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

Abstract

The objective is to provide a cosmetic composition for UV protection that, by optimally blending organic UV-blocking agents, inorganic UV-blocking agents, and aqueous thickeners, maintains the potency of the UV-blocking agents over time even when impregnated into a cushion, exhibiting excellent UV-blocking effects over a long period of time, and stabilizes various UV-blocking agents within the formulation, resulting in a broad-spectrum UV-blocking effect. [Solution] An emulsified cosmetic composition for blocking ultraviolet rays, comprising an organic ultraviolet blocking agent, an inorganic ultraviolet blocking agent, and an aqueous thickener, wherein the organic ultraviolet blocking agent comprises at least one of the following: polysilicone-15, methylene bis-benzotriazolyl tetramethylbutylphenol, and terephthalylidene dicamphor sulfonic acid.

Description

[Technical Field]

[0001] The present invention relates to a cosmetic composition for ultraviolet blocking that is excellent in ultraviolet blocking effect over a wide range of ultraviolet wavelengths. More specifically, the present invention relates to a cosmetic composition for ultraviolet blocking, in which, by optimally blending an organic ultraviolet blocking agent, an inorganic ultraviolet blocking agent and an aqueous thickener, the titer of the ultraviolet blocking agent is maintained over time even when the composition is impregnated into a cushion, an excellent ultraviolet blocking effect can be exhibited over a long period of time, various ultraviolet blocking agents are stabilized in the preparation, and the composition is excellent in blocking effect against a wide range of ultraviolet wavelengths. [Background Art]

[0002] Ultraviolet rays that reach the Earth's surface from the sun have short wavelengths and high energy, so even a short period of exposure may cause phenomena such as skin aging and wrinkles. Among ultraviolet rays, ultraviolet A (UVA; ultraviolet rays in the wavelength range of 320 nm to 400 nm), which is classified as long-wavelength ultraviolet rays, has a longer wavelength than other ultraviolet regions and thus can reach the dermal layer of the skin. It is known that UVA tans the skin and causes long-term skin damage associated with aging. In addition, ultraviolet B (UVB; ultraviolet rays in the wavelength range of 280 nm to 320 nm) is a light ray that directly adversely affects the skin, tans the skin and induces skin cancer. Furthermore, ultraviolet C (UVC; ultraviolet rays with a wavelength of less than 280 nm), which is the ultraviolet in the shortest wavelength region, is the ultraviolet with the highest energy. Since UVC is completely absorbed by the ozone layer, the amount that reaches the ground is very small, but it is known that when the human body is exposed to this UVC, it induces burns, skin cancer and cataracts.

[0003] Therefore, countless types of ultraviolet blocking products for protecting the skin from these ultraviolet rays have been put on the market.

[0004] UV-blocking products may lose their effectiveness when exposed to sunlight outdoors or when applied to the skin for extended periods. Therefore, reapplying UV-blocking products to the skin during daily activities is effective in protecting the skin from UV rays. However, liquid UV-blocking products are very inconvenient to apply outdoors, and for women, the application process can cause makeup to smudge, requiring touch-ups. To solve this problem, there is a need for products such as sun cushions that can provide effective UV protection.

[0005] However, when UV-blocking agents are applied to sun cushions, the UV-blocking agent is absorbed into the cushion over time, which can reduce the UV-blocking effect even if the product is stored for a long period of time.

[0006] The inventors of this invention have diligently continued their research to solve the above-mentioned problems, and as a result have found that it is possible to stabilize oily organic UV blockers, aqueous organic UV blockers, and inorganic UV blockers in an emulsified formulation, and that the effectiveness of the UV blockers does not decrease even when impregnated into a cushion such as a sponge, thereby realizing a cosmetic composition that can exhibit a long-term blocking effect against ultraviolet rays across a wide wavelength range. Based on this finding, the inventors have completed the present invention. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Korean Patent Publication No. 10-2022-0054447 [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention aims to provide a cosmetic composition for UV protection that significantly improves the time-dependent stability of various UV-blocking agents and exhibits excellent UV-blocking effects over a wide range of ultraviolet rays.

[0009] The technical problems of the present invention are not limited in any way to those described above, and other unmentioned technical problems should be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0010] According to embodiments of the present invention, a cosmetic composition for UV protection is provided, comprising an organic UV blocking agent, an inorganic UV blocking agent, and an aqueous thickener, wherein the organic UV blocking agent comprises at least one of the following: polysilicone-15, methylene bis-benzotriazolyl tetramethylbutylphenol, and terephthalylidene dicamphor sulfonic acid.

[0011] Furthermore, the methylenebis-benzotriazolyltetramethylbutylphenol may be present in an amount of 0.2% to 3% by weight relative to the total weight of the UV-blocking cosmetic composition.

