Oil-in-water type sunscreen colored face cream and preparation method thereof

Abstract

The invention provides an oil-in-water type sunscreen colored face cream and a preparation method thereof.The oil-in-water type sunscreen colored face cream is prepared from, by weight, 60-80 parts of a water-phase component, 20-30 parts of a water-phase component, 20-30 parts of a water-phase component, 20-30 parts of a water-phase component, 20-30 parts of a water-phase component, 20-30 parts of a water-phase component, 20-30 parts of a water-phase component and 20-30 parts of a water-phase component, comprising water, a thickening agent, a humectant and a first auxiliary agent; 20 to 40 parts of an oil phase component; comprising an emulsifier, a sun-screening agent, a coloring agent and a second auxiliary agent, the coloring agent comprises hydrogenated lecithin and coloring powder wrapped and modified by lauroyl lysine; the sun-screening agent comprises silica and physical sun-screening powder wrapped and modified by polydimethylsiloxane. According to the oil-in-water type sunscreen colored face cream, by selecting the multi-wrapping modified coloring powder and the physical sunscreen powder, the dispersity, the stability, the moisture retention property, the makeup holding property and the adaptability of the inorganic powder in an oil-in-water type sunscreen colored face cream system are improved, and the oil-in-water type sunscreen colored face cream which is high in moistening degree, good in makeup holding property, good in stability and good in sunscreen performance is obtained.

Description

Technical Field

[0001] The present application belongs to the technical field of facial creams, and specifically relates to an oil-in-water type sunscreen colored facial cream and a preparation method thereof. Background Art

[0002] Tinted cream refers to a cream with a tinted effect. It combines the skin care properties of a cream with the skin tone modification function of a base makeup product. It can nourish the skin while providing a natural color modification, making the skin tone look more even and bright.

[0003] As consumers pursue beauty and pay more and more attention to skin care, colored cream, as an innovative product that perfectly combines skin care and beauty functions, stands out in the cosmetics market and is gradually favored by consumers. Its market demand is also growing continuously.

[0004] In the cosmetics market, sunscreen products are essential for daily skin care, and their performance and user experience have always been the focus of research and development. As consumers' requirements for product versatility and skin feel increase, sunscreen products are gradually shifting to oil-in-water (O / W) types, which are popular for their refreshing skin feel and good stability.

[0005] However, when adding color ingredients to water-in-oil sunscreen products to make colored creams, the technical difficulty increases significantly, and it is easy to have poor stability, poor makeup durability and poor moisturizing properties. Summary of the invention

[0006] The present application provides an oil-in-water type sunscreen tinted facial cream and a preparation method thereof, aiming to improve the stability, makeup durability and moisturizing property of the oil-in-water type sunscreen tinted facial cream, and having a good sunscreen effect.

[0007] The first aspect of the present application provides an oil-in-water type sunscreen colored facial cream, characterized in that, based on 100 parts by weight of the total weight of the oil-in-water type sunscreen colored facial cream, the oil-in-water type sunscreen colored facial cream comprises the following components in parts by weight:

[0008] Water phase components: 60 to 80 parts; including water, thickener, humectant and first auxiliary agent;

[0009] Oil phase components: 20 to 40 parts; including emulsifier, sunscreen, colorant and second auxiliary agent; colorant includes hydrogenated lecithin and lauroyl lysine coated modified coloring powder; sunscreen includes silica and polydimethylsiloxane coated modified inorganic sunscreen powder.

[0010] In a feasible implementation manner of the first aspect of the present application, the thickener includes a copolymer of acrylic acid or its derivatives and glycerol polyacrylate.

[0011] In a feasible implementation manner of the first aspect of the present application, the mass content of the copolymer of acrylic acid or its derivatives in the oil-in-water type sunscreen tinted cream is 0.18% to 0.3%.

[0012] In a feasible implementation manner of the first aspect of the present application, the weight portion of the copolymer of acrylic acid or its derivatives is 0.18 to 0.3 parts, and the weight portion of glycerol polyacrylate is 0.05 to 0.3 parts.

[0013] In a feasible embodiment of the first aspect of the present application, the hydrogenated lecithin and lauroyl lysine coated modified colored powder includes hydrogenated lecithin and lauroyl lysine coated modified titanium dioxide, hydrogenated lecithin and lauroyl lysine coated modified iron oxide yellow powder, hydrogenated lecithin and lauroyl lysine coated modified iron oxide red powder and hydrogenated lecithin and lauroyl lysine coated modified iron oxide black powder in a mass ratio of (0.89-81.2):(4.07-30):(1.72-3):1, which can be optionally (15.25-81.2):(12.75-30):(2.25-7):1.

[0014] In a feasible embodiment of the first aspect of the present application, the emulsifier includes one or more of a first emulsifier, a second emulsifier, a third emulsifier and a fourth emulsifier:

[0015] Optionally, the hydrophilic-lipophilic balance value of the first emulsifier is 20 to 30;

[0016] Optionally, the hydrophilic-lipophilic balance value of the second emulsifier is 5 to 15, and the viscosity is 8000 mPa·s to 15000 mPa·s;

[0017] Optionally, the hydrophilic-lipophilic balance value of the third emulsifier is 5 to 15, and the viscosity is 1500 mPa·s to 2500 mPa·s;

[0018] Optionally, the hydrophile-lipophile balance value of the fourth emulsifier is 8-15.

