Water-in-oil emulsion composition

Abstract

Provided is a water-in-oil type emulsion composition which has a coating film that has high water-retaining properties, and which has a good skin-protecting feeling and a good luster feeling. The water-in-oil emulsion composition contains the following components (A), (B), (C), (D), (E) and (F): (A) 1-30 mass% of an oily component having a melting point of 50-150 DEG C; (B) from 0.5% by mass to 8% by mass (inclusive) of a polyglycerol fatty acid ester; (C) a lipophilic surfactant other than component (B) having an HLB of 2-6; (D) 0.15% by mass or more and 8% by mass or less of a dextrin fatty acid ester having 8-22 carbon atoms in the fatty acid moiety; (E) a hydrocarbon oil that is liquid at 25 DEG C; and (F) water.

Description

[0001] This case is a divisional application of a patent application with an application date of May 30, 2018 and an application number of 201880035727.X (PCT / JP2018 / 020797) and an invention title of Water-in-oil emulsion composition . Technical Field

[0002] The present invention relates to a water-in-oil emulsion composition. Background Art

[0003] Emulsion compositions used as skin cosmetics and quasi-drugs are roughly classified into water-in-oil emulsion compositions and oil-in-water emulsion compositions. Among them, water-in-oil emulsion compositions have excellent moisturizing properties because the outer phase is an oil phase, but there are problems in terms of usability such as stickiness.

[0004] There are reports that: in order to improve the usability of water-in-oil emulsion compositions, a technique of blending a specific gelling agent and polyglycerol fatty acid ester and / or polyoxyethylene hydrogenated castor oil as an emulsifier (Patent Document 1). In addition, there are reports that: a technique of blending ceramides, which are oily components having a skin barrier function and are solid at normal temperature, at a high concentration, and blending phytosterol derivatives and dextrin fatty acid esters in order to obtain a good stability of the external composition (Patent Document 2); there are also reports that: a technique of blending ceramides, organically modified clay minerals, diesters of N-acylglutamic acid, and phytosterols (Patent Document 3).

[0005] (Patent Document 1) WO 99 / 25310

[0006] (Patent Document 2) Japanese Patent Application Laid-Open No. 2016-190816

[0007] (Patent Document 3) Japanese Patent Application Laid-Open No. 2010-513221 Summary of the Invention

[0008] The present invention provides a water-in-oil emulsion composition containing the following components (A), (B), (C), (D), (E), and (F):

[0009] (A) An oily component having a melting point of 50 to 150°C: 1% by mass or more and 30% by mass or less;

[0010] (B) Polyglycerol fatty acid ester: 0.5% by mass or more and 8% by mass or less;

[0011] (C) A lipophilic surfactant having an HLB of 2 to 6 other than component (B);

[0012] (D) Dextrin fatty acid ester having 8 to 22 carbon atoms in the fatty acid moiety: 0.15% by mass or more and 8% by mass or less;

[0013] (E) Hydrocarbon oil that is liquid at 25°C;

[0014] (F) Water. Detailed implementation mode

[0015] According to the technologies of Patent Documents 1 to 3, the film of the coated preparation does not fully exhibit water-locking property, and in terms of the protective feeling, gloss feeling when coated on the skin, and the good usability that can be imparted to the coated skin without stickiness and discomfort, it has not reached the degree to be satisfied.

[0016] Therefore, the present invention provides a water-in-oil emulsion composition containing an oily component that is solid at normal temperature, having excellent water-locking property, skin protection feeling, and gloss feeling, and capable of imparting a good usability without stickiness and discomfort to the coated skin.

[0017] Here, the present inventors incorporated various components into a water-in-oil emulsion composition containing an oily component that is solid at normal temperature, and studied its water-locking property, protective feeling, gloss feeling, etc. As a result, it was found that: if polyglyceryl fatty acid ester, a lipophilic surfactant with an HLB of 2 to 6, dextrin fatty acid ester, and a hydrocarbon oil that is liquid at 25°C are incorporated at a specific ratio, a water-in-oil emulsion composition can be obtained that not only has excellent water-locking property, but also has excellent skin protection feeling and gloss feeling, can impart a good usability without stickiness and discomfort to the coated skin, and also has good storage stability, thus completing the present invention.

[0018] The water-in-oil emulsion composition of the present invention has excellent water-locking property, i.e., a shielding function, and excellent skin protection feeling and gloss feeling, and can impart a good usability without stickiness and discomfort to the coated skin, and moreover, its emulsion system will not separate even after long-term storage and its stability is excellent. In addition, in the water-in-oil emulsion composition of the present invention, particularly when component (A) is ceramides, it was confirmed by microscopic observation whether the crystals in the preparation were refined or amorphous, and the high water-locking property of the film of the coated preparation is considered to be caused by this refinement or amorphization.

[0019] In the water-in-oil emulsion composition of the present invention, component (A) uses an oily component having a melting point of 50 to 150°C. The oily component having a melting point of 50 to 150°C is an oily component that is solid at normal temperature (5 to 35°C). Examples of such solid oily components include: ceramides, sphingolipids such as sphingosine (including natural products and synthetic products); sterols and their analog compounds such as cholesterol, dehydrocholesterol, β-sitosterol, stearyl cholesterol ester, isostearyl cholesterol ester, and vegetable oil fatty acid cholesterol ester; stearic acid, behenic acid, etc. C 16 -C 22Fatty acids; cetyl alcohol, stearyl alcohol, behenyl alcohol, batyl alcohol, selachyl alcohol and other C 16 -C 22 alcohols and their similar compounds, etc.

[0020] As ceramides, in addition to natural ceramides, sphingosine derivatives, etc., ceramides with similar structures described in JP-A-62-228048, JP-A-63-216812, JP-A-63-227513, JP-A-64-29347, JP-A-64-31752, JP-A-8-319263, etc. can also be exemplified. Specifically, from the viewpoints of skin coverage and imparting a glossy feeling to the skin, compounds selected from the following general formulas (1) and (2) are preferred, and compounds of general formula (1) are more preferred.

[0021]

[0022] [In the formula, R 1b represents a hydrocarbon group having 10 to 26 carbon atoms; R 2b represents a hydrocarbon group having 9 to 25 carbon atoms; X represents -(CH2) n -(wherein n represents an integer of 2 to 6).]

[0023]

[0024] (In the formula, R 1 and R 2 are the same or different and represent a hydroxylated hydrocarbon group having 1 to 40 carbon atoms; R 3 represents an alkylene group having 1 to 6 carbon atoms or a single bond; R 4 represents a hydrogen atom, an alkoxy group having 1 to 12 carbon atoms or 2,3-dihydroxypropoxy group. Among them, when R 3 is a single bond, R 4 is a hydrogen atom.)

[0025] In addition, in the above general formulas (1) and (2), as the hydrocarbon group, an alkyl group or an alkenyl group is preferred.

[0026] As an example of the compound of general formula (1), N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl hexadecanamide can be cited, and as an example of the compound of general formula (2), long-chain dibasic acid bis-3-methoxypropylamide can be cited.

[0027] From the viewpoints of water retention and skin protection, among these components (A), ceramides (especially natural ceramides, sphingosines, and compounds of the above general formulas (1) and (2)), C 16 -C 22 fatty acids, C16 -C 22 Alcohols, more preferably ceramides, still more preferably compounds selected from the above general formula (1) and the above general formula (2), and even more preferably the compound of the above general formula (1). These solid oily components can be used alone or in combination of two or more.

