Cosmetic composition for blocking ultraviolet rays with excellent blocking effect against a wide range of UV rays and cosmetic cushion containing the same

Abstract

The present invention relates to a cosmetic composition for UV protection that exhibits excellent blocking efficacy against a wide range of ultraviolet rays. Specifically, by optimally combining an organic UV blocker, an inorganic UV blocker, and a water-based thickener, the potency of the UV blocker is maintained over time even when impregnated into a cushion, thereby enabling excellent UV protection efficacy for a long period. Furthermore, the invention relates to a cosmetic composition for UV protection that exhibits excellent blocking efficacy against a wide range of ultraviolet rays by stabilizing various types of UV blockers within the formulation.

Description

Technology Field

[0001] The present invention relates to a cosmetic composition for UV protection that exhibits excellent blocking efficacy against a wide range of ultraviolet rays. Specifically, by optimally combining an organic UV blocker, an inorganic UV blocker, and a water-based thickener, the potency of the UV blocker is maintained over time even when impregnated into a cushion, thereby enabling excellent UV protection efficacy for a long period. Furthermore, the invention relates to a cosmetic composition for UV protection that exhibits excellent blocking efficacy against a wide range of ultraviolet rays by stabilizing various types of UV blockers within the formulation. Background Technology

[0002] Ultraviolet (UV) rays reaching the Earth's surface from the sun have short wavelengths and high energy, so even short-term exposure can cause phenomena such as skin aging and wrinkles. Ultraviolet A (UVA; wavelengths in the 320 to 400 nm range), classified as long-wavelength UV rays, is known to reach the dermis layer of the skin due to its longer wavelength compared to other ranges, causing tanning and long-term skin damage associated with aging. Ultraviolet B (UVB; wavelengths in the 280 to 320 nm range) is a ray that directly affects the skin adversely, causing tanning and skin cancer. Ultraviolet C (UVC; wavelengths below 280 nm), the shortest range of UV rays, is the most energetic type; although very little reaches the Earth's surface because it is completely absorbed by the ozone layer, it is known to cause burns, skin cancer, and cataracts upon human exposure.

[0003] Therefore, countless types of sunscreen products have been released to protect the skin from such ultraviolet rays.

[0004] There is a concern that the effectiveness of sunscreen products may decrease if they are exposed to sunlight outdoors or remain on the skin for extended periods. Therefore, reapplying sunscreen even during daily activities is effective for protecting the skin from UV rays. However, liquid sunscreens are very inconvenient to apply outdoors, and for women, there are issues such as makeup breaking down during the application process, requiring touch-ups. To address these issues, there is a need for products like sun cushions that can provide effective UV protection.

[0005] However, when sunscreen is applied to a sun cushion, the sunscreen adheres to the cushion over time, so there is a concern that the product's UV protection efficacy may decrease simply by storing it for a long period.

[0006] The inventors, as a result of continuing research to solve the above-mentioned problems, confirmed that it is possible to realize a cosmetic composition capable of stabilizing oil-based organic sunscreens, water-based organic sunscreens, and inorganic sunscreens all within an emulsion formulation, while ensuring that the efficacy of the sunscreen does not decrease even when impregnated into a cushion such as a sponge, thereby exhibiting long-term blocking efficacy against ultraviolet rays across a wide wavelength range, thereby completing the present invention. Prior art literature

[0007] (Patent Document 0001) KR 10-2022-0054447 A The problem to be solved

[0008] The present invention aims to provide a cosmetic composition for UV protection that has excellent blocking efficacy against a wide range of ultraviolet rays by significantly improving the time-dependent stability of various UV blockers.

[0009] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0010] According to an embodiment of the present invention, a cosmetic composition for sunscreen is provided, comprising an organic sunscreen, an inorganic sunscreen, and an aqueous thickening agent, wherein the organic sunscreen comprises at least one of polysilicon-15, methylene bis-benzotriazolyl tetramethylbutylphenol, and terephthalylidene dicamphor sulfonic acid.

[0011] In addition, the methylenebis-benzotriazolyltetramethylbutylphenol may be included in an amount of 0.2 to 3 weight percent based on the total weight of the cosmetic composition for UV protection.

[0012] In addition, the terephthalilylidendicampersulfonic acid may be included in an amount of 0.5 to 6.5 weight% based on the total weight of the cosmetic composition for UV protection.

[0013] In addition, the polysilicon-15 may be included in an amount of 0.01 to 10 weight percent based on the total weight of the cosmetic composition for UV protection.

[0014] In addition, the above aqueous thickener may include an acrylate-based thickener.

