Emulsified composition

Abstract

An emulsified composition comprising the following components (A), (B), (C), (D) and (E): (A) 0.1 to 20% by mass of an oily component having a melting point of 50 to 150° C., (B) 1 to 30% by mass of octamethyltrisiloxane, (C) 1 to 20% by mass of an α-olefin oligomer, (D) a nonionic surfactant, and (E) water.

Description

Technical Field

[0001] The present invention relates to an emulsified composition. Background Art

[0002] Although emulsion compositions containing high-melting-point solid fats such as ceramides can be expected to have a high moisturizing effect, they have problems in stability such as crystal precipitation and separation. For example, emulsions containing ceramides, phospholipid derivatives, dextrin fatty acid esters and polyglycerol fatty acid esters have been studied (Patent Document 1).

[0003] Furthermore, not only the stability of ceramides was studied, but also the improvement of the skin's moisture retention and feel after application was studied.

[0004] For example, Patent Document 2 describes that a coating film of a water-in-oil emulsion composition containing ceramides, polyglycerol fatty acid esters, a specific lipophilic surfactant, dextrin fatty acid esters, a hydrocarbon oil that is liquid at 25° C., and water has high water retention and good skin protection and glossiness; Patent Document 3 describes that an emulsified cosmetic containing ceramides, meadowfoam estolide, cholesterol and / or phytosterol, a nonionic surfactant, an oil (excluding meadowfoam estolide, cholesterol and phytosterol), and water is stably formulated with ceramide, is non-sticky, and has excellent usability.

[0005] (Patent Document 1) Japanese Patent Application Publication No. 2008-156342

[0006] (Patent Document 2) Japanese Patent Application Publication No. 2019-85390

[0007] (Patent Document 3) Japanese Patent Application Publication No. 2016-108243 Summary of the invention

[0008] The present invention relates to an emulsified composition comprising the following components (A), (B), (C), (D) and (E):

[0009] (A) Oily component with a melting point of 50 to 150°C: 0.1 to 20% by mass,

[0010] (B) octamethyltrisiloxane: 1 to 30% by mass,

[0011] (C) α-olefin oligomer: 1 to 20% by mass,

[0012] (D) nonionic surfactants,

[0013] (E) Water. DETAILED DESCRIPTION

[0014] In a low temperature and low humidity environment, the skin tends to dry out easily, and therefore requires moisturizing. Therefore, by applying an emulsified composition with a high moisturizing effect containing high melting point solid fats such as ceramides to the skin, the skin's moisturizing feeling can be continuously improved, resulting in moisturized and hydrated skin.

[0015] On the other hand, as in the summer of Japan, frequently going in and out of the high temperature and humidity outdoor and the low humidity indoor environment caused by air conditioning, there are many people who are also worried about dry skin in summer. Such people, in order to continuously improve the moisturizing feeling of the skin under the low humidity caused by air conditioning, form a moist skin with moisturizing property, preferably also apply the high emulsified skin care agent of the moisturizing effect of the solid fat with high melting point such as ceramides in summer. However, if the existing emulsified skin care agent comes to the high temperature and humidity outdoor, there is the situation of the uncomfortable feeling of the skin feeling stuffy and burning. Therefore, even if the existing emulsified skin care agent containing the solid fat with high melting point such as ceramides has a high skin care effect, it is not suitable for use for people who are worried about being dry under the high temperature and humidity atmospheric environment of going in and out of summer and under the low humidity indoor state in summer caused by air conditioning.

[0016] The present invention relates to an emulsified composition containing a high melting point solid lipid, which has a high moisturizing effect that makes the skin moisturized and hydrated, and does not cause uncomfortable feeling of stuffiness and burning to the skin even in a high temperature and high humidity environment.

[0017] The present inventors have found that an emulsified composition that solves the above-mentioned problems can be obtained by combining an oily component having a specific melting point, octamethyltrisiloxane, an α-olefin oligomer, a nonionic surfactant, and water.

[0018] The emulsified composition of the present invention can stably contain high-melting-point oily components such as ceramides, and the skin after application can be kept moisturized and hydrated, and the moisturization can be sustained, and the heat sensation can be reduced even in a high-temperature and high-humidity environment, resulting in a reduction in the burden on the skin.

[0019] The term "heat sensation" refers to a feeling of stuffiness that occurs when the composition is applied to the skin and the skin is exposed to high temperature and high humidity above a certain level.

[0020] The component (A) used in the present invention is an oily component having a melting point of 50 to 150°C and being solid at room temperature (5 to 35°C). Examples of such oily components include: sphingolipids such as ceramides and sphingosines (including natural and synthetic products); sterols such as cholesterol, dehydrocholesterol, β-sitosterol, stearoyl cholesterol ester, isostearyl cholesterol ester, vegetable oil fatty acid cholesterol ester, and similar compounds; C-1-6-hydroxy-1 ...16 -C 22 Fatty acids: cetyl alcohol, stearyl alcohol, behenyl alcohol, batyl alcohol, squalane alcohol, etc. 16 -C 22 Higher alcohols and similar compounds thereof, etc. Component (A) is generally a component not defined as a surfactant and is a component different from component (D). In addition, component (A) is an α-olefin oligomer other than component (C), that is, an oligomer obtained by polymerizing and hydrogenating a linear aliphatic α-olefin having 4 to 12 carbon atoms.

[0021] Examples of ceramides include natural ceramides, sphingosine derivatives, and ceramide-like structural substances described in Japanese Patent Application Laid-Open No. 62-228048, Japanese Patent Application Laid-Open No. 63-216812, Japanese Patent Application Laid-Open No. 63-227513, Japanese Patent Application Laid-Open No. 64-29347, Japanese Patent Application Laid-Open No. 64-31752, Japanese Patent Application Laid-Open No. 8-319263, etc. Specifically, from the viewpoint of improving the glossiness of the appearance, improving the ease of application and spreading, improving the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity, preferably, the compound selected from the following general formula (1) and (2) is used, and the compound of general formula (1) is particularly preferred.

[0022]

[0023] [Where R 1 represents a hydrocarbon group having 10 to 26 carbon atoms, R 2 represents a hydrocarbon group having 9 to 25 carbon atoms, and X represents -(CH2) n -(wherein n represents an integer from 2 to 6.)]

[0024]

[0025] (Where R 3 With R 4 are the same or different and represent a hydrocarbon group having 1 to 40 carbon atoms which may be hydroxylated, R 5 represents an alkylene group having 1 to 6 carbon atoms or a single bond, R 6 represents a hydrogen atom, an alkoxy group having 1 to 12 carbon atoms, or a 2,3-dihydroxypropoxy group. 5 When it is a single bond, R 6 is a hydrogen atom.)

[0026] In the above general formulae (1) and (2), the hydrocarbon group is preferably an alkyl group or an alkenyl group.

[0027] Examples of compounds of the general formula (1) include N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide (INCI name: Cetyl-PG Hydroxyethyl Palmitamide), and examples of compounds of the general formula (2) include long-chain dibasic acid-bis(3-methoxypropylamide).

[0028] The compound represented by the general formula (1) is a ceramide-like compound and is a ceramide functional component that can complement the effect of ceramide and improve skin condition (water content, etc.).

[0029] Among these components (A), it is preferred to contain ceramides (particularly natural ceramides, sphingosines, compounds of the general formulas (1) and (2)), C 16 -C 22 Fatty acids, C 16 -C 22 One or more kinds selected from higher alcohols, preferably ceramides and C 16 -C 22 From the viewpoint of improving stability at high temperatures, improving the sustainability of the skin's moisturizing feeling after application, and reducing the burden on the skin by reducing the sensation of heat under high temperature and high humidity, one or more selected from the higher alcohols preferably contain ceramides, and further preferably contain one or more compounds selected from the above-mentioned general formula (1) and the above-mentioned general formula (2) which reduce the burden on the skin by reducing the sensation of heat under high temperature and high humidity. Further preferably, it contains a compound of the above-mentioned general formula (1), and most preferably contains N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanoic acid amide.