[0028] In the water-in-oil emulsion composition of the present invention, component (A) is contained in an amount of 1% by mass or more and 30% by mass or less. When the content of component (A) is within this range, sufficient water-locking property can be obtained, and the skin protection feeling is also good, and a good feeling in use without stickiness and discomfort can be given to the skin after coating. Further, from the same viewpoint, the content of component (A) is preferably 1.5% by mass or more, more preferably 2% by mass or more, still more preferably 3% by mass or more, and even more preferably 5% by mass or more. In addition, it is preferably 20% by mass or less, more preferably 18% by mass or less, still more preferably 16% by mass or less. As a specific range, it is preferably 1.5% by mass or more and 20% by mass or less, more preferably 2% by mass or more and 18% by mass or less, still more preferably 3% by mass or more and 18% by mass or less, and even more preferably 5% by mass or more and 16% by mass or less.

[0029] Component (B) is a polyglycerol fatty acid ester. As the polyglycerol fatty acid ester, the polyglycerol part is condensed from 2 to 20 glycerols. From the viewpoints of water-locking property, skin protection feeling, glossiness, storage stability, and a good feeling in use without stickiness and discomfort that can be given to the skin after coating, the fatty acid part is preferably C8-C 24 fatty acid. Among these polyglycerol fatty acid esters, from the viewpoints of water-locking property, skin protection feeling, glossiness, storage stability, and a good feeling in use without stickiness and discomfort that can be given to the skin after coating, polyglycerol difatty acid ester and polyglycerol trifatty acid ester are preferred, and polyglycerol difatty acid ester is more preferred. As the fatty acid part, it is preferably C 14 -C 22 fatty acid, more preferably C 16 -C 22 fatty acid, still more preferably oleic acid, isostearic acid, stearic acid, hydroxystearic acid, behenic acid, and even more preferably isostearic acid, stearic acid, and particularly preferably isostearic acid.

[0030] More specifically, polyglycerol di-C 16 -C 22 fatty acid ester and polyglycerol tri-C 16 -C 22 fatty acid ester are preferred, and polyglycerol diisostearate and polyglycerol triisostearate are more preferred, and polyglycerol diisostearate is still more preferred.

[0031] In addition, regarding the polyglycerol moiety of these polyglycerol fatty acid esters, from the viewpoints of water retention, skin protection, gloss, storage stability, and the ability to provide a good feeling of use without stickiness and discomfort to the skin after application, it is preferably composed of 2 to 12 condensed glycerols, more preferably composed of 2 to 10 condensed glycerols, further preferably composed of 2 to 3 condensed glycerols, and even more preferably composed of 2 condensed glycerols.

[0032] In the water-in-oil emulsion composition of the present invention, component (B) is contained in an amount of 0.5% by mass or more and 8% by mass or less. When the content of component (B) is within this range, sufficient water retention can be obtained, and both the skin protection and gloss are good. It can provide a good feeling of use without stickiness and discomfort to the skin after application, and the long-term storage stability is also excellent. In addition, from the same viewpoints, the content of component (B) is preferably 0.7% by mass or more, more preferably 0.8% by mass or more, further preferably 1% by mass or more. In addition, it is preferably 7% by mass or less, more preferably 6% by mass or less, further preferably 5% by mass or less, and even more preferably 3% by mass or less. As a specific range, it is preferably 0.7% by mass or more and 7% by mass or less, more preferably 0.8% by mass or more and 6% by mass or less, further preferably 1% by mass or more and 5% by mass or less, and even more preferably 1% by mass or more and 3% by mass or less.

[0033] Component (C) is a lipophilic surfactant other than component (B) with an HLB of 2 to 6. By using the two surfactants, component (B) and component (C), in the water-in-oil emulsion composition of the present invention, a composition can be obtained that maintains excellent water retention, has high skin protection, skin coverage, and gloss, has a good feeling without stickiness or discomfort, and also has good long-term storage stability.

[0034] As a lipophilic surfactant with an HLB of 2 to 6, a nonionic surfactant with an HLB in the range of 2 to 6 is preferred. Examples include glycerol fatty acid esters, propylene glycol fatty acid esters, sorbitan fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyethylene glycol fatty acid esters, alkyl glycerol ethers, alkyl polyglycerol ethers, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ether fatty acid esters, polyoxyethylene alkyl amines, silicone-based surfactants, etc. As silicone-based surfactants, polyether-modified silicones, polyether-alkyl co-modified silicones, polyglycerol-modified silicones, polyglycerol-alkyl co-modified silicones, alkyl-polyether modified silicones, alkyl silicone dendritic polyether modified silicones, etc. can be cited. In addition, for these, examples of the straight-chain type, branched-chain type, and crosslinked type of the silicone chain can be cited respectively, and these can use commercially available products sold by Shin-Etsu Chemical Co., Ltd., Toray Dow Corning Co., Ltd., Momentive Performance Materials Japan Co., Ltd., Wacker Asahikasei Silicone Co., Ltd., etc.

[0035] As component (C), from the viewpoints of improving emulsifying properties, long-term storage stability, water-locking properties, and adjusting to a suitable viscosity, and also from the viewpoint of a good usability without stickiness or discomfort when applied to the skin, among these, silicone-based surfactants, polyoxyethylene hydrogenated castor oil, alkyl glycerol ethers, and sorbitan fatty acid esters are preferred, and silicone-based surfactants, polyoxyethylene hydrogenated castor oil, and alkyl glycerol ethers are more preferred, and alkyl glycerol ethers and silicone-based surfactants are further preferred.

[0036] As the silicone-based surfactant, polyether-modified silicones, polyglycerol-modified silicones, polyether-alkyl co-modified silicones, and polyglycerol-alkyl co-modified silicones are preferred, and polyether-modified silicones are more preferred. As the silicone chain, the straight-chain type, branched-chain type, and crosslinked type are preferred, and the straight-chain type and branched-chain type are more preferred, and the straight-chain type is further preferred. More specifically, polyether-modified silicones with a straight-chain silicone chain, polyether-modified silicones with a branched-chain silicone chain, polyether-alkyl co-modified silicones with a straight-chain silicone chain, and polyether-alkyl co-modified silicones with a branched-chain silicone chain are preferred, and polyether-modified silicones with a straight-chain silicone chain and polyether-modified silicones with a branched-chain silicone chain are more preferred, and polyether-modified silicones with a straight-chain silicone chain are further preferred.

[0037] As component (C), from the viewpoints of particularly improving emulsifying properties, long-term storage stability, water-locking properties, and adjusting to a suitable viscosity, and also from the viewpoint of being able to give a good usability without stickiness and discomfort to the skin after coating, polyoxyethylene hydrogenated castor oil, alkyl glycerol ethers, polyether-modified silicones with a straight-chain silicone chain, and polyether-modified silicones with a branched-chain silicone chain are preferred, and alkyl glycerol ethers and polyether-modified silicones with a straight-chain silicone chain are further preferred.

[0038] These can be used singly or in combination of two or more. From the viewpoints of improving emulsifying properties, long-term storage stability, maintaining excellent water-locking property, and having excellent skin protection, skin coverage, and glossiness, and being able to provide a good feeling of use without stickiness and discomfort, it is preferred to use two or more.