[0015] In addition, the above acrylate-based thickener may include polyacrylate crosspolymer-6.

[0016] In addition, the above-mentioned acrylate-based thickener may be included in an amount of 0.001 to 2 weight percent based on the total weight of the above-mentioned sunscreen cosmetic composition.

[0017] In addition, the above aqueous thickening agent may further include poloxamer.

[0018] In addition, the poloxamer may be included in an amount of 0.01 to 5 weight percent based on the total weight of the cosmetic composition for UV protection.

[0019] In addition, the above-mentioned inorganic sunscreen may include at least one of titanium dioxide and zinc oxide.

[0020] In addition, the above-mentioned cosmetic composition for UV protection may be a water-in-oil (W / O) formulation or a water-in-silicon (W / S) formulation.

[0021] In addition, the above-mentioned cosmetic composition for UV protection may be used for impregnating cosmetic cushions.

[0022] In addition, the above-mentioned cosmetic composition for UV protection may be at least one emulsion formulation among cream, lotion, fluid, and gel formulations.

[0023] According to another embodiment of the present invention, a cosmetic cushion impregnated with the above-described ultraviolet blocking cosmetic composition is provided. Effects of the invention

[0024] The cosmetic composition for UV protection of the present invention stabilizes various types of organic and inorganic UV blockers within the formulation, thereby enabling excellent blocking efficacy against a wide range of ultraviolet rays.

[0025] In addition, the above-mentioned cosmetic composition for UV protection has excellent stability over time, so even when impregnated into a cushion or the like, the potency of the UV blocker is maintained, allowing it to exhibit excellent UV protection efficacy for a long period, and it may be suitable for application in products such as sun cushions.

[0026] In addition, due to the above-mentioned stability over time, it may be suitable to be provided as at least one emulsion formulation among cream, lotion, fluid, and gel formulations.

[0027] In addition, the above cosmetic composition can significantly improve the whitening effect while containing a high concentration of inorganic sunscreen, and can be easy to use as it has little stickiness even when applying a high concentration of sunscreen.

[0028] In addition, the cosmetic composition includes a sunscreen ingredient in both the continuous phase and the dispersed phase within the emulsion formulation, thereby reducing variations in sunscreen efficacy due to the size of the emulsion particles and enabling uniform sunscreen efficacy. Specific details for implementing the invention

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a skilled expert in the art to which the present invention pertains. In general, the nomenclature used herein is well known and commonly used in the art. Furthermore, in describing embodiments of the present invention, detailed descriptions of related known components or functions are omitted if it is determined that such detailed descriptions would hinder understanding of the embodiments of the present invention. Additionally, while embodiments of the present invention will be described below, the technical concept of the present invention is not limited or restricted thereto and can be modified and implemented in various ways by those skilled in the art.

[0030] In this specification, when a part is described as including a certain component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. In this specification, the term "and / or" includes a combination of a plurality of related items or any one of a plurality of related items.

[0032] According to an embodiment of the present invention, a cosmetic composition for sunscreen in the form of an emulsion is provided, comprising an organic sunscreen, an inorganic sunscreen, and an aqueous thickener, wherein the organic sunscreen comprises at least one of polysilicon-15, methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), and terephthalylidene dicamphor sulfonic acid (TDSA). The inventors have confirmed that by including a specific aqueous thickener, the organic sunscreen and the inorganic sunscreen can be stabilized over time within the formulation to maintain the potency of the sunscreen. In particular, when a composition containing a sunscreen is impregnated into a sponge or cushion, the potency of the organic sunscreen tends to drop significantly; however, the sunscreen cosmetic composition of the present invention can maintain the potency of the sunscreen over time even when impregnated into a sponge or cushion.

[0033] Polysilicon-15 is a component having a structure as shown in Chemical Formula 1 below, and has excellent UV blocking efficacy in the wavelength range of 270 to 330 nm. The inventors have confirmed that the polysilicon-15 is not easily adsorbed onto sponges or cushions. Therefore, even if a cosmetic composition for UV blocking containing the polysilicon-15 is impregnated into a sponge or cushion, the potency of the polysilicon-15 can be maintained over time similar to that immediately after manufacturing.

[0034]

[0035] In one embodiment, polysilicon-15 may be included in an amount of 0.01 to 10 weight% based on the total weight of the cosmetic composition for UV protection, specifically 0.05 to 5 weight%, and more specifically 0.1 to 2 weight%. When polysilicon-15 is included in the above amount, the potency of polysilicon-15 is maintained over time and the UV protection efficacy may be excellent. However, it is not limited thereto.

