Sunscreen potentiators and sunscreen cosmetics

Abstract

The present application relates to the cosmetic technical field, especially relates to sunscreen synergist and sunscreen cosmetic. The composition of the sunscreen synergist includes butyl octyl alcohol salicylate, maltitol and polymethylsilsesquioxane. The sunscreen synergist of the present application is suitable for physical sunscreen agent, chemical sunscreen agent or the compound system of both, which effectively improves the protection level, use comfort and safety.

Description

Technical Field

[0001] This application relates to the field of cosmetic technology, and in particular to sunscreen enhancers and sunscreen cosmetics. Background Technology

[0002] In the sunscreen industry, Sun Protection Factor (SPF) and UVA Protection Rating (PA) are core indicators for evaluating a product's UV protection performance. SPF reflects the ability to protect against UVB rays, determining the skin's resistance to sunburn and redness; a higher SPF indicates stronger protection. PA reflects the ability to protect against UVA rays, indicated by a "+" sign, and is directly related to the skin's ability to resist tanning and photoaging. As consumers' demand for sunscreen continues to increase, products with high SPF (e.g., SPF50+) and high PA (e.g., PA++++) ratings are increasingly favored by the market.

[0003] Sunscreens are mainly divided into physical sunscreens and chemical sunscreens. Physical sunscreens, represented by titanium dioxide and zinc oxide, work by reflecting and scattering ultraviolet rays. Chemical sunscreens, represented by chemical ingredients such as ethylhexyl methoxycinnamate, diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate, octocrylene, and homosalyl ester, absorb ultraviolet rays and convert them into heat energy.

[0004] To achieve high SPF protection levels, sunscreen products typically require higher concentrations of physical sunscreens, chemical sunscreens, or a combination of both. However, simply increasing the amount of sunscreen agents to achieve high SPF protection is not only inefficient but also exacerbates skin feel degradation and safety risks. CN118105315A discloses a sunscreen synergist comprising: a powder comprising an HDI / trimethylolhexyl lactone crosspolymer and / or lauroyl lysine; and a composite film-forming agent comprising dextrin isostearate and trimethylsiloxysilicate. This sunscreen enhancer can improve the uniformity of the sunscreen film on the skin, thereby releasing the theoretical SPF value. However, it fails to solve the compatibility problem when physical and chemical sunscreens are combined, limiting its applicability to either physical or chemical sunscreens alone. Furthermore, HDI / trimethylolhexyl lactone crosspolymer, as a powder, poses a risk of increased agglomeration when coexisting with physical sunscreen powders. Trimethylsiloxysilicate forms a film with slightly poor local continuity and is prone to voids. Dextrin isostearate has a slow film-forming speed and feels greasy at high concentrations. While the combination of these two improves the situation somewhat, problems such as uneven film formation, insufficient oil resistance, noticeable roughness after application, and brittle, easily cracked films still exist. Additionally, skin breathability decreases after film formation, affecting user comfort. Summary of the Invention

[0005] To address the aforementioned technical problems, one or more embodiments of this application provide sunscreen enhancers and sunscreen cosmetics. These sunscreen enhancers are suitable for physical sunscreens, chemical sunscreens, or a combination of both, effectively improving protection levels, user comfort, and safety.

[0006] The first aspect of this application provides a sunscreen enhancer comprising butyl octyl salicylate, maltitol, and polymethyl silsesquioxane.

[0007] In some embodiments, the mass ratio of the butyl octyl salicylate, the maltitol, and the polymethyl silsesquioxane is (5-7):(5-7):(1-2).

[0008] The second aspect of this application provides a sunscreen cosmetic, the composition of which includes a sunscreen agent, a sunscreen synergist, and a solvent;

[0009] The sunscreen agent comprises physical sunscreens and chemical sunscreens;

[0010] The sunscreen enhancer mentioned above is the same as the sunscreen enhancer described above.