[0030] Among these components (A), ceramides (particularly natural ceramides, sphingosines, compounds of the general formulas (1) and (2)), C 16 -C 22 Fatty acids, C 16 -C 22 One or more selected from higher alcohols, more preferably ceramides and C 16 -C 22From the viewpoint of improving stability at high temperatures, improving the sustainability of the skin's moisturizing feeling after application, and reducing the burden on the skin by reducing the sensation of heat under high temperature and high humidity, one or more of the higher alcohols are further preferably ceramides. From the viewpoint of reducing the burden on the skin by reducing the sensation of heat under high temperature and high humidity, one or more compounds selected from the above-mentioned general formula (1) and the above-mentioned general formula (2) are further more preferred. The compound of the above-mentioned general formula (1) is most preferred, and N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanoic acid amide is further most preferred.

[0031] In addition, component (A) contains ceramides, C 16 -C 22 Fatty acids, C 16 -C 22 In the case of higher alcohols, ceramides and C in component (A) are used from the viewpoints of improving stability at high temperatures, improving the glossiness of the appearance, improving the ease of application and spreading, improving the moisturizing feeling of the skin after application, improving the sustainability of the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity. 16 -C 22 Fatty acids, C 16 -C 22 The total content of the higher alcohols in component (A) is preferably 20 to 100 mass %, more preferably 30 to 100 mass %, further preferably 50 to 100 mass %, further more preferably 75 to 100 mass %, further more preferably 85 to 100 mass %, and most preferably substantially 100 mass %.

[0032] Furthermore, when component (A) contains ceramides, the content ratio of ceramides in component (A) is preferably 20 to 100% by mass, more preferably 30 to 100% by mass, further preferably 50 to 100% by mass, further more preferably 75 to 100% by mass, further more preferably 85 to 100% by mass, and most preferably substantially 100% by mass, in terms of improving stability at high temperatures, improving the duration of moisturizing feeling after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity.

[0033] Furthermore, when component (A) contains one or more compounds selected from the above-mentioned general formula (1) and the above-mentioned general formula (2), from the viewpoint of further reducing the burden on the skin by reducing the thermal sensation under high temperature and high humidity, the content ratio of one or more compounds selected from the above-mentioned general formula (1) and the above-mentioned general formula (2) in component (A) is preferably 20 to 100 mass %, more preferably 30 to 100 mass %, further preferably 50 to 100 mass %, further more preferably 75 to 100 mass %, further more preferably 85 to 100 mass %, and most preferably substantially 100 mass %.

[0034] Furthermore, when component (A) contains N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide, from the viewpoint of further reducing the burden on the skin by reducing the sensation of heat under high temperature and high humidity, the content ratio of N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide in component (A) is preferably 20 to 100% by mass, more preferably 30 to 100% by mass, further preferably 50 to 100% by mass, further more preferably 75 to 100% by mass, further more preferably 85 to 100% by mass, and most preferably substantially 100% by mass.

[0035] Furthermore, component (A) contains ceramides and C 16 -C 22 Fatty acids, C 16 -C 22 In the case of higher alcohols, from the viewpoint of improving stability at high temperatures, the ceramides in component (A) and C 16 -C 22 Fatty acids, C 16 -C 22 Of the total amount of higher alcohols, C 16 -C 22 Fatty acids, C 16 -C 22 The total content of the higher alcohols is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0036] Furthermore, component (A) contains ceramides and C 16 -C 22 In the case of fatty acids, from the viewpoint of improving stability at high temperatures, the ceramides in component (A) and C 16 -C 22 Of the total amount of fatty acids, C 16 -C 22The total content of fatty acids is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0037] Furthermore, component (A) contains ceramides and C 16 -C 22 In the case of higher alcohols, from the viewpoint of improving stability at high temperatures, the ceramides in component (A) and C 16 -C 22 Of the total amount of higher alcohols, C 16 -C 22 The total content of the higher alcohols is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0038] In addition, component (A) contains N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide and C 16 -C 22 Fatty acids, C 16 -C 22 In the case of a higher alcohol, from the viewpoint of improving stability at high temperatures, N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide and C 16 -C 22 Fatty acids, C 16 -C 22 Of the total amount of higher alcohols, C 16 -C 22 Fatty acids, C 16 -C 22 The total content of the higher alcohols is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0039] The oily component of component (A) can be used in one kind or in combination of two or more kinds, and its content is 0.1% by mass or more, preferably 2% by mass or more, more preferably 5% by mass or more, and 20% by mass or less, preferably 15% by mass or less, and further preferably 9% by mass or less in the total composition from the viewpoint of improving stability at room temperature and high temperature, improving ease of application and extension, improving the moisturizing feeling of the skin after application, improving the sustainability of the moisturizing feeling, and reducing the sense of heat. In addition, the content of component (A) is 0.1-20% by mass, more preferably 2-15% by mass, and further preferably 5-9% by mass in the total composition.

[0040] Octamethyltrisiloxane (trisiloxane) of the component (B) is a compound represented by the following formula and is a silicone oil having a viscosity of about 1 cs at 25°C.

[0041]

[0042] The viscosity of the component (B) was measured using a B-type viscometer (TVB10 type viscometer, manufactured by Toki Sangyo Co., Ltd.) at 25° C., a rotation speed of 12 rpm, a measurement time of 60 seconds, and a rotor No. 1.

[0043] The content of component (B) is 1% by mass or more, preferably 1.5% by mass or more, more preferably 2% by mass or more, and further preferably 5% by mass or more, and is 30% by mass or less, preferably 20% by mass or less, further preferably 13% by mass or less, and further preferably 8.5% by mass or less in terms of improving the glossiness of the appearance, improving the ease of application and extension, improving the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity. In addition, the content of component (B) is 1 to 30% by mass, preferably 1.5 to 20% by mass, more preferably 2 to 13% by mass, and further preferably 5 to 8.5% by mass in the total composition.

[0044] The α-olefin oligomer of component (C) is an oligomer obtained by polymerizing and hydrogenating a linear aliphatic α-olefin having 4 to 12 carbon atoms. Component (C) of the present invention is a component different from the oily component (A) having a melting point of 50 to 150°C.

[0045] The molecular weight of the α-olefin oligomer of the component (C) is preferably 300 or more, more preferably 330 or more, further preferably 360 or more, further more preferably 400 or more, and preferably 800 or less, more preferably 700 or less, further preferably 600 or less, further more preferably 500 or less, from the viewpoint of improving the glossiness of the appearance, improving the moist feeling of the skin after application, improving the sustainability of the moist feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity. In addition, the molecular weight of the α-olefin oligomer of the component (C) is preferably 300 to 800, more preferably 330 to 700, further preferably 360 to 600, further more preferably 400 to 500.

[0046] In addition, the molecular weight of the component (C) here is a weight average molecular weight, and is obtained by measuring by SEC analysis in terms of polystyrene.

[0047] Furthermore, the viscosity of the α-olefin oligomer of component (C) at 25°C is preferably 5 mPa·s or more, more preferably 8 mPa·s or more, further preferably 12 mPa·s or more, further more preferably 15 mPa·s or more, preferably 50 mPa·s or less, more preferably 45 mPa·s or less, further preferably 30 mPa·s or less, further more preferably 25 mPa·s or less, from the viewpoint of improving the glossiness of the appearance, improving the moisturizing feeling of the skin after application, improving the sustainability of the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity. In addition, the viscosity of the α-olefin oligomer of component (C) at 25°C is preferably 5 to 50 mPa·s, more preferably 8 to 45 mPa·s, further preferably 12 to 30 mPa·s, further more preferably 15 to 25 mPa·s.

[0048] The viscosity at 25° C. was measured using a B-type viscometer (TVB10 type viscometer, manufactured by Toki Sangyo Co., Ltd.) under the conditions of a rotation speed of 12 rpm, a measurement time of 60 seconds, and a rotor No. 1.

[0049] The olefin part of the α-olefin oligomer of the component (C) is obtained by polymerizing and hydrogenating a linear aliphatic α-olefin having 4 to 12 carbon atoms, preferably a linear aliphatic α-olefin having 6 to 12 carbon atoms, more preferably a linear aliphatic α-olefin having 8 to 12 carbon atoms, and still more preferably a linear aliphatic α-olefin having 10 carbon atoms. Furthermore, if it is a linear aliphatic α-olefin having 4 to 12 carbon atoms, it may be obtained by polymerizing a single linear aliphatic α-olefin having the same carbon number, or may be obtained by polymerizing a plurality of linear aliphatic α-olefins having the same carbon number, but it is preferably obtained by polymerizing a single linear aliphatic α-olefin having the same carbon number.

