glycerin monoisostearate, POE-sorbitan tetraoleate, POE-behenyl ether, and coconut oil fatty acid monoethanolamide; anionic surfactants such as sodium stearate, sodium N-stearoyl-L-glutamate, sodium POE-oleyl ether phosphate, sodium lauroyl sarcosinate, and sodium lauroyl methylalanine; cationic surfactants such as stearyltrimethylammonium chloride, dimethylaminopropyl stearate, and benzalkonium chloride; and amphoteric surfactants such as coconut oil fatty acid amidopropyl betaine and lauryldimethylaminoacetic acid betaine.

[0026] Water-soluble polymers include plant-derived polymers such as gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed, algae colloid (cassia extract), starch (rice, corn, potato, wheat), glucomannan, and tamarind gum; microbial polymers such as xanthan gum, gellan gum, curdlan, dextran, succinoglucan, pullulan, sodium polyglutamate, and hyaluronic acid (salt); starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch); and cellulose-based polymers (methylcellulose, ethylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose). Examples of water-soluble polymers include semi-synthetic water-soluble polymers such as carboxymethylcellulose, sodium carboxymethylcellulose, cationized cellulose, hydrophobic cellulose, crystalline cellulose, cellulose powder, etc., alginate polymers (e.g., sodium alginate, propylene glycol alginate ester, etc.), vinyl polymers (e.g., carboxyvinyl polymer (carbomer), polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, etc.), polyoxyethylene polymers (e.g., polyethylene glycol 20,000, 40,000, 60,000 polyoxyethylene polyoxypropylene copolymers, etc.), acrylic polymers (e.g., polyacrylic acid, polyethyl acrylate, polyacrylamide, etc.), polyethyleneimine, cationic polymers, etc.

[0027] Examples of pH adjusters include citric acid, citrate, lactic acid, lactate, phosphoric acid, phosphate, glycolic acid, glycolate, succinic acid, succinate, malic acid, malate, carbonate (sodium bicarbonate, sodium carbonate, etc.), glucono delta-lactone, amino acids, and amino acid salts.

[0028] Other ingredients that can be used include powdered components, UV absorbers, antioxidants, neutralizing agents, organic amines, preservatives (phenoxyethanol, glycerin ethylhexyl ether, methylparaben, etc.), metal ion chelating agents, bactericides, anti-inflammatory agents, astringents, whitening agents, vitamins, amino acids, blood circulation promoters, activators, excipients (maltitol, lactose, dextrin, starch, etc.), cooling agents (ethanol, menthol, etc.), various extracts, dyes, pigments, and fragrances.

[0029] In addition to the above ingredients, ingredients listed in the Japan Cosmetic Industry Association's List of Labeling Names, the Quasi-Drug Raw Material Standards, the Japanese Pharmacopoeia, the Official Compendium of Food Additives, etc., as well as known cosmetic ingredients, pharmaceutical ingredients, food ingredients, etc., may be blended in known combinations and quantities.

[0030] There are no particular restrictions on the pH of the cosmetic composition of the present invention, and it can be adjusted as appropriate depending on the purpose. However, in the case of skincare cosmetics, it is preferable to adjust the pH to about 5 to 8, taking into consideration skin irritation during use.

[0031] There are no particular restrictions on the viscosity of the cosmetic composition of the present invention, and it can be adjusted as appropriate depending on the purpose. However, in order to efficiently process the liquid, it is preferable that the viscosity of the water-containing liquid (including the liquid cosmetic composition) passing through the liquid processing nozzle at 25°C is 1000 mPa·s or less.

