Water-in-oil emulsion composition

Abstract

To provide a water-in-oil emulsion composition with thickening properties, containing an organic modified clay mineral and a surfactant.SOLUTION: A water-in-oil emulsion composition in cream or gel form contains (a) an organic modified clay mineral, (b) an ethylene oxide-added nonionic surfactant, (c) an oil-based component, and (d) water, where the (b) nonionic surfactant has a structure with ethylene oxide ether-bonded to one monohydric alcohol. The average ethylene oxide addition molar number is 6 to 40. The main chain of the monohydric alcohol has a carbon number of 12 to 30.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Cosmetics are applied to the skin or the like for the purpose of cleaning the body or enhancing the appearance. Organically modified clay minerals are sometimes added to cosmetics in the hope of imparting thickening properties to water-in-oil emulsion compositions (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 04-103508 Summary of the Invention [Problem to be solved by the invention]

[0004] A surfactant is necessary to prepare an emulsion cosmetic. In addition, the emulsion cosmetic may require thickening, such as a gel or cream. However, when an organically modified clay mineral is combined with a surfactant, the desired thickening may not be obtained. Therefore, an object of the present invention is to provide a water-in-oil emulsion cosmetic that contains an organically modified clay mineral and a surfactant and has thickening properties. [Means for solving the problem]

[0005] The present inventors have conducted extensive research into water-in-oil emulsion compositions that contain an organically modified clay mineral and a surfactant and have the desired thickening properties. As a result, they have surprisingly found that a water-in-oil emulsion cosmetic having thickening properties can be obtained by using an organically modified clay mineral in combination with a specific nonionic surfactant. The present invention is based on these findings. Thus, the present invention provides [1] (a) Organically modified clay minerals; (b) an ethylene oxide-added nonionic surfactant; (c) an oily component; (d) water; A creamy or gel-like water-in-oil emulsion composition comprising: (b) the water-in-oil emulsion composition, wherein the nonionic surfactant has a structure in which ethylene oxide is ether-bonded to one monohydric alcohol, the average number of moles of ethylene oxide added is 6 to 40, and the number of carbon atoms in the main chain of the monohydric alcohol is 12 to 30; [2] The water-in-oil emulsion composition according to [1], wherein the HLB value of the (b) nonionic surfactant is 10 or more. [3] (a) The water-in-oil emulsion composition according to [1] or [2], wherein the organically modified clay mineral is at least one selected from the group consisting of quaternium-18 hectorite and quaternium-90 bentonite; [4] The water-in-oil emulsion composition according to any one of [1] to [3], wherein the (b) ethylene oxide-added nonionic surfactant is at least one selected from the group consisting of POE (7) oleyl ether, POE (10) isostearyl ether, POE (20) behenyl ether, and POE (10) behenyl ether. [5] (a) 0.2 to 10 weight percent of an organically modified clay mineral; (b) 0.01 to 5% by weight of an ethylene oxide-added ester-based nonionic surfactant; (c) 15 to 70% by weight of an oil component; (d) 20 to 80% by weight of water; The water-in-oil emulsion composition according to any one of [1] to [4], [6] The water-in-oil emulsion composition according to any one of [1] to [5], which is a skin care cosmetic, a makeup cosmetic, a hair cosmetic, an antiperspirant cosmetic, or an ultraviolet protection cosmetic. Regarding. Effect of the Invention

