Oil dispersion composition

Abstract

To provide an oil dispersion composition comprising large oiliness particles for preventing reduction of obstruction property by permeation to a skin, capable of applying in a uniform manner, an oiliness component to a skin groove and cristae cutis in application to a skin, controlling arrangement of the oiliness component and an aqueous component after application for preventing inhibition of permeation of the aqueous component into the skin by the oiliness component in the composition, capable of simultaneously achieving skin obstruction property and moisture supply into the skin, a cosmetic, and a production method of an oil dispersion composition.SOLUTION: There is provided an oil dispersion composition comprising: a component (A) which is one or two or more kinds of components selected from phosphatide, and a surfactant whose HLB is 5.5-12; a component (B) which is solid oil or semi-solid oil component; a component (C) which is an oil phase including liquid oil and formed of solid oiliness particles; and a component (D) which is a water phase including water expansive clay mineral, in which an average particle diameter of the oiliness particles is 20 μm or greater and less than 300 μm.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a composition in which an oil phase consisting of solid oil particles containing a specific component is dispersed in an aqueous phase, and is characterized in that the oil component in the composition can be uniformly applied to the skin when applied to the skin while having large oil particles for the purpose of preventing a decrease in occlusion due to penetration into the skin.Furthermore, the present invention relates to an oil dispersion composition in which the arrangement of the oil component and the aqueous component after application is controlled so that the oil component in the composition does not hinder the penetration of the aqueous component in the composition into the skin. [Background technology]

[0002] Cosmetics are required to have a moisturizing effect, that is, to provide moisture to the skin and to have skin occlusion by oily ingredients to suppress water evaporation from the skin, and emulsions containing aqueous and oily ingredients have been used as a formulation that satisfies both of these requirements. However, emulsions are thermodynamically unstable systems, and in order to prevent the oily particles from coalescing, they are usually stabilized by heating the oily and aqueous phases to dissolve them, lowering the interfacial tension at the water-oil interface using a surfactant, and reducing the oily particles by mechanical energy. Reducing the size of the oily particles has also been done to increase the penetration of the oily ingredients into the skin, softening the skin's feel, and giving the user a sense of moisturization.

[0003] In order to maximize the moisturizing effect of applying an emulsion to the skin, it is desirable for the aqueous components in the formulation to penetrate into the skin, and for the oily components in the formulation to block the skin surface and suppress water evaporation. In this regard, general emulsions use surfactants to improve the compatibility of the aqueous components with the skin, but since the skin is originally lipophilic and has a high affinity with the oily components, the oily components spread on the skin beforehand may prevent the aqueous components from penetrating the skin. In addition, since the oily particles are made small for stabilization and usability, the oily components easily penetrate into the skin, and the oil remaining on the skin surface is reduced, making it impossible to obtain sufficient skin occlusion. Therefore, in order to increase skin occlusion, it was necessary to increase the size of the oily particles and reduce the penetration of the oily components.

[0004] In an attempt to increase the size of oil particles in an emulsion, it has been reported that an oil dispersion composition having oil particles with an average particle size of 100 μm or more can be obtained by dispersing an oil phase containing an amphiphilic substance that is solid at room temperature in an aqueous phase (Patent Document 1). The invention relates to an oil capsule containing an oil component as a content composition, and aims to achieve both stable encapsulation of the oil component and a good feeling of use, but does not aim to block the skin surface with the oil component. Therefore, no consideration was given at all to the residual nature of the oil component on the skin surface or the uniformity of the applied film sufficient for blockage. Furthermore, since the oil particles are solid, the opportunity for the aqueous phase to come into contact with the skin is increased compared to general emulsions, but since no surfactant is blended into the aqueous phase, good skin compatibility of the aqueous component with the skin cannot be expected.

[0005] Similarly to Patent Document 1, Patent Document 2 discloses an oil composition containing solid oil in the oil phase. The invention is based on the discovery of a manufacturing method that can stably disperse an oil phase containing solid oil as fine particles in an aqueous phase without adding a surfactant, and relates to an oil fine dispersion composition. When the fine dispersion composition of the invention is applied to the skin as an external agent, the oil component that forms the fine particles does not inhibit the penetration of the aqueous component into the skin, so that it can initially give the skin a fresh feeling, and gradually the oil particles are crushed and the oil component covers the entire skin, so that it is said that it can finally bring a moist feeling to the skin. However, the oil particles are finely dispersed, and due to the ease of penetration, the oil component cannot be expected to remain on the skin surface. In addition, the oil particles are crushed and the oil component covers the entire skin faster than the penetration of the aqueous component into the skin, so most of the water evaporates into the air and is lost without penetrating the skin.

