Emulsion composition

Abstract

This emulsion composition is a rinse-off-type water-in-oil emulsion composition. The emulsion composition contains the following components (A) to (D). (A) 0.5-10 mass% of a powder having a particle diameter of 0.5-35 μm, (B) 0.3-4 mass% of a surfactant having an HLB value of 1-8, (C) 10-80 mass% of an oil that is liquid at 25°C, and (D) 5-78 mass% of water.

Description

emulsifying composition

[0001] The present invention relates to a water-in-oil emulsion composition.

[0002] In recent years, extreme heat has become more frequent due to the effects of global warming, and the discomfort caused by excessive sweating when going outside during such heatwaves has become a serious problem for many people. In response to this, the cosmetics disclosed in Patent Documents 1 and 2 contain porous silica, which acts to quickly evaporate sweat on the skin, in order to alleviate such discomfort.

[0003] JP 2022-125619 A JP 2022-151056 A

[0004] In one embodiment of the method for using the water-in-oil emulsion composition of the present invention, an emulsion composition containing the following components (A) to (D) is applied to bare skin and then rinsed off without wiping: (A) 0.5 to 10% by mass of a powder having a particle size of 0.5 μm to 35 μm (B) 0.3 to 4% by mass of a surfactant with an HLB value of 1 to 8 (C) 10 to 80% by mass of an oil that is liquid at 25° C. (D) 5 to 78% by mass of water

[0005] A water-in-oil emulsion composition according to one embodiment of the present invention contains the following components (A) to (D), and is used for applications in which the composition is applied to bare skin and then washed off without wiping: (A) 0.5% by mass to 10% by mass of a powder having a particle size of 0.5 μm to 35 μm (B) 0.3% by mass to 4% by mass of a surfactant having an HLB value of 1 to 8 (C) 10% by mass to 80% by mass of an oil that is liquid at 25° C. (D) 5% by mass to 78% by mass of water

[0006] The emulsion composition according to one embodiment of the present invention is a rinse-off type, water-in-oil emulsion composition. The emulsion composition contains the following components (A) to (D): (A) a powder having a particle size of 0.5 μm to 35 μm, 0.5% by mass to 10% by mass; (B) a surfactant having an HLB value of 1 to 8, 0.3% by mass to 4% by mass; (C) an oil that is liquid at 25° C., 10% by mass to 80% by mass; and (D) water, 5% by mass to 78% by mass.

[0007] 1 is a diagram schematically illustrating the configuration of an emulsion composition according to one embodiment of the present invention. FIG. 2 is a diagram schematically illustrating the state in which the emulsion composition is applied to skin. Detailed Description of the Invention

[0008] In the cosmetics disclosed in Patent Documents 1 and 2, it is conceivable to increase the content of porous silica in order to further enhance the effect of suppressing discomfort caused by sweating. However, in cosmetics, there is a limit to the amount of porous silica that can be adhered to the skin, and if too much porous silica is adhered to the skin, problems such as poor compatibility with the skin and unnatural whitening can easily occur.

[0009] The present invention relates to a rinse-off emulsion composition that enhances the smooth feeling on the skin after rinsing.

[0010] The following describes embodiments of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made without departing from the spirit and scope of the present invention.

[0011] [Overall Structure of Emulsion Composition] - General Structure Emulsion composition X according to this embodiment is configured as a water-in-oil (W / O) emulsion. Emulsion composition X is typically configured as a rinse-off cosmetic that is applied to bare skin without makeup and then rinsed off without wiping. Rinse-off emulsion composition X can be applied to the entire body, including the upper part of the body (e.g., shoulders), and then rinsed off with a shower or the like, i.e., rinsed off, so that it can be spread evenly over the upper and lower body, and the components contained in emulsion composition X can remain on the bare skin even after dabbing with a towel or the like. In the following description, "after rinsing off" refers to the point in time after dabbing the skin with a towel or the like from which emulsion composition X has been rinsed off.

[0012] Emulsion composition X contains component (A), component (B), component (C), and component (D). Component (A) is composed of a powder having a particle size of 0.5 μm or more and 35 μm or less. Component (B) is composed of a surfactant with an HLB value of 1 or more and 8 or less. Component (C) is composed of an oil that is liquid at 25°C. Component (D) is composed of water. FIG. 1 schematically shows the state of each component of emulsion composition X after shaking and stirring before use. The oil phase, which is the external phase, is composed of component (C), the aqueous phase, which is the internal phase, is composed of component (D), and component (B), which functions as a water-in-oil emulsifier, is present at the interface between components (C) and (D). The powder that constitutes component (A) is coated with component (B), which has an HLB value of 1 or more and 8 or less, and the surface is hydrophobized, and the powder is dispersed in the oil phase. The HLB value is an index that represents the balance between hydrophilicity and lipophilicity, and in the present invention refers to the value calculated by the following Griffin formula: HLB value = 20 × sum of molecular weights of hydrophilic groups / molecular weight

[0013] In contrast, emulsion composition X contains, as component (A), a powder having a particle diameter of 0.5 μm or more and 35 μm or less. By making the particle diameter of the powder constituting component (A) 0.5 μm or more and 35 μm or less, a smooth feeling of the skin can be obtained even after rinsing off and after subsequent sweating. Furthermore, emulsion composition X contains a larger amount of component (C), which is composed of an oil that is liquid at 25°C, than in a general composition, so that more component (A) can be retained on the skin. In this way, emulsion composition X more reliably obtains the effect of component (A).

[0014] Furthermore, when emulsion composition X is rinsed off, the powder constituting component (A) is coated on the skin with a hydrophobic, water-repellent film, as shown in Figure 2. The water-repellent film is composed of component (B) and at least a portion of component (C). As described above, emulsion composition X can retain a larger amount of component (A) on the skin, allowing component (A) with an appropriate particle size to form an uneven shape on the skin. Furthermore, when emulsion composition X is rinsed off, hydrophilic components such as surfactants, polyols, and polar oils are washed away, so the water-repellent effect of the water-repellent film can be more effectively achieved.

[0015] As shown in Figure 2, emulsion composition X can effectively reduce sweat wettability due to the synergistic effect of the water-repellent coating and the lotus effect of the uneven surface formed by the powder constituting component (A). Therefore, emulsion composition X can suppress the discomfort caused by sweat spreading over the skin.

[0016] As described above, emulsion composition X is configured so that the components contained in emulsion composition X remain on the skin after rinsing, and the effects of each component remaining on the skin last for a long period of time. For this reason, emulsion composition X is unsuitable for use as a cleansing composition, such as a skin cleansing composition intended to remove cosmetics such as makeup and dirt from the skin, or a hair cleansing composition intended to remove dirt from the hair and scalp.

[0017] Component (A) Component (A) of emulsion composition X is composed of a powder having a particle size of 0.5 μm or more and 35 μm or less. The powder constituting component (A) is preferably white in order to give the skin a bright and translucent appearance after rinsing off emulsion composition X. In emulsion composition X, a high content of component (A) is advantageous in order to more effectively obtain a smooth skin feel, while a not too high content of component (A) is advantageous in order to ensure compatibility with the skin and prevent the skin from appearing unnaturally white. From these viewpoints, the content of component (A) in emulsion composition X is 0.5% by mass or more and 10% by mass or less, preferably 1% by mass or more and 8% by mass or less, and more preferably 2% by mass or more and 7% by mass or less.

