High temperature stable emulsified foundation and preparation method thereof

Abstract

The application relates to the field of cosmetics, and particularly discloses a high-temperature stable emulsified foundation cream and a preparation method thereof. The high-temperature stable emulsified foundation cream comprises the following raw materials in percentage by weight: emulsifier A 1-4%, emulsifier B 0.5-1%, oil 10-25%, thickening agent 0.1-3%, film forming agent 0.5-20%, wax forming agent 1-9%, color powder 3.2-25%, emulsion stabilizer 0.5-2%, humectant 2-20%, preservative 0.5-1%, and the balance is solvent; the wax forming agent is selected from at least two of synthetic wax, microcrystalline wax, paraffin wax, beeswax, carnauba wax and candelilla wax. The foundation cream has the advantages of stable cream body in summer, poor migration, good makeup effect, high moisturizing degree and natural delicacy.

Description

Technical Field

[0001] This application relates to the field of cosmetic technology, and more specifically, to a high-temperature stable emulsified foundation cream and its preparation method. Background Technology

[0002] With the booming development of the cosmetics market, color cosmetics have occupied a pivotal position in the cosmetics industry. Base makeup is an important component of color cosmetics, mainly including liquid foundation, BB cream, foundation stick, and foundation cream, which can cover facial blemishes, brighten, and even out skin tone. Solid base makeup is popular among consumers due to its versatile appearance, portability, ease of use, and multiple functions. Traditional solid base makeup mainly includes pure oil-wax systems, pressed powder systems, and solid foundation cream systems. Pure oil-wax systems contain base oils and solid waxes, and are commonly used in lipsticks and base makeup products, offering advantages such as high moisturization and strong shine. Pressed powder systems mainly contain pigments, fillers, and binders, and are usually paired with a powder puff, featuring high coverage and good oil control. Solid foundation creams combine the advantages of both, overcoming the excessive moisturizing and stickiness of pure oil-wax systems and the dryness and tendency to cake in pressed powder systems.

[0003] Currently, most foundation creams on the market are pure oil-based. Pure oil-based foundation creams have a thicker texture, are prone to darkening, and have a noticeable makeup look. When mixed with oily skin, pure oil-based creams can easily cause a powdery and clumpy finish. In the existing technology, Chinese invention patent application number CN2018102876136 discloses an oil-in-water solid foundation cream, which includes the following components by weight percentage: 20-40% liquid oil, 1-8% solid wax, 0.5-5% emulsifier, 5-20% pigment, 1-10% powder filler, 5-15% moisturizer, 1-5% whitening agent, and deionized water to make up to 100%. This oil-in-water solid foundation cream has a high oil content, which, when combined with solid wax, can easily cause closed comedones and acne (especially for acne-prone and sensitive skin). Furthermore, the cream is prone to shifting in summer, leading to patchy makeup on combination skin, and requires skillful application. In response to the aforementioned technologies, the inventors discovered an urgent need for a foundation cream with a light texture that is stable and does not easily shift in summer, and provides long-lasting makeup. Summary of the Invention

[0004] In order to achieve a longer-lasting and sheer makeup look in summer, this application provides a high-temperature stable emulsified foundation cream and its preparation method.

[0005] In a first aspect, this application provides a high-temperature stable emulsified foundation cream, employing the following technical solution: A high-temperature stable emulsified foundation cream comprises the following by weight percentages: emulsifier A 1-4%, emulsifier B 0.5-1%, oil 10-25%, thickener 0.1-3%, film-forming agent 0.5-20%, wax-forming agent 1-9%, colorant 3.2-25%, emulsion stabilizer 0.5-2%, moisturizer 2-20%, preservative 0.5-1%, with the balance being solvent; The wax molding agent is selected from at least two of the following: synthetic wax, microcrystalline wax, paraffin wax, beeswax, carnauba wax, and candelilla wax. The oil is selected from at least one of cyclopentamethoxydimethylsiloxane, trimethylpentaphenyltrisiloxane, octanoic acid / capric triglyceride, octyl polymethylsiloxane, isononyl isononanoate, dioctyl carbonate, and diphenylsiloxyphenyl polytrimethylsiloxane.