[0036] In one embodiment, polysilicon-15 may be applied to the oil phase of the UV-blocking cosmetic composition of the present invention. The polysilicon-15 is an oil-soluble UV-blocking ingredient and can exhibit excellent UV-blocking efficacy when applied to the oil phase.

[0037] The inventors confirmed that by optimally combining an aqueous thickening agent, the time-dependent stability of the methylenebis-benzotriazolyltetramethylbutylphenol and the terephthalilylidendicampersulfonic acid can also be improved.

[0038] Methylenebis-benzotriazolyltetramethylbutylphenol is a component having a structure as shown in Chemical Formula 2 below, and has excellent UV blocking efficacy in the wavelength range of 300 to 360 nm. The methylenebis-benzotriazolyltetramethylbutylphenol is stable over time within the UV-blocking cosmetic composition of the present invention, so even if the UV-blocking cosmetic composition of the present invention is impregnated into a sponge or cushion, the potency of methylenebis-benzotriazolyltetramethylbutylphenol can be maintained over time similar to that immediately after manufacturing.

[0039]

[0040] In one embodiment, methylenebis-benzotriazolyltetramethylbutylphenol may be included in an amount of 0.2 to 3 weight% based on the total weight of the cosmetic composition for UV protection, specifically in an amount of 0.3 to 3 weight%. When methylenebis-benzotriazolyltetramethylbutylphenol is included in the above amount, the formulation may be stable over time and exhibit excellent UV protection efficacy. However, it is not limited thereto.

[0041] In one embodiment, methylenebis-benzotriazolyltetramethylbutylphenol may be applied to the aqueous phase of the cosmetic composition for UV protection according to the present invention. The methylenebis-benzotriazolyltetramethylbutylphenol is a water-dispersible UV blocking agent and can exhibit excellent UV blocking efficacy when applied to the aqueous phase.

[0042] Terephthalilylidendicampersulfonic acid is a component having a structure as shown in Chemical Formula 3 below, and has excellent UV blocking efficacy in the wavelength range of 320 to 400 nm. The above terephthalilylidendicampersulfonic acid is stable over time within the UV-blocking cosmetic composition of the present invention, so even if the UV-blocking cosmetic composition of the present invention is impregnated into a sponge or cushion, the potency of terephthalilylidendicampersulfonic acid can be maintained over time similar to that immediately after manufacturing.

[0043]

[0044] In one embodiment, terephthalilylidendicampersulfonic acid may be included in an amount of 0.5 to 6.5 weight% based on the total weight of the cosmetic composition for sunscreen, specifically 0.7 to 6 weight%, and more specifically 1 to 5.5 weight%. When terephthalilylidendicampersulfonic acid is included in the above amounts, the formulation may be stable over time and exhibit excellent sunscreen efficacy. However, it is not limited thereto.

[0045] In one embodiment, terephthalilylidendicampersulfonic acid may be applied to the aqueous phase of the cosmetic composition for UV protection according to the present invention. The terephthalilylidendicampersulfonic acid is a water-soluble UV blocking agent and, when applied to the aqueous phase, can exhibit excellent UV blocking efficacy.

[0046] In one embodiment, the emulsion formulation of the cosmetic composition for UV protection according to the present invention can exhibit significantly superior UV protection efficacy by including both methylenebis-benzotriazolyltetramethylbutylphenol and terephthalilylidendicampersulfonic acid in the aqueous phase.

[0048] The inorganic sunscreen of the present invention may have excellent blocking efficacy against a wide range of ultraviolet rays in the wavelength range of 250 nm to 400 nm.

[0049] In one embodiment, the inorganic sunscreen may include at least one of titanium dioxide and zinc oxide.

[0050] In one embodiment, the inorganic sunscreen may be included in an amount of 0.1 to 40 weight% based on the total weight of the sunscreen cosmetic composition, specifically 0.5 to 35 weight%, and more specifically 1 to 30 weight%.

[0051] In one embodiment, at least one of polysilicon-15 and an inorganic UV blocker may be applied to the oil phase, and at least one of methylenebis-benzotriazolyltetramethylbutylphenol, terephthalilyliden dicampersulfonic acid, and an inorganic UV blocker may be applied to the aqueous phase.

[0053] In one embodiment, the aqueous thickener may include an acrylate-based thickener. The inventors have confirmed that when an acrylate-based thickener is included, the stability of the emulsion formulation is improved and the potency of the sunscreen is also improved.