[0006] According to the present invention, it is possible to provide a water-in-oil emulsion composition which contains an organically modified clay mineral and a surfactant and has a thickening property. The present invention will be described in detail below. In this specification, unless otherwise specified, the expression "A to B" for a numerical value A and a numerical value B is equivalent to "A or more and B or less." In other words, the expression "A to B" includes the numerical values ​​A and B at both ends. In such an expression, when a unit is added only to the numerical value B, the unit is also applied to the numerical value A. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] {Organically modified clay minerals; component a} The organically modified clay mineral that can be used in the present invention includes known clay minerals such as hectorite, montmorillonite, saponite, hectorite, bentonite, and smectite that have been treated with organic cations. The treatment method is preferably a method in which the organic cation is dissolved or dispersed in a suitable solvent, the clay mineral is immersed therein, filtered, and the residue is dried to prepare an organically modified clay mineral. The drying method includes a method of drying using a kneader, a method of drying using a spray dryer, and a method of freeze drying. When the method of drying using a spray dryer is adopted, the residue can be dispersed again in purified water or the like, and then sprayed and dried. The drying method is preferably a method of drying using a kneader from the viewpoint of cost. The organic cation used to modify the clay mineral may be one or more selected from ammonium compounds such as alkylammonium chlorides.

[0008] The (a) organically modified clay mineral in the present invention may be present in the form of an organically modified clay mineral in the water-in-oil emulsion composition. Therefore, in addition to adding the previously described organically modified clay mineral to the emulsion cosmetic, for example, an unmodified clay mineral and a cationic surfactant that is an organic cation capable of organically modifying the clay mineral may be separately blended, and the clay mineral may be organically modified in the system during the water-in-oil emulsion composition production process. In this case, the organically modified clay mineral will also be present in the obtained water-in-oil emulsion cosmetic.

[0009] Specific examples of organically modified clay minerals that can be used in the present invention include dimethyl distearyl ammonium hectorite (e.g., quaternium-18 hectorite), dimethyl distearyl ammonium bentonite (e.g., quaternium-18 bentonite, quaternium-90 bentonite), benzyl dimethyl stearyl ammonium hectorite, dioctadecyl dimethyl ammonium salt-modified montmorillonite, octadecyl dimethyl benzyl ammonium salt-modified montmorillonite, dihexadecyl dimethyl ammonium salt-modified montmorillonite, and dimethyl distearyl ammonium smectite. The organically modified clay minerals used in the present invention are commercially available, for example, as "Sumecton SAN-P" (chemical name: quaternium-18 hectorite), "Esben WV" (chemical name: quaternium-90 bentonite), "Bentone 38V" (chemical name: quaternium-18 hectorite), "Bentone 38VCG" (chemical name: quaternium-18 hectorite), "Bentone 34" (chemical name: quaternium-18 bentonite), "Bentone 27" (chemical name: benzyl dimethylstearyl ammonium hectorite), etc.

[0010] As the organically modified clay mineral used in the emulsion cosmetic of the present invention, quaternium-18 hectorite or quaternium-90 bentonite is preferred.

[0011] The (a) organically modified clay mineral may be used alone or in combination of two or more kinds in the water-in-oil emulsion composition of the present invention. The content of the component (a) in the water-in-oil emulsion composition is not particularly limited as long as the effects of the present invention can be obtained, but the lower limit is, for example, 0.001% by weight or more, more preferably 0.01% by weight or more, even more preferably 0.05% by weight or more, even more preferably 0.1% by weight or more, even more preferably 0.2% by weight or more, even more preferably 0.2% by weight or more, even more preferably 0.8% by weight or more, and even more preferably 1% by weight or more. The upper limit is, for example, 20% by weight or less, preferably 15% by weight or less, more preferably 12% by weight or less, even more preferably 10% by weight or less, and even more preferably 5% by weight or less. By being in the above content, good thickening properties can be obtained. In addition, the lower limit and upper limit of the content can be combined to form the range of the content of component (a).

[0012] {Ethylene oxide-added nonionic surfactant; component b} The ethylene oxide-added nonionic surfactant used in the present invention has a structure in which ethylene oxide is ether-bonded to one monohydric alcohol, the average number of moles of ethylene oxide added is 6 to 40 moles, and the number of carbon atoms in the main chain of the monohydric alcohol is 12 to 30. In this specification, the term "ethylene oxide-added nonionic surfactant" does not include those in which propylene oxide is added to an alcohol in addition to ethylene oxide.