[0018] The powder constituting component (A) is preferably one or more selected from component (A1) composed of porous silica particles, component (A2) composed of cellulose particles, component (A3) composed of talc particles, and component (A4) composed of non-porous silica particles. Furthermore, from the viewpoint of achieving a smooth feel on the skin, the powder constituting component (A) is preferably composed of spherical particles. In this embodiment, "spherical" refers to a shape that can be visually recognized as a sphere with a low aspect ratio overall. It does not have to be a perfect sphere, and may be, for example, an approximately spherical shape, a spheroidal shape, or a sphere with an uneven surface. Of the above-mentioned preferred components (A), components (A1), (A2), and (A4) are composed of spherical particles, and component (A3) is composed of plate-like particles.

[0019] Furthermore, the powder constituting component (A) is more preferably component (A1) composed of porous silica particles. The porous silica particles constituting component (A1) adsorb unpleasant components contained in sweat, such as salt and lactic acid, and purify sweat, thereby reducing the viscosity of sweat and effectively allowing the moisture constituting sweat to evaporate quickly. Furthermore, in emulsion composition X, component (A1) also adsorbs sebum, thereby suppressing the effects of sebum. In order to adsorb more salt, lactic acid, sebum, and the like, emulsion composition X more preferably contains component (A1) as component (A) with an oil absorption capacity of 250 mL / 100 g or more. The oil absorption capacity can be measured in accordance with JIS K 5101-13-2. Furthermore, in emulsion composition X, the synergistic effect of the water-repellent effect and the lotus effect described above prevents sweat from remaining on the skin after rinsing, thereby reducing the amount of sweat that needs to be purified by the action of component (A1). Therefore, in emulsion composition X, the effect of component (A1) can be maintained for a longer period of time without increasing the amount of component (A1). The average particle size of component (A1) is preferably 3.0 μm or more and 11 μm or less.

[0020] The particle size of the powder constituting component (A) is advantageously small in order to obtain a smooth feel on the skin after emulsion composition X has been rinsed off, and is advantageously not too small in order to prevent the powder from feeling rough to the touch. From these viewpoints, the average particle size of the powder constituting component (A) is preferably 0.5 μm or more and 35 μm or less, more preferably 1.0 μm or more and 30 μm or less, even more preferably 1.0 μm or more and 15 μm or less, still more preferably 3.0 μm or more and 15 μm or less, and even more preferably 3.0 μm or more and 12 μm or less. In this embodiment, the particle size refers to the particle size measured using a Coulter Counter Multisizer (manufactured by Beckman Coulter, Inc.) according to a method conforming to JIS Z 8832:2010, and the average particle size refers to the volume-based median diameter (D50) obtained by measurement.

[0021] Component (B) Component (B) of emulsion composition X is composed of a surfactant with an HLB value of 1 to 8. In emulsion composition X, the surfactant with an HLB value of 1 to 8 functions as a water-in-oil emulsifier and, as shown in FIG. 1 , is thought to coat the powder constituting component (A), thereby imparting hydrophobicity to the surface of the powder. This allows emulsion composition X to disperse the powder constituting component (A) in the oil phase. To effectively achieve this effect, the HLB value of component (B) is 1 to 8, preferably 2 to 7, more preferably 3 to 6, and even more preferably 4 to 6. It is also preferable that the HLB value of component (B) is 3 to 5. Furthermore, to effectively achieve the above effect, the content of component (B) in emulsion composition X is preferably 0.3% by mass or more, more preferably 0.4% by mass or more, even more preferably 0.5% by mass or more, and even more preferably 1% by mass or more. Furthermore, if a large amount of component (B) remains on the skin after rinsing, emulsion composition X tends to leave a sticky feeling. From this perspective, the content of component (B) in emulsion composition X is preferably 4% by mass or less, more preferably 3% by mass or less, and even more preferably 2% by mass or less. Furthermore, the content of component (B) in emulsion composition X is preferably 0.3% by mass or more and 4% by mass or less, more preferably 0.5% by mass or more and 3% by mass or less, and even more preferably 1% by mass or more and 2% by mass or less.

[0022] Component (C) Component (C) of emulsion composition X is composed of an oil that is liquid at 25°C. In this embodiment, "liquid" refers to being liquid at 25°C, for example, having a viscosity of 20,000 mPa·s or less at 25°C. The oil that constitutes component (C) retains component (A) on the skin by leaving component (A) dispersed on the skin after rinsing. In emulsion composition X, by incorporating a larger amount of component (C) than in a typical composition, more component (A) can be retained on the skin. On the other hand, in order to avoid making the skin oily and sticky, it is advantageous for emulsion composition X not to contain too much component (C). From these perspectives, the content of component (C) in emulsion composition X is 10% by mass or more and 80% by mass or less, preferably 15% by mass or more and 60% by mass or less, more preferably 15% by mass or more and 50% by mass or less, and even more preferably 20% by mass or more and 40% by mass or less.

[0023] In emulsion composition X, in order to retain as much component (A) as possible on the skin, component (C) preferably contains component (C1), which is composed of a non-volatile oil that remains on the skin without volatilizing even after rinsing. In this embodiment, "non-volatile" refers to the property that, when 1 g of oil is spread on a 48 mm diameter glass petri dish and left at 25°C and normal pressure for 24 hours, the weight loss rate is 3% or less. In emulsion composition X, in order to form a water-repellent coating that provides a high water-repellent effect, the mass ratio (C1) / (C), which is the ratio of the mass of component (C1) to the mass of component (C), is preferably 0.3 or more and 1 or less, more preferably 0.5 or more and 1 or less, and even more preferably 0.8 or more and 1 or less.

[0024] Furthermore, in emulsion composition X, it is preferable that component (C) contains a hydrophobic, non-polar oil that is likely to remain on the skin during rinsing. Therefore, in emulsion composition X, it is more preferable that component (C) contains component (C2) composed of a non-polar, non-volatile oil. The hydrophobic component (C2) constituting component (C) functions as part of the water-repellent film shown in FIG. 2 . In emulsion composition X, in order to form a water-repellent film that provides a high water-repellent effect, the mass ratio (C2) / (C), which is the ratio of the mass of component (C2) to the mass of component (C), is preferably 0.3 or more and 1 or less, more preferably 0.5 or more and 1 or less, and even more preferably 0.8 or more and 1 or less. In emulsion composition X, by setting the mass ratio (C2) / (C) to 0.3 or more, the effect of component (C2) improves powder residue, resulting in a smooth feeling after rinsing, and this smooth feeling is likely to persist even after sweating. In emulsion composition X, component (C) preferably contains component (C2), but component (C) may be composed of at least one of a volatile oil and a polar non-volatile oil.