[0006] In other words, no oil dispersion composition was known that had large oily particles to prevent a decrease in occlusiveness due to penetration into the skin, while uniformly covering the skin with oily components after application and at the same time enhancing the penetration of aqueous components into the skin.

[0007] [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2003-73230 A [Patent Document 2] JP 2006-256971 A Summary of the Invention [Problem to be solved by the invention]

[0009] In view of the above circumstances, the present invention aims to provide an oil dispersion composition which has large oily particles for the purpose of preventing a decrease in occlusiveness due to penetration into the skin, while allowing the oily component to be spread evenly over the skin when applied to the skin, and in which the arrangement of the oily component and the aqueous component after application is controlled so that the oily component in the composition does not inhibit the penetration of the aqueous component into the skin. [Means for solving the problem]

[0010] As a result of intensive research conducted by the present inventors in order to achieve the above object, Component (A): One or more selected from phospholipids and surfactants with HLB of 5.5 to 12 Component (B): solid oil and / or semi-solid oil Component (C): Liquid oil an oil phase consisting of solid oily particles comprising Component (D): Water-swellable clay minerals and an aqueous phase comprising The above problem was solved by providing an oil dispersion composition in which the average particle size of the oily particles is 20 μm or more and less than 300 μm. Effect of the Invention

[0011] By taking the above measures, while having large oily particles for the purpose of preventing a decrease in occlusiveness due to penetration into the skin, when applied to the skin, the oily component adheres evenly to the skin grooves and skin mounds on the skin surface, and the aqueous and oily components are controlled in an arrangement that adheres to the skin surface in a mixed state so that both the oily and aqueous components in the composition do not adhere to the skin surface together and inhibit the penetration of the aqueous component into the skin, thereby simultaneously satisfying skin occlusiveness and supplying moisture to the skin, and achieving a high moisturizing effect. [Brief description of the drawings]

[0012] [Figure 1] 3 shows microscope photographs of the compositions of Example 1 and Comparative Example 3 containing a red pigment when applied to the skin. [Diagram 2]Fluorescence microscope photographs of the compositions of Example 1 and Comparative Example 7, each of which contains an oil-soluble fluorescent dye and a water-soluble fluorescent dye, applied to artificial leather. BEST MODE FOR CARRYING OUT THEINVENTION

[0013] The oil dispersion composition of the present invention is characterized in that it comprises an oil phase which is solid oil particles containing specific components (A), (B) and (C) and an aqueous phase which contains specific component (D), and the oil phase is dispersed in the aqueous phase as oil particles having an average particle size of 20 μm or more and less than 300 μm. Note that while the oil phase of a general emulsion is liquid, the oil phase of the present invention is solid at room temperature (25° C.) and does not exhibit fluidity.

[0014] Regarding the dispersion method in the present invention, a preferred method is to disperse the oil phase in the aqueous phase by applying an external force at a temperature below the slip melting point of the oil phase. This has the advantage that oily particles of the desired particle size can be easily obtained, unlike general emulsion compositions which are prepared by applying an external force to an oil phase in solution.

[0015] In the present invention, HLB is a hydrophilic-lipophilic balance (hydrophilic-lipophilic ratio), which is a value that indicates the degree of affinity of a surfactant to water and oil (organic compounds insoluble in water). In this specification, if the HLB (Hydrophilic-Lipophilic Balance) is not specified in the manufacturer's documents, it is calculated according to the following Griffin formula.

[0016]

number

[0017] The phospholipid of the component (A) used in the present invention is oil-soluble and has surface activity, and may be natural or chemically synthesized. The origin of the phospholipid is not particularly limited, but hydrogenated phospholipids and lysophospholipids derived from egg yolk or soybean are suitable. In addition, hydrogenated lecithin, which is a hydrogenated phospholipid, is preferably used, and is preferred from the viewpoint of obtaining an oil dispersion composition with excellent stability and usability.