[0013] (Monohydric alcohol) The monohydric alcohol may be a straight chain alcohol or a branched chain alcohol, and may be a saturated alcohol or an unsaturated alcohol. The main chain of the monohydric alcohol has 12 to 30 carbon atoms, preferably 14 to 26 carbon atoms, more preferably 14 to 24 carbon atoms, further preferably 16 to 22 carbon atoms, further preferably 18 to 22 carbon atoms, and most preferably 18 carbon atoms.

[0014] (Average number of moles of ethylene oxide added) The average number of moles of ethylene oxide added means the average amount of ethylene oxide ether-bonded to one monohydric alcohol in an ethylene oxide-added nonionic surfactant. The average number of moles of ethylene oxide added is 6 to 40, preferably 6 to 30, more preferably 7 to 26, even more preferably 7 to 20, even more preferably 7 to 16, and most preferably 7 to 10. When "POE(20)" is written in the following compounds, it means that the average number of moles of POE (polyethylene oxide) added in the surfactant is 20.

[0015] (HLB value) The HLB value of the ethylene oxide-added nonionic surfactant used in the present invention is, for example, 8 to 20, preferably 10 to 20, more preferably 10.5 to 17, further preferably 10.5 to 15, and most preferably 10.5 to 12. When the nonionic surfactant is a commercially available product, the HLB value of the nonionic surfactant is the HLB value described in the manufacturer's catalog.

[0016] The present inventors have surprisingly found that a water-in-oil emulsion composition exhibits good thickening properties when an organically modified clay mineral is combined with an ethylene oxide-added nonionic surfactant having a specific structure, particularly an ethylene oxide-added nonionic surfactant having a relatively high HLB value.

[0017] Specific examples of ethylene oxide-added nonionic surfactants that can be used in the present invention include, for example, POE(30) behenyl ether (trade name; NIKKOL BB-30), POE(20) behenyl ether (trade name; NIKKOL BB-20), POE(10) behenyl ether (trade name; NIKKOL BB-10), POE(7) oleyl ether (trade name; NIKKOL BO-7V), POE(10) isostearyl ether (trade name; EMALEX 1810), POE(10) cetyl ether (trade name; NIKKOL BC-10), POE(15) cetyl ether (trade name; NIKKOL BC-15), POE(20) cetyl ether (trade name; NIKKOL BC-20), POE(30) cetyl ether (trade name; NIKKOL BC-30), POE(40) cetyl ether (trade name; NIKKOL BC-40), POE(7) cetyl ether (trade name: EMALEX 107), POE(12) cetyl ether (trade name: EMALEX 112), POE(15) cetyl ether (trade name: EMALEX 115), POE(17) cetyl ether (trade name: EMALEX 117), POE(20) cetyl ether (trade name: EMALEX 120), and POE(10) 2-hexyldecyl ether (trade name: EMALEX 1610). POE(20) behenyl ether (trade name: NIKKOL BB-20), POE(10) behenyl ether (trade name: NIKKOL BB-10), POE(7) oleyl ether (trade name: NIKKOL BO-7V), and POE(10) isostearyl ether (trade name: EMALEX 1810) are preferred, and POE(7) oleyl ether (trade name: NIKKOL BO-7V) and POE(10) isostearyl ether (trade name: EMALEX 1810) are more preferred because they can ensure stability.

[0018] The (b) ethylene oxide-added nonionic surfactant may be used alone or in combination of two or more kinds in the water-in-oil emulsion composition of the present invention. The content of the component (b) in the water-in-oil emulsion composition is not particularly limited as long as the effects of the present invention can be obtained, but the lower limit is, for example, 0.001% by weight or more, more preferably 0.01% by weight or more, even more preferably 0.05% by weight or more, even more preferably 0.1% by weight or more, and even more preferably 0.2% by weight or more. The upper limit is, for example, 10% by weight or less, preferably 3% by weight or less, more preferably 2.5% by weight or less, even more preferably 2% by weight or less, and even more preferably 1.5% by weight or less. By being in the above content, thickening can be obtained. In addition, the lower limit and upper limit of the content can be combined to form the range of the content of component (b). The emulsion cosmetic of the present invention may further contain a surfactant other than component (b), so long as it maintains the effects of the present invention.