[0054] In one embodiment, the acrylate-based thickener may include at least one of polyacrylate crosspolymer-6, carbomer, and ammonium acryloyldimethyltaurate / VP copolymer, and specifically may include polyacrylate crosspolymer-6.

[0055] In one embodiment, the acrylate-based thickener may be included in an amount of 0.001 to 2 weight% based on the total weight of the cosmetic composition for sunscreen, specifically 0.005 to 1.5 weight%, and more specifically 0.01 to 1 weight%. When the acrylate-based thickener is included in the above amount, the time-dependent stability of various organic sunscreens can be appropriately improved. However, it is not limited thereto.

[0057] In one embodiment, the aqueous thickener may further include poloxamer. It was confirmed that the combination of the acrylate-based thickener and poloxamer can improve the formulation stability of the UV-blocking cosmetic composition and significantly improve the feel and stickiness.

[0058] In one embodiment, the poloxamer is poloxamer 105, poloxamer 124, poloxamer 181, poloxamer 182, poloxamer 184, poloxamer 185, poloxamer 188, poloxamer 333, poloxamer 403, poloxamer 407, poloxamer 331, poloxamer 338, poloxamer 235, poloxamer 234, poloxamer 217, poloxamer 401, poloxamer 215, poloxamer 101, poloxamer 123, poloxamer 237, poloxamer 238, poloxamer 334, poloxamer 335, poloxamer 108, poloxamer 122, poloxamer 183, poloxamer 212, poloxamer 231, poloxamer 282, It may include one or more selected from the group consisting of poloxamer 284, poloxamer 288, and poloxamer 402, and specifically may include poloxamer 188.

[0059] In one embodiment, poloxamer may be included in an amount of 0.01 to 5 weight% based on the total weight of the cosmetic composition for sunscreen, specifically 0.05 to 3 weight%, and more specifically 0.1 to 2 weight%. When poloxamer is included in the above amounts, the time-dependent stability of various organic sunscreens can be appropriately improved. However, it is not limited thereto.

[0061] In one embodiment, the UV-blocking cosmetic composition of the present invention may further include an oily thickener. By applying the oily thickener, formulation stability can be further improved. In a specific embodiment, the oily thickener may be included without limitation as long as it corresponds to an ingredient that can be conventionally used in cosmetic compositions. Examples of the above-mentioned oily thickeners may include one or more selected from the group consisting of dextrin behenate, dextrin laurate, dextrin palmitate, dextrin myristate, dextrin palmitate / ethylhexanoate, dextrin palmitate / hexyl decanoate, dextrin palmitate / stearate, stearoyl inulin, sucrose laurate, microcrystalline cellulose, polyamide-3, polyamide-8, HDI / trimethylolhexyl lactone crosspolymer, VP / eicosine copolymer, glyceryl tribehenate / isostearate / eicosandioate, and glyceryl ethylhexanoate / stearate / adipate, and specifically may include dextrin palmitate. However, it is not limited thereto.

[0062] In one embodiment, the oily thickener may be included in an amount of 0.01 to 10 weight% based on the total weight of the cosmetic composition for sunscreen, specifically 0.05 to 5 weight%, more specifically 0.1 to 3 weight%, and most specifically 0.1 to 1 weight%. When the oily thickener is included in the above amount, the time-dependent stability of various organic sunscreens can be appropriately improved. However, it is not limited thereto.

[0063] In one embodiment, the cosmetic composition for UV protection of the present invention may further include an emollient. The emollient acts as a solvent in the oil phase, maintains skin moisture, and can provide a continuous moisturizing sensation; silicone-based oils, hydrocarbon-based oils, ester-based oils, etc., may be used. However, it is not limited thereto, and any oil generally used in the art may be appropriately selected without limitation. In a specific embodiment, the emollient comprises at least one ester-based oil selected from C12-15 alkyl benzoate, dibutyl adipate, butylene glycol dicaprylate / dicaprate, ethylhexyl stearate, and propyl heptyl caprylate; and at least one silicone-based oil selected from disiloxane, caprylyl methicone, and methyl trimethicone. and at least one hydrocarbon oil among isododecane, hydrogenated poly(C6-14 olefin) and C15-19 alkane may be included, and specifically at least one of butylene glycol dicaprylate / dicaprate and caprylyl methicone may be included.

