Oil-in-water cosmetic composition having no whitening phenomenon

Abstract

An oil-in-water cosmetic composition having no clouding phenomenon. The oil-in-water cosmetic composition according to the present application, as an organic / natural cosmetic composition not containing a polyethylene glycol-based surfactant, a silicone oil, and / or a synthetic polymer, can provide a cosmetic composition having no clouding phenomenon and excellent formulation stability by simultaneously containing a fatty alcohol and a lecithin-based surfactant.

Description

Technical Field

[0001] This invention relates to an oil-in-water cosmetic composition that does not exhibit cloudiness, and more specifically, to an oil-in-water cosmetic composition that does not contain polyethylene glycol surfactants, synthetic polymers, or silicone oil, while exhibiting excellent skin absorption and no cloudiness. Background Technology

[0002] Polyethylene glycol (PEG) surfactants and synthetic polymers have long been widely used in common oil-in-water emulsions as raw materials that contribute to formulation stability and viscosity formation. However, ethylene oxide and 1,4-dioxane, which can be generated as byproducts in the synthesis of PEG surfactants, are regulated as carcinogens. Furthermore, due to concerns about residual byproducts in the raw materials, negative consumer perceptions of PEG surfactants are increasing.

[0003] Silicone oils (such as cyclomethicone and dimethicone) have long been widely used in cosmetics to improve the cloudiness that occurs when applied to the skin in ordinary oil-in-water emulsions, achieving a light and silky feel. Dimethicone, with its high molecular weight, provides high defoaming ability even in small amounts, and is therefore widely used as an antifoaming agent in emulsion products. However, with increasing awareness of water pollution problems and skin hazards associated with silicone oils, negative consumer perceptions of their use are also rising.

[0004] Furthermore, consumers are paying increasing attention to the ingredients used in cosmetics. Therefore, they prefer products made with natural or organic ingredients over those using synthetic ones. They hold negative views not only of products containing ingredients known to be harmful to human health (e.g., polyethylene glycol surfactants, silicone oils, paraben preservatives), but also of products containing synthetic polymers themselves. Consequently, there is a growing demand for developing natural or organic cosmetics that do not use polyethylene glycol surfactants, silicone oils, and synthetic polymers.

[0005] Synthetic polymers, even in small amounts, contribute to formulation stability and viscosity formation. Similarly, polyethylene glycol surfactants, even in small amounts, can improve formulation stability. Silicone oils can prevent the whitening of cosmetics and provide a silky and soft feel. However, these components are not included in natural / organic emulsion formulations, which significantly reduces the stability and quality of the emulsion.

[0006] Furthermore, emulsions made with natural / organic materials have the following problems: they feel very dry when applied to the skin, absorb slowly, and leave a whitish, cloudy residue. Also, when using natural polymers instead of synthetic polymers, a composition with the desired viscosity level is achieved by using larger amounts of natural polymers such as fatty alcohols and natural waxes compared to synthetic polymers. However, in this case, the large amount of natural polymers makes the emulsion feel even drier, and it produces bubbles when applied to and rubbed into the skin. These bubbles do not deflate, thus further exacerbating the white, cloudy residue left on the skin.

[0007] Therefore, there is a need to develop a formulation that can improve quality-related issues such as cloudiness, dryness, and slow and low absorption, even in cosmetic compositions containing natural / organic materials that do not contain polyethylene glycol surfactants, silicone oils, and synthetic polymers. Summary of the Invention

[0008] The problem to be solved by the present invention

[0009] The inventors conducted research to improve stability and usability and solve the problem of cloudiness in cosmetic compositions that do not contain polyethylene glycol surfactants, silicone oils and minimize the use of synthetic polymers. As a result, they confirmed that if octyl dodecanol and lecithin surfactants are included, a composition can be provided that maintains stability without the problem of cloudiness, thus completing the present invention.

[0010] Therefore, the object of the present invention is to provide a water-in-oil cosmetic composition that, without containing polyethylene glycol surfactants and silicone oil, contains octyl dodecanol or two or more fatty alcohols selected from the group consisting of octyl dodecanol, cetearyl alcohol and behenol, as well as lecithin surfactants, which has excellent stability of emulsified particles, as well as excellent skin absorption and adhesion, and thus does not produce a white cloud phenomenon.

[0011] Methods for solving problems

[0012] As a means to solve the above-mentioned problems, the present invention provides an oil-in-water cosmetic composition comprising octyl dodecanol or two or more fatty alcohols selected from the group consisting of octyl dodecanol, cetearyl alcohol and behenol, and lecithin surfactants.

[0013] Furthermore, the present invention provides the use of cosmetic compositions for preparing cosmetics, and the cosmetic composition may be an oil-in-water cosmetic composition comprising octyl dodecanol or two or more fatty alcohols selected from the group consisting of octyl dodecanol, cetearyl alcohol and behenol, and lecithin surfactants.

[0014] Relative to 100 parts by weight of the total cosmetic composition, the cosmetic composition of the present invention may contain less than 0.1 parts by weight or less than 0.01 parts by weight of polyethylene glycol surfactant and / or silicone oil. Preferably, the cosmetic composition may not contain polyethylene glycol surfactant and / or silicone oil.

[0015] Relative to 100 parts by weight of the total composition, the above-mentioned water-in-oil cosmetic composition may contain 0.1 to 10 parts by weight of lecithin surfactant and 0.5 to 12 parts by weight of fatty alcohol.

[0016] Relative to 100 parts by weight of the total composition, the above-mentioned water-in-oil cosmetic composition may contain 0.1 to 5 parts by weight of lecithin surfactant and 1 to 12 parts by weight of fatty alcohol.

[0017] The aforementioned fatty alcohols may include octyldodecyl alcohol, cetearyl alcohol, and behenol.

[0018] Relative to 100 parts by weight of the total composition, the above-mentioned oil-in-water cosmetic composition may contain 1 to 7 parts by weight of octyldodecyl alcohol, 0.5 to 3 parts by weight of cetearyl alcohol and 0.5 to 1.5 parts by weight of behenol.

[0019] The above-mentioned water-in-oil cosmetic composition may also contain plant oils.

[0020] The content of the above-mentioned plant oil can be 1 to 30 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

[0021] The above-mentioned water-in-oil cosmetic composition may also contain one or more of the group consisting of natural emulsifiers and natural emulsifying aids.

[0022] The content of the above-mentioned natural emulsifying agent may be 1 to 9 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

[0023] The lightness value of the skin measured by a colorimeter and then calculated according to the following general formula 1 can be less than 1.5.