[0039] Examples of commercially available products include polyether-modified silicones such as silicone (Silicone) BY11-030 (PEG / PPG-19 / 19 Dimethicone) (Toray Dow Corning Co., Ltd.), silicone BY22-008M (PEG / PPG-19 / 19 Dimethicone) (Toray Dow Corning Co., Ltd.), silicone SH3775M (PEG-12 Dimethicone) (Toray Dow Corning Co., Ltd.), silicone KF-6015 (PEG-3 polydimethylsiloxane) (Shin-Etsu Chemical Co., Ltd.), silicone KF-6017 (PEG-10 polydimethylsiloxane) (Shin-Etsu Chemical Co., Ltd.), silicone KF-6028 (PEG-9 dimethicone ethoxy dimethicone) (Shin-Etsu Chemical Co., Ltd.); polyoxyethylene hydrogenated castor oils such as EMALEX HC-5 (PEG-5 hydrogenated castor oil) (Nihon Emulsion Co., Ltd.), EMALEX RWIS-315 (PEG-15 hydrogenated castor oil triisostearate) (Nihon Emulsion Co., Ltd.), and isostearyl glycerol ether. Among these, silicone BY11-030 (PEG / PPG-19 / 19 Dimethicone), silicone SH3775M (PEG-12 Dimethicone), silicone KF-6015 (PEG-3 polydimethylsiloxane), silicone KF-6017 (PEG-10 polydimethylsiloxane), silicone KF-6028 (PEG-9 dimethicone ethoxy dimethicone), EMALEX HC-5 (PEG-5 hydrogenated castor oil), and isostearyl glycerol ether are more preferred, and silicone KF-6015 (PEG-3 polydimethylsiloxane), silicone KF-6017 (PEG-10 polydimethylsiloxane), and isostearyl glycerol ether are further preferred. These can be used singly or in combination of two or more.

[0040] Here, HLB (Hydrophilic-Lipophilic Balance) represents the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and can be obtained using the Griffin formula.

[0041] From the viewpoints of improving emulsifying property, long-term storage stability, and water-locking property, adjusting to a suitable viscosity, and enabling the skin to have a good feeling of use without stickiness or discomfort after coating, the content of component (C) in the water-in-oil type emulsifying composition of the present invention is preferably 0.5% by mass or more, more preferably 0.8% by mass or more, further preferably 1% by mass or more. In addition, it is preferably 8% by mass or less, more preferably 7% by mass or less, further preferably 5% by mass or less, still more preferably 3.5% by mass or less, and particularly preferably 2% by mass or less. As a specific range, it is preferably 0.5% by mass or more and 8% by mass or less, more preferably 0.8% by mass or more and 7% by mass or less, further preferably 1% by mass or more and 5% by mass or less, still more preferably 1% by mass or more and 3.5% by mass or less, and particularly preferably 1% by mass or more and 2% by mass or less.

[0042] From the viewpoints of improving emulsifying property, long-term storage stability, water-locking property, adjusting to a suitable viscosity, and enabling the skin to have a good feeling of use without stickiness or discomfort after coating, the total content of component (B) and component (C) in the water-in-oil type emulsifying composition of the present invention is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, further preferably 1.5% by mass or more, still more preferably 2% by mass or more, and particularly preferably 2.5% by mass or more. In addition, it is preferably 15% by mass or less, more preferably 12% by mass or less, further preferably 10% by mass or less, still more preferably 8% by mass or less, particularly preferably 6% by mass or less, more particularly preferably 5% by mass or less, and most preferably 4.5% by mass or less. As a specific range, it is preferably 0.5% by mass or more and 12% by mass or less, more preferably 1.5% by mass or more and 10% by mass or less, further preferably 2% by mass or more and 8% by mass or less, still more preferably 2% by mass or more and 6% by mass or less, particularly preferably 2.5% by mass or more and 5% by mass or less, and most preferably 2.5% by mass or more and 4.5% by mass or less.

[0043] Component (D) is a dextrin fatty acid ester in which the fatty acid moiety has 8 to 22 carbon atoms. By containing such a dextrin fatty acid ester, it is possible to improve the water retention of the film obtained from the coating preparation, and to improve the skin protection feeling, skin coverage feeling and storage stability, and to adjust to a desired viscosity. In particular, when component (A) is a ceramide, it can be judged that by making component (D) coexist, the crystal size of component (A) in the water-in-oil emulsion composition is particularly small or becomes amorphous, and the water retention of the film of the preparation after coating and the skin protection feeling can be particularly improved. As the dextrin fatty acid ester of component (D), a dextrin fatty acid ester in which the fatty acid moiety has 12 to 18 carbon atoms is more preferred, a dextrin fatty acid ester in which the fatty acid moiety has 14 to 18 carbon atoms is further preferred, a dextrin fatty acid ester in which the fatty acid moiety has 14 to 16 carbon atoms is still further preferred, and a dextrin fatty acid ester in which the fatty acid moiety has 16 carbon atoms is particularly preferred. As specific examples, octanoic acid dextrin ester, decanoic acid dextrin ester, lauric acid dextrin ester, 2-ethylhexanoic acid dextrin ester, myristic acid dextrin ester, palmitic acid dextrin ester, stearic acid dextrin ester, isostearic acid dextrin ester, behenic acid dextrin ester, etc. can be cited, ethylhexanoic acid dextrin ester, myristic acid dextrin ester, palmitic acid dextrin ester, stearic acid dextrin ester are preferred, myristic acid dextrin ester, palmitic acid dextrin ester are more preferred, palmitic acid dextrin ester is still further preferred, and one or more of these can be used. In addition, two or more pre-manufactured dextrin fatty acid esters can also be used, or a mixed fatty acid dextrin ester obtained by mixing fatty acids during manufacture to form a mixed fatty acid and then reacting with dextrin can also be used.

[0044] The water-in-oil emulsion composition of the present invention contains 0.15% by mass or more and 8% by mass or less of component (D). If the content of component (D) is within this range, sufficient water retention can be obtained, and both the skin protection feeling and the gloss feeling are good, and the long-term storage stability is also excellent. In addition, from the same point of view, the content of component (D) is preferably 0.2% by mass or more, more preferably 0.3% by mass or more, further preferably 0.4% by mass or more, and preferably 6% by mass or less, more preferably 5% by mass or less, further preferably 4% by mass or less, still further preferably 2% by mass or less. As a specific range, it is preferably 0.2% by mass or more and 6% by mass or less, more preferably 0.3% by mass or more and 5% by mass or less, further preferably 0.4% by mass or more and 4% by mass or less, still further preferably 0.4% by mass or more and 2% by mass or less.

[0045] Component (E) is a hydrocarbon oil that is liquid at 25°C. In addition to component (A) (a solid oily component), by further formulating component (E) and formulating components (B) to (D), it is possible to not only improve the water retention, but also improve the skin moisturizing feeling and gloss feeling, and the long-term storage stability is also improved.

[0046] As such hydrocarbon oils, linear or branched hydrocarbon oils such as liquid paraffin, liquid isoparaffin, squalane, and squalene can be cited, and squalane is preferred. One or more of these can be used.

[0047] From the viewpoints of improving water-locking property, skin protection feeling, skin coverage feeling, gloss feeling, and good usability without stickiness and discomfort and long-term storage stability, the content of component (E) in the water-in-oil emulsion composition of the present invention is preferably 1% by mass or more, more preferably 3% by mass or more, further preferably 4% by mass or more, still further preferably 5% by mass or more, particularly preferably 7% by mass or more. In addition, it is preferably 30% by mass or less, more preferably 20% by mass or less, further preferably 18% by mass or less, still further preferably 16% by mass or less, particularly preferably 15% by mass or less, more particularly preferably 12% by mass or less, and most preferably 10% by mass or less. As a specific range, it is preferably 1% by mass or more and 30% by mass or less, more preferably 3% by mass or more and 30% by mass or less, further preferably 3% by mass or more and 20% by mass or less, still further preferably 4% by mass or more and 18% by mass or less, particularly preferably 5% by mass or more and 16% by mass or less, more particularly preferably 7% by mass or more and 15% by mass or less, more particularly preferably 7% by mass or more and 12% by mass or less, and most preferably 7% by mass or more and 10% by mass or less.