[0032] The cosmetic composition of the present invention can be manufactured by any method, and the process is not particularly limited, but the following methods are examples. (1) A method for obtaining a cosmetic product containing microbubbles by passing a multiphase flow of water and carbon dioxide through a liquid processing nozzle to atomize the carbon dioxide into microbubbles (hereinafter also referred to as "microbubbled water"), and then mixing it with other components. (2) A method for obtaining a cosmetic composition containing microbubbles by passing a multiphase flow of a liquid containing water mixed with some components and carbon dioxide through a liquid processing nozzle to atomize the carbon dioxide into microbubbles (hereinafter also referred to as "microbubble liquid"), and then mixing it with other components. (3) A method for obtaining a cosmetic containing fine bubbles by passing a multiphase flow of the entire liquid cosmetic containing water mixed with various components and carbon dioxide gas through a liquid processing nozzle.

[0033] The dosage form of the cosmetic composition of the present invention is not particularly limited and can be arbitrarily adjusted according to the purpose. For example, it may be a solution system, a solubilized system, an emulsion system (oil-in-water emulsion composition, water-in-oil emulsion composition, etc.), a two-layer water-oil system, a three-layer water-oil-powder system, a gel, a mist, a spray, an aerosol, a mousse, a roll-on, or a stick, or a formulation impregnated or coated onto a sheet such as a nonwoven fabric.

[0034] Furthermore, examples of cosmetic product forms of the present invention include skin cosmetics such as lotions, emulsions, creams, serums, and masks; skin cleansing products such as skin wipe-off cosmetics, body cosmetics, makeup removers, facial cleansers, and body shampoos; bath cosmetics such as bath essences and bubble baths; lip care cosmetics; nail cosmetics; hair cosmetics such as hair shampoos, hair conditioners, hair liquids, hair tonics, and hair growth products. Although the above products are intended for use on the human body, they may also be used as pet care cosmetics.

[0035] The cosmetic composition of the present invention can be contained in a container of a shape and material appropriately selected according to its intended use and application.

[0036] Product containers include, for example, spray type, bottle type, tube type, jar type, dropper type, dispenser type, stick type, pouch bag, etc.

[0037] Examples of container materials include polyethylene (HDPE, LDPE, LLDPE, etc.), polyethylene terephthalate, polypropylene and other resins, metals such as aluminum, and glass.

[0038] Furthermore, these materials can be used as container materials by applying various coating treatments, or by combining or laminating them, taking into consideration their strength, flexibility, weather resistance, or component stability.

[0039] In terms of maintaining the carbon dioxide in the composition in a more long-term stable manner, it is preferable to use a container made of polyethylene terephthalate. In addition, it is particularly preferable to use a container made of processed film with excellent gas barrier properties, aluminum foil, or a material that has been aluminum vapor-deposited or laminated (for example, an aluminum pouch).

[0040] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, the amounts of each component are all expressed in weight percent. [Examples]

[0041] Preparation of cosmetics containing microbubbles Examples 1-4 (lotion), Comparative Example 1 (lotion) Lotions for Experimental Examples 1-4 and Comparative Example 1 were prepared according to the formulations shown in Table 1 below. Immediately after preparation, each lotion was placed in a standard glass bottle, and its appearance was visually inspected. Furthermore, the concentration of carbon dioxide contained in the composition from immediately after preparation to 12 months later (stored at room temperature) was measured using the following method. <Method for measuring carbon dioxide> 100 mL of the sample was measured into a 1 L capacity Goodboy container, the lid was tightly closed, and the container was shaken vigorously for 1 minute. Then, a gas detection tube No. 2H was set in a Gastec GV-100S detector (manufactured by Gastec), and the carbon dioxide gas accumulated at the top of the Goodboy was drawn in with the detection tube. The carbon dioxide concentration was measured from the color change area. *1 Preparation method (A) A multiphase flow of water and carbon dioxide was passed through a liquid processing nozzle manufactured by Water Design Co., Ltd. at room temperature, and the entire liquid was thoroughly circulated. After confirming that the carbon dioxide concentration in the fine-bubble water reached approximately 40,000 ppm, other ingredients were mixed in to obtain a lotion. (B) The entire liquid cosmetic mixture, containing various components, and carbon dioxide were passed through a liquid processing nozzle manufactured by Water Design Co., Ltd. at room temperature, and the entire liquid was thoroughly circulated. After confirming that the carbon dioxide concentration of the liquid cosmetic mixture was approximately 40,000 ppm, a lotion was obtained. (C) A lotion was prepared by mixing various ingredients other than carbon dioxide (without containing carbon dioxide). *2 Storage material AL (aluminum pouch), PE (polyethylene container), PET (polyethylene terephthalate container)