[0024] [General Formula 1]

[0025]

[0026] The above-mentioned cosmetic composition may be in the form of lotion, cleanser, oil, lotion, cream, stick, serum, cosmetic ointment, balm, spray, gel, mask or powder.

[0027] The above-mentioned water-in-oil cosmetic composition may further include one or more of the following groups: solvent, fragrance, thickener, moisturizer and preservative.

[0028] Furthermore, this invention provides a method for preparing an oil-in-water cosmetic composition. The cosmetic composition prepared by the method of this invention has the following advantages: excellent stability over time, thereby improving preparation efficiency and product storage efficiency. Moreover, it has the advantage of not exhibiting cloudiness, thus satisfying consumer preferences when preparing cosmetics.

[0029] The method for preparing the water-in-oil cosmetic composition of the present invention includes:

[0030] Add the thickener to the solvent and disperse for 10 to 50 minutes;

[0031] A water-soluble raw material is added to the above dispersion and heated to 50°C to 100°C to prepare an aqueous mixture;

[0032] An oil phase mixture is prepared by mixing octyldodecyl alcohol or two or more fatty alcohols selected from the group consisting of octyldodecyl alcohol, cetearyl alcohol and behenyl alcohol, and lecithin surfactants and heating to 50°C to 100°C.

[0033] At 50°C to 100°C, the oil phase mixture is added to the above aqueous phase mixture, and emulsified using a homogenizer at 2000 to 4000 rpm for 5 to 30 minutes; and

[0034] The emulsified oil-water mixture was cooled to 20 to 30°C and defoamed.

[0035] The above preparation method may further include: adding one or more of the group selected from the group consisting of ultraviolet blocking agents, neutralizing agents, thickeners, fragrances, antioxidants, pigments, solvents, humectants and preservatives to the oil-water phase mixture, and emulsifying it at 2000 to 4000 rpm for 5 to 30 minutes using a homogenizer.

[0036] The solvents mentioned above include, but are not limited to, those commonly used in the technical field of this invention. For example, it could be pure water, but it is not limited thereto.

[0037] The aforementioned water-soluble raw materials may include solvents and / or humectants. These solvents and humectants may include, but are not limited to, those commonly used in the technical field of this invention.

[0038] The above-mentioned oil phase mixture can be prepared by further comprising one or more of the group consisting of emulsifying agents, preservatives and vegetable oils.

[0039] In the preparation steps of the above-mentioned oil phase mixture, the fatty alcohol and lecithin surfactant may comprise 0.1 to 10 parts by weight of lecithin surfactant and 0.5 to 12 parts by weight of fatty alcohol relative to 100 parts by weight of the total oil-in-water cosmetic composition.

[0040] The aforementioned fatty alcohols may include octyldodecanol, cetearyl alcohol, and behenol. Regarding the aforementioned octyldodecanol, cetearyl alcohol, and behenol, relative to 100 parts by weight of the total oil-in-water cosmetic composition, it may contain 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol, and 0.5 to 1.5 parts by weight of behenol.

[0041] The above-mentioned oil phase mixture can be prepared by further including vegetable oil, and the above-mentioned vegetable oil can be included in an amount of 1 to 30 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

[0042] The above-mentioned oil phase mixture can be prepared by further including a natural emulsifying agent, and the above-mentioned natural emulsifying agent can be included in an amount of 1 to 9 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

[0043] The structure of the present invention will now be described in detail.

[0044] The water-in-oil cosmetic composition of the present invention comprises octyl dodecanol or two or more fatty alcohols selected from the group consisting of octyl dodecanol, cetearyl alcohol and behenol, as well as lecithin surfactants.

[0045] The cosmetic composition of the present invention contains lecithin surfactant and fatty alcohol to solve the problem of white residue on the skin caused by the inability to remove bubbles generated during the application of cosmetics without the use of conventional PEG surfactants, synthetic polymers or silicone oils.

[0046] In this invention, lecithin surfactants, as natural surfactants, mean that all lecithin or surface-active ingredients derived therefrom are included. The aforementioned lecithin surfactants may be included to increase the initial viscosity of the composition and stabilize the dosage form. In particular, naturally derived lecithin surfactants have attracted considerable attention as an alternative to PEG-based surfactants, but they suffer from the following problem: using lecithin surfactants alone in oil-in-water cosmetic compositions fails to maintain the desired cosmetic properties.

[0047] In this invention, the lecithin surfactant can be selected from the group consisting of lecithin, hydrogenated lecithin, soybean lecithin, hydrogenated lecithin / C12-16 alcohol / palmitic acid, lysophosphatidylcholine (hydrogenated), and hydrogenated phospholipids, but is not limited thereto.

[0048] Relative to 100 parts by weight of all water-in-oil cosmetic compositions, the present invention may contain 0.1 to 5 parts by weight, 0.1 to 4 parts by weight, 0.1 to 3 parts by weight, 1 to 5 parts by weight, 1 to 4 parts by weight, or 1 to 3 parts by weight of the above-mentioned lecithin surfactant.

[0049] The aforementioned fatty alcohol refers to higher alcohols with 6 or more carbon atoms. In this invention, the technical feature is that it contains two or more of the following: octyldodecyl alcohol, or selected from the group consisting of octyldodecyl alcohol, cetearyl alcohol, and behenyl alcohol, to suppress the turbidity phenomenon in water-in-oil cosmetics and improve the stability and absorption of the cosmetics.

[0050] Specifically, the aforementioned fatty alcohols can be octyldodecyl alcohol; cetearyl alcohol and behenol; octyldodecyl alcohol and cetearyl alcohol; octyldodecyl alcohol and behenol; or octyldodecyl alcohol, cetearyl alcohol and behenol.

[0051] In particular, for the present invention, it is preferable to include octyldodecyl alcohol, and when octyldodecyl alcohol (which is a branched fatty alcohol) is included, it is used as an antifoaming agent in cosmetic compositions containing lecithin surfactants, and has excellent defoaming effect in removing bubbles that occur during friction.

[0052] Moreover, the water-in-oil cosmetic composition containing cetearyl alcohol, behenyl alcohol, and octyldodecyl alcohol has the following characteristics: the visual stability of the cosmetic composition is significantly improved, and the skin adhesion of the composition is excellent.

[0053] The present invention may contain 0.5 to 12 parts by weight, 1 to 12 parts by weight, or 2 to 12 parts by weight of fatty alcohol, relative to 100 parts by weight of the total water-in-oil cosmetic composition. When the content of fatty alcohol in the cosmetic composition of the present invention exceeds 12 parts by weight, the stability of the water-in-oil cosmetic composition may actually deteriorate.

