Composite stabilizer, water-resistant, moisturizing, sun-proof skin care product containing same, and preparation method of skin care product

Abstract

The present invention relates to a composite stabilizer, a moisturizing sunscreen skin care product containing the composite stabilizer, and a preparation method of the skin care product. The composite stabilizer comprises a polyol, bentonite and sodium di(laurylamide glutamine) lysine of (10-13): (0.6-1.0): (0.1-0.2). Relative to conventional techniques, the beneficial effects of the present application include: the present application uses a composite polyol, sodium di(laurylamide glutamine) lysine and bentonite as stabilizers, and under the condition of adding the stabilizer, it is possible to add a high content of hydrophobic nano titanium dioxide to an aqueous system such as oil-in-water, thereby obtaining a skin care product having water resistance, moisturizing and sunscreen effects at the same time, achieving the skin care purposes of being waterproof and sweat-proof, clear and lasting in concealing blemishes, and the obtained skin care product system is stable.

Description

Technical Field

[0001] The invention relates to the technical field of daily chemicals, and in particular to a composite stabilizer, a moisturizing sunscreen skin care product containing the composite stabilizer, and a preparation method of the skin care product. Background Art

[0002] There are many kinds of skin care products (such as foundation products) sold on the market, which are mainly divided into the following categories: oil-in-water type, water-in-oil type, all-oil type, and all-water type. Generally speaking, water-in-oil type and all-water type skin care products are weak in long-lasting makeup effect and water and sweat resistance, but perform better in moisturizing skin care effect, while oil-in-water type and all-oil type skin care products are better in long-lasting makeup effect and water resistance, but the skin feels relatively greasy after use, and it is not easy to add more skin care effect materials.

[0003] The sun is a huge radiation source, radiating a large amount of energy into space at all times. The ultraviolet rays can penetrate the surface of the skin. Even on cloudy days, 70% of the ultraviolet rays will still be projected onto the ground. Excessive exposure to ultraviolet rays can damage the human immune system, cause sunburn and tanning, accelerate skin aging, and lead to various skin diseases and even skin cancer. It has become a consensus to use sunscreen products to prevent sunburn, tanning and aging. As sunscreen products gradually become daily necessities, people's demands for sunscreen products are also increasing. Mildness and safety, high sun protection index, waterproof and sweat-resistant, good skin feel and use feel have become the basic criteria for selection.

[0004] However, in actual research and development, it is very difficult to add hydrophobic nano-titanium dioxide to, for example, an oil-in-water system. Problems such as material instability, surface roughness, and powder aggregation often occur. In addition, the formula of high-content (effective amount) nano-titanium dioxide has the problem of poor stability, and the combination with a hydrophilic titanium dioxide material will result in extremely poor water and sweat resistance.

[0005] In view of this, this application is hereby filed. Summary of the invention

[0006] One of the purposes of the embodiments of the present application includes providing a composite stabilizer. Under the condition of adding the composite stabilizer, a high amount of hydrophobic nano-titanium dioxide can be added to an aqueous system such as oil-in-water, thereby being able to prepare a skin care product with a stable system and water-resistant, moisturizing and sun-screening effects.

[0007] In a first aspect of the present application, a composite stabilizer is provided, comprising a polyol of (10-13):(0.6-1.0):(0.1-0.2), bentonite and sodium di(laurylamide glutamine) lysine.

[0008] In some embodiments of the present application, the polyol is selected from butanediol, 1,3-butanediol, glycerol, 1,3-propylene glycol, dipropylene glycol, 1,2-pentanediol or a combination thereof.

[0009] In a second aspect of the present application, a water-resistant, moisturizing, sunscreen skin care product is provided, the skin care product comprising the composite stabilizer described in the first aspect, a sunscreen, other functional additives, and water;

[0010] Wherein, the sunscreen contains hydrophobic nano titanium dioxide.

[0011] In some embodiments of the present application, the skin care product has one or more of the following technical features:

[0012] (1) The amount of the hydrophobic nano titanium dioxide in the skin care product is 6wt%-14wt%; and,

[0013] (2) The hydrophobic nano-titanium dioxide is selected from silicon-treated nano-titanium dioxide, stearic acid-treated nano-titanium dioxide or a combination thereof.