[0064] In one embodiment, the cosmetic composition for sunscreen according to the present invention may further include an emulsifier. The emulsifier can perform the role of stably emulsifying the oil phase component and the water phase component within the formulation. The emulsifier may include all emulsifier components that are generally used in the art, and specifically, at least one of water-in-oil emulsifiers and silicone-in-water emulsifiers may be included. In a specific embodiment, the emulsifier may include at least one of PEG-10 dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, cetyl PEG / PPG-10 / 1 dimethicone*pentaerythrityl tetra-di-t-butylhydroxyhydrocinnamate, diisostearoyl polyglyceryl-3 dimer dilinoleate, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone* tocopherol, sorbitan sesquioleate, and polyglyceryl-2 dipolyhydroxystearate, and specifically may include PEG-10 dimethicone.

[0065] In one embodiment, the cosmetic composition for sunscreen according to the present invention may further include an emulsifying agent. The emulsifying agent may contribute to the stabilization of the emulsion formulation formed by the oil phase component and the water phase component within the formulation. The emulsifier may include all emulsifier components that are generally used in the art, and in a specific embodiment, the emulsifying agent may include at least one of polyglyceryl-3 polydimethylsiloxyethyl dimethicone and polyglyceryl-6 polyricinoleate.

[0066] In one embodiment, the sunscreen cosmetic composition of the present invention may further include an inorganic thickener. The inorganic thickener may be included in the oil phase to control the viscosity of the oil phase, thereby improving the long-term stability and usability of the formulation. The inorganic thickener may be included without limitation as long as it is an ingredient that can be conventionally used in cosmetic compositions. In a specific embodiment, the inorganic thickener may include one or more selected from the group consisting of disteadiamonium hectorite, hectorite, quaternium-18 hectorite, stearalkonium hectorite, dihydrogenated tallow benzylmonium hectorite, bentonite, quaternium-90 bentonite, quaternium-18 bentonite, and stearalkonium bentonite, and specifically, disteadiamonium hectorite may be included.

[0068] In one embodiment, the cosmetic composition for UV protection of the present invention may further include a moisturizer, a preservative, or a functional ingredient.

[0069] The above moisturizer provides moisture to the skin or maintains moisture in the skin and provides a continuous moisturizing sensation. It is preferably a water-soluble ingredient, and for example, at least one of glycerin, butylene glycol, propylene glycol, dipropylene glycol, methylpropanediol, pentylene glycol, glycereth-26, propanediol, sorbitol, and diglycerin may be used, but is not limited thereto.

[0070] The above preservative is used to enhance the effect of preservation, and for example, at least one of ethylhexylglycerin, 1,2-hexanediol, caprylyl glycol, phenoxyethanol, and glyceryl caprylate may be used, but is not limited thereto, and any preservative generally used in the industry may be appropriately selected without limitation.

[0071] The above functional ingredients may be added by mixing various ingredients according to the purpose of the cosmetic composition, and include, for example, all of the following: wrinkle improvement agents, whitening functional ingredients, pigmentation functional ingredients, skin soothing functional ingredients, and sebum or pore management functional ingredients.

[0072] In addition to this, the UV-blocking cosmetic composition of the present invention may further include ingredients included in general cosmetic compositions. It may include, for example, dispersants, polyols, feel modifiers, skin conditioning agents, ion chelating agents, disinfectants, pH adjusters, antioxidants, alcohols, plant extracts, fragrances, feel modifiers, etc.

[0073] The amounts of the aforementioned ingredients are not particularly limited and can be easily selected by a person skilled in the art within a range that does not impair the purpose and effects of the present invention.

[0075] In one embodiment, the cosmetic composition for UV protection of the present invention may be prepared as an emulsion formulation, specifically as an emulsion formulation in which the aqueous phase is the dispersed phase. As the emulsion formulation in which the aqueous phase is the dispersed phase, there may be a water-in-oil (W / O) formulation or a water-in-silicon (W / S) formulation.

[0076] In addition, it can be manufactured not only in the above-mentioned water-in-oil or silicone-in-water formulations but also in multiple emulsion formulations such as oil-in-water-in-oil (O / W / O).

[0077] In addition, the cosmetic composition for UV protection of the present invention may be provided in formulations conventionally manufactured in the art. For example, it may be formulated into a solubilized formulation, etc. However, it is not limited thereto, and the composition may also be provided in various formulations such as a solution, suspension, emulsion, solid, oil, powder, paste, foam aerosol, mist, etc.

[0078] In one embodiment, the cosmetic composition for UV protection of the present invention may be provided in a gel formulation, a lotion formulation, a cream formulation, a low-viscosity liquid formulation, or a fluid formulation, specifically in a lotion formulation, and more specifically, said formulations may correspond to an emulsion formulation. However, it is not limited thereto.