[0054] The aforementioned fatty alcohols may include octyldodecyl alcohol, cetearyl alcohol, and / or behenol.

[0055] Octyldodecyl alcohol can be included in cosmetic compositions as a fragrance or skin emollient, and is known to help protect the skin and impart conditioning effects. Octyldodecyl alcohol can be C7 to C50, preferably C7 to C30. When the number of carbon atoms in octyldodecyl alcohol increases, it exhibits solid properties at room temperature, and the diffusion rate decreases with increasing molecular weight, leading to problems such as reduced whitening of the dosage form and decreased efficacy.

[0056] The content of octyldodecanol relative to 100 parts by weight of the total oil-in-water cosmetic composition can be 0.5 to 12 parts by weight, 0.5 to 11 parts by weight, 0.5 to 10 parts by weight, 0.5 to 9 parts by weight, 0.5 to 8 parts by weight, 0.5 to 7 parts by weight, 1 to 12 parts by weight, 1 to 11 parts by weight, 1 to 10 parts by weight, 1 to 9 parts by weight, 1 to 8 parts by weight, 1 to 7 parts by weight, 2 to 12 parts by weight, 2 to 11 parts by weight, 2 to 10 parts by weight, 2 to 9 parts by weight, 2 to 8 parts by weight, or 2 to 7 parts by weight. When the content of octyldodecanol is less than 0.5 parts by weight, the turbidity of the emulsion may be aggravated, and the stability and absorbability may decrease. Moreover, when the content of octyldodecanol exceeds 12 parts by weight, there is a problem of decreased stability of the oil-in-water composition.

[0057] The content of the aforementioned cetearyl alcohol can be 0.5 to 3 parts by weight, 0.8 to 3 parts by weight, 1 to 3 parts by weight, 0.5 to 2.5 parts by weight, or 0.5 to 2 parts by weight. In the cosmetic composition of the present invention, the aforementioned cetearyl alcohol is included together with lecithin-based surfactants, thereby inhibiting turbidity and improving the stability of the emulsion in the oil-in-water emulsion composition. When the content of the aforementioned cetearyl alcohol is less than 0.5 parts by weight, the stability of the dosage form may be unstable, and when the content exceeds 3 parts by weight, excessive initial bubbles may be generated and turbidity may be exacerbated when rubbed onto the skin.

[0058] The content of behenol can be 0.5 to 2 parts by weight, 0.5 to 1.5 parts by weight, or 0.5 to 1 part by weight. In the cosmetic composition of the present invention, behenol is included together with lecithin-based surfactants, thereby inhibiting turbidity and improving the stability of the emulsion in the oil-in-water emulsion composition. When the content of behenol is less than 0.5 parts by weight, the stability of the dosage form may be unstable, and when the content exceeds 3 parts by weight, excessive initial bubbles are generated when rubbed onto the skin, thus potentially exacerbating turbidity.

[0059] In particular, when the fatty alcohol of the present invention simultaneously comprises octyldodecanol, cetearyl alcohol, and behenol, the total content of the above three components shall not exceed 12 parts by weight relative to 100 parts by weight of the entire oil-in-water cosmetic composition. Specifically, relative to 100 parts by weight of the entire oil-in-water cosmetic composition, it may contain 1 to 12 parts by weight or 2 to 12 parts by weight of fatty alcohol, or relative to 100 parts by weight of the entire composition, it may contain 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol, and 0.5 to 1.5 parts by weight of behenol. Alternatively, relative to 100 parts by weight of the entire composition, it may contain 1 to 7 parts by weight of octyldodecanol, 0.5 to 2 parts by weight of cetearyl alcohol, and 0.5 to 1 part by weight of behenol.

[0060] When the total content of the above three components exceeds 12 parts by weight, the stability of the oil-in-water composition may deteriorate. In particular, the poor stability over time may lead to changes in the physical properties of the composition.

[0061] In one embodiment of the present invention, experiments confirmed that, even compared to other fatty alcohols, when octyldodecyl alcohol, cetearyl alcohol, and behenol, or all of the octyldodecyl alcohol, cetearyl alcohol, and behenol, are combined with lecithin-based surfactants, the effect of removing turbidity in cosmetic compositions is the most superior. Specifically, in Table 2, when cetearyl alcohol alone, behenol alone, jojoba alcohol, or isostearyl alcohol are included, although combined with lecithin-based surfactants, the turbidity is not resolved at all due to a lightness value of 3 or higher according to general formula 1. When the fatty alcohol of the present invention is included, the lightness value is 1.5 or lower, thus showing the same or better turbidity reduction effect as the case where polydimethylsiloxane, as a conventional defoamer, is included.

[0062] Therefore, the water-in-oil cosmetic composition of the present invention, especially when it contains both the fatty alcohol and lecithin surfactants of the present invention in a cosmetic composition that contains natural emulsifiers while not containing polyethylene glycol (PEG) surfactants and / or silicone oil, thus exacerbating the turbidity phenomenon, can effectively remove the turbidity phenomenon of the composition, and the stability and absorbability of the emulsion also become significantly superior.

[0063] In this respect, the cosmetic composition of the present invention does not contain polyethylene glycol surfactants and / or silicone oil, thus providing a safe, water-in-oil cosmetic composition that does not cause or significantly reduces side effects such as skin toxicity or problems caused by the above-mentioned ingredients, is less irritating to the skin, has excellent spreadability, does not cause cloudiness, and has excellent skin absorption.

[0064] In particular, relative to 100 parts by weight of the total cosmetic composition, the cosmetic composition of the present invention may contain less than 0.1 parts by weight, or less than 0.01 parts by weight, or less than 0.001 parts by weight of polyethylene glycol surfactant and / or silicone oil. Preferably, the cosmetic composition may not contain polyethylene glycol surfactant and / or silicone oil.

[0065] As the aforementioned polyethylene glycol surfactant, it may be selected from the group consisting of PEG-100 stearate, PEG-150 distearate, PEG-10 polydimethylsiloxane, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-40 hydrogenated castor oil, PEG-120 methyl glucoside, PEG-7 glyceryl cocoate, PEG-7 hydrogenated castor oil, PEG-40 stearate, PEG-60 hydrogenated castor oil, and PEG-30 dihydroxystearate, but is not limited thereto.