[0019] In a feasible embodiment of the first aspect of the present application, the sunscreen agent also includes one or more of ethylhexyl salicylate, octylcholine, benzophenone, homosalate, ethylhexyl methoxycinnamate, disodium phenyl dibenzimidazole tetrasulphate, butyl methoxydibenzoylmethane and diethylaminohydroxybenzoyl hexyl benzoate.

[0020] In a feasible implementation of the first aspect of the present application, based on 100 parts by weight of the total oil-in-water sunscreen tinted cream, the oil-in-water sunscreen tinted cream includes the following components in parts by weight:

[0021] Water phase components: 60 to 80 parts; including 43 to 45 parts of water, 13 to 15 parts of moisturizer, 3 to 5 parts of thickener, 1 to 2 parts of skin conditioner, 0.5 to 1.5 parts of preservative, and 0.03 to 0.07 parts of pH adjuster;

[0022] Oil phase components: 20 to 40 parts; including 2 to 4 parts of emulsifier, 14 to 16 parts of sunscreen, 0.06 to 0.6 parts of moisturizer, dispersant, and 4 to 6 parts of colorant.

[0023] In a feasible implementation of the first aspect of the present application, the first auxiliary agent includes one or more of a skin conditioner, an emulsifier, a preservative and a pH adjuster; and / or; the second auxiliary agent includes one or a combination of an emollient and a dispersant.

[0024] In a feasible implementation manner of the first aspect of the present application, the oil-in-water type sunscreen tinted cream satisfies at least one of the following conditions:

[0025] a. Emulsifiers include glyceryl stearate, polyacrylate-13, PEG-100 stearate, sorbitan isostearate, sodium stearoyl glutamate, polysorbate-20, sodium acrylate / sodium acryloyldimethyl taurate copolymer, sorbitan oleate, polysorbate-80, sorbitan sesquiisostearate and polyglyceryl-3 diisostearate and at least 4 thereof;

[0026] b. Moisturizers include one or more of glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, methyl gluceth-20, glycereth-26 and trehalose;

[0027] c. Skin conditioning agents include one or more of acetylated sodium hyaluronate, hydrolyzed sodium hyaluronate, sodium hyaluronate cross-linked polymer, betaine, saccharomyces cerevisiae fermentation product filtrate and bisabolol extract;

[0028] d. preservatives include one or more of phenoxyethanol, p-hydroxyacetophenone, ethylhexylglycerin, 1,2-hexanediol, 1,2-pentanediol, sodium benzoate, sorbic acid, potassium sorbate, sorbitan caprylate and glyceryl caprylate;

[0029] e. pH adjusting agents include one or more of sodium hydroxide, triethanolamine, tromethamine and arginine;

[0030] f. Emollients include one or more of hydrogenated polyisobutene, squalane, isononyl isononanoate, octyldodecanol, cyclopentasiloxane, dimethicone, isohexadecane, caprylyl methicone, caprylic / capric triglyceride and triethylhexanoin;

[0031] g. The dispersant includes one or more of phenyl trimethicone, octyldodecanol, polyglyceryl-2 triisostearate, dimethicone and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone.

[0032] The second aspect of the present application provides a method for preparing an oil-in-water type sunscreen colored cream, comprising:

[0033] Water phase component: placing a thickener, a moisturizing agent and a first auxiliary agent in water, mixing and homogenizing to obtain a water phase component;

[0034] Oil phase component: an emulsifier, a sunscreen, a colorant and a second auxiliary agent are mixed evenly to obtain an oil phase component; the colorant includes a coloring powder modified by encapsulating hydrogenated lecithin and lauroyl lysine; the sunscreen includes an inorganic sunscreen powder modified by encapsulating silica and polydimethylsiloxane;

[0035] The oil phase component and the water phase component are mixed and homogenized to obtain an oil-in-water type sunscreen tinted cream. DETAILED DESCRIPTION

[0036] In order to make the invention purpose, technical scheme and beneficial technical effect of the present application clearer, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the embodiments described in this specification are only for explaining the present application, not for limiting the present application.

[0037] For simplicity, only some numerical ranges are explicitly disclosed herein. However, any lower limit can be combined with any upper limit to form an unambiguous range; and any lower limit can be combined with other lower limits to form an unambiguous range, and any upper limit can be combined with any other upper limit to form an unambiguous range. In addition, although not explicitly stated, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be combined with any other point or single value as its own lower limit or upper limit or with other lower limits or upper limits to form an unambiguous range.

[0038] In the description herein, when a composition is described as containing, comprising or including specific components, or when a process is described as containing, comprising or including specific process steps, it is expected that the composition of the present application also consists essentially of or consists of the components, and the process of the present application also consists essentially of or consists of the process steps.

[0039] The use of the terms "including," "comprising," "containing," and "having" should generally be interpreted as open ended and non-limiting unless expressly stated otherwise.