[0012] Furthermore, the terephthalylidene dicamphor sulfonic acid may be present in an amount of 0.5% to 6.5% by weight relative to the total weight of the UV-blocking cosmetic composition.

[0013] Furthermore, the polysilicone-15 may be present in an amount of 0.01% to 10% by weight relative to the total weight of the UV-blocking cosmetic composition.

[0014] Furthermore, the aqueous thickener may also include an acrylate-based thickener.

[0015] Furthermore, the acrylate-based thickener may also contain polyacrylate crosspolymer-6.

[0016] Furthermore, the acrylate-based thickener may be present in an amount of 0.001% to 2% by weight relative to the total weight of the UV-blocking cosmetic composition.

[0017] Furthermore, the aqueous thickener may further comprise a poloxamer.

[0018] Furthermore, the poloxamer may be contained in an amount of 0.01% to 5% by weight based on the total weight of the ultraviolet-blocking cosmetic composition.

[0019] Furthermore, the inorganic ultraviolet blocking agent may comprise at least one selected from the group consisting of titanium dioxide and zinc oxide.

[0020] Furthermore, the ultraviolet-blocking cosmetic composition may be a water-in-oil (W / O) formulation or a water-in-silicone (W / S) formulation.

[0021] Furthermore, the ultraviolet-blocking cosmetic composition may be for impregnation into a cosmetic cushion.

[0022] Furthermore, the ultraviolet-blocking cosmetic composition may be an emulsified formulation in at least one dosage form selected from the group consisting of cream, lotion, fluid and gel.

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

[0024] The ultraviolet-blocking cosmetic composition of the present invention can exert an excellent blocking effect against a wide range of ultraviolet rays by stabilizing various organic ultraviolet blocking agents and inorganic ultraviolet blocking agents in the formulation.

[0025] In addition, the ultraviolet-blocking cosmetic composition is excellent in stability over time, maintains the titer of the ultraviolet blocking agent even when impregnated into a cushion or the like, and can exert an excellent ultraviolet blocking effect over a long period of time, so that it can be suitably applied to products such as sun cushions.

[0026] Furthermore, due to the aforementioned stability over time, it can be suitably provided as at least one or more emulsified formulations among the dosage forms of cream, lotion, fluid, and gel.

[0027] Furthermore, even when the cosmetic composition contains a high content of inorganic UV-blocking agents, the white cast phenomenon can be significantly improved, and despite the application of high-content UV-blocking agents, it is less sticky and easy to use.

[0028] In addition to these, the cosmetic composition contains UV-blocking agent components in both the continuous phase and the dispersed phase of the emulsified formulation, thereby reducing variations in UV-blocking effect caused by the particle size of the emulsified particles and enabling it to exhibit a uniform UV-blocking effect. [Modes for carrying out the invention]

[0029] Unless otherwise specifically noted or clearly inconsistent with the context, all terms used in this specification, including technical and scientific terms, have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. Generally, the nomenclature used in this specification is well-known and commonly used in the art. Furthermore, in describing the present invention, detailed descriptions of known technologies or functions related to the present invention will be omitted if it is deemed that such descriptions would hinder the understanding of embodiments of the present invention. While embodiments of the present invention will be described below, the technical concept of the present invention is not limited or restricted in any way and can be modified and implemented in various ways by those skilled in the art.

[0030] Throughout this specification, when a part is described as "containing" or "encompassing" a component, this means, unless otherwise specified, that it may include other components rather than excluding them. Furthermore, in this specification, the phrases "and / or" may include a combination of multiple related descriptions or any one of multiple related descriptions.

[0031] According to embodiments of the present invention, a cosmetic composition for UV protection is provided, comprising an organic UV-blocking agent, an inorganic UV-blocking agent, and an aqueous thickener, wherein the organic UV-blocking agent comprises at least one of polysilicone-15, methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), and terephthalylidene dicamphor sulfonic acid (TDSA), and comprising an aqueous phase and an oil phase. The inventors have confirmed that by including a specific aqueous thickener, the organic UV-blocking agent and the inorganic UV-blocking agent can be stabilized over time in the formulation, and the potency of the UV-blocking agent can be maintained. In particular, when a composition containing a UV-blocking agent is impregnated into a sponge or cushion, the potency of the organic UV-blocking agent tends to decrease significantly, but the cosmetic composition for UV protection of the present invention makes it possible to maintain the potency of the UV-blocking agent over time even when impregnated into a sponge or cushion.