[0066] The aforementioned silicone oil of the present invention may include all silicone-based fluid oils or silicone-based crosslinked polymers dispersed in the oil. As specific examples, silicone-based fluid oils include cyclopentasiloxane, cyclohexylsiloxane, cycloheptane, cyclopolymethylsiloxane, cyclophenylpolymethylsiloxane, cyclotetrasiloxane, cyclotrisiloxane, polydimethylsiloxane, octylpolydimethylsiloxane, octanoylpolytrimethylsiloxane, octanoylpolymethylsiloxane, cetearylpolymethylsiloxane, cetylpolymethylsiloxane, hexylpolymethylsiloxane, laurylpolymethylsiloxane, myristylpolymethylsiloxane, phenylpolymethylsiloxane, stearylpolymethylsiloxane, stearylpolydimethylsiloxane, trifluoropropylpolymethylsiloxane, cetylpolydimethylsiloxane, diphenylsiloxyphenylpolytrimethylsiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, methylpolytrimethylsiloxane, or phenylpolytrimethylsiloxane, etc. Furthermore, as a silicon-based crosslinked polymer, it includes, but is not limited to, all polydimethylsiloxane crosslinked polymers, polydimethylsiloxane / vinyl polydimethylsiloxane crosslinked polymers, polydimethylsiloxane PEG-10 / 15 crosslinked polymers, or PEG-12 polydimethylsiloxane / PPG-20 crosslinked polymers.

[0067] Furthermore, the aforementioned synthetic polymers refer to chemically synthesized polymers that are not derived from natural substances. More specifically, they refer to chemically synthesized polymers used as viscosity modifiers, stability improvers, or user experience improvers. For example, these could be synthetic viscosity modifiers, synthetic stabilizers, synthetic user experience improvers, or synthetic thickeners. Examples include, but are not limited to, the group consisting of carbomer, acrylate / C10-30 alkanol acrylate crosspolymers, ammonium acryloyldimethyl taurate / VP copolymers, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymers, polyacrylamide, polyacrylate-13, sodium polyacrylate, and VP / dimethylaminoethyl methacrylate copolymers.

[0068] In conventional cosmetics, the feel, cloudiness caused by bubbles, and formulation stability of oil-in-water emulsions can be maintained by using PEG surfactants or silicone oils. However, these ingredients are often excluded from cosmetics due to their negative effects, thus necessitating the development of alternatives. As alternatives to these synthetic surfactants, natural emulsifiers such as lecithin surfactants or cetearyl glucoside; cetearyl oleate and sorbitan oleate; polyglycerol-2-stearate; or sucrose stearate and sucrose tristearate have been proposed. However, compositions containing these natural emulsifiers exhibit reduced visual stability, decreased skin absorption, and exacerbated cloudiness on the skin surface, making it difficult to achieve satisfactory formulation properties as a cosmetic. This invention, however, solves the problems encountered in natural cosmetics by adding the aforementioned lecithin surfactants and fatty alcohols, and confirms that cosmetic compositions can provide improved visual stability, formulation fit, absorption, and cloudiness.

[0069] The water-in-oil cosmetic composition of the present invention may also contain fatty alcohols other than those described above, provided that the content of fatty alcohols is not more than 10 parts by weight relative to 100 parts by weight of the total composition.

[0070] The aforementioned additional fatty alcohol may be selected from, but is not limited to, stearyl alcohol, cetyl alcohol, and C12 to C22 fatty alcohols. The aforementioned fatty alcohol may be included for viscosity formation and formulation stability of the composition.

[0071] The water-in-oil cosmetic composition of the present invention may further comprise plant-based oils. These plant-based oils may be natural plant-derived oils that can be used in cosmetics, or they may be plant-based oils synthesized from natural plant-derived ingredients.

[0072] As a vegetable oil, avocado oil, wheat germ oil, rosehip oil, shea butter, almond oil, olive oil, macadamia nut oil, argan oil, meadowsweet oil, sunflower oil, castor oil, camellia oil, corn oil, safflower oil, soybean oil, rapeseed oil, macadamia nut oil, jojoba oil, palm oil, palm kernel oil, or coconut oil can be used, but are not limited to these.

[0073] The content of the above-mentioned plant oil can be 1 to 30 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition. When the content of plant oil is less than 1 part by weight, there is a problem of emulsifier and emulsifying aid precipitation, and when the content exceeds 30 parts by weight, it may hinder the stability of the cosmetic, thereby deteriorating its physical properties.

[0074] The water-in-oil cosmetic composition of the present invention may further comprise one or more components selected from the group consisting of emulsifiers and emulsifying aids. The aforementioned emulsifiers or emulsifying aids may be natural emulsifiers or natural emulsifying aids.

[0075] As an example, the natural emulsifier may be one or more selected from the group consisting of cetearyl glucoside, cetearyl oleate, sorbitan oleate, polyglycerol-2 stearate, sucrose stearate, and sucrose tristearate, but is not limited thereto. In addition to the lecithin surfactants of the present invention, a natural emulsifier may also be additionally included, but may be included to the extent that it does not impair the physical properties of the cosmetic.

[0076] As an example, the aforementioned natural emulsifying agent may be glyceryl stearate, but is not limited thereto. The content of the aforementioned natural emulsifying agent may be 1 to 9 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

[0077] For the cosmetic composition of the present invention, the lightness value calculated according to the following general formula 1 after measuring the skin lightness with a colorimeter can be less than 1.5. Preferably, the lightness value can be less than 1.0.

[0078] [General Formula 1]

[0079]

[0080] The cosmetic composition of the present invention can provide a composition that does not exhibit cloudiness caused by air bubbles when applied to the skin and has excellent skin absorption and adherence by comprising a combination of lecithin surfactants and fatty alcohols. This effect can be confirmed by lightness values ​​using a colorimeter, and the composition of the present invention comprising a combination of lecithin surfactants and fatty alcohols has the following characteristic: the value obtained by subtracting the value of A1 from the lightness value (A2) measured after applying the cosmetic to the skin relative to the lightness value (A1) before applying the cosmetic to the skin, multiplied by 100, is less than 1.5.

[0081] The above colorimeter evaluation can be obtained by measuring skin brightness (lightness) with a colorimeter (MINOLTASPECTROPHOTOMETER CM-3700d) after rolling it on the skin 20 times under the following conditions: measurement wavelength interval of 10nm; measurement light source: pulsed xenon lamp; transmitted color measurement mode d / 0 (diffuse illumination / 0° received light); and interface standard RS-232C.

[0082] When the water-in-oil cosmetic of the present invention is measured under the above conditions, when the lightness value shown in Formula 1 meets the condition of being less than 1.5, specific experiments confirm that the composition has the following characteristics: no turbidity and excellent stability and absorption.