[0025] In emulsion composition X, it is preferable to blend components (A) and (C) in a balanced manner so that a predetermined amount of component (A) remains on the skin. Specifically, in emulsion composition X, the mass ratio (C) / (A), which is the ratio of the mass of component (C) to the mass of component (A), is preferably 1 or more and 60 or less, more preferably 5 or more and 30 or less, and even more preferably 7 or more and 14 or less. From the same viewpoint, in emulsion composition X, the mass ratio (C1) / (A), which is the ratio of the mass of component (C1) to the mass of component (A), is preferably 1 or more and 60 or less, more preferably 5 or more and 30 or less, and even more preferably 7 or more and 14 or less. From the same viewpoint, in emulsion composition X, the mass ratio (C2) / (A), which is the ratio of the mass of component (C2) to the mass of component (A), is preferably 1 or more and 60 or less, more preferably 5 or more and 30 or less, and even more preferably 7 or more and 14 or less. In emulsion composition X, by setting the mass ratio (C2) / (A) to 1 or more, the improved powder residue due to the action of component (C2) provides a smooth feeling after rinsing, and this smooth feeling tends to persist even after sweating. Furthermore, in emulsion composition X, it is preferable to blend components (A1) and (C1) in a balanced manner in order to form a good water-repellent film. Specifically, in emulsion composition X, the mass ratio (C1) / (A1), which is the ratio of the mass of component (C1) to the mass of component (A1), is preferably 1 or more and 60 or less, more preferably 5 or more and 30 or less, even more preferably 7 or more and 14 or less, and still more preferably 10.5 or more and 14 or less. Furthermore, in emulsion composition X, it is even more preferable to blend components (A1) and (C2) in a balanced manner in order to form a good water-repellent film. Specifically, in emulsion composition X, the mass ratio (C2) / (A1), which is the ratio of the mass of component (C2) to the mass of component (A1), is preferably 1 or more and 60 or less, more preferably 5 or more and 30 or less, even more preferably 7 or more and 14 or less, and still more preferably 10.5 or more and 14 or less.

[0026] Component (D) Component (D) of emulsion composition X is composed of water. For emulsion composition X, purified water, ion-exchanged water, distilled water, etc. can be used as component (D). For emulsion composition X, the remainder excluding components other than component (D) can be composed of component (D). For emulsion composition X, a high content of component (D) is advantageous for providing a fresh feeling upon application, while a moderate content of component (D) is advantageous for emulsion stability. From these perspectives, the content of component (D) in emulsion composition X is 5% by mass or more and 78% by mass or less, preferably 14% by mass or more and 48% by mass or less, more preferably 15% by mass or more and 42% by mass or less, and even more preferably 20% by mass or more and 35% by mass or less. It is also preferable that the content of component (D) is 28% by mass or more and 36% by mass or less.

[0027] [Detailed Composition of Emulsion Composition X] Component (A) Examples of the component (A1) composed of porous silica particles include Sunsphere (registered trademark) H-31 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 150 mL / 100 g), Sunsphere (registered trademark) H-32 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 300 mL / 100 g), H-33 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 400 mL / 100 g), Sunsphere (registered trademark) L-51 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 5 μm, oil absorption: 150 mL / 100 g), and Sunsphere (registered trademark) L-51 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 5 μm, oil absorption: 150 mL / 100 g). 0g), Sunsphere (registered trademark) H-51 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 5 μm, oil absorption: 150 mL / 100 g), Sunsphere (registered trademark) H-52 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 5 μm, oil absorption: 300 mL / 100 g), Sunsphere (registered trademark) H-121 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 12 μm, oil absorption: 150 mL / 100 g), Sunsphere (registered trademark) H-122 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 12 μm, oil absorption: 300 mL / 100 g), SILICA MICROBEAD P-500 (manufactured by JGC Catalysts & Chemicals Co., Ltd., average particle size: about 2 μm, oil absorption: about 60 mL / 100 g), SILICA MICROBEAD L-1500 (manufactured by JGC Catalysts & Chemicals Co., Ltd., average particle size: about 11 μm, oil absorption: about 150 mL / 100 g), SILICA MICROBEAD P-4000 (manufactured by JGC Catalysts & Chemicals Co., Ltd., average particle size: about 30 μm, oil absorption: about 60 mL / 100 g), SYLYSIA 660 (manufactured by Fuji Silysia Chemical Co., Ltd., average particle size: 5.5 μm, oil absorption: about 230 mL / 100 g), SYLYSIA 882 (manufactured by Fuji Silysia Chemical Ltd., average particle size: 10 μm, oil absorption: about 90 mL / 100 g), God Ball E-6C (manufactured by Suzuki Yushi Kogyo Co., Ltd., average particle size: about 3 μm, oil absorption: about 120 mL / 100 g), God Ball E-90C (manufactured by Suzuki Yushi Kogyo Co., Ltd., average particle size: about 30 μm, oil absorption: about 120 mL / 100 g), God Ball AF-6C (manufactured by Suzuki Yushi Kogyo Co., Ltd., average particle size: about 3 μm, oil absorption: about 300 mL / 100 g), and the like can be used.

[0028] Examples of (A2) composed of cellulose particles that can be used include CELLULOBEADS D-5 (manufactured by Daito Chemical Industry Co., Ltd., average particle size: 5 μm), CELLULOBEADS D-10 (manufactured by Daito Chemical Industry Co., Ltd., average particle size: 10 μm), CELLULOBEADS D-30 (manufactured by Daito Chemical Industry Co., Ltd., average particle size: 30 μm), CELLULOBEADS C-25 (manufactured by JNC Corporation, 8 to 10 μm), and CELLULOBEADS TA-25 (manufactured by JNC Corporation, average particle size: 6 to 8 μm). Examples of the component (A3) composed of talc particles that can be used include Talc JA-13R (manufactured by Asada Flour Milling Co., Ltd., average particle size: 5 to 8 μm), Talc JA-46R (manufactured by Asada Flour Milling Co., Ltd., average particle size: 7 to 11 μm), Talc JA-68R (manufactured by Asada Flour Milling Co., Ltd., average particle size: 9 to 12 μm), Talc CT-30 (manufactured by Yamaguchi Mica Co., Ltd., 10 μm), Talc CT-35 (manufactured by Yamaguchi Mica Co., Ltd., 17 μm), Talc CT-250 (manufactured by Yamaguchi Mica Co., Ltd., 30 μm), and Talc EX-15 (manufactured by Yamaguchi Mica Co., Ltd., 15 μm).

[0029] Component (B) The surfactant constituting component (B) typically preferably comprises at least one or more selected from silicone surfactants such as modified silicones, polyoxyethylene hydrogenated castor oil, and sorbitan fatty acid esters. Examples of modified silicones constituting component (B) include one or more selected from polyether-modified silicones, oxazoline-modified silicones, polyglycerin-modified silicones, polyether / alkyl-co-modified silicones, and polyglycerin / alkyl-co-modified silicones. Among these, at least one selected from polyether-modified silicones and oxazoline-modified silicones is preferred. Polyether-modified silicones are polymers having a structure in which the hydrocarbon groups on the side chains and / or terminals of silicone oils are substituted with polyether groups. Oxazoline-modified silicones are polymers whose constituent units are hydrophilic segments with N-acylalkyleneimine repeating units and organopolysiloxane segments. The polyether-modified silicone used as component (B) is preferably a polyether-modified silicone having a linear main silicone chain. The HLB value of the polyether-modified silicone used as component (B) is preferably 3 or more and 4.5 or less.

[0030] Examples of polyether groups in polyether-modified silicones suitable as component (B) include polyethyleneoxy groups, polypropyleneoxy groups, and polyalkyleneoxy groups in which ethyleneoxy groups (EO) and propyleneoxy groups (trimethyleneoxy groups or propane-1,2-diyloxy groups; PO) are added in a block or random manner. Examples of polyether-modified silicones that can be used include compounds in which polyether groups are grafted onto a silicone main chain, and compounds in which silicone and polyether groups are bonded in a block manner, with compounds in which polyether groups are grafted onto a silicone main chain being preferred.