[0014] In some embodiments of the present application, the other functional auxiliary agent includes a hydrophobic pigment.

[0015] In some embodiments of the present application, the hydrophobic pigment has one or more of the following technical features:

[0016] (1) the amount of the hydrophobic pigment in the skin care product is 0.6wt%-1.5wt%; and,

[0017] (2) The hydrophobic pigment is selected from silicon-treated titanium dioxide, silicon-treated iron oxide red, silicon-treated iron oxide yellow, silicon-treated iron oxide black or a combination thereof.

[0018] In some embodiments of the present application, the skin care product has one or more of the following technical features:

[0019] (1) The pH value of the skin care product is 5.5-7.0; and,

[0020] (2) The type of the skin care product is gouache cream.

[0021] In some embodiments of the present application, the other functional auxiliary agents also include thickeners, sunscreens, emollients, emulsifiers, antioxidants, anti-allergic agents, thickeners, preservatives, moisturizers or combinations thereof.

[0022] In some embodiments of the present application, the skin care product has one or more of the following technical features:

[0023] (1) The thickener is xanthan gum;

[0024] (2) the sunscreen is selected from bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl hexyl benzoate, isopentyl p-methoxycinnamate, ethylhexyl salicylate or a combination thereof;

[0025] (3) The emollient is butyl octanol salicylate;

[0026] (4) the emulsifier is selected from C20-22 alcohol phosphate, C20-22 alcohol or a combination thereof;

[0027] (5) The antioxidant is tocopherol acetate, baobab seed extract or a combination thereof; (6) The anti-allergic agent is stearyl glycyrrhetinate;

[0028] (7) The thickener is selected from hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, sodium acrylate / sodium acryloyldimethyl taurate copolymer, polyacrylate-13, polyacrylate cross-linked polymer-6, or a combination thereof;

[0029] (8) the preservative is selected from phenoxyethanol, caprylyl glycol, ethylhexylglycerin, caprylhydroxamic acid or a combination thereof; and,

[0030] (9) The moisturizing agent is pea extract.

[0031] In some embodiments of the present application, the skin care product comprises:

[0032]

[0033]

[0034] In the third aspect of the present application, a method for preparing the water-resistant, moisturizing and sunscreen skin care product described in the second aspect is provided, the preparation method comprising the following steps: mixing the composite stabilizer, sunscreen, other functional additives and water.

[0035] Compared with the traditional technology, the beneficial effects of this application include:

[0036] The present application uses compounded polyols, sodium di(laurylamide glutamine) lysine, and bentonite as stabilizers. Under the condition of adding the stabilizer, a high content of hydrophobic nano-titanium dioxide can be added to an aqueous system such as oil-in-water, thereby obtaining a skin care product that has the effects of water resistance, moisturizing, and sun protection (for example, an SPF value of up to 50+, PA+++), achieving the purpose of waterproof and sweat-proof, clear, and long-lasting blemish-covering skin care, and the resulting skin care product system is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application and to more completely understand the present application and its beneficial effects, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0038] Figure 1 The diagram shows the sensory analysis results of the products of Examples and Comparative Examples. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings, embodiments and examples. It should be understood that these embodiments and examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. The purpose of providing these embodiments and examples is to make the understanding of the disclosure of the present invention more thorough and comprehensive. It should also be understood that the present invention can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various changes or modifications without violating the connotation of the present invention, and the equivalent form obtained also falls within the protection scope of the present application. In addition, in the description below, a large number of specific details are given in order to provide a more comprehensive understanding of the present invention. It should be understood that the present invention can be implemented without one or more of these details.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing implementation modes and embodiments and are not intended to limit the present invention.