[0083] The compositions of the present invention may include natural raw materials comprising the above-mentioned natural polymers, wherein the content of the natural raw materials is 95% or more of the total weight of the composition.

[0084] The aforementioned natural polymers, as an example of natural raw materials, refer to those obtained from natural substances or organic materials, or those that are simply modified from natural substances or organic materials, or those that contain synthetic components from naturally derived components, and exclude chemically synthesized components synthesized by artificial methods (which are not naturally derived components).

[0085] As an example, the aforementioned natural raw materials can refer to cosmetic raw materials that meet national organic standards and environmental certification levels, or have a natural source level that matches them.

[0086] The aforementioned natural or naturally derived raw materials refer to organic raw materials, plants and plant-derived raw materials, animals and animal-derived raw materials, minerals and mineral-derived raw materials, and water, among other components. For example, these may include, but are not limited to, microcrystalline cellulose, cellulose gum, sclerotium gum, xanthan gum, gum arabic, gellan gum, rhizobium gum, carrageenan gum, and sodium hyaluronate.

[0087] The aforementioned environmental certification standards, which cover compositions made from ingredients cultivated and processed using environmentally friendly methods and excluding synthetic processes, include representative environmental certifications such as ecocert (France), Cosmos (Europe), USDA (USDepartment of Agreculture) (USA), BDIH (Association of German Industries and Trading Firms) (Germany), and JAS (Japanese Association of Standards) (Japan). These standards align with consumer demand for increasingly environmentally friendly products, and various countries are widely implementing environmental certification systems to certify the safety of ingredients or products. While there are differences in detailed values ​​and scope among countries, there is global uniformity in the scope of environmental certification for the primary components of raw materials and ingredients. Naturally derived ingredients are included in the scope of environmentally friendly organic ingredients, and other semi-processed ingredients are classified into PPAI (Physically Processed Agro Ingredient) and CPAI (Chemically Processed Agro Ingredient), thus only raw materials that meet these standards are awarded ecocert, Cosmos, or USDA certifications.

[0088] In this invention, nationally certified organic and environmentally friendly raw materials and ingredients refer to cosmetic raw materials and compositions that consist solely of ingredients that meet or can meet nationally established organic and environmental certification standards, thereby satisfying nationally established organic and environmental standards. For example, it refers to those ingredients that consist solely of ingredients that meet or can meet standards set by the Chinese government or Chinese-recognized organic and environmental certification standards.

[0089] In addition to the above-described composition, the cosmetic composition according to the present invention may also contain purified water and additional oil phase components. The content of the oil phase components is not particularly limited, and they may be included in the composition in the remaining amount besides the fatty alcohols, lecithin surfactants, and purified water.

[0090] Specifically, the cosmetic composition of the present invention may contain one or more oils or waxes as oil phase components. The oils and waxes described above can be any of those commonly used as cosmetic ingredients in the art. For example, ester oils, triglyceride oils, hydrocarbon oils, or plant oils can be used as the oils described above, and, as needed, one or more of these components can be used in combination.

[0091] As the aforementioned waxes, all waxes commonly used in cosmetics, such as hydrocarbon waxes, plant-based waxes, or silicone waxes, can be used. For example, they may include candelilla wax, carnauba wax, rice wax, beeswax, lanolin, ceresin wax, pure ceresin wax, paraffin wax, microcrystalline wax, synthetic wax, polyglycerol-3 beeswax ester, rose wax, rice bran wax, unsaponifiables of olive oil, C30-C45 alkyl dimethylsilyl polypropylene silsesquioxane, ethylene / propylene copolymer, or polyethylene wax, but are not limited to these.

[0092] Furthermore, the cosmetic composition of the present invention may further include various ingredients that can be used in ordinary cosmetics, such as moisturizers, UV blockers, neutralizers, thickeners, fragrances, preservatives, antioxidants, or pigments.

[0093] More specifically, the water-in-oil cosmetic composition of the present invention may contain one or more selected from the group consisting of solvents, thickeners, humectants, and solvents in the aqueous phase mixture; and lecithin surfactants and fatty alcohols in the oil phase mixture. The oil phase mixture may also contain one or more selected from the group consisting of emulsifying agents, preservatives, and vegetable oils.

[0094] According to a more specific embodiment of the present invention, the water-in-oil cosmetic composition of the present invention may contain xanthan gum, glycerin, and butylene glycol in the aqueous phase mixture; and lecithin surfactants and octyldodecyl alcohol in the oil phase mixture; cetearyl alcohol and behenol; octyldodecyl alcohol and cetearyl alcohol; octyldodecyl alcohol and behenol; or fatty alcohols of octyldodecyl alcohol, cetearyl alcohol and behenol, and vegetable oils.

[0095] Relative to 100 parts by weight of the total composition, the composition may contain 0.1 to 0.5 parts by weight of xanthan gum; 5.0 to 11.0 parts by weight of glycerin; 1.0 to 5.0 parts by weight of butylene glycol; 0.1 to 5 parts by weight of lecithin surfactant; 1 to 12 parts by weight of fatty alcohol; 1.0 to 10.0 parts by weight of olive oil; and the balance being purified water.

[0096] Furthermore, the above composition may contain 1 to 7 parts by weight of octyldodecanol; 0.5 to 3 parts by weight of cetearyl alcohol and 0.5 to 1.5 parts by weight of behenol; 1 to 7 parts by weight of octyldodecanol and 0.5 to 3 parts by weight of cetearyl alcohol; 1 to 7 parts by weight of octyldodecanol and 0.5 to 1.5 parts by weight of behenol; or 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol and 0.5 to 1.5 parts by weight of behenol as fatty alcohols. In one embodiment of the present invention, experiments confirmed that the water-in-oil composition contained within the above range has excellent stability, does not exhibit turbidity, and has excellent skin spreadability and adhesion.

[0097] Preferably, each of the above-mentioned ingredients included in the cosmetic composition according to the present invention can be included in the cosmetic composition of the present invention within a range not exceeding the maximum usage specified in the "Cosmetic Safety Technical Specifications" formulated by the Chinese government.

[0098] The cosmetic compositions according to the present invention can also be prepared in any dosage form commonly prepared in this field. For example, the cosmetic compositions described above can have the following dosage forms: lotions such as softening lotions or nourishing lotions, spray-type lotions, lotions such as facial lotions and body lotions, creams such as nourishing creams, moisturizing creams, and eye creams, sticks, serums, cosmetic ointments, balms, sprays, gels, masks, or powders. Moreover, the cosmetic compositions of the present invention can be included in cosmetics or products such as sunscreens, primers, liquid or spray-type foundations, powders, makeup removers such as facial cleansers and makeup remover oils, and cleansers such as facial washes, soaps, and shower gels, but are not limited thereto.