[0006] Since pure oil-based foundation creams are mainly composed of various oils, which are fluid, in the high temperatures of summer, the skin surface temperature rises, leading to increased sweating and oil production. This increased oil fluidity causes the foundation cream to migrate from its original application location to other areas, washing away some of its components. This results in uneven makeup, patchiness, and frequent reapplication, failing to meet the requirements for long-lasting makeup. By employing the aforementioned technical solution, using a combination of oils and wax-forming agents, and reducing the oil content, a foundation cream with strong heat resistance is created. The wax-forming agent plays a stabilizing role in the foundation cream, forming a film with a certain degree of hardness and toughness on the skin surface, restricting oil flow. The film-forming agent further forms a uniform and dense thin film on the skin. It possesses excellent adhesion and anti-migration properties, effectively fixing the ingredients in the foundation cream and reducing its migration under high summer temperatures. It also effectively blocks the wash-off of sweat and oil, resulting in a longer-lasting and cleaner makeup look. The emulsifier ensures a uniform mixture of oil and water components, forming a stable emulsion system that enhances the foundation cream's compatibility and adhesion to the skin. Furthermore, it provides better moisturization and spreadability. Combined with humectants, it further enhances the moisturizing effect. The emulsifier also helps the pigments disperse evenly within the system, allowing the foundation cream to better adhere to the skin and cover imperfections. The thickener increases the viscosity of the foundation cream, allowing the pigments to better adhere to the skin surface, forming a more stable coating, extending makeup wear time, increasing coverage, and maintaining a natural and lightweight finish.

[0007] Synthetic waxes and microcrystalline waxes in wax forming agents have high melting points and fine structures, which can significantly improve the high temperature resistance and stability of foundation creams, prevent them from softening at high temperatures, maintain flexibility, avoid cracking, reduce melting and makeup fading problems in summer, enhance film-forming properties, and form a waterproof barrier. In addition, the fine crystal structure of microcrystalline waxes can achieve a silky texture, reduce the grainy feel, improve the spreadability of the cream, and enhance the smoothness. Paraffin wax and natural waxes (beeswax, carnauba wax, and candelilla wax) have moderate high temperature resistance, can lock in oils, and indirectly delay moisture loss.

[0008] The cyclopentamethoxysilane in the oil is volatile and evaporates quickly, forming a thin, breathable film with excellent spreadability and lubricity. This allows the foundation to spread evenly on the skin without clumping or caking, resulting in a smoother, more delicate makeup finish. The film formed by trimethylpentaphenyltrisiloxane has good flexibility and anti-friction properties, preventing the foundation from easily coming off. It also has a certain moisturizing effect, preventing moisture loss and keeping the skin hydrated. The caprylic / capric triglyceride has a delicate texture, making the foundation softer and smoother, and is easily absorbed by the skin. It replenishes the skin's oils, making the skin softer and smoother. The lightweight texture does not burden the skin and forms a uniform oil film on the skin's surface, reducing moisture evaporation and keeping the skin hydrated. It also helps to fix the foundation to some extent, preventing it from caking due to dry skin. To prevent foundation from peeling or fading, octyl polymethylsiloxane spreads quickly on the skin and forms a smooth, long-lasting film, effectively blocking external factors (such as sweat and oil) from eroding the foundation, improving makeup longevity, and locking in skin moisture to keep the skin hydrated, resulting in a smoother and more delicate makeup. Isononyl isononanoate has low viscosity and high spreadability, with good water and oil resistance, effectively preventing the foundation from dissolving or fading due to sweat or sebum secretion, enhancing makeup staying power. Dioctyl carbonate and diphenylsiloxyphenyl polytrimethylsiloxane have a refreshing texture that is quickly absorbed by the skin, providing hydration without leaving a greasy feeling, leaving the skin feeling refreshed and hydrated. This helps improve the moisturizing properties of the foundation, increases its smoothness, makes it easier to apply to the skin, reduces caking and clumping, and makes the makeup more delicate and even.

[0009] Optionally, the foundation cream contains the following ingredients by weight percentage: emulsifier A 3%, emulsifier B 1%, oil 25%, thickener 2%, film-forming agent 5%, wax-forming agent 9%, colorant 20%, emulsion stabilizer 1%, moisturizer 19%, preservative 1%, and the balance being solvent.

[0010] Optionally, the wax forming agent comprises synthetic wax and microcrystalline wax in a mass ratio of 5:2-4.

[0011] By adopting the above technical solution, synthetic wax has a specific molecular structure and physical properties, forming a solid skeleton structure in the foundation cream. Microcrystalline wax has good flexibility and extensibility, which can fill the gaps in the skeleton formed by synthetic wax, making the entire wax molding agent system more compact and stable, better adhering to the skin surface, and tightly binding with the skin, making it less prone to makeup smudging. Moreover, the combination of microcrystalline wax and synthetic wax can adjust the texture of the foundation cream, allowing the foundation cream to be evenly applied to the skin, forming a uniform film, avoiding uneven application. Furthermore, this film has waterproof and sweatproof effects, resisting the erosion of sweat and oil, and prolonging the makeup's staying power.