[0041] the term

[0042] Unless otherwise specified or incompatible herewith, the terms and phrases used herein shall have the following meanings:

[0043] The terms "and / or", "or / and", and "and / or" used in this article include any one of two or more related listed items, and also include any and all combinations of related listed items, and the arbitrary and all combinations include 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 by at least two conjunctions selected from "and / or", "or / and", and "and / or", it should be understood that in this application, the technical solution undoubtedly includes technical solutions that are all connected by "logical and", and undoubtedly includes technical solutions that are all connected by "logical or". For example, "A and / or B" includes three parallel solutions of 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, the technical solution that is all connected by "logical OR"), and also includes any and all combinations of A, B, C, and D, that is, the combination of any two or any three of A, B, C, and D, and also includes the combination of four of A, B, C, and D (that is, the technical solution that is all connected by "logical AND").

[0044] In the present invention, "plurality", "multiple", "multiple times", "multiple" and the like, unless otherwise specified, refer to a number greater than or equal to 2. For example, "one or more" means one or greater than or equal to two.

[0045] As used herein, "combination thereof", "any combination thereof", "any combination thereof" etc. include all suitable combinations of any two or more of the listed items.

[0046] Herein, the “suitable” mentioned in “suitable combination”, “suitable method”, “any suitable method”, etc., shall be based on the ability to implement the technical solution of the present invention, solve the technical problem of the present invention, and achieve the expected technical effect of the present invention.

[0047] Herein, “preferred”, “better”, “more preferred” and “suitable” are merely used to describe implementation methods or examples with better effects, and it should be understood that they do not constitute limitations on the scope of protection of the present invention.

[0048] In the present invention, “further”, “furthermore”, “particularly”, etc. are used for descriptive purposes to indicate differences in content, but should not be construed as limiting the scope of protection of the present invention.

[0049] In the present invention, "optionally", "optional", and "optional" mean optional, that is, any one of the two parallel solutions of "yes" or "no". If multiple "options" appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent.

[0050] In the present invention, in the "first aspect", "second aspect", "third aspect", "fourth aspect", etc., the terms "first", "second", "third", "fourth", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0051] In the present invention, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0052] In the present invention, when it comes to numerical intervals (i.e., numerical ranges), unless otherwise specified, the optional numerical distribution is considered continuous within the above numerical interval, and includes the two numerical endpoints (i.e., the minimum value and the maximum value) of the numerical range, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to the integers within the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints. In this article, it is equivalent to directly listing each integer, such as t is an integer selected from 1 to 10, indicating that t is any integer selected from the group of integers consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10. In addition, when multiple ranges are provided to describe features or characteristics, these ranges can be combined. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all sub-ranges included therein.

[0053] The temperature parameters in the present invention, if not specifically limited, are allowed to be either constant temperature treatment or to vary within a certain temperature range. It should be understood that the constant temperature treatment allows the temperature to fluctuate within the precision range controlled by the instrument. Fluctuations within the range of ±5°C, ±4°C, ±3°C, ±2°C, and ±1°C are allowed.

[0054] In the present invention, % (w / w) and wt% both represent weight percentage, % (v / v) refers to volume percentage, and % (w / v) refers to mass volume percentage.

[0055] All documents mentioned in the present invention are cited as references in this application, just as each document is cited as a reference separately. Unless they conflict with the invention purpose and / or technical solution of the present application, the cited documents involved in the present invention are cited with all contents and all purposes. When the present invention involves cited documents, the definitions of relevant technical features, terms, nouns, phrases, etc. in the cited documents are also cited. When the present invention involves cited documents, the examples and preferred embodiments of the cited relevant technical features may also be incorporated into this application as references, but are limited to the ability to implement the present invention. It should be understood that when the content of the citation conflicts with the description in this application, the present application shall prevail or be modified adaptively according to the description of this application.