[0032] Polysilicone-15 is a component having the structure shown in Chemical Formula 1 below, and exhibits excellent ultraviolet blocking effect in the wavelength range of 270 nm to 330 nm. The inventors' studies have confirmed that polysilicone-15 is not easily adsorbed onto sponges or cushions. Therefore, even when an ultraviolet-blocking cosmetic composition containing polysilicone-15 is impregnated into a sponge or cushion, the potency of polysilicone-15 can be maintained over time at the same level as immediately after manufacture.

[0033] [ka]

[0034] In one embodiment, polysilicone-15 may be present in an amount of 0.01% to 10% by weight relative to the total weight of the UV-blocking cosmetic composition, more specifically, 0.05% to 5% by weight, and more specifically, 0.1% to 2% by weight. When polysilicone-15 is included in the above amounts, the potency of the polysilicone-15 is maintained over time, and the UV-blocking effect is excellent. However, the present invention is not limited thereto.

[0035] In one embodiment, polysilicone-15 is applicable to the oil phase of the UV-blocking cosmetic composition of the present invention. The polysilicone-15 is an oil-soluble UV-blocking agent component and can be applied to the oil phase to exhibit an excellent UV-blocking effect.

[0036] As a result of studies conducted by the present inventors, it was confirmed that the time-dependent stability of methylenebis-benzotriazolyltetramethylbutylphenol and terephthalylidene dicamphor sulfonic acid can be improved by optimally incorporating an aqueous thickener.

[0037] Methylenebis-benzotriazolyltetramethylbutylphenol is a component having the structure shown in Chemical Formula 2 below, and exhibits excellent ultraviolet blocking effect in the wavelength range of 300 nm to 360 nm. The methylenebis-benzotriazolyltetramethylbutylphenol is stable over time in the ultraviolet blocking cosmetic composition of the present invention, and even when the ultraviolet blocking cosmetic composition of the present invention is impregnated into a sponge or cushion, the potency of methylenebis-benzotriazolyltetramethylbutylphenol can be maintained over time at the same level as immediately after manufacture.

[0038] [ka]

[0039] In one embodiment, methylenebis-benzotriazolyltetramethylbutylphenol may be present in an amount of 0.2% to 3% by weight of the total weight of the UV-blocking cosmetic composition, specifically, 0.3% to 3% by weight. When methylenebis-benzotriazolyltetramethylbutylphenol is present in the above amount, the formulation is stable over time and can exhibit excellent UV-blocking effects. However, the present invention is not limited thereto.

[0040] In one embodiment, methylenebis-benzotriazolyltetramethylbutylphenol is applicable to the aqueous phase of the UV-blocking cosmetic composition of the present invention. The methylenebis-benzotriazolyltetramethylbutylphenol is a water-dispersible UV-blocking agent component and can exhibit an excellent UV-blocking effect when applied to the aqueous phase.

[0041] Terephthalylidene dicamphor sulfonic acid is a component having the structure shown in Chemical Formula 3 below, and exhibits excellent ultraviolet blocking effect in the wavelength range of 320 nm to 400 nm. The terephthalylidene dicamphor sulfonic acid is stable over time in the ultraviolet blocking cosmetic composition of the present invention, and even when the ultraviolet blocking cosmetic composition of the present invention is impregnated into a sponge or cushion, the potency of terephthalylidene dicamphor sulfonic acid can be maintained over time at the same level as immediately after manufacture.

[0042] [ka]

[0043] In one embodiment, terephthalylidene dicamphor sulfonic acid may be present in an amount of 0.5% to 6.5% by weight of the total weight of the UV-blocking cosmetic composition, more specifically, 0.7% to 6% by weight, and more specifically, 1% to 5.5% by weight. When terephthalylidene dicamphor sulfonic acid is present in the above amounts, the formulation is stable over time and can exhibit excellent UV-blocking effects. However, the present invention is not limited thereto.

[0044] In one embodiment, terephthalylidene dicamphor sulfonic acid is applicable to the aqueous phase of the UV-blocking cosmetic composition of the present invention. The terephthalylidene dicamphor sulfonic acid is a water-soluble UV-blocking agent component and can exhibit an excellent UV-blocking effect when applied to the aqueous phase.

[0045] In one embodiment, the UV-blocking cosmetic composition of the emulsified formulation of the present invention can exhibit a remarkably excellent UV-blocking effect by containing both methylenebis-benzotriazolyltetramethylbutylphenol and terephthalylidene dicamphor sulfonic acid in the aqueous phase.

[0046] The inorganic ultraviolet blocking agent of the present invention exhibits excellent blocking effects against ultraviolet light over a wide wavelength range of 250 nm to 400 nm.

[0047] In one embodiment, the inorganic ultraviolet blocking agent may include at least one of titanium dioxide and zinc oxide.