[0031] The polyether-modified silicone suitable as component (B) is preferably at least one or more selected from PEG-32 methyl ether dimethicone, PEG-11 methyl ether dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, PEG-9 dimethicone, PEG-3 dimethicone, PEG-9 methyl ether dimethicone, PEG-10 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, PEG / PPG-30 / 10 dimethicone, PEG-12 dimethicone, and bisisobutyl PEG / PPG-10 / 7 / dimethicone, and more preferably at least one or more selected from PEG-3 dimethicone and PEG-10 dimethicone.

[0032] Commercially available examples of PEG-32 methyl ether dimethicone include KF-6004 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of PEG-11 methyl ether dimethicone include KF-6011 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of PEG / PPG-20 / 22 butyl ether dimethicone include KF-6012 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of PEG-9 dimethicone include KF-6013 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of PEG-3 dimethicone include KF-6015 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of PEG-9 methyl ether dimethicone include KF-6016 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of PEG-10 dimethicone include KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd.) and KF-6043 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of PEG-9 polydimethylsiloxyethyl dimethicone include KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available examples of lauryl PEG-9 polydimethylsiloxyethyl dimethicone include KF-6038 (manufactured by Shin-Etsu Chemical Co., Ltd.).

[0033] An example of a polyether / alkyl-co-modified silicone suitable as component (B) is cetyl PEG / PPG-10 / 1 dimethicone. Commercially available examples of cetyl PEG / PPG-10 / 1 dimethicone include KF-6048 (manufactured by Shin-Etsu Chemical Co., Ltd.) and ABIL EM-90 (manufactured by Evonik Japan Co., Ltd.). An example of a polyglycerin / alkyl-co-modified silicone is bis(glyceryl / lauryl)glyceryl lauryl dimethicone. Commercially available examples of bis(glyceryl / lauryl)glyceryl lauryl dimethicone include ABIL EM-120 (manufactured by Evonik Japan Co., Ltd.).

[0034] In the oxazoline-modified silicone used as component (B), the mass ratio of the organopolysiloxane segment to the hydrophilic segment having N-acylalkyleneimine as a repeating unit (organopolysiloxane segment a / hydrophilic segment b having N-acylalkyleneimine as a repeating unit) is, from the viewpoint of improving the feel during use, for example, a / b = 45 / 55 or more, preferably 65 / 35 or more, and more preferably 85 / 15 or more, and is, for example, 99 / 1 or less, preferably 98 / 2 or less. Note that in this embodiment, this mass ratio refers to the value determined by dissolving the organopolysiloxane of the present invention in 5% by mass in deuterated chloroform and subjecting it to nuclear magnetic resonance (H-NMR) analysis, from the integral ratio of alkyl or phenyl groups in the organopolysiloxane segment to methylene groups in the poly(N-acylalkyleneimine) segment.

[0035] In the oxazoline-modified silicone, the weight average molecular weight of the organopolysiloxane segment is, for example, 1 × 10 ４ or more, preferably 2×10 ４ More preferably, 3.5×10 ４ or more, for example, 3 × 10 ５ or less, preferably 2 × 10 ５ More preferably, 1.5 × 10 ５The weight average molecular weight of the organopolysiloxane constituting the main chain is approximately the same as the average molecular weight of the modified organopolysiloxane, since the organopolysiloxane constituting the main chain has a common skeleton with the modified organopolysiloxane, which is the raw material compound. Here, the weight average molecular weight of the modified organopolysiloxane is the weight average molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC) under the following conditions: Column: Super HZ4000 + Super HZ2000 (manufactured by Tosoh Corporation) Eluent: 1 mM triethylamine / THF Flow rate: 0.35 mL / min Column temperature: 40°C Detector: UV detector Sample: 50 μL

[0036] In the oxazoline-modified silicone, the number average molecular weight of the poly(N-acylalkyleneimine) segment is, for example, 5×10 ２ or more, preferably 7×10 ２ More preferably, 8×10 ２ or more, and for example, 4 × 10 ３ or less, preferably 3.5 × 10 ３ More preferably, 3×10 ３ The number average molecular weight of the poly(N-acylalkyleneimine) segment can be measured by a method of calculation from the molecular weight and degree of polymerization of the N-acylalkyleneimine unit or by the above-mentioned GPC measurement method, but in this embodiment, it refers to the number average molecular weight measured by the GPC measurement method.

[0037] A specific example of the oxazoline-modified silicone polymer is represented by the following general formula (1).

[0038]

[0039] In the general formula (1), n ​​represents a number from 1 to 5, and R ９ represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, m is the degree of polymerization of the monomer and is a number from 1 to 1000, r is an average of 10 to 2000, p is an average of 0 to 20, q is an average of 1 to 20, and X －indicates a counter ion of the quaternary ammonium ion, and represents an ethyl sulfate ion, methyl sulfate ion, chloride ion, iodide ion, sulfate ion, p-toluenesulfonate ion, or perchlorate ion. A polymerization initiator residue is bonded to the N-terminus of the repeating unit of the N-acylalkyleneimine. Examples of polymerization initiators that can be used include diethyl sulfate, dimethyl sulfate, hydrochloric acid, hydrogen iodide, sulfuric acid, p-toluenesulfonic acid, and perchloric acid, and these residues are bonded to the N-terminus after polymerization. A preferred oxazoline-modified silicone polymer is N-propionylpolyethyleneimine-methylpolysiloxane copolymer (POLYSILICONE-9). Examples of POLYSILICONE-9 that can be used include those described in JP-A-2009-256367.

[0040] Examples of commercially available polyoxyethylene hydrogenated castor oil suitable as component (B) include EMALEX HC-5 (Nihon Emulsion Co., Ltd.) and EMALEX RWIS-315 (Nihon Emulsion Co., Ltd.).

[0041] Examples of sorbitan fatty acid esters suitable as component (B) include sorbitan monoisostearate, sorbitan monooleate, sorbitan sesquistearate, sorbitan sesquioleate, etc. Commercially available examples of sorbitan fatty acid esters include Rheodol SP-S10V (manufactured by Kao Corporation), Rheodol SP-O10V (manufactured by Kao Corporation), and Rheodol AO-15V.

[0042] Component (C) The non-polar non-volatile oil constituting component (C2) of component (C) may be, for example, at least one selected from non-volatile hydrocarbon oils and non-volatile silicone oils, with non-volatile silicone oils being preferred. The non-volatile hydrocarbon oil constituting component (C2) may be, for example, one or more selected from linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, liquid isoparaffin, squalane, and squalene, with hydrogenated polyisobutene being preferred. The non-volatile silicone oil constituting component (C2) may be, for example, one or more selected from dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, with dimethylpolysiloxane being preferred. Commercially available examples of non-polar, non-volatile oils suitable as component (C2) include dimethicone (KF-96A-10CS, KF-96A-6CS) manufactured by Shin-Etsu Chemical Co., Ltd. and light liquid isoparaffin (Pearleam (registered trademark) 4) manufactured by NOF Corporation. Examples of polar, non-volatile oils that constitute component (C2) include ester oils, ether oils, higher fatty acids, and higher alcohols. Commercially available examples of polar, non-volatile oils suitable as component (C2) include isopropyl palmitate (Exsepal IPP) manufactured by Kao Corporation.