[0056] It is very difficult to add hydrophobic nano titanium dioxide to a conventional oil-in-water system, which is accompanied by problems such as unstable material, rough surface, and powder aggregation. The stability of the high-content titanium dioxide formula is poor, and the material with hydrophilic titanium dioxide has very poor water and sweat resistance. The present invention provides an oil-in-water sunscreen, water-resistant and moisturizing gouache cream and a preparation method thereof, with an SPF of up to 50+, PA+++. The stability is improved by adding sodium di(laurylamide glutamine) lysine, polyols and bentonite in a compound, and a high content of nano titanium dioxide is added to achieve excellent water resistance and facial blemish covering effects. The emulsifier uses Pellicer TM L-30 (INCI: sodium di(laurylamide glutamine) lysine, water) is a dipeptide anionic gemini amphiphilic compound with extremely high surface activity. It is derived from plant raw materials, can reduce environmental burden, and has high biodegradability. TM Add L-30 to polyol and bentonite, add the mixed powder and stir evenly to form a hydrophobic powder slurry, Pellicer TM L-30 helps the hydrophobic powder to be evenly dispersed in the water phase, and cooperates with bentonite to suspend and disperse the hydrophobic pigment in the water phase to form a slurry (pigment dispersion slurry). Previously, the water phase as an oil-in-water phase is heated and homogenized, and then the oil phase is added for emulsification. The oil-in-water formula has an excellent smooth texture and non-sticky feel.

[0057] In view of the above technical background, in the face of how to achieve the problem of how to ensure high-index sunscreen effect while covering blemishes, skin feel, moisturizing and poor smearing feeling, the present invention develops a sunscreen water-based cream with water resistance and moisturizing effect and a preparation method thereof. For oil-in-water skin, it can achieve a refreshing and non-greasy skin feel, and can also achieve the oil-in-water concealing and water-resistant effect, and evenly and naturally modify flawless skin. The main feature of the present invention is that the oil-in-water water-based cream has a sunscreen function, and overcomes the disadvantage of poor water-resistant performance of oil-in-water, and has a thin, clear and long-lasting concealing function in terms of skin feel.

[0058] The invention has excellent hydrophobicity by adding silicon-treated nano titanium dioxide, stearic acid-treated nano titanium dioxide, silicon-treated yellow iron oxide, silicon-treated red iron oxide and silicon-treated black iron oxide into the gouache cream formula.

[0059] Ethylhexyl methoxycinnamate is a UVB sunscreen, a marine-friendly sunscreen that can partially block UVA. It is widely used in sunscreen formulas with high sun protection factors. It can effectively absorb ultraviolet rays in sunlight to prevent human skin from getting red, tanned, or sunburned. Emulsifiers use Pellicer TM L-30 (INCI: sodium di(laurylamide glutamine) lysine, water), a non-ionic emulsifier composed of natural amino acids and fatty acids with high emulsifying ability, can disperse hydrophobic powders in water. Powders treated with sodium di(laurylamide glutamine) lysine can be stably dispersed in oil-in-water formulas.

[0060] Gouache cream is a base makeup product, used as a base before makeup, and generally used to cover blemishes. Among many foundation products, gouache cream is relatively light and thin, easy to apply, and has a clear and natural blemish-covering effect after makeup, making it very popular.

[0061] The first aspect of the present application

[0062] The present application provides a composite stabilizer, which comprises a polyol of (10-13): (0.6-1.0): (0.1-0.2), bentonite and sodium di(laurylamide glutamine) lysine.

[0063] Optionally, the polyol is selected from butanediol, 1,3-butanediol, glycerol, 1,3-propylene glycol, dipropylene glycol, 1,2-pentanediol or a combination thereof. Optionally, the polyol is butanediol.

[0064] The second aspect of the present application

[0065] The present application discloses a water-resistant, moisturizing and sun-proof skin care product, which comprises the composite stabilizer described in the first aspect, a sunscreen, other functional additives and water;

[0066] Wherein, the sunscreen contains hydrophobic nano titanium dioxide.

[0067] Optionally, the skin care product has one or more of the following technical features:

[0068] (1) The amount of the hydrophobic nano titanium dioxide in the skin care product is 6wt%-14wt%; and,

[0069] (2) The hydrophobic nano-titanium dioxide is selected from silicon-treated nano-titanium dioxide, stearic acid-treated nano-titanium dioxide or a combination thereof.

[0070] Optionally, the other functional auxiliary agents include hydrophobic pigments.