[0040] In the description of this article, it should be noted that, unless otherwise specified, “above” and “below” are inclusive of the number itself, and the “multiple” in “one or more” means more than two.

[0041] The above-mentioned summary of the invention of the present application is not intended to describe each disclosed embodiment or each implementation in the present application. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided by a series of examples, which can be used in various combinations. In each example, enumeration is only used as a representative group and should not be interpreted as exhaustive.

[0042] First of all, the core of the water-in-oil emulsion system is how to effectively disperse various ingredients such as oily sunscreens, emulsifiers, thickeners, etc. in the water phase, while maintaining the stability and fluidity of the system; in addition, the selection of raw materials such as oily sunscreens, emulsifiers, thickeners, etc. also has a great impact on the skin feel of the product. This requires cosmetic formulators to have a high level of technical skills in the selection of raw materials, adjustment of ingredient ratios, and process control. However, when introducing color powder raw materials, due to the differences in the physical and chemical properties of the colorant itself, its dispersion state in the system, stability, and impact on the sunscreen effect have become problems that need to be solved urgently.

[0043] Secondly, sunscreen effect is the core indicator of sunscreen products. Traditional sunscreens are mostly oil-soluble, and their solubility, dispersibility and interaction with pigments in water-in-oil systems may affect the final sunscreen performance.

[0044] It is worth exploring that traditional sunscreens are divided into chemical sunscreens and physical sunscreens (also known as inorganic sunscreens or inorganic sunscreen powders). Chemical sunscreens do not have a significant effect on improving the sun protection index of products, and the cosmetics safety regulations limit their use. Therefore, they are often formulated with physical sunscreens that have a stronger ability to improve the sun protection index to improve the product's sun protection index. However, whether it is a chemical sunscreen or a physical sunscreen, its special physical and chemical properties have a great impact on the stability and skin feel of the product. Therefore, how to balance the stability and skin feel of the product is also a challenge in the reasonable selection of sunscreens.

[0045] Compared with chemical sunscreens, the same amount of physical sunscreens can contribute more to the SPF value, but physical sunscreens also have a greater impact on the stability of water-in-oil systems. Commonly used physical sunscreen powders on the market, such as titanium dioxide surface modifiers, are inorganic surface modifiers aluminum oxide (Al2O3), and nano titanium dioxide treated with aluminum can easily cause system demulsification in water-in-oil systems. The main reasons may be as follows:

[0046] Reason 1: Aluminum ion influence. Aluminum ions can combine with negatively charged substances such as phosphatidylcholine in the emulsion to form a complex, which will change the properties of the oil-water interface, making the originally stable emulsion unstable, thus leading to demulsification.

[0047] Reason 2: Charge balance is destroyed. Emulsifiers in water-in-oil emulsions usually carry a certain charge, which helps maintain the stability of the emulsion. However, the addition of aluminum ions may break this charge balance, making the arrangement of emulsifier molecules at the oil-water interface disordered, thereby reducing the stability of the emulsion. When the emulsion loses stability, the oil droplets tend to coalesce, leading to demulsification.

[0048] Reason 3: Interfacial film destruction. The stability of the oil-in-water emulsion depends largely on the properties of its interfacial film. The interfacial film is formed by the directional arrangement of emulsifier molecules on the oil-water interface, which can prevent the aggregation of oil droplets and maintain the stability of the emulsion. However, when aluminum ions combine with the components in the emulsion, the stability of this interfacial film may be destroyed, the interaction between the oil droplets is enhanced, and aggregation is likely to occur, resulting in demulsification.

[0049] Furthermore, skin feel is one of the important factors for consumers to choose sunscreen products, and its optimization cannot be ignored. Although water-in-oil sunscreen products are more refreshing than water-in-oil products, how to maintain a light and non-greasy skin feel after adding colorants, as well as easy application and absorption, is another major challenge in the product development process.

[0050] Oil-in-water sunscreen tinted cream can provide a natural finishing effect on the skin. The product can have a certain coverage effect and at the same time have considerable long-lasting performance. However, the long-lasting performance of current oil-in-water products is far inferior to that of oil-in-water products. Therefore, how to achieve a natural makeup effect while maintaining a certain degree of long-lasting coverage is a difficult problem that needs to be solved.

[0051] In addition to solving the above difficulties, color stability is also a problem that colored sunscreen products must face. Since pigments may change color or fade due to factors such as light, temperature, and pH value, how to improve the stability of pigments in the system and ensure that the color of the product remains unchanged during use is also a key issue that needs to be considered during the research and development process.

[0052] The present application provides an oil-in-water type sunscreen colored facial cream and a preparation method thereof, which can improve the stability, makeup durability and moisturizing property of the oil-in-water type sunscreen colored facial cream and has a good sunscreen effect.

[0053] In the embodiment of the first aspect of the present application, there is provided an oil-in-water type sunscreen colored facial cream, characterized in that, based on 100 parts by weight of the total oil-in-water type sunscreen colored facial cream, the oil-in-water type sunscreen colored facial cream comprises the following components in parts by weight:

[0054] Water phase components: 60 to 80 parts; including water, thickener, humectant and first auxiliary agent;

[0055] Oil phase components: 20 to 40 parts; including emulsifier, sunscreen, colorant and second auxiliary agent; colorant includes hydrogenated lecithin and lauroyl lysine coated modified coloring powder; sunscreen includes silica and polydimethylsiloxane coated modified inorganic sunscreen powder.