[0043] The volatile oil constituting component (C) is volatile, meaning that it has a flash point of 35 to 87°C. Examples of the volatile oil constituting component (C) include volatile silicone oils and volatile hydrocarbon oils. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as dimethylpolysiloxane (1 cs), dimethylpolysiloxane (1.5 cs), and dimethylpolysiloxane (2 cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Of these, linear dimethylpolysiloxanes such as dimethylpolysiloxane (1 cs), dimethylpolysiloxane (1.5 cs), and dimethylpolysiloxane (2 cs) are preferred. Examples of volatile hydrocarbon oils include paraffinic hydrocarbon oils such as n-decane, n-undecane, and n-dodecane; isoparaffinic hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene; and cyclic paraffinic hydrocarbon oils such as cyclodecane and cyclododecane. Of these, hydrocarbon oils having 8 to 16 carbon atoms are preferred, hydrocarbon oils having 10 to 16 carbon atoms are more preferred, and hydrocarbon oils having 12 carbon atoms are even more preferred. Of these, isoparaffinic hydrocarbon oils are preferred, and isododecane and hydrogenated polyisobutene having 12 carbon atoms are more preferred. As the volatile oil, volatile silicone oil is preferred from the viewpoint of a smooth feeling after rinsing off.

[0044] Other Components Emulsion composition X may contain components other than those described above, as necessary. For example, emulsion composition X preferably contains component (E) composed of ethanol, as this has the advantage of being easily spreadable upon application. The inclusion of ethanol makes the emulsion droplets more likely to break down when sheared during application, making it easier to spread. In emulsion composition X, it is advantageous for the content of component (E) to be somewhat high in order to achieve an easy-to-spread feel upon application, and it is advantageous for the content of component (E) not to be too high in order to ensure high stability. From these perspectives, the content of component (E) in emulsion composition X is preferably 10% by mass or more and 50% by mass or less, more preferably 20% by mass or more and 45% by mass or less, and even more preferably 30% by mass or more and 40% by mass or less. It should be noted that emulsion composition X does not necessarily contain component (E).

[0045] Furthermore, emulsion composition X may contain component (F) composed of a polyol. However, since the powder constituting component (A) is likely to be washed away together with the polyol constituting component (F) during rinsing, it is advantageous for emulsion composition X not to contain too much component (F). For this reason, emulsion composition X preferably contains a small amount of component (F) or no component (F). Specifically, in emulsion composition X containing component (F), the content of component (F) is preferably 4% by mass or less, more preferably 3% by mass or less, and even more preferably 2% by mass or less. Examples of polyols constituting component (F) include one or more polyhydric alcohols such as glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, polyglycerin, and polyethylene glycol. Among these, 1,3-butylene glycol is preferred.

[0046] In relation to the above-described embodiment, the present invention further discloses the following configurations. <1> A method for using a water-in-oil emulsion composition, comprising applying the emulsion composition containing the following components (A) to (D) to bare skin and then rinsing it off without wiping it off: (A) 0.5 to 10 mass% of a powder having a particle size of 0.5 μm to 35 μm (B) 0.3 to 4 mass% of a surfactant having an HLB value of 1 to 8 (C) 10 to 80 mass% of an oil that is liquid at 25°C (D) 5 to 78 mass% of water <2> A water-in-oil emulsion composition, comprising the following components (A) to (D), for use in an application in which the emulsion composition is applied to bare skin and then rinsed off without wiping it off. (A) A powder having a particle size of 0.5 μm or more and 35 μm or less, 0.5% by mass or more and 10% by mass or less (B) A surfactant having an HLB value of 1 or more and 8 or less, 0.3% by mass or more and 4% by mass or less (C) An oil that is liquid at 25°C, 10% by mass or more and 80% by mass or less (D) Water, 5% by mass or more and 78% by mass or less <3> Use of a water-in-oil emulsion composition, comprising applying an emulsion composition containing the following components (A) to (D) to bare skin and then rinsing it off without wiping it off. (A) Powder having a particle size of 0.5 μm or more and 35 μm or less, 0.5% by mass or more and 10% by mass or less (B) Surfactant having an HLB value of 1 or more and 8 or less, 0.3% by mass or more and 4% by mass or less (C) Oil that is liquid at 25°C, 10% by mass or more and 80% by mass or less (D) Water, 5% by mass or more and 78% by mass or less <4> Use of a water-in-oil emulsion composition, comprising applying an emulsion composition containing the following components (A) to (D) to bare skin and then rinsing it off without wiping it off. (A) a powder having a particle size of 0.5 μm or more and 35 μm or less, 0.5% by mass or more and 10% by mass or less; (B) a surfactant having an HLB value of 1 or more and 8 or less, 0.3% by mass or more and 4% by mass or less; (C) an oil that is liquid at 25°C, 10% by mass or more and 80% by mass or less; (D) water, 5% by mass or more and 78% by mass or less. <5> A rinse-off water-in-oil emulsion composition, comprising the following components (A) to (D):(A) a powder having a particle size of 0.5 μm or more and 35 μm or less, 0.5% by mass or more and 10% by mass or less; (B) a surfactant having an HLB value of 1 or more and 8 or less, 0.3% by mass or more and 4% by mass or less; (C) an oil that is liquid at 25°C, 10% by mass or more and 80% by mass or less; (D) water, 5% by mass or more and 78% by mass or less. <6> A rinse-off water-in-oil emulsion composition, comprising the following components (A) to (D): (A) 0.5% by mass or more and 10% by mass or less of porous silica having a particle size of 3.0 μm or more and 11 μm or less; (B) 0.3% by mass or more and 4% by mass or less of polyether-modified silicone having an HLB value of 3 or more and 4.5 or less; (C) 10% by mass or more and 80% by mass or less of one or more selected from dimethicone and light liquid isoparaffin, which are non-volatile oils liquid at 25°C; and (D) 5% by mass or more and 78% by mass or less of water. <7> A rinse-off water-in-oil emulsion composition, comprising the following components (A) to (D). (A) a powder having a particle size of 0.5 μm or more and 35 μm or less, 2% by mass or more and 7% by mass or less; (B) a surfactant having an HLB value of 1 or more and 8 or less, 0.5% by mass or more and 3% by mass or less; (C) an oil that is liquid at 25°C, 20% by mass or more and 40% by mass or less; (D) water, 5% by mass or more and 78% by mass or less. <8> A rinse-off water-in-oil emulsion composition, comprising the following components (A) to (D): (A) porous silica having a particle size of 3.0 μm or more and 11 μm or less, 2% by mass or more and 7% by mass or less; (B) polyether-modified silicone having an HLB value of 3 or more and 4.5 or less, 0.5% by mass or more and 3% by mass or less; (C) one or more non-volatile oils selected from dimethicone and light liquid isoparaffin, which are liquid at 25°C, 20% by mass or more and 40% by mass or less; (D) water, 5% by mass or more and 78% by mass or less. <9> The emulsion composition according to <5>, wherein the component (A) is white. <10> The emulsion composition according to <5> or <9>, wherein the component (A) is composed of spherical particles. <11> The emulsion composition according to <10>, wherein the component (A) includes a component (A1) composed of porous silica particles. <12> The emulsion composition according to <11>, wherein the component (A1) has an oil absorption of 250 mL / 100 g or more.<13> The emulsion composition according to <11> or <12>, wherein the component (A) includes a component (A2) composed of cellulose particles. <14> The emulsion composition according to any one of <11> to <13>, wherein the component (A) includes a component (A4) composed of nonporous silica particles. <15> The emulsion composition according to <5> or <9>, wherein the component (A) includes a component (A3) composed of talc particles. <16> The emulsion composition according to any one of <5> or <9> to <15>, wherein the component (B) and at least a part of the component (C) form a water-repellent coating. <17> The emulsion composition according to any one of <5> or <9> to <16>, wherein the HLB value of the component (B) is 2 or more and 7 or less. <18> The emulsion composition according to any one of <5> or <9> to <17>, wherein the component (B) comprises one or more selected from polyether-modified silicones, oxazoline-modified silicones, polyglycerin-modified silicones, polyether-alkyl co-modified silicones, and polyglycerin-alkyl co-modified silicones. <19> The emulsion composition according to <18>, wherein the component (B) comprises a polyether-modified silicone having a linear main silicone chain. <20> The emulsion composition according to any one of <5> or <9> to <19>, wherein the mass ratio (C) / (A) of the component (C) to the component (A) is 1 or more and 60 or less. <21> The emulsion composition according to <5> or any one of <9> to <20>, wherein the component (C) comprises a component (C1) composed of a non-volatile oil. <22> The emulsion composition according to <21>, wherein the mass ratio (C1) / (C) of the component (C1) to the component (C) is 0.3 or more and 1 or less. <23> The emulsion composition according to <21> or <22>, wherein the mass ratio (C1) / (A) of the component (C1) to the component (A) is 1 or more and 60 or less. <24> The emulsion composition according to any one of <21> to <23>, wherein the component (A) includes a component (A1) composed of porous silica particles, and the mass ratio (C1) / (A) of the component (C1) to the component (A1) is 1 or more and 60 or less.<25> The emulsion composition according to any one of <5> or <9> to <24>, wherein the component (C) includes a component (C2) composed of a non-polar, non-volatile oil. <26> The emulsion composition according to <25>, wherein the component (C2) includes at least one selected from the group consisting of non-volatile hydrocarbon oils and non-volatile silicone oils. <27> The emulsion composition according to <25> or <26>, wherein the mass ratio of the component (C2) to the component (C), (C2) / (C), is 0.3 or more and 1 or less. <28> The emulsion composition according to any one of <25> to <27>, wherein the mass ratio of the component (C2) to the component (A), (C2) / (A), is 1 or more and 60 or less. <29> The emulsion composition according to any one of <25> to <28>, wherein the component (A) includes a component (A1) composed of porous silica particles, and the mass ratio of the component (C2) to the component (A1), (C2) / (A1), is from 1 to 60. <30> The emulsion composition according to any one of <5> or <9> to <29>, further containing the following component (E): (E) ethanol: 10% by mass or more and 50% by mass or less.