[0099] In one specific example, the above-mentioned cosmetic composition may be an oil-in-water (O / W) cosmetic composition.

[0100] The cosmetic composition of the present invention can be used according to conventional methods, and the frequency of use can be varied according to the user's skin condition or preference.

[0101] Furthermore, the present invention can relate to the use of cosmetic compositions for preparing cosmetics. To avoid repeating the description of the use of cosmetic compositions for preparing cosmetics according to the present invention, the above description of the cosmetic compositions can be continued.

[0102] The aforementioned cosmetics can be ordinary cosmetics, natural cosmetics, low-irritant cosmetics, or organic cosmetics.

[0103] Furthermore, this invention provides a method for preparing an oil-in-water cosmetic composition. The cosmetic composition prepared by the method of this invention has the following advantages: excellent stability over time, thereby improving preparation efficiency and product storage efficiency. Moreover, it has the advantage of not exhibiting cloudiness, thus satisfying consumer preferences when preparing cosmetics.

[0104] The method for preparing the water-in-oil cosmetic composition of the present invention includes:

[0105] Add the thickener to the solvent and disperse for 10 to 50 minutes;

[0106] A water-soluble raw material is added to the above dispersion and heated to 50°C to 100°C to prepare an aqueous mixture;

[0107] An oil phase mixture is prepared by mixing octyldodecyl alcohol or two or more fatty alcohols selected from the group consisting of octyldodecyl alcohol, cetearyl alcohol and behenyl alcohol, and lecithin surfactants and heating to 50°C to 100°C.

[0108] At 50°C to 100°C, the oil phase mixture is added to the above aqueous phase mixture, and emulsified using a homogenizer at 2000 to 4000 rpm for 5 to 30 minutes; and

[0109] The emulsified oil-water mixture was cooled to 20 to 30°C and defoamed. The oil-in-water composition prepared according to the method of the present invention exhibits excellent stability over time, and the problem of turbidity is improved, thus it can be effectively used in cosmetics.

[0110] The above preparation method may further include: adding one or more of the group selected from the group consisting of ultraviolet blocking agents, neutralizing agents, thickeners, fragrances, antioxidants, pigments, solvents, humectants and preservatives to the oil-water phase mixture, and emulsifying it at 2000 to 4000 rpm for 5 to 30 minutes using a homogenizer.

[0111] The solvents mentioned above include, but are not limited to, those commonly used in the technical field of this invention. For example, it could be pure water, but it is not limited thereto.

[0112] The aforementioned water-soluble raw materials may include solvents and / or humectants. These solvents and humectants may include, but are not limited to, those commonly used in the technical field of this invention.

[0113] The above-mentioned oil phase mixture can be prepared by further comprising one or more of the group consisting of emulsifying agents, preservatives and vegetable oils.

[0114] In the above-mentioned preparation steps of the oil phase mixture, for fatty alcohols and lecithin surfactants, 0.1 to 10 parts by weight of lecithin surfactants and 0.5 to 12 parts by weight of fatty alcohols may be included relative to 100 parts by weight of the total oil-in-water cosmetic composition.

[0115] The aforementioned fatty alcohols may include octyldodecanol, cetearyl alcohol, and behenol. For the aforementioned octyldodecanol, cetearyl alcohol, and behenol, relative to 100 parts by weight of the total oil-in-water cosmetic composition, it may comprise 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol, and 0.5 to 1.5 parts by weight of behenol.

[0116] The above-mentioned oil phase mixture can be prepared by further including vegetable oil, and the above-mentioned vegetable oil can be included in an amount of 1 to 30 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

[0117] The above-mentioned oil phase mixture can be prepared by further including a natural emulsifying agent, and the above-mentioned natural emulsifying agent can be included in an amount of 1 to 9 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

[0118] For the preparation method of the water-in-oil cosmetic composition of the present invention, in order to avoid repetition, the above description of the cosmetic composition and its use can be repeated.

[0119] The advantages and features of the present invention, as well as the methods for achieving them, will become clear upon referring to the detailed experimental and preparation examples described below. However, the present invention is not limited to the experimental and preparation examples disclosed below, but can be implemented in many different forms, and is provided merely to complete the disclosure of the invention and to fully illustrate the scope of the invention to those skilled in the art.

[0120] Invention Effects

[0121] The cosmetic compositions according to the present invention solve the problems of turbidity and unpleasant user experience in conventional compositions containing natural polymers that do not use polyethylene glycol surfactants or synthetic defoamers such as silicone oil. They provide cosmetic compositions with improved skin adhesion, stability, and skin absorption, and reduced turbidity. Therefore, they have the following advantages: by eliminating synthetic raw materials, not only can consumer concerns about harmful ingredients be eliminated, but also natural cosmetics, low-irritant cosmetics, or organic cosmetics with improved quality and stability to the level of ordinary cosmetic products can be provided. Attached Figure Description

[0122] Figure 1 These are photographs comparing the opacity of cosmetic compositions according to an embodiment of the present invention. Detailed Implementation

[0123] The present invention will now be described in detail through the following embodiments. However, the following embodiments are merely illustrative of the present invention, and the scope of the present invention is not limited to the following embodiments.

[0124] Preparation Example 1. Preparation of Water-in-Oil Cosmetic Compositions

[0125] The water-in-oil cosmetic compositions of Comparative Examples 1 to 4 were prepared using the compositions shown in Table 1 below. All contents in Table 1 are expressed in parts by weight, and the specific preparation methods are as follows:

[0126] 1. Slowly add raw material 2 (xanthan gum) to raw material 1 (purified water), then disperse it for 30 minutes using a disperser. Then add raw material 3 (glycerol) and raw material 4 (butanediol), and heat to 75°C.

[0127] 2. Oil phase: Mix the components of raw materials 5 to 7 and 13 and raw materials 8 to 12 that conform to each composition example, and then heat to 75°C.

[0128] 3. Slowly add the second oil phase mixture to the first aqueous phase mixture at 75°C and emulsify at 3000 rpm for 10 minutes using a homogenizer.

[0129] 4. Cool to 50°C, then add raw material 14 and mix for 5 minutes at 3000 rpm using a homogenizer.

[0130] 5. Cool the emulsified mixture to 30°C and then degas it.