[0056] The coloring powder in the oil-in-water type sunscreen colored cream of the present application is modified by encapsulation with hydrogenated lecithin and lauroyl lysine, lauroyl lysine is the first coating layer (i.e., coated on the surface of the coloring powder), and hydrogenated lecithin is the second coating layer (i.e., coated on the surface of the lauroyl lysine layer), wherein the mass of the lauroyl lysine coating layer is 1% to 3% of the mass of the coloring powder, and the mass of the hydrogenated lecithin coating layer is 2% to 5% of the mass of the coloring powder. The coloring powder is modified by encapsulation with hydrogenated lecithin and lauroyl lysine, which can increase the hydrophobicity of the powder, make the color powder more durable on the skin, not easily affected by sweat and grease, and can complement the weaker anti-sebum property of the hydrogenated lecithin of the second coating layer. The double-encapsulated modified coloring powder has both the moisturizing and skin-friendly properties of hydrogenated lecithin, and enhances the hydrophobicity and makeup-lasting properties of the color powder, and the oil-in-water type sunscreen colored cream of the present application has good adaptability.

[0057] The inorganic sunscreen powder in the oil-in-water sunscreen colored cream of the present application is modified by encapsulation with silica and polydimethylsiloxane, the polydimethylsiloxane is the first coating layer (i.e., coated on the surface of the inorganic sunscreen powder), and the silica is the second coating layer (i.e., coated on the surface of the polydimethylsiloxane layer), wherein the mass of the silica coating layer is 11% to 13% of the mass of the inorganic sunscreen powder, and the mass of the polydimethylsiloxane coating layer is 1% to 2% of the mass of the inorganic sunscreen powder. The inorganic sunscreen powder (such as titanium dioxide, zinc oxide) modified by encapsulation with silica and polydimethylsiloxane has significantly improved dispersibility in the oil-in-water cream system, and the occurrence of agglomeration and insoluble aluminum complexes is significantly reduced, which can improve the demulsification, oiling and stratification of the system; it can also improve the bad crystallization caused by the formation of insoluble aluminum complexes and improve the demulsification of the system. The physical sunscreen powder of the present application does not contain aluminum, and can also improve the safety performance of the product.

[0058] By selecting colored powders and inorganic sunscreen powders that have been modified by multiple coatings, the present application can improve the dispersibility and stability of inorganic powders in a water-in-oil type sunscreen colored cream system, and can also improve its moisturizing properties, makeup lasting properties and adaptability, thereby obtaining a water-in-oil type sunscreen colored cream with high moisturizing properties, good makeup lasting properties, good stability and good sunscreen performance.

[0059] At the same time, the physical sunscreen powder double-treated with silica and polydimethylsiloxane in the present application has a high SPF contribution value and has excellent compatibility with the thickener acrylic used in the present application, further improving the stability of the product.

[0060] In some embodiments, the thickener includes a copolymer of acrylic acid or its derivatives and glycerol polyacrylate. Optionally, the copolymer of acrylic acid or its derivatives can be an acrylic acid (ester) copolymer.

[0061] Thickeners (also called suspending agents or suspension thickeners) can increase the dispersion of dispersed phase particles, making the oil phase particles more evenly dispersed in the water phase. This can not only improve the fineness and texture of the product, but also make key ingredients such as sunscreens and colorants more evenly distributed in the product, thereby ensuring the product's sunscreen effect and color consistency.

[0062] Thickeners are mainly divided into physical thickeners and chemical thickeners. Physical thickeners, such as spherical polymers and silicates, can form a stable suspension system by increasing the size and number of dispersed phase particles; while chemical thickeners, such as acrylic polymers, can charge dispersed phase particles through chemical reactions to avoid coagulation between particles, thereby enhancing the stability of the product. Some thickeners are acidic in nature, so during use, it is necessary to consider the pH value, temperature and other conditions of the system, and neutralize them when necessary to ensure the effect of the thickener. In addition, thickeners also have a great impact on the skin feel of the product, which also needs to be considered comprehensively during use to ensure the skin feel of the product.

[0063] In some embodiments of the present application, two thickeners, acrylic acid or its derivative copolymers (such as acrylic acid (ester) copolymers) and glycerol polyacrylate, are used in combination, wherein the acrylic acid (ester) copolymer is a lightly cross-linked acrylic acid ester copolymer, which is a new type of liquid acrylic rheology modifier, which is compatible with almost most commercially available nonionic, anionic and amphoteric surfactants, and is also compatible with a variety of commonly used additives, and is suitable for a wide range of pH values ​​(3.5 to 10.0). Glycerol polyacrylate is used as a thickener and stabilizer for cosmetic formulations due to its rheological properties, water solubility and hydration ability, and can also be used as a matrix for water-soluble and moisturizing hydrogels, providing excellent moisturizing and nourishing effects for the product.

[0064] In some embodiments, the mass content of the copolymer of acrylic acid or its derivatives in the oil-in-water type sunscreen tinted cream is 0.18% to 0.3%.