[0050] The α-olefin oligomer of component (C) is an oligomer obtained by polymerizing a linear aliphatic α-olefin having 4 to 12 carbon atoms, and the degree of polymerization is preferably 3 to 6, and more preferably 3 to 4, from the viewpoint of improving the sustainability of the moisturizing feeling of the skin after application and reducing the sense of burden on the skin by reducing the sense of heat under high temperature and high humidity. The degree of polymerization may be composed of a single component of the degree of polymerization in component (C), or may be composed of components of multiple degrees of polymerization. From the viewpoint of improving the moisturizing feeling of the skin after application, improving the sustainability of the moisturizing feeling of the skin after application, and reducing the sense of burden on the skin by reducing the sense of heat under high temperature and high humidity, it is usually preferably composed of components of multiple degrees of polymerization.

[0051] The degree of polymerization of component (C) herein refers to a value calculated by dividing the above-mentioned weight average molecular weight by the molecular weight of the monomer. When the monomer is composed of a plurality of molecules, it is calculated by dividing by the average molecular weight of the monomer.

[0052] The types and composition ratios of monomers constituting the α-olefin oligomers can be obtained by general machine analysis, for example, by GC-MS or LC-MS, or by NMR in addition to GC-MS or LC-MS. The average molecular weight of the monomers is calculated from the types and composition ratios of the monomers obtained from the above measurement results.

[0053] As component (C), from the viewpoint of improving the sustainability of the skin's moisturizing feeling after application and reducing the burden on the skin by reducing the sensation of heat under high temperature and high humidity, the constituent ratio of the degree of polymerization of 3 to 4 in component (C) is preferably 50% by mass or more, more preferably 65% ​​by mass or more, further preferably 80% by mass or more, and further more preferably substantially 100% by mass.

[0054] Furthermore, as component (C), from the viewpoint of improving the sustainability of the skin's moisturizing feeling after application and reducing the burden on the skin by reducing the sensation of heat under high temperature and high humidity, it is preferred that the constituent ratio of the component (C) having a degree of polymerization of 5 or more is less than 50% by mass, more preferably less than 35% by mass, further preferably less than 20% by mass, and further more preferably substantially not contained.

[0055] As the α-olefin oligomer of component (C), commercially available products such as “SILKFLO 364 (molecular weight: 444, viscosity at 25°C: 23.7 mPa·s)” and “SILKFLO 366 (molecular weight: 556, viscosity at 25°C: 43.6 mPa·s)” (both manufactured by Vantage Corporation) can be used.

[0056] The content of component (C) is 1% by mass or more, preferably 2% by mass or more, more preferably 4% by mass or more, and 20% by mass or less, preferably 13% by mass or less, and more preferably 8% by mass or less in terms of improving the glossiness of the appearance, improving the ease of application and spreading, improving the sustainability of the skin's moisturizing feeling after application, and reducing the sense of heat. In addition, the content of component (C) is 1 to 20% by mass, preferably 2 to 13% by mass, and more preferably 4 to 8% by mass in the total composition.

[0057] In the present invention, the mass ratio (A) / (B) of component (A) relative to component (B) is preferably 0.1 or more, more preferably 0.38 or more, further preferably 0.6 or more, further preferably 1 or more, further more preferably 1.08 or more, preferably 10 or less, more preferably 5 or less, further preferably 3.3 or less, further more preferably 1.9 or less, further more preferably 1.4 or less, from the viewpoint of improving the glossiness of the appearance, improving the ease of application and spreading, improving the moisturizing feeling of the skin after application, improving the sustainability of the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity. In addition, the mass ratio (A) / (B) of component (A) relative to component (B) is preferably 0.1 to 10, more preferably 0.38 to 5, further preferably 0.6 to 3.3, further more preferably 1 to 1.9, further more preferably 1.08 to 1.4.

[0058] In the present invention, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.1 or more, more preferably 0.4 or more, further preferably 0.67 or more, further more preferably 1.1 or more, and preferably 10 or less, more preferably 5 or less, further preferably 3.3 or less, further more preferably 2.1 or less, from the viewpoint of improving the glossiness of the appearance, improving the ease of application and spreading, improving the moisturizing feeling of the skin after application, and improving the sustainability of the moisturizing feeling of the skin after application. In addition, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.1 to 10, more preferably 0.4 to 5, further preferably 0.67 to 3.3, further more preferably 1.1 to 2.1.

[0059] In the present invention, the mass ratio (B) / (C) of component (B) relative to component (C) is preferably 0.1 or more, more preferably 0.48 or more, further preferably 0.6 or more, further preferably 0.8 or more, further more preferably 0.93 or more, preferably 10 or less, more preferably 5 or less, further preferably 3.3 or less, further more preferably 1.8 or less, further more preferably 1.47 or less, from the viewpoint of improving the glossiness of the appearance, improving the ease of application and spreading, improving the moisturizing feeling of the skin after application, improving the sustainability of the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity. In addition, the mass ratio (B) / (C) of component (B) relative to component (C) is preferably 0.1 to 10, more preferably 0.48 to 5, further preferably 0.6 to 3.3, further more preferably 0.8 to 1.8, further more preferably 0.93 to 1.47.

[0060] Component (D) is a nonionic surfactant, and a known nonionic surfactant can be used. Component (D) of the present invention is a component different from the oily component (A) having a melting point of 50 to 150°C.

[0061] Specifically, polyglycerol fatty acid esters, glycerol fatty acid esters, propylene glycol fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyethylene glycol fatty acid esters, alkyl glyceryl ethers, alkyl polyglyceryl ethers, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ether fatty acid esters, polyoxyethylene alkylamines, silicone surfactants, and the like are listed.

[0062] Examples of the polyoxyethylene sorbitan fatty acid esters include polyoxyethylene sorbitan fatty acid esters having an average addition mole number of polyoxyethylene chains constituting the polyoxyethylene sorbitan fatty acid ester of 10 to 20, and specific examples thereof include polyoxyethylene sorbitan monostearate (20 EO).

[0063] Examples of the polyoxyethylene hydrogenated castor oil include polyoxyethylene hydrogenated castor oils having an average number of added moles of polyoxyethylene chains constituting the polyoxyethylene hydrogenated castor oil of 10 to 100, and specific examples thereof include PEG-10 hydrogenated castor oil.

[0064] Examples of the polyoxyethylene hydrogenated castor oil fatty acid ester include polyoxyethylene hydrogenated castor oil fatty acid esters having an average added mole number of polyoxyethylene chains constituting the polyoxyethylene hydrogenated castor oil fatty acid ester of 10 to 100, and specific examples thereof include PEG-15 hydrogenated castor oil isostearate.

[0065] Specific examples of the alkyl glyceryl ether include 2-ethylhexyl glyceryl ether, isododecyl glyceryl ether, and isostearyl glyceryl ether.

[0066] Specific examples of silicone surfactants include polyether-modified silicones such as PEG-3 polydimethylsiloxane, PEG-10 polydimethylsiloxane, and PEG-12 polydimethylsiloxane; polyether·alkyl co-modified silicones, polyglycerol-modified silicones, polyglycerol·alkyl co-modified silicones, and alkyl silicone dendrimer polyether-modified silicones.

[0067] Examples of the silicone-based surfactant include silicones having a straight or branched main chain silicone chain, and silicones having a crosslinked or non-crosslinked silicone chain.

[0068] As component (D), from the viewpoint of forming a stable water-in-oil emulsion composition, improving stability at high temperatures, improving ease of application and spread, improving the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity, it is preferred that at least one or two or more selected from silicone surfactants, polyoxyethylene hydrogenated castor oil, alkyl glyceryl ether, and sorbitan fatty acid esters be contained. It is more preferred that at least one or two or more selected from silicone surfactants, polyoxyethylene hydrogenated castor oil, and alkyl glyceryl ethers be contained. It is further preferred that at least one or two or more selected from alkyl glyceryl ethers and silicone surfactants be contained.

[0069] In addition, as for polyoxyethylene hydrogenated castor oil, the average added mole number of the polyoxyethylene chain constituting the polyoxyethylene hydrogenated castor oil is preferably 10-100, more preferably 10-60, further preferably 10-40, further more preferably 10-20, further more preferably 10.

[0070] As the sorbitan fatty acid ester, sorbitan monostearate is preferred.

