Method for producing emulsion composition

Abstract

To provide an emulsion composition which has improved emulsion stability and can be jetted from a nozzle while maintaining the emulsion stability without reducing the amount of an oily component, to provide a cosmetic containing the emulsion composition, and to provide a method for producing the emulsion composition.SOLUTION: The emulsion composition of the present invention comprises a polyol having three or more hydroxyl groups in the molecule, a surfactant having 10 or more carbon atoms that forms an O / W (oil-in-water) emulsion with an HLB (hydrophile-lipophilebalancevalue) of 12 or more, an oily component, water, and a polymeric emulsifier comprising crystalline cellulose, xanthan gum, and cellulose gum, and is emulsified by a combination of a D-phase emulsification method and a powder emulsification method.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to, for example, an oil-in-water emulsion composition used in an emulsion or the like, and a cosmetic preparation containing the emulsion composition. [Background technology]

[0002] Emulsions are generally well known as cosmetics that replenish the moisture, moisturizers, oils, etc. contained in their constituent ingredients to human skin, thereby maintaining skin moisture and flexibility. An emulsion composition is contained as a main component of the emulsion, and an example of such an emulsion composition is disclosed in Patent Document 1.

[0003] Patent Document 1 describes an emulsion composition containing poly(methoxypolyethylene glycol methacrylate), polyglycerol fatty acid ester, glycerin, and an oily component. Patent Document 1 describes a gel composition prepared by the D-phase emulsification method, which, when dispersed in water, results in a fine emulsion particle size. When the gel composition is used in cosmetics such as lotions and emulsions together with a thickener, the amount of thickener added to the cosmetics can be reduced. This results in the emulsion composition (cosmetics) being free of the stickiness typically associated with thickeners and capable of suppressing moisture evaporation.

[0004] Emulsions are generally distributed on the market in resin tubes, resin bottles, or jars, and have recently been commercialized in push-type nozzle containers or spray-type nozzle containers. As is well known, push-type nozzle containers are containers that expel a high-viscosity filling from the nozzle by pushing a nozzle-equipped pump head downward, similar to dispensers that contain relatively high-viscosity fillings, such as shampoos and body soaps, which are primarily slurry-like. Spray-type nozzle containers are containers that expel a low-viscosity filling from the nozzle by pumping, similar to dispensers that contain relatively low-viscosity fillings, such as perfumes and fragrances. Emulsions in spray-type nozzle containers are particularly user-friendly, as they allow users to easily apply the lotion to their hands, making them popular among young people. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-92082 Summary of the Invention [Problem to be solved by the invention]

[0006] As in Patent Document 1, in emulsions and the like (cosmetics) containing an oil-in-water emulsion composition, generally, as the content ratio of oil components in the emulsion increases, the viscosity of the emulsion increases due to the increase in the internal phase of the oil component in the internal / external phase ratio, and the skin moisturizing effect improves. However, in spray nozzle container types in which the emulsion is ejected from a container by spraying it out, unless the emulsion has a relatively low viscosity, the emulsion cannot flow smoothly through the nozzle, posing a problem that it is difficult to provide an emulsion containing a higher amount of oil components and having excellent moisturizing effect in a spray nozzle container type.

[0007] The present invention has been made to solve the above-mentioned problems, and aims to provide an emulsion composition that can be sprayed from a nozzle while improving emulsion stability and maintaining emulsion stability, even when a spray nozzle is used, without reducing the blending amount of an oily component, a cosmetic containing the emulsion composition, and a method for producing the emulsion composition. [Means for solving the problem]

[0008] (1) One aspect of the present invention, which has been made to solve the above-mentioned problems, is characterized by comprising a polyol having three or more hydroxyl groups in the molecule, a surfactant having 10 or more carbon atoms that generates an O / W (Oil in Water) type emulsion with an HLB (Hydrophile-Lipophile Balance Value) value of 12 or more, an oily component, water, and a polymer emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum, and is emulsified by a combination of a D-phase emulsification method and a powder emulsification method.

[0009] According to this aspect, even when a moisturizing agent (cosmetic) such as an emulsion having a high content of oily components and excellent moisturizing effect is filled in a container equipped with a pump nozzle, the emulsion composition according to the present invention has physical properties that enable it to be sprayed from the nozzle by pumping the container while maintaining emulsion stability, and therefore can be applied to cosmetics for such applications.

[0010] (2) In the above embodiment, the content of the polymer emulsifier in the emulsion composition is preferably 0.1 wt % or more and 2 wt % or less.

[0011] According to this embodiment, when the crystalline cellulose contained in polymer emulsifier (DPF) is attached to the interface of the emulsion of oily components that is uniformly refined based on powder emulsification method, the crystalline cellulose can be attached to the interface of the emulsion of oily components with a strong binding force that prevents the refined oily components and the thickened water from separating from each other.Therefore, in the emulsion composition of the present invention, the emulsion of oily components protected by crystalline cellulose remains uniformly refined and stable over time.In addition, when the emulsion composition of the present invention is sprayed, it does not have a high viscosity that prevents it from flowing through the well-known spray nozzle that is commonly used, and has the physical properties of viscosity that can smoothly flow through this spray nozzle.

[0012] (3) In the above embodiment, the viscosity of the emulsion composition is preferably 0.3 Pa·s or more and 1.0 Pa·s or less.

[0013] According to this aspect, the emulsion composition of the present invention can be used to make a moisturizer (cosmetic) such as an emulsion having excellent moisturizing effect, and therefore, the oily component contained in the emulsion composition, which is the main component of the moisturizer, can satisfy both the first requirement of, for example, satisfying the required content ratio of 30 (wt%), and the second requirement of being able to adjust the physical properties of the moisturizer so that it can be sprayed from a nozzle by pumping the container.

[0014] (4) In the above embodiment, the content of the oily component in the emulsion composition is preferably 5 wt % or more and 35 wt % or less.

[0015] According to this aspect, when the emulsion composition of the present invention is contained in a moisturizer (cosmetic) such as an emulsion, the moisturizing effect of the moisturizer (cosmetic) is significantly enhanced by the emulsion composition, and the moisture and oil contained in the constituent components of the emulsion composition are sufficiently provided to human skin, making it possible to maintain the moisture and flexibility of the skin.

[0016] (5) In the above embodiment, the emulsion composition according to any one of (1) to (4) is used as a main ingredient and at least one or more auxiliary ingredients are blended therein, and the auxiliary ingredients include ascorbic acid, L-ascorbic acid 2-glucoside, ε-aminocaproic acid, allantoin, isopropylmethylphenol, estradiol, oryzanol camphor, dipotassium glycyrrhizinate, monoammonium glycyrrhizinate, β-glycyrrhetinic acid, stearyl glycyrrhetinate, salicylic acid, zinc oxide, ascorbyl dipalmitate, tetroxide, and the like. Preferably, the active ingredient is at least one of ascorbyl 2-hexyldecanoate, tocopherol acetate, tocopherol nicotinate, tranexamic acid, niacinamide, nicotinamide, urea, vitamin A oil, hinokitiol, placenta extract, benzalkonium chloride, menthol, retinol palmitate, glycine betaine, amino acids, N-amidino-L-proline, plant extract, essential oil, ceramide, or cholesteryl ester.

[0017] According to this aspect, the cosmetic according to the present invention exhibits an excellent moisturizing effect due to the emulsion composition, and can provide human skin with sufficient moisture and oil contained in the constituent components of the emulsion composition, thereby imparting moisture and softness to the skin.