[0131] [Table 1]

[0132]

[0133] Furthermore, water-in-oil cosmetic compositions of Examples 1, 2, and Comparative Examples 5 to 8 were prepared using the compositions shown in Table 2 below. All contents in Table 2 are expressed in parts by weight, and the specific preparation methods are as follows:

[0134] 1. Slowly add raw material 2 (xanthan gum) to raw material 1 (purified water), then disperse it for 30 minutes using a disperser. Add raw material 3 (glycerol) and raw material 4 (butanediol), and then heat to 75°C.

[0135] 2. Oil phase: Mix the components of raw materials 5 to 9 that conform to each composition example and raw materials 10 to 12, and then heat to 75°C.

[0136] 3. Slowly add the second oil phase mixture to the first aqueous phase mixture at 75°C and emulsify at 3000 rpm for 10 minutes using a homogenizer.

[0137] 4. Cool to 50°C, then add raw material 13 (preservative) and mix at 3000 rpm for 5 minutes using a homogenizer.

[0138] 5. Cool the mixture from step 4 above to 30°C, and then degas it.

[0139] [Table 2]

[0140]

[0141] Experimental Example 1. Evaluation of Turbidity

[0142] The turbidity of the compositions of Comparative Examples 1 to 4 prepared in Preparation Example 1 above was evaluated.

[0143] Evaluation criteria

[0144] 1) Visual evaluation: After preparation, roll it on the skin 10 times, and then evaluate the degree of turbidity formation with the naked eye.

[0145] ○: Almost none, △: Normal, X: Triggered, XX: Highly Triggered

[0146] 2) Colorimeter evaluation: Roll the sample 20 times on the skin, then use a colorimeter (MINOLTA SPECTROPHOTOMETERCM-3700d) to evaluate the skin's brightness (lightness).

[0147] [Table 3]

[0148] Measurement wavelength interval 10nm Measuring light source Pulse Xenon Lamp Transmission color measurement method d / 0 (Diffuse illumination / 0° received light) Interface RS-232C standard

[0149] [General Formula 1]

[0150]

[0151] [Table 4]

[0152] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Visual assessment (turbidity) X X XX XX Brightness value 3.1 2.8 5.2 6.3

[0153] As shown in Table 4 above, it can be confirmed that the lightness value evaluated by the colorimeter and the turbidity evaluated by the naked eye show similar results. For Comparative Examples 1 to 4, which contain natural emulsifiers, it can be confirmed that the lightness value is 2.8 or higher, and therefore a lot of turbidity will appear when rolled on the skin. In particular, for Comparative Examples 3 and 4, the more the emulsion is rolled on the skin, the less it is absorbed and the turbidity increases significantly.

[0154] [Table 5]

[0155] Example 1 Example 2 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 visual evaluation ○ △ XX X XX XX Brightness value 0.32 0.80 6.1 3.2 6.5 7.2

[0156] Furthermore, as shown in Table 5 above, it can be confirmed that the lightness values ​​evaluated by the colorimeter and the turbidity evaluated by the naked eye show similar results. For Comparative Examples 5 to 8, a significant amount of turbidity occurred when rolled on the skin. In particular, for Comparative Examples 5, 7, and 8, the turbidity increased with rolling on the skin, and absorption was poor. On the other hand, compared to Comparative Examples 5 to 8, the composition of Example 1 containing octyldodecyl alcohol (which is one of the fatty alcohols) or the composition of Example 2 containing cetearyl alcohol and behenol showed significantly lower lightness values, and no turbidity was observed by the naked eye.

[0157] Preparation Example 2. Preparation of Water-in-Oil Cosmetic Compositions

[0158] Furthermore, the water-in-oil cosmetic compositions of Examples 3 to 4 and Comparative Example 9 were prepared using the compositions shown in Table 6 below. All contents in Table 6 are expressed in parts by weight, and the specific preparation methods are as follows:

[0159] 1. Slowly add raw material 2 (xanthan gum) to raw material 1 (purified water), then disperse it for 30 minutes using a disperser. Add raw material 3 (glycerol) and raw material 4 (butanediol), and then heat to 75°C.

[0160] 2. Oil phase: Mix the components of raw materials 9 to 11 that conform to each composition example with raw materials 5 to 8, and then heat to 75°C.

[0161] 3. Slowly add the second oil phase mixture to the first aqueous phase mixture at 75°C and emulsify at 3000 rpm for 10 minutes using a homogenizer.

[0162] 4. Cool to 50°C, then add raw material 12 (preservative) and mix at 3000 rpm for 5 minutes using a homogenizer.

[0163] 5. Cool the mixture from step 4 above to 30°C, and then degas it.

[0164] [Table 6]

[0165]

[0166] Experimental Example 2. Evaluation of the long-term stability and turbidity of emulsions.

[0167] The stability and turbidity of the water-in-oil cosmetic composition prepared in Preparation Example 2 above were evaluated over time.

[0168] 1) Stability evaluation method for emulsified particles over time

[0169] The stability of the dosage form was visually evaluated on day 1 and day 30 after preparation at 25°C, 50°C, and under cycle conditions. The cycle was performed by varying the storage temperature from -15°C to 45°C in 12-hour intervals.

[0170] <Evaluation Criteria>

[0171] ◎: Stable, X: Unstable

[0172] The results of stability and particle size over time are shown in Table 7 below.

[0173] [Table 7]

[0174]

[0175] For Examples 3 to 5, it was visually confirmed that stability was maintained under all conditions without phase separation, both immediately after preparation and even after 30 days. Furthermore, it can be seen that the compositions of Examples 3 to 5, even those containing natural ingredients, exhibit excellent stability, reaching levels similar to those containing conventional silicone oils.

[0176] 2) Evaluate turbidity

[0177] The turbidity of the water-in-oil cosmetic composition prepared in Preparation Example 2 was evaluated under the same conditions as described in Experimental Example 1.

[0178] [Table 8]

[0179] Example 3 Example 4 Example 5 Comparative Example 9 visual evaluation ○ ○ ○ ○ Brightness value 0.22 0.23 0.18 0.32

[0180] As shown in Table 8, it can be confirmed that the lightness values ​​evaluated using a colorimeter show results similar to those evaluated by the naked eye. For Comparative Example 9, which contains polydimethylsiloxane (primarily used as an antifoaming agent in common water-in-oil formulations), it can be confirmed that almost no turbidity occurs, and the compositions of Examples 3 to 5 of the present invention show similar levels to Comparative Example 9 in both naked eye evaluation and lightness values. In particular, it was confirmed that the lightness values ​​of the compositions of Examples 3 to 5 are less than 1 even when containing natural ingredients, thus demonstrating that the turbidity of the compositions is excellent when the present invention simultaneously contains octyldodecyl alcohol, cetearyl alcohol, and behenyl alcohol. Moreover, it can be seen that the turbidity suppression effect is even better with increasing fatty alcohol content. Therefore, it can be seen that the compositions of the present invention do not exhibit turbidity when rolled on the skin at the level of conventional formulations containing antifoaming agents and are absorbed quickly.