[0079] In one embodiment, the UV-blocking cosmetic composition of the present invention can be used as a cosmetic composition for a cosmetic cushion.

[0081] According to another embodiment of the present invention, a cosmetic cushion impregnated with the UV-blocking cosmetic composition of the present invention is provided. The cosmetic composition exhibits excellent stability of the UV-blocking agent over time, thereby solving the problem of a significant decrease in the potency of the UV-blocking agent component when the UV-blocking cosmetic composition is impregnated into a cushion or sponge.

[0082] In one embodiment, the cosmetic cushion may be made of various materials known in the art. In a specific embodiment, the cosmetic cushion may be a sponge made of polyurethane material. However, it is not limited thereto.

[0083] In one embodiment, the cosmetic cushion can be manufactured as a sun cushion product with excellent UV blocking efficacy.

[0084] In one embodiment, the sunscreen cosmetic composition of the present invention may be manufactured into various cosmetics with excellent sunscreen efficacy in addition to the sun cushion product. Examples of such cosmetics may include sun care products such as sun cream, sun stick, sun milk, sun spray, sun lotion, etc., and may be manufactured into functional cosmetics such as nourishing cream, essence, ampoule, moisturizing cream, eye cream, etc., or basic cosmetics such as toner, lotion, etc. However, it is not limited thereto.

[0086] In the following, examples and experimental examples are presented to further explain the present invention in more detail, but the present invention is not limited thereto.

[0088] Experimental Example 1. Confirmation of Time-dependent Stability of Polysilicon-15 - Titer Analysis

[0089] To identify organic sunscreens suitable for sponges or cushions, organic sunscreens were impregnated into plastic vials or polyurethane sponges, and the time-dependent stability of the organic sunscreens was confirmed through potency analysis. Specifically, polysilicon-15, ethylhexyl salicylate, ethylhexyl triazone, diethylaminohydroxybenzoylhexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine were each used as organic sunscreens, and each was dissolved in a butylene glycol dicaprylate / dicaprate solvent to a concentration of 3 wt% and impregnated into a plastic vial or polyurethane sponge. The potency of the plastic vial and polyurethane sponge in which the above organic sunscreen was dissolved was measured, and the potency of the stored sample was measured again after being stored for one month under harsh conditions (40℃) or room temperature conditions (25℃) to confirm the time-dependent stability of the organic sunscreen.

[0090] The results of the titer analysis by the above method are shown in Table 1 below.

[0091]

[0093] According to Table 1 above, the remaining organic sunscreens, excluding polysilicon-15, showed a tendency for their potency to decrease over time under both harsh and room temperature conditions when impregnated in a sponge compared to when stored in a vial, and were confirmed to be sunscreen ingredients unsuitable for application in sponges. However, polysilicon-15 was confirmed to be a sunscreen ingredient suitable for impregnation in sponges, as its potency was maintained at a similar level to the initial value in both vials and polyurethane sponges.

[0095] Experimental Example 2. Analysis of Potency by Sunscreen Ingredient

[0096] (1) Preparation of Example 1

[0097] Example 1 of the water-in-oil type was prepared as shown in Table 2 below. Specifically, as organic sunscreens, polysilicon-15, a self-soluble organic sunscreen confirmed to have excellent time-dependent stability even when impregnated into a sponge through Experimental Example 1, terephthalilyliden dicampersulfonic acid*water (TDSA content 33%), a water-soluble organic sunscreen, and methylenebis-benzotriazolyltetramethylbutylphenol*decylglucoside*glycerin*xanthan gum*water (MBBT content 50%), a water-dispersible organic sunscreen were used; as inorganic sunscreens, titanium dioxide*C12-15 alkyl benzoate*polyhydroxystearic acid*stearic acid*aluminum hydroxide (titanium dioxide content 44%) and zinc oxide*dibutyl adipate*polyhydroxystearic acid*stearic acid (zinc oxide content 72%) were used, and as an aqueous thickener Polyacrylate crosspolymer-6 and poloxamer 188 were used, and dextrin palmitate was used as an oily thickener. The units of the contents in Table 2 are weight%.

[0098]

[0100] The specific manufacturing method is as follows.

[0101] The oil phase was heated to 70 to 80°C to dissolve and disperse it, and the aqueous phase was heated to 70 to 80°C to sufficiently disperse it. Then, the uniformly dispersed oil phase and aqueous phase were cooled to 40 to 70°C, the aqueous phase was slowly added to the oil phase to emulsify it, and the mixture was cooled to room temperature to complete the UV-blocking cosmetic composition of Example 1.