[0018] Of the surfactants having an HLB of 5.5 to 12 in the component (A) used in the present invention, those having a hydrophilic lipophilic balance (HLB) of 5.5 to 12 are preferred, and those having an HLB of 9 to 12 are even more preferred. As long as the HLB of the surfactant is within this range, there are no particular limitations, and specific examples include sorbitan fatty acid esters, sucrose fatty acid esters, glycerin mono fatty acid esters, polyglycerin fatty acid esters, polyoxyalkylene fatty acid esters, and the like.

[0019] The component (A) may be blended alone or in combination of two or more kinds.

[0020] In the oil dispersion composition of the present invention, the blending amount of component (A) is preferably 0.1 to 5 mass%, more preferably 0.5 to 2 mass%, and within this range, the oil dispersion composition has excellent stability and usability.

[0021] The component (B) used in the present invention refers to an oily component that is solid or semi-solid at room temperature (25°C). Although not particularly limited, the solid oil may be a hydrocarbon solid oil, an ester solid oil, or the like. Specifically, examples of the solid oil include hydrocarbon solid oils such as paraffin wax, microcrystalline wax, polyethylene wax, and ceresin, ester solid oils such as hydrogenated jojoba oil, beeswax, carnauba wax, and candelilla wax, and animal and vegetable oils such as lanolin, Japan wax, shea butter, cacao butter, hydrogenated castor oil, hydrogenated coconut oil, and palm oil. Among them, paraffin and beeswax, which have a high melting point, increase the dispersibility of the oily component and reduce the fluidity of the oily component, enabling uniform application on the skin. In addition, the semi-solid oil may be a hydrocarbon semi-solid oil, an ester semi-solid oil, or an ether semi-solid oil. Examples of such oils include hydrocarbon semi-solid oils such as petrolatum, dipentaerythritol fatty acid esters, hydrogenated castor oil fatty acid esters, cholesterol fatty acid esters, phytosterol fatty acid esters, hydrogenated coconut oil, hydrogenated palm oil, and other hydrogenated vegetable oils. Of these, petrolatum is preferred, as it provides a softer film feel than solid oils and allows the production of an oil dispersion composition that is easily absorbed into the skin.

[0022] The component (B) may be blended alone or in combination of two or more kinds.

[0023] In the oil dispersion composition of the present invention, the blending amount of component (B) is preferably 0.1 to 15 mass%, more preferably 1 to 10 mass%, and within this range, the coating film of the oily component provides an excellent moisturizing feeling.

[0024] The component (C) used in the present invention refers to an oil component that has fluidity at room temperature (25° C.). As long as it can dissolve the solid oil or semi-solid oil of component (B), there is no particular limitation, and examples thereof include olive oil, avocado oil, macadamia nut oil, evening primrose oil, jojoba oil, rapeseed oil, castor oil, safflower oil, cottonseed oil, rice bran oil, sunflower oil, almond oil, corn oil, linseed oil, medusafoam oil, squalene, squalane, vegetable squalane, jojoba alcohol, liquid paraffin, polybutene, hydrogenated polyisobutene, cetyl ethylhexanoate, pentaerythrityl tetraethylhexanoate, cetyl octanoate, pentaerythryl tetraoctanoate, diisobutyl adipate, 2-hexyldecyl sebacate, glycerin trioctanoate, glycerin triisopalmitate, and malic acid. Examples of the suitable glyceryl esters include diisostearyl, 2-hexyldecyl myristate, myristyl myristate, octyldodecyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, butyl stearate, isocetyl stearate, decyl oleate, oleyl oleate, myristyl lactate, cetyl lactate, 2-ethylhexyl succinate, 2-hexyldecyl adipate, dimethicone, dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, glycerin trioctanoate, glycerin triisopalmitate, triglycerin, oleic acid, and isostearic acid. Among these, pentaerythrityl tetraethylhexanoate is preferred from the viewpoint of good compatibility with the skin when applied to the skin.

[0025] The component (C) may be blended alone or in combination of two or more kinds.