[0012] Optionally, the oil comprises cyclopentamethoxysiloxane, trimethylpentaphenyltrisiloxane, and caprylic / capric triglycerides in a mass ratio of 10-12:10-14:1-3.

[0013] By employing the above technical solution, cyclopentamethoxysiloxane, with its high volatility, evaporates quickly after application, forming a thin, breathable film on the skin surface. This reduces the migration of foundation due to excessive oil. The film formed by trimethylpentaphenyltrisiloxane is flexible and friction-resistant, resisting daily friction and preventing foundation from falling off. The combined effect of these two enhances the adhesion of the foundation to the skin, effectively prolonging makeup wear time. Caprylic / capric triglycerides form a uniform oil film on the skin, reducing moisture evaporation and keeping the skin hydrated while also preventing external moisture and oil from eroding the foundation. The combination of these three oils allows the foundation to better maintain its integrity and longevity against external factors such as sweat and oil. Moreover, caprylic / capric triglycerides are similar to human sebum, easily absorbed by the skin, deeply moisturizing and leaving the skin smooth and soft. Although cyclopentamethoxysiloxane itself has low moisturizing properties, it can alter the skin's texture, helping other moisturizing ingredients to penetrate better. Penetrating into the skin, trimethylpentaphenyltrisiloxane also possesses moisturizing properties. The combination of these three ingredients provides hydration and moisturization to the skin from different levels. Cyclopentasiloxane has excellent spreadability and lubricity, while trimethylpentaphenyltrisiloxane reduces the viscosity of the foundation, making the application process smoother. Caprylic / capric triglycerides have a delicate texture and can improve the texture of the foundation. The combination of these three ingredients gives the foundation a silky smooth application feel, enhancing the user experience. Moreover, cyclopentasiloxane does not leave a greasy feeling on the skin surface after evaporation, and the film formed by trimethylpentaphenyltrisiloxane is also relatively refreshing. Although caprylic / capric triglycerides can moisturize the skin, their texture is light. This combination of oils makes the skin feel refreshed and comfortable after applying the foundation. These three oils maintain relatively stable performance under different temperature conditions and are not prone to problems such as separation or deterioration due to temperature changes, allowing the foundation to maintain good performance under various environmental conditions.

[0014] Optionally, the color powder includes color powder No. 1, color powder No. 2 and color powder No. 3 in a mass ratio of 15:3:2. Color powder No. 1 includes titanium dioxide, iron oxide red, iron oxide yellow and iron oxide black; color powder No. 2 is a mixture of titanium dioxide, aluminum hydroxide and sodium stearyl glutamic acid; color powder No. 3 is a mixture of titanium dioxide, trimethylsiloxane and aluminum hydroxide.

[0015] By adopting the above technical solution, a mixture of titanium dioxide and iron oxide red, iron oxide yellow, and iron oxide black is used as color powder No. 1, combined with color powder No. 2 and No. 3. The main component of the color powder is titanium dioxide, which can effectively scatter and reflect light, covering skin blemishes such as acne, discoloration, and dark circles. Iron oxide red, yellow, and black can be precisely blended according to different skin tone needs to neutralize the color of blemishes on the skin, making the skin look cleaner and more flawless. Compared with single color powder, blended color powder can comprehensively cover different types of blemishes and improve skin tone evenness, presenting a natural and healthy skin tone, making the skin look smoother and more delicate. Moreover, high-quality titanium dioxide and other color powders have small particle size and good dispersibility. Good dispersibility helps the color powder to better adhere to the skin surface, making the foundation cream smoother when applied.

[0016] Furthermore, the No. 2 pigment utilizes aluminum hydroxide and sodium stearoyl glutamic acid to treat titanium dioxide. Sodium stearoyl glutamic acid, as a lipophilic surface treatment agent, has long-chain alkyl groups in its molecular structure that bind to the surface of titanium dioxide, while the glutamate portion provides a certain degree of hydrophilicity, reducing the surface energy of the pigment, decreasing van der Waals forces between particles, and preventing agglomeration. This allows titanium dioxide to be more evenly dispersed in the oil phase, reducing clumping and precipitation. Aluminum hydroxide, through inorganic coating, forms a dense film on the surface of titanium dioxide, physically isolating particles and further preventing agglomeration. It works synergistically with sodium stearoyl glutamic acid to form an organic-inorganic composite treatment layer, improving dispersion stability, resulting in a uniform, particle-free texture for a more delicate makeup application. It also gives the pigment a certain smoothness, making application smoother and preventing dryness and caking.