[0011] In some embodiments, the weight ratio of the physical sunscreen to the chemical sunscreen is (4-6):1.

[0012] In some embodiments, the sunscreen comprises, by weight percentage: 8%-25% of the sunscreen agent, 3%-25% of the sunscreen enhancer, and 50%-89% of the solvent.

[0013] In some embodiments, the physical sunscreen agent includes a physical sunscreen ingredient and a surface treatment agent for the physical sunscreen ingredient;

[0014] The physical sunscreen ingredients include one or more of titanium dioxide and zinc oxide;

[0015] The surface treatment agent includes one or more of triethoxyoctylsilane and aluminum hydroxide;

[0016] The chemical sunscreen agent includes chemical sunscreen ingredients and antioxidants of the chemical sunscreen ingredients;

[0017] The chemical sunscreen ingredients include one or more of the following: ethylhexyl methoxycinnamate, diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate, octocrylene, and homosalate.

[0018] The antioxidants include one or more of butylated hydroxytoluene, tocopherol, tocopheryl acetate, ascorbic acid, ascorbyl palmitate, and coenzyme Q10.

[0019] The solvent includes one or more of water and isododecane.

[0020] In some embodiments, the sunscreen cosmetic further includes one or more of stabilizers, antioxidants, emulsifiers, emollients, film-forming agents, thickeners, and preservatives.

[0021] In some embodiments, the sunscreen cosmetic comprises, by weight percentage: 10%-15% of the sunscreen agent, 5%-10% of the sunscreen synergist, 0.5%-2% of the stabilizer, 0.1%-1% of the antioxidant, 2%-8% of the emulsifier, 2%-5% of the emollient, 2%-5% of the film-forming agent, 0.5%-2% of the thickener, 0.1%-1% of the preservative, and 51%-76.8% of the solvent.

[0022] In some embodiments, the sunscreen cosmetic satisfies one or more of the following characteristics:

[0023] (1) The stabilizer includes one or more of magnesium sulfate, sodium chloride, potassium chloride, magnesium stearate, silyl silica and dimethyl silyl silica;

[0024] (2) The antioxidants include one or more of butylated hydroxytoluene, tocopherol, tocopheryl acetate, ascorbic acid, ascorbyl palmitate and coenzyme Q10;

[0025] (3) The emulsifier includes one or more of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-10 polydimethylsiloxane, sorbitan isostearate, PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane and sorbitan sesquioleate;

[0026] (4) The emollient includes one or more of the following: alkanes, silicone oils, and synthetic oils;

[0027] (5) The film-forming agent includes one or more of the following: acrylate / polytrimethylsiloxane methacrylate copolymer phenyl polytrimethylsiloxane, acrylate / polydimethylsiloxane copolymer cyclopentapolydimethylsiloxane, trimethylsiloxysilicate, polyacrylate, polypropylsilsesquioxane and polyvinylpyrrolidone;

[0028] (6) The thickener comprises one or more of silachlor bentonite, quaternary ammonium salt-18 bentonite, and distearate dimethylammonium lithium montmorillonite;

[0029] (7) The preservatives include one or more of methylparaben, ethylparaben, propylparaben, phenoxyethanol, benzyl alcohol, chlorphenesin, potassium sorbate, sodium benzoate, 1,2-hexanediol, capryloyl hydroxamic acid, p-hydroxyacetophenone, ethylhexylglycerin and caprylyl glycol.

[0030] In some embodiments, the sunscreen cosmetic is a sunscreen lotion, sunscreen cream, sunscreen foundation, sunscreen cushion, sunscreen powder cream, sunscreen concealer, or sunscreen concealer paste.

[0031] The sun protection factor of the sunscreen cosmetic is SPF50+.