[0018] (6) Another aspect of the present invention, which has been made to solve the above problems, is a composition comprising a polyol having three or more hydroxyl groups in the molecule and an O / W (oil in water) oil having an HLB (Hydrophile-lipophile balance value) value of 12 or more. The method comprises the following steps: a first step of producing an emulsion of an oily component by a D-phase emulsification method using a surfactant having 10 or more carbon atoms that produces a (water)-type emulsion and first water required for emulsification, thereby producing a finely-treated oily component in which the oily component has been finely divided; a second step of adding a polymeric emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum to second water, which is a solvent, separately from the first water, and stirring the second water and the polymeric emulsifier to produce thickened water in which the second water is thickened with the xanthan gum and the cellulose gum; and a third step of mixing the finely-treated oily component and the thickened water, and attaching the crystalline cellulose contained in the polymeric emulsifier to the interface between the finely-treated oily component and the thickened water by a powder emulsification method.

[0019] According to this embodiment, even when a moisturizing agent (cosmetic) such as an emulsion having a high content of oily components and excellent moisturizing effect is filled into a spray nozzle-type container, an emulsion composition that can be applied to cosmetics for such uses can be prepared with physical properties that enable it to be sprayed from a nozzle by pumping the container or the like while maintaining emulsion stability.

[0020] (7) In the above aspect, it is preferable that the content ratio of the finely treated oily component to the thickened water is 10 wt% to 50 wt% of the finely treated oily component and 90 wt% to 50 wt% of the thickened water.

[0021] According to this embodiment, the prepared emulsified composition can be adjusted to have physical properties that enable it to be sprayed smoothly without stagnation from the nozzle by pumping or the like of the spray nozzle-type container described above.

[0022] In the above embodiment, in the second step, silicate anion (chemical formula: [SiO2+n ] 2n- It is preferable that a silicate mineral consisting of the subunits:

[0023] According to this embodiment, when the finely processed oily component and the thickened water are mixed, the plate-like crystals are interlocked to form a card-house structure skeleton, so that in the oily component emulsion, the oily phase component is easily tightly surrounded and held by the surrounding aqueous phase.Therefore, the oily component emulsion protected by crystalline cellulose can be maintained in a uniformly finely divided state and stable over time. [Effects of the Invention]

[0024] The emulsion composition, cosmetic containing the emulsion composition, and method for producing the emulsion composition according to the present invention improve emulsion stability and also provide a form that allows the emulsion to be sprayed from a nozzle while maintaining emulsion stability without reducing the blending amount of oily components.

[0025] The emulsion composition of the present invention, a cosmetic preparation containing the emulsion composition, and a method for producing the emulsion composition are described below. The emulsion composition of the present invention contains a polyol having three or more hydroxyl groups in the molecule, a surfactant having 10 or more carbon atoms that forms an O / W (oil-in-water) emulsion with an HLB (Hydrophile-Lipophile Balance Value) value of 12 or more, an oily component, water, and a polymeric emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum, and is emulsified using a combination of D-phase emulsification and powder emulsification. The viscosity of this emulsion composition is 0.3 Pa·s or more and 1.0 Pa·s or less, preferably 0.35 Pa·s or more and 0.65 Pa·s or less.

[0026] Examples of polyols used in preparing the emulsion composition of the present invention include polyhydric alcohols belonging to sugar alcohols such as glycerin, sorbitol, mannitol, xylitol, erythritol, maltitol, etc. Other examples include polyhydric alcohols such as hydrogenated starch hydrolysates, diglycerin, and polyglycerin.

[0027] Surfactants are considered to have any of the following attributes: anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants. Among these four attributes, surfactants may be composed of a substance with a single attribute or a mixture of substances with two or more attributes. Furthermore, surfactants may consist of a single substance or multiple substances. In particular, when surfactants consist of multiple substances, they may be composed of substances with different attributes, such as a mixture of a substance that becomes an anionic surfactant and a substance that becomes a cationic surfactant, or they may be composed of multiple substances with the same attribute.

[0028] Specific examples of anionic surfactants include lauroyl lysine such as sodium dilauroyl glutamate lysine, as well as gemini anionic surfactants such as sebacoyl bislauramide lysine disodium and sodium coconut oil alkyl glucoside hydroxypropyl phosphate. Other examples include sodium lauroyl hydrolyzed silk, sodium surfactin, fatty acid soaps (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, and triethanolamine alkyl sulfate ether.

[0029] Examples of cationic surfactants include stearyltrimethylammonium chloride, benzalkonium chloride, and laurylamine oxide.

[0030] An example of a nonionic surfactant is a polyglycerin fatty acid ester, which may be a substance in which 1 to 5 fatty acids having 8 to 22 carbon atoms are ester-bonded to polyglycerin, which is formed by polymerizing 2 to 20 glycerins.

[0031] Specific examples include polyglycerin fatty acid esters such as decaglyceryl monostearate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monoisostearate, decaglyceryl monooleate, decaglyceryl monolinoleate, decaglyceryl distearate, decaglyceryl diisostearate, decaglyceryl tristearate, decaglyceryl trioleate, decaglyceryl pentastearate, decaglyceryl pentahydroxystearate, decaglyceryl pentaisostearate, decaglyceryl pentaoleate, tetraglyceryl monostearate, tetraglyceryl monooleate, tetraglyceryl tristearate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, and hexaglyceryl monooleate. Other examples include polyoxyethylene hydrogenated castor oils and sucrose fatty acid esters.

[0032] Examples of amphoteric surfactants include betaine surfactants (alkylbetaine, amidobetaine, sulfobetaine, etc.), imidazoline amphoteric surfactants (2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.), and acylmethyltaurine.

[0033] Examples of oily components include ester oils such as octyldodecyl myristate, cetyl ethylhexanoate, ethylhexyl palmitate, isopropyl myristate, caprylic / capric triglyceride, cetyl octanoate, hexyl laurate, isopropyl myristate, octyl palmitate, isocetyl stearate, isopropyl isostearate, octyl isopalmitate, isodecyl oleate, glyceryl tri-2-ethylhexanoate, pentaerythrityl tetra-2-ethylhexanoate, 2-ethylhexyl succinate, and diethyl sebacate.

[0034] Other examples include vegetable oils such as olive oil, sunflower seed oil, jojoba seed oil, linseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, avocado oil, camellia oil, castor oil, safflower oil, sunflower oil, almond oil, rapeseed oil, sesame oil, soybean oil, peanut oil, and triglycerin.

[0035] Other examples include hydrocarbon oils such as mineral oil, liquid paraffin, squalane, squalene, paraffin, and isoparaffin.

[0036] Furthermore, examples of silicone oils include chain silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, as well as cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

[0037] In particular, when preparing the emulsion composition of the present invention, the oil component includes at least one of caprylic / capric triglyceride, mineral oil, jojoba seed wax, olive oil, sunflower seed oil, octyldodecyl myristate, cetyl ethylhexanoate, ethylhexyl palmitate, and isopropyl myristate.

[0038] The polymer emulsifier is a thickener made of crystalline cellulose, xanthan gum, and cellulose gum (manufactured by Jan Dekker, product name "DEKAMULEN POWER'FEEL", abbreviated as "DPF").

[0039] The method for producing an emulsion composition according to the present invention comprises three steps, Steps 1 to 3. In Step 1, an emulsion of an oily component is produced by a D-phase emulsification method using a polyol having three or more hydroxyl groups in the molecule, a surfactant having 10 or more carbon atoms that generates an O / W (oil-in-water) emulsion with an HLB (Hydrophile-Lipophile Balance Value) value of 12 or more, and the first water (purified water) required for emulsification, to produce a finely-processed oily component in which the oily component has been finely divided. The content of the oily component in the emulsion composition is 5 wt% or more and 35 wt% or less.

[0040] In the second step, a polymeric emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum is added to second water, which is a solvent, separately from the first water, and the second water and the polymeric emulsifier are stirred to thicken the second water with the xanthan gum and cellulose gum, producing thickened treated water. The content of the polymeric emulsifier in the emulsion composition is 0.1 wt% or more and 2 wt% or less.