[0065] In some embodiments, the weight portion of the copolymer of acrylic acid or its derivatives is 0.18 to 0.3 parts, and the weight portion of glycerol polyacrylate is 0.05 to 0.3 parts.

[0066] The content of the two thickeners in this application may have a certain influence on the stability of the cream. The acrylic acid (ester) copolymer has excellent toner dispersion ability in the water-in-oil system, and a small amount can evenly disperse and suspend the toner. However, as the content increases, the ability to stabilize the toner is enhanced, which will cause the skin feel of the product to become thick and dry.

[0067] In some embodiments, the hydrogenated lecithin and lauroyl lysine coated modified colored powder includes hydrogenated lecithin and lauroyl lysine coated modified titanium dioxide, hydrogenated lecithin and lauroyl lysine coated modified iron oxide yellow powder, hydrogenated lecithin and lauroyl lysine coated modified iron oxide red powder and hydrogenated lecithin and lauroyl lysine coated modified iron oxide black powder in a mass ratio of (0.89-81.2):(4.07-30):(1.72-3):1, which can be optionally (15.25-81.2):(12.75-30):(2.25-7):1.

[0068] Colored creams need to add an appropriate amount of pigments or colorants to give the product a specific color. However, the addition of colorants may affect the stability of the emulsified system. And the color powder system will also affect the sunscreen effect of the product. The combination of coloring powders within the above range of the present application can obtain a more uniform water-in-oil colored cream system, which has a better contouring effect and a better sunscreen effect.

[0069] In some embodiments, the emulsifier includes one or more of a first emulsifier, a second emulsifier, a third emulsifier, and a fourth emulsifier:

[0070] Optionally, the hydrophilic-lipophilic balance value of the first emulsifier is 20 to 30;

[0071] Optionally, the hydrophilic-lipophilic balance value of the second emulsifier is 5 to 15, and the viscosity is 8000 mPa·s to 15000 mPa·s;

[0072] Optionally, the hydrophilic-lipophilic balance value of the third emulsifier is 5 to 15, and the viscosity is 1500 mPa·s to 2500 mPa·s;

[0073] Optionally, the hydrophile-lipophile balance value of the fourth emulsifier is 8-15.

[0074] Emulsifiers are crucial ingredients in oil-in-water systems, responsible for stably combining the oil phase and the water phase. Choosing a suitable emulsifier requires considering its HLB value (hydrophile-lipophile balance), emulsification efficiency, stability and effect on skin feel.

[0075] Optionally, the first emulsifier comprises sodium stearoyl glutamate.

[0076] Optionally, the second emulsifier includes one or more of polyacrylate-13, polysorbate-20 and sorbitan isostearate.

[0077] Optionally, the third emulsifier includes one or more of sodium acrylate / sodium acryloyldimethyl taurate copolymer, polysorbate-80 and sorbitan oleate.

[0078] Optionally, the fourth emulsifier includes one or more of glyceryl stearate and PEG-100 stearate.

[0079] The emulsifier of the present application includes emulsifiers of different properties. Different emulsifiers have different HLB values ​​and / or viscosities and have different compatibilities with different oil phase and water phase components. Multiple combinations make it more suitable for specific oil-water ratios and emulsification conditions, thereby improving the emulsification stability of the product.

[0080] In some embodiments, the sunscreen further comprises one or more of ethylhexyl salicylate, octylcholine, benzophenone, homosalate, ethylhexyl methoxycinnamate, disodium phenyl dibenzimidazole tetrasulphate, butyl methoxydibenzoylmethane and diethylamino hydroxybenzoyl hexyl benzoate.

[0081] Physical sunscreens (such as zinc oxide and titanium dioxide) and chemical sunscreens each have their own advantages and disadvantages. Physical sunscreens have good stability but can easily cause the skin to feel dry and heavy, while chemical sunscreens feel light on the skin but may need to consider light stability. Physical sunscreens and chemical sunscreens have different abilities to increase the sun protection factor, so it is possible to reasonably choose and match sunscreens that can effectively increase the sun protection value while taking into account the skin feel, and sunscreens that can effectively block the sun and are compatible with water-in-oil systems.

[0082] In the present application, the above-mentioned chemical sunscreen is matched with the physical sunscreen, has good stability, will not precipitate due to water-oil stratification, has no obvious reaction with other components in the system, and has a good sunscreen effect.

[0083] In some embodiments, the first auxiliary agent includes one or more of a skin conditioner, an emulsifier, a preservative, and a pH adjuster; and / or; the second auxiliary agent includes one or a combination of an emollient and a dispersant.

[0084] Oil-in-water sunscreen tinted creams need to have a good skin feel, neither too greasy nor too dry, which can be achieved by adjusting the ratio of oil phase to water phase and adding appropriate amounts of emollients and moisturizers. At the same time, the skin feel characteristics of the sunscreen must also be considered to achieve a balance in the overall skin feel.