[0071] Optionally, the hydrophobic pigment has one or more of the following technical features:

[0072] (1) the amount of the hydrophobic pigment in the skin care product is 0.6wt%-1.5wt%; and,

[0073] (2) The hydrophobic pigment is selected from silicon-treated titanium dioxide, silicon-treated iron oxide red, silicon-treated iron oxide yellow, silicon-treated iron oxide black or a combination thereof.

[0074] Optionally, the skin care product has one or more of the following technical features:

[0075] (1) The pH value of the skin care product is 5.5-7.0; and,

[0076] (2) The type of the skin care product is gouache cream.

[0077] The pH value of the skin care product is adjusted using a pH adjuster, which can be selected from, including but not limited to: arginine, triethanolamine, citric acid, sodium citrate, and one or more of them can be selected.

[0078] Optionally, the other functional auxiliary agents further include thickeners, sunscreens, emollients, emulsifiers, antioxidants, anti-allergic agents, thickeners, preservatives, moisturizers or combinations thereof.

[0079] Optionally, the skin care product has one or more of the following technical features:

[0080] (1) The thickener is xanthan gum;

[0081] (2) the sunscreen is selected from bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl hexyl benzoate, isopentyl p-methoxycinnamate, ethylhexyl salicylate or a combination thereof;

[0082] (3) The emollient is butyl octanol salicylate;

[0083] (4) the emulsifier is selected from C20-22 alcohol phosphate, C20-22 alcohol or a combination thereof;

[0084] (5) The antioxidant is tocopherol acetate, baobab seed extract or a combination thereof;

[0085] (6) The anti-allergic agent is stearyl glycyrrhetinate;

[0086] (7) The thickener is selected from hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, sodium acrylate / sodium acryloyldimethyl taurate copolymer, polyacrylate-13, polyacrylate cross-linked polymer-6, or a combination thereof;

[0087] (8) the preservative is selected from phenoxyethanol, caprylyl glycol, ethylhexylglycerin, caprylhydroxamic acid or a combination thereof; and,

[0088] (9) The moisturizing agent is pea extract.

[0089] Optionally, the skin care product comprises:

[0090]

[0091] Optionally, the skin care product comprises:

[0092]

[0093]

[0094] The third aspect of the present application

[0095] The present application provides a method for preparing the water-resistant, moisturizing and sun-screening skin care product described in the second aspect, the preparation method comprising the following steps: mixing the composite stabilizer, sunscreen, other functional additives and water. Specific embodiments

[0097] The embodiments of the present invention will be described in detail below in conjunction with examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples that do not specify specific conditions are preferably referred to the guidance provided in the present invention, and can also be based on the experimental manual or normal conditions in this area, can also be based on the conditions recommended by the manufacturer, or refer to experimental methods known in the art.

[0098] In the following specific embodiments, the measured parameters of raw material components may have slight deviations within the range of weighing accuracy unless otherwise specified. For temperature and time parameters, acceptable deviations caused by instrument test accuracy or operation accuracy are allowed.

[0099] Example 1 to Example 3

[0100] Embodiment 1 to embodiment 3 respectively provide a water-resistant, moisturizing, sunscreen water-based powder cream, and the formula is shown in Table 1.

[0101] The preparation method of the water-resistant, moisturizing and sun-proof water-based powder cream provided in Examples 1 to 3 comprises the following steps:

[0102] (1) Add the ingredients of phase A into the main pot in sequence, stir and disperse evenly until there are no particles, and set aside;

[0103] (2) Weigh the raw materials of phase B, grind them with a high-speed grinder until the color develops, and set aside;

[0104] (3) Add the phase B ingredients in small amounts to the main pot several times while stirring until evenly mixed. Add the phase C ingredients and heat to 80-85°C while stirring until evenly mixed. Continue stirring.

[0105] (4) Weigh the D phase raw materials and add them into the oil phase pot, heat to 80-85°C, stir and dissolve completely, and set aside;

[0106] (5) Add the ingredients of phase D to the main pot, homogenize for 3-5 minutes, and begin to cool down while stirring;

[0107] (6) Cool down to room temperature, add the raw materials of phase E and stir well.