[0048] In one embodiment, the inorganic ultraviolet blocking agent may be present in an amount of 0.1% to 40% by weight relative to the total weight of the ultraviolet blocking cosmetic composition, more specifically, 0.5% to 35% by weight, and more specifically, 1% to 30% by weight.

[0049] In one embodiment, at least one of polysilicone-15 and an inorganic ultraviolet shielding agent can be applied to the oil phase, and at least one of methylenebis-benzotriazolyltetramethylbutylphenol, terephthalylidene dicamphor sulfonic acid, and an inorganic ultraviolet shielding agent can be applied to the aqueous phase.

[0050] In one embodiment, the aqueous thickener may include an acrylate-based thickener. Our studies have confirmed that when an acrylate-based thickener is included, the stability of the emulsified formulation improves, and the potency of the UV-blocking agent also improves.

[0051] In one embodiment, the acrylate-based thickener may comprise at least one of polyacrylate crosspolymer-6, carbomer, and ammonium acryloyldimethyltaurate / VP copolymer, and more specifically, it may comprise polyacrylate crosspolymer-6.

[0052] In one embodiment, the acrylate-based thickener may be present in an amount of 0.001% to 2% by weight relative to the total weight of the UV-blocking cosmetic composition, more specifically, 0.005% to 1.5% by weight, and more specifically, 0.01% to 1% by weight. When the acrylate-based thickener is included in the above amounts, the time-dependent stability of various organic UV-blocking agents can be appropriately improved. However, the present invention is not limited thereto.

[0053] In one embodiment, the aqueous thickener may further contain poloxamer. The inventors have confirmed that the combination of the acrylate-based thickener and poloxamer can improve the dosage form stability of the UV-blocking cosmetic composition and significantly improve the feel and stickiness.

[0054] In one embodiment, the poloxamers are 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 It may include one or more species selected from the group consisting of roxamer 101, poloxamer 123, poloxamer 237, poloxamer 238, poloxamer 334, poloxamer 335, poloxamer 108, poloxamer 122, poloxamer 183, poloxamer 212, poloxamer 231, poloxamer 282, poloxamer 284, poloxamer 288, and poloxamer 402, and specifically may include poloxamer 188.

[0055] In one embodiment, poloxamer may be present in an amount of 0.01% to 5% by weight of the total weight of the UV-blocking cosmetic composition, more specifically, 0.05% to 3% by weight, and more specifically, 0.1% to 2% by weight. When poloxamer is included in the above amounts, the time-dependent stability of various organic UV-blocking agents can be appropriately improved. However, the present invention is not limited thereto.

[0056] In one embodiment, the UV-blocking cosmetic composition of the present invention may further contain an oily thickener. By applying the oily thickener, the formulation stability can be further improved. In one specific embodiment, the oily thickener may be included without particular limitations as long as it is an ingredient that can be used in cosmetic compositions. Examples of the oily thickener include one or more selected from the group consisting of dextrin behenate, dextrin laurate, dextrin palmitate, dextrin myristate, dextrin palmitate / ethylhexanoate, dextrin palmitate / hexyldecanoate, dextrin palmitate / stearate, stearoyl inulin, sucrose laurate, microcrystalline cellulose, polyamide-3, polyamide-8, HDI / trimethylol hexyllactone crosspolymer, VP / eicosene copolymer, glyceryl tribehenate / isostearate / eicosanediate, and glyceryl ethylhexanoate / stearate / adipate, and more specifically, dextrin palmitate. However, the present invention is not limited in any way thereto.

[0057] In one embodiment, the oily thickener may be present in an amount of 0.01% to 10% by weight relative to the total weight of the UV-blocking cosmetic composition, more specifically, 0.05% to 5% by weight, more specifically, 0.1% to 3% by weight, and most specifically, 0.1% to 1% by weight. When the oily thickener is included in the above amounts, the time-dependent stability of various organic UV-blocking agents can be appropriately improved. However, the present invention is not limited thereto.

[0058] In one embodiment, the UV-blocking cosmetic composition of the present invention may further contain an emollient. The emollient acts as a solvent in the oil phase, maintaining skin moisture and providing a sustained moisturizing sensation. Silicone oils, hydrocarbon oils, ester oils, etc., can be used. However, the present invention is not limited thereto, and any oil that is generally available in the industry can be suitably selected without any particular limitations. In one specific embodiment, as the emollient, C 12 ~C 15 At least one ester oil from among alkyl benzoate, dibutyl adipate, butylene glycol dicaprylate / dicaplate, ethylhexyl stearate, and propylheptyl caprylate, at least one silicone oil from among disiloxane, caprylyl methicone, and methyl trimethicone, and isododecane, hydrogenated poly(C6~C) 14 (Olefins) and C 15 ~C 19 It may contain at least one hydrocarbon oil from among the alkanes, specifically at least one of butylene glycol dicaprylate / dicapate and caprylyl methicone.