[0085] In some embodiments, based on 100 parts by weight of the total oil-in-water sunscreen tinted cream, the oil-in-water sunscreen tinted cream includes the following components in parts by weight:

[0086] Water phase components: 60 to 80 parts; including 43 to 45 parts of water, 13 to 15 parts of moisturizer, 3 to 5 parts of thickener, 1 to 2 parts of skin conditioner, 0.5 to 1.5 parts of preservative, and 0.03 to 0.07 parts of pH adjuster;

[0087] Oil phase components: 20 to 40 parts; including 2 to 4 parts of emulsifier, 14 to 16 parts of sunscreen, 0.06 to 0.6 parts of moisturizer, dispersant, and 4 to 6 parts of colorant.

[0088] In some embodiments, the oil-in-water type sunscreen tinted cream satisfies at least one of the following conditions:

[0089] a. Emulsifiers include at least 4 of glyceryl stearate, polyacrylate-13, PEG-100 stearate, sorbitan isostearate, sodium stearoyl glutamate, polysorbate-20, sodium acrylate / sodium acryloyldimethyl taurate copolymer, sorbitan oleate, polysorbate-80, sorbitan sesquiisostearate and polyglyceryl-3 diisostearate;

[0090] b. Moisturizers include one or more of glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, methyl gluceth-20, glycereth-26 and trehalose;

[0091] c. Skin conditioning agents include one or more of acetylated sodium hyaluronate, hydrolyzed sodium hyaluronate, sodium hyaluronate cross-linked polymer, betaine, saccharomyces cerevisiae fermentation product filtrate and bisabolol extract;

[0092] d. preservatives include one or more of phenoxyethanol, p-hydroxyacetophenone, ethylhexylglycerin, 1,2-hexanediol, 1,2-pentanediol, sodium benzoate, sorbic acid, potassium sorbate, sorbitan caprylate and glyceryl caprylate;

[0093] e. pH adjusting agents include one or more of sodium hydroxide, triethanolamine, tromethamine and arginine;

[0094] f. Emollients include one or more of hydrogenated polyisobutene, squalane, isononyl isononanoate, octyldodecanol, cyclopentasiloxane, dimethicone, isohexadecane, caprylyl methicone, caprylic / capric triglyceride and triethylhexanoin;

[0095] g. The dispersant includes one or more of phenyl trimethicone, octyldodecanol, polyglyceryl-2 triisostearate, dimethicone and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone.

[0096] The second aspect of the present application provides a method for preparing an oil-in-water type sunscreen colored cream, comprising:

[0097] Water phase component: placing a thickener, a moisturizing agent and a first auxiliary agent in water, mixing and homogenizing to obtain a water phase component;

[0098] Oil phase component: an emulsifier, a sunscreen, a colorant and a second auxiliary agent are mixed evenly to obtain an oil phase component; the colorant includes a coloring powder modified by encapsulating hydrogenated lecithin and lauroyl lysine; the sunscreen includes an inorganic sunscreen powder modified by encapsulating silica and polydimethylsiloxane;

[0099] The oil phase component and the water phase component are mixed and homogenized to obtain an oil-in-water type sunscreen tinted cream.

[0100] Example

[0101] The following examples more specifically describe the disclosure of the present application, which are intended for illustrative purposes only, as it will be apparent to those skilled in the art that various modifications and variations may be made within the scope of the disclosure of the present application. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are by weight, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further processing, and the instruments used in the examples are commercially available.

[0102] Example 1

[0103] Preparation of an oil-in-water type sunscreen colored cream:

[0104] Provided is a formulation as described in Table 1 below:

[0105] Table 1:

[0106]

[0107]

[0108]

[0109] The preparation method of the oil-in-water type sunscreen colored face cream of this embodiment comprises the following steps:

[0110] Aqueous phase: S01: Add raw materials 1-7 in phase A into beaker 1 in sequence, mix well, and stir until the solution is clear and transparent.

[0111] S02: Add the raw material No. 8 of phase B into the mixed solution obtained in S01, stir evenly, and the solution becomes milky white and transparent.

[0112] S03: Add the raw materials No. 9-12 of phase C into the solution obtained in S02 in sequence.

[0113] S04: Place the mixed solution obtained in S03 in a water bath and heat it to 60-70°C, then homogenize it with a homogenizer for 3 minutes. The speed of the laboratory homogenizer is 5000 rpm to maintain a constant temperature.

[0114] Oil phase part: S05: Put the raw materials No. 13-17 of phase D into beaker 2 in sequence, and heat it to 60-70 degrees until the solid melts and the mixed solution becomes clear.

[0115] S06: Add the raw material No. 18 of phase E into the solution obtained in S05 and stir evenly.

[0116] S07: Mix raw materials No. 19-26 in phase F evenly and grind them three times with a grinder to obtain a uniform color paste.

[0117] S08: Add the color paste obtained in S07 to the solution obtained in S06, raise the temperature to 60-70° C., and homogenize with a homogenizer for 5 minutes. The speed of the laboratory homogenizer is 5000 rpm.

[0118] Mixing: S09: Pour the oil phase solution obtained in S08 into the water phase obtained in S04 (, homogenize with a homogenizer for 5 minutes, the speed of the laboratory homogenizer is 6000 rpm.