[0103] (2) Analysis of potency by sunscreen

[0104] The UV-blocking cosmetic composition of Example 1 was impregnated into a sponge (finished product) and its potency was measured. The time-dependent stability of the UV-blocking agent was evaluated by storing the sample for 1 month and 3 months under the same temperature conditions as in Experimental Example 1 and measuring the potency after each period. In addition, to confirm whether the UV-blocking agent had stabilized within the composition of Example 1, the sample was placed in a vial (semi-finished product) without being impregnated into a sponge and stored for 1 month and 3 months under the same temperature conditions as in Experimental Example 1, and the potency was measured after each period. The results of the potency measurements based on the above evaluation are shown in Table 3 below. The indicated amounts of the UV-blocking agents excluding polysilicon were indicated by reflecting the ratio of the UV-blocking agents within the raw materials used.

[0105]

[0107] According to Table 3 above, it was confirmed that both the organic and inorganic sunscreens included in Example 1 had potencies similar to those immediately after being impregnated into the sponge, indicating excellent stability over time.

[0108] Accordingly, it was confirmed that the organic and inorganic sunscreens of the present invention are stabilized within a cosmetic composition and, even when impregnated into a cosmetic cushion, the potency of the sunscreen is stably maintained, thereby exhibiting excellent sunscreen efficacy.

[0110] Experimental Example 3. Comparative experiment according to the content of sunscreen agent

[0111] (1) Preparation of Examples and Comparative Examples

[0112] Examples and comparative examples were prepared based on Example 1 as shown in Tables 4 and 5 below, with only the content of terephthalilyliden dicamphorsulfonic acid*water or methylenebis-benzotriazolyltetramethylbutylphenol*decylglucoside*glycerin*xanthan gum*water applied to the aqueous phase of the organic sunscreen being varied, while the remaining components and content were kept the same.

[0113]

[0115]

[0117] (2) Long-term stability and sensory evaluation

[0118] The long-term stability of the above examples and comparative examples was evaluated, and the degree of stickiness and the degree of whitening phenomenon upon application were evaluated.

[0119] For the long-term stability evaluation, the formulation was evaluated to see if it remained as stable as it was immediately after manufacturing after being stored for one month at low temperature (5℃), room temperature (25℃), and high temperature (40℃). If the formulation was not stable under any of the temperature conditions, it was evaluated as unsatisfactory.

[0120] In the case of the degree of stickiness, the degree of stickiness and whether smooth application is possible were evaluated using a 5-point scale in which a lower score is assigned as the stickiness decreases while applying the example or comparative example to the skin. In the case of the whitening phenomenon, after completing the application of the example or comparative example to the skin, whether excessive whitening occurs was observed visually, and the evaluation was performed using a 5-point scale in which a higher score is assigned as the whitening phenomenon improves.

[0121] The evaluation results based on the above method are shown in Tables 6 and 7 below.

[0123] (3) Measurement of UV protection efficacy

[0124] In order to confirm the synergistic UV blocking efficacy of the above examples and comparative examples in vitro PA and SPF measurements were performed. Specifically, for the above examples and comparative examples, 2.0 mg / cm² was applied to a PMMA plate. 2 Samples were prepared by taking a small amount, applying it evenly for 30 seconds, and drying it in a dark room for 15 minutes. Labsphere UV 2000S In Vitro UVAPF and using an SPF Analyzer in vitro The SPF value was measured. The above UVAPF and in vitroThe SPF value is the average of three experimental values, and the measurement results are shown in Tables 6 and 7 below.

[0125]

[0127]

[0129] According to Tables 6 and 7 above, it was confirmed that when MBBT and TDSA are included in appropriate amounts, a long-term stable formulation is formed, and it is convenient to use due to low stickiness and easy to apply in large quantities due to minimal white cast after application. In addition, it was confirmed that the organic and inorganic sunscreen ingredients are well stabilized within the formulation, resulting in excellent UVAPF and SPF values, and that the blocking efficacy against ultraviolet rays over a wide wavelength range is significantly superior.

[0130] Conversely, it was confirmed that UV protection efficacy significantly decreases when either MBBT or TDSA is included in amounts lower than the optimal level, while excessive amounts lead to severe stickiness and poor formulation stability. In particular, high concentrations of MBBT result in severe white cast, making it unsuitable for use in cosmetic compositions.

[0131] Therefore, it was confirmed that appropriately controlling the content of MBBT and TDSA applied to the aqueous phase (dispersed phase) is an important factor in realizing a cosmetic composition with excellent UV blocking efficacy over a wide wavelength range, as well as superior formulation stability and usability.