[0019] The weight ratio of the content of component (b) to the content of component (a) (component (b) / component (a)) is, for example, 0.01 to 5.0, 0.05 to 2.5, 0.08 to 2.0, or 0.1 to 1.0.

[0020] 《Oily component; component c》 The water-in-oil emulsion composition of the present invention contains an oily component as the main component of the oil phase component. The oily component is not particularly limited, and examples thereof include ester oil, hydrocarbon oil, animal and vegetable oil, aliphatic alcohol, higher fatty acid, silicone or silicone derivative. The water-in-oil emulsion composition of the present invention can be used by mixing one or more of the oily components contained therein.

[0021] Examples of the ester oil include isopropyl myristate, butyl myristate, isopropyl palmitate, butyl stearate, ethyl stearate, ethyl oleate, ethyl linoleate, isopropyl linoleate, cetyl caprylate, hexyl laurate, decyl myristate, myristyl myristate, cetyl myristate, cetyl palmitate, stearyl stearate, decyl oleate, oleyl oleate, cetyl ricinoleate, isostearyl laurate, isotridecyl myristate, 2-hexyldecyl myristate, myrist ... Isostearyl myristate, 2-octyldodecyl myristate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, isostearyl palmitate, 2-ethylhexyl stearate, 2-hexyldecyl stearate, isodecyl oleate, 2-octyldodecyl oleate, 2-octyldodecyl ricinoleate, ethyl isostearate, isopropyl isostearate, cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, hexyl isostearate, diethyl 2-ethylhexanoate Ethylene glycol, ethylene glycol dioleate, propylene glycol dicaprylate, propylene glycol dicaprylate, propylene glycol dicaprate, propylene glycol dioleate, neopentyl glycol dicaprate, neopentyl glycol di-2-ethylhexanoate, glyceryl tricaprylate, glyceryl tri-2-ethylhexanoate, glyceryl tricaprylate, glyceryl tri-undecylate, glyceryl triisopalmitate, glyceryl triisostearate, tri-2-ethylhexanoic acid Trimethylolpropane, trimethylolpropane triisostearate, pentaerythritol tetra 2-ethylhexanoate, pentaerythritol tetramyristate, pentaerythritol tetraisostearate, dipentaerythritol fatty acid ester (1), 2-octyldodecyl neopentanoate, 2-hexyldecyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, 2-ethylhexyl isononanoate, 2-hexyldecyl dimethyloctanoate, 2-octyldodecyl dimethyloctanoate, 2-ethylhexyl isopalmitate,2-Hexyldecyl isostearate, isostearyl isostearate, 2-octyldodecyl isostearate, lauryl lactate, myristyl lactate, cetyl lactate, 2-octyldodecyl lactate, triethyl citrate, acetyl triethyl citrate, acetyl tributyl citrate, tri-2-ethylhexyl citrate, triisocetyl citrate, tri-2-octyldodecyl citrate, diisostearyl malate, 2-ethylhexyl hydroxystearate, di-2-ethylhexyl succinate, diisopropyl adipate, diisobutyl adipate, di-2-ethyl adipate Examples of the hydroxystearate include isocetyl 12-stearoyl hydroxystearate, isocetyl 12-stearoyl hydroxystearate, stearyl 12-stearoyl hydroxystearate, and isostearyl 12-stearoyl hydroxystearate.

[0022] Examples of the hydrocarbon oil include ozokerite, α-olefin oligomer, light isoparaffin, light liquid isoparaffin, synthetic squalane, vegetable squalane, squalane, ceresin, paraffin, polyethylene powder, polybutene, liquid isoparaffin, liquid paraffin, squalene, pristane, petrolatum, and microcrystalline wax.