[0071] As the alkyl glyceryl ether, one or more selected from 2-ethylhexyl glyceryl ether, isododecyl glyceryl ether, and isostearyl glyceryl ether are preferred, and isostearyl glyceryl ether is more preferred.

[0072] The silicone surfactant is preferably at least one or two or more selected from polyether-modified silicone, polyglycerin-modified silicone, polyether·alkyl co-modified silicone, and polyglycerin·alkyl co-modified silicone, more preferably at least one or two or more selected from polyether-modified silicone and polyether·alkyl co-modified silicone, further preferably polyether-modified silicone, further more preferably a polyether-modified silicone having a straight silicone chain as the main chain, further more preferably at least one or two or more selected from PEG-3 polydimethylsiloxane, PEG-10 polydimethylsiloxane, and PEG-12 polydimethylsiloxane, and most preferably at least one or more selected from PEG-3 polydimethylsiloxane and PEG-12 polydimethylsiloxane.

[0073] Furthermore, it is preferred to contain both an alkyl glyceryl ether and a silicone surfactant. When both an alkyl glyceryl ether and a silicone surfactant are contained, from the viewpoint of forming a stable water-in-oil emulsion composition, improving stability at high temperatures, improving ease of application and spreading, improving the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity, it is preferred to contain isostearyl glyceryl ether and a polyether-modified silicone. It is more preferred to contain isostearyl glyceryl ether and one or more selected from PEG-3 dimethicone, PEG-10 dimethicone, and PEG-12 dimethicone. It is further preferred to contain isostearyl glyceryl ether and one or more selected from PEG-3 dimethicone and PEG-12 dimethicone. It is even more preferred to contain isostearyl glyceryl ether and PEG-3 dimethicone and PEG-12 dimethicone. It is even more preferred to contain isostearyl glyceryl ether and PEG-3 dimethicone.

[0074] As component (D), from the viewpoint of forming a stable oil-in-water emulsion composition, improving stability at high temperatures, improving ease of application and spread, improving the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity, it is preferred that the component (D) contains at least one or two or more selected from silicone surfactants, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene hydrogenated castor oil fatty acid esters, more preferably contains at least one or two or more selected from sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene hydrogenated castor oil, and further preferably contains at least one or more selected from sorbitan fatty acid esters and polyoxyethylene sorbitan fatty acid esters.

[0075] In addition, as a sorbitan fatty acid ester, sorbitan monostearate is preferable.

[0076] As the polyoxyethylene sorbitan fatty acid ester, the average number of added moles of the polyoxyethylene chains constituting the polyoxyethylene sorbitan fatty acid ester is preferably 10 to 20, more preferably 20, and further preferably polyoxyethylene sorbitan monostearate (20 EO).

[0077] As for the polyoxyethylene hydrogenated castor oil, the average added mole number of the polyoxyethylene chain constituting the polyoxyethylene hydrogenated castor oil is preferably 20 to 100, more preferably 40 to 80, and even more preferably 50 to 60.

[0078] As for the polyoxyethylene hydrogenated castor oil fatty acid ester, the average added mole number of the polyoxyethylene chain constituting the polyoxyethylene hydrogenated castor oil fatty acid ester is preferably 20 to 100, more preferably 40 to 80, and even more preferably 50 to 60.

[0079] Furthermore, when the emulsion composition is a water-in-oil emulsion composition, the nonionic surfactant of component (D) preferably has an HLB value of 1 to 7, more preferably 1 to 6, and even more preferably 2 to 6, from the viewpoint of not impairing water resistance due to sweat when applied under high temperature and humidity, from the viewpoint of forming a stable water-in-oil emulsion composition, and from the viewpoint of improving stability at room temperature and high temperature. Here, when component (D) is composed of two or more surfactants, it is preferably composed of only HLB values ​​of 1 to 7, more preferably 1 to 6, and even more preferably 2 to 6, from the viewpoint of not impairing water resistance due to sweat when applied under high temperature and humidity, from the viewpoint of forming a stable water-in-oil emulsion composition, and from the viewpoint of improving stability at high temperature.

[0080] Furthermore, when the emulsion composition is an oil-in-water emulsion composition, the nonionic surfactant of component (D) preferably has an HLB value of 8 to 18, more preferably 8 to 16, and even more preferably 8 to 14 from the viewpoint of forming a stable oil-in-water emulsion composition. Here, when component (D) is composed of two or more surfactants, it is preferably composed of only those with an HLB value of 8 to 18, more preferably 8 to 16, and even more preferably 8 to 14 from the viewpoint of forming a stable water-in-oil emulsion composition and improving stability at high temperatures.

[0081] Here, HLB (Hydrophilic-Lipophilic Balance) represents the molecular weight of the hydrophilic group in the total molecular weight of the surfactant, and is obtained using Griffin's formula. In addition, when it is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is obtained as follows. The HLB of the mixed surfactant is obtained by adding the HLB values ​​of each nonionic surfactant according to their mixing ratio and calculating the average.

[0082] Mixed HLB = Σ(HLBx×Wx) / ΣWx

[0083] HLBx represents the HLB value of nonionic surfactant X.

[0084] Wx represents the mass (g) of the nonionic surfactant X having the HLBx value.

[0085] As the nonionic surfactant of component (D), for example, as isostearyl glyceryl ether, "PENETOL GE-IS (HLB: 2)" (manufactured by Kao Corporation) can be used; as the polyether-modified silicone, as PEG-3 dimethicone, "KF-6015 (HLB: 4.5)", as PEG-11 methyl ether dimethicone, "KF-6011 (HLB: 14.5)", "KF-6011P (HLB: 14.5)", as PEG-10 dimethicone, "KF-6043 (HLB: 14.5)", "Silicone KF-6017 (HLB: 4.5)", as PEG-9 polydimethylsiloxyethyl dimethicone, "Silicone KF-6028 (HLB: 4.0)" (all manufactured by Shin-Etsu Chemical Co., Ltd.); PEG-12 dimethicone "SH-3775M (HLB: 5)", "SH-3771M (HLB: 13)", "SS-2804 (HLB: 13)", as a mixture of PEG / PPG-19 / 19 dimethicone and cyclopentasiloxane "Silicone BY11-030 (HLB: 3.0)", "Silicone BY22-008M (HLB: 2.0)" (all manufactured by Toray Dow Corning Silicone Co., Ltd.); as polyoxyethylene hydrogenated castor oil, PEG-5 hydrogenated castor oil "EMALEX HC-5 (HLB: 5.0)" (manufactured by Nihon Emulsion Co., Ltd.), as PEG-10 hydrogenated castor oil "NIKKOL Commercially available products include PEG-15 hydrogenated castor oil triisostearate "EMALEXRWIS-315 (HLB: 5.0)" (both manufactured by Nihon Emulsion Co., Ltd.), and the like.

[0086] The nonionic surfactant of component (D) can be used in one or more kinds, and the content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, further preferably 1% by mass or more, further more preferably 1.5% by mass or more, preferably 8% by mass or less, more preferably 5% by mass or less, further preferably 3.5% by mass or less, further more preferably 3% by mass or less, in the total composition, from the viewpoint of forming a stable emulsified composition and improving the stability at room temperature and high temperature. In addition, the content of component (D) is preferably 0.1-8% by mass, more preferably 0.5-5% by mass, further preferably 1-3.5% by mass, further more preferably 1.5-3% by mass in the total composition.

[0087] In the present invention, the content of water in component (E) is preferably 10% by mass or more, more preferably 15% by mass or more, and further preferably 20% by mass or more, and preferably 85% by mass or less, more preferably 75% by mass or less, and further preferably 70% by mass or less in terms of forming a stable water-in-oil emulsion composition and improving the moisturizing feeling of the skin after application. In addition, the content of water in component (E) is preferably 10 to 85% by mass, more preferably 15 to 75% by mass, and further preferably 20 to 70% by mass in the total composition.

[0088] The cosmetic of the present invention preferably further contains a polyol, which can enhance the moisturizing feeling of the skin after application and enhance the duration of the moisturizing feeling of the skin after application.

[0089] The polyol is a compound having two or more hydroxyl groups in the molecule, and any polyol may be used as long as it is generally used in cosmetics.

