Non-viscous Oil-in-Water Emulsion Cosmetic Composition Comprising Beta-Sitosterol

Abstract

The present invention relates to an oil-in-water type cosmetic composition containing beta-sitosterol, and can provide a cosmetic composition prepared with no viscosity by stabilizing the insoluble component beta-sitosterol through a combination of the oil-soluble solvent octyldodecanol and C12-15 benzoate.

Description

Technology Field

[0001] The present invention relates to a non-viscosity O / W emulsion cosmetic composition containing beta-sitosterol, and can provide a non-viscosity cosmetic composition in which beta-sitosterol, a poorly soluble component, is stabilized. Background Technology

[0003] Beta-sitosterol, a poorly soluble substance and a type of plant sterol, is attracting attention as an active ingredient in functional cosmetics due to its physiological activities, such as strengthening the skin barrier, anti-inflammatory effects, and antioxidant properties. However, because beta-sitosterol has low solubility not only in aqueous phases but also in general ester oils, silicone oils, and hydrocarbon oils, problems such as crystal precipitation, particle aggregation, and uneven application are prone to occur when formulated at substantial effective concentrations. In particular, in oil-in-water (O / W) cosmetic compositions where the aqueous phase is the continuous phase, the oil phase is limited to the dispersed phase; therefore, if beta-sitosterol is not sufficiently dissolved and contained in the oil phase, crystals may migrate to the surface or interface during storage or due to temperature changes, easily leading to physical instability such as a rough appearance, creaming, and viscosity changes. In low-viscosity lotion, essence, and mist-type O / W compositions, the amount of thickener used is limited, making it even more difficult to structurally suppress crystal precipitation and sedimentation caused by such poorly soluble active ingredients.

[0004] Conventionally, to incorporate poorly soluble ingredients such as beta-sitosterol into O / W cosmetic compositions, various methods have been attempted, including using high concentrations of water-soluble co-solvents such as ethanol and propylene glycol to increase solubility, designing high-viscosity cream formulations by incorporating large amounts of surfactants and thickeners, or using expensive special raw materials such as cyclodextrin-containing molecular inclusions and dispersed powders. However, the use of high concentrations of co-solvents raises concerns about skin irritation and dryness, and methods relying on high viscosity conflict with the trend of low-viscosity O / W formulations that demand a light feel, fresh spreadability, and rapid absorption. Furthermore, methods relying on special dispersion aids or molecular inclusions have limitations due to increased costs, reduced formulation freedom, and increased turbidity. Therefore, there is a demand for a technology that can stably incorporate poorly soluble active ingredients, such as beta-sitosterol, into low-viscosity O / W type cosmetic compositions, while suppressing crystal precipitation and sedimentation through an appropriate combination of oil-soluble solvents, and simultaneously ensuring long-term storage stability and excellent usability. Prior art literature

[0006] (Patent Document 0001) KR 10-2023-0021435 A The problem to be solved

[0007] One objective of the present invention is to provide a non-viscosity O / W emulsion cosmetic composition containing beta-sitosterol. means of solving the problem

[0009] One embodiment of the present invention is an oil-in-water type cosmetic composition comprising beta-sitosterol, octyldodecanol, and C12-15 benzoate.

[0010] In one specific example, the cosmetic composition may further include an emulsifier.

[0011] In another specific example, the emulsifier may be one or more of hydrogenated lecithin and sodium stearoyl glutamate.

[0012] In the embodiment according to any one of the preceding embodiments, the beta-sitosterol may be included in an amount of 0.001 to 5 weight% with respect to the total weight of the composition.

[0013] In the embodiment according to any one of the preceding embodiments, the octyldodecanol may be included in an amount of 5 to 13 weight% with respect to the total weight of the composition.

[0014] In the embodiment according to any one of the preceding embodiments, the C12-15 benzoate may be included in an amount of 1.5 to 7.5 weight% based on the total weight of the composition.

[0015] In the embodiment according to any one of the preceding embodiments, the hydrogenated lecithin may be included in an amount of 0.5 to 5 weight% based on the total weight of the composition.