[0133] Experimental Example 4. Comparative experiment according to the type of aqueous thickening agent

[0134] (1) Preparation of Examples and Comparative Examples

[0135] As shown in Table 8 below, based on Example 1, examples and comparative examples were prepared by changing only the components and / or content of the aqueous thickener while keeping the remaining components and content the same.

[0136]

[0138] (2) Long-term stability and sensory evaluation

[0139] Long-term stability and the degree of stickiness were evaluated for the examples and comparative examples prepared as shown in Table 8 above, using the same method as in Experimental Example 3. In addition, whether the cosmetic composition achieved an appropriate user sensation depending on the change of the thickener was evaluated during the application process.

[0140] The evaluation results based on the above method are shown in Table 9 below.

[0141]

[0143] According to Table 9 above, in the case of Examples 10 to 12, which include an acrylate-based thickener as a water-based thickener, it was confirmed that the formulation stability is excellent, the degree of stickiness is decent, and the application is easy, resulting in excellent usability. In particular, Example 1, which includes both an acrylate-based thickener and poloxamer, was confirmed to have significantly improved stickiness compared to Examples 10 to 12 and exhibited the best usability. On the other hand, in Comparative Examples 7 and 8, which did not use an acrylate-based thickener, Comparative Example 7, which used a cationic thickener, showed phase separation after high-temperature storage and clumping of the formulation during the application process, while Comparative Example 8, which used a polysaccharide-based thickener, showed phase separation after high-temperature storage and sliding of the formulation during the application process, so it was evaluated as having poor usability.

[0144] Therefore, it was confirmed that including an acrylate-based thickener as a water-based thickener is an important component for realizing a UV-blocking cosmetic composition with excellent usability, and that stickiness can be significantly improved when poloxamer is included.

[0146] 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 A cosmetic composition for sunscreen in an emulsion formulation, comprising an organic sunscreen agent, an inorganic sunscreen agent, and an aqueous thickening agent, wherein the organic sunscreen agent comprises at least one of polysilicon-15, methylene bis-benzotriazolyl tetramethylbutylphenol, and terephthalylidene dicamphor sulfonic acid. Claim 2 A cosmetic composition for UV protection according to claim 1, wherein the methylenebis-benzotriazolyltetramethylbutylphenol is included in an amount of 0.2 to 3 weight% based on the total weight of the cosmetic composition for UV protection. Claim 3 A sunscreen cosmetic composition according to claim 1, wherein the terephthalilylidendicampersulfonic acid is included in an amount of 0.5 to 6.5 weight% based on the total weight of the sunscreen cosmetic composition. Claim 4 A UV-blocking cosmetic composition according to claim 1, wherein the polysilicon-15 is included in an amount of 0.01 to 10 weight% based on the total weight of the UV-blocking cosmetic composition. Claim 5 A cosmetic composition for UV protection according to claim 1, wherein the aqueous thickener comprises an acrylate-based thickener. Claim 6 A sunscreen cosmetic composition according to claim 5, wherein the acrylate-based thickening agent is included in an amount of 0.001 to 2 weight% based on the total weight of the sunscreen cosmetic composition. Claim 7 In claim 5, the above acrylate-based thickening agent comprises polyacrylate crosspolymer-6, a cosmetic composition for UV protection. Claim 8 A cosmetic composition for UV protection according to claim 5, wherein the aqueous thickener further comprises poloxamer. Claim 9 A sunscreen cosmetic composition according to claim 8, wherein the poloxamer is included in an amount of 0.01 to 5 weight% based on the total weight of the sunscreen cosmetic composition. Claim 10 In claim 1, the cosmetic composition for UV protection further comprises an oily thickening agent. Claim 11 A cosmetic composition for sunscreen according to claim 1, wherein the inorganic sunscreen comprises at least one of titanium dioxide and zinc oxide. Claim 12 In claim 1, the cosmetic composition for UV protection is a water-in-oil (W / O) formulation or a water-in-silicone (W / S) formulation. Claim 13 A cosmetic composition for blocking ultraviolet rays according to claim 1, characterized in that the above-described cosmetic composition is for impregnation into a cosmetic cushion. Claim 14 A cosmetic composition for sunscreen according to claim 1, characterized in that the cosmetic composition for sunscreen is at least one emulsion formulation among cream, lotion, fluid, and gel formulations. Claim 15 A cosmetic cushion impregnated with a UV-blocking cosmetic composition of any one of claims 1 to 14.

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