[0059] In one embodiment, the UV-blocking cosmetic composition of the present invention may further contain an emulsifier. The emulsifier can play a role in stably emulsifying the oil phase component and the aqueous phase component in the formulation. The emulsifier may contain any of the emulsifier components that are generally available in the industry, and specifically, it may contain at least one of a water-in-oil emulsifier and a water-in-silicone emulsifier. In one specific embodiment, the emulsifier may contain at least one of the following: PEG-10 dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, cetyl PEG / PPG-10 / 1 dimethicone / pentaerythrityltetra-di-t-butylhydroxyhydrocinnamate, diisostearoyl polyglyceryl-3 dimer dilinoleate, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone / tocopherol, sorbitan sesquioliate, and polyglyceryl-2 dipolyhydroxystearate, and more specifically, it may contain PEG-10 dimethicone.

[0060] In one embodiment, the UV-blocking cosmetic composition of the present invention may further contain an emulsifying agent. The emulsifying agent can contribute to stabilizing the emulsified formulation formed by the oil phase component and the aqueous phase component in the formulation. The emulsifying agent may contain any of the emulsifying agent components that are generally available in the industry, and in one specific embodiment, the emulsifying agent may contain at least one of polyglyceryl-3 polydimethylsiloxyethyl dimethicone and polyglyceryl-6 polyricinolate.

[0061] In one embodiment, the UV-blocking cosmetic composition of the present invention may further contain an inorganic thickener. The inorganic thickener can be included in the oil phase to adjust the viscosity of the oil phase and play a role in improving the long-term stability and feel of the formulation. The inorganic thickener may be included without particular limitations as long as it is an ingredient that can be normally used in cosmetic compositions. In one specific embodiment, the inorganic thickener may include one or more selected from the group consisting of disteardimonium hectorite, hectorite, quaternium-18 hectorite, stearalkonium hectorite, dihydrogenated tarobenzilmonium hectorite, bentonite, quaternium-90 bentonite, quaternium-18 bentonite, and stearalkonium bentonite, and more specifically, may include disteardimonium hectorite.

[0062] In one embodiment, the UV-blocking cosmetic composition of the present invention may further contain a humectant, a preservative, or a functional ingredient.

[0063] The aforementioned humectant provides moisture to the skin or retains moisture in the skin, providing a sustained moisturizing sensation, and is preferably a water-soluble component. For example, at least one of glycerin, butylene glycol, propylene glycol, dipropylene glycol, methylpropanediol, pentylene glycol, glycereth-26, propanediol, sorbitol, and diglycerin can be used, but the present invention is not limited thereto.

[0064] The aforementioned preservatives are used to improve shelf life, and for example, at least one of ethylhexylglycerin, 1,2-hexanediol, caprylyl glycol, phenoxyethanol, and glyceryl caprylate can be used. However, the present invention is not limited in any way, and any preservative that is generally available in the industry can be suitably selected without any particular restrictions.

[0065] The aforementioned functional ingredients can be added by mixing various components depending on the purpose of the cosmetic composition, and may include, for example, wrinkle-improving agents, whitening functional ingredients, pigmentation-improving functional ingredients, skin-soothing functional ingredients, and sebum or pore-management functional ingredients.

[0066] In addition to these, the UV-blocking cosmetic composition of the present invention may further contain components that are typically found in cosmetic compositions, such as dispersants, polyols, texture modifiers, skin conditioning agents, ion-sequestering agents, bactericides, pH adjusters, antioxidants, alcohols, plant extracts, fragrances, and the like.

[0067] The amounts of the above-mentioned components are not particularly limited and can be easily selected by those skilled in the art within a range that does not impair the purpose and effects of the present invention.

[0068] In one embodiment, the UV-blocking cosmetic composition of the present invention can be manufactured as an emulsified formulation, specifically, as an emulsified formulation in which the aqueous phase is a dispersed phase. Examples of emulsified formulations in which the aqueous phase is a dispersed phase include water-in-oil (W / O) formulations and water-in-silicone (W / S) formulations.

[0069] Furthermore, the product is not limited to the aforementioned water-in-oil (W / O) or water-in-silicone (W / S) formulations, but can also be manufactured as a multiple emulsion formulation such as oil-in-water (O / W / O).

[0070] In addition to the above, the UV-blocking cosmetic composition of the present invention can also be provided in the form of formulations commonly manufactured in the industry. For example, it can be formulated as a solubilized formulation. However, the present invention is not limited thereto. Furthermore, the composition can also be provided in various dosage forms such as solutions, suspensions, emulsions, solids, oils, powders, pastes, or foam aerosols and mists.