[0016] In the embodiment according to any one of the preceding embodiments, the sodium stearoyl glutamate may be included in an amount of 0.1 to 1 weight% with respect to the total weight of the composition. Effects of the invention

[0018] The cosmetic composition according to the present invention combines octyldodecanol and C12-15 alkyl benzoate as an oil-soluble solvent in a specific ratio to dissolve and stabilize the poorly soluble active ingredient beta-sitosterol, thereby significantly improving the solubility of beta-sitosterol compared to when a single solvent is used, and provides excellent physical stability that substantially suppresses crystal precipitation, particle aggregation, sedimentation, phase separation, and viscosity fluctuations even under long-term storage and temperature changes in an oil-in-water type non-viscosity formulation. Brief explanation of the drawing

[0020] Figure 1 shows photographs of examples and comparative examples taken according to changes in the type of solvent. Figure 2 shows photographs of examples and comparative examples taken according to changes in octyldodecanol content. Figure 3 shows photographs of examples and comparative examples taken according to changes in C12-15 benzoate content. Figure 4 shows photographs of examples and comparative examples taken according to changes in beta-sitosterol content. Figure 5 shows photographs of examples and comparative examples taken according to changes in hydrogenated lecithin content. Figure 6 shows photographs of examples and comparative examples taken according to changes in sodium stearoyl glutamate content. Specific details for implementing the invention

[0021] This is explained in detail as follows. Meanwhile, each description and embodiment disclosed in the present invention may be applied to each other description and embodiment. That is, all combinations of the various elements disclosed in the present invention fall within the scope of the present invention. Furthermore, the scope of the present invention should not be considered limited by the specific descriptions provided below.

[0022] Furthermore, a person skilled in the art can recognize or identify a number of equivalents to the specific embodiments of the present invention described in this invention using only ordinary experiments. In addition, such equivalents are intended to be included in the present invention.

[0024] One embodiment of the present invention provides an oil-in-water type cosmetic composition comprising beta-sitosterol, octyldodecanol, and C12-15 benzoate.

[0026] In the present invention, the term “beta-sitosterol (β-sitosterol)” refers to a fat-soluble component derived primarily from vegetable oils, grains, nuts, legumes, etc., as a type of plant sterol (phytosterol). It refers to a raw material that can be used as a functional active ingredient in the field of cosmetics, exhibiting efficacy such as strengthening the skin barrier, soothing, anti-inflammatory, antioxidant, and moisturizing effects. Beta-sitosterol is a poorly soluble component that has extremely low solubility in water, as well as limited solubility in general ester oils, silicone oils, hydrocarbon oils, etc. When incorporated into a cosmetic composition in an effective amount, physical stability problems such as crystal precipitation, particle aggregation, sedimentation, and changes in appearance are likely to occur. In the present invention, beta-sitosterol is interpreted to include not only high-purity beta-sitosterol obtained by a conventional purification process, but also phytosterol mixtures containing beta-sitosterol as a main component, and their cosmetically acceptable formulation forms.

[0027] In one embodiment, the beta-sitosterol of the present invention may be included in an amount of 0.001 to 5 weight% based on the total weight of the composition, and specifically, may be included in an amount of 0.005 to 5 weight%, 0.01 to 5 weight%, 0.05 to 5 weight%, 0.1 to 5 weight%, 0.1 to 3 weight%, 0.2 to 3 weight%, 0.3 to 3 weight%, 0.5 to 3 weight%, 0.5 to 2.5 weight%, 0.8 to 2.5 weight%, 1.0 to 3.0 weight%, 1.0 to 2.5 weight%, 1.0 to 2.0 weight%, 1.5 to 2.5 weight%, 1.5 to 2.2 weight%, 1.8 to 2.2 weight%, and 2 to 3 weight% based on the total weight of the composition, but is not limited thereto.

[0029] In the present invention, "oil-soluble solvent" refers to an oil-phase solvent for cosmetic compositions that dissolves or uniformly disperses fat-soluble or poorly soluble active ingredients and stably incorporates them into the oil phase. Such oil-soluble solvents are not particularly limited as long as they are ingredients that do not substantially mix with water, have excellent compatibility with hydrocarbon oils, ester oils, silicone oils, etc., and exhibit solubility or solubility-assisting effects for poorly soluble sterols.