[0023] Examples of the animal and vegetable oils include avocado oil, corn oil, evening primrose oil, persic oil, camellia oil, castor oil, safflower oil, cinnamon oil, almond oil, soybean oil, soybean germ oil, rapeseed oil, high oleic rapeseed oil, corn oil, sesame oil, perilla oil, linseed oil, peanut oil, safflower oil, high oleic safflower oil, sunflower oil, mid oleic sunflower oil, high oleic sunflower oil, cottonseed oil, Examples of such oils include grape seed oil, macadamia nut oil, hazelnut oil, pumpkin seed oil, walnut oil, camellia oil, tea seed oil, perilla oil, borage oil, olive oil, rice bran oil, wheat germ oil, palm oil, palm kernel oil, coconut oil, cocoa butter, egg yolk oil, mink oil, beef tallow, lard, chicken fat, milk fat, fish oil, seal oil, and algae oil, as well as fractionated oils, hardened oils, and interesterified oils thereof.

[0024] Examples of the aliphatic alcohol include alcohols having 12 to 22 carbon atoms (so-called higher alcohols), such as linear saturated alcohols (e.g., lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, or behenyl alcohol), branched saturated alcohols (e.g., isostearyl alcohol or octyldodecanol), or unsaturated alcohols (e.g., oleyl alcohol).

[0025] Examples of the higher fatty acid include linear saturated fatty acids (e.g., lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid), branched saturated fatty acids (e.g., isostearic acid), unsaturated fatty acids (e.g., oleic acid, linoleic acid, linoleic acid, undecylenic acid, eicosapentaenoic acid, docosahexaenoic acid), tall acid, and lanolic acid.

[0026] Examples of the silicone or silicone derivative include methylpolysiloxane, dimethylsiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, methylaminopropylsiloxane, aminoethylaminopropylmethylsiloxane, silicone rubber, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpolysiloxane, highly polymerized methylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, decamethylpolysiloxane, and methyl(aminopropyl)siloxane.

[0027] The content of the component c in the water-in-oil emulsion composition is not particularly limited as long as the effects of the present invention are obtained, but the lower limit is, for example, 15% by weight or more, more preferably 20% by weight or more, even more preferably 22% by weight or more, even more preferably 25% by weight or more, and even more preferably 30% by weight or more. The upper limit is, for example, 70% by weight or less, preferably 60% by weight or less, more preferably 55% by weight or less, even more preferably 50% by weight or less, and even more preferably 45% by weight or less. The lower limit and upper limit of the content can be combined to form the range of the content of component c.

[0028] 《Water; component d》 The water-in-oil emulsion composition of the present invention contains water as the main component of the aqueous phase. The content of the component d in the water-in-oil emulsion composition is not particularly limited as long as the effects of the present invention are obtained, but the lower limit is, for example, 20% by weight or more, more preferably 25% by weight or more, even more preferably 30% by weight or more, even more preferably 35% by weight or more, and even more preferably 40% by weight or more. The upper limit is, for example, 80% by weight or less, preferably 70% by weight or less, more preferably 65% ​​by weight or less, even more preferably 60% by weight or less, even more preferably 55% by weight or less, and even more preferably 50% by weight or less. The lower limit and upper limit of the content can be combined to form the range of the content of component d.

