Oil-based emulsions in water

Abstract

Provided is an oil-in-water type emulsion composition that has a feeling of stiffness immediately after coating, maintains the feeling of stiffness, has stability over time, and furthermore has excellent non-stickiness. 【Solution means】The following components (A) to (D); (A) Polyvinyl alcohol, (B) Dimethylsilylated silica, (C) At least one or more of (c1) to (c3); (c1) A hydrocarbon oil having a kinematic viscosity at 98.9 °C of 3,000 mm 2 / s or more, (c2) An ester oil having a melting point of 30 °C to 50 °C, (c3) A polar wax having a melting point of 55 °C or higher, (D) A non-polar oil that is liquid at 25 °C (however, excluding (c1)) An oil-in-water type emulsion composition containing the above components.

Description

[Technical Field]

[0001] This invention relates to an oil-in-water emulsion composition. [Background technology]

[0002] As people age, their skin loses elasticity, leading to wrinkles, sagging, and other signs of aging. Many cosmetics have been released targeting people experiencing these symptoms, aiming to replenish moisture, add radiance, and lift sagging skin. Traditionally, these cosmetics have incorporated polyvinyl alcohol (PVA) to provide a firming effect after application. However, in recent years, there has been an increasing demand for cosmetics that offer not only immediate firmness but also sustained effects, creating a need for cosmetics that provide long-lasting firmness.

[0003] For example, Patent Document 1 discloses a technology for an emulsified cosmetic that contains a specific amount of polyvinyl alcohol, a specific amount of polyethylene glycol with a molecular weight of 15,000 to 25,000, a higher fatty acid, and a neutralizing agent, and has good firmness without stickiness. Patent Document 2 discloses a technology for an emulsified topical skin preparation that contains a specific amount of a water-soluble polymer mainly composed of polyvinyl alcohol, a solid to semi-solid oil containing a higher aliphatic alcohol, a glycerin fatty acid monoester, and a polyoxyethylene (2 to 50 molar added) alkyl ether in specific proportions, and has excellent firmness and plumpness. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2011-126787 [Patent Document 2] Japanese Patent Publication No. 2011-148716 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, the emulsified cosmetic technology described in Patent Document 1, while providing a firming sensation, sometimes resulted in stickiness due to the inclusion of polyethylene glycol, and also suffered from insufficient stability at high temperatures. The emulsified topical skin preparation technology described in Patent Document 2, while providing excellent plumping effects through a combination of polyvinyl alcohol and solid to semi-solid oils containing higher aliphatic alcohols, lacked sufficient firmness immediately after application and was not satisfactory in terms of non-stickiness. Furthermore, neither Patent Document 1 nor Patent Document 2 focused on the aspect of sustained firmness. [Means for solving the problem]

[0006] As a result of further diligent research, the inventors have found that the oil-in-water emulsion composition of the present invention exhibits excellent firmness immediately after application, sustained firmness, good stability over time, and superior non-stickiness.

[0007] In other words, the present invention is as described below. [1] The following components (A) to (D); (A) Polyvinyl alcohol (B) Dimethylsilylated silica (C)(c1)~(c3) at least one of these; (c1) Kinematic viscosity at 98.9℃ is 3,000 mm 2 / s or higher hydrocarbon oil (c2) Ester oil with a melting point of 30°C to 50°C (c3) Polar wax with a melting point of 55°C or higher (D) Non-polar oils that are liquid at 25°C (except for (c1)) An oil-in-water emulsion composition containing the following: [2] The oil-in-water emulsion composition according to [1], wherein the mass ratio of component (D) to the total mass of component (C) and component (D) (D) is 0.1 to 0.6 (D / {(C)+(D)}). [3] The oil-in-water emulsion composition according to [1] or [2], wherein component (D) is a non-volatile oil. [4] The oil-in-water emulsion composition according to [1] or [2], wherein component (c2) is at least one of fatty acid sterol esters and fatty acid triglycerides. [5] The oil-in-water emulsion composition according to [1] or [2], wherein the oil-in-water emulsion composition is a cosmetic. [Effects of the Invention]

[0008] The present invention provides an oil-in-water emulsion composition that offers excellent firmness immediately after application, sustained firmness, and long-term stability, as well as excellent non-stickiness. [Modes for carrying out the invention]

[0009] Preferred embodiments of the present invention will be described in detail below. However, the present invention is not limited to the following preferred embodiments and can be freely modified within the scope of the present invention. In this specification, percentages are expressed in mass unless otherwise specified. In this specification, when a numerical range is expressed using "~", the range includes the numbers at both ends. In addition, the upper limit (less than or equal to) and lower limit (greater than or equal to) of each numerical range (~) can be arbitrarily combined as desired. In this specification, an oil-in-water emulsion composition is also simply referred to as a composition.