[0026] The amount of component (C) is not particularly limited, but the total amount of components (B) and (C) is preferably 0.5% by mass or more and 50% by mass or less, and more preferably 10% by mass or more and 30% by mass or less, of the entire oil dispersion composition of the present invention. Furthermore, it is even more preferable if the ratio of the amount of component (C) to the amount of component (B) is 1 or more. In this range, the stability of the oil dispersion composition is very good, and further, when applied to the skin, the oily particles are easily crushed, and the application property is excellent.

[0027] The water-swellable clay mineral of component (D) used in the present invention is known as a layered inorganic additive. Although not particularly limited, specific examples include smectites such as bentonite, montmorillonite, beidellite, nontronite, saponite, hectorite, sauconite, and stevensite, and may be either natural or synthetic. Among them, it is preferable to include hectorite silicic acid (Na / Mg) or fluorosilicic acid (Na / Mg), saponite silicic acid (Al / Mg), and bentonite, from the viewpoint that the arrangement of oil and moisture after application of the composition can be controlled and an oil dispersion composition excellent in moisture supply can be obtained.

[0028] The component (D) may be blended alone or in combination of two or more kinds.

[0029] In the oil dispersion composition of the present invention, the blending amount of component (D) is preferably 0.5 to 5% by mass, and within this range, the composition spreads well, blends well with the skin, and is excellent in usability.

[0030] The oil dispersion composition of the present invention may be water-based, emulsion-based, or pigment dispersion-based, so long as the effects of the present invention can be obtained. If it is water-based, a liquid cosmetic with a fresh feeling can be prepared, and if it is emulsion-based, various feelings can be produced from milky to creamy depending on the type and viscosity of the oil. If it is pigment dispersion-based, it can be applied to makeup cosmetics that take advantage of the high moisturizing effect, which is a characteristic of the present formulation.

[0031] The oil dispersion composition of the present invention can also be appropriately blended with components normally used in cosmetics, such as oil-based components, surfactants other than component (A), aqueous components, UV absorbers, moisturizers, thickeners, anti-fading agents, antioxidants, defoamers, cosmetic ingredients, preservatives, fragrances, etc., as necessary, within qualitative and quantitative ranges that do not impair the effects of the present invention.

[0032] The method for producing the oil dispersion composition of the present invention is characterized by including, for example, a step of uniformly mixing an oil phase containing components (A), (B) and (C) at a temperature higher than the melting point of component (B) and then cooling to a temperature lower than the ascending melting point of the oil phase; a step of dispersing component (D) in an aqueous phase, heating to fully swell the mixture, and then cooling to a temperature lower than the ascending melting point of the oil phase; and a step of mixing the oil phase and the aqueous phase to disperse the oil phase in the aqueous phase. By mixing and dispersing at a temperature lower than the ascending melting point of the oil phase, an oil dispersion composition having a desired average particle size can be prepared without forming suspended matter or aggregates of the oily components.

[0033] The slip melting point of the oil phase in the present invention is the temperature at which the oil phase, which is solid at 25°C, begins to dissolve due to an increase in temperature. If the temperature at the time of mixing and dispersing the oil phase and the water phase is equal to or lower than the slip melting point of the oil phase, the oil phase is not emulsified but dispersed to prepare large particles. The slip melting point was measured by heating the oil phase containing components (A), (B) and (C) to 90°C or higher while stirring until it was completely dissolved, and then sampling a 1 cm length into a hematocrit tube. The sample was then left in an incubator at 20°C for 4 hours, and the slip melting point was measured according to the second melting point measurement method of the cosmetic raw materials standard.

[0034] In the present invention, "mixing" means shear mixing or stirring mixing. Examples of shear mixing include high-speed shear dispersion devices such as homomixers and homodispersers, and examples of stirring mixing include stirring mixing devices such as propeller mixers and paddle mixers. The stirring speed varies depending on the production scale, but when 200 g of bulk is shear mixed using a mixer (product name: TK Robomix, manufactured by Primix Corporation) equipped with a homomixer MARK2-2.5 type, the average particle size of the oily particles can be adjusted to 20 μm or more by processing at a rotation speed of about 1400 to 4000 rpm for 1 minute. In addition, when 100 g of bulk is stirred and mixed using a mixer (product name: Three-One Motor, manufactured by Shinto Scientific Co., Ltd.) equipped with a stirring paddle, the average particle size of the oily particles can be adjusted to 20 μm or more by processing at a rotation speed of about 100 to 300 rpm for 15 minutes.