[0041] In the second step, various additives may be added to adjust the physical properties of the emulsion composition according to the present invention. Specifically, a thickening aid, which is a type of additive, is added for the purpose of further enhancing the thickening effect of the polymer emulsifier. Examples of thickening aids include bentonite such as sodium bentonite, calcium bentonite, and activated bentonite (calcium soda ash treated product), montmorillonite, beidellite, nontronite, laponite, hectorite, and silicate anions (chemical formula: [SiO 2+n ] 2n- ) silicate minerals are examples of silicate minerals consisting of subunits.

[0042] In addition, a pH adjuster, which is a type of additive, is added. Examples of pH adjusters include 2-amino-2-hydroxymethyl-1,3-propanediol, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol. Further examples include AMP, AMPD, DL-malic acid, L-arginine, TEA, adipic acid, aminohydroxymethylpropanediol, arginine, citric acid, sodium citrate, succinic acid, disodium succinate, tartaric acid, potassium hydroxide, sodium hydroxide, sodium carbonate, sodium bicarbonate, triethanolamine, tromethamine, lactic acid, sodium lactate, malic acid, phosphoric acid, potassium dihydrogen phosphate, sodium monohydrogen phosphate, sodium dihydrogen phosphate, and disodium phosphate.

[0043] Preservatives, a type of additive, are also added. Examples of preservatives include paraoxybenzoic acid esters (parabens such as methylparaben, ethylparaben, propylparaben, and butylparaben) and phenoxyethanol. Other examples include alkanediols such as 1,2-pentanediol (pentylene glycol), 1,2-hexanediol, 1,2-octanediol, and 1,3-butylene glycol, and alkyl glyceryl ethers such as 2-ethylhexylglyceryl ether (ethylhexylglycerin). Other examples include glycerin fatty acid esters such as glyceryl caprylate, glyceryl caprate, and glyceryl (caprylic / capric acid), salicylic acid, sodium benzoate, and isothiazolinone derivatives such as methylchloroisothiazolinone and methylisothiazolinone. Other examples include imidazolinium urea, dehydroacetic acid and its salts, and phenols. Further examples include halogenated bisphenols such as triclosan, acid amides, quaternary ammonium salts, trichlorocarbanide, zinc pyrithione, benzalkonium chloride, benzethonium chloride, sorbic acid, chlorhexidine, chlorhexidine gluconate, halocarban, hexachlorophene, hinokitiol, and other phenols such as phenol, isopropylphenol, cresol, thymol, parachlorophenol, phenylphenol, and sodium phenylphenol. Additionally, phenylethyl alcohol, photosensitizers, antibacterial zeolites, silver ions, etc.

[0044] In the third step, the finely treated oily component and the thickened water are mixed, and the crystalline cellulose contained in the polymer emulsifier is attached to the interface between the finely treated oily component and the thickened water by a powder emulsification method. In the third step, the content ratio of the finely treated oily component to the thickened water is 10 wt% to 50 wt%, and the thickened water is 90 wt% to 50 wt%.

[0045] The cosmetic preparation according to the present invention contains, for example, auxiliary agents such as anti-inflammatory agents, whitening agents, anti-wrinkle agents, moisturizing agents, etc., together with the emulsion composition (main ingredient) according to the present invention. Examples of such auxiliary agents include ascorbic acid, L-ascorbic acid 2-glucoside, ε-aminocaproic acid, allantoin, isopropylmethylphenol, estradiol, oryzanol camphor, dipotassium glycyrrhizinate, monoammonium glycyrrhizinate, β-glycyrrhetinic acid, stearyl glycyrrhetinate, salicylic acid, zinc oxide, ascorbyl dipalmitate, ascorbyl tetra-2-hexyldecanoate, tocopherol acetate, tocopherol nicotinate, tranexamic acid, niacinamide, nicotinamide, urea, vitamin A oil, hinokitiol, placenta extract, benzalkonium chloride, menthol, retinol palmitate, glycine betaine, amino acids, N-amidino-L-proline, plant extracts, essential oils, ceramide, and cholesteryl esters.

[0046] In addition, as long as the emulsion composition of the present invention is included as a constituent component of the cosmetic of the present invention, the types of auxiliary agents and substances that constitute the auxiliary agents contained in the cosmetic of the present invention are not limited to the types and substances exemplified above, and various changes are possible. [Brief explanation of the drawings]

[0047] [Figure 1] FIG. 1 is an explanatory diagram schematically illustrating steps of a method for producing an emulsion composition according to an embodiment. [Figure 2] 1 is a table showing the physical properties of the samples according to Examples 1 to 3 one month after production, both at an ambient temperature of 20° C. and at an ambient temperature of 50° C. [Figure 3] This table shows the physical properties of the samples according to Comparative Examples 1 to 7, one month after production, both at an ambient temperature of 20°C and at an ambient temperature of 50°C, and also shows a schematic diagram of the state of the sample according to Comparative Example 8. [Figure 4]1 is a micrograph taken at an ambient temperature of 20° C. immediately after preparation, showing the state of emulsification using an emulsion composition according to an embodiment. [Figure 5] FIG. 1 is a view showing a micrograph of an emulsified emulsion composition according to an embodiment, taken under conditions after storage at an ambient temperature of 50° C. for two months after preparation. DETAILED DESCRIPTION OF THE INVENTION

[0048] The emulsion composition, cosmetic, and method for producing the emulsion composition according to the present invention will be described in detail below based on embodiments, along with Examples 1 to 3 and Comparative Examples 1 to 8. In embodiments, the emulsion composition according to the present invention is an emulsion composition to be incorporated into cosmetics such as emulsions, and the cosmetic according to the present invention is a moisturizing agent for such emulsions. The moisturizing agent according to the embodiments exhibits physical properties that allow it to be sprayed smoothly and without stagnation from a spray nozzle, even when contained in a spray nozzle-type container.

[0049] First, the emulsion composition according to the present embodiment and its manufacturing method will be described. Fig. 1 is an explanatory diagram that schematically shows the steps of the manufacturing method of the emulsion composition according to the embodiment. The emulsion composition according to the present embodiment is manufactured by the manufacturing method of the emulsion composition according to the present embodiment, by first carrying out the first and second steps and then carrying out the third step, as shown in Fig. 1.

[0050] In the emulsion composition according to this embodiment, the polyol is glycerin (trihydric alcohol). The amount of glycerin added is within the range of 10 to 35 wt% in terms of the content ratio of the entire finely treated oily component produced in the first step. The surfactant is sodium dilauroyl glutamate lysine, which is an anionic surfactant and belongs to the gemini surfactant family.

[0051] Sodium dilauroyl glutamate lysine is a surfactant having two chains and three hydrophilic groups, and when used as an emulsifier, the concentration at which it can exert its surface activity can be reduced to about 1 to 10% compared to an anionic surfactant having one chain and one hydrophilic group. Therefore, when producing an O / W emulsion with an oily component using the emulsion composition of this embodiment, the amount of sodium dilauroyl glutamate lysine added is as small as about 0.1 to 2 wt%.

[0052] Furthermore, because the outer phase surrounding the oily component of the resulting O / W emulsion is anionized, coalescence of the emulsified particles that accompanies emulsion collapse is unlikely to occur, and phase separation between the oil and water phases in the droplets is suppressed. Therefore, this O / W emulsion forms droplets in a stabilized phase state.

[0053] The content of purified water in the entire finely treated oily component is within the range of 0.1 to 3 wt%. However, when glycerin contains water as a component other than alcohol, if the purity of the alcohol component is, for example, about 96 to 97 wt% and the remaining component is water, the addition of purified water as the first water may be omitted.