[0010] This invention contains component (A) polyvinyl alcohol. Polyvinyl alcohol is a commonly used aqueous film-forming component and can be obtained by saponifying polyvinyl acetate. Any type commonly used in cosmetics can be used. The viscosity of a 4% aqueous solution of component (A) polyvinyl alcohol at 20°C is not particularly limited, but from the viewpoint of firmness immediately after application and the duration of that firmness, the lower limit is 15 mm. 2 Preferably 25mm or more / s 2 A rate of / s or higher is preferable. The upper limit is 80mm. 2 Preferably less than / s, and 70mm 2 A value of less than / s is preferable. The range is 15mm. 2 / s~80mm 2 / s is preferred, 25mm 2 / s ~ 70 mm 2 / s is more preferable. The viscosity can be measured by a falling ball viscometer. Examples of commercially available products include Gosenol EG-40C, Gosenol EG-05 (both manufactured by Mitsubishi Chemical Corporation), Kuraray Poeval 204C, Kuraray Poeval 205C, Kuraray Poeval 220C (all manufactured by Kuraray Co., Ltd.), and the like.

[0011] The content of component (A) used in the present invention is not particularly limited. However, with respect to the total amount of the composition, the lower limit is preferably 0.1% by mass (hereinafter referred to as “%”) or more, more preferably 0.2% or more, and even more preferably 0.3% or more. The upper limit is preferably 1% or less, more preferably 0.9% or less, and even more preferably 0.8% or less. The range is preferably 0.1 to 1%, more preferably 0.2 to 0.9%, and even more preferably 0.3 to 0.8%. Within this range, it is more preferable from the viewpoints of the stiffness feeling immediately after coating and the persistence of the stiffness feeling.

[0012] The present invention contains component (B), dimethylsilylated silica. Dimethylsilylated silica is one in which the surface of silica has been dimethylsilylated, and any one can be used as long as it is usually used in cosmetics. Furthermore, the dimethylsilylated silica used in the present invention is not particularly limited in terms of its shape, size, particle structure, etc., and it can be used in any form such as fumed, spherical, plate-like, porous, or non-porous. The dimethylsilylation treatment is not particularly limited, but it can be carried out by a usual surface treatment method using a silicone compound such as a reactive organosilane or organosilazane. Specific examples of the silicone compound used include dimethyldichlorosilane. The average particle diameter of component (B) is not particularly limited, but from the viewpoints of the stiffness feeling immediately after coating, the persistence of the stiffness feeling, and non-stickiness, it is preferably 1 to 50 nm, and more preferably 5 to 30 nm. The average particle diameter can be measured, for example, by an image analysis method of a transmission electron microscope image. Examples of commercially available products include AEROSIL R972, AEROSIL R974, AEROSIL R976 (manufactured by Nippon Aerosil Co., Ltd.), and the like.

[0013] Although the content of component (B) used in the present invention is not particularly limited, as the lower limit with respect to the total amount of the composition, 0.1% or more is preferable, 0.15% or more is more preferable, and 0.2% or more is even more preferable. As the upper limit, 1% or less is preferable, 0.8% or less is more preferable, and 0.6% or less is even more preferable. As the range, 0.1 to 1% is preferable, 0.15 to 0.8% is more preferable, and 0.2 to 0.6% is even more preferable. Within this range, it is more preferable from the viewpoints of the firmness immediately after coating and the persistence of the firmness.

[0014] The present invention contains, as component (C), at least one or more of components (c1) to (c3). Component (C) is (c1) a hydrocarbon oil having a kinematic viscosity at 98.9 °C of 3,000 mm 2 / s or more, (c2) an ester oil having a melting point of 30 °C to 50 °C, and (c3) a polar wax having a melting point of 55 °C or more, and is at least one or more of them.

[0015] The hydrocarbon oil having a kinematic viscosity at 98.9 °C of 3,000 mm 2 / s or more for component (c1) is not particularly limited as long as it is usually used in cosmetics. For example, hydrogenated polyisobutene (drug product name: heavy liquid isoparaffin) can be mentioned. As the kinematic viscosity of component (c1), as long as it is 3,000 mm 2 / s or more, it is not particularly limited, but as the lower limit, 4,000 mm 2 / s or more is more preferable. As the upper limit, 6,000 mm 2 / s or less is preferable, and 5,500 mm 2 / s or less is more preferable. As the range, 3,000 mm 2 / s to 6,000 mm 2 / s is preferable, and 4,0,00 mm 2 ] / s to 5,500 mm 2 / s is more preferable. As a commercially available product, Pearl Rim 46 (4200 - 5000 mm 2Examples include s (98.9℃, manufactured by NOF Corporation). Kinematic viscosity can be measured using a Canon-Fenske viscometer in accordance with JIS K 2283.