[0017] The No. 3 color powder uses trimethylsilyl silicate and aluminum hydroxide to treat titanium dioxide. Trimethylsilyl silicate has a strong hydrophobic modification effect, which can form a hydrophobic layer on the surface of titanium dioxide, making it easier to disperse and reducing van der Waals forces between particles. Aluminum hydroxide, on the other hand, prevents particles from agglomerating through physical coating. Trimethylsilyl silicate forms a breathable hydrophobic film on the skin, which can enhance the powder's high waterproof and sweat-resistant ability and give the color powder a smooth touch, improving its spreadability and smoothness, making it more suitable for summer or oily skin. Aluminum hydroxide can absorb excess oil and help prolong the makeup's staying power.

[0018] Optionally, the mass ratio of titanium dioxide, iron oxide yellow, iron oxide red and iron oxide black in the No. 1 color powder is 11:3:0.8:0.2, and the titanium dioxide in the No. 1 color powder is pretreated with triethoxyoctylsilane and aluminum hydroxide.

[0019] By adopting the above technical solution, the combination of titanium dioxide, iron oxide red, yellow, and black in the above dosage can give the pigment powder a better concealing effect, while also evening out skin tone and making the makeup look more natural and clear; and the dispersibility of titanium dioxide is improved after being treated with triethoxyoctylsilane and aluminum hydroxide, which can make the foundation cream delicate, smooth, soft and natural.

[0020] Optionally, the emulsifier A is selected from at least one of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, lauryl PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, and lauryl PEG-10 tris(trimethylsiloxy)silethyl polymethylsiloxane. The emulsifier B is selected from at least one of polyglycerol-3 diisostearate, polyglycerol-4 isostearate, sorbitan isostearate, sorbitan sesquioleate, etc.

[0021] By adopting the above technical solution, the combination of emulsifier A and emulsifier B can match the oil and water in the foundation cream to form a more stable emulsion, making the foundation cream less prone to oil seepage when stored at high temperatures or for a long time. Moreover, the combination of the two emulsifiers can make the foundation cream less prone to caking, making the cream lighter and achieving a smooth, creamy texture.

[0022] Optionally, emulsifier A is cetyl PEG / PPG-10 / 1 polydimethylsiloxane, and emulsifier B is sorbitan isostearate.

[0023] By adopting the above technical solution, cetyl PEG / PPG-10 / 1 polydimethylsiloxane is a silicone oil-based nonionic emulsifier with a good balance of lipophilic and hydrophilic properties, capable of forming a stable interfacial film between the aqueous and oil phases. Sorbitan isostearate is also a nonionic emulsifier; its hydrophilic and lipophilic groups in its molecular structure can fully interact with both the oil and water phases, enhancing the stability of the emulsion. The combined use of these two emulsions can form a more stable and delicate emulsion system, ensuring uniform mixing of the oil and water phases in the foundation cream, reducing the likelihood of oil-water separation, and guaranteeing the quality stability of the foundation cream during storage and use. Cetyl PEG / PPG-10 / 1 Polydimethylsiloxane possesses excellent lubricity and spreadability, forming a smooth, flexible, and elastic film on the skin surface. This makes foundation application smoother, reduces friction during application, and allows the foundation to better adhere to the skin, preventing issues like makeup slippage and caking. Sorbitan isostearate improves the texture of the foundation, making it more delicate and soft, and adjusts its viscosity and adhesion, resulting in a tighter bond with the skin. Together, these two ingredients create a silkier feel on the skin, leaving it more comfortable and non-greasy after application, enhancing adherence, and making makeup last longer and look more natural.

[0024] Optionally, the thickener is selected from at least one of dimethylsilyl silica and distearate dimethylammonium lithium montmorillonite.

[0025] By adopting the above technical solutions, dimethylsilyl silica has strong hydrophobicity and can form a breathable and waterproof film on the skin surface, reducing the damage of sweat and sebum to makeup. It is especially suitable for combination and oily skin in summer. The smooth surface of silica particles can reduce friction between powders, making the foundation cream lighter and smoother to apply, avoiding a heavy feeling. At the same time, it can also absorb excess oil and maintain a matte makeup effect. Distearate dimethylammonium lithium montmorillonite has excellent thixotropic properties, making wet foundation cream easy to spread. Moreover, the positively charged ammonium groups can weakly bind with the negatively charged skin, enhancing skin adhesion and reducing powderiness.

[0026] Optionally, the film-forming agent is selected from at least one of trimethylsiloxysilicate, polyvinylpyrrolidone, hydrogenated (styrene / methylstyrene / indene) copolymer, polymethylsilsesquioxane, and acrylate / polydimethylsiloxane copolymer.

[0027] By adopting the above technical solutions, trimethylsiloxysilicate has hydrophobicity and breathability, and can form a flexible waterproof film that resists sweat and sebum dissolution, while avoiding the feeling of acne. Polyvinylpyrrolidone combines with the skin or water through hydrogen bonds, enhancing the immediate skin adhesion, reducing powder floating, and improving the problem of powder caking in dry areas.