[0035] The average particle size of the oil particles in the oil dispersion composition of the present invention is preferably 20 to 300 μm, more preferably 40 to 200 μm immediately after production. Such an oil dispersion composition is particularly excellent in usability, and when applied to the skin, it is excellent in uniform application of the oily component onto the skin. On the other hand, if the average particle size of the oil particles exceeds 300 μm, the oily component cannot be uniformly applied onto the skin, and the usability of the applied surface is not good. In addition, the average particle size in the present invention means the volume average diameter of each oily particle.

[0036] In the present invention, the shape of the oily particles is not particularly limited, and even if the shape is irregular, there is no problem in terms of stability and usability. In addition, depending on the conditions of shear mixing during shearing, there is no problem even if the oily particles are partially microparticulated. EXAMPLES

[0037] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto. The blend amounts are shown in mass % unless otherwise specified.

[0038] Oil dispersion compositions were prepared by the following methods, and the effects and properties of the compositions shown in Tables 1 to 4 were confirmed. (Method of preparing oil dispersion composition) Based on each formulation in Tables 1 to 4, component (D) or (D') was added to water and thoroughly dispersed with a disperser, which was then heated to 80°C to dissolve, and the disperser was stopped and the mixture was cooled to 30°C while being stirred by hand to obtain the aqueous phase. On the other hand, components (A), (B) and (C) were mixed and dissolved at 80°C, and cooled to 30°C except for Comparative Example 1 (Cooled to 60°C in Comparative Example 1) to obtain the oil phase. A total of 100g of the aqueous phase and the oil phase was placed in a 200mL beaker, and mixed and stirred for 15 minutes at 300 rpm using a three-one motor equipped with a stirring paddle with an outer diameter of 6 cm and an inner diameter of 4 cm, to obtain an oil dispersion composition.

[0039] <Method of measuring average particle size> The average particle size was measured by diluting the oil dispersion composition with the aqueous phase of each formulation to a concentration where individual oil particles could be observed (for example, diluting the composition:aqueous phase=1:4), spreading it on a slide glass with a doctor blade (coating thickness 300 μm), and observing it at a magnification of 40 times. From the obtained optical microscope photograph, the volume average diameter was calculated based on the Feret diameters of 50 or more oil particles that could be observed randomly selected, and this was taken as the average particle size.

[0040] <Evaluation of average particle size> In order to evaluate the effect of different average particle sizes on the properties of the oil dispersion composition, the stirring method during preparation was changed only for Table 1. The results of evaluating the coating uniformity of the oil dispersion compositions prepared by each manufacturing method are shown in Table 1. For each evaluation item, stirring with a three-one motor equipped with a stirring paddle was performed for 15 minutes, and stirring with a homomixer was performed for 1 minute.

[0041] <Evaluation of coating uniformity> The uniformity of application of each composition on the skin was evaluated by applying each composition, which was prepared by blending a red dye in the oil phase of the formulation, to the inside of the forearm, observing it after 30 minutes with a digital microscope (product name: VHX-5000, manufactured by Keyence Corporation), and evaluating it based on the following evaluation criteria. A representative example is shown in Figure 1. (Evaluation Criteria) ◎: The product is applied evenly to the skin grooves and mounds, with no unevenness. ○: There is little localization in the skin grooves, and most of the application is to the skin mounds. △: Mostly localized in the skin grooves, little applied to the skin mounds. ×: Localized in the skin groove, with uneven distribution.

[0042] [Table 1]

[0043] As is clear from Table 1, although there was a difference in the average particle size between Examples 1 and 2 due to the different stirring methods, both oil dispersion compositions with a particle size of 20 μm or more were obtained, and the application uniformity on the skin was excellent. On the other hand, in Comparative Example 1, the composition was strongly stirred and mixed at a temperature exceeding the ascending melting point of the oil phase, resulting in a composition with an average particle size of less than 20 μm, which weakened the effect of the solid oil in reducing the fluidity of the oily component, and resulted in poor application uniformity.