[0032] The sunscreen synergist of this application includes butyl octyl salicylate, maltitol, and polymethyl silsesquioxane. Butyl octyl salicylate acts as a compatibility bridge between physical and chemical sunscreens, wetting and coating the surface of physical sunscreen particles while dissolving chemical sunscreens and inhibiting aggregation and delamination caused by polarity differences. Maltitol acts as an aqueous phase regulator, improving skin feel, reducing oiliness and stickiness, and assisting in the formation of a uniform hydrophilic film during water evaporation, filling voids in the oil phase film formation. Polymethyl silsesquioxane acts as a powder dispersant and skin feel regulator, preventing powder particle aggregation through steric hindrance and providing a silky powder feel while absorbing excess oil. Through the synergistic effect of the above three components, the sunscreen enhancer of this application can simultaneously achieve the stable coexistence of physical sunscreens and chemical sunscreens, uniform dispersion of powder, improvement of film continuity and density, and significant improvement of skin feel. It can increase the actual SPF value with the same amount of sunscreen agent and reduce the amount of sunscreen agent while maintaining the same level of protection.

[0033] The sunscreen cosmetic of this application contains the above-mentioned sunscreen synergist, thereby overcoming the defects of the prior art such as incompatibility between physical and chemical sunscreens, powder agglomeration, oily feel, uneven film formation and marginal reduction of sun protection efficiency, and achieving a combination of high protection, refreshing feel and long-term stability. Detailed Implementation

[0034] The present application is further described below with reference to embodiments and examples. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the application. Furthermore, it should be understood that after reading the teachings of this application, those skilled in the art can make various alterations or modifications to this application, and these equivalent forms also fall within the protection scope of the appended claims.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0036] The term "and / or" as used herein includes any one of two or more related listed items, as well as any and all combinations of the related listed items. These arbitrary and all combinations encompass any two related listed items, any more related listed items, or a combination of all related listed items. It should be noted that when at least three items are connected using at least two conjunctions selected from "and / or," it should be understood that, in this application, the technical solution undoubtedly includes solutions connected by "logical AND," and also undoubtedly includes solutions connected by "logical OR." For example, "A and / or B" includes three parallel solutions: A, B, and A+B. For example, the technical solution of "A, AND / OR, B, AND / OR, C, AND / OR, D" includes any one of A, B, C, and D (that is, a technical solution that is connected by "logical OR"), as well as any and all combinations of A, B, C, and D, that is, combinations of any two or three of A, B, C, and D, and also combinations of all four of A, B, C, and D (that is, a technical solution that is connected by "logical AND").

[0037] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0038] In this application, numerical intervals (i.e., numerical ranges) are involved. Unless otherwise specified, optional numerical distributions within the aforementioned numerical intervals are considered continuous and include the two endpoints (i.e., the minimum and maximum values) of the numerical range, as well as every value between these two endpoints. Unless otherwise specified, when a numerical interval points to integers within that interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints. Furthermore, when multiple ranges are provided to describe features or characteristics, these ranges may be merged. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all subranges to which they are included.

[0039] In this application, weight can be a well-known unit of mass in the cosmetics field, such as μg, mg, g, or kg.

[0040] The first aspect of this application provides a sunscreen enhancer comprising butyl octyl salicylate, maltitol, and polymethyl silsesquioxane.

[0041] In some embodiments, the mass ratio of butyl octyl salicylate, maltitol, and polymethyl silsesquioxane is (5-7):(5-7):(1-2), for example, it can be 5:5:1, 5:5:2, 5:6:1, 5:6:2, 5:7:1, 5:7:2, 6:5:1, 6:5:2, 6:6:1, 6:6:2, 6:7:1, 6:7:2, 7:5:1, 7:5:2, 7:6:1, 7:6:2, 7:7:1, 7:7:2, etc.

[0042] The second aspect of this application provides a sunscreen cosmetic, the composition of which includes sunscreen agents, sunscreen synergists and solvents;

[0043] Sunscreens consist of physical sunscreens and chemical sunscreens;

[0044] The sunscreen enhancer is the sunscreen enhancer mentioned above.