[0054] 1, in the first step of the method for producing an emulsion composition according to this embodiment, glycerin, sodium dilauramidoglutamate lysine, and first purified water (first water) are placed in a first container, and these three substances are mixed by stirring using a propeller or anchor stirrer at a constant temperature of 20 to 40°C and a blade rotation speed of 500 rpm. As a result, the external phase (aqueous phase) of the O / W emulsion to be produced is formed from the mixture of these three substances.

[0055] Next, while continuing to stir the aqueous phase mixture in the first container with a stirrer, the oily component is added to the aqueous phase mixture and mixed to produce a finely processed oily component. The oily component accounts for 60-90 wt% of the finely processed oily component. At this time, the aqueous phase mixture and the oily component are mixed while slowly adding the oily component dropwise at a rate of 5-10 wt% / min until the oily component reaches this concentration. After the entire amount of the oily component has been added dropwise, the aqueous phase mixture and the oily component are continued to be stirred for 10 minutes. In this way, the finely processed oily component is produced in the first container.

[0056] In the second step of the method for producing an emulsified composition according to this embodiment, thickened water is prepared by pouring second purified water (second water) as a solvent into a second container, and then adding a polymer emulsifier (DPF) and bentonite (thickening aid) to the second purified water. The contents of both the polymer emulsifier and bentonite in the thickened water are set to 0.1 to 2 wt %, and the rest is second purified water.

[0057] Next, the mixture of the second purified water, the polymer emulsifier, and the bentonite is stirred for 10 minutes in a homomixer at a turbine blade rotation speed of 2000 rpm to cause swelling, thereby making the mixture thicker than the second purified water.Thus, thickened treated water is produced in the second container.

[0058] In the second step of the method for producing an emulsion composition according to this embodiment, the thickener used is a polymeric emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum (manufactured by Jan Dekker GmbH, product name "DEKAMULEN POWER'FEEL," abbreviated as "DPF"). However, instead of DPF, the following polymeric emulsifiers may be used as the thickener. One such polymeric emulsifier is a thickener consisting of Sphingomonas culture extract, crystalline cellulose, and cellulose gum (manufactured by Lubrizol GmbH, product name "PemuPur START polymer").

[0059] In the third step of the method for producing an emulsion composition according to this embodiment, a finely processed oily component is mixed with thickened water. The emulsion composition according to this embodiment contains 10 to 50 wt% of the finely processed oily component and 50 to 90 wt% of the thickened water. Next, the finely processed oily component and the thickened water are continuously stirred for 10 minutes using a homomixer at a constant temperature within the range of 20 to 40°C. This allows the crystalline cellulose contained in the polymer emulsifier to adhere to the interface between the finely processed oily component and the thickened water. The adhesion of the crystalline cellulose to this interface maintains a stable emulsified state between the finely processed oily component and the thickened water. Thus, the emulsion composition according to this embodiment is produced.

[0060] In order to confirm the significance of the emulsion composition according to this embodiment, the applicant conducted a verification experiment to investigate the emulsification state of each sample using samples of the emulsion compositions (mixtures) according to Examples 1 to 3 and Comparative Examples 1 to 8.

[0061] <Verification experiment> The verification experiments were conducted using samples according to Examples 1 to 3 and Comparative Examples 1 to 8. The samples according to Examples 1 to 3 were emulsion compositions (mixtures) prepared based on the method for producing an emulsion composition according to this embodiment. The samples according to Comparative Examples 1 to 7 were mixtures prepared by a production method using a thickener other than the DPF used in Examples 1 to 3, among the methods for producing an emulsion composition according to this embodiment, and Comparative Example 8 was an experiment using a sample of a mixture that did not contain a thickener.

[0062] (1) Experimental method In the verification experiment, 100 g of each mixture from Examples 1 to 3 and Comparative Examples 1 to 8 was filled into a container, and the container was then sealed to produce a total of 11 types of samples, two for each type. Of the 11 samples, excluding the samples from Comparative Examples 2 and 8, nine samples from the mixtures from Examples 1 to 3 and Comparative Examples 1, 3 to 7 were stored statically on a shelf in a room at a temperature of approximately 20°C for 30 days after sample preparation (room temperature storage condition). The other sample was stored statically in a sealed thermostatic chamber in an atmosphere at a temperature of 50°C (high temperature storage condition). After 30 days, the condition of the samples stored under both the room temperature storage condition and the high temperature storage condition was visually observed.

[0063] Furthermore, for a total of nine samples of the mixtures according to Examples 1 to 3 and Comparative Examples 1 and 3 to 7 used under high-temperature storage conditions, the viscosity of the samples was measured using a viscometer (manufactured by Toki Sangyo Co., Ltd., B-type viscometer (spindle), model: TVB-10M) at the time of sample preparation and after a 30-day storage period. Additionally, for the samples according to Example 1, Comparative Example 3, and Comparative Example 7, the average particle size of the samples was also measured using an electron microscope after a 30-day storage period.

[0064] Furthermore, as a spraying test of the emulsion composition, the emulsion compositions according to Examples 1 to 3 and Comparative Examples 1 and 3 to 7 were filled into a spray nozzle type container generally used for cosmetics, and it was confirmed whether the emulsion composition in the container could actually be smoothly sprayed from the nozzle by pumping.

[0065] (2) Experimental conditions To produce an emulsion with excellent moisturizing effects, it is generally believed that the oil content of the emulsion composition, which is the main component of the emulsion, should be approximately 30 wt%. Therefore, for the samples of Examples 1 to 3 and Comparative Examples 1, 3 to 7, the oil content of the emulsion composition was adjusted to 30 wt%. Furthermore, the present applicant has come to the conclusion through numerous experiments that, when such an emulsion is to be sprayed from a container through a spray nozzle, it is important that the emulsion contain an emulsion composition with a viscosity of, for example, approximately 1 to 1.5 Pa.s. Therefore, for the samples of Comparative Examples 1, 3 to 7, the viscosity was adjusted to approximately 1 Pa.s at room temperature.

[0066] For the sample of Comparative Example 8, the mixture did not emulsify in the first place during the preparation stage, so experiments under room temperature and high temperature storage conditions were abandoned at this stage. For the sample of Comparative Example 2, the mixture could not maintain an emulsified state after stirring and immediately separated, so experiments under room temperature and high temperature storage conditions were abandoned.

[0067] [Composition of finely processed oily ingredients] <Common conditions for Examples 1 to 3 and Comparative Examples 1 to 8> Oily component: Tri(caprylic / capric acid)glyceryl Polyols; glycerin Water (first purified water) Surfactant: Sodium dilauroyl glutamate lysine The content of each component in the finely processed oily component (wt%) is: oily component 80, glycerin 17, water 2, surfactant 1

[0068] [Composition of thickened treated water] <Common conditions for Examples 1 to 3 and Comparative Examples 1 to 8> Water (second purified water) Additives: pH adjuster (1,3-propanediol), preservative (caprylhydroxamic acid) <Common conditions for Examples 1 to 3 and Comparative Examples 1 to 7> ·Thickening agent: bentonite The percentage of each component in the thickened water (wt%) is: finely processed oily components 38%, pH adjuster 8%, preservative 1%, thickening agent 0.5%.