[0048] The water-in-oil emulsion composition of the present invention contains (F) water as an aqueous phase component. From the viewpoints of water-locking property, skin protection feeling, gloss feeling, and long-term storage stability, the content of water in the water-in-oil emulsion composition of the present invention is preferably 10% by mass or more, more preferably 15% by mass or more, still further preferably 20% by mass or more. In addition, it is preferably 65% by mass or less, more preferably 60% by mass or less, still further preferably 50% by mass or less. As a specific range, it preferably contains 10% by mass or more and 65% by mass or less, more preferably contains 15% by mass or more and 60% by mass or less, still further preferably contains 20% by mass or more and 50% by mass or less.

[0049] In addition to components (A) to (F), the water-in-oil emulsion composition of the present invention can further improve the water-locking property of the film after coating and make the skin protection feeling and gloss feeling better by containing (G) one or more selected from dimer acid esters and N-acyl amino acid esters.

[0050] Examples of the dimer acid ester include esters of dimer acid and alcohols, etc. Preferred is an ester of dimer dilinoleic acid, and more preferred is an ester of dimer dilinoleic acid and dimer diol. In addition, as the ester moiety of dimer acid or dimer dilinoleic acid, it preferably contains one or more moieties selected from behenyl, isostearyl, stearyl, cetyl, phytosteryl, and more preferably contains two or more moieties selected from behenyl, isostearyl, stearyl, cetyl, phytosteryl. More specifically, examples include dimer dilinoleic acid dimer dilinolenyl bis(behenate / isostearate / phytostearate), dimer dilinoleic acid dimer dilinolenyl bis(phytostearate / isostearate / cetylate / stearate / behenate), dimer dilinoleic acid (phytostearate / isostearate / cetylate / stearate / behenate), dimer dilinoleic acid bis(isostearate / phytostearate), diisostearic acid dimer dilinoleate, etc. Preferred are dimer dilinoleic acid (phytostearate / isostearate / cetylate / stearate / behenate), dimer dilinoleic acid bis(isostearate·phytostearate), and more preferred is dimer dilinoleic acid (phytostearate / isostearate / cetylate / stearate / behenate).

[0051] Examples of commercially available products include "Plandool-S, -H" which is dimer dilinoleic acid (phytostearate / isostearate / cetylate / stearate / behenate) manufactured by Nippon Fine Chemical Co., Ltd., "LUSPLAN PI-DA" which is dimer dilinoleic acid bis(isostearate / phytostearate), "LUSPLANDD-DA" which is dimer dilinoleic acid dimer dilinoleate, "Plandool-G" which is dimer dilinoleic acid dilinolenyl (behenate / isostearate / phytostearate), and "LUSPLAN DD-IS" which is diisostearic acid dimer dilinoleate.

[0052] The number of carbon atoms of the acyl group in the ester of N-acyl amino acid is preferably 10 to 30, more preferably 12 to 18. In addition, the acyl group can be saturated or unsaturated. For example, 2-ethylhexanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, behenoyl, oleoyl, isostearoyl, linolenoyl, etc. are preferred, myristoyl and lauroyl are more preferred, and lauroyl is further preferred. In addition, the acyl group can be derived from mixed fatty acids, and coconut oil fatty acid ester, palm oil fatty acid ester, palm kernel oil fatty acid ester, sunflower seed oil fatty acid ester, macadamia nut oil fatty acid ester are preferred, and coconut oil fatty acid ester and palm kernel oil fatty acid ester are more preferred.

[0053] In addition, the ester of N-acyl amino acid is preferably an alkyl ester of N-acyl amino acid. The number of carbon atoms of the alkyl group constituting the alkyl ester is preferably 1 to 30, more preferably 12 to 18. In addition, the alkyl group may be branched, straight-chain, or may have a cyclic structure. For example, octyl, lauryl, cetyl, stearyl, isostearyl, behenyl, octyldodecyl, phytosterol groups such as campesteryl and sitosteryl, cholesteryl, decyltetradecyl, etc. are preferably exemplified.

[0054] As the amino acid moiety in the N-acyl amino acid ester, it is an acidic amino acid, a neutral amino acid, or a basic amino acid, preferably an acidic amino acid or a neutral amino acid, and more preferably an acidic amino acid. More specifically, glutamic acid, aspartic acid, alanine, arginine, glycine, N-methylalanine, histidine, serine, threonine, sarcosine, etc. are preferred, and glutamic acid, aspartic acid, alanine, N-methylalanine, and sarcosine are more preferred, and glutamic acid is further preferred.

[0055] In addition, regarding the ester of N-acyl amino acid, a diester is more preferred than a monoester. N-acyl lauroyl glutamate diester and N-acyl aspartic acid diester are more preferred, and N-acyl lauroyl glutamate diester is further preferred. The alkyl groups present in one molecule of the diester may be the same or different, and preferably there are two or more kinds.

[0056] In the present invention, the ester of N-acyl amino acid may contain one kind or may contain two or more kinds in combination. For example, N-lauroyl-L-glutamic acid bis(cholesterol ester / behenyl ester / octyldodecyl ester), N-lauroyl-L-glutamic acid bis(cholesterol ester / octyldodecyl ester), N-lauroyl-L-glutamic acid bis(phytosterol ester / behenyl ester / octyldodecyl ester), N-lauroyl-L-glutamic acid bis(phytosterol ester / octyldodecyl ester), N-lauroyl-L-glutamic acid bis(phytosterol ester / octyldodecyl ester), N-myristoyl-N-methylalanine (phytosterol ester / decyltetradecyl ester), etc. are preferably exemplified, and N-lauroyl-L-glutamic acid bis(cholesterol ester / octyldodecyl ester) and N-lauroyl-L-glutamic acid bis(phytosterol ester / octyldodecyl ester) are more preferably exemplified.

[0057] Examples of commercially available products of esters of N-acyl amino acids include: "ELDEW PS-203", "Plandool-LG2" (N-lauroyl-L-glutamic acid bis(phytosterol ester / octyldecyl ester)), "ELDEW CL-301" (N-lauroylglutamic acid bis(cholesterol ester / behenate / octyldodecyl ester)), "ELDEW CL-202" (N-lauroylglutamic acid bis(cholesterol ester / octyldodecyl ester)), "ELDEW PS-304", "ELDEW PS-306", "Plandool-LG1", "Plandool-LG3", "Plandool-LG4" (N-lauroylglutamic acid bis(phytosterol ester / behenate / octyldodecyl ester)), "ELDEW APS-307" (N-myristoyl-N-methylalanine (phytosterol ester / decyldodecyl ester)), etc., which are sold by Ajinomoto Co., Inc. and Nippon Fine Chemical Co., Ltd.

[0058] These dimer acid esters and N-acyl amino acid esters may contain one kind or may contain two or more kinds in combination, and preferably contain two or more kinds in combination.