[0030] For example, the above-mentioned useful solvent may be one or more selected from the group consisting of (i) higher fatty alcohols, (ii) ester oils, (iii) hydrocarbon oils, (iv) silicone oils, and (v) other synthetic or naturally derived oily components used as oil phase solvents in the conventional cosmetic field. Specifically, it may be octyldodecanol, isostearyl alcohol, C12-15 alkyl benzoate, isopropyl myristate, diisostearyl maleate, triglycerides, isohexadecane, hydrogenated polydecene, mineral oil, dimethicone, cyclomethicone, and phenyltrimethicone. More specifically, it may be octyldodecanol and C12-15 benzoate, but is not limited thereto.

[0031] The cosmetic composition of the present invention may not include squalane or caprylic / capric triglyceride as an oil-soluble solvent.

[0033] In the present invention, "octyldodecanol" refers to a branched higher fatty alcohol having 20 carbon atoms, which is mainly produced by hydrogenation or fractional purification of fatty acids or fatty alcohols, and is an oil phase component for cosmetics that exhibits a transparent oil phase liquid form at room temperature. Octyldodecanol is a low-polarity fat-soluble alcohol that has excellent compatibility with various ester oils, hydrocarbon oils, and silicone oils, and exhibits a soft feel, a suitable viscosity-improving effect, and excellent spreadability; therefore, it can be widely used as an emollient, viscosity modifier, solvent, and oil phase base in cosmetic compositions. In particular, in the present invention, octyldodecanol functions as one of the "oil-soluble solvents" that provide solubility and solubility-assisting effects for poorly soluble fat-soluble active ingredients such as beta-sitosterol, and can be used alone or in combination with other oil phase components (e.g., C12-15 benzoate, etc.).

[0034] In one specific example, the octyldodecanol of the present invention may be included in an amount of 5 to 13 weight% based on the total weight of the composition, and specifically, may be included in an amount of 5 to 12 weight%, 5 to 11 weight%, 5 to 10 weight%, 6 to 13 weight%, 6 to 12 weight%, 6 to 11 weight%, 6 to 10 weight%, 7 to 13 weight%, 7 to 12 weight%, 7 to 11 weight%, 7 to 10 weight%, 7 to 9 weight%, and 7 to 8 weight% based on the total weight of the composition, but is not limited thereto. If octyldodecanol is included in a small amount or an excess amount compared to the above content, emulsion separation may occur, and if it is not included, the dissolution of the insoluble component itself becomes difficult, and precipitation may occur.

[0036] In the present invention, "C12-15 benzoate" refers to a mixture of monoesters obtained from benzoic acid and a monovalent alkyl alcohol having 12 to 15 carbon atoms, and refers to an ester oil for cosmetics that exhibits a transparent oil phase liquid form with low viscosity at room temperature. C12-15 benzoate has characteristics that impart relatively low viscosity, excellent spreadability, and a fresh feel, and has excellent compatibility with various silicone oils, ester oils, sunscreens, and oil-soluble active ingredients, so it is an ingredient that can be widely used as an emollient, texture improver, solvent, and oil phase base in cosmetic compositions. In particular, in the present invention, C12-15 benzoate functions as one of the "oil-soluble solvents" that provide solubility and solubility-assisting effects for poorly soluble and fat-soluble active ingredients, and plays a role in simultaneously providing excellent solubility stability and a light feel in non-viscosity O / W type cosmetic compositions through combination with other oil phase components such as octyldodecanol.

[0037] In one specific example, the C12-15 benzoate of the present invention may be included in an amount of 1.5 to 7.5 weight% based on the total weight of the composition, and specifically, may be included in an amount of 1.5 to 5 weight%, 2 to 5 weight%, 2 to 4 weight%, 2 to 3.5 weight%, 2 to 3 weight%, 1.5 to 2.5 weight%, or 2 to 2.5 weight% based on the total weight of the composition, but is not limited thereto. If the C12-15 benzoate is included in a small amount less than the above content, the insoluble component may precipitate as granulation, if it is included in an excessive amount, emulsion separation may occur, and if it is not included, the dissolution of the insoluble component itself becomes difficult and precipitation may occur.

[0039] In one embodiment, the cosmetic composition of the present invention may further include an emulsifier.