[0016] The component (c2) used in this invention, an ester oil with a melting point of 30°C to 50°C, can be any ester oil commonly used in cosmetics. Examples of ester oils include fatty acid sterol esters, fatty acid triglycerides, esters of fatty acids and alcohols, N-acyl amino acid esters, fatty acid polyglycerol esters, and dipentaerythritol fatty acid esters. Specifically, examples include tetra(hydroxystearic acid / isostearate) dipentaerythrityl (melting point: 50°C), hexahydroxystearic acid dipentaerythrityl (melting point: 45°C), tri(caprylic / capric acid / myristic acid / stearic acid) glyceryl (melting point: 40°C), hexa(hydroxystearic acid / stearic acid / rosin acid) dipentaerythrityl (melting point: 37°C), phytosteryl oleate (melting point: 33°C), macadamia nut oil fatty acid phytosteryl (melting point: 45°C), dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl) (melting point: 40°C), dimer dilinoleyl dimer dilinoleate bis(behenyl / isostearyl / phytosteryl) (melting point: 40°C), shea butter (melting point: 33°C), etc. Among these, at least one of fatty acid sterol esters and fatty acid triglycerides is preferred from the viewpoint of firmness immediately after application, duration of firmness, and lack of stickiness, and it is even more preferred to be phytosteryl oleate (melting point: 33°C), macadamia nut oil fatty acid phytosteryl (melting point: 45°C), or shea butter (melting point: 33°C). Commercially available products include Rysterol SL (phytosteryl oleate, manufactured by Tsukuno Rice Fine Chemical Co., Ltd.), PLANDOOL-MAS (phytosteryl macadamia nut oil fatty acid, manufactured by Nippon Seika Co., Ltd.), and Lipex Shea (shea butter, manufactured by Aarhus Kar Ishamn).

[0017] The polar wax component (c3) used in this invention, which has a melting point of 55°C or higher, is a wax other than a hydrocarbon wax. The melting point of component (c3) is not particularly limited as long as it is 55°C or higher, but from the viewpoint of firmness immediately after application, duration of firmness, and lack of stickiness, the lower limit is more preferably 60°C or higher. The upper limit is preferably 95°C or lower, and more preferably 90°C or lower. The range is preferably 55°C to 95°C, and more preferably 60°C to 90°C. Specifically, examples include beeswax (melting point: 63°C), rice bran wax (melting point: 78°C), and candelilla wax (melting point: 72°C). Commercially available products include WHITE BEES WAX (beeswax, manufactured by Miki Chemical Co., Ltd.), Rice Wax SS-I (rice bran wax, manufactured by Tsukuno Rice Fine Chemical Co., Ltd.), and Refined Candelilla Wax SR-3 (candelilla wax, manufactured by Nippon Natural Products Co., Ltd.).

[0018] In this invention, the melting point is measured by the method described in Method 3 of the General Test Methods for Cosmetic Raw Materials Standards. Specifically, the sample is gradually heated to 90-92°C while stirring to melt it, then the heating is stopped and the sample is allowed to cool to a temperature 8-10°C above its melting point. Next, the thermometer (a petrolatum melting point thermometer as specified in Japanese Industrial Standard B7410) is cooled to 5°C, the moisture is wiped off with filter paper, half of the mercury bulb is inserted into the sample, and then immediately removed. The sample is kept vertical and allowed to cool. When the attached sample becomes cloudy, it is immersed in water at a temperature of 16°C or lower for 5 minutes. Next, the thermometer is inserted into the test tube and secured with a cork so that the distance between the lower end of the thermometer and the bottom of the test tube is 15 mm. The test tube is placed in a 500 mL beaker containing water at approximately 16°C, with the bottom of the test tube fixed 15 mm from the bottom of the beaker. The water bath is heated at a rate of 2°C per minute until the water bath reaches 30°C. Then, heating is continued at a rate of 1°C per minute, and the temperature is measured when a drop of the sample leaves the thermometer. This test is performed three times. If the difference in measurements is less than 1°C, the average value is taken. If the difference is 1°C or more, five measurements are taken and the average value is taken.

[0019] The component (C) used in the present invention is not particularly limited, but from the viewpoint of non-greasy properties, it is preferable to select it from component (c1) hydrogenated polyisobutene, component (c2) phytosteryl oleate, macadamia nut oil fatty acid phytosteryl, shea butter, and component (c3) rice bran wax.

[0020] The component (C) used in the present invention may be a combination of two or more components (c1) to (c3). When component (c3) is included, it is preferable to use it in combination with component (c1) and / or component (c2) from the viewpoint of non-stickiness, etc.

[0021] The content of component (C) used in the present invention is preferably 3% or more, more preferably 4% or more, and even more preferably 5% or more, relative to the total amount of the composition. The upper limit is preferably 20% or less, more preferably 15% or less, and even more preferably 12% or less. The range is preferably 3-20%, more preferably 4-15%, and even more preferably 5-12%. This range is more preferable in terms of firmness immediately after application.

[0022] Component (D) used in the present invention is a non-polar oil that is liquid at 25°C (except for (c1)). A non-polar oil that is liquid at 25°C is an oil that does not have polarity, and any oil commonly used in cosmetics can be used, regardless of its origin (animal oil, vegetable oil, synthetic oil, etc.) or its physical properties (non-volatile oil, volatile oil, etc.), including hydrocarbon oils and silicone oils. Specifically, examples include hydrocarbon oils such as mineral oil, hydrogenated polydecene, squalane, polybutene, and hydrogenated polyisobutene, and silicone oils such as low-polymerization dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, and fluorine-modified organopolysiloxane. Among these, hydrocarbon oils are preferred from the viewpoint of non-greasyness and long-term stability, and selection from hydrogenated polydecene and mineral oil is more preferred. Commercially available products include KF-96-10CS (methylpolysiloxane, manufactured by Shin-Etsu Chemical Co., Ltd.), Pearlream 6 (hydrogenated polyisobutene (quasi-drug labeling name; liquid isoparaffin), manufactured by NOF Corporation), SILKFLO 364 (hydrogenated polydecene, manufactured by LIPO CHEMICALS), and CARNATION (mineral oil, manufactured by SONNEBORN LLC).