[0071] In one embodiment, the UV-blocking cosmetic composition of the present invention can be provided in gel form, lotion form, cream form, low viscosity liquid form, or fluid form. Specifically, it can be provided in lotion form, and more specifically, these forms may correspond to emulsified formulations. However, the present invention is not limited thereto.

[0072] In one embodiment, the UV-blocking cosmetic composition of the present invention can be used as a cosmetic composition for cosmetic cushions.

[0073] 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 has excellent long-term stability of the UV-blocking agent and solves 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.

[0074] In one embodiment, the cosmetic cushion can be made of various materials known in the industry. In a specific embodiment, the cosmetic cushion may be made of a polyurethane sponge. However, the present invention is not limited thereto.

[0075] In one embodiment, the cosmetic cushion can be commercialized as a sun cushion product with excellent ultraviolet blocking effect.

[0076] In one embodiment, the UV-blocking cosmetic composition of the present invention can be manufactured as various cosmetics with excellent UV-blocking effects, in addition to the aforementioned sun cushion product. Examples of such cosmetics include sun care products such as sun creams, sun sticks, sun milks, sun sprays, and sun lotions, and can also be manufactured as functional cosmetics such as nourishing creams, essences, ampoules, moisturizing creams, and eye creams, as well as basic cosmetics such as toners and lotions. However, the present invention is not limited in any way to these examples.

[0077] The following are examples and experimental examples to further illustrate the present invention, but the present invention is not limited to these.

[0078] Experimental Example 1. Confirmation of the time-dependent stability of polysilicone-15 - Analysis of its titer To identify organic UV-blocking agents suitable for sponges or cushions, the organic UV-blocking agents were impregnated into plastic vials or polyurethane sponges, and their long-term stability was confirmed by titer analysis. Specifically, polysilicone-15, ethylhexyl salicylate, ethylhexyl triazone, diethylamino hydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine were used as organic UV-blocking agents. Each was dissolved in butylene glycol dicaprylate / Dicaplate solvent to a concentration of 3% by weight, and then impregnated into plastic vials or polyurethane sponges. The titers of the plastic vials and polyurethane sponges containing the dissolved organic UV-blocking agents were measured, and after storage for one month under harsh conditions (40°C) or room temperature conditions (25°C), the titers of the stored samples were measured again to confirm the long-term stability of the organic UV-blocking agents.

[0079] The results of the titer analysis using the above method are shown in Table 1.

[0080] [Table 1]

[0081] According to Table 1 above, all organic UV-blocking agents except polysilicone-15 showed a tendency for their potency to decrease over time when stored impregnated in a sponge compared to storage in vials, under both harsh and room temperature conditions, confirming that they are unsuitable UV-blocking agents for application to sponges. In contrast, polysilicone-15 was confirmed to maintain its potency at the same level as the initial value in both vials and polyurethane sponges, confirming that it is a suitable UV-blocking agent for impregnation into sponges.

[0082] Experimental Example 2. Analysis of the potency of different UV-blocking agent components. (1) Manufacturing of Example 1 As shown in Table 2 below, Example 1 of the water-in-oil (W / O) formulation was prepared. Specifically, as organic UV-blocking agents, polysilicone-15, an oil-soluble organic UV-blocking agent that was confirmed to have excellent temporal stability even when impregnated into a sponge in Experimental Example 1, terephthalylidene dicamphor sulfonic acid / water (TDSA content: 33%), a water-soluble organic UV-blocking agent, and methylenebis-benzotriazolyltetramethylbutylphenol / decyl glucoside / glycerin / xanthan gum / water (MBBT content: 50%), a water-dispersible organic UV-blocking agent were used, and titanium dioxide / C was used as the inorganic UV-blocking agent. 12 ~C 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. In addition, polyacrylate crosspolymer-6 and poloxamer 188 were used as aqueous thickeners, and dextrin palmitate was used as an oily thickener. The units of content in Table 2 are weight percent.

[0083] [Table 2]

[0084] The specific manufacturing method is as follows:

[0085] The oil phase was heated to 70°C to 80°C to dissolve and disperse, and the aqueous phase was heated to 70°C to 80°C to thoroughly disperse. Next, the uniformly dispersed oil and aqueous phases were cooled to 40°C to 70°C, and then the aqueous phase was gradually added to the oil phase to emulsify. The mixture was then cooled to room temperature to complete the UV-blocking cosmetic composition of Example 1.