[0028] Optionally, the preservative is selected from at least one of caprylyl glycol, p-hydroxyacetophenone, ethylhexylglycerin, and 1,2-hexanediol; The moisturizer is selected from at least one of butylene glycol, glycerin, propylene glycol, and dipropylene glycol; The emulsifying stabilizer is selected from at least one of sodium chloride and magnesium sulfate.

[0029] By adopting the above technical solutions, preservatives can increase the antibacterial properties of the foundation cream, and prevent the product from being contaminated by microorganisms during storage and use, thus extending the product's shelf life and ensuring its quality and safety. Using ingredients such as glycerin and butylene glycol as moisturizers can continuously replenish the skin's moisture, increasing the foundation cream's hydration and making the skin softer and smoother. Sodium chloride and magnesium sulfate can regulate the physical properties of the system, keeping the cushion cream in a uniform state, increasing thixotropy, and providing better spreadability and extensibility during application, making the makeup more stable.

[0030] Optionally, the humectant comprises butylene glycol, glycerin, and 1,3-propanediol in a mass ratio of 10:6:3; the preservative comprises caprylyl glycol and ethylhexylglycerin in a preparation example of 0.5:0.5.

[0031] Optionally, the solvent is selected from at least one of deionized water, hot spring water, and Bifida ferment filtrate.

[0032] Secondly, this application provides a method for preparing a high-temperature stable emulsified foundation cream, using the following technical solution: A method for preparing a high-temperature stable emulsified foundation cream includes the following steps: Emulsifier A is mixed with emulsifier B, oil, film-forming agent, and thickener and heated to 80-90℃ to obtain phase A. Wax molding agent is heated to 80-90℃ until it is dissolved evenly to obtain phase B. Color powder is mixed evenly to obtain phase C. Humectant, preservative, emulsion stabilizer and solvent are mixed and heated to 80-90℃ to obtain phase D. After cooling phase A, add it to phase B and stir until homogeneous; add phase C, keep warm at 80-90℃ and stir until homogeneous; add phase D, stir until homogeneous, fill at 80-90℃, cool, and obtain the finished product.

[0033] By adopting the above technical solution, the raw materials in the formula are divided into different phases and added to the system step by step, which helps to promote the interaction between the raw materials and improve the stability of the foundation cream. By controlling the process parameters, the anti-migration property of the foundation cream is effectively improved, achieving the effect of long-lasting makeup and no darkening, and a soft and delicate skin feel. The preparation method of this application is simple in steps, low in cost, suitable for industrial production, and has broad market prospects.

[0034] In summary, this application has the following beneficial effects: 1. Because this application uses a combination of oils such as cyclopentamethoxysiloxane and wax forming agents such as synthetic waxes, the texture and spreadability are optimized in the water-in-oil emulsion system, improving the stability of the foundation cream. Furthermore, the water-in-oil emulsion system can form a stable film between the oil and water phases, prolonging the makeup's longevity. At the same time, the addition of thickeners and film-forming agents gives the foundation cream better skin adhesion and coverage. In summer, when the temperature is high, the wax forming agent enhances the stability of the makeup, reduces temperature-induced migration, and enhances the makeup's staying power in summer.

[0035] 2. In this application, cyclopentasiloxane, trimethylpentaphenyltrisiloxane and caprylic / capric triglyceride are preferably used as oils, along with film-forming agent trimethylsiloxysilicate and thickener dimethylsilyl alkyl silicate, which can form a uniformly distributed flexible film on the skin surface, and can effectively block the invasion of moisture, oil and dirt, making the makeup last longer, while giving the skin a more refreshing and comfortable makeup feel.

[0036] 3. In this application, titanium dioxide, iron oxide yellow, red, black and other pigments are preferred. The pigments are pretreated to improve their dispersibility, increase the smoothness and evenness of the foundation cream, improve the gloss and evenness of the makeup, and make the makeup more harmonious and beautiful. Attached Figure Description

[0037] Figure 1 The image shows the product of the foundation cream prepared in Example 1 after being placed at 50°C for 24 hours.

[0038] Figure 2 The image shows the product of the foundation cream prepared in Example 1 after being placed at 55°C for 24 hours.

[0039] Figure 3 The image shows the product of the foundation cream prepared in Example 1 after being placed at 50°C for 24 hours.

[0040] Figure 4 This is a water resistance test result of the foundation cream prepared in Example 1.