[0023] The component (D) used in the present invention is not particularly limited, but from the viewpoint of non-stickiness and long-term stability, a non-volatile oil is preferred in terms of physical properties.

[0024] The content of component (D) used in the present invention is preferably 1% or more, more preferably 1.5% or more, and even more preferably 2% or more, relative to the total amount of the composition. The upper limit is preferably 8% or less, more preferably 7% or less, and even more preferably 6% or less. The range is preferably 1-8%, more preferably 1.5-7%, and even more preferably 2-6%. This range is more preferable in terms of non-stickiness and long-term stability.

[0025] The mass ratio of component (D) to the total mass of component (C) and component (D) used in the present invention, (D) / {(C)+(D)}, is not particularly limited, but the lower limit is preferably 0.1 or higher, preferably 0.15 or higher, and more preferably 0.2 or higher. The upper limit is preferably 0.6 or lower, preferably 0.5 or lower, and more preferably 0.4 or lower. The range is preferably 0.1 to 0.6, more preferably 0.15 to 0.5, and even more preferably 0.2 to 0.4. This range is more preferable in terms of firmness immediately after application, lack of stickiness, and stability over time.

[0026] In addition to the essential components mentioned above, the oil-in-water emulsion composition of the present invention contains aqueous components such as water and lower alcohols as components constituting the aqueous phase. Furthermore, components commonly used in cosmetics may be included as needed, within a quantitative and qualitative range that does not impair the effects of the present invention. For example, surfactants, oils other than components (C) and (D), powders other than component (B), UV absorbers, humectants, colorfastness inhibitors, antioxidants, defoamers, cosmetic ingredients, preservatives, fragrances, etc.

[0027] The aqueous component is not particularly limited, as long as it is water and water-soluble components commonly used in cosmetics, quasi-drugs, pharmaceuticals, etc. Examples of water include purified water, hot spring water, ion-exchanged water, deep-sea water, tap water, or steam-distilled water from plants, and one or more types can be appropriately selected and used as needed. Plant extracts such as aloe vera, witch hazel, witch hazel, cucumber, lemon, lavender, and rose water may also be used. In this invention, the water content is not particularly limited, but is preferably 20% to 85% of the total composition, and more preferably 30% to 75%. This range is preferable because it provides excellent non-stickiness and long-term stability. Examples of water-soluble components include glycols such as propylene glycol, 1,3-butylene glycol, dipropylene glycol, and polyethylene glycol; glycerols such as glycerin, diglycerin, and polyglycerin; sugar alcohols such as sorbitol, maltitol, and glucose; lower alcohols such as ethanol; and amphiphilic humectants such as PPG-14 polyglyceryl-2 ether, glycereth-26, and methyl gluceth-10.

[0028] Any surfactant commonly used in cosmetics can be used as the surfactant, including nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. Specifically, nonionic surfactants include PEG-40 stearate, PEG-55 stearate, glyceryl stearate, polysorbate 60, and polysorbate 80; anionic surfactants include stearic acid, stearoyl glutamic acid, and sodium dilauramidoglutamidolinate; cationic surfactants include dicocoylethyl hydroxyethylmonium methosulfate and behentrimonium chloride; and amphoteric surfactants include phospholipids. In particular, in the present invention, from the viewpoint of long-term stability, it is preferable to contain at least one of the nonionic, anionic, or amphoteric surfactants. The surfactant content is not particularly limited, but it is preferably 0.1 to 5% and more preferably 0.1 to 4% of the total amount of the composition. Within this range, it is preferable because it maintains non-stickiness while providing excellent long-term stability.

[0029] Oily components other than components (C) and (D) include ester oils, higher alcohols, fluorinated oils, oily gelling agents, etc., regardless of their origin (animal oils, vegetable oils, synthetic oils, etc.) or their properties (solid oils, semi-solid oils, liquid oils, etc.). Specifically, diisobutyl adipate, isocetyl isostearate, trimethylolpropane triisostearate, cetyl tri-2-ethylhexanoate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, ethyl oleate, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, palmitic acid Examples include 2-heptyl undecyl hydroxystearate, cholesteryl 12-hydroxystearate, dipentaerythritol fatty acid esters, isopropyl myristate, octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, diisostearyl malate, glyceryl tri-2-ethylhexanoate, and other ester oils; higher alcohols such as stearyl alcohol, cetyl alcohol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, and behenyl alcohol; fluorinated oils such as perfluorodecane, perfluorooctane, and perfluoropolyether; and oily gelling agents such as starch fatty acid esters, 12-hydroxystearic acid, and calcium stearate.