[0047] [Examples and Comparative Examples] - General Description Examples of the present invention will be described, but the present invention should not be construed as being limited by these examples. In Examples 1 to 24 of the present invention and Comparative Examples 1 to 5, samples of emulsion compositions with different configurations were prepared, and evaluations were performed for each configuration. In each table shown below, the numerical values ​​listed for the components of the emulsion composition indicate the content (% by mass) in the emulsion composition. First, the evaluation method common to Examples 1 to 24 and Comparative Examples 1 to 5 will be described.

[0048] Smooth Feeling (After Rinse-Off) For the evaluation of smooth feeling (after rinse-off), a sample of the emulsion composition was applied at 1 mg / cm to an artificial leather (5 x 5 cm, Laforet black leather for experiments, manufactured by Okamoto Chemical Products Co., Ltd.). ２The solution was dropped onto the surface of the artificial leather so that the surface was covered with water and applied with a finger. The artificial leather was then rinsed with tap water for 5 seconds, and gently pressed with a cloth (towel) to remove the water droplets on the surface, forming a coating film. The resulting coating film was then subjected to a sensory evaluation to assess its smooth feel when touched. The smooth feel (after rinsing off) was evaluated using a 5-point scale: "1: not smooth," "2: not very smooth," "3: slightly smooth," "4: smooth," and "5: very smooth."

[0049] Measurement of powder residual rate and determination of powder residual score In the evaluation of powder residual rate, a sample of the emulsion composition was applied at 2 mg / cm to an artificial leather (12 x 7 cm, Laforet black leather for experiments, manufactured by Okamoto Chemical Products Co., Ltd.). ２ The emulsion composition was dropped onto the artificial leather so that the surface was covered with water and applied with a finger. The artificial leather was then rinsed with tap water for 5 seconds and allowed to stand at room temperature for 1 hour to dry. The powder residual rate is defined as the mass ratio of the powder remaining on the artificial leather after drying to the powder contained in the emulsion composition sample. Specifically, the powder residual rate was calculated using the following formula: Powder residual rate (mass %) = 100 × [(a-b) - c × d × e] / (c × f) a: Mass (mg) of artificial leather after drying b: Mass (mg) of artificial leather before application c: Mass (mg) of applied emulsion composition sample d: Non-volatile component content (mass %) in emulsion composition sample e: Non-volatile component residual rate (mass %) in emulsion composition sample after running under water f: Powder content (mass %) in emulsion composition sample Note that for the non-volatile component residual rate in emulsion composition sample e after running under water, an experimentally determined average value was used, and specifically, it was 20 mass % for the water-in-oil samples according to Examples 1 to 24 and Comparative Examples 2 to 5, and 5 mass % for the oil-in-water sample according to Comparative Example 1. The powder residual rate was evaluated using a powder residual score on a five-point scale: "1: 0% by mass or more and less than 10% by mass," "2: 10% by mass or more and less than 30% by mass," "3: 30% by mass or more and less than 40% by mass," "4: 40% by mass or more and less than 50% by mass," and "5: 50% by mass or more."

[0050] Dry feeling (after sweating) For evaluation of dry feeling (after sweating), a sample of the emulsion composition was applied at 1 mg / cm to an artificial leather (5 x 5 cm, Laforet black leather for experiments, manufactured by Okamoto Chemical Products Co., Ltd.). ２ The artificial leather was then exposed to running tap water for 5 seconds, and lightly pressed with a cloth (towel) to remove the water droplets on the surface, forming a coating film. Water was sprayed onto the coating film in the form of a mist (approximately 10 mg / cm) to simulate sweat. ２ Then, a sensory evaluation was conducted on the smooth feel of the coating film when touched. The smooth feel (after sweating) was evaluated using a 5-point scale: "1: Not smooth," "2: Not very smooth," "3: Slightly smooth," "4: Smooth," and "5: Very smooth."

[0051] Absence of unnatural whiteness (after rinsing off) For the evaluation of absence of unnatural whiteness, a sample of the emulsion composition was applied at 1 mg / cm to artificial leather (5 x 5 cm, Laforet black leather for experiments, manufactured by Okamoto Chemical Products Co., Ltd.). ２ The artificial leather was then sprayed with tap water for 5 seconds, and gently pressed with a cloth (towel) to remove water droplets from the surface, forming a coating film. The resulting coating film was then subjected to a sensory evaluation for its appearance (unnatural whiteness). The lack of unnatural whiteness was evaluated using a 5-point scale: "1: unnatural whiteness present," "2: slightly unnatural whiteness present," "3: not much unnatural whiteness present," "4: no unnatural whiteness present," and "5: no unnatural whiteness present at all."