[0059] Component (G) is preferably selected from one or more than two kinds of dimer acid esters and N-acyl amino acid esters, more preferably selected from one or more than two kinds of dimer dilinoleic acid esters and N-acyl amino acid diesters, and further preferably selected from one or more than two kinds of dimer dilinoleic acid esters and N-acyl glutamic acid diesters. In addition, component (G) containing dimer acid esters and N-acyl amino acid esters preferably contains two or more kinds, and more preferably contains both dimer dilinoleic acid esters and N-acylated glutamic acid diesters.

[0060] From the viewpoints of improving water retention, skin protection feeling and gloss feeling, and long-term storage stability, the content of component (G) in the water-in-oil emulsion composition of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 2% by mass or more, still further preferably 2.5% by mass or more, particularly preferably 3% by mass or more. In addition, it is preferably 20% by mass or less, more preferably 12% by mass or less, further preferably 9% by mass or less, still more preferably 7% by mass or less. As a specific range, it is preferably 0.5% by mass or more and 20% by mass or less, more preferably 0.5% by mass or more and 12% by mass or less, further preferably 1% by mass or more and 9% by mass or less, still further preferably 2% by mass or more and 9% by mass or less, particularly preferably 2.5% by mass or more and 9% by mass or less, and most preferably 3% by mass or more and 7% by mass or less.

[0061] The water-in-oil emulsion composition of the present invention may contain, in addition to the above-mentioned components, liquid oils other than component (E), moisturizers, medicinal ingredients, colorants, preservatives, antioxidants, chelating agents, fragrances, and the like.

[0062] Here, as liquid oils other than component (E), silicone oil, ester oil, fluorine oil, etc. can be listed. As moisturizers, polyols such as glycerol, 1,3-butylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, sorbitol, maltitol, mannitol, erythritol, xylitol, trehalose, plant extracts, betaine, POE methyl glucoside, polyethylene glycol, etc. can be listed. As medicinal ingredients, water-soluble drugs and non-water-soluble drugs can be used arbitrarily, and specifically, allantoin, glycyrrhizic acid, glycyrrhetinic acid stearyl and other glycyrrhetinic acid esters, isopropyl cresol, retinol derivatives, anti-wrinkle agents, whitening agents, bactericides, plant extracts, tocopherol acetate, vitamins, salicylic acid, indomethacin, etc. can also be used. Other medicinal ingredients used in cosmetics, quasi-drugs, and pharmaceuticals can also be used.

[0063] The water-in-oil emulsion composition of the present invention may be a water-in-oil emulsion composition that is easily applied to the skin, and preferably has a viscosity of 15 Pa·s or more at 25°C, more preferably 20 Pa·s or more, further preferably 25 Pa·s or more, and further preferably 30 Pa·s or more, and preferably 5000 Pa·s or less, more preferably 1000 Pa·s or less, further preferably 500 Pa·s or less, further preferably 300 Pa·s or less, and particularly preferably 150 Pa·s or less. As a specific range, a creamy state of preferably 15 Pa·s or more and 5000 Pa·s or less, more preferably 20 Pa·s or more and 1000 Pa·s or less, further preferably 20 Pa·s or more and 500 Pa·s or less, further preferably 25 Pa·s or more and 300 Pa·s or less, and particularly preferably 30 Pa·s or more and 150 Pa·s or less is preferred. Here, the viscosity at 25°C can be measured using a B8R type viscometer at 25°C for 1 minute.

[0064] The water-in-oil emulsion composition of the present invention can be prepared by a conventional method, for example, by heating and stirring an oily component (water-insoluble component) and mixing it, and then heating and stirring a water-soluble component and mixing it. The water-soluble component mixture is added to the oily component mixture and mixed, and the mixture is sufficiently stirred with a homogenizer and then cooled, thereby preparing the water-in-oil emulsion composition of the present invention.

[0065] In addition, the use of the water-in-oil emulsion composition of the present invention is not particularly limited, and it is preferably used for coating hair and / or skin, and particularly preferably used for coating the skin of the face, body, hands and feet, etc. In addition, it is preferably used as a topical skin agent, and more preferably used as a skin cosmetic. The method of use is not particularly limited, and it is preferably applied to hair and / or skin by hand or tool, and more preferably applied to skin by hand or tool.

[0066] Regarding the above embodiments, the present invention further discloses the following compositions.

[0067] <1> A water-in-oil emulsion composition containing the following components (A), (B), (C), (D), (E) and (F):

[0068] (A) An oily component having a melting point of 50 to 150 °C: 1% by mass or more and 30% by mass or less;

[0069] (B) Polyglycerol fatty acid ester: 0.5% by mass or more and 8% by mass or less;

[0070] (C) A lipophilic surfactant having an HLB of 2 to 6 other than component (B);

[0071] (D) Dextrin fatty acid ester having 8 to 22 carbon atoms in the fatty acid moiety: 0.15% by mass or more and 8% by mass or less;

[0072] (E) A hydrocarbon oil that is liquid at 25 °C;

[0073] (F) Water.

[0074] <2> The water-in-oil emulsion composition according to <1>, wherein component (A) is selected from ceramides, sphingosines (including natural and synthetic ones), etc. sphingolipids; cholesterol, dehydrocholesterol, β-sitosterol, stearoyl cholesterol ester, isostearoyl cholesterol ester, vegetable oil fatty acid cholesterol ester and other sterols and their analogs; stearic acid, behenic acid and other C 16 -C 22 fatty acids; cetyl alcohol, stearyl alcohol, behenyl alcohol, batyl alcohol, selachyl alcohol and other C 16 -C 22 alcohols and their analogs; preferably selected from ceramides (especially natural ceramides, sphingosines, the compounds of the above general formulas (1) and (2)), C 16 -C 22 fatty acids and C 16 -C 22 alcohols; being ceramides; more preferably selected from the compounds of the above general formula (1) and the above general formula (2); even more preferably the compound of the above general formula (1).

[0075] <3> The water-in-oil type emulsion composition as described in <1> or <2>, wherein the content of component (A) in the water-in-oil type emulsion composition is preferably 1.5% by mass or more, more preferably 2% by mass or more, further preferably 3% by mass or more, still more preferably 5% by mass or more, and preferably 20% by mass or less, more preferably 18% by mass or less, further preferably 16% by mass or less.

[0076] <4> The water-in-oil type emulsion composition as described in any one of <1> to <3>, wherein component (B) is preferably diglycerol fatty acid ester or triglycerol fatty acid ester, more preferably diglycerol C 16 -C 22 fatty acid ester or triglycerol C 16 -C 22 fatty acid ester, and further preferably diglycerol isostearate or triglycerol isostearate.

[0077] <5> The water-in-oil type emulsion composition as described in any one of <1> to <4>, wherein the content of component (B) in the water-in-oil type emulsion composition is preferably 0.7% by mass or more, more preferably 0.8% by mass or more, further preferably 1% by mass or more, and preferably 7% by mass or less, more preferably 6% by mass or less, further preferably 5% by mass or less, still more preferably 3% by mass or less.

[0078] <6> The water-in-oil type emulsion composition as described in any one of <1> to <5>, wherein component (C) is preferably a nonionic surfactant with an HLB value in the range of 2 to 6, and is preferably selected from one or more of glycerol fatty acid ester, propylene glycol fatty acid ester, sorbitan fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid ester, polyethylene glycol fatty acid ester, alkyl glycerol ether, alkyl polyglycerol ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl ether fatty acid ester, polyoxyethylene alkylamine, and silicone-based surfactants, preferably polyoxyethylene hydrogenated castor oil, alkyl glycerol ether, polyether-modified silicone with a straight silicone chain, and polyether-modified silicone with a branched silicone chain, and further preferably alkyl glycerol ether and polyether-modified silicone with a straight silicone chain.