[0029] Cosmetics The water-in-oil emulsion composition of the present invention can be, but is not limited to, skin care cosmetics such as lotions, creams, cleansing agents, packs, massage agents, detergents, deodorants, and hand creams; makeup cosmetics such as makeup bases, foundations, blushers, eye colors, mascara, eyeliners, eyebrow products, and lipsticks; hair cosmetics such as rinses, treatments, and setting agents; antiperspirant cosmetics; and ultraviolet protection cosmetics such as sunscreens, sunscreen lotions, and sunscreen creams. The water-in-oil emulsion composition of the present invention is a cream- or gel-like water-in-oil emulsion composition. "Gel-like" means that even if taken out of a container and placed directly on a table in a 20°C environment, it will not spread and will maintain its shape for a few seconds (e.g., 2 seconds). "Cream-like" means that, unlike a liquid, it has a certain degree of viscosity (e.g., 100 mPa·s or more at 20°C, preferably 300 mPa·s or more, more preferably 500 mPa·s or more) in a 20°C environment. A water-in-oil emulsion composition having both gel-like and cream-like properties corresponds to a gel-like water-in-oil emulsion composition, and also corresponds to a cream-like water-in-oil emulsion composition.

[0030] In addition to the above essential components, the water-in-oil emulsion composition of the present invention can appropriately contain other components that are usually incorporated into cosmetics, provided that the effects of the present invention are not impaired. Examples of other components include moisturizers (e.g., trimethylglycine, concentrated glycerin, sorbitol, xylitol, hyaluronic acid, sodium pyrrolidone carboxylate, ceramides, and hydrolyzed keratin), colorants (e.g., pigments or dyes), pearlescent agents (e.g., glycol distearate or ethylene glycol distearate), salts (e.g., sodium chloride), plant extracts, preservatives, vitamins, fragrances, ultraviolet absorbers, antioxidants, moisturizers, chelating agents, and pH adjusters (e.g., citric acid or tartaric acid). EXAMPLES

[0031] The present invention will be described in detail below with reference to examples, but the scope of the present invention is not limited thereto. Unless otherwise specified, % indicates % by weight.

[0032] 《Reference examples 1~17》 In Reference Examples 1 to 17, as a preliminary experiment, an oil component, an organic modified clay mineral, and various nonionic surfactants were mixed in the composition shown in Tables 2 and 3, and it was visually confirmed whether the oil component had a thickening effect. The details of the organic modified clay mineral and the nonionic surfactant used in the examples are as follows.

[0033] 《Organically modified clay minerals》 · Esben WV-60; Quaternium-90 Bentonite · Sumecton SAN-P; Quaternium-18 Hectorite Benton 38 VCG; Quaternium-18 Hectorite

[0034] <Nonionic surfactants> [Table 1] Furthermore, Esben, Sumecton, NIKKOL, EMALEX, and Cosmol are all registered trademarks.

[0035] [Table 2]

[0036] [Table 3]

[0037] In Reference Examples 1 to 7, in which NIKKOL BB-20, NIKKOL BB-10, NIKKOL BO-7V, or EMALEX 1810 was used as component b, thickening properties were confirmed. In the other Reference Examples in which other nonionic surfactants were used, thickening properties were not confirmed. As component a, Esben WV-60 and Sumecton SAN-P were used. It was confirmed that either of them provided thickening properties.

[0038] Examples 1 to 4 In Examples 1 to 4, water-in-oil (W / O) creams were prepared by mixing water, an oil component, an organically modified clay mineral, and a nonionic surfactant according to the component composition shown in Table 4. The thickening property of the W / O cream, the formation of a uniform W / O cream, and the stability of the W / O cream (after one week) were visually confirmed.

[0039] [Table 4]

[0040] All of Examples 1 to 4 showed thickening properties. Furthermore, all of Examples 1 to 4 formed a W / O cream emulsion without separation of the oil phase and the water phase. However, in Example 1 or 2, in which NIKKOL BB-20 or NIKKOL BB-10 was used, the aqueous phase and the oil phase separated one week after mixing. In Example 3 or 4, in which NIKKOL BO-7V or EMALEX 1810 was used, the aqueous phase and the oil phase did not separate even one week after mixing, and the compositions were stable.

[0041] Examples 5 to 12 In Examples 5 to 12, water-in-oil (W / O) creams were prepared by mixing water, an oil component, an organically modified clay mineral, and a nonionic surfactant according to the component composition shown in Table 5. The thickening of the W / O cream, the formation of a uniform W / O cream, and the stability of the W / O cream (after one week) were visually confirmed.