[0052] Examples 1 to 6 In each of Examples 1 to 6, emulsion composition samples composed of the components shown in Table 1 were prepared. In Examples 1 to 6, the type of component (A) in the emulsion composition samples was varied. In Examples 1, 2, and 6, component (A1) composed of porous silica particles was used as component (A), in Example 3, component (A2) composed of cellulose particles was used as component (A), in Example 4, component (A3) composed of talc particles was used as component (A), and in Example 5, component (A4) composed of non-porous silica particles was used as component (A). The content (mass %) of component (A) in the samples of Examples 1 to 6 was the same.

[0053] Table 1 shows the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) for the samples of Examples 1 to 6. For all of the samples of Examples 1 to 6, the mass ratios (C) / (A), (C1) / (A), (C1) / (C), and (C2) / (C) were within the ranges of the above-described embodiment. Furthermore, for all of the samples of Examples 1, 2, and 6 containing component (A1), the mass ratios (C1) / (A1) and (C2) / (A1) were within the ranges of the above-described embodiment.

[0054] Table 1 shows the evaluation results of the samples of Examples 1 to 6. With regard to dryness (after rinsing), good evaluation results were obtained for all of Examples 1 to 6, with particularly good evaluation results being obtained for Examples 1 to 3, which contained component (A1) or component (A2). With regard to the powder residual score, good evaluation results were obtained for all of Examples 1 to 6. With regard to dryness (after sweating), good evaluation results were obtained for all of Examples 1 to 6, with particularly good evaluation results being obtained for Examples 1 and 2, which contained component (A1), which did not have a large average particle size. With regard to the absence of unnatural whiteness, good evaluation results were obtained for all of Examples 1 to 6, with particularly good evaluation results being obtained for Examples 1 to 4 and 6, in which the average particle size of component (A) was not small.

[0055] *1) Porous silica Sunsphere (registered trademark) H-32 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 300 mL / 100 g) *2) Porous silica SILICA MICROBEAD P-4000 (manufactured by JGC Catalysts and Chemicals Co., Ltd., average particle size: approx. 11 μm, oil absorption: approx. 150 mL / 100 g) *5) CELLULOBEADS D-5 (manufactured by Daito Chemical Industry Co., Ltd., average particle size: 5 μm) *6) Talc JA-68R (manufactured by Asada Flour Milling Co., Ltd., average particle size: 9 to 12 μm) *7) KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 4.5) *9) KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *12) Purified water *13) Ethanol (concentration 95%) *14) Menthol JP (TAB) COS (manufactured by Takasago International Corporation) *16) Porous silica SILICA MICRO BEAD LB-1500 (average particle size: 14 μm, oil absorption: 230 mL / 100 g) *17) Non-porous silica TMS-01 (manufactured by Teika Corporation, average particle size: 1 μm, oil absorption: 40 mL / 100 g)

[0056] Examples 7 to 9 In Examples 7 to 9, samples of emulsion compositions composed of the components shown in Table 2 were prepared. In the samples of Examples 7 to 9, the content of component (A1) was changed compared to the sample of Example 1. In the samples of Examples 7 and 8, the content of component (A1) was lower compared to the sample of Example 1. In the sample of Example 9, the content of component (A1) was higher compared to the sample of Example 1.

[0057] Table 2 shows the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) for the samples according to Examples 7 to 9. For all of the samples according to Examples 7 to 9, the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) were within the ranges of the above embodiment.

[0058] Table 2 shows the evaluation results of the samples of Examples 7 to 9. With regard to the dry feeling (after rinsing), good evaluation results were obtained for all of Examples 7 to 9, but particularly good evaluation results were obtained for Examples 8 and 9, which had a relatively high content of component (A1). With regard to the powder residual score, good evaluation results were obtained for all of Examples 7 to 9. With regard to the dry feeling (after sweating), good evaluation results were obtained for all of Examples 7 to 9, but particularly good evaluation results were obtained for Examples 7 and 8, which had a relatively high content of component (A1). With regard to the absence of unnatural whiteness, good evaluation results were obtained for all of Examples 7 to 9, but particularly good evaluation results were obtained for Examples 7 and 8, which had a relatively low content of component (A1).

[0059] *1) Porous silica Sunsphere (registered trademark) H-32 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 300 mL / 100 g) *7) KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 4.5) *9) KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *12) Purified water *13) Ethanol (concentration 95%) *14) Menthol JP (TAB) COS (manufactured by Takasago International Corporation)

[0060] Examples 10 to 14 In Examples 10 to 14, samples of emulsion compositions composed of the components shown in Table 3 were prepared. In the samples of Examples 10 to 14, the type and content of component (B) used in the sample of Example 1 was varied. In the samples of Examples 10 to 12, a component (B) different from that used in the sample of Example 1 was used. In the sample of Example 13, the content of component (B) was lower than that of the sample of Example 1. In the sample of Example 14, the content of component (B) was higher than that of the sample of Example 1.

[0061] Table 3 shows the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) for the samples according to Examples 10 to 14. For all of the samples according to Examples 10 to 14, the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) were within the ranges of the above embodiment.

[0062] Table 3 shows the evaluation results of the samples of Examples 10 to 14. With regard to the dry feeling (after rinsing off), good evaluation results were obtained for all of Examples 10 to 14, but particularly good evaluation results were obtained for Examples 10 to 12, which had a content of component (B) that was neither too high nor too low. With regard to the powder residual score, good evaluation results were obtained for all of Examples 10 to 14, but particularly good evaluation results were obtained for Examples 10 and 11. With regard to the dry feeling (after sweating), good evaluation results were obtained for all of Examples 10 to 14, but particularly good evaluation results were obtained for Examples 10 and 11. With regard to the absence of unnatural whiteness, good evaluation results were obtained for all of Examples 10 to 14.

[0063] *1) Porous silica Sunsphere (registered trademark) H-32 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 300 mL / 100 g) *7) KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 4.5) *9) KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *12) Purified water *13) Ethanol (concentration 95%) *14) Menthol JP (TAB) COS (manufactured by Takasago International Corporation) *18) KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 4) *19) KF-6038 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 3) *20) KF-6012 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 7)

[0064] Examples 15 to 20 In Examples 15 to 20, samples of emulsion compositions composed of the components shown in Table 4 were prepared. In the samples of Examples 15 to 20, the type and content of component (C) used in the sample of Example 1 were varied. Specifically, in the samples of Examples 15 and 16, component (C1), a polar oil, was used as component (C). In the samples of Examples 17 and 20, a volatile oil was used as component (C). In the sample of Example 18, the content of component (C2) was higher than in the sample of Example 1. In the sample of Example 19, the type of component (C2) was different from that of the sample of Example 1.

[0065] Table 4 shows the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) for the samples according to Examples 15 to 20. For all of the samples according to Examples 15 to 20, the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) were within the ranges of the above embodiment.

[0066] Table 4 shows the evaluation results of the samples of Examples 15 to 20. With regard to the dry feeling (after rinsing off), good evaluation results were obtained for all of Examples 15 to 20, with particularly good evaluation results being obtained for Examples 15 to 17 and 19. With regard to the powder remaining score, good evaluation results were obtained for all of Examples 15 to 20, with particularly good evaluation results being obtained for Examples 15, 18 and 19, which had relatively high contents of component (C2). With regard to the dry feeling (after sweating), good evaluation results were obtained for all of Examples 15 to 20, with particularly good evaluation results being obtained for Examples 15 to 17 and 19. With regard to the absence of unnatural whiteness, good evaluation results were obtained for all of Examples 15 to 20.