[0041] In this specification, the term "emulsifier" refers to a substance added to increase the stability of an emulsion, and may mean a substance added to help emulsify two or more immiscible liquids by vigorously stirring them to become one liquid.

[0042] For example, the emulsifier may be one or more selected from the group consisting of ester or ether-type surfactants of higher fatty acids, glyceryl fatty acid esters, sorbitan-based and polyoxyethylene sorbitan-based surfactants, fatty alcohol ethoxylates, polyglyceryl-based surfactants, amino acid-derived surfactants, and polymer emulsifiers, and specifically may be hydrogenated lecithin and sodium stearoyl glutamate, but is not limited thereto.

[0043] In one specific example, the hydrogenated lecithin of the present invention may be included in an amount of 0.5 to 5 weight% based on the total weight of the composition, and specifically, may be included in an amount of 0.5 to 4 weight%, 0.5 to 3 weight%, 1 to 5 weight%, 2 to 4 weight%, 2 to 3 weight%, or 2.5 to 3.5 weight% based on the total weight of the composition, but is not limited thereto. If the hydrogenated lecithin is included in a small amount less than the above content or is not included, separation of the emulsion layer may occur, and precipitation may occur because the dissolution of the insoluble component itself is difficult.

[0044] In one specific example, the sodium stearoyl glutamate of the present invention may be included in an amount of 0.1 to 1 weight% based on the total weight of the composition, and specifically, may be included in an amount of 0.1 to 0.9 weight%, 0.1 to 0.8 weight%, 0.1 to 0.7 weight%, 0.1 to 0.6 weight%, 0.1 to 0.5 weight%, 0.1 to 0.4 weight%, 0.1 to 0.3 weight%, 0.2 to 0.3 weight%, or 0.15 to 0.25 weight% based on the total weight of the composition, but is not limited thereto. If sodium stearoyl glutamate is included in a small amount less than the above content, fine layer separation may occur, and if it is not included, emulsion layer separation may occur, and precipitation may occur because the dissolution of the insoluble component itself is difficult.

[0046] The cosmetic composition of the present invention may additionally include ingredients included in general cosmetic compositions as needed.

[0047] For example, the ingredients included in a general cosmetic composition as needed may be one or more selected from the group consisting of oil ingredients, emulsifying aids, moisturizers, emollients, surfactants, organic and inorganic pigments, organic powders, UV absorbers, preservatives, disinfectants, antioxidants, plant extracts, pH adjusters, alcohols, colorants, fragrances, blood circulation promoters, cooling agents, antiperspirants, and purified water, and specifically may be emulsifying aids, but are not limited thereto.

[0048] In one specific example, the emulsifying agent may be polyglyceryl-3 methylglucose distearate, but is not limited thereto.

[0049] In another specific example, the emulsifying agent of the present invention may be included in an amount of 0.1 to 2 weight% with respect to the total weight of the composition, and specifically, may be included in an amount of 1 to 1.5 weight% with respect to the total weight of the composition, but is not limited thereto.

[0051] The cosmetic composition formulation of the present invention may be a non-viscous formulation.

[0053] In the present invention, "no viscosity" refers to a low-viscosity cosmetic composition having very high fluidity and water-like flowability to the extent that viscosity is barely felt in terms of usability. More specifically, it can be understood as a concept that falls within a range where viscosity measurement is very difficult or impossible under specific spindle and rotation speed (e.g., 12 rpm) conditions using a rotational viscometer (e.g., Brookfield DV2T) at 25°C, but is not limited thereto.

[0055] The cosmetic composition of the present invention may be prepared in a formulation selected from the group consisting of a solution, an external ointment, a cream, a foam, a nourishing lotion, a softening lotion, a pack, a softening water, a lotion, a makeup base, an essence, a soap, a liquid cleanser, a bath additive, a sunscreen cream, a sun stick, a sun balm, a sun oil, a suspension, an emulsion, a paste, a gel, a lotion, a powder, a soap, a surfactant-containing cleansing oil, a powder foundation, an emulsion foundation, a wax foundation, a patch, and a spray, but is not limited thereto.