[0041] Figure 5 The image shows a water immersion waterproof test result of the foundation cream prepared in Example 1. Detailed Implementation

[0042] The following embodiments provide a further detailed description of this application. Example

[0043] Example 1: A high-temperature stable emulsified foundation cream, the raw material amounts are shown in Table 1. The oil contains cyclopentamethoxysilane, trimethylpentaphenyltrisiloxane and caprylic / capric triglycerides in a mass ratio of 12:10:3; the wax forming agent includes synthetic wax and microcrystalline wax in a mass ratio of 5:4, the synthetic wax is selected from Paracera, model N88, product number LHMC90; the color powder includes color powder No. 1, color powder No. 2 and color powder No. 3 in a mass ratio of 15:3:2. Pigment No. 1 comprises titanium dioxide, iron oxide yellow, iron oxide red, and iron oxide black in a mass ratio of 11:3:0.8:0.2. The titanium dioxide, iron oxide yellow, iron oxide red, and iron oxide black are all sourced from Shanghai Kofeng Biotechnology, with corresponding model numbers Ti-18as, YP-75AS, RP-29AS, and BP-50AS. Pigment No. 2, also sourced from Shanghai Kofeng Biotechnology, contains titanium dioxide CI77891, aluminum hydroxide, and sodium stearoyl glutamate, with the model number Ti-02SG. Pigment No. 3, also sourced from Shanghai Kofeng Biotechnology, contains titanium dioxide CI77891, trimethylsilyl silicate, and aluminum hydroxide, with the model number Ti-02TMS.

[0044] The preparation method of the above-mentioned high-temperature stable emulsified foundation cream includes the following steps: Emulsifier A is mixed with emulsifier B, oil, film-forming agent and thickener and heated to 80°C to obtain phase A. Wax molding agent is heated to 80°C until it is dissolved evenly to obtain phase B. Color powder is mixed evenly to obtain phase C. Humectant, preservative, emulsion stabilizer and solvent are mixed and heated to 80°C to obtain phase D. After cooling phase A, it is added to phase B and stirred evenly; phase C is added, and the mixture is kept at 80°C and stirred evenly; phase D is added, and the mixture is stirred evenly. After filling at 80°C and cooling, the finished product is obtained.

[0045] Table 1. Raw material dosage of foundation cream in Examples 1-7

[0046] Examples 2-3: A high-temperature stable emulsified foundation cream, which differs from Example 1 in that the amount of raw materials used is shown in Table 1.

[0047] Example 4: A high-temperature stable emulsified foundation cream, which differs from Example 1 in that the raw material amounts are shown in Table 1, and the mass ratio of synthetic wax to microcrystalline wax in the wax forming agent is 5:2.

[0048] Example 5: A high-temperature stable emulsified foundation cream, which differs from Example 1 in that the raw material amounts are shown in Table 1, and the wax forming agent is a synthetic wax.

[0049] Example 6: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the raw material dosages are as shown in Table 1, and the wax molding agent is beeswax.

[0050] Example 7: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the raw material dosages are as shown in Table 1, and the wax molding agent includes synthetic wax and beeswax with a mass ratio of 5:4.

[0051] Example 8: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the raw material dosages are as shown in Table 2, and the oil contains cyclopentasiloxane, trimethylpentaphenyltrisiloxane and glyceryl trioctanoate with a mass ratio of 10:14:1.

[0052] Table 2 Raw material dosages of the foundation cream in Examples 8 - 12

[0053] Example 9: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the oil is cyclopentasiloxane.

[0054] Example 10: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the oil includes trimethylpentaphenyltrisiloxane and glyceryl trioctanoate with a mass ratio of 22:3.

[0055] Example 11: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the oil includes cyclopentasiloxane and glyceryl trioctanoate with a mass ratio of 10:15.

[0056] Example 12: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the emulsifier B is polyglyceryl-3-diisostearate.

[0057] Comparative Examples Comparative Example 1: A high-temperature stable emulsified foundation cream, which is different from Example 1 in that the wax molding agent is only beeswax.

[0058] Comparative Example 2: A commercially available foundation cream, selected from Shenzhen Zhongchuangwei Technology, model MAYCHEER / Meiqier 890 medium skin tone.

[0059] Performance Detection Test Prepare the foundation cream according to the methods in the examples and comparative examples, and conduct performance detection according to the following methods.

[0060] Test 1: Place the foundation cream prepared in Example 1 in an incubator at 50 °C for 24 h, and after taking it out, as Figure 1 shown, there are no cracks, edge locking, melting and other situations in the paste.

[0061] Test 2: The foundation cream prepared in Example 1 was placed in a 55°C incubator for 24 hours. After removal, it showed... Figure 2 As shown, the paste may exhibit issues such as cracking, edge locking, or melting.