[0030] Other powders besides component (B) are not particularly limited in terms of shape (plate-like, spindle-like, needle-like, etc.), particle size (fine particles, pigment grade, etc.), particle structure (porous, non-porous, etc.), etc., and include inorganic powders, organic powders, composite powders, etc. Specifically, examples include inorganic powders such as synthetic fluorphlogopite and titanium dioxide, organic powders such as magnesium stearate, zinc stearate, N-acyllysine, cellulose, starch, and silk, and composite powders such as fine-particle titanium dioxide-containing silicon dioxide and fine-particle zinc dioxide-containing silicon dioxide, and one or more of these can be used. Furthermore, composites of one or more of these powders may be used. The surface may be coated with a surface treatment agent, and as a surface treatment agent, specifically, a known method of surface coating using inorganic substances such as silica and alumina, or organic substances such as triethoxyalkylsilane, organic titanate, N-acyl amino acid, amino acid, phospholipid, silicone, metallic soap, surfactant, oil, hydrocarbon, etc. The surface treatment agent may be applied by coating with one or more types in combination.

[0031] UV absorbers include components other than components (C), (D) and oily components, such as ethylhexyl methoxycinnamate, ethylhexyl salicylate, dimethyldiethyl benzalmalonate, diethylamino hydroxybenzoyl hexyl benzoate, methylene bisbenzotriazolyltetramethylbutylphenol, 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1 Examples of moisturizing agents include 3,5-triazine, octocrylene, 4-tert-butyl-4'-methoxydibenzoylmethane, etc. Examples of antioxidants include α-tocopherol, ascorbic acid, etc. Examples of beauty ingredients include vitamins, anti-inflammatory agents, herbal medicines, etc. Examples of preservatives include parahydroxybenzoic acid esters, phenoxyethanol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, ethylhexylglycerin, etc.

[0032] The oil-in-water emulsion composition of the present invention can be manufactured according to conventional methods. Specifically, for example, components (B), (C), and (D) are mixed to prepare an oil phase. Then, an aqueous phase containing component (A) is added to the oil phase and mixed and dispersed to obtain the composition of the present invention.

[0033] The oil-in-water emulsion composition of the present invention may be used as is as the final formulation. Examples of the final formulation include cosmetics, topical skin preparations, and pharmaceuticals. Specifically, examples include skincare cosmetics such as lotions, emulsions, creams, and balms; makeup cosmetics such as sunscreens, foundations, and primers; overcoat cosmetics; and topical skin preparations such as lotions and liniments. In the present invention, the final formulation can be suitably used in cosmetics that provide the effects of the present invention, such as a firming sensation immediately after application and a sustained firming effect, and is particularly suitable for use in skincare cosmetics such as emulsions and creams for the eye and mouth areas.

[0034] When the oil-in-water emulsion composition of the present invention is included in the cosmetic or topical skin preparation, the content of the oil-in-water emulsion composition of the present invention is not particularly limited, but is preferably 0.001 to 100%.

[0035] The viscosity of the oil-in-water emulsion composition of the present invention is not particularly limited, but from the viewpoint of stability over time, the viscosity at 30°C measured using a Brookfield rotational viscometer is preferably 4,000 mPa·s or higher as a lower limit, and more preferably 5,000 mPa·s or higher. Furthermore, the viscosity at 30°C measured using a viscosity meter (manufactured by Nippon Oil & Test Machinery Co., Ltd.) with a No. 2 aluminum cone in accordance with JIS-K2220 is preferably 330 mm or less, and more preferably 315 mm or less.

[0036] Furthermore, the present invention may include the following inventions. [1] The following components (A) to (D); (A) Polyvinyl alcohol (B) Dimethylsilylated silica (C)(c1)~(c3) at least one of these; (c1) Kinematic viscosity at 98.9℃ is 3,000 mm 2 / s or higher hydrocarbon oil (c2) Ester oil with a melting point of 30°C to 50°C (c3) Polar wax with a melting point of 55°C or higher (D) Non-polar oils that are liquid at 25°C (except for (c1)) An oil-in-water emulsion composition containing the following: [2] The oil-in-water emulsion composition according to [1], wherein the mass ratio of component (D) to the total mass of component (C) and component (D) (D) is 0.1 to 0.6 (D / {(C)+(D)}). [3] The oil-in-water emulsion composition according to [1] or [2], wherein component (D) is a non-volatile oil. [4] The oil-in-water emulsion composition according to [1] to [3], wherein component (c2) is at least one of fatty acid sterol esters and fatty acid triglycerides. [5] The oil-in-water emulsion composition according to [1] to [4], wherein the oil-in-water emulsion composition is a cosmetic. [Examples]

[0037] The present invention will be described in detail below with reference to examples. These examples are not intended to limit the present invention in any way. Furthermore, the content of each component described in the examples represents the pure content.

[0038] Examples 1-15 and Comparative Examples 1-6: Creamy beauty serum (oil-in-water emulsion type) Creamy serums were prepared according to the formulations shown in Tables 1 and 2 below, and evaluated for (a) firmness immediately after application, (b) duration of firmness, (c) non-stickiness, and (d) stability over time using the evaluation methods described below. The results are also shown in Tables 1 and 2.