[0069] <Conditions common to Examples 1 to 3> Thickener; polymer emulsifier (manufactured by Jan Dekker, product name "DEKAMULEN POWER'FEEL", abbreviated as "DPF") <Conditions for Examples 1 to 3> Water content (wt%) in the thickened water: 51.75 (Example 1), 51.9 (Example 2), 52.0 (Example 3) The content (wt%) of the thickener in the thickened treated water: 0.75 (Example 1), 0.60 (Example 2), 0.50 (Example 3)

[0070] <Conditions for Comparative Examples 1 to 8> Water content (wt%) in the thickened water: 52.1 (Comparative Example 1), 52.0 (Comparative Example 2), 52.1 (Comparative Example 3), 52.0 (Comparative Example 4), 52.2 (Comparative Example 5), 52.1 (Comparative Example 6), 49.37 (Comparative Example 7), 53.0 (Comparative Example 8) Thickeners: xanthan gum (Comparative Example 1), crystalline cellulose (Comparative Example 2), cellulose gum (Comparative Example 3), sclerotium gum (Comparative Example 4), hydrophobized hydroxypropyl methylcellulose (Comparative Example 5), hydroxyethyl cellulose (Comparative Example 6), carbomer (Comparative Example 7), no blend (Comparative Example 8) The content (wt%) of the thickener in the thickened treated water: 0.4 (Comparative Example 1), 0.5 (Comparative Example 2), 0.4 (Comparative Example 3), 0.5 (Comparative Example 4), 0.3 (Comparative Example 5), 0.4 (Comparative Example 6), 0.1 (Comparative Example 7), 0 (Comparative Example 8)

[0071] <Additional conditions for Comparative Example 7> ·water Additive: Potassium hydroxide (additional pH adjuster) The proportion of water and potassium hydroxide in the thickened treated water (wt%): 3 (water), 0.03 (potassium hydroxide)

[0072] (3) Evaluation method Emulsion stability was evaluated by visually observing the phase state of the emulsion composition's appearance and dividing it into three categories using ○, △, and ×. A ○ indicates that no separation of the emulsion composition was observed, a △ indicates that slight separation was observed below the emulsion composition, and an × indicates that separation of the emulsion composition was clearly observed. Applicability to a spray nozzle container was evaluated based on whether the emulsion composition in a stable emulsion state without separation could be normally sprayed through the nozzle of a spray nozzle-type container. The overall evaluation was based on the evaluation items for emulsion stability at temperatures of 20°C and 50°C and applicability to a spray nozzle-type container. A ○ indicates that the emulsion composition was suitable for use in a spray nozzle-type container, where the emulsion composition was sprayed from a spray nozzle while maintaining emulsion stability at temperatures of 20°C and 50°C, and an × indicates that it was not suitable.

[0073] <Experimental Results> Fig. 2 is a table showing the physical properties of the samples according to Examples 1 to 3, one month after production, at an ambient temperature of 20°C and at an ambient temperature of 50°C. Fig. 3 is a table showing the physical properties of the samples according to Comparative Examples 1 to 7, one month after production, at an ambient temperature of 20°C and at an ambient temperature of 50°C, and also showing a schematic diagram of the state of the sample according to Comparative Example 8.

[0074] 2 and 3 show the emulsified state of the samples according to Examples 1 to 3 and Comparative Examples 1, 3 to 8 using schematic diagrams. Along with these schematic diagrams, the observation results of the phase state of the samples are also shown in five levels according to the degree of emulsification, using the notations 1Lv, 2Lv, 3Lv, 4Lv, and 5Lv for ease of explanation.

[0075] The notation 1Lv means that no separation phenomenon was observed throughout the sample, and the sample was uniformly smooth throughout, forming a complete single-phase emulsion.

[0076] The notation 2Lv indicates that the sample has slightly less phase uniformity than the notation 1Lv, but the lower layer is in a slightly suspended state with no clear interface with the upper layer, and is emulsified with a slight separation that is not colorless and transparent.

[0077] The notation 3Lv indicates that the sample has slightly less phase uniformity than the notation 1Lv, but the lower layer has a clear interface with the upper layer and is emulsified with a slight separation that is colorless and transparent.

[0078] The designation 4Lv indicates that the sample is clearly separated into the gel phase and the water phase, but the separated water phase also contains some dispersed gel, and the gel phase in particular is aggregated with less unevenness than the designation 5Lv.

[0079] The notation 5Lv means that the sample is completely separated into two layers between the gelled and aqueous phases, with no dispersion of gel into the aqueous phase, and that the entire or most of the gelled phase is significantly aggregated with large variations, or that the entire sample is gelled and significantly aggregated with large variations.

[0080] <Results of Examples 1 to 3> Initial viscosity of emulsion composition (Pa·s): 0.8 (Example 1), 0.5 (Example 2), 0.4 (Example 3) Emulsion stability when prepared at room temperature: 〇 Emulsion stability one month after preparation (ambient temperature 50℃): 〇 In comparison with Example 1, the average particle size (μm) of the emulsion composition one month after preparation was 2.6 at an ambient temperature of 20°C and 3.7 at an ambient temperature of 50°C. Applicable to containers with spray nozzles (smooth and good spraying of emulsion composition while maintaining emulsion stability) ·Overall rating: 〇

[0081] <Results of Comparative Examples 1 to 7> Initial viscosity of emulsion composition (Pa s): 1.43 (Comparative Example 1), no increase in viscosity (Comparative Example 2), 1.10 (Comparative Example 3), 1.35 (Comparative Example 4), 1.22 (Comparative Example 5), 1.01 (Comparative Example 6), 1.01 (Comparative Example 7) Emulsion stability during preparation: Good (Comparative Example 1), Bad (Comparative Example 2), Good (Comparative Example 3), Good (Comparative Example 4), Fair (slight separation) (Comparative Example 5), Good (Comparative Example 6), Good (Comparative Example 7), Bad (Comparative Example 8) Emulsion stability one month after preparation (ambient temperature 20°C): Good (Comparative Example 1), not performed (Comparative Example 2), poor (Comparative Example 3), fair (significant gelation) (Comparative Example 4), poor (Comparative Example 5), poor (Comparative Example 6), good (Comparative Example 7) Emulsion stability one month after preparation (ambient temperature 50°C): △ (slight separation), not performed (Comparative Example 2), × (Comparative Example 3), △ (significant gelation and slight separation) (Comparative Example 4), × (Comparative Example 5), × (Comparative Example 6), × (Comparative Example 7)

[0082] Compared to Comparative Example 3, the average particle size (μm) of the emulsion composition one month after preparation was 2.4 at an ambient temperature of 20°C and 2.2 at an ambient temperature of 50°C. Compared to Comparative Example 7, the average particle size (μm) of the emulsion composition one month after preparation was 2.7 at an ambient temperature of 20°C and 2.5 at an ambient temperature of 50°C. Not suitable for use with containers equipped with spray nozzles (the emulsion composition will separate when sprayed out) ·Overall rating: ×

[0083] <Results of Comparative Examples 2 and 8> Emulsification: The mixture of the finely processed oily component, water (second purified water), and additives (pH adjuster, preservative) remained suspended during the preparation stage and did not emulsify (Comparative Example 2). Also, the mixture of the finely processed oily component, water (second purified water), and additives (pH adjuster, preservative) could not maintain an emulsified state after stirring and immediately separated (Comparative Example 8).

[0084] <Consideration> The samples of Examples 1 to 3 were emulsion compositions prepared based on the method for producing an emulsion composition according to the present embodiment. In the emulsion compositions of Examples 1 to 3, a finely processed oily component containing an oily component, glycerin, water (first purified water), and a surfactant was mixed with thickened water containing water (second purified water), additives (pH adjuster, preservative), a polymeric emulsifier (DPF) as a thickener, and bentonite as a thickening aid. Experimental results showed that for all of the samples of Examples 1 to 3, no separation of the emulsion composition was observed at room temperature, either at the time of preparation or 30 days after preparation, under either room temperature or high-temperature storage conditions. Furthermore, even when the emulsion composition was exposed to a high-temperature atmosphere (50°C) and in a state where it was prone to softening in the container, no separation of the emulsion composition was observed, and the emulsion stability was evaluated as good.