[0108] Comparative Example 1

[0109] This comparative example is a comparative example of Example 3, and the main difference from Example 3 is that no polyol, bentonite and sodium di(laurylamide glutamine) lysine are added. The remaining ingredients, contents and preparation methods are the same as those of Example 3.

[0110] Table 1

[0111]

[0112]

[0113] Comparative Example 2

[0114] This comparative example is a comparative example of Example 3, and the main difference with respect to Example 3 is that butylene glycol is replaced by glycerol polyether-26. The remaining ingredients, contents and preparation methods are the same as those in Example 3.

[0115] Comparative Example 3

[0116] This comparative example is a comparative example of Example 3, and the main difference with respect to Example 3 is that bentonite is replaced by hectorite. The remaining components, contents and preparation methods are the same as those of Example 3.

[0117] Comparative Example 4

[0118] This comparative example is a comparative example of Example 3, and the main difference with respect to Example 3 is that sodium di(lauryl glutamine) lysine is replaced by sodium stearoyl glutamate. The remaining ingredients, contents and preparation methods are the same as those of Example 3.

[0119] Comparative Example 5

[0120] This comparative example is a comparative example of Example 3. The main difference from Example 3 is that the ratio of butylene glycol, glycerol, bentonite and sodium di(laurylamide glutamine) lysine is different. Specifically, the ratio of polyol, bentonite and sodium di(laurylamide glutamine) lysine in this comparative example is 20:1:0.28. The remaining ingredients, contents and preparation methods are the same as those in Example 3.

[0121] Performance Testing

[0122] 1. Sun protection value assessment

[0123] (1) Method: FilmQAPro software in vitro UV detection method was used, and Gafchromic film (similar to skin tissue equivalence, medical grade accuracy, average effective nuclear charge number Zeff = 6.8, human skin Zeff = 7.4. The charge number in the film is used to measure the performance changes of the material after radiation exposure, and a systematic analysis is performed. The film is divided into two types: HD-V2 (for testing SPF value) and EBT-3 (for testing PA value).) was applied to the sample, weighed according to the amount of 2 mg / cm2, and evenly applied to the film, placed in an opaque place and allowed to stand for 20 minutes (film formation time), and then placed in a sunlight-simulating box for irradiation for 10 minutes. The charge number in the film is used to measure the performance changes of the material after radiation exposure, and then the irradiated film is analyzed and processed by FilmQAPro software under the standard curve.

[0124] (2) Evaluation results: It can be seen from the table that the SPF values ​​of the sunscreen water-based creams of Examples 1, 2, and 3 are as high as 50+, indicating that the sunscreen water-based creams of the present invention have excellent sunscreen effects and can significantly improve the ability to resist UV damage. The comparative test results show that the addition of hydrophobic powder has a strong synergistic effect and can significantly improve the sunscreen effect.

[0125] Table 2

[0126]

[0127] 2. Moisturizing performance test

[0128] (1) Experimental steps:

[0129] Test environment temperature: 20℃-22℃, humidity 40-60%, the test subjects sit quietly in a constant temperature and humidity room for 30 minutes, test the skin on the inner arm (3cm×3cm), and use the Corneometer CM 825 skin moisture test probe to test the moisture of the skin before using the sample, recorded as m0. Test subjects: 10 female volunteers aged between 18 and 50

[0130] Take equal amounts of the samples of the embodiment and the comparative example, apply them to the test site, wait for 15 minutes to let the samples dry naturally on the skin, and test the skin moisture at 30min, 60min, 90min, and 120min, respectively, recorded as mn, n = 30min or 60min;

[0131] Calculate the change in skin moisture, the change in skin moisture content △n=mn-m0.

[0132] (2) Test results: It can be seen from the above experimental results that the sunscreen water-based cream of the present invention has a better moisturizing effect than the comparative example, based on the comprehensive data of skin humidity change.