[0067] *1) Porous silica Sunsphere (registered trademark) H-32 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 300 mL / 100 g) *7) KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 4.5) *9) KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *10) Exepar IPP (manufactured by Kao Corporation) *11) KF-96L-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *12) Purified water *13) Ethanol (concentration 95%) *14) Menthol JP (TAB) COS (manufactured by Takasago International Corporation) *21) Pearleem 4 (manufactured by NOF Corporation)

[0068] Examples 21 to 24 In Examples 21 to 24, samples of emulsion compositions were prepared, each composed of the components shown in Table 5. The sample of Example 21 had a lower content of component (E) composed of ethanol than the sample of Example 1. The samples of Examples 22 to 24 further contained component (F) composed of polyol than the sample of Example 1.

[0069] Table 5 shows the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) for the samples according to Examples 21 to 24. For all of the samples according to Examples 21 to 24, the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) were within the ranges of the above embodiment.

[0070] Table 5 shows the evaluation results of the samples of Examples 21 to 24. With regard to the dry feel (after rinsing), good evaluation results were obtained for all of Examples 21 to 24, with Example 22 obtaining a particularly good evaluation result. With regard to the powder remaining score, good evaluation results were obtained for all of Examples 21 to 24, with Example 22 obtaining a particularly good evaluation result. With regard to the dry feel (after sweating), good evaluation results were obtained for all of Examples 21 to 24, with Example 22 obtaining a particularly good evaluation result. With regard to the absence of unnatural whiteness, good evaluation results were obtained for all of Examples 21 to 24.

[0071] *1) Porous silica Sunsphere (registered trademark) H-32 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 300 mL / 100 g) *7) KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 4.5) *9) KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *12) Purified water *13) Ethanol (concentration 95%) *14) Menthol JP (TAB) COS (manufactured by Takasago International Corporation) *15) 1,3-Butylene glycol

[0072] Comparative Examples 1 to 5 In Comparative Examples 1 to 5, samples of emulsion compositions composed of the components shown in Table 6 were prepared. The sample of Comparative Example 1 differs from the above-described embodiment in that it contains component (B') having a larger HLB value than component (B) and is configured as an oil-in-water emulsion. The sample of Comparative Example 2 differs from the above-described embodiment in that it contains component (A') composed of spherical silica particles having an average particle size (16 nm) smaller than component (A). The sample of Comparative Example 3 differs from the above-described embodiment in that it contains component (A') composed of spherical silica particles having an average particle size (55 μm) larger than component (A). The sample of Comparative Example 4 differs from the above-described embodiment in that the content of component (A) is greater than 4% by mass. The sample of Comparative Example 5 differs from the above-described embodiment in that the content of component (A) is less than 0.5% by mass.

[0073] Table 6 shows the mass ratios (C) / (A), (C1) / (A), (C1) / (A1), (C2) / (A1), (C1) / (C), and (C2) / (C) for the samples according to Comparative Examples 1 to 5. For all of the samples according to Comparative Examples 1 to 5, the mass ratios (C) / (A), (C1) / (A), (C1) / (C), and (C2) / (C) were within the ranges of the above-described embodiment. Furthermore, for the sample according to Comparative Example 3, which contained component (A1), the mass ratios (C1) / (A1) and (C2) / (A1) were also within the ranges of the above-described embodiment.

[0074] Table 6 shows the evaluation results of the samples according to Comparative Examples 1 to 5. With regard to the dry feeling (after rinsing off), all of the samples according to the above Examples obtained better evaluation results than the samples according to Comparative Examples 1 to 5. With regard to the powder residual score, all of the samples according to the above Examples obtained better evaluation results than the oil-in-water sample according to Comparative Example 1. With regard to the dry feeling (after sweating), all of the samples according to the above Examples obtained better evaluation results than the samples according to Comparative Examples 1 to 5. With regard to the absence of unnatural whiteness, all of the samples according to Comparative Examples 1 to 5 obtained good evaluation results.

[0075] *1) Porous silica Sunsphere (registered trademark) H-32 (manufactured by AGC Si-Tech Co., Ltd., average particle size: 3 μm, oil absorption: 300 mL / 100 g) *3) AEROSIL (registered trademark) R972 (manufactured by Nippon Aerosil Co., Ltd., average particle size: 16 nm) *4) COSMESILICA BQ60 (manufactured by Fuji Silysia Chemical Ltd., average particle size: 55 μm) *7) KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd., HLB value: 4.5) *8) Emulgen 1620G (manufactured by Kao Corporation, HLB value: 10.5) *9) KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *12) Purified water *13) Ethanol (concentration 95%) *14) Menthol JP (TAB) COS (manufactured by Takasago International Corporation)

[0076] According to the present invention, a rinse-off emulsion composition can enhance the smooth feeling of the skin after rinsing.

Claims

1. A method for using a water-in-oil emulsion composition, After applying an emulsified composition containing the following ingredients (A) to (D) to bare skin, rinse it off without wiping. Method of using the emulsified composition. (A) Powder composed of spherical particles with a particle diameter of 0.5 μm or more and 35 μm or less: 0.5% by mass or more and 10% by mass or less (B) Surfactants with an HLB value of 1 or more and 8 or less: 0.3% to 4% by mass (C) Liquid oil at 25°C: 10% to 80% by mass (D) Water 5% by mass or more and 78% by mass or less

2. A water-in-oil emulsion composition, It contains the following ingredients (A) to (D) and is intended to be applied to bare skin and then washed off without wiping. Emulsifying composition. (A) Powder composed of spherical particles with a particle diameter of 0.5 μm or more and 35 μm or less: 0.5% by mass or more and 10% by mass or less (B) Surfactants with an HLB value of 1 or more and 8 or less: 0.3% to 4% by mass (C) Liquid oil at 25°C: 10% to 80% by mass (D) Water 5% by mass or more and 78% by mass or less

3. A rinse-off type water-in-oil emulsion composition, An emulsified composition containing the following components (A) to (D). (A) Powder composed of spherical particles with a particle diameter of 0.5 μm or more and 35 μm or less: 0.5% by mass or more and 10% by mass or less (B) Surfactants with an HLB value of 1 or more and 8 or less: 0.3% to 4% by mass (C) Liquid oil at 25°C: 10% to 80% by mass (D) Water 5% by mass or more and 78% by mass or less

4. The aforementioned component (A) includes component (A1) which is composed of porous silica particles. The emulsified composition according to claim 3.

5. The mass ratio (C) / (A) of component (C) to component (A) is 1 or more and 60 or less. The emulsified composition according to claim 3 or 4.

6. The aforementioned component (C) includes component (C1) which is composed of a non-volatile oil. The emulsified composition according to claim 3 or 4.

7. The mass ratio (C1) / (C) of component (C1) to component (C) is 0.3 or more and 1 or less. The emulsifying composition according to claim 6.

8. The aforementioned component (C) includes component (C2) which is composed of a nonpolar, non-volatile oil. The emulsifying composition according to claim 6.

9. The mass ratio (C2) / (C) of the aforementioned component (C2) to the aforementioned component (C) is 0.3 or more and 1 or less. The emulsified composition according to claim 8.

10. The mass ratio (C2) / (A) of component (C2) to component (A) is 1 or more and 60 or less. The emulsified composition according to claim 8.

11. The aforementioned component (A) includes component (A1) which is composed of porous silica particles. The mass ratio (C2) / (A1) of component (C2) to component (A1) is 1 or more and 60 or less. The emulsified composition according to claim 8.