[0044] [Table 2]

[0045] As is clear from Table 2, the component (B) was able to obtain the desired oil dispersion composition regardless of the type (Examples 3 to 5). The component (C) was able to obtain the desired oil particles whether silicone oil, hydrocarbon, or ester oil was used (Examples 6 to 8). If the oil-soluble surfactant, which is the component (A), was hydrogenated lecithin (Example 1) or a surfactant with HLB = 5.5 to 12 (Examples 9 to 11), an oil dispersion composition with an average particle size of 20 μm or more could be prepared. On the other hand, when the component (A) was a surfactant with HLB = 5.5 or lower (Comparative Example 2), the dispersibility was low and the oil phase aggregated. Conversely, when the component (A) was a surfactant with HLB = 12 or higher (Comparative Example 3), the dispersibility was too high, resulting in small particles with an average particle size of less than 20 μm, and the desired oil dispersion composition could not be obtained. As a representative example of coating uniformity, the observation images of Example 1 and Comparative Example 3 are shown in Figure 1. Example 1 is coated uniformly without bias on the skin grooves and skin mounds, whereas Comparative Example 3 is localized in the skin grooves and cannot be coated uniformly. On the other hand, Comparative Example 4, which contains a higher alcohol that is not a surfactant but an amphipathic substance, was not able to obtain the desired oil dispersion composition because the oil phase aggregated and did not disperse.

[0046] <Evaluation of moisturizing sensation> A panel of 10 experts used the samples and judged the moisturizing feeling (moist feeling) after 6 hours according to the following criteria. (Evaluation Criteria) ◎: 8 to 10 people answered that they felt moisturized. ○: 5 to 7 people answered that they felt moisturized. △: 2 to 4 people answered that they felt moisturizing. ×: 0 to 1 people answered that they felt moisturizing.

[0047] <Checking oil and water placement> The oil-water configuration is the three-dimensional configuration of the oily and aqueous components formed on the artificial leather when the dispersion state of the oily components of the composition changes during the process of applying the composition to the artificial leather. The oil-water configuration of each of the following compositions was confirmed. The oil-water configuration of each composition was determined by applying each composition, which was prepared by blending an oil-soluble fluorescent dye (Nile Red) and a water-soluble fluorescent dye (sodium fluorescein) in the formulation, to an application area (6 cm2) of artificial leather (product name: Suprale, manufactured by Idemitsu Technofine Co., Ltd.) that has a wettability similar to that of skin. 2 ) and rubbed it in with a finger 10 times, then observed using the sectioning function of an all-in-one fluorescent microscope (product name: BZ-X700, Keyence Corporation) and evaluated based on the following evaluation criteria. A representative example is shown in Figure 2. (confirmation result) A: Oil-based and water-based components are mixed and attached to the surface of the artificial leather. B: Oil-based components are attached to the surface of the artificial leather, and water-based components are not attached to the artificial leather.

[0048] [Table 3]

[0049] As is clear from Table 3, when the component (D) was a water-swelling clay mineral, an oil dispersion composition with a particle size of 20 μm or more could be obtained at any blending amount (Examples 12 to 16). On the other hand, when the thickener of the water phase was not a water-swelling clay mineral, the oil phase and the water phase were separated in some thickeners (Comparative Examples 5 and 6), and the target oil dispersion composition could not be prepared. In addition, as a representative example of oil-water arrangement, the observation images of Example 1 and Comparative Example 7 are shown in FIG. 2. In Example 1, the oily component and the aqueous component were colocalized after application, and in Comparative Example 7, the layers were separated such that the oily component was on the artificial leather side and the aqueous component was on the air side. Therefore, although Example 1 had excellent moisturizing feeling because the penetration of water in the oil dispersion composition was not hindered by the oily component, Comparative Example 7 had insufficient moisturizing feeling because the penetration of the aqueous component was hindered by the oily component. Comparative Examples 8 and 9 also had the same oil-water arrangement as Comparative Example 7, so it is thought that the slippery blending was poor and sufficient moisturizing feeling could not be obtained. In other words, if component (D) is a water-swellable clay mineral (Examples 1, 12 to 16), it is possible to control the oil-water arrangement in which oily and aqueous components are mixed regardless of the type, but with thickeners other than water-swellable clay minerals, the oily components adhere to the skin surface, repelling the aqueous components and resulting in insufficient moisturizing effect.