[0045] In some embodiments, the weight ratio of physical sunscreen to chemical sunscreen is (4-6):1, for example, it can be 4:1, 5:1, 6:1, etc.

[0046] In some embodiments, the product comprises, by weight percentage: 8%-25% sunscreen agent, 3%-25% sunscreen synergist, and 50%-89% solvent; wherein the weight percentage of sunscreen agent is selected from 8%-25%, such as 8%, 10%, 12%, 15%, 20%, 22%, 25%, etc., the weight percentage of sunscreen synergist is selected from 3%-25%, such as 3%, 5%, 10%, 15%, 20%, 25%, etc., and the weight percentage of solvent is selected from 50%-89%, such as 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 89%, etc.

[0047] In some embodiments, physical sunscreens include physical sunscreen ingredients and surface treatment agents for physical sunscreen ingredients.

[0048] In some embodiments, physical sunscreen ingredients include one or more of titanium dioxide and zinc oxide.

[0049] In some embodiments, the surface treatment agent includes one or more of triethoxyoctylsilane and aluminum hydroxide.

[0050] In some embodiments, the amount of surface treatment is 5%-10% of the total mass of the physical sunscreen ingredients, preferably containing triethoxyoctylsilane and aluminum hydroxide in a weight ratio of 1:(0.8-1.2).

[0051] In some embodiments, chemical sunscreens include chemical sunscreen ingredients and antioxidants of the chemical sunscreen ingredients.

[0052] In some embodiments, the chemical sunscreen ingredients include one or more of ethylhexyl methoxycinnamate, hexyl diethylamino hydroxybenzoyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0053] In some embodiments, the antioxidant includes one or more of butylated hydroxytoluene, tocopherol, tocopheryl acetate, ascorbic acid, ascorbyl palmitate, and coenzyme Q10.

[0054] In some embodiments, the amount of antioxidant used is 0.05%-0.1% of the total mass of the chemical sunscreen ingredients, and preferably, the antioxidant is butylated hydroxytoluene (BHT).

[0055] In some embodiments, the solvent includes one or more of water and isododecane.

[0056] In some embodiments, sunscreen cosmetics may further include one or more of stabilizers, antioxidants, emulsifiers, emollients, film-forming agents, thickeners, and preservatives.

[0057] In some embodiments, the sunscreen cosmetic comprises, by weight percentage: 10%-15% sunscreen agent, 5%-10% sunscreen synergist, 0.5%-2% stabilizer, 0.1%-1% antioxidant, 2%-8% emulsifier, 2%-5% emollient, 2%-5% film-forming agent, 0.5%-2% thickener, 0.1%-1% preservative, and 51%-76.8% solvent; wherein the weight percentage of the sunscreen agent is selected from 10%-15%, for example 10%, 11%, 12%, 13%, 14%, 15%, etc.; the weight percentage of the sunscreen synergist is selected from 5%-10%, for example 5%, 6%, 7%, 8%, 9%, 10%, etc.; the weight percentage of the stabilizer is selected from 0.5%-2%, for example 0.5%, 1%, 1.5%, 2%, etc.; and the antioxidant... The weight percentage of the following components is selected from 0.1% to 1%, such as 0.1%, 0.5%, 1%, etc.; the weight percentage of the emulsifier is selected from 2% to 8%, such as 2%, 4%, 6%, 8%, etc.; the weight percentage of the emollient is selected from 2% to 5%, such as 2%, 3%, 4%, 5%, etc.; the weight percentage of the film-forming agent is selected from 2% to 5%, such as 2%, 3%, 4%, 5%, etc.; the weight percentage of the thickener is selected from 0.5% to 2%, such as 0.5%, 1%, 1.5%, 2%, etc.; the weight percentage of the preservative is selected from 0.1% to 1%, such as 0.1%, 0.5%, 1.0%, etc.; and the weight percentage of the solvent is selected from 51% to 76.8%, such as 51%, 55%, 60%, 65%, 70%, 75%, 76.8%, etc.