[0079] <7> The water-in-oil type emulsion composition as described in any one of <1> to <6>, wherein the content of component (C) in the water-in-oil type emulsion composition is preferably 0.5% by mass or more, more preferably 0.8% by mass or more, further preferably 1% by mass or more, and preferably 8% by mass or less, more preferably 7% by mass or less, further preferably 5% by mass or less, still more preferably 3.5% by mass or less, and particularly preferably 2% by mass or less.

[0080] <8> The water-in-oil type emulsified composition according to any one of <1> to <7>, wherein the total content of component (B) and component (C) in the water-in-oil type emulsified composition is preferably 1.0% by mass or more, more preferably 1.5% by mass or more, still more preferably 2% by mass or more, even more preferably 2.5% by mass or more, and further preferably 12% by mass or less, more preferably 10% by mass or less, still more preferably 8% by mass or less, even more preferably 6% by mass or less, particularly preferably 5% by mass or less, and most preferably 4.5% by mass or less.

[0081] <9> The water-in-oil type emulsified composition according to any one of <1> to <8>, wherein component (D) is preferably a dextrin fatty acid ester having 12 to 18 carbon atoms in the fatty acid moiety, more preferably a dextrin fatty acid ester having 14 to 18 carbon atoms in the fatty acid moiety, still more preferably a dextrin fatty acid ester having 14 to 16 carbon atoms in the fatty acid moiety, and particularly preferably a dextrin fatty acid ester having 16 carbon atoms in the fatty acid moiety.

[0082] <10> The water-in-oil type emulsified composition according to any one of <1> to <9>, wherein the content of component (D) in the water-in-oil type emulsified composition is preferably 0.2% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.4% by mass or more, and further preferably 6% by mass or less, more preferably 5% by mass or less, still more preferably 4% by mass or less, and even more preferably 2% by mass or less.

[0083] <11> The water-in-oil type emulsified composition according to any one of <1> to <10>, wherein component (E) is a straight-chain or branched hydrocarbon oil such as liquid paraffin, liquid isoparaffin, squalane, or squalene, and is preferably squalane.

[0084] <12> The water-in-oil type emulsified composition according to any one of <1> to <11>, wherein the content of component (E) in the water-in-oil type emulsified composition is preferably 3% by mass or more, more preferably 4% by mass or more, still more preferably 5% by mass or more, even more preferably 7% by mass or more, and further preferably 20% by mass or less, more preferably 18% by mass or less, still more preferably 16% by mass or less, and even more preferably 12% by mass or less.

[0085] <13> The water-in-oil type emulsified composition according to any one of <1> to <12>, wherein the content of component (F) is preferably 10% by mass or more, more preferably 15% by mass or more, still more preferably 20% by mass or more, and further preferably 65% by mass or less, more preferably 60% by mass or less, still more preferably 50% by mass or less.

[0086] <14> The water-in-oil emulsion composition according to any one of <1> to <13>, further comprising component (G): one or more selected from dimer acid esters and N-acyl amino acid esters.

[0087] <15> The water-in-oil emulsion composition according to <14>, wherein component (G) is more preferably one or more selected from dimer dilinoleate and N-acyl amino acid diesters, and further preferably one or more selected from dimer dilinoleate and N-acyl glutamate diesters.

[0088] <16> The water-in-oil emulsion composition according to <14> or <15>, wherein the content of component (G) is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 2% by mass or more, still more preferably 3% by mass or more, and preferably 12% by mass or less, more preferably 9% by mass or less, further preferably 7% by mass or less.

[0089] <17> The water-in-oil emulsion composition according to any one of <1> to <16>, wherein the viscosity at 25°C is preferably 15 Pa·s or more, more preferably 20 Pa·s or more, further preferably 25 Pa·s or more, still more preferably 30 Pa·s or more, and preferably 5000 Pa·s or less, more preferably 1000 Pa·s or less, further preferably 500 Pa·s or less, still more preferably 300 Pa·s or less, and particularly preferably 150 Pa·s or less.

[0090] <18> A water-in-oil emulsion composition comprising the following components (A), (B), (C), (D), (E) and (F):

[0091] (A) Ceramides: 1% by mass or more and 30% by mass or less;

[0092] (B) Polyglycerol fatty acid esters: 0.5% by mass or more and 8% by mass or less;

[0093] (C) Polyether-modified silicone with an HLB of 2 to 6;

[0094] (D) Dextrin fatty acid esters having 12 to 18 carbon atoms in the fatty acid moiety: 0.15% by mass or more and 8% by mass or less;

[0095] (E) Hydrocarbon oil that is liquid at 25°C;

[0096] (F) Water.

[0097] <19> The water-in-oil emulsion composition according to <18>, wherein component (B) is one or more selected from polyglycerol di-fatty acid esters and polyglycerol tri-fatty acid esters.

[0098] <20> The water-in-oil emulsion composition according to <18> or <19>, wherein component (A) is a compound of the above general formula (1).

[0099] <21> The water-in-oil emulsion composition according to any one of <18> to <20>, wherein component (E) is squalane.

[0100] <22> The water-in-oil emulsion composition according to any one of <18> to <21>, further comprising component (G): one or more selected from dimer acid esters and N-acylamino acid esters.

[0101] <23> The water-in-oil emulsion composition according to any one of <1> to <22>, which is a skin external preparation, preferably a skin cosmetic.

[0102] <24> A method for using a water-in-oil emulsion composition, comprising applying the water-in-oil emulsion composition according to any one of <1> to <23> above to the skin other than hair, preferably to the face, body, hands and feet.

[0103] Example

[0104] The present invention will be described in more detail below with reference to Examples and Comparative Examples.

[0105] Examples 1 to 21 and Comparative Examples 1 to 7

[0106] The components shown in Tables 1 to 6 were used to prepare a water-in-oil emulsion composition. That is, the oily component (water-insoluble component) was stirred and mixed at 80 to 85° C., and then the water-soluble component was stirred and mixed at 80 to 85° C. The water-soluble component mixture was added to the oily component mixture and mixed, and the mixture was sufficiently stirred at 80 to 85° C. using a homogenizer, and then cooled to obtain a water-in-oil emulsion composition.

[0107] The obtained water-in-oil emulsion composition was evaluated for water retention (moisture evaporation inhibition rate), skin protection feeling (skin coverage feeling), skin gloss feeling (skin gloss feeling), and the feeling of no stickiness and no discomfort on the skin after application by the following evaluation method. In addition, storage stability was also evaluated.

[0108] The evaluation results are shown in Tables 1 to 6.

[0109] (1) Water evaporation inhibition rate

[0110] Filter paper (manufactured by ADVANTEC, No. 5B, diameter 21 mm)

[0111] · Pierce vial CV-400 (product sold by AS-ONE, product code 5-106-06, inner diameter × body diameter × total height: φ17 × φ27 × 95 mm, capacity: 40 mL)

[0112] · Calcium chloride (for drying): manufactured by Junsei Chemical Co., Ltd.

[0113] · Desiccator

[0114] · Pipette MICROMAN (manufactured by GILSON)

[0115] (i) Remove the resin cap attached to the screw cap of the pierce vial.

[0116] (ii) On a filter paper, use a 0.03 mL pipette (MICROMAN) to aspirate the prepared water-in-oil emulsion composition, and use a spatula to evenly coat it only on the surface of the filter paper.