[0050] [Table 4]

[0051] As is clear from Table 4, when component (A) was 0.1% by mass to 5% by mass (Examples 1, 17 to 22), an oil dispersion composition with an average particle size of 20 μm or more and excellent application uniformity, oil-water distribution, and moisturizing feeling could be obtained. However, when component (A) was not blended (Comparative Example 10), the oil phase aggregated and did not disperse, and when component (A) was 10% by mass (Comparative Example 11), the average particle size was less than 20 μm due to excessive dispersibility, and sufficient moisturizing feeling could not be obtained due to poor application uniformity. In addition, when the blending ratio of component (C) to component (B), (C) / (B), was 1 or more (Examples 20 to 22), there was a moderate oily film feeling as a residual feeling after application, and a high moisturizing feeling was obtained. However, when (C) / (B) was less than 1 (Example 23), although it was within the range in which the effects of the present invention could be obtained, the proportion of solid oil, which is component (B), was high, so the oily particles became hard, the uniformity of the applied surface decreased, and the moisturizing feeling tended to be slightly inferior. Furthermore, even if (C) / (B) was 1 or more, when (B)+(C) exceeded 50% by mass (Example 24), the blending amount of solid oil was high, although it was within the range in which the effects of the present invention could be obtained, so the moisturizing feeling tended to be slightly inferior due to the film feeling.

[0052] Formulation examples of the oil dispersion composition of the present invention are given below. The oil dispersion composition can be obtained by the preparation method of the oil dispersion composition described in the examples. All of them have large oil particles to prevent the occlusion property from decreasing due to penetration into the skin, and when applied to the skin, the oil can be applied without inhibiting the absorption of moisture, so that they have excellent moisture supply, and the oily components are evenly applied on the skin during the process of absorption of the composition into the skin, providing a high occlusion effect.

[0053] <Highly moisturizing emulsion> Display name Compounding amount (%) Liquid Isoparaffin 5.0 Squalane 2.0 Cetyl Tetraethylhexanoate 3.0 Dimethicone 3.0 Hydrogenated Lecithin 1.0 Beeswax 2.0 Vaseline 3.0 Purified water remainder 1,3-Butylene glycol 7.0 Glycerin 3.0 Silicate (Na / Mg) 1.5 pH adjuster (appropriate amount) Preservatives (appropriate amount) Total 100

[0054] <Highly moisturizing gel cream> Display name Compounding amount (%) Jojoba oil 10.0 Triethylhexanoin 5.0 Octyldodecyl myristate 5.0 Hydrogenated polyisobutene 3.0 Diphenylsiloxyphenyl Trimethicone 5.0 Purified water remainder BG 5.0 Glycerin 10.0 Diglycerin 3.0 Glycyrrhizic acid 2K 0.05 Fluorosilicate (Na / Mg) 3.0 Xanthan gum 0.2 Sodium hyaluronate 0.05 pH adjuster (appropriate amount) Preservatives (appropriate amount) Total 100

Claims

1. Component (A): 0.1% by mass to 5% by mass of phospholipid Component (B): solid oil and / or semi-solid oil Component (C): Liquid oil an oil phase consisting of solid oily particles comprising Component (D): Water-swellable clay mineral and an aqueous phase comprising The oil dispersion composition, wherein the average particle size of the oily particles is 20 μm or more and less than 300 μm.

2. The relationship between the amounts of component (B) and component (C) in the total amount of the oil dispersion composition is Formula 1: 50% by mass≧(B)+(C)≧0.5% by mass Formula 2: (C) / (B)≧1 The oil dispersion composition according to claim 1, characterized in that the above formulas 1 and 2 are satisfied.

3. A cosmetic comprising the oil dispersion composition according to claim 1 or 2.

4. Component (A): 0.1% by mass to 5% by mass of one or more types selected from phospholipids and surfactants having an HLB of 5.5 to 12 Component (B): solid oil and / or semi-solid oil Component (C): Liquid oil A step of heating and dissolving the oil phase containing the above component and then cooling it to a melting point or lower; Component (D): Water-swellable clay mineral A step of heating and dissolving the aqueous phase containing the oil phase and then cooling it to a melting point of the oil phase or lower; a step of stirring and mixing the oil phase and the water phase at a temperature equal to or lower than the slip melting point of the oil phase; A method for producing an oil dispersion composition.

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