[0090] Examples of dihydric alcohols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1,3-butylene glycol, propanediol, etc. Examples of trihydric alcohols include glycerol, trimethylolpropane, etc. Examples of tetrahydric alcohols include diglycerol, erythritol, etc. Examples of pentavalent or higher polyhydric alcohols include polyglycerols such as triglycerol, and sugars and sugar alcohols such as glucose, maltose, reduced maltose, sucrose, xylitol, sorbitol, maltitol, polyoxyethylene methyl glucoside, polyoxyethylene ethyl glucoside, and polyoxyethylene propylene glucoside.

[0091] As the polyol, from the viewpoint of enhancing the moisturizing feeling of the skin after application and enhancing the sustainability of the moisturizing feeling of the skin after application, it is preferred that the polyol contains at least one or two or more selected from diols, triols, tetraols and sugar alcohols, more preferably at least one or two or more selected from diols, triols and tetraols, further preferably at least one or two or more selected from propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerol and diglycerol, further more preferably at least one or two or more selected from dipropylene glycol, 1,3-butylene glycol and glycerol, further more preferably at least glycerol.

[0092] The polyol may be used alone or in combination of two or more, and the total content thereof is preferably 1% by mass or more, more preferably 5% by mass or more, and further preferably 10% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, and further preferably 15% by mass or less in the total composition from the viewpoint of improving the moisturizing feeling of the skin after application and improving the sustainability of the moisturizing feeling of the skin after application. In addition, the content of the polyol is preferably 1 to 30% by mass, more preferably 5 to 20% by mass, and further preferably 10 to 15% by mass in the total composition.

[0093] The emulsified composition of the present invention preferably further contains an anionic surfactant, which can form a stable oil-in-water emulsified composition, improve the moisturizing feeling of the skin after application, and improve the sustainability of the moisturizing feeling of the skin after application.

[0094] As the anionic surfactant, any one generally used in an emulsified composition may be used, and examples thereof include: N-acylated amino acids such as N-lauroyl-L-glutamic acid, N-stearoyl-L-glutamic acid, and N-myristoyl-L-glutamic acid, and N-acylated amino acids such as N-acylglutamic acids and salts thereof; N-myristoyl-N-methyltaurine, N-lauroyl-N-methyltaurine, N-stearoyl-N-methyltaurine, and N-acylmethyltaurine and salts thereof; fatty acids and salts thereof, and the like.

[0095] As the anionic surfactant, from the viewpoint of forming a stable oil-in-water emulsion composition, improving the moist feeling of the skin after application, and improving the sustainability of the moist feeling of the skin after application, it is preferred that the anionic surfactant contains one or more selected from N-acylglutamic acid and its salts, N-acylmethyltaurine and its salts, more preferably contains one or more selected from N-stearoyl-L-glutamic acid and its salts, N-stearoyl-N-methyltaurine and its salts, and further preferably contains one or more selected from sodium N-stearoyl-L-glutamate and sodium N-stearoyl-N-methyltaurate.

[0096] The anionic surfactant can be used in one or in combination of two or more, and its total content is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and more preferably 0.5% by mass or more, preferably 5% by mass or less, more preferably 3% by mass or less, and more preferably 1% by mass or less in the total composition from the viewpoint of forming a stable oil-in-water emulsion composition, improving the moisturizing feeling of the skin after application, and improving the sustainability of the moisturizing feeling of the skin after application. In addition, the content of the anionic surfactant is preferably 0.1 to 5% by mass, more preferably 0.3 to 3% by mass, and more preferably 0.5 to 1% by mass in the total composition.

[0097] The emulsified composition of the present invention may contain, in addition to the above-mentioned components, components commonly used in external preparations, perfumes and cosmetics, for example: oily components other than components (A), (B) and (C), surfactants other than component (D) and anionic surfactants, powders, UV blockers other than powders, polymer compounds, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, bactericides, skin activators, moisturizers other than polyols, cooling agents, whitening agents, anti-wrinkle agents, anti-inflammatory agents, steroid agents, immunosuppressants, active ingredients of pharmaceuticals or quasi-drugs such as molecular targeted drugs, etc.

[0098] In the emulsified composition of the present invention, the powder insoluble in the emulsified composition, specifically, the coloring pigment, the inorganic powder generally used as the ultraviolet scattering agent, the organic-inorganic composite powder, the surface-modified inorganic / organic powder, is preferably 30% by mass or less, more preferably 20% by mass or less, further preferably 10% by mass or less, further more preferably 5% by mass or less, and further more preferably substantially not contained in the total composition from the viewpoint of improving the ease of application and spreading, improving the persistence of the skin's moist feeling after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity. In addition, for ultraviolet blocking agents other than powders, it is preferably 20% by mass or less, more preferably 15% by mass or less, further preferably 10% by mass or less, further more preferably 5% by mass or less, and further more preferably substantially not contained in the total composition from the viewpoint of improving the ease of application and spreading, improving the persistence of the skin's moist feeling after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity.

[0099] The emulsified composition of the present invention can be produced by a common method.

[0100] The emulsion composition of the present invention may be any of a water-in-oil type emulsion composition and an oil-in-water type emulsion composition, but is preferably a water-in-oil type emulsion composition from the viewpoint of maintaining water resistance due to sweat in summer and improving the durability of the moisturizing feeling after application.

[0101] The emulsified composition of the present invention can stably contain high melting point oily components such as ceramides, and the skin after application can maintain a moist and hydrated feeling, and the moisturizing feeling can be reduced even in a hot and humid environment, thereby reducing the burden on the skin.

[0102] Furthermore, in addition to the above effects, an emulsified composition can be obtained that has a glossy appearance, provides a smooth feel that allows easy spread when applied to the skin, and ensures high temperature stability of the preparation that can withstand use at high temperatures.

[0103] The emulsified composition of the present invention can be used as a cosmetic or a skin external preparation, and is preferably used as a cosmetic. As the dosage form of the emulsified composition of the present invention, creams, lotions, etc. can be listed, and from the viewpoint of improving the effect of the present invention, creams are preferred. As cosmetics, specifically, skin care lotions, skin care creams, BB creams, BB lotions, beauty serums, hand creams, lip care products, sunscreens, etc. for the skin of the face or body can be made; hair styling agents, hair conditioners, etc. for the hair. Among these, from the viewpoint of fully exerting the effect of the present invention, skin care lotions, skin care creams, BB creams, BB lotions, beauty serums, hand creams, lip care products for the skin of the face or body are preferred, and skin care creams are more preferred.

[0104] In addition, by containing an ultraviolet scattering agent or an ultraviolet blocking agent in the emulsified composition of the present invention, a sunscreen can be prepared. From the viewpoints of improving the ease of application and spread, improving the moisturizing feeling of the skin after application, improving the sustainability of the moisturizing feeling of the skin after application, and reducing the burden on the skin by reducing the heat sensation under high temperature and high humidity, it is preferably prepared as a cosmetic other than a sunscreen.

[0105] In relation to the above-mentioned embodiment, the present invention further discloses the following composition and the like.

[0106] <1> An emulsified composition comprising the following components (A), (B), (C), (D), and (E):

[0107] (A) Oily component with a melting point of 50 to 150°C: 0.1 to 20% by mass,

[0108] (B) octamethyltrisiloxane: 1 to 30% by mass,

[0109] (C) α-olefin oligomer: 1 to 20% by mass,

[0110] (D) nonionic surfactants,

[0111] (E) Water.

[0112] <2> The emulsified composition according to <1> above, wherein component (A) is preferably selected from ceramides (particularly natural ceramides, sphingosines, compounds of the general formulae (1) and (2)), C 16 -C 22 Fatty acids, C 16 -C 22 One or more kinds selected from higher alcohols, preferably ceramides and C 16 -C 22 One or more selected from higher alcohols, more preferably containing ceramides, further preferably containing one or more compounds selected from general formula (1) and general formula (2), further preferably containing a compound of general formula (1), and most preferably containing N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanoic acid amide.

[0113]

[0114] [Where R 1 represents a hydrocarbon group having 10 to 26 carbon atoms, R 2 represents a hydrocarbon group having 9 to 25 carbon atoms, and X represents -(CH2) n -(wherein n represents an integer from 2 to 6). ]

[0115]

[0116] (Where R 3 and R 4 are the same or different and represent a hydrocarbon group having 1 to 40 carbon atoms which may be hydroxylated, R 5 represents an alkylene group having 1 to 6 carbon atoms or a single bond, R 6 represents a hydrogen atom, an alkoxy group having 1 to 12 carbon atoms, or a 2,3-dihydroxypropoxy group. 5 When it is a single bond, R 6 is a hydrogen atom.)