[0039] [Table 1] *1: Gosenor EG-40C (manufactured by Mitsubishi Chemical Corporation) *2: AEROSIL R972 (average particle size: 7nm, manufactured by Nippon Aerosil Co., Ltd.) *3: Godball D11-796C (average particle size: 4 μm, manufactured by Suzuki Oil & Fat Industry Co., Ltd.) *4: Pearlream 46 (kinematic viscosity (98.9℃) 4,200~5,000 mm 2 (Manufactured by NOF Corporation) *5: Rysterol ester (melting point approximately 40°C, manufactured by Tsukuno Rice Fine Chemicals Co., Ltd.) *6: PLANDOOL-MAS (melting point approximately 45°C, manufactured by Nippon Seika Co., Ltd.) *7: Lipex shear (melting point 33°C, manufactured by Aarhus Karlshamn Sweden AB) *8: Rice wax SS-I (melting point approximately 80°C, manufactured by Boso Oil & Fat Co., Ltd.) *9: Technol HM (melting point 53℃, manufactured by Yokozeki Oil & Fat Industry Co., Ltd.) *10: MULTIWAX W445 (manufactured by SONNEBORN, LLC) *11: SILKFLO 364 (manufactured by LIPO CHEMICALS INC.) *12: CARNATION (manufactured by SONNEBORN, LLC)

[0040] [Table 2]

[0041] (Manufacturing Method) (Manufactured using the raw materials with the ingredient numbers listed.) A. Components (1) to (3) and components (7) to (23) were uniformly dissolved at 70°C. Component (4) was added to BA and uniformly mixed and dispersed at 70°C. Cool C:B to 40°C, add components (5) to (6) and components (24) to (26), and disperse them uniformly. D:C was poured into an opaque tube container and cooled to room temperature to obtain a creamy serum.

[0042] <Evaluation method: (a) Firmness immediately after application> Twenty cosmetic experts evaluated the firmness of each cosmetic product immediately after applying it to areas with wrinkles around the eyes and mouth. They rated each product on a 5-point scale using the absolute evaluation method described below. The average score was calculated from the total scores of all panel members for each sample, and the final evaluation was based on the 4-point criteria described below.

[0043] <5-point rating scale> (Rating): (Evaluation) 5: I feel a very firming sensation. 4: Feels slightly firm. 3: Neither 2: I don't feel much firmness. 1: I don't feel any firmness at all. <5-level evaluation criteria> (Judgment): (Average score of the ratings) A (Excellent): Average score of 4.5 or higher B (Good): Average score is 3.5 or higher, but less than 4.5. C (Somewhat unacceptable): Average score is between 2.0 and 3.5 points. D (Fail): Average score is less than 2.0 points

[0044] <Evaluation method: (b) Duration of firmness> Twenty cosmetic experts evaluated the duration of firmness after applying each cosmetic product to areas with wrinkles around the eyes and mouth, one hour later. They rated each product on a 5-point scale using the absolute evaluation method described below. The average score was calculated from the total scores of all panel members for each sample, and the final evaluation was made according to the 4-point judgment criteria described below.

[0045] <5-point rating scale> (Rating): (Evaluation) 5: I feel a very firming sensation. 4: Feels slightly firm. 3: Neither 2: I don't feel much firmness. 1: I don't feel any firmness at all. <5-level evaluation criteria> (Judgment): (Average score of the ratings) A (Excellent): Average score of 4.5 or higher B (Good): Average score is 3.5 or higher, but less than 4.5. C (Somewhat unacceptable): Average score is between 2.0 and 3.5 points. D (Fail): Average score is less than 2.0 points

[0046] <Evaluation method: (c) Non-stickiness> Twenty cosmetic experts evaluated the non-stickiness of each cosmetic product when applied to areas with wrinkles around the eyes and mouth. Each product was rated on a 6-point scale using the absolute evaluation method described below. The average score was calculated from the sum of the scores from all panel members for each sample, and the final evaluation was made according to the 4-point criteria described below.

[0047] <5-point rating scale> (Rating): (Evaluation) 5: Does not feel sticky. 4: I hardly feel any stickiness. 3: Feels slightly sticky 2: Feels slightly sticky 1: It feels somewhat sticky. 0: Feels very sticky <5-level evaluation criteria> (Judgment): (Average score of the ratings) A (Excellent): Average score of 4.5 or higher B (Good): Average score is 3.5 or higher, but less than 4.5. C (Somewhat unacceptable): Average score is between 2.0 and 3.5 points. D (Fail): Average score is less than 2.0 points

[0048] <Evaluation method: (ii) Stability over time> Cosmetic products filled in opaque tube containers were stored upright in a 50°C constant temperature bath for one month. After removing them from the bath and allowing them to return to room temperature by leaving them at 25°C for 3 hours, 2 cm of the cosmetic product was dispensed, and its condition was observed. Each product was evaluated on a 3-point scale as follows.

[0049] <Judgment criteria> (Judgment) :(Judgment) A (Good): No drainage observed. B (Acceptable): Some of the drainage fluid shows a clear phase. C (Not acceptable): The clear phase of the drainage fluid is visible throughout.