[0062] Test 3: The foundation cream prepared in Example 1 was placed in a 55°C incubator for 24 hours. After removal, it showed... Figure 3 As shown, the paste may exhibit issues such as cracking, edge locking, or melting.

[0063] Test 4: Take an appropriate amount of the foundation cream prepared in Example 1, apply it to the arm, leave it for 2 minutes, and then rinse with plenty of water (e.g., Figure 4 As shown in Figure 1), the waterproof effect is good on the area where the foundation was applied on the arm (as shown in Figure 1). Figure 4 As shown in Figure 2), after wiping away the remaining water, the foundation cream remains intact (as shown in Figure 2). Figure 4 (As shown in Figure 3).

[0064] Test 5: Place the cream in water and let it stand for 5 minutes (e.g., Figure 5 (As shown in A), then remove it, and use your fingertip to pick up the material (as shown in A). Figure 5 As shown in Figure B), the material was picked up normally, the application was normal, the spreadability was good, and there was no impact.

[0065] Anti-migration performance: Using a dropper, 0.30g of foundation cream (total amount) was applied to the skin of the human arm and spread evenly. The arm was left to dry naturally for 5 minutes. The arm was then placed in an incubator at 38℃ for 10 minutes. After that, three areas were pressed with paper towels with the same force. The weight increment of the three paper towels (foundation migration amount) was measured using an analytical balance. The migration rate was calculated as migration amount / total amount × 100%. Five skin samples were tested in each group, and the average value of the test results was taken. The test results were recorded in Table 3.

[0066] Skin feel test: Healthy female volunteers aged 20-50 years were selected for the test, divided into 10 groups of 20 people each. They rated the prepared foundation cream. Under the same simple cleansing and skincare routine, different samples were used in an environment with a temperature of 26±1℃ and an air humidity of approximately 75%, at a rate of (1.0±0.1) mg / cm³. 2 The test product was applied to the face, and the user evaluated its spreadability, brightening effect, smoothness, adherence, concealing power, and moisturizing properties using a 10-point scale. 10 points was considered the best experience, 9 points the second best, and 1 point the worst.

[0067] Table 3 Performance test results of high-temperature stable emulsified foundation cream

[0068] Combining the data from Examples 1-3 and Table 3, it can be seen that the foundation cream made with different raw material ratios still has a low migration rate at 38℃, indicating that it has good heat resistance and anti-migration effect, is not easy to smudge in summer, has a good makeup-holding effect in summer, and has a soft skin feel, is easy to spread, adheres well, and has good concealing and brightening effects.

[0069] Compared with Example 1, Example 4 uses synthetic wax and microcrystalline wax with different mass ratios as wax forming agents. It can be seen that Example 4 and Example 1 have similar anti-high temperature migration effects, strong makeup-holding ability in summer, and good skin feel, with concealing, brightening, smoothing and delicacy.

[0070] Compared with Example 1, Example 5 uses synthetic wax, microcrystalline wax and beeswax as wax forming agents. As shown in Table 3, the high-temperature migration rate of the foundation cream prepared in Example 5 is increased, and its spreadability and adherence are reduced, and its makeup holding ability is weakened when used at high temperatures.

[0071] In Example 6, beeswax and microcrystalline wax were used as wax forming agents. It can be seen that the foundation cream made from it has increased migration rate at high temperature, poor makeup holding effect, and its spreadability, adherence and smoothness are not as good as in Example 1.

[0072] In Example 7, synthetic wax and beeswax were used as wax forming agents in a mass ratio of 5:4. As shown in Table 3, the migration rate of the resulting foundation cream was greater than that of Example 1, but smaller than that of Examples 6 and 5. This indicates that the effect of using beeswax and synthetic wax in combination is not as good as the effect of using synthetic wax and microcrystalline wax in combination.

[0073] Compared with Example 1, Example 8 uses cyclopentamethoxysiloxane, trimethylpentaphenyltrisiloxane and caprylic / capric triglyceride in different mass ratios as oils. It can be seen that the prepared foundation cream has similar migration rate and sensory score as Example 1.

[0074] Compared with Example 1, Example 9 uses only cyclopentamethoxysiloxane as an oil, resulting in a foundation cream with increased migration rate and decreased spreadability, moisturizing properties, and adherence.

[0075] In Example 10, trimethylpentaphenyltrisiloxane was used instead of cyclopentadimethylsiloxane. Although it had a better silky feel, brightening effect and concealing power, its moisturizing effect, adherence and spreadability were reduced compared with Example 1.

[0076] Compared with Example 1, Example 11 uses caprylic acid / silicone triglyceride instead of trimethylpentaphenyltrisiloxane, and the resulting foundation cream shows increased migration rate and decreased moisturizing, adherence, and spreadability scores.