[0117] (iii) Install the filter paper inside the screw cap in such a way that the surface coated with the water-in-oil emulsion composition contacts the inner surface of the screw cap of the pierce vial. In addition, a test sample with only a filter paper not coated with the water-in-oil emulsion composition was also prepared.

[0118] (iv) Fill 10 mL of distilled water into the pierce vial, and seal it with the screw cap with the filter paper installed in (iii) to form a test sample.

[0119] (v) Use an electronic balance to measure the weight of the test sample (= the total weight of the filter paper coated with the preparation, the screw cap, the pierce vial, and the water).

[0120] (vi) Put calcium chloride (for drying) in the desiccator, put the test sample in and seal it, and let it stand at 20 °C for 5 days. In addition, the relative humidity inside the desiccator at this time is 5RH%.

[0121] (vii) Take out the test sample from the desiccator and measure the weight of the test sample (= the total weight of the filter paper coated with the preparation, the screw cap, the pierce vial, and the water).

[0122] (viii) Prepare 3 test samples for each of one example and one comparative example. Also prepare 3 test samples with nothing coated on the filter paper.

[0123] (ix) Measure the amount of water evaporation and calculate the water evaporation inhibition rate of the water-in-oil emulsion composition shown in the examples and comparative examples.

[0124] The amount of water evaporation (W a ) of the test sample coated with the water-in-oil emulsion composition = (weight of the test sample after 5 days of drying) - (weight of the test sample before drying)

[0125] W a Average = (W a1 + W a2 + W a3 ) / 3

[0126] The water evaporation amount (W0) of the test body of the uncoated water-in-oil emulsion composition = (the weight of the test body after 5 days of drying) - (the weight of the test body before drying)

[0127] W0 Average = (W 01 + W 02 + W 03 ) / 3

[0128] Water evaporation inhibition rate (%) = ((W0 Average - W a Average) / W0 Average) × 100

[0129] (2) Skin protection feeling, skin gloss feeling

[0130] For the water-in-oil emulsion compositions of the examples and comparative examples, 4 professional evaluation panel members evaluated them according to the following usage method.

[0131] (i) The professional evaluation panel members used the commercially available Curel Moisture Foam Facial Wash manufactured by Kao Corporation to wash their faces and then wiped them with a towel.

[0132] (ii) Take 0.5 g of the water-in-oil emulsion composition on the finger and apply it to the entire face.

[0133] (iii) 10 minutes after coating, the professional evaluation panel members evaluated the skin protection feeling according to the following criteria and obtained the average score of 4. In addition, in a room with a certain brightness, the professional evaluation panel members looked at the mirror and evaluated the skin gloss feeling according to the following criteria and obtained the average score of 4.

[0134] (Skin protection feeling)

[0135] 5 points: There is a strong skin coverage feeling.

[0136] 4 points: There is a skin coverage feeling.

[0137] 3 points: There is a slight skin coverage feeling.

[0138] 2 points: There is almost no skin coverage feeling.

[0139] 1 point: There is no skin coverage feeling at all.

[0140] (Skin gloss feeling)

[0141] 5 points: There is a strong gloss feeling.

[0142] 4 points: There is a gloss feeling.

[0143] 3 points: Slightly shiny.

[0144] 2 points: Not very shiny.

[0145] 1 point: No shine.

[0146] (3) Feeling without stickiness and discomfort

[0147] For the water-in-oil emulsion compositions of the examples and comparative examples, 4 professional evaluation team members evaluated them according to the following usage method.

[0148] (i) The professional evaluation team members washed their faces with the commercially available Curel Moisture Foam Cleanser manufactured by Kao Corporation, and then wiped them with a towel.

[0149] (ii) Take 0.5 g of the water-in-oil emulsion composition on the fingertips and apply it to the entire face.

[0150] (iii) 3 hours after coating, the professional evaluation team members evaluated the skin's sense of burden according to the following criteria and obtained the average score of 4 people.

[0151] 5 points: No stickiness and no discomfort.

[0152] 4 points: Almost no stickiness and no discomfort.

[0153] 3 points: Not very sticky and not very uncomfortable.

[0154] 2 points: Sticky and slightly uncomfortable.

[0155] 1 point: Seriously sticky and uncomfortable.

[0156] (3) Storage stability

[0157] Put 80 mL of the water-in-oil emulsion compositions of the examples and comparative examples into a 110 mL transparent glass container (standard bottle #11, Tokyo Glass Instrument Co., Ltd.) and seal it, and store it at room temperature for a certain period of time. Visually judge the appearance of these water-in-oil emulsion compositions after storage, and make a judgment according to the following criteria.

[0158] ○: A uniform layer, without separation of the aqueous component and the oily component. Creamy.

[0159] △: Partial separation of the aqueous component and the oily component occurs, but the whole still remains creamy.

[0160] ×: Separation of the aqueous component and the oily component occurs as a whole, and the whole does not remain creamy.

[0161] (4) Viscosity

[0162] Measurement was carried out using a TVB-10 viscometer manufactured by Toki Sangyo Co., Ltd., with rotor: T-C, rotation speed: 5 rpm, measurement time: 1 minute, and measurement temperature: 25°C.

[0163] [Table 1]

[0164]

[0165] *1: Sphingolipid E (manufactured by Kao Corporation)

[0166] *2: GE-IS(U)(HLB2) (manufactured by Kao Corporation)

[0167] *3: Silicone KF-6015 (PEG-3 polydimethylsiloxane, HLB 4.5) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0168] *4: Cosmol 42V (polyglycerol diisostearate-2) (manufactured by Nisshin Oillio Group, Ltd.)

[0169] *5: Silicone KF-96A-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0170] *6: Silicone KF-96A-6CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0171] *7: Silicone KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0172] *8: ELDEW CL-202 (manufactured by Ajinomoto Co., Inc.)

[0173] *9: ELDEW PS-203 (manufactured by Ajinomoto Co., Inc.)

[0174] *10: Plandool-H (manufactured by Nippon Fine Chemical Co., Ltd.)

[0175] *11: RHEOPEARL KL2 (manufactured by Chiba Flour Milling Co., Ltd.) [Table 2]

[0176]

[0177] *1: Sphingolipid E (manufactured by Kao Corporation)

[0178] *2: GE-IS(U)(HLB2) (manufactured by Kao Corporation)

[0179] *3: Silicone KF-6015 (PEG-3 polydimethylsiloxane, HLB 4.5) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0180] *4: Cosmol 42V (polyglyceryl-2 diisostearate) (manufactured by Nisshin OilliO Group, Ltd.)

[0181] *5: Silicone KF-96A-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0182] *6: Silicone KF-96A-6CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0183] *7: Silicone KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0184] *8: ELDEW CL-202 (manufactured by Ajinomoto Co., Inc.)

[0185] *9: ELDEW PS-203 (manufactured by Ajinomoto Co., Inc.)

[0186] *10: Plandool-H (manufactured by Nippon Fine Chemical Co., Ltd.)

[0187] *11: RHEOPEARL KL2 (manufactured by Chiba Flour Milling Co., Ltd.)

[0188] *12: Cosmol 43V (manufactured by Nisshin OilliO Group, Ltd.) [Table 3]

[0189]

[0190] *1: Sphingolipid E (manufactured by Kao Corporation)

[0191] *2: GE-IS(U)(HLB2) (manufactured by Kao Corporation)

[0192] *3: Silicone KF-6015 (PEG-3 polydimethylsiloxane, HLB4.5) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0193] *4: Cosmol 42V (polyglyceryl-2 diisostearate) (manufactured by Nisshin OilliO Group, Ltd.)