[0058] In some embodiments, antioxidants are present as components of chemical sunscreens in appropriate amounts (e.g., 0.01%-0.1% by weight, such as 0.01%, 0.02%, 0.05%, 0.06%, 0.08%, 0.1%), and surfactants are present as components of physical sunscreens in appropriate amounts (e.g., 5%-10% by weight, such as 5%, 6%, 7%, 8%, 9%, 10%). In cosmetics containing chemical sunscreens, physical sunscreens, and solvents, one or more of stabilizers, emulsifiers, emollients, film-forming agents, thickeners, and preservatives are also present.

[0059] In some embodiments, the chemical sunscreen agent comprises ethylhexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and ethylhexyl methoxycinnamate in a weight ratio of 1:(0.8-1.2):(7-9).

[0060] In some embodiments, the surfactant in the physical sunscreen includes a 1:(0.8-1.2) ratio of triethoxyoctylsilane and aluminum hydroxide.

[0061] In some embodiments, the sunscreen cosmetic comprises, by weight percentage: 10%-15% sunscreen agent, 5%-10% sunscreen synergist, 0.5%-2% stabilizer, 2%-8% emulsifier, 2%-5% emollient, 2%-5% film-forming agent, 0.5%-2% thickener, 0.1%-1% preservative, and 52.5%-76.5% solvent; wherein the weight percentage of the sunscreen agent is selected from 10%-15%, for example, 10%, 11%, 12%, 13%, 14%, 15%, etc.; the weight percentage of the sunscreen synergist is selected from 5%-10%, for example, 5%, 6%, 7%, 8%, 9%, 10%, etc.; and the weight percentage of the stabilizer is selected from 0.5%-2%, for example, 0.5%, 1%, 1%, etc. The weight percentage of emulsifiers can be selected from 2% to 8%, such as 2%, 4%, 6%, 8%, etc.; the weight percentage of emollients can be selected from 2% to 5%, such as 2%, 3%, 4%, 5%, etc.; the weight percentage of film-forming agents can be selected from 2% to 5%, such as 2%, 3%, 4%, 5%, etc.; the weight percentage of thickeners can be selected from 0.5% to 2%, such as 0.5%, 1%, 1.5%, 2%, etc.; the weight percentage of preservatives can be selected from 0.1% to 1%, such as 0.1%, 0.5%, 1.0%, etc.; the weight percentage of solvents can be selected from 52.5% to 76.5%, such as 52.5%, 55%, 60%, 65%, 70%, 75%, 76.5%, etc.

[0062] In some embodiments, the stabilizer includes one or more of magnesium sulfate, sodium chloride, potassium chloride, magnesium stearate, silylsilane, and dimethylsilylsilane. Preferably, the stabilizer is magnesium sulfate.

[0063] In some embodiments, the antioxidant includes one or more of butylated hydroxytoluene, tocopherol, tocopheryl acetate, ascorbic acid, ascorbyl palmitate, and coenzyme Q10.

[0064] In some embodiments, the emulsifier comprises one or more of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-10 polydimethylsiloxane, sorbitan isostearate, PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, lauryl PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, and sorbitan sesquioleate. Preferably, the emulsifier is a mixture of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-10 polydimethylsiloxane, and sorbitan isostearate. Further, the mass ratio of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-10 polydimethylsiloxane, and sorbitan isostearate is (2-4):1:(0.7-0.9), for example, 3:1:0.8.

[0065] In some embodiments, the emollient includes one or more of alkanes, silicone oils, and synthetic oleic acid compounds. Preferably, the emollient is phenyl polytrimethylsiloxane.

[0066] In some embodiments, the film-forming agent includes one or more of acrylate / polytrimethylsiloxane methacrylate copolymer, acrylate / polydimethylsiloxane copolymer, trimethylsiloxysilicate, polyacrylate, polypropylene silsesquioxane, and polyvinylpyrrolidone. Preferably, the film-forming agent is trimethylsiloxysilicate.