[0042] [Table 1] The lotions of Examples 1-4 maintained a high concentration of carbon dioxide for an extended period immediately after preparation. In particular, when stored in aluminum pouches, no decrease in carbon dioxide concentration was observed from one month after preparation to twelve months later.

[0043] Example 5 (Emulsion) Following the formulation shown in Table 2 below, a multiphase flow of water containing ingredients other than fragrance and carbon dioxide was passed through a liquid processing nozzle manufactured by Water Design Co., Ltd., allowing the entire liquid to circulate thoroughly. After confirming that the carbon dioxide concentration in the fine-bubble liquid was approximately 30,000 ppm, the fragrance components were mixed in to obtain an emulsion.

[0044] [Table 2]

[0045] Example 6 (Moisturizing Gel) Following the formulation shown in Table 3 below, a multiphase flow of water and carbon dioxide was passed through a liquid processing nozzle manufactured by Water Design Co., Ltd., allowing the entire liquid to circulate thoroughly. After confirming that the carbon dioxide concentration in the fine-bubble water reached approximately 40,000 ppm, other components were mixed in to obtain a moisturizing gel.

[0046] [Table 3]

[0047] Example 7 (Hair growth serum) Following the formulation shown in Table 4 below, the entire liquid cosmetic mixture, containing various ingredients, was passed through a liquid processing nozzle manufactured by Water Design Co., Ltd., and the entire liquid was thoroughly circulated. After confirming that the carbon dioxide concentration of the liquid cosmetic mixture reached approximately 50,000 ppm, a hair growth serum was obtained.

[0048] [Table 4]

[0049] Example 8 (Cleansing Oil) Following the formulation shown in Table 5 below, the entire liquid cosmetic mixture containing various ingredients and carbon dioxide was passed through a liquid processing nozzle manufactured by Water Design Co., Ltd., allowing the entire liquid to circulate thoroughly. After confirming that the carbon dioxide concentration of the liquid cosmetic mixture reached approximately 20,000 ppm, a cleansing oil was obtained.

[0050] [Table 5]

[0051] Example 9 (Hair Shampoo) Following the formulation shown in Table 6 below, a multiphase flow of water and carbon dioxide was passed through a liquid processing nozzle manufactured by Water Design Co., Ltd., allowing the entire liquid to circulate thoroughly. After confirming that the carbon dioxide concentration in the fine-bubble water reached approximately 30,000 ppm, other ingredients were mixed in to obtain hair shampoo.

[0052] [Table 6] [Explanation of Symbols]

[0053] 1. Liquid processing nozzle 2. Nozzle body O center axis 3. Liquid channel 4 liquid inlet 5 liquid outlet 6 Inflow chamber 7 Outflow chamber 8 Bulkhead 9 aperture holes 10. Impact part (screw member) CORE Processing Core 11 Yamabe 12 Tanibe 15. Liquid Flow Gap 16. Inlet connection part (threaded part) 17 Outlet side connection part (threaded part) 20 Circumscribed circle

Claims

1. A cosmetic product containing fine bubbles obtained by passing a multiphase flow of water or a water-containing liquid and carbon dioxide through a cavitation-type liquid processing nozzle.

2. The cosmetic composition according to claim 1, wherein the cavitation-type liquid processing nozzle is a liquid processing nozzle manufactured by Water Design Co., Ltd.

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