[0042] [Table 5]

[0043] All of Examples 5 to 12 showed thickening. Furthermore, all of Examples 5 to 12 formed a W / O cream emulsion without separation of the oil phase and the water phase. However, in Example 12, in which NIKKOL BO-7V was added at 3 wt%, the water phase and the oil phase separated one week after mixing. In Examples 5 to 9 and 11, in which NIKKOL BO-7V was added at 0.05 to 2 wt%, the water phase and the oil phase did not separate even one week after mixing, and the mixture was stable.

[0044] Examples 13 to 19 In Examples 13 to 19, water-in-oil (W / O) creams were prepared by mixing water, an oil component, an organically modified clay mineral, and a nonionic surfactant according to the component composition shown in Table 6. The thickening of the W / O cream, the formation of a uniform W / O cream, and the stability of the W / O cream (after one week) were visually confirmed.

[0045] [Table 6]

[0046] All of Examples 13 to 19 showed thickening. In addition, all of Examples 13 to 19 formed a W / O cream emulsion without separation of the oil phase and the water phase. In addition, in Examples 13 to 19, the water phase and the oil phase did not separate even one week after mixing, and the mixtures were stable.

[0047] Examples 20 to 22 In Examples 20 to 22, a water-in-oil (W / O) gel foundation was prepared by mixing water, an oil component, an organically modified clay mineral, and a nonionic surfactant according to the composition shown in Table 7. The thickening of the W / O gel, the formation of a uniform W / O gel, and the stability of the W / O gel (after one week) were visually confirmed.

[0048] [Table 7]

[0049] All of the emulsions in Examples 20 to 22 were in a gel state. In addition, all of the emulsions in Examples 20 to 22 formed gel-like W / O emulsions without separation of the oil phase and the water phase. In addition, in Examples 20 to 22, the water phase and the oil phase did not separate even one week after mixing, and the emulsions were stable. [Industrial Applicability]

[0050] According to the present invention, it is possible to provide a water-in-oil type emulsion composition which contains an organically modified clay mineral and a surfactant and has a thickening property.

Claims

1. (a) an organically modified clay mineral; (b) an ethylene oxide-added nonionic surfactant; (c) an oil component; and (d) water; A creamy or gel-like water-in-oil emulsion composition comprising: (b) The water-in-oil emulsion composition, wherein the nonionic surfactant has a structure in which ethylene oxide is ether-bonded to one monohydric alcohol, the average number of moles of ethylene oxide added is 6 to 40, and the number of carbon atoms in the main chain of the monohydric alcohol is 12 to 30.

2. 2. The water-in-oil emulsion composition according to claim 1, wherein the HLB value of the nonionic surfactant (b) is 10 or more.

3. 3. The water-in-oil emulsion composition according to claim 1 or 2, wherein the (a) organically modified clay mineral is at least one selected from the group consisting of quaternium-18 hectorite and quaternium-90 bentonite.

4. 3. The water-in-oil emulsion composition according to claim 1 or 2, wherein the (b) ethylene oxide-added nonionic surfactant is at least one selected from the group consisting of POE (7) oleyl ether, POE (10) isostearyl ether, POE (20) behenyl ether, and POE (10) behenyl ether.

5. (a) 0.2 to 10% by weight of an organically modified clay mineral; (b) 0.01 to 5% by weight of an ethylene oxide-added ester-based nonionic surfactant; (c) 15 to 70% by weight of an oil component; (d) 20 to 80% by weight of water; The water-in-oil emulsion composition according to claim 1 or 2, comprising:

6. 3. The water-in-oil emulsion composition according to claim 1, which is a skin care cosmetic, a makeup cosmetic, a hair cosmetic, an antiperspirant cosmetic, or an ultraviolet protection cosmetic.

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