[0056] More specifically, the cosmetic composition of the present invention may be prepared as a water-in-oil type formulation (water-in-oil type, oil-in-water type, or water-in-silicone type, etc.) comprising water as the main continuous phase or dispersed phase, and may be implemented, for example, in the form of an emulsified cream, an emulsified lotion, an emulsified essence, an emulsified sun cream, a water-based gel, an emulsified cleansing foam, a water-based cleansing oil, a water-based mist, a water-based serum, a water-based spray, or a combination thereof.

[0058] The present invention will be described in more detail below through examples. These examples are merely illustrative of the present invention and should not be interpreted as limiting the scope of the present invention.

[0061] (1) Experimental Example 1: Comparison of effects according to solvent type

[0063] Cosmetic compositions of Examples 1 to 2 and Comparative Examples 1 to 2 were prepared according to the content listed in Table 1.

[0065] Comparative Examples 1 to 2 are comparative examples containing squalane and caprylic / capric triglyceride in the solvent, respectively.

[0067] The method for preparing a cosmetic composition is as follows. First, the aqueous and oil phase components constituting the composition are each heated to 80°C. Next, the heated aqueous and oil phases are mixed, and then a water-in-oil type emulsion is formed by high-speed stirring using a homogenizer at a speed of approximately 3,000 rpm for 5 minutes while the mixture is heated. The composition obtained in this way is then treated twice using a microfluidizer to prepare the cosmetic composition.

[0069] ingredient Example 1 Example 2 Comparative Example 1 Comparative Example 2 beta-sitosterol 2 2 2 2 Octyldodecanol 7 7 0 0 C12-15 benzoate 2 3 2 2 Squalan 0 0 7 0 Caprylic / Capric Triglyceride 0 0 0 7 Hydrogenated lecithin 2.5 2.5 2.5 2.5 Sodium stearoyl glutamate 0.2 0.2 0.2 0.2 purified water To 100 To 100 To 100 To 100

[0071] For cosmetic compositions according to Examples 1 and 2 and Comparative Examples 1 and 2, stability according to the type of solvent was confirmed, and the results are shown in FIG. 1 and Table 2.

[0073] The cosmetic compositions according to Examples 1 and 2 and Comparative Examples 1 and 2 were checked at room temperature for 2 weeks after preparation to observe whether solidification, layer separation, and precipitation occurred.

[0075] Example 1 Example 2 Comparative Example 1 Comparative Example 2 Stability stability stability Coagulation (creaming) Coagulation (creaming)

[0077] As a result, as can be seen in Figure 1 and Table 2 above, it was confirmed that the cosmetic composition was stable without coagulation when only octyldodecanol and C12-15 benzoate were used as solvents, but it was confirmed that the cosmetic composition exhibited a coagulation (creaming) phenomenon when squalane or caprylic / capric triglyceride was included as a solvent in addition to the two types mentioned above.

[0079] (2) Experimental Example 2: Comparison of effects according to octyldodecanol content

[0081] Cosmetic compositions of Examples 3 to 4 and Comparative Examples 3 to 5 were prepared according to the content listed in Table 3.

[0083] Comparative Examples 3 to 5 are comparative examples in which the octyldodecanol content was changed to a small amount, an excess amount, or not included.

[0085] The method of preparing the cosmetic composition is the same as in Experimental Example 1.

[0087] ingredient Example 3 Example 4 Comparative Example 3 Comparative Example 4 Comparative Example 5 beta-sitosterol 2 2 2 2 2 Octyldodecanol 7 10 3 15 0 C12-15 benzoate 2 2 2 2 2 Hydrogenated lecithin 3 3 3 3 3 Sodium stearoyl glutamate 0.2 0.2 0.2 0.2 0.2 purified water To 100 To 100 To 100 To 100 To 100

[0089] For cosmetic compositions according to Examples 3 to 4 and Comparative Examples 3 to 5, stability was confirmed according to changes in octyldodecanol content, and the results are shown in FIG. 2 and Table 4.

[0091] The method for verifying stability is the same as in Experimental Example 1.

[0093] Example 3 Example 4 Comparative Example 3 Comparative Example 4 Comparative Example 5 Stability stability stability Emulsion layer separation Emulsion layer separation precipitation

[0095] As a result, as can be seen in FIG. 2 and Table 4 above, it was confirmed that the example containing 7 to 10 weight% of octyldodecanol was stable. In the case of Comparative Examples 3 and 4 containing trace or excess octyldodecanol, it was confirmed that emulsion separation occurred because the dissolution of beta-sitosterol itself was difficult during the experiment. In addition, in the case of Comparative Example 5 not containing octyldodecanol, it was confirmed that precipitation occurred because the dissolution of beta-sitosterol itself was difficult during the experiment.