[0117] <3> The emulsified composition according to <1> or <2> above, wherein component (A) is preferably selected from ceramides (particularly natural ceramides, sphingosines, compounds of the general formula (1) and (2)), C 16 -C 22 Fatty acids, C 16 -C 22 One or more selected from higher alcohols, more preferably ceramides and C 16 -C 22One or more selected from higher alcohols are more preferably ceramides, more preferably one or more compounds selected from the general formula (1) and the general formula (2), more preferably the compound of the general formula (1), and most preferably N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanoic acid amide.

[0118] <4> The emulsified composition according to any one of <1> to <3> above, wherein component (A) contains ceramides, C 16 -C 22 Fatty acids, C 16 -C 22 In the case of one or more selected from the higher alcohols, the ceramides, C 16 -C 22 Fatty acids, C 16 -C 22 The total content of the higher alcohols in component (A) is preferably 20 to 100 mass %, more preferably 30 to 100 mass %, further preferably 50 to 100 mass %, further more preferably 75 to 100 mass %, further more preferably 85 to 100 mass %, and most preferably substantially 100 mass %.

[0119] <5> The emulsion composition according to any one of <1> to <4> above, wherein, when component (A) contains ceramides, the content ratio of ceramides in component (A) is preferably 20 to 100% by mass, more preferably 30 to 100% by mass, further preferably 50 to 100% by mass, further more preferably 75 to 100% by mass, further more preferably 85 to 100% by mass, and most preferably substantially 100% by mass.

[0120] <6> An emulsified composition as described in any one of <1> to <5> above, wherein, when component (A) contains one or more compounds selected from the general formula (1) and the general formula (2), the content ratio of the one or more compounds selected from the general formula (1) and the general formula (2) in component (A) is preferably 20 to 100 mass %, more preferably 30 to 100 mass %, further preferably 50 to 100 mass %, further more preferably 75 to 100 mass %, further more preferably 85 to 100 mass %, and most preferably substantially 100 mass %.

[0121] <7> The emulsified composition as described in any one of <1> to <6> above, wherein, when component (A) contains N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecylamide, the content ratio of N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecylamide in component (A) is preferably 20 to 100% by mass, more preferably 30 to 100% by mass, further preferably 50 to 100% by mass, further more preferably 75 to 100% by mass, further more preferably 85 to 100% by mass, and most preferably substantially 100% by mass.

[0122] <8> The emulsified composition according to any one of <1> to <7> above, wherein component (A) contains ceramides and C 16 -C 22 Fatty acids, C 16 -C 22 In the case of higher alcohols, the ceramides and C 16 -C 22 Fatty acids, C 16 -C 22 Of the total amount of higher alcohols, C 16 -C 22 Fatty acids, C 16 -C 22 The total content of the higher alcohols is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0123] <9> The emulsified composition according to any one of <1> to <8> above, wherein component (A) contains ceramides and C 16 -C 22 In the case of fatty acids, the ceramides in component (A) and C 16 -C 22 Of the total amount of fatty acids, C 16 -C 22 The total content of fatty acids is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0124] <10> The emulsified composition according to any one of <1> to <9> above, wherein component (A) contains ceramides and C 16 -C 22 In the case of higher alcohols, the ceramides in component (A) and C 16 -C 22Of the total amount of higher alcohols, C 16 -C 22 The total content of the higher alcohols is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0125] <11> The emulsified composition according to any one of <1> to <10> above, wherein component (A) contains N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide and C 16 -C 22 Fatty acids, C 16 -C 22 In the case of a higher alcohol, N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide and C 16 -C 22 Fatty acids, C 16 -C 22 Of the total amount of higher alcohols, C 16 -C 22 Fatty acids, C 16 -C 22 The total content of the higher alcohols is preferably 90% by mass or less, more preferably 70% by mass or less, further preferably 50% by mass or less, further more preferably 25% by mass or less, further more preferably 10% by mass or less, and most preferably substantially 0% by mass.

[0126] <12> The emulsified composition according to any one of <1> to <11> above, wherein the content of component (A) is preferably 2% by mass or more, more preferably 5% by mass or more, and preferably 15% by mass or less, more preferably 9% by mass or less, in the total composition.

[0127] <13> An emulsified composition as described in any one of <1> to <12> above, wherein the content of component (B) is preferably 1.5% by mass or more, more preferably 2% by mass or more, further preferably 5% by mass or more, and is preferably 20% by mass or less, more preferably 13% by mass or less, further preferably 8.5% by mass or less in the total composition.

[0128] <14> The emulsion composition as described in any one of <1> to <13> above, wherein the molecular weight of the α-olefin oligomer of component (C) is preferably 300 or more, more preferably 330 or more, further preferably 360 or more, further more preferably 400 or more, and is preferably 800 or less, more preferably 700 or less, further preferably 600 or less, further more preferably 500 or less.

[0129] <15> An emulsion composition as described in any one of <1> to <14> above, wherein the viscosity of the α-olefin oligomer of component (C) at 25°C is preferably 5 mPa·s or more, more preferably 8 mPa·s or more, further preferably 12 mPa·s or more, further more preferably 15 mPa·s or more, and is preferably 50 mPa·s or less, more preferably 45 mPa·s or less, further preferably 30 mPa·s or less, further more preferably 25 mPa·s or less.

[0130] <16> An emulsion composition as described in any one of <1> to <15> above, wherein the olefin portion of the α-olefin oligomer of component (C) is obtained by polymerizing and hydrogenating a linear aliphatic α-olefin having 4 to 12 carbon atoms, preferably a linear aliphatic α-olefin having 6 to 12 carbon atoms, more preferably a linear aliphatic α-olefin having 8 to 12 carbon atoms, and even more preferably a linear aliphatic α-olefin having 10 carbon atoms.

[0131] <17> The emulsion composition according to any one of <1> to <16> above, wherein the α-olefin oligomer of component (C) is obtained by polymerizing a linear aliphatic α-olefin having 4 to 12 carbon atoms, and the degree of polymerization is preferably 3 to 6, more preferably 3 to 4.

[0132] <18> The emulsified composition according to <17> above, wherein the constituent ratio of component (C) having a degree of polymerization of 3 to 4 is preferably 50% by mass or more, more preferably 65% ​​by mass or more, further preferably 80% by mass or more, further preferably substantially 100% by mass in component (C).

[0133] <19> The emulsion composition as described in <17> or <18> above, wherein the constituent ratio of component (C) having a degree of polymerization of 5 or more is preferably less than 50% by mass, more preferably less than 35% by mass, further preferably less than 20% by mass, and further more preferably substantially not contained in component (C).

[0134] <20> The emulsified composition according to any one of <1> to <19> above, wherein the content of component (C) is preferably 2% by mass or more, more preferably 4% by mass or more, and is preferably 3% by mass or less, more preferably 8% by mass or less in the total composition.

[0135] <21> An emulsion composition as described in any one of <1> to <20> above, wherein the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.1 or more, more preferably 0.38 or more, further preferably 0.6 or more, further preferably 1 or more, further more preferably 1.08 or more, and is preferably 10 or less, more preferably 5 or less, further preferably 3.3 or less, further more preferably 1.9 or less, further more preferably 1.4 or less.

[0136] <22> An emulsion composition as described in any one of <1> to <21> above, wherein the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.1 or more, more preferably 0.4 or more, further preferably 0.67 or more, further more preferably 1.1 or more, and is preferably 10 or less, more preferably 5 or less, further preferably 3.3 or less, further more preferably 2.1 or less.

[0137] <23> The emulsified composition according to any one of <1> to <22> above, wherein the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.1 or more, more preferably 0.48 or more, further preferably 0.6 or more, further more preferably 0.8 or more, further more preferably 0.93 or more, and is preferably 10 or less, more preferably 5 or less, further preferably 3.3 or less, further more preferably 1.8 or less, further more preferably 1.47 or less.

[0138] <24> An emulsion composition as described in any one of <1> to <23> above, wherein component (D) is preferably at least one or two or more selected from silicone surfactants, polyoxyethylene hydrogenated castor oil, alkyl glyceryl ethers, and sorbitan fatty acid esters, more preferably at least one or two or more selected from silicone surfactants, polyoxyethylene hydrogenated castor oil, and alkyl glyceryl ethers, and further preferably at least one or two or more selected from alkyl glyceryl ethers and silicone surfactants.