[0085] On the other hand, in Example 1, where the average particle size of a representative sample was measured, the average particle size of the components constituting the sample was 2.6 μm when the sample was prepared and 3.7 μm under high-temperature storage conditions. These average particle sizes were not significantly smaller than those of Comparative Examples 1 to 7. However, in Examples 1 to 3, even though the oily component content of the emulsion composition was 30 wt%, and a large amount of oily component was contained in the emulsion composition, the initial viscosity of the emulsion composition was significantly below 1.0 Pa·s. Therefore, the emulsion composition was able to be smoothly sprayed from the nozzle of the spray nozzle-type container. Furthermore, the emulsion composition that was sprayed showed no separation at all, and the emulsified phase state was uniformly smooth and formed a completely single phase (labeled 1Lv in Figure 2).

[0086] The reason for these results is believed to be that the emulsion compositions of Examples 1 to 3 contain a polymer emulsifier (DPF) consisting of crystalline cellulose, xanthan gum, and cellulose gum, and are produced by emulsification using a combination of D-phase emulsification and powder emulsification.

[0087] That is, the emulsion compositions of Examples 1 to 3 are prepared by mixing a finely processed oily component with thickened water, and then by powder emulsification, attaching crystalline cellulose contained in a polymer emulsifier to the interface between the finely processed oily component and the thickened water.The finely processed oily component is prepared by D-phase emulsification of sodium dilauroyl glutamate lysine (surfactant) and water to prevent Ostwald ripening, thereby producing an emulsion of caprylic / capric triglyceride (oil component).The resulting emulsion of the oily component is in a uniformly fine state, suppressing aggregation of sol particles.

[0088] On the other hand, the thickener contained in the thickened water is a mixture of a polymer emulsifier (DPF) consisting of crystalline cellulose, xanthan gum, and cellulose gum as the main component, with bentonite (a thickening aid) added as an auxiliary. Therefore, in the thickened water, the xanthan gum and cellulose gum contained in the polymer emulsifier (DPF) coexist with affinity without separating from each other. Therefore, to prevent the thickened water from becoming too viscous, the content of the polymer emulsifier (DPF) in the thickened water is set to 0.5 to 0.75 wt%. The synergistic thickening effects of the xanthan gum and cellulose gum individually thicken the solvent water (second purified water) stably, resulting in the thickened water having stable physical properties over time.

[0089] Furthermore, by mixing these finely processed oily components with thickened water, the crystalline cellulose contained in the polymer emulsifier (DPF) adheres to the interface with the emulsion of the oily components uniformly refined by the powder emulsification method, so that the emulsion of the oily components is covered and protected by the adhered crystalline cellulose. In particular, because powder emulsification irreversibly adheres crystalline cellulose to the interface of the emulsion of the oily components, the emulsion of the oily components protected by crystalline cellulose remains uniformly refined and stable over time.

[0090] Therefore, it is presumed that, in the emulsion compositions of Examples 1 to 3, even though their viscosities are below 1.0 Pa·s, emulsions of oily components protected by crystalline cellulose are produced in a uniformly finely divided state and in a stable state over time, and therefore a stable emulsified state can be maintained in the emulsion compositions.

[0091] Here, when the state of emulsification of the emulsion compositions of Examples 1 to 3 was actually confirmed by microscopic photographs (magnification 400), it was found that even after one month had passed since the emulsion composition samples were prepared and stored under conditions of an ambient temperature of 20°C, the samples were uniformly pulverized and remained stable over time, as shown in Figure 4. Furthermore, even after two months had passed since the emulsion composition samples were prepared and stored under conditions of an ambient temperature of 50°C, it was found that the samples were uniformly pulverized and remained stable over time, as shown in Figure 5.

[0092] Fig. 4 is a micrograph showing the state of emulsification using the emulsion composition according to the embodiment, taken immediately after preparation at an ambient temperature of 20°C. Fig. 5 is a micrograph showing the state of emulsification using the emulsion composition according to the embodiment, taken after storage at an ambient temperature of 50°C for two months after preparation.

[0093] On the other hand, the samples according to Comparative Examples 1 to 7 were mixtures prepared using a manufacturing method that used a thickener other than a polymer emulsifier (DPF), and Comparative Example 8 was a mixture that did not contain any thickener. The experimental results showed that, among the samples according to Comparative Examples 1, 3 to 7, only Comparative Example 1 and Comparative Example 7 showed no separation of the emulsion composition at room temperature, either at the time of preparation or 30 days after preparation, when stored at room temperature. The phase state of the samples according to Comparative Examples 1 and 7 was equivalent to that of the samples according to Examples 1 to 3, and they were uniformly smooth and formed a completely single phase (denoted as 1Lv in Figure 3).

[0094] However, in Comparative Examples 1, 3 to 7, which included six samples in total, including the emulsion compositions of Comparative Examples 1 and 7, all emulsion compositions separated under high-temperature storage conditions, and were unacceptable in terms of emulsion stability at 50° C. Therefore, the overall evaluation of the emulsion compositions of Comparative Examples 1, 3 to 7 was poor.

[0095] The reason for these results is that the thickener in the emulsion compositions (or mixtures) of the samples according to Comparative Examples 1 to 7 is not a polymer emulsifier (DPF) consisting of crystalline cellulose, xanthan gum, and cellulose gum. Therefore, it is believed that the emulsion compositions (or mixtures) of the samples according to Comparative Examples 1 to 7 could not be produced like the emulsion compositions of Examples 1 to 3, which were emulsified by a combination of D-phase emulsification and powder emulsification, due to the inclusion of a polymer emulsifier (DPF).

[0096] That is, increasing the viscosity of an emulsion composition tends to suppress separation. On the other hand, as mentioned above, when an emulsion containing 30 wt% of oily components is sprayed from a container through a spray nozzle while maintaining emulsion stability, the viscosity of the emulsion composition contained in the emulsion needs to be lower than approximately 1 to 1.5 Pa·s at most. Taking this into consideration, the emulsion compositions of Comparative Examples 1 to 7 were produced with initial viscosities of 1.01 to 1.43 Pa·s.

[0097] However, the thickener is xanthan gum in Comparative Example 1, crystalline cellulose in Comparative Example 2, and cellulose gum in Comparative Example 3. In all of the sample emulsion compositions according to Comparative Examples 1 to 3, the thickeners contained are some of the components of crystalline cellulose, xanthan gum, and cellulose gum contained in the polymer emulsifier (DPF), but the thickeners do not have the physical properties of the three components, crystalline cellulose, xanthan gum, and cellulose gum, that coexist.

[0098] On the other hand, even if an emulsion of an oily component produced by D-phase emulsification of sodium dilauramidoglutamide lysine (surfactant) and water during the production process of an emulsion composition is produced by suppressing aggregation of sol particles and uniformly finely dispersing the emulsion, in the cases of Comparative Examples 1 and 3, although the water solvent is thickened by the addition of a thickener, powder emulsification does not occur in the oily component emulsion, and the oily component emulsion is not protected by crystalline cellulose adhering to its interface, as in the emulsion compositions of Examples 1 to 3. Moreover, due to the synergistic effect of the thickening effects of xanthan gum and cellulose gum, the water solvent does not thicken to a stable state over time.

[0099] Therefore, it is presumed that, even though the emulsion compositions of the samples according to Comparative Examples 1 and 3 had viscosities of around 1.0 Pa·s, in the emulsions of oily components, the oil phase components easily penetrate into the surrounding aqueous phase, causing aggregation of sol particles and the size of the emulsion itself, making it impossible to maintain a stable emulsified state in the emulsion compositions, resulting in separation of the emulsion compositions.

[0100] In addition, in the case of Comparative Example 2, the mechanism and other reasons have not been clarified, but it is thought that this is because crystalline cellulose is unable to exert a sufficient thickening effect on water, which is the solvent in the emulsion composition containing water (second purified water), a pH adjuster (propanediol), a preservative, and bentonite (thickening aid).