[0133] Table 3

[0134]

[0135]

[0136] 3. Sensory analysis and evaluation

[0137] (1) Test samples: the sunscreen water-based creams of Examples 1 to 3, and Comparative Examples 1 to 5 are control examples.

[0138] (2) Testers: 30 people in total, including 10 males and 20 females, aged 18-49 years old, who met the voluntary selection criteria.

[0139] (3) Evaluation method: Apply 70ul of the sample on the back of the hand, and use the other hand to gently smear it 8 times. Evaluate the sample's moisturizing feel, spreadability, skin adhesion, natural bare makeup feel, and comfort after use in turn. Soak the sample in water for 3 minutes after application to test its water resistance, and then score it (0-10 points, the higher the score, the better the product's moisturizing feel, spreadability, skin adhesion, natural bare makeup feel, and water resistance).

[0140] (4) Evaluation results: After application, the comprehensive scores of the subjects were statistically analyzed. The results are as follows: Figure 1 The results show that the moisturizing feeling, spreadability and skin-fitting property of Examples 1-3 of the present invention and Comparative Examples 1-5 are better; the water resistance of the nano titanium dioxide treated with no silicon addition and the nano titanium dioxide treated with stearic acid in the comparative example is poorer than that of the examples, and there is no natural nude makeup feeling. The natural nude makeup feeling and water resistance of the water-based powder creams of Examples 1-3 of the present invention are significantly better than those of the comparative example.

[0141] 4. Stability

[0142] The stability of the liquid cymene obtained in Examples 1-3 and Comparative Examples 1-5 was investigated.

[0143] The sample was divided into three equal parts. The first part was placed at 48°C, the second part was placed at -18°C, and the third part was placed at 25°C. The samples were observed for oil, water and stratification after 24h, 72h, 7d, 14d and 30d. The results are shown in Table 4-6.

[0144] Table 4

[0145]

[0146]

[0147] Table 5

[0148]

[0149] Table 6

[0150]

[0151] As shown in Tables 4-6, in Examples 1-3, the samples prepared by compounding polyols, bentonite and sodium di(laurylamide glutamine) lysine have good stability at high temperature, low temperature and room temperature. In Comparative Examples 1-5, the samples prepared by changing any one of the components of polyols, bentonite and sodium di(laurylamide glutamine) lysine in the formula and changing the ratio cannot pass the stability test.

[0152] The technical features of the above-mentioned implementation modes and examples can be combined in any appropriate manner. To make the description concise, not all possible combinations of the technical features in the above-mentioned implementation modes 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.

[0153] The above-described embodiments only express several implementation methods of the present invention, which is convenient for understanding the technical solutions of the present invention in detail, but cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that, for those of ordinary skill in the art, without departing from the concept of the present invention, several variations and improvements can be made, which all belong to the protection scope of the present invention. In addition, it should be understood that after reading the above-mentioned teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and the equivalent forms obtained also fall within the protection scope of this application. It should also be understood that the technical solutions obtained by those skilled in the art on the basis of the technical solutions provided by the present invention through logical analysis, reasoning or limited experiments are all within the protection scope of the claims attached to the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the contents of the attached claims, and the description and drawings can be used to explain the contents of the claims.

Claims

1. A composite stabilizer, characterized in that: The composite stabilizer is (10-13): (0.6-1.0): (0.1-0.2) polyol, bentonite and sodium di(laurylamide glutamine) lysine; The polyol is butanediol.

2. A water-resistant, moisturizing, sun-proof and skin-care product, characterized in that: The skin care product comprises the composite stabilizer according to claim 1, a sunscreen, other functional additives and water; Wherein, the sunscreen contains hydrophobic nano titanium dioxide.

3. The water-resistant, moisturizing, sun-proof and skin-care product according to claim 2, characterized in that: The skin care product has one or two of the following technical features: (1) The amount of the hydrophobic nano titanium dioxide in the skin care product is 6wt%-14wt%; and, (2) The hydrophobic nano-titanium dioxide is selected from silicon-treated nano-titanium dioxide, stearic acid-treated nano-titanium dioxide or a combination thereof.