[0050] As is clear from the results in Tables 1 and 2, the cream-type beauty serums of Examples 1 to 15 of the present invention were superior to the cream-type beauty serums of Comparative Examples 1 to 6 in terms of (a) firmness immediately after application, (b) duration of firmness, (c) lack of stickiness, and (d) stability over time. On the other hand, in Comparative Example 1, which did not contain component (A), and in Comparative Example 5, which used an ester oil with a melting point of less than 30°C instead of component (C), although (c) non-stickiness and (d) long-term stability were excellent, (a) firmness immediately after application and (b) the duration of firmness were lacking, and satisfactory results were not obtained. Furthermore, in Comparative Example 2, which used silica instead of component (B), Comparative Example 3, which used hydrogenated castor oil hydroxystearate with a melting point of 53°C instead of component (C), and Comparative Example 4, which used a nonpolar wax instead of component (C), although (d) stability over time was excellent, (a) firmness immediately after application, (b) duration of firmness, and (c) lack of stickiness, and satisfactory results were not obtained. Furthermore, in Comparative Example 6, which did not contain ingredient (D), although it was excellent in (a) firmness immediately after application, (b) duration of firmness, and (c) lack of stickiness, (d) poor stability over time, and a satisfactory result could not be obtained.

[0051] Example 16: Emulsion serum (oil-in-water emulsion type) (Component) (mass%) 1. Stearoyl glutamate 0.3 2,1,3-Butylene glycol 10.0 3. Cetostearyl alcohol 0.2 4. Behenyl alcohol 0.5 5. Polysorbate 80 0.3 6. Dimethicone*13 3.0 7. Phytosteryl oleate*5 5.0 8. Candelilla Raw *14 1.0 9. Isononyl isononanoate 3.0 10. Mineral oil*15 1.0 11. Ethyl oleate 4.0 12. Dimethylsilylated silica*2 0.6 13. Hydrogenated lecithin*16 0.1 14. Glycerin 5.0 15. Polyglycerin-3 2.0 16. PPG-14 Polyglyceryl-2 Ether 1.0 17. Purified water remaining amount 18. Carboxyvinyl polymer 0.2 19. Polyvinyl alcohol*1 0.6 20. Sodium hydroxide 0.07 21. Hydroxypropyl methylcellulose 0.02 22. Phenoxyethanol 0.3 23. Ethanol 1.0 24.Fragrance composition 0.3 *13: KF-96-100CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *14: Refined candelilla wax SR-3 (melting point approximately 72°C, manufactured by Nippon Natural Products Co., Ltd.) *15: CARNATION (manufactured by SONNEBORN, LLC) *16: Nikko Resinol S-10 (manufactured by Nikko Chemicals Co., Ltd.)

[0052] (Manufacturing method) A: Heat components (1) to (13) to 70°C and dissolve them uniformly. B: Add components (14) to (17) to A and disperse uniformly at 70°C. Cool C:B to 40°C, add components (18) to (24), and disperse uniformly. D:C was poured into a bottle container and cooled to room temperature to obtain a milky serum.

[0053] The emulsion-type beauty serum of Example 16 exhibited excellent (a) firmness immediately after application, (b) duration of firmness, (c) non-stickiness, and (d) stability over time. All specific evaluation results were A.

[0054] Example 17: Cream (oil-in-water emulsion type) (Component) (mass%) 1. PEG-40 stearate 1.5 2.1.3-Butylene glycol 10.0 3. Cetostearyl alcohol 1.5 4. Behenyl alcohol 1.0 5. Glycerin fatty acid ester*17 0.3 6. Squalane*18 4.0 7. Tetra(hydroxystearic acid / isostearate)dipentaerythrityl*19 5.0 8. Hydrogenated coconut oil*20 1.0 9. Hexa(hydroxystearic acid / stearic acid / Dipentaerythrityl rosinate*21 3.0 10. Cetyl tri-2-ethylhexanoate 2.0 11. Methylpolysiloxane*22 3.0 12. Dimethylsilylated silica*2 0.6 13.Synthetic phlogopite*23 1.0 14. Glycerin 5.0 15. Propanediol 2.0 16. Niacinamide 1.0 17. Purified water remaining amount 18. Carboxyvinyl polymer 0.2 19. Polyvinyl alcohol*1 0.6 20. Sodium hydroxide 0.07 21. Xanthan gum 0.02 22. Phenoxyethanol 0.3 23. Ethanol 1.0 24.Fragrance composition 0.3 *17: Sunfact GMR-90 (manufactured by Taiyo Kagaku Co., Ltd.) *18: SQUALANE (manufactured by Kishimoto Special Cod Liver Oil Industry Co., Ltd.) *19: Cosmoll 168EV (melting point approximately 50℃, manufactured by Nisshin Oillio Group) *20: Super Nucore H (melting point approximately 38°C, manufactured by NOF Corporation) *21: Cosmoll 168ARV (melting point approximately 37°C, manufactured by Nisshin Oillio Group) *22: KF-96A-20CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *23: NK-10G (manufactured by Nippon Koken Kogyo Co., Ltd.)

[0055] (Manufacturing method) A: Heat components (1) to (12) to 70°C and dissolve them uniformly. B: Add components (13) to (17) to A and disperse uniformly at 70°C. Cool C:B to 40°C, add components (18) to (24), and disperse uniformly. D:C was poured into a bottle container and cooled to room temperature to obtain the cream.