[0097] (3) Experimental Example 3: Comparison of effects according to C12-15 benzoate content

[0099] Cosmetic compositions of Examples 5 to 6 and Comparative Examples 6 to 8 were prepared according to the content listed in Table 5.

[0101] Comparative Examples 6 to 8 are comparative examples in which the C12-15 benzoate content was changed to a small amount, an excess amount, or not included.

[0103] The method of preparing the cosmetic composition is the same as in Preparation Example 1.

[0105] ingredient Example 5 Example 6 Comparative Example 6 Comparative Example 7 Comparative Example 8 beta-sitosterol 2 2 2 2 2 Octyldodecanol 7 7 7 7 7 C12-15 benzoate 2 5 1 10 0 Hydrogenated lecithin 3 3 3 3 3 Sodium stearoyl glutamate 0.2 0.2 0.2 0.2 0.2 purified water To 100 To 100 To 100 To 100 To 100

[0107] For cosmetic compositions according to Examples 5 to 6 and Comparative Examples 6 to 8, stability was confirmed according to changes in C12-15 benzoate content, and the results are shown in FIG. 3 and Table 6.

[0109] The method for verifying stability is the same as in Experimental Example 1.

[0111] Example 5 Example 6 Comparative Example 6 Comparative Example 7 Comparative Example 8 Stability stability stability precipitation Emulsion layer separation precipitation

[0113] As a result, as can be seen in FIG. 3 and Table 6 above, it was confirmed that the example containing 2 to 5 weight% of C12-15 benzoate was stable. In the case of Comparative Example 6, which contained a trace amount of C12-15 benzoate, it was confirmed that beta-sitosterol precipitated while granulating, and in the case of Comparative Example 7, which contained an excess amount of C12-15 benzoate, it was confirmed that emulsion separation occurred. In addition, in the case of Comparative Example 8, which did not contain C12-15 benzoate, it was confirmed that beta-sitosterol precipitated because dissolving itself was difficult during the experiment.

[0115] (4) Experimental Example 4: Comparison of effects according to beta-sitosterol content

[0117] Cosmetic compositions of Examples 7 to 8 and Comparative Example 9 were prepared according to the content listed in Table 7.

[0119] Examples 7 and 8 are cosmetic compositions prepared with beta-sitosterol content of 2% and 3% by weight, respectively, and Comparative Example 9 is a comparative example in which the beta-sitosterol content was changed to an excess amount.

[0121] The method of preparing the cosmetic composition is the same as in Preparation Example 1.

[0123] ingredient Example 7 Example 8 Comparative Example 9 beta-sitosterol 2 3 7 Octyldodecanol 7 7 7 C12-15 benzoate 2 2 2 Hydrogenated lecithin 3 3 3 Sodium stearoyl glutamate 0.2 0.2 0.2 purified water To 100 To 100 To 100

[0125] For the cosmetic compositions according to Examples 7 to 8 and Comparative Example 9, stability was confirmed according to changes in beta-sitosterol content, and the results are shown in FIG. 4.

[0127] The evaluation method is the same as in Experimental Example 1.

[0129] As a result, as can be seen in Figure 4, it was confirmed that all examples containing 2 to 3 weight percent of beta-sitosterol were stable, and in the case of Comparative Example 9 containing an excess amount of beta-sitosterol, it was confirmed that the dissolution of beta-sitosterol itself was difficult during the experiment and precipitation occurred.

[0131] (5) Experimental Example 5: Comparison of effects according to hydrogenated lecithin content

[0133] Cosmetic compositions of Examples 9 to 10 and Comparative Examples 10 to 11 were prepared according to the content listed in Table 8.

[0135] Comparative Examples 10 to 11 are comparative examples in which the hydrogenated lecithin content was changed to a small amount or not included.

[0137] The method of preparing the cosmetic composition is the same as in Preparation Example 1.