4. The water-resistant, moisturizing, sun-proof and skin-care product according to claim 2, characterized in that: The other functional assistants include hydrophobic pigments.

5. The water-resistant, moisturizing, sun-proof and skin-care product according to claim 4, characterized in that: The hydrophobic pigment has one or two of the following technical features: (1) the amount of the hydrophobic pigment in the skin care product is 0.6wt%-1.5wt%; and, (2) The hydrophobic pigment is selected from silicon-treated titanium dioxide, silicon-treated iron oxide red, silicon-treated iron oxide yellow, silicon-treated iron oxide black or a combination thereof.

6. The water-resistant, moisturizing, sun-proof and skin-care product according to any one of claims 2 to 5, characterized in that: The skin care product has one or two of the following technical features: (1) The pH value of the skin care product is 5.5-7.0; and, (2) The type of skin care product is gouache cream.

7. The water-resistant, moisturizing, sun-proof and skin-care product according to claim 6, characterized in that: The other functional auxiliary agents also include sunscreens, moisturizers, emulsifiers, antioxidants, anti-allergic agents, thickeners, preservatives, moisturizers or combinations thereof.

8. The water-resistant, moisturizing, sun-proof and skin-care product according to claim 7, characterized in that: The skin care product has one or more of the following technical features: (1) The sunscreen is selected from bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl hexyl benzoate, isopentyl p-methoxycinnamate, ethylhexyl salicylate or a combination thereof; (2) The emollient is butyl octanol salicylate; (3) the emulsifier is selected from C20-22 alcohol phosphate, C20-22 alcohol or a combination thereof; (4) The antioxidant is tocopherol acetate, baobab seed extract or a combination thereof; (5) The anti-allergic agent is stearyl glycyrrhetinate; (6) The thickener is selected from xanthan gum, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, sodium acrylate / sodium acryloyldimethyl taurate copolymer, polyacrylate-13, polyacrylate cross-linked polymer-6, or a combination thereof; (7) the preservative is selected from phenoxyethanol, caprylyl glycol, ethylhexylglycerin, caprylhydroxamic acid or a combination thereof; and, (8) The moisturizing agent is pea extract.

9. The water-resistant, moisturizing, sun-proof and skin-care product according to claim 8, characterized in that: The skin care product comprises: Butanediol 10wt%-13wt%, Xanthan gum 0.1wt%-0.2wt%, Bentonite 0.6wt%-1wt%, Sodium di(laurylamide glutamine) lysine 0.1wt%-0.2wt%, Silicon treated nano titanium dioxide 3wt%-7wt%, Stearic acid treated nano titanium dioxide 3wt%-7wt%, Silicon treated titanium dioxide 0.5wt%-1wt%, Silicon treated red iron oxide 0.01wt%-0.05wt%, Silicon treated iron oxide yellow 0.09wt%-0.36wt%, Silicon treated iron oxide black 0.01wt%-0.05wt%, Bis-ethylhexyloxyphenol methoxyphenyl triazine 0.8wt%-1.6wt%, Diethylaminohydroxybenzoyl hexyl benzoate 1.5wt%-2.5wt%, Isoamyl p-methoxycinnamate 4wt%-8wt%, Ethylhexyl salicylate 2wt%-6wt%, Butyl octanol salicylate 2wt%-5wt%, C20-22 alcohol phosphate 1.1wt%-1.65wt%, C20-22 alcohol 0.9wt%-1.35wt% Tocopherol acetate 0.1wt%-0.2wt%, Stearyl glycyrrhetinate 0.1wt%-0.2wt%, Hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer 0.6wt%-0.8wt%, Phenoxyethanol 0.4wt%-0.5wt%, Caprylyl glycol 0.1wt%-0.2wt%, Baobab seed extract 0.1wt%-1wt%, and, Pea extract 0.1wt%-1wt%.

10. The method for preparing the water-resistant, moisturizing, sun-proof and skin-care product according to any one of claims 2 to 9, characterized in that: The preparation method comprises the following steps: mixing the composite stabilizer, sunscreen, other functional additives and water.

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