[0086] (2) Analysis of the potency of different UV blocking agents The UV-blocking cosmetic composition of Example 1 was impregnated into a sponge (finished product), and its potency was measured. The product was then stored for one month and three months under the same temperature conditions as in Experimental Example 1, and the potency was measured after each period to evaluate the stability of the UV-blocking agent over time. In addition, to confirm whether the UV-blocking agent was stabilized in the composition of Example 1, the example was not impregnated into a sponge but supported in a vial (semi-finished product (intermediate product)), stored for one month and three 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. Note that the amount of the remaining UV-blocking agent, excluding polysilicone, is indicated to reflect the ratio of UV-blocking agent in the raw materials used.

[0087] [Table 3]

[0088] According to Table 3, both the organic and inorganic UV-blocking agents contained in Example 1 had the same potency as immediately after impregnation into the sponge, confirming their excellent stability over time. Therefore, it was confirmed that the organic and inorganic UV-blocking agents of the present invention are stabilized in the cosmetic composition, and even when impregnated into a cosmetic cushion, the potency of the UV-blocking agents is stably maintained, allowing them to exhibit excellent UV-blocking effects.

[0089] Experiment Example 3. Comparative experiment based on the content of UV-blocking agents. (1) Manufacturing of the Examples and Comparative Examples As shown in Tables 4 and 5 below, using Example 1 as a reference, only the content of terephthalylidene dicamphor sulfonic acid / water or methylenebis-benzotriazolyltetramethylbutylphenol / decyl glucoside / glycerin / xanthan gum / water applied to the aqueous phase in the organic ultraviolet shielding agent was changed, while other components and their contents remained the same to produce the Examples and Comparative Examples.

[0090] [Table 4]

[0091] [Table 5]

[0092] (2) Long-term stability and sensory evaluation The long-term stability of the above-mentioned examples and comparative examples was evaluated, and the degree of stickiness and whitening during application were assessed.

[0093] For long-term stability evaluation, the formulation was stored for one month under low temperature (5°C), room temperature (25°C), and high temperature (40°C) conditions. The stability of the formulation was then evaluated to be the same as immediately after manufacture. If the formulation was unstable under any one of these temperature conditions, it was deemed unsatisfactory.

[0094] For the degree of stickiness, the degree of stickiness and ease of application were evaluated using a 5-point scale, with lower scores given for less stickiness, while applying the example or comparative example to the skin. For the whitening phenomenon, after applying the example or comparative example to the skin, whether or not excessive whitening occurred was observed visually, and this was evaluated using a 5-point scale, with higher scores given for improvement in the whitening phenomenon.

[0095] The evaluation results using the above method are shown in Tables 6 and 7.

[0096] (3) Measurement of UV protection effect To confirm the UV protection improvement effect of the above-mentioned examples and comparative examples, PA (Protection Grade of UVA) and SPF (Sun Protection Factor) measurements were performed in vitro. Specifically, 2.0 mg / cm³ of the samples were placed on polymethyl methacrylate (PMMA) plates for the examples and comparative examples. 2Samples were prepared by taking individual samples, applying them uniformly for 30 seconds, and then drying them in a dark room for 15 minutes. The UVAPF (UVA protection factor) and in vitro SPF values ​​were measured using a Labsphere UV-2000S in vitro SPF analyzer. The UVAPF and in vitro SPF values ​​are the average values ​​from three experiments, and the results are shown in Tables 6 and 7 below.

[0097] [Table 6]

[0098] [Table 7]

[0099] According to Table 6 above, when MBBT and TDSA are included in appropriate amounts, a highly stable formulation is formed over a long period of time, resulting in less stickiness and ease of use. Furthermore, the whitening phenomenon after application is minimal, making it advantageous for large-volume application. In addition, the organic / inorganic UV blocking agent components are well stabilized in the formulation, resulting in good UVAPF and SPF values, and demonstrably excellent UV blocking effect across a wide wavelength range.

[0100] In contrast, it was confirmed that if the content of either MBBT or TDSA was below the optimal level, the UV blocking effect was significantly reduced. Furthermore, it was confirmed that if the content of either MBBT or TDSA was above the optimal level, stickiness increased significantly, and the formulation stability also deteriorated. In particular, when MBBT was included at a high level, the whitening phenomenon became severe, making it unsuitable for use as a cosmetic composition.

[0101] Therefore, it was confirmed that appropriately adjusting the content of MBBT and TDSA applied to the dispersed aqueous phase is an important factor in realizing a cosmetic composition that exhibits excellent UV blocking effects across a wide wavelength range, as well as superior formulation stability and usability.

[0102] Experiment Example 4. Comparative experiment depending on the type of aqueous thickener. (1) Manufacturing of the Examples and Comparative Examples As shown in Table 8 below, the Examples and Comparative Examples were prepared by changing only the components and / or content of the aqueous thickener, using Example 1 as a reference, while keeping the other components and content the same.