[0101] Additionally, in the samples of Comparative Examples 4 to 7, the emulsion composition (or mixture) did not contain a polymeric emulsifier (DPF) consisting of crystalline cellulose, xanthan gum, and cellulose gum as a thickener. Therefore, even if the emulsion of the oily component produced by the D-phase emulsification method of sodium dilauroyl glutamate lysine (surfactant) and water during the production process of the emulsion composition was uniformly finely divided and suppressed sol particle aggregation, in the cases of Comparative Examples 4 to 8, the addition of the thickener thickened the water solvent, but powder emulsification did not occur in the oily component emulsion, as in the emulsion compositions of Examples 1 to 3, and the oily component emulsion was not protected by crystalline cellulose attached to its interface. Furthermore, due to the synergistic effect of the thickening properties of xanthan gum and cellulose gum, the water solvent did not thicken in a stable manner over time.

[0102] Therefore, it is presumed that, even though the emulsion compositions of the samples according to Comparative Examples 4 to 7 had viscosities of around 1.0 Pa·s, the oil phase components in the emulsions of oily components tend to penetrate into the surrounding aqueous phase, causing aggregation of sol particles and the size of the emulsion itself, making it impossible to maintain a stable emulsified state in the emulsion compositions, resulting in separation of the emulsion compositions.

[0103] In the sample mixture of Comparative Example 8, since no thickener was added, the solvent water and the oil phase component glycerin tended to remain separated, and it is thought that this was because the mixture did not emulsify in the first place during the production stage.

[0104] Next, the actions and effects of the emulsion composition according to this embodiment will be described.

[0105] (1) The emulsion composition according to this embodiment comprises a polyol having three or more hydroxyl groups in the molecule, a surfactant having 10 or more carbon atoms that generates an O / W (Oil in Water) emulsion with an HLB (Hydrophile-Lipophile Balance Value) value of 12 or more, an oily component, water, and a polymer emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum, and is characterized by being emulsified by a combination of a D-phase emulsification method and a powder emulsification method.

[0106] Due to this feature, even when a moisturizing agent (cosmetic) such as a milky lotion with a high content of oil components and excellent moisturizing effect is filled into a spray nozzle-type container, the emulsion composition according to this embodiment has physical properties that allow it to be sprayed smoothly without stagnation from the nozzle by pumping the container while maintaining emulsion stability, and therefore can be applied to cosmetics in such applications.

[0107] Incidentally, when an emulsion composition, which is the main component of a moisturizing agent (cosmetic) such as an emulsion, contains an oil component (oily component) at a content ratio of 30 wt%, as an example guideline, the cosmetic is generally considered to have excellent moisturizing effects. In the emulsion composition according to the present embodiment, even if the oil component content is 30 wt%, the emulsion composition can be adjusted to a viscosity and properties significantly below 1.0 Pa·s, which allows the emulsion composition to be sprayed from a spray nozzle by pumping the container. Therefore, even when a moisturizing agent (cosmetic) containing the emulsion composition according to the present embodiment is contained in a spray nozzle-type container, the user can easily apply the moisturizing agent (cosmetic) with excellent moisturizing effects to their hands by pumping the container in a manner generally similar to that of a relatively low-viscosity emulsion.

[0108] Therefore, the emulsion composition according to this embodiment has the excellent effect of improving emulsion stability even when a spray nozzle is used, and of being able to be sprayed from a nozzle while maintaining emulsion stability without reducing the blending amount of the oily component.

[0109] (2) The emulsion composition according to this embodiment is characterized in that the content of the polymer emulsifier in the emulsion composition is 0.1 wt % or more and 2 wt % or less.

[0110] Due to this feature, when the crystalline cellulose contained in polymer emulsifier (DPF) is attached to the interface of the emulsion of oily components that is uniformly refined based on powder emulsification method, the crystalline cellulose can be attached to the interface of the emulsion of oily components with a strong binding force that prevents the refined oily components and the thickened water from separating from each other.Therefore, in the emulsion composition of this embodiment, the emulsion of oily components protected by crystalline cellulose remains uniformly refined and remains stable over time.In addition, when the emulsion composition of this embodiment is sprayed, it does not become a high viscosity that prevents it from flowing through the well-known spray nozzle that is commonly used, and has the physical properties of viscosity that can flow smoothly through this spray nozzle.

[0111] If the content of the polymer emulsifier in the emulsion composition is less than 0.1 wt%, the crystalline cellulose cannot adhere to the interface of the emulsion of the oily component with a strong force due to the powder emulsification, and the binding force between the refined oily component and the thickened water is weak, so the refined oily component and the thickened water will separate from each other.On the other hand, if the content of the polymer emulsifier in the emulsion composition is more than 2 wt%, the emulsion composition will have a high viscosity that will prevent it from flowing through the spray nozzle, making it difficult to spray from the spray nozzle and unable to be used through the spray nozzle.

[0112] (3) The emulsion composition according to this embodiment is characterized in that the viscosity of the emulsion composition is 0.3 Pa·s or more and 1.0 Pa·s or less.

[0113] Due to this feature, the emulsion composition of this embodiment can be made into a moisturizer (cosmetic) such as an emulsion with excellent moisturizing effect, and therefore can satisfy both the first requirement that the oily component contained in the emulsion composition, which is the main component of the moisturizer, meets the required content ratio of 30 wt%, and the second requirement that the moisturizer can be adjusted to have physical properties that allow it to be sprayed from a spray nozzle-type container by pumping using a spray nozzle.

[0114] If the viscosity of the emulsion composition is less than 0.3 Pa·s, the oily components contained in the constituent components of the emulsion composition will not be sufficiently blended, and moisturizers (cosmetics) such as emulsions containing the emulsion composition will not be able to provide moisturizing effects such as moisturizing and softening to the skin to a degree that will satisfy many users. Conversely, if the viscosity of the emulsion composition exceeds 1.0 Pa·s, the emulsion composition will have such a high viscosity that it will be difficult to spray through the spray nozzle described above, making it difficult to spray from the spray nozzle and therefore unable to be used through a spray nozzle.

[0115] (4) Furthermore, the emulsion composition according to this embodiment is characterized in that the content of oily components in the emulsion composition is 5 wt % or more and 35 wt % or less.

[0116] Due to this feature, when the emulsion composition according to this embodiment is included in a moisturizer (cosmetic) such as an emulsion, the moisturizing effect of the moisturizer (cosmetic) is significantly enhanced by this emulsion composition, and the moisture and oil contained in the constituent components of the emulsion composition are sufficiently provided to human skin, making it possible to maintain the skin's moisture and flexibility.

[0117] If the content of oily components in the emulsion composition is less than 5 wt%, the oil contained in the constituent components of the emulsion composition will not be sufficiently blended, and moisturizers (cosmetics) such as emulsions containing the emulsion composition will not be able to provide moisturizing effects such as moisturizing and softening to the skin to a degree that will satisfy many users. Conversely, if the content of oily components in the emulsion composition exceeds 35 wt%, the emulsion composition will have a high viscosity that will hinder its flow through the aforementioned spray nozzle, making it difficult to spray from the spray nozzle and making it impossible to use through a spray nozzle.

[0118] Furthermore, in the cosmetic preparation according to this embodiment, the emulsion composition according to any one of (1) to (4) is used as a main ingredient, and at least one or more auxiliary ingredients are blended therein. The auxiliary ingredients include ascorbic acid, L-ascorbic acid 2-glucoside, ε-aminocaproic acid, allantoin, isopropylmethylphenol, estradiol, oryzanol camphor, dipotassium glycyrrhizinate, monoammonium glycyrrhizinate, β-glycyrrhetinic acid, stearyl glycyrrhetinate, salicylic acid, zinc oxide, ascorbyl dipalmitate, tetroxide, and the like. The active ingredient is at least one of ascorbyl 2-hexyldecanoate, tocopherol acetate, tocopherol nicotinate, tranexamic acid, niacinamide, nicotinamide, urea, vitamin A oil, hinokitiol, placenta extract, benzalkonium chloride, menthol, retinol palmitate, glycine betaine, amino acids, N-amidino-L-proline, plant extract, essential oil, ceramide, or cholesteryl ester.