[0067] In some embodiments, the thickener includes one or more of silachlor bentonite, quaternary ammonium salt-18 bentonite, and distearate dimethylammonium lithium montmorillonite. Preferably, the thickener is distearate dimethylammonium lithium montmorillonite.

[0068] In some embodiments, the preservative includes one or more of methylparaben, propylparaben, phenoxyethanol, chlorphenesin, 1,2-hexanediol, capryloyl hydroxamic acid, p-hydroxyacetophenone, and ethylhexylglycerin.

[0069] One or more embodiments of this application also provide a method for preparing the sunscreen cosmetic described above, including:

[0070] S1. Mix maltitol in the sunscreen enhancer, stabilizer, and water in the solvent to obtain the first mixture;

[0071] S2. Heat the raw materials of the chemical sunscreen to 80°C and stir to dissolve until there are no obvious particles, to obtain the second mixture;

[0072] S3. Add butyl octyl salicylate and polymethyl silsesquioxane from the sunscreen synergist to the second mixture, as well as emulsifiers, emollients, film-forming agents, thickeners, raw materials of physical sunscreens, preservatives, and non-aqueous components (such as isododecane) in the solvent, mix and disperse evenly to obtain the third mixture;

[0073] S4. Add the first mixture to the third mixture and mix until evenly dispersed.

[0074] In some embodiments, the sun protection cosmetic is a sunscreen lotion, sunscreen cream, sunscreen foundation, sunscreen cushion, sunscreen powder, sunscreen concealer, or sunscreen concealer paste.

[0075] In some embodiments, the sun protection factor of the sunscreen cosmetic is SPF50+.

[0076] The following are some specific examples.

[0077] For experimental parameters not specified in the following specific embodiments, please refer to the guidelines provided in this application, or consult experimental manuals or other known experimental methods in the field, or refer to the manufacturer's recommended experimental conditions. Raw materials and reagents not mentioned can be obtained commercially, or can be prepared by those skilled in the art using known methods.

[0078] The preparation steps for the examples and comparative examples are as follows:

[0079] The sunscreen formulations of Examples 1 and Comparative Examples 10-13 are detailed in Table 1 by weight.

[0080] Table 1. Formulations of Example 1 and Comparative Examples 10-13

[0081]

[0082] The preparation method includes the following steps:

[0083] (1) Mix raw materials 1, 4 and 19 to obtain the first mixture;

[0084] (2) Heat raw materials No. 8, 9, 10 and 11 to 80°C and stir until dissolved and no obvious particles are visible to obtain the second mixture;

[0085] (3) Add raw materials No. 2, 3, 5, 6, 7, 12, 13, 14, 15, 16, 17, 18 and 20 to the second mixture and mix them evenly to obtain the third mixture;

[0086] (4) Add the first mixture to the third mixture and mix until evenly dispersed.

[0087] Comparative Example 1

[0088] This comparative example uses essentially the same formulation and preparation method as Example 1, except that maltitol is replaced with an equal part by weight of glycerol.

[0089] Comparative Example 2

[0090] This comparative example uses essentially the same formulation and preparation method as Example 1, except that maltitol is replaced with an equal weight of propylene glycol.

[0091] Comparative Example 3

[0092] This comparative example uses essentially the same formulation and preparation method as Example 1, except that maltitol is replaced with an equal part by weight of butanediol.

[0093] Comparative Example 4

[0094] This comparative example uses essentially the same formulation and preparation method as Example 1, except that butyl octyl salicylate is replaced with an equal weight of phenyl polytrimethylsiloxane.

[0095] Comparative Example 5

[0096] This comparative example uses essentially the same formulation and preparation method as Example 1, except that octyl polymethylsiloxane is used instead of butyl octyl salicylate in equal parts by weight.

[0097] Comparative Example 6

[0098] This comparative example uses essentially the same formulation and preparation method as Example 1, except that butyl octyl salicylate is replaced with an equal weight of polydimethylsiloxane.