[0194] *5: Silicone KF-96A-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0195] *6: Silicone KF-96A-6CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0196] *7: Silicone KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0197] *8: ELDEW CL-202 (manufactured by Ajinomoto Co., Inc.)

[0198] *9: ELDEW PS-203 (manufactured by Ajinomoto Co., Inc.)

[0199] *10: Plandool-H (manufactured by Nippon Fine Chemical Co., Ltd.)

[0200] *11: RHEOPEARL KL2 (manufactured by Chiba Flour Milling Co., Ltd.)

[0201] *13: BRS661-C (manufactured by Kao Corporation)

[0202] *14: Silicone SH3775M (PEG-12 polydimethylsiloxane, HLB 5) (manufactured by Toray Dow Corning Co., Ltd.)

[0203] *15: EMALEX HC-5 (PEG-5 hydrogenated castor oil, HLB 5) (manufactured by Nihon Emulsion Co., Ltd.)

[0204] *16: Silicone TSF405A (manufactured by Momentive Performance Materials Japan Co., Ltd.)

[0205] *17: Silicone KF-96A-1CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0206] *18: Silicone KT-16 (manufactured by Momentive Performance Materials Japan Co., Ltd.)

[0207] *19: EXCEPARL IS-CE-A (manufactured by Kao Corporation)

[0208] *20: RHEOPEARL MKL2 (manufactured by Chiba Flour Milling Co., Ltd.)[Table 4]

[0209]

[0210] *1: Sphingolipid E (manufactured by Kao Corporation)

[0211] *2: GE-IS(U) (HLB 2) (manufactured by Kao Corporation)

[0212] *3: Silicone KF-6015 (PEG-3 polydimethylsiloxane, HLB 4.5) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0213] *4: Cosmol 42V (polyglycerol diisostearate-2) (manufactured by Nisshin Oillio Group, Ltd.)

[0214] *5: Silicone KF-96A-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0215] *6: Silicone KF-96A-6CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0216] *7: Silicone KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0217] *8: ELDEW CL-202 (manufactured by Ajinomoto Co., Inc.)

[0218] *9: ELDEW PS-203 (manufactured by Ajinomoto Co., Inc.)

[0219] *10: Plandool-H (manufactured by Nippon Fine Chemical Co., Ltd.)

[0220] *11: RHEOPEARL KL2 (manufactured by Chiba Flour Milling Co., Ltd.)

[0221] *15: EMALEX HC-5 (PEG-5 hydrogenated castor oil, HLB5) (manufactured by Nihon Emulsion Co., Ltd.)

[0222] *21: Silicone KF-6017 (PEG-10 polydimethylsiloxane, HLB5) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0223] *22: Silicone KF-6028 (PEG-9 dimethicone copolyol, HLB4) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0224] [Table 5]

[0225]

[0226] *1: Sphingolipid E (manufactured by Kao Corporation)

[0227] *3: Silicone KF-6015 (PEG-3 polydimethylsiloxane, HLB4.5) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0228] *4: Cosmol 42V (polyglyceryl-2 diisostearate) (manufactured by Nisshin OilliO Group, Ltd.)

[0229] *5: Silicone KF-96A-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0230] *6: Silicone KF-96A-6CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0231] *7: Silicone KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0232] *11: RHEOPEARL KL2 (manufactured by Chiba Flour Milling Co., Ltd.)

[0233] *12: Cosmol 43V (polyglyceryl-2 triisostearate) (manufactured by Nisshin OilliO Group, Ltd.)

[0234] *21: Silicone KF-6017 (PEG-10 dimethicone, HLB 5) (manufactured by Shin-Etsu Chemical Co., Ltd.) [Table 6]

[0235]

[0236] *1: Sphingolipid E (manufactured by Kao Corporation)

[0237] *2: GE-IS(U) (HLB 2) (manufactured by Kao Corporation)

[0238] *3: Silicone KF-6015 (PEG-3 dimethicone, HLB 4.5) (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0239] *4: Cosmol 42V (manufactured by Nisshin OilliO Group, Ltd.)

[0240] *5: Silicone KF-96A-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0241] *6: Silicone KF-96A-6CS (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0242] *7: Silicone KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0243] *8: ELDEW CL-202 (manufactured by Ajinomoto Co., Inc.)

[0244] *9: ELDEW PS-203 (manufactured by Ajinomoto Co., Inc.)

[0245] *10: Plandool-H (manufactured by Nippon Fine Chemical Co., Ltd.)

[0246] *11: RHEOPEARL KL2 (manufactured by Chiba Flour Milling Co., Ltd.)

[0247] *23: PARLEAM EX (manufactured by NOF Corporation).

Claims

1. An oil-in-water emulsion composition, characterized in that: it contains the following components (A), (B), (C), (D), (E) and (F): (A) An oily component having a melting point of 50 to 150 °C: 1% by mass or more and 30% by mass or less; (B) Polyglycerol fatty acid ester: 0.5% by mass or more and 8% by mass or less; (C) A lipophilic surfactant having an HLB of 2 to 6 other than component (B); (D) Dextrin fatty acid ester having 8 to 22 carbon atoms in the fatty acid moiety: 0.15% by mass or more and 8% by mass or less; (E) A hydrocarbon oil that is liquid at 25 °C; (F) Water.

2. The oil-in-water emulsion composition according to claim 1, characterized in that: Component (A) is ceramides.

3. The oil-in-water emulsion composition according to claim 1 or 2, characterized in that: Component (B) is one or more selected from diglycerol fatty acid ester and triglycerol fatty acid ester.

4. The oil-in-water emulsion composition according to any one of claims 1 to 3, characterized in that: Component (C) is polyether-modified silicone.

5. The oil-in-water emulsion composition according to any one of claims 1 to 4, characterized in that: The composition is in the form of a cream having a viscosity of 15 Pa·s or more and 5000 Pa·s or less at 25 °C.

6. The oil-in-water emulsion composition according to any one of claims 1 to 5, characterized in that: The content of component (A) in the oil-in-water emulsion composition is 1.5% by mass or more and 20% by mass or less.

7. The oil-in-water emulsion composition according to any one of claims 1 to 6, characterized in that: The content of component (B) in the oil-in-water emulsion composition is 0.7% by mass or more and 7% by mass or less.

8. The oil-in-water emulsion composition according to any one of claims 1 to 7, characterized in that: The content of component (D) in the oil-in-water emulsion composition is 0.2% by mass or more and 6% by mass or less.

9. The oil-in-water emulsion composition according to any one of claims 1 to 8, characterized in that: The total content of component (B) and component (C) in the oil-in-water emulsion composition is 0.5% by mass or more and 12% by mass or less.

10. The oil-in-water emulsion composition according to any one of claims 1 to 9, characterized in that: Component (A) is a compound represented by the general formula (1): In the formula, R 1b represents a hydrocarbon group having 10 to 26 carbon atoms; R 2b represents a hydrocarbon group having 9 to 25 carbon atoms; X represents -(CH2) n -, where n represents an integer of 2 to 6.

11. The oil-in-water emulsion composition according to any one of claims 1 to 10, characterized in that: Component (D) is dextrin fatty acid ester having 12 to 18 carbon atoms in the fatty acid moiety.

12. The oil-in-water emulsion composition according to any one of claims 1 to 11, characterized in that: Component (E) is squalane.

13. The oil-in-water emulsion composition according to any one of claims 1 to 12, characterized in that: The composition is in the form of a cream having a viscosity of 20 Pa·s or more and 1000 Pa·s or less at 25 °C.

Images