[0119] S10: Dissolve the raw materials No. 27 and No. 28 in phase G until they are clear and transparent, add them to the mixed solution obtained in S09, and homogenize them with a homogenizer for 5 minutes at a speed of 7000 rpm to obtain an oil-in-water type sunscreen tinted cream.

[0120] During the emulsification process, parameters such as temperature, stirring speed and time need to be strictly controlled to ensure the uniformity and stability of the emulsified system. Too high temperature or too long stirring time may cause the emulsified system to be destroyed or the sunscreen to become ineffective.

[0121] In order to explore the relationship between the components in the formula of the water-in-oil type sunscreen tinted cream, the present application conducted the following exploratory experiments based on the above-mentioned Example 1.

[0122] Embodiments 2 to 18

[0123] The composition of the water-in-oil type sunscreen tinted cream was adjusted according to Table 1 to prepare the water-in-oil type sunscreen tinted creams of Examples 2 to 18, and the parameters changed are shown in Table 2. The preparation process of the water-in-oil type sunscreen tinted creams of Examples 2 to 18 is the same as that of Example 1.

[0124] Comparative Examples 1 to 10

[0125] The composition of the oil-in-water sunscreen tinted cream was adjusted according to Table 1 to prepare the oil-in-water sunscreen tinted creams of Comparative Examples 1 to 10, and the changed parameters are shown in Table 2. The preparation process of the oil-in-water sunscreen tinted creams of Comparative Examples 1 to 10 is the same as that of Example 1.

[0126] Test Section

[0127] Skin feel test method

[0128] A public opinion survey method was adopted, and 30 female volunteers aged 20-40 were selected to try out various embodiments and comparative examples, and their skin moisturizing, skin adhesion, makeup lastingness and film-forming properties were evaluated, where 5 points were very excellent, 4 points were excellent, 3 points were average, 2 points were poor, and 1 point was very poor; the scoring results were averaged, and the test results are shown in Table 3. The test results of the following evaluation items are also shown in Table 3.

[0129] Stability test

[0130] Weigh equal amounts of the oil-in-water sunscreen tinted cream samples prepared in the examples, place them in a centrifuge, centrifuge at 2000 rpm for 30 min, take them out, and observe the emulsification or stratification of the samples.

[0131] Sunscreen performance test

[0132] The sunscreen performance test uses the UV-2000S cosmetic UV transmittance tester from Labsphere (Lapisphere Optics) in the United States. Its principle is to detect the transmittance of ultraviolet light to sunscreen products, and can quickly measure the transmittance of sunscreen samples in the 250-450nm ultraviolet band. The test method refers to ISO 24443:2021 in vitro sunscreen test method. The samples prepared in each embodiment and comparative example are evenly applied on a PMMA board, and the in vitro SPF value and PA value are tested using Labsphere's UV-2000S. Each formula sample is tested 3 times and the average value is taken.

[0133]

[0134]

[0135]

[0136] As can be seen from the table, the coloring powders double-coated with hydrogenated lecithin and lauroyl lysine used in the embodiments of the present application, and the inorganic sunscreen powders double-coated with silica and polydimethylsiloxane, the resulting creams have high moisturizing properties, are skin-friendly and long-lasting, and have good sunscreen effects. Comparative Examples 1 to 2 are single-layer coated modified coloring powders, which are prone to makeup removal or card lines, and the moisturizing properties are not enough. The coloring powders treated with other treatment agents in Comparative Examples 3 to 7 are not stable in the oil-in-water sunscreen cream of the present application and are not suitable for the present application system. The single-layer coated inorganic sunscreen powders used in Comparative Examples 8 to 9, the sunscreen effect and skin feel of the resulting creams are not as good as those in the embodiments, and stratification occurs after storage at room temperature for 48 hours, indicating that the stability of the system is not good, and the system of Comparative Example 10 is unstable and demulsified. Among them, Example 1 optimizes different types of coloring powders and thickeners, and the resulting cream has better moisturizing properties, skin-friendly properties and long-lasting properties, and also has good sunscreen effects and better comprehensive performance.

[0137] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An oil-in-water type sunscreen colored cream, characterized in that: Based on 100 parts by weight of the total oil-in-water sunscreen tinted cream, the oil-in-water sunscreen tinted cream includes the following components in parts by weight: Water phase components: 60 to 80 parts; including water, thickener, humectant and first auxiliary agent; Oil phase components: 20 to 40 parts; including emulsifier, sunscreen, colorant and second auxiliary agent; the colorant includes hydrogenated lecithin and lauroyl lysine coated modified coloring powder; the sunscreen includes silica and polydimethylsiloxane coated modified inorganic sunscreen powder.

2. The oil-in-water sunscreen colored cream according to claim 1, characterized in that: The thickener includes copolymers of acrylic acid or its derivatives and glycerol polyacrylate.

3. The oil-in-water sunscreen colored cream according to claim 2, characterized in that: The mass content of the copolymer of acrylic acid or its derivatives in the oil-in-water sunscreen tinted cream is 0.18% to 0.3%; optionally, the weight portion of the copolymer of acrylic acid or its derivatives is 0.18 to 0.3 parts, and the weight portion of the glycerol polyacrylate is 0.05 to 0.3 parts.