[0099] Comparative Example 7

[0100] This comparative example uses essentially the same formulation and preparation method as Example 1, except that isononyl isononanoate is used instead of polymethylsilsesquioxane in equal parts by weight.

[0101] Comparative Example 8

[0102] This comparative example uses essentially the same formulation and preparation method as Example 1, except that an equal part by weight of triglyceride (ethylhexanoate) is used instead of polymethylsilsesquioxane.

[0103] Comparative Example 9

[0104] This comparative example uses essentially the same formulation and preparation method as Example 1, except that polymethylsilsesquioxane is replaced with an equal weight of caprylic / capric triglyceride.

[0105] Comparative Examples 10-13

[0106] Comparative Examples 10-13 used essentially the same formulation and preparation method as Example 1, except that the weight parts were adjusted. The detailed formulations are shown in Table 1.

[0107] Sunscreen performance testing:

[0108] Using a UV2000 transmittance analyzer, the application of sunscreen products on human skin was simulated. By measuring the ability of the simulated skin (substrate) coated with sunscreen to block ultraviolet rays, the protection factor (SPF) was calculated. The test results are shown in Table 2.

[0109] Table 2. Sunscreen efficacy of the sunscreens in the examples and comparative examples.

[0110]

[0111] As shown in the results of Example 1 and Comparative Examples 1-3, replacing maltitol with other moisturizers (glycerin, butylene glycol, propylene glycol) resulted in a poorer synergistic effect. As shown in the results of Example 1 and Comparative Examples 4-6, replacing the existing carrier with the carrier of other physical sunscreens resulted in a poorer synergistic effect. As shown in the results of Example 1 and Comparative Examples 7-9, replacing the existing carrier with the carrier of other chemical sunscreens resulted in a poorer synergistic effect. As shown in the results of Example 1 and Comparative Examples 10-13, the mass ratio of butyl octyl salicylate, maltitol, and methyl silsesquioxane did not meet the requirement of 1-6:1-6:0.1-2.4, resulting in a poorer synergistic effect.

[0112] Blind test of skin feel:

[0113] The skin feel of the sunscreens in the examples and comparative examples was evaluated using the following methods:

[0114] 1. The target population is men and women aged 25-45;

[0115] 2. The scoring item is out of 10. The final data is obtained by removing the highest and lowest scores and taking the average.

[0116] 3. Apply an appropriate amount of sample to the arm or face for testing. Score the spreadability, film-forming speed, stickiness, and oiliness using a weighted average (25%, 25%, 25%, 25%).

[0117] Table 3. Skin feel of the sunscreens in the examples and comparative examples.

[0118]

[0119] As can be seen from the above skin feel test results, the sunscreen agent in the embodiment performs better in all four dimensions: spreadability, film-forming speed, stickiness, and oiliness. In contrast, the comparative example only achieves partial effectiveness or even complete ineffectiveness. Overall, the embodiment is significantly superior to the comparative example. This indicates that the skin feel of the sunscreen agent in this application is significantly improved.

[0120] The technical features of the above-described embodiments and examples can be combined in any suitable manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments and examples are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above merely illustrate several implementation methods of this application and should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Furthermore, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this application, and the equivalent forms obtained also fall within the protection scope of this application. It should also be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the protection scope of the appended claims. Therefore, the protection scope of this patent application should be determined by the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A sunscreen synergist, characterized in that, The sunscreen enhancer comprises butyl octyl salicylate, maltitol, and polymethyl silsesquioxane.

2. The sunscreen synergist according to claim 1, characterized in that, The mass ratio of the butyl octyl salicylate, the maltitol, and the polymethyl silsesquioxane is (5-7):(5-7):(1-2).

3. A sunscreen cosmetic, characterized in that, The composition of the sunscreen cosmetic includes sunscreen agents, sunscreen synergists, and solvents; The sunscreen agent comprises physical sunscreens and chemical sunscreens; The sunscreen enhancer is the sunscreen enhancer as described in claim 1 or 2.