[0139] <25> The emulsion composition according to any one of <1> to <24>, wherein component (D) is preferably a silicone surfactant, more preferably at least one or two or more selected from polyether-modified silicone, polyglycerol-modified silicone, polyether·alkyl co-modified silicone, and polyglycerol·alkyl co-modified silicone, further preferably at least one or two or more selected from polyether-modified silicone and polyether·alkyl co-modified silicone, further more preferably polyether-modified silicone, further more preferably a polyether-modified silicone having a linear silicone chain as the main chain, further more preferably at least one or two or more selected from PEG-3 polydimethylsiloxane, PEG-10 polydimethylsiloxane, and PEG-12 polydimethylsiloxane, further more preferably at least one or more selected from PEG-3 polydimethylsiloxane and PEG-12 polydimethylsiloxane.

[0140] <26> An emulsion composition as described in any one of <1> to <25> above, wherein component (D) preferably contains both an alkyl glyceryl ether and a silicone surfactant, more preferably contains isostearyl glyceryl ether and a polyether-modified silicone, further preferably contains isostearyl glyceryl ether and one or more selected from PEG-3 dimethicone, PEG-10 dimethicone, and PEG-12 dimethicone, further preferably contains isostearyl glyceryl ether and one or more selected from PEG-3 dimethicone and PEG-12 dimethicone, further more preferably contains isostearyl glyceryl ether and PEG-3 dimethicone and PEG-12 dimethicone, further more preferably contains isostearyl glyceryl ether and PEG-3 dimethicone.

[0141] <27> The emulsion composition according to any one of <1> to <26> above, wherein the nonionic surfactant of component (D) has an HLB value of preferably 1 to 7, more preferably 1 to 6, and even more preferably 2 to 6 when the emulsion composition is a water-in-oil emulsion composition.

[0142] <28> The emulsified composition according to any one of <1> to <27>, wherein the component (D) preferably contains a silicone surfactant having an HLB of 1 to 7.

[0143] <29> The emulsion composition according to any one of <1> to <26> above, wherein the nonionic surfactant of component (D) has an HLB value of preferably 8 to 18, more preferably 8 to 16, and even more preferably 8 to 14 when the emulsion composition is an oil-in-water emulsion composition.

[0144] <30> An emulsion composition as described in any one of <1> to <29> above, wherein the content of the nonionic surfactant of component (D) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, further preferably 1% by mass or more, further more preferably 1.5% by mass or more, and is preferably 8% by mass or less, more preferably 5% by mass or less, further preferably 3.5% by mass or less, further more preferably 3% by mass or less, in the total composition.

[0145] <31> An emulsified composition as described in any one of <1> to <30> above, wherein the content of water as component (E) is preferably 10% by mass or more, more preferably 15% by mass or more, further preferably 20% by mass or more, and is preferably 85% by mass or less, more preferably 75% by mass or less, further preferably 70% by mass or less in the total composition.

[0146] <32> The emulsified composition according to any one of <1> to <31>, preferably further comprising a polyol.

[0147] <33> The emulsion composition as described in <32> above, wherein the polyol preferably contains at least one or two or more selected from diols, triols, tetraols and sugar alcohols, more preferably contains at least one or two or more selected from diols, triols and tetraols, further preferably contains at least one or two or more selected from propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerol and diglycerol, further more preferably contains at least one or two or more selected from dipropylene glycol, 1,3-butylene glycol and glycerol, and further more preferably contains at least glycerol.

[0148] <34> An emulsified composition as described in <32> or <33> above, wherein the content of the polyol is preferably 1% by mass or more, more preferably 5% by mass or more, further preferably 10% by mass or more, and is preferably 30% by mass or less, more preferably 20% by mass or less, further preferably 15% by mass or less in the total composition.

[0149] <35> The emulsified composition according to any one of <1> to <34>, preferably further comprising an anionic surfactant.

[0150] <36> The emulsified composition as described in <35> above, wherein the anionic surfactant is preferably one or more selected from N-acylglutamic acid and its salts, N-acylmethyltaurine and its salts, more preferably one or more selected from N-stearoyl-L-glutamic acid and its salts, N-stearoyl-N-methyltaurine and its salts, and further preferably contains one or more selected from sodium N-stearoyl-L-glutamate and sodium N-stearoyl-N-methyltaurate.

[0151] <37> An emulsified composition as described in <35> or <36> above, wherein the content of the anionic surfactant is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, further preferably 0.5% by mass or more, and is preferably 5% by mass or less, more preferably 3% by mass or less, further preferably 1% by mass or less in the total composition.

[0152] <38> An emulsified composition as described in any one of <1> to <37> above, wherein the content of powder insoluble in the emulsified composition is preferably 30% by mass or less, more preferably 20% by mass or less, further preferably 10% by mass or less, further more preferably 5% by mass or less, and further more preferably substantially free of powder in the total composition.

[0153] <39> An emulsified composition as described in any one of <1> to <38> above, wherein the content of the ultraviolet radiation agent other than the powder is preferably 20% by mass or less, more preferably 15% by mass or less, further preferably 10% by mass or less, further more preferably 5% by mass or less, and further more preferably substantially free of the ultraviolet radiation agent.

[0154] <40> The emulsified composition according to any one of <1> to <39> above, wherein the emulsified composition is preferably a water-in-oil emulsified composition.

[0155] <41> The emulsified composition according to any one of <1> to <39> above, wherein the emulsified composition is preferably an oil-in-water emulsified composition.

[0156] <42> The emulsified composition according to any one of <1> to <41> above, wherein the emulsified composition is preferably an emulsified cosmetic.

[0157] <43> The emulsified composition according to any one of <1> to <42> above, wherein the emulsified composition is preferably in the form of a cream, and more preferably a skin care cream.

[0158] Example

[0159] Examples 1 to 20 and Comparative Examples 1 to 4

[0160] Water-in-oil emulsified cosmetics of the compositions shown in Tables 1 to 3 were prepared and evaluated for glossiness, ease of application and spread, moisturizing feeling of the skin after application, duration of moisturizing feeling, thermal sensation, and stability. The results are collectively recorded in Tables 1 to 3.

[0161] In addition, since Comparative Examples 1 and 3 separated immediately after production, they could not be evaluated and were recorded as “cannot be evaluated.” The stability evaluation also separated immediately after production and was rated as “B.”

[0162] (Preparation method)

[0163] The components (A) to (D) and other oily components were heated and dissolved at 85°C to obtain an oil phase mixture. The component (E) and other aqueous components were heated and dissolved at 85°C to obtain an aqueous phase mixture. The aqueous phase mixture was added to the oil phase mixture while stirring at 85°C, and then cooled to 25°C while stirring to obtain a water-in-oil emulsified cosmetic.

[0164] (Evaluation method)

[0165] (1) Glossiness of emulsified cosmetics:

[0166] Four professional evaluators visually observed the surface of the emulsified cosmetics filled in a transparent glass bottle (wide-mouthed bottle No. 4, manufactured by AS-ONE Corporation) from above the transparent glass bottle in a bright space and evaluated it according to the following criteria. The results are expressed as the total score of the four professional evaluators. In addition, the emulsified cosmetics have a glossy appearance and a high-end feel.

[0167] 4: Extremely glossy.

[0168] 3: Glossy.

[0169] 2: Not too shiny.

[0170] 1: No glossiness.

[0171] (2) Ease of application and extension:

[0172] Four professional panelists applied about 0.2 g of each emulsified cosmetic to the forearm of the arm that had been cleaned with a cleanser (Curel facial cleanser, manufactured by Kao Corporation) at 25°C, and evaluated the ease of application and spread during application according to the following criteria. The results are expressed as the total score of the four professional panelists.

[0173] In addition, easy application and spreading means that the product is applied and spreads smoothly.

[0174] 4: It is very easy to apply and spread.

[0175] 3: Easy to apply and spread.

[0176] 2: It is not easy to apply and spread.

[0177] 1: It is obviously not easy to apply and spread.

[0178] (3) Moisturizing feeling of the skin after application:

[0179] Four professional panelists applied about 0.2 g of each emulsified cosmetic to the forearm of the arm that had been cleaned with a cleanser (Curel facial cleanser, manufactured by Kao Corporation) at 25°C, and evaluated the moisturizing feeling of the skin after application according to the following criteria. The results are expressed as the total score of the four professional panelists.