[0181] Experimental Example 4. Evaluating the Adhesion of Emulsions

[0182] The adhesion of the water-in-oil cosmetic compositions prepared in Examples 3 to 5 and Comparative Example 9 prepared in Preparation Example 2 above was evaluated.

[0183] Evaluation criteria

[0184] 1) Evaluation of elasticity (fit): After preparation, the fit was evaluated by rolling it on the skin 10 times (n=10, with women aged 20-40 as subjects).

[0185] ○: Good, △: Normal, X: Almost none

[0186] 2) Fit Evaluation: After applying the product to the leather, measure the skin (leather) friction coefficient.

[0187] [Table 9]

[0188]

[0189] [Table 10]

[0190] Example 3 Example 4 Example 5 Comparative Example 9 visual evaluation ○ ○ ○ ○ Fit 0.37 0.41 0.55 0.38

[0191] As shown in Table 10, the fit (average friction) showed a similar tendency to the fit evaluation results. Furthermore, it was confirmed that the fit increased with increasing fatty alcohol content, thus showing a similar tendency to suppress turbidity. For the compositions of Examples 3 to 5 of the present invention, a silky and well-fitting evaluation was confirmed, which was significantly superior to Comparative Example 9, which contained polydimethylsiloxane (which is mainly used as an antifoaming agent in common water-in-oil formulations).

Claims

1. A water-in-oil cosmetic composition comprising: Hydrogenated lecithin; and fatty alcohols, in, The aforementioned fatty alcohol is octyldodecyl alcohol; or octyldodecyl alcohol, cetearyl alcohol, and behenyl alcohol. The above cosmetic composition contains less than 0.01% by weight of polyethylene glycol surfactants and / or silicone oil, or does not contain polyethylene glycol surfactants and / or silicone oil. The composition comprises, relative to 100 parts by weight, 0.1 to 10 parts by weight of hydrogenated lecithin and 0.5 to 12 parts by weight of fatty alcohol.

2. The water-in-oil cosmetic composition according to claim 1, wherein, The composition comprises, relative to 100 parts by weight, 0.1 to 5 parts by weight of hydrogenated lecithin and 1 to 12 parts by weight of fatty alcohol.

3. The water-in-oil cosmetic composition according to claim 2, wherein, The oil-in-water cosmetic composition contains 0.1 to 4 parts by weight of hydrogenated lecithin and 2 to 12 parts by weight of fatty alcohol, relative to 100 parts by weight of the total water-in-oil cosmetic composition.

4. The water-in-oil cosmetic composition according to claim 3, wherein, The oil-in-water cosmetic composition comprises, relative to 100 parts by weight, 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol and 0.5 to 1.5 parts by weight of behenol.

5. The water-in-oil cosmetic composition according to any one of claims 1 to 4, wherein, The above-mentioned water-in-oil cosmetic composition also contains plant-based oils.

6. The water-in-oil cosmetic composition according to claim 5, wherein, The content of the above-mentioned plant oil is 1 to 30 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

7. The water-in-oil cosmetic composition according to any one of claims 1 to 4, wherein, The above-mentioned water-in-oil cosmetic composition further comprises one or more of the group consisting of natural emulsifiers and natural emulsifying aids.

8. The water-in-oil cosmetic composition according to claim 7, wherein, The content of the above-mentioned natural emulsifying agent is 1 to 9 parts by weight relative to 100 parts by weight of the total water-in-oil cosmetic composition.

9. The water-in-oil cosmetic composition according to any one of claims 1 to 4, wherein, After measuring the skin lightness using a colorimeter, the lightness value calculated according to the following general formula 1 is less than 1.

5. [General Formula 1] 10. The water-in-oil cosmetic composition according to any one of claims 1 to 4, wherein, The dosage forms of the above cosmetic compositions are toners, cleansers, oils, lotions, creams, sticks, serums, cosmetic ointments, balms, sprays, gels, masks, or powders.

11. A method for preparing a water-in-oil cosmetic composition, comprising: Add the thickener to the solvent and disperse for 10 to 50 minutes; A water-soluble raw material is added to the above dispersion and heated to 50°C to 100°C to prepare an aqueous mixture; Mixed fatty alcohols; And hydrogenated lecithin, and heated to 50°C to 100°C to prepare an oil phase mixture; At 50°C to 100°C, the oil phase mixture is added to the above aqueous phase mixture, and emulsified using a homogenizer at 2000 to 4000 rpm for 5 to 30 minutes; and The emulsified oil-water mixture was cooled to 20 to 30°C and defoamed. Among them, the aforementioned fatty alcohol is octyldodecyl alcohol; or octyldodecyl alcohol, cetearyl alcohol, and behenyl alcohol. The above cosmetic composition contains less than 0.01% by weight of polyethylene glycol surfactants and / or silicone oil, or does not contain polyethylene glycol surfactants and / or silicone oil. In the above-mentioned preparation steps of the oil phase mixture, relative to 100 parts by weight of the total water-in-oil cosmetic composition, it contains 0.1 to 10 parts by weight of hydrogenated lecithin and 0.5 to 12 parts by weight of fatty alcohol.

12. The method for preparing the water-in-oil cosmetic composition according to claim 11, wherein, In the preparation steps of the above-mentioned oil phase mixture, relative to 100 parts by weight of the total water-in-oil cosmetic composition, it contains 0.1 to 5 parts by weight of hydrogenated lecithin and 1 to 12 parts by weight of fatty alcohol.

13. The method for preparing the water-in-oil cosmetic composition according to claim 11, wherein, The oil-in-water cosmetic composition comprises, relative to 100 parts by weight, 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol and 0.5 to 1.5 parts by weight of behenol.

14. The method for preparing the water-in-oil cosmetic composition according to any one of claims 11 to 13, wherein, When performing the preparation step of the oil phase mixture, 1 to 30 parts by weight of vegetable oil are also included relative to 100 parts by weight of the total water-in-oil cosmetic composition.

15. The method for preparing the water-in-oil cosmetic composition according to any one of claims 11 to 13, wherein, When performing the preparation step of the oil phase mixture, 1 to 9 parts by weight of a natural emulsifying agent are also included relative to 100 parts by weight of the total oil-in-water cosmetic composition.

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