[0119] Due to this feature, the cosmetic according to this embodiment exhibits an excellent moisturizing effect due to the emulsion composition, and is able to provide human skin with sufficient moisture and oil contained in the constituent components of the emulsion composition, thereby providing moisture and softness to the skin.

[0120] Furthermore, the method for producing an emulsion composition according to this embodiment is characterized by comprising the following steps: a first step of producing an emulsion of an oily component by a D-phase emulsification method using a polyol having three or more hydroxyl groups in the molecule, a surfactant having 10 or more carbon atoms that generates an O / W (Oil in Water) emulsion with an HLB (Hydrophile-Lipophile Balance Value) value of 12 or more, and first water required for emulsification, thereby producing a finely-processed oily component; a second step of adding a polymeric emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum to a second water solvent separately from the first water, and stirring the second water and the polymeric emulsifier to produce thickened water in which the second water is thickened with the xanthan gum and cellulose gum; and a third step of mixing the finely-processed oily component and the thickened water, and attaching the crystalline cellulose contained in the polymeric emulsifier to the interface between the finely-processed oily component and the thickened water by a powder emulsification method.

[0121] This feature allows the emulsion composition suitable for such cosmetics to be prepared with properties that allow it to be sprayed from a nozzle by pumping the container, even when a moisturizing agent (cosmetic) such as an emulsion with a high oil component content and excellent moisturizing effect is filled into a spray nozzle-type container. That is, the emulsion composition prepared by the method for producing an emulsion composition according to this embodiment can be adjusted to have properties that allow it to be sprayed from a nozzle by pumping the container, even when the oil component content reaches 30 wt%. Therefore, even when the moisturizing agent (cosmetic) containing the prepared emulsion composition is contained in a spray nozzle-type container, the user can easily apply the moisturizing agent (cosmetic) with excellent moisturizing effect to their hands by pumping the container in a manner generally similar to that of a moisturizing agent with a relatively low viscosity.

[0122] Therefore, the method for producing an emulsion composition according to this embodiment has the excellent effect of improving emulsion stability even when a spray nozzle is used, and making it possible to achieve a state that allows the emulsion to be sprayed from a nozzle while maintaining emulsion stability without reducing the blending amount of the oily component.

[0123] Furthermore, the method for producing an emulsified composition according to this embodiment is characterized in that the content ratio of the finely treated oily component to the thickened water is 10 wt% to 50 wt% of the finely treated oily component and 90 wt% to 50 wt% of the thickened water.

[0124] Due to this feature, the produced emulsion composition can be adjusted to have physical properties that allow it to be sprayed smoothly from the nozzle of a spray-type nozzle-type container without stagnation, as described above. In particular, the emulsion composition according to this embodiment can be used to make a moisturizing agent (cosmetic) such as an emulsion having excellent moisturizing effect, and therefore can satisfy both the moisturizing effect requirement of satisfying the content ratio of the required oily component in the emulsion composition, which is the main component of the moisturizing agent, and the nozzle flow requirement of adjusting the physical properties so that the moisturizing agent can be sprayed from the nozzle by pumping a spray-type nozzle-type container using a spray nozzle.

[0125] Furthermore, if the content ratio of the finely processed oily component and the thickened water deviates from 10 wt% to 50 wt% for the finely processed oily component and 90 wt% to 50 wt% for the thickened water, it becomes impossible to achieve both the moisturizing effect requirement and the nozzle flow requirement. Therefore, when using a spray nozzle, it is not possible to improve the emulsion stability while maintaining the emulsion stability without reducing the amount of oily component blended, and to achieve a state that can be sprayed from the nozzle.

[0126] In the method for producing an emulsion composition according to the present embodiment, a silicate anion (chemical formula: [SiO 2+n ] 2n- It is characterized by the addition of a silicate mineral (thickening aid) consisting of subunits of

[0127] Due to this feature, when the refined oily component and the thickened water are mixed, the plate-like crystals interlock to form a card-house structure, so that in the emulsion of the oily component, the oil phase component is easily surrounded and held by the surrounding aqueous phase. Therefore, the emulsion of the oily component protected by crystalline cellulose can be maintained in a uniformly refined state and in a stable state over time.

[0128] The present invention has been described above in accordance with Examples 1 to 3 of the embodiment and Comparative Examples 1 to 8, but the present invention is not limited to Examples 1 to 3 of the embodiment described above, and can be modified and applied as appropriate within the scope of the gist of the present invention.

Claims

1. a polyol having three or more hydroxyl groups in the molecule; a surfactant having 10 or more carbon atoms and having an HLB (Hydrophile-lipophile balance value) value of 12 or more, which generates an O / W (Oil in Water) emulsion; Oily ingredients and Water and a polymer emulsifier comprising crystalline cellulose, xanthan gum, and cellulose gum, and emulsified by a combination of a D-phase emulsification method and a powder emulsification method; the polyol is glycerin, and the surfactant is sodium dilauroyl glutamate lysine; the oily component includes at least one of caprylic / capric triglyceride, mineral oil, jojoba seed wax, olive oil, sunflower seed oil, octyldodecyl myristate, cetyl ethylhexanoate, ethylhexyl palmitate, and isopropyl myristate; A method for producing an emulsion composition, comprising:

2. The method for producing an emulsion composition according to claim 1, the content of the polymer emulsifier in the emulsion composition is 0.1 wt % or more and 2 wt % or less; A method for producing an emulsion composition, comprising:

3. The method for producing an emulsion composition according to claim 1, the viscosity of the emulsion composition is 0.3 Pa s or more and 1.0 Pa s or less; A method for producing an emulsion composition, comprising:

4. The method for producing an emulsion composition according to claim 1, the content of the oily component in the emulsion composition is 5 wt % or more and 35 wt % or less; A method for producing an emulsion composition, comprising:

5. a polyol having three or more hydroxyl groups in the molecule; a first step of producing an emulsion of an oily component by a D-phase emulsification method using a surfactant having 10 or more carbon atoms that produces an O / W (Oil in Water) emulsion with an HLB (Hydrophile-lipophile balance value) value of 12 or more and first water required for emulsification, thereby producing a finely treated oily component in which the oily component has been finely refined; a second step of adding a polymer emulsifier consisting of crystalline cellulose, xanthan gum, and cellulose gum to second water as a solvent separately from the first water, and stirring the second water and the polymer emulsifier to thicken the second water with the xanthan gum and the cellulose gum to prepare thickened treated water; a third step of mixing the finely treated oily component with the thickened water and adhering the crystalline cellulose to the interface between the finely treated oily component and the thickened water by a powder emulsification method; the polyol is glycerin, and the surfactant is sodium dilauroyl glutamate lysine; the oily component includes at least one of caprylic / capric triglyceride, mineral oil, jojoba seed wax, olive oil, sunflower seed oil, octyldodecyl myristate, cetyl ethylhexanoate, ethylhexyl palmitate, and isopropyl myristate; In the third step, the finely treated oily component is diluted with the mixed thickened water, so that the content of the oily component in the emulsion composition is adjusted to 30 wt % from the content of the oily component in the finely treated oily component. A method for producing an emulsion composition, comprising:

6. 6. The method for producing an emulsion composition according to claim 5, In the second step, silicate anion (chemical formula: [SiO ２＋ｎ ] ２ｎ－ ) a silicate mineral consisting of a subunit is added, A method for producing an emulsion composition, comprising:

Images