[0180] In addition, the skin feels nourished and moisturized.

[0181] 4: Skin feels extremely moisturized.

[0182] 3: Skin feels moisturized.

[0183] 2: The skin does not feel very moisturized.

[0184] 1: The skin does not feel moisturized.

[0185] (4) Sustained moisturizing effect:

[0186] Four professional panelists applied about 0.2 g of each emulsified cosmetic to the forearm cleansed with a cleanser (Curel facial cleanser, manufactured by Kao Corporation) at 25°C, and evaluated the moisturizing feeling of the skin after 1 hour according to the following criteria. The results are expressed as the total score of the four professional panelists.

[0187] 4: There is no difference in moisturizing feeling compared to right after application.

[0188] 3: The moisturizing feeling is slightly less than that immediately after application.

[0189] 2: The moisturizing feeling is less than that immediately after application.

[0190] 1: No moisturizing feeling.

[0191] (5) Heat sensation:

[0192] Four professional evaluators applied about 0.2g of each emulsified cosmetic to the forearm of the arm that had been cleaned with a cleanser (Curel facial cleanser, manufactured by Kao Corporation), and then placed in a high temperature and high humidity environment (temperature 40°C and humidity 75%). After acclimatization for 10 minutes, the degree of burden on the skin caused by the heat was evaluated according to the following criteria. The results are expressed as the total score of the four professional evaluators.

[0193] In addition, heat sensation refers to the feeling of stuffiness that occurs when the skin is exposed to high temperature and high humidity above a certain level when emulsified cosmetics are applied to the skin. If the heat sensation is reduced, the burden on the skin is also reduced.

[0194] 4: No stuffy or burning heat sensation.

[0195] 3: Rarely, you can feel a stuffy and burning heat sensation.

[0196] 2: Feeling of stuffy and burning heat.

[0197] 1: A strong feeling of stuffy and burning heat.

[0198] (6) Stability (appearance after storage at 25°C for 1 day):

[0199] Each emulsified cosmetic was filled in a transparent glass bottle (wide-mouthed bottle No. 4, manufactured by AS-ONE Corporation), and after being stored at 25° C. for 1 day, the appearance was visually evaluated from above or from the side of the transparent glass bottle.

[0200] A: There is no separation.

[0201] B: There is separation.

[0202] (7) Stability (appearance after storage at 30°C for 3 days):

[0203] Each emulsified cosmetic was filled in a transparent glass bottle (wide-mouthed bottle No. 4, manufactured by AS-ONE Corporation), and after being stored at 30° C. for 3 days, the appearance was visually evaluated from above or from the side of the transparent glass bottle.

[0204] A: There is no separation.

[0205] B: There is separation.

[0206] (8) Stability (appearance after storage at 50°C for 3 days):

[0207] Each emulsified cosmetic was filled in a transparent glass bottle (wide-mouthed bottle No. 4, manufactured by AS-ONE Corporation), and after being stored at 50° C. for 3 days, the appearance was visually evaluated from above or from the side of the transparent glass bottle.

[0208] A: There is no separation.

[0209] B: There is separation.

[0210]

[0211] [Table 2]

[0212]

[0213] [Table 3]

[0214]

[0215] *1: Allantoin (INCI name: Allantoin): manufactured by Kawaken Fine Chemicals Co., Ltd., S-allantoin

[0216] *2: N-(Hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide (INCI name: Cetyl-PG Hydroxyethyl Palmitamide): Made by Kao Corporation, SOFCARE CERAMIDE SL-E

[0217] *3: Isostearyl Glyceryl Ether (INCI name: Isostearyl Glyceryl Ether): Made by Kao Corporation, PENETOL GE-IS

[0218] *4: PEG-3 Dimethicone (INCI name: PEG-3 Dimethicone): Made by Shin-Etsu Chemical Co., Ltd., SILICONE KF-6015(-G)

[0219] *5: PEG-12 Dimethicone (INCI name: PEG-12 Dimethicone): Dow Silicone Corporation, DOWSIL SH 3775M FLUID (-G)

[0220] *6: Hydrogenated Polydecene (INCI name: Hydrogenated Polydecene): Vantage Specialty Chemicals, SILKFLO 364

[0221] *7: Trisiloxane (INCI name: Trisiloxane): Made by Shin-Etsu Chemical Co., Ltd., SILICONE KF-96A-1CS(-G)

[0222] *8: Polydimethylsiloxane (2CS) (INCI name: Dimethicone): Made by Shin-Etsu Chemical Co., Ltd., SILICONE KF-96L-2CS(-G)

[0223] *9: Polydimethylsiloxane (6CS) (INCI name: Dimethicone): Made by Shin-Etsu Chemical Co., Ltd., SILICONE KF-96A-6CS(-G)

[0224] *10: Mg sulfate (INCI name: Magnesium Sulfate): Magnesium Sulfate Grade 1, manufactured by Magnesium Chemical Industry Co., Ltd.

[0225] *11: Glycerin (86%) (INCI name: Glycerin): Made by Kao Corporation, 86% Glycerin V (a mixture of 86% glycerin and 14% water)

[0226] *12: Eucalyptus Globulus Leaf Extract (INCI name: Eucalyptus Globulus Leaf Extract): Made by Tochimoto Tenkaido Co., Ltd., Eucalyptus Extract Liquid EBL

[0227] *13: Methylparaben (INCI name: Methylparaben): manufactured by Ueno Pharmaceutical Co., Ltd., MEKKINS-M (methyl parahydroxybenzoate)

[0228] *14: Succinic acid (INCI name: Succinic Acid): Made by Nippon Shokubai Co., Ltd., Succinic acid

[0229] *15: Sodium hydroxide (48%) (INCI name: Sodium Hydroxide): Made by Nankai Chemical Co., Ltd., 48% caustic soda (edible) (for external use)

[0230] *16: Stearyl Alcohol (INCI name: Stearyl Alcohol): Made by Kao Corporation, KALCOL 8098

[0231] *17: Ceramide NG (INCI name: Ceramide NG): Made by Croda Japan KK, Ceramide 2

[0232] *18: PEG-10 Hydrogenated Castor Oil (INCI name: PEG-10 Hydrogenated Castor Oil): Made by NIPPON SURFACTANT INDUSTRIES CO., LTD., NIKKOL HCO-10

[0233] *19: Hydrogenated Polydecene (INCI name: Hydrogenated Polydecene): Vantage Specialty Chemicals, SILKFLO 366

[0234] *20: Hydrogenated polyisobutene (INCI name: Hydrogenated Polyisobutene): Made by NOF Corporation, PARLEAM EX

Claims

1. An emulsified composition, wherein Contains the following ingredients (A), (B), (C), (D) and (E): (A) From ceramides, C 16 -C 22 One or more oily components selected from higher alcohols: 1-15% by mass (B) Octamethyltrisiloxane: 2-20% by mass, (C) an α-olefin oligomer obtained by polymerizing and hydrogenating a linear aliphatic α-olefin having 8 to 12 carbon atoms, wherein the degree of polymerization is 3 to 6: 2 to 20% by mass, (D) Nonionic surfactant containing silicone surfactant with HLB 1 to 7: 1.5 to 5% by mass (E) Water: 10-85% by mass The mass ratio (A) / (B) of component (A) to component (B) is 0.1 to 5, the mass ratio (A) / (C) of component (A) to component (C) is 0.1 to 5, and the mass ratio (B) / (C) of component (B) to component (C) is 0.1 to 5.

2. The emulsified composition according to claim 1, wherein Ingredient (A) contains ceramides.

3. The emulsified composition according to claim 1 or 2, wherein Component (A) contains N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl palmitamide.

4. The emulsified composition according to claim 1 or 2, wherein Component (D) contains polyether-modified silicone.

5. The emulsified composition according to claim 1 or 2, wherein The silicone surfactant of HLB 1-7 contains one or two selected from PEG-3 polydimethylsiloxane and PEG-12 polydimethylsiloxane.

6. The emulsified composition according to claim 1 or 2, wherein The silicone surfactant of HLB 1-7 is one or two selected from PEG-3 polydimethylsiloxane and PEG-12 polydimethylsiloxane, and the component (D) nonionic surfactant further contains isostearyl glyceryl ether.

7. The emulsified composition according to claim 1 or 2, wherein The emulsified composition is a water-in-oil emulsified composition.

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