4. The oil-in-water sunscreen colored cream according to claim 1, characterized in that: The hydrogenated lecithin and lauroyl lysine coated modified colored powder includes hydrogenated lecithin and lauroyl lysine coated modified titanium dioxide, hydrogenated lecithin and lauroyl lysine coated modified iron oxide yellow powder, hydrogenated lecithin and lauroyl lysine coated modified iron oxide red powder and hydrogenated lecithin and lauroyl lysine coated modified iron oxide black powder in a mass ratio of (0.89-81.2):(4.07-30):(1.72-3):1, which can be optionally (15.25-81.2):(12.75-30):(2.25-7):

1.

5. The oil-in-water sunscreen colored cream according to claim 1, characterized in that: The emulsifier includes one or more of a first emulsifier, a second emulsifier, a third emulsifier and a fourth emulsifier: Optionally, the hydrophile-lipophile balance value of the first emulsifier is 20 to 30; Optionally, the hydrophilic-lipophilic balance value of the second emulsifier is 5 to 15, and the viscosity is 8000 mPa·s to 15000 mPa·s; Optionally, the hydrophilic-lipophilic balance value of the third emulsifier is 5 to 15, and the viscosity is 1500 mPa·s to 2500 mPa·s; Optionally, the hydrophile-lipophile balance value of the fourth emulsifier is 8-15.

6. The oil-in-water sunscreen colored cream according to claim 1, characterized in that: The sunscreen also includes one or more of ethylhexyl salicylate, orixerine, benzophenone, homosalate, ethylhexyl methoxycinnamate, disodium phenyl dibenzimidazole tetrasulphate, butyl methoxydibenzoylmethane and diethylaminohydroxybenzoyl hexyl benzoate.

7. The oil-in-water sunscreen colored cream according to claim 1, characterized in that: The first auxiliary agent includes one or more of a skin conditioner, a preservative, an emulsifier and a pH adjuster; and / or the second auxiliary agent includes one or a combination of an emollient and a dispersant.

8. The oil-in-water sunscreen colored cream according to claim 1, characterized in that: Based on 100 parts by weight of the total oil-in-water sunscreen tinted cream, the oil-in-water sunscreen tinted cream includes the following components in parts by weight: Water phase components: 60 to 80 parts; including 43 to 45 parts of water, 13 to 15 parts of moisturizer, 3 to 5 parts of thickener, 1 to 2 parts of skin conditioner, 0.5 to 1.5 parts of preservative, and 0.03 to 0.07 parts of pH adjuster; Oil phase components: 20 to 40 parts; including 2 to 4 parts of emulsifier, 14 to 16 parts of sunscreen, 0.06 to 0.6 parts of moisturizer, dispersant, and 4 to 6 parts of colorant.

9. The oil-in-water sunscreen colored cream according to claim 7, characterized in that: The oil-in-water type sunscreen colored cream meets at least one of the following conditions: a. The emulsifier comprises at least 4 of glyceryl stearate, polyacrylate-13, PEG-100 stearate, sorbitan isostearate, sodium stearoyl glutamate, polysorbate-20, sodium acrylate / sodium acryloyldimethyl taurate copolymer, sorbitan oleate, polysorbate-80, sorbitan sesquiisostearate and polyglyceryl-3 diisostearate; b. The humectant comprises one or more of glycerol, 1,3-butylene glycol, propylene glycol, dipropylene glycol, methyl gluceth-20, glycereth-26 and trehalose; c. The skin conditioning agent comprises one or more of acetylated sodium hyaluronate, hydrolyzed sodium hyaluronate, sodium hyaluronate cross-linked polymer, betaine, saccharomyces cerevisiae fermentation product filtrate and bisabolol extract; d. The preservative comprises one or more of phenoxyethanol, p-hydroxyacetophenone, ethylhexylglycerin, 1,2-hexanediol, 1,2-pentanediol, sodium benzoate, sorbic acid, potassium sorbate, sorbitan caprylate and glyceryl caprylate; e. The pH adjusting agent comprises one or more of sodium hydroxide, triethanolamine, tromethamine and arginine; f. The emollient comprises one or more of hydrogenated polyisobutene, squalane, isononyl isononanoate, octyldodecanol, cyclopentasiloxane, dimethicone, isohexadecane, octyl methicone, caprylic / capric triglyceride and triethylhexanoin; g. The dispersant includes one or more of phenyl trimethicone, octyldodecanol, polyglyceryl-2 triisostearate, dimethicone and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone.

10. A method for preparing an oil-in-water type sunscreen colored cream, characterized in that: include: Water phase component: placing a thickener, a moisturizing agent and a first auxiliary agent in water, mixing and homogenizing to obtain a water phase component; Oil phase component: an emulsifier, a sunscreen, a colorant and a second auxiliary agent are mixed uniformly to obtain an oil phase component; the colorant comprises a color powder modified by encapsulating hydrogenated lecithin and lauroyl lysine; the sunscreen comprises an inorganic sunscreen powder modified by encapsulating silica and polydimethylsiloxane; The oil phase component is mixed with the water phase component, and homogenized and emulsified to obtain an oil-in-water type sunscreen colored cream.

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