[0103] [Table 8]

[0104] (2) Long-term stability and sensory evaluation The long-term stability of the examples and comparative examples manufactured as shown in Table 8 above was evaluated in the same manner as in Experimental Example 3, and the degree of stickiness was assessed. In addition, whether the cosmetic composition achieved an appropriate feel by changing the thickener was evaluated during the application process.

[0105] The evaluation results using the above method are shown in Table 9 below.

[0106] [Table 9]

[0107] According to Table 9 above, Examples 10 to 12, which included an acrylate-based thickener as an aqueous thickener, demonstrated excellent formulation stability, within an acceptable range of stickiness, and were easy to apply, resulting in a good user experience. In particular, Example 1, which contained both an acrylate-based thickener and poloxamer, showed a significantly improved degree of stickiness compared to Examples 10 to 12, and was confirmed to exhibit the best user experience. In contrast, in Comparative Examples 7 to 8, which did not use an acrylate-based thickener, Comparative Example 7, which used a cationic thickener, was found to undergo phase separation after high-temperature storage, and the formulation aggregated during the application process. Furthermore, Comparative Example 8, which used a polysaccharide thickener, was found to undergo phase separation after high-temperature storage, and the formulation became uneven during the application process, resulting in a poor user experience.

[0108] Therefore, including an acrylate-based thickener as an aqueous thickener is an important element in realizing a cosmetic composition for UV protection with excellent usability, and it was confirmed that stickiness is significantly improved when poloxamer is further included as an aqueous thickener.

[0109] Although specific parts of the present invention have been described in detail above, it will be clear to those with ordinary skill in the art that such specific descriptions are merely preferred embodiments and do not limit the scope of the invention. Therefore, the substantial scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An emulsified cosmetic composition for blocking ultraviolet rays, It contains an organic UV blocker, an inorganic UV blocker, and an aqueous thickener. The aforementioned organic ultraviolet blocking agent comprises at least one of the following: polysilicone-15, methylene bis-benzotriazolyltetramethylbutylphenol, and terephthalylidene dicamphor sulfonic acid, in a cosmetic composition for blocking ultraviolet rays.

2. The ultraviolet-blocking cosmetic composition according to claim 1, wherein the methylenebis-benzotriazolyltetramethylbutylphenol is contained in an amount of 0.2% to 3% by weight relative to the total weight of the ultraviolet-blocking cosmetic composition.

3. The ultraviolet-blocking cosmetic composition according to claim 1, wherein the terephthalylidene dicamphor sulfonic acid is contained in an amount of 0.5% to 6.5% by weight based on the total weight of the ultraviolet-blocking cosmetic composition.

4. The ultraviolet-blocking cosmetic composition according to claim 1, wherein the polysilicone-15 is contained in an amount of 0.01% to 10% by weight based on the total weight of the ultraviolet-blocking cosmetic composition.

5. The aforementioned aqueous thickener comprises an acrylate-based thickener, wherein the UV-blocking cosmetic composition is as described in claim 1.

6. The ultraviolet-blocking cosmetic composition according to claim 5, wherein the acrylate-based thickener is contained in an amount of 0.001% to 2% by weight relative to the total weight of the ultraviolet-blocking cosmetic composition.

7. The UV-blocking cosmetic composition according to claim 5, wherein the acrylate-based thickener comprises polyacrylate crosspolymer-6.

8. The UV-blocking cosmetic composition according to claim 5, further comprising poloxamer as the aqueous thickener.

9. The ultraviolet-blocking cosmetic composition according to claim 8, wherein the poloxamer is contained in an amount of 0.01% to 5% by weight relative to the total weight of the ultraviolet-blocking cosmetic composition.

10. The UV-blocking cosmetic composition according to claim 1, further comprising an oily thickener.

11. The cosmetic composition for blocking ultraviolet rays according to claim 1, wherein the inorganic ultraviolet blocking agent comprises at least one of titanium dioxide and zinc oxide.

12. The ultraviolet-blocking cosmetic composition according to claim 1, wherein the ultraviolet-blocking cosmetic composition is a water-in-oil (W / O) formulation or a water-in-silicone (W / S) formulation.

13. The ultraviolet-blocking cosmetic composition according to claim 1, characterized in that the ultraviolet-blocking cosmetic composition is for impregnation into a cosmetic cushion.

14. The UV-blocking cosmetic composition according to claim 1, characterized in that the UV-blocking cosmetic composition is at least one or more emulsified formulations from the dosage forms of cream, lotion, fluid, and gel.

15. A cosmetic cushion impregnated with the UV-blocking cosmetic composition described in any one of claims 1 to 14.

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