4. The sunscreen cosmetic according to claim 3, characterized in that, The weight ratio of the physical sunscreen to the chemical sunscreen is (4-6):

1.

5. The sunscreen cosmetic according to claim 3 or 4, characterized in that, It comprises, by weight percentage: 8%-25% of the sunscreen agent, 3%-25% of the sunscreen enhancer, and 50%-89% of the solvent.

6. The sunscreen cosmetic according to claim 3 or 4, characterized in that, The physical sunscreen agent includes physical sunscreen ingredients and a surface treatment agent for the physical sunscreen ingredients; The physical sunscreen ingredients include one or more of titanium dioxide and zinc oxide; The surface treatment agent includes one or more of triethoxyoctylsilane and aluminum hydroxide; The chemical sunscreen agent includes chemical sunscreen ingredients and antioxidants of the chemical sunscreen ingredients; The chemical sunscreen ingredients include one or more of the following: ethylhexyl methoxycinnamate, diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate, octocrylene, and homosalate. The antioxidants include one or more of butylated hydroxytoluene, tocopherol, tocopheryl acetate, ascorbic acid, ascorbyl palmitate, and coenzyme Q10. The solvent includes one or more of water and isododecane.

7. The sunscreen cosmetic according to claim 3 or 4, characterized in that, It also includes one or more of the following: stabilizers, antioxidants, emulsifiers, emollients, film-forming agents, thickeners, and preservatives.

8. The sunscreen cosmetic according to claim 7, characterized in that, The product comprises, by weight percentage: 10%-15% of the sunscreen agent, 5%-10% of the sunscreen synergist, 0.5%-2% of the stabilizer, 0.1%-1% of the antioxidant, 2%-8% of the emulsifier, 2%-5% of the emollient, 2%-5% of the film-forming agent, 0.5%-2% of the thickener, 0.1%-1% of the preservative, and 51%-76.8% of the solvent.

9. The sunscreen cosmetic according to claim 7, characterized in that, It meets one or more of the following characteristics: (1) The stabilizer includes one or more of magnesium sulfate, sodium chloride, potassium chloride, magnesium stearate, silyl silica and dimethyl silyl silica; (2) The antioxidants include one or more of butylated hydroxytoluene, tocopherol, tocopheryl acetate, ascorbic acid, ascorbyl palmitate and coenzyme Q10; (3) The emulsifier includes one or more of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-10 polydimethylsiloxane, sorbitan isostearate, PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane and sorbitan sesquioleate; (4) The emollient includes one or more of the following: alkanes, silicone oils, and synthetic oils; (5) The film-forming agent includes one or more of the following: acrylate / polytrimethylsiloxane methacrylate copolymer phenyl polytrimethylsiloxane, acrylate / polydimethylsiloxane copolymer cyclopentapolydimethylsiloxane, trimethylsiloxysilicate, polyacrylate, polypropylsilsesquioxane and polyvinylpyrrolidone; (6) The thickener comprises one or more of silachlor bentonite, quaternary ammonium salt-18 bentonite, and distearate dimethylammonium lithium montmorillonite; (7) The preservatives include one or more of methylparaben, ethylparaben, propylparaben, phenoxyethanol, benzyl alcohol, chlorphenesin, potassium sorbate, sodium benzoate, 1,2-hexanediol, capryloyl hydroxamic acid, p-hydroxyacetophenone, ethylhexylglycerin and caprylyl glycol.

10. The sunscreen cosmetic according to any one of claims 3-4 and 8-9, characterized in that, The sun protection cosmetics include sunscreen lotion, sunscreen cream, sunscreen foundation, sunscreen cushion, sunscreen powder cream, sunscreen concealer, or sunscreen concealer paste; The sun protection factor of the sunscreen cosmetic is SPF50+.

Images