[0139] ingredient Example 9 Example 10 Comparative Example 10 Comparative Example 11 beta-sitosterol 2 2 2 2 Octyldodecanol 7 7 7 7 C12-15 benzoate 2 2 2 2 Hydrogenated lecithin 1 3 0.5 0 Sodium stearoyl glutamate 0.2 0.2 0.2 0.2 purified water To 100 To 100 To 100 To 100

[0141] For cosmetic compositions according to Examples 9 to 10 and Comparative Examples 10 to 11, stability was confirmed according to changes in hydrogenated lecithin content, and the results are shown in FIG. 5 and Table 9.

[0143] The method for verifying stability is the same as in Experimental Example 1.

[0145] Example 9 Example 10 Comparative Example 10 Comparative Example 11 Stability stability stability Emulsion layer separation + precipitation Emulsion layer separation + precipitation

[0147] As a result, as can be seen in FIG. 5 and Table 9 above, it was confirmed that the example containing 1 to 3 weight% of hydrogenated lecithin is stable. In the case of Comparative Example 10 containing a small amount of hydrogenated lecithin and Comparative Example 11 not containing it, it was confirmed that beta-sitosterol precipitated at the same time as the emulsion layer separation occurred.

[0149] (6) Experimental Example 6: Comparison of effects according to sodium stearoyl glutamate content

[0151] Cosmetic compositions of Examples 11 to 12 and Comparative Examples 12 to 13 were prepared according to the content listed in Table 10.

[0153] Comparative Examples 12 to 13 are comparative examples in which the sodium stearoglutamate content was changed to a small amount or not included.

[0155] The method of preparing the cosmetic composition is the same as in Preparation Example 1.

[0157] ingredient Example 11 Example 12 Comparative Example 12 Comparative Example 13 beta-sitosterol 2 2 2 2 Octyldodecanol 7 7 7 7 C12-15 benzoate 2 2 2 2 Hydrogenated lecithin 3 3 3 3 Sodium stearoyl glutamate 0.1 0.4 0.05 0 purified water To 100 To 100 To 100 To 100

[0159] For cosmetic compositions according to Examples 11 to 12 and Comparative Examples 12 to 13, stability was confirmed according to changes in sodium stearoglutamate content, and the results are shown in FIG. 6 and Table 11.

[0161] The method for verifying stability is the same as in Experimental Example 1.

[0163] Example 11 Example 12 Comparative Example 12 Comparative Example 13 Stability stability stability Emulsion layer separation + precipitation Emulsion layer separation + precipitation

[0165] As a result, as can be seen in FIG. 6 and Table 11 above, it was confirmed that the example containing 0.1 to 0.4 weight% of sodium stearoglutamate is stable. In the case of Comparative Example 12 containing a small amount of sodium stearoglutamate and Comparative Example 13 not containing it, it was confirmed that beta-sitosterol precipitated at the same time as the emulsion layer separation occurred.

[0167] Foregoing, specific parts of the content of the present invention have been described in detail. It will be apparent to those skilled in the art that such specific descriptions are merely preferred embodiments and do not limit the scope of the present invention. Accordingly, the actual scope of the present invention is defined by the appended claims and their equivalents.

Claims

Claim 1 An oil-in-water type cosmetic composition comprising beta-sitosterol, octyldodecanol, and C12-15 benzoate, wherein the beta-sitosterol is included in an amount of 0.001 to 5 weight% based on the total weight of the composition, the octyldodecanol is included in an amount of 5 to 13 weight% based on the total weight of the composition, and the C12-15 benzoate is included in an amount of 1.5 to 7.5 weight% based on the total weight of the composition. Claim 2 In claim 1, the cosmetic composition further comprises an emulsifier, an oil-in-water type cosmetic composition. Claim 3 A water-in-oil type cosmetic composition, wherein the emulsifier is one or more of hydrogenated lecithin and sodium stearoyl glutamate. Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 In paragraph 3, the above-mentioned hydrogenated lecithin is included in an amount of 0.5 to 5 weight% based on the total weight of the composition, in an oil-in-water type cosmetic composition. Claim 8 A water-in-oil type cosmetic composition according to claim 3, wherein the sodium stearoyl glutamate is included in an amount of 0.1 to 1 weight% based on the total weight of the composition.

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