[0056] The cream in Example 17 exhibited excellent (a) firmness immediately after application, (b) duration of firmness, (c) non-stickiness, and (d) stability over time. All specific evaluation results were rated A.

[0057] Example 18: Creamy beauty serum (oil-in-water emulsion type) (Component) (mass%) 1. PEG-55 stearate 1.5 2,1,3-Butylene glycol 10.0 3. Cetostearyl alcohol 2.0 4. Sorbitan monopalmitate 1.0 5. Hydrogenated lecithin*16 0.5 6. Squalane*18 3.0 7. Hexa(hydroxystearic acid / stearic acid / Dipentaerythrityl rosinate*21 5.0 8. Dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl) / Behenir)*24 1.0 9. Macadamia nut oil fatty acid phytosteryl*6 3.0 10. Cetyl tri-2-ethylhexanoate 2.0 11. Methylpolysiloxane*25 1.0 12. Dimethylsilylated silica*2 0.6 13.Synthetic phlogopite*23 1.0 14. Glycerin 5.0 15. Propanediol 2.0 16. Niacinamide 1.0 17. Purified water remaining amount 18. Carboxyvinyl polymer 0.2 19. Polyvinyl alcohol*1 0.6 20. Sodium hydroxide 0.07 21. Tremella fuciformis polysaccharide 0.02 22. Phenoxyethanol 0.3 23. Ethanol 1.0 24.Fragrance composition 0.3 *24: PLANDOOL-S (melting point approximately 40°C, manufactured by Nippon Seika Co., Ltd.) *25: KF-96-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0058] (Manufacturing method) A: Heat components (1) to (12) to 70°C and dissolve them uniformly. B: Add components (13) to (17) to A and disperse uniformly at 70°C. Cool C:B to 40°C, add components (18) to (24), and disperse uniformly. D:C was poured into a bottle container and cooled to room temperature to obtain a creamy serum.

[0059] The cream-type serum of Example 18 exhibited excellent (a) firmness immediately after application, (b) duration of firmness, (c) non-stickiness, and (d) stability over time. All specific evaluation results were rated A.

[0060] Example 19: Eye cream (oil-in-water emulsion type) (Component) (mass%) 1. Hydrogenated lecithin*16 2.0 2,1,3-Butylene glycol 10.0 3. Cetostearyl alcohol 5.0 4. Plant-derived squalane*26 4.5 5. Polysorbate 80 0.8 6. Heavy liquid isoparaffin*4 7.0 7. Lauroyl glutamate di(octyldodecyl / phytosteryl / Behenir) 5.0 8. Candelilla Raw *12 1.0 9. Isopropyl myristate 1.0 10. Ceramide NG 0.02 11. Isostearic acid 4.0 12. Dimethylsilylated silica*2 0.7 13. Sodium hyaluronate 0.1 14. Glycerin 5.0 15. Polyglycerin-3 2.0 16. PPG-14 Polyglyceryl-2 Ether 1.0 17. Purified water remaining amount 18. Carboxyvinyl polymer 0.2 19. Polyvinyl alcohol*1 0.6 20. Sodium hydroxide 0.1 21. Hydroxypropyl methylcellulose 0.02 22. Phenoxyethanol 0.3 23. Ethanol 1.0 24.Fragrance composition 0.3 *26 Olive Squalane (manufactured by Kogyo Kogyo Co., Ltd.)

[0061] (Manufacturing method) A: Heat components (1) to (12) to 70°C and dissolve them uniformly. B: Add components (13) to (17) to A and disperse uniformly at 70°C. Cool C:B to 40°C, add components (18) to (24), and disperse uniformly. D:C was poured into a bottle container and cooled to room temperature to obtain a milky serum.

[0062] The eye cream of Example 19 exhibited excellent (a) firmness immediately after application, (b) duration of firmness, (c) non-stickiness, and (d) stability over time. All specific evaluation results were A.

[0063] The fragrance compositions used in Examples 16 to 19 of the present invention are shown in Table 3 below. [Table 3]

Claims

1. The following components (A) to (D): (A) Polyvinyl alcohol (B) Dimethylsilylated silica (C) At least one of (c1) to (c3); (c1) Kinematic viscosity at 98.9°C is 3,000 mm ２ hydrocarbon oils with a speed of / s or higher (c2) Ester oil with a melting point of 30°C to 50°C (c3) Polar wax with a melting point of 55°C or higher (D) Non-polar oil that is liquid at 25°C (excluding component (c1)) An oil-in-water emulsion composition containing the following:

2. The oil-in-water emulsion composition according to claim 1, wherein the mass ratio of component (D) to the total mass of component (C) and component (D) (D) / {(C) + (D)} is 0.1 to 0.

6.

3. The oil-in-water emulsion composition according to claim 1 or 2, wherein the component (D) is a non-volatile oil.

4. The oil-in-water emulsion composition according to claim 1 or 2, wherein the component (c2) is at least one of fatty acid sterol esters and fatty acid triglycerides.

5. The oil-in-water emulsion composition according to claim 1 or 2, wherein the oil-in-water emulsion composition is a cosmetic.

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