[0077] In Example 12, glyceryl-3 diisostearate was used as emulsifier B. It can be seen that its synergistic effect with emulsifier A is not as good as that of sorbitan stearate. The resulting foundation cream has increased migration rate and decreased spreadability, moisturizing properties, and adherence.

[0078] In Comparative Example 1, only one type of beeswax was used as a wax-forming agent. It can be seen that the migration rate of the foundation cream increased at high temperatures, the makeup holding ability weakened, and the sensory evaluation scores such as spreadability decreased.

[0079] Comparative Example 2 is a commercially available foundation cream, which has a higher migration rate at high temperatures and its scores for adherence and moisturization are not as good as those of Example 1 of this application.

[0080] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A high-temperature stable emulsified foundation cream, characterized in that, The raw materials include the following weight percentages: emulsifier A 1-4%, emulsifier B 0.5-1%, oils 10-25%, thickener 0.1-3%, film-forming agent 0.5-20%, wax forming agent 1-9%, colorant 3.2-25%, emulsion stabilizer 0.5-2%, humectant 2-20%, preservative 0.5-1%, with the balance being solvent; The wax molding agent is selected from at least two of the following: synthetic wax, microcrystalline wax, paraffin wax, beeswax, carnauba wax, and candelilla wax. The oil is selected from at least one of cyclopentamethoxydimethylsiloxane, trimethylpentaphenyltrisiloxane, octanoic acid / capric triglyceride, octyl polymethylsiloxane, isononyl isononanoate, dioctyl carbonate, and diphenylsiloxyphenyl polytrimethylsiloxane.

2. The high-temperature stable emulsified foundation cream according to claim 1, characterized in that: The wax forming agent comprises synthetic wax and microcrystalline wax in a mass ratio of 5:2-4.

3. The high-temperature stable emulsified foundation cream according to claim 1, characterized in that: The oil comprises cyclopentamethoxysiloxane, trimethylpentaphenyltrisiloxane, and caprylic / capric triglycerides in a mass ratio of 10-12:10-14:1-3.

4. The high-temperature stable emulsified foundation cream according to claim 1, characterized in that: The color powder includes color powder No. 1, color powder No. 2 and color powder No. 3 in a mass ratio of 15:3:

2. Color powder No. 1 includes titanium dioxide, iron oxide red, iron oxide yellow and iron oxide black; color powder No. 2 is a mixture of titanium dioxide, aluminum hydroxide and sodium stearyl glutamic acid; color powder No. 3 is a mixture of titanium dioxide, trimethylsiloxane and aluminum hydroxide.

5. The high-temperature stable emulsified foundation cream according to claim 4, characterized in that: The mass ratio of titanium dioxide, iron oxide yellow, iron oxide red and iron oxide black in the No. 1 color powder is 11:3:0.8:0.2, and the titanium dioxide in the No. 1 color powder is pretreated with triethoxyoctylsilane and aluminum hydroxide.

6. The high-temperature stable emulsified foundation cream according to claim 1, characterized in that: The emulsifier A is selected from at least one of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, lauryl PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, and lauryl PEG-10 tris(trimethylsiloxy)silethyl polymethylsiloxane. The emulsifier B is selected from at least one of polyglycerol-3 diisostearate, polyglycerol-4 isostearate, sorbitan isostearate, sorbitan sesquioleate, etc.

7. The high-temperature stable emulsified foundation cream according to claim 1, characterized in that: The thickener is selected from at least one of dimethylsilyl alkyl silica and distearate dimethylammonium lithium montmorillonite.

8. The high-temperature stable emulsified foundation cream according to claim 1, characterized in that: The film-forming agent is selected from at least one of trimethylsiloxysilicate, polyvinylpyrrolidone, hydrogenated (styrene / methylstyrene / indene) copolymer, polymethylsilsesquioxane, and acrylate / polydimethylsiloxane copolymer.

9. The high-temperature stable emulsified foundation cream according to claim 1, characterized in that: The preservative is selected from at least one of caprylyl glycol, p-hydroxyacetophenone, ethylhexylglycerin, and 1,2-hexanediol; The moisturizer is selected from at least one of butylene glycol, glycerin, propylene glycol, and dipropylene glycol; The emulsifying stabilizer is selected from at least one of sodium chloride and magnesium sulfate.

10. A method for preparing the high-temperature stable emulsified foundation cream according to any one of claims 1-9, characterized in that: Includes the following steps: Emulsifier A is mixed with emulsifier B, oil, film-forming agent, and thickener and heated to 80-90℃ to obtain phase A. Wax molding agent is heated to 80-90℃ until it is dissolved evenly to obtain phase B. Color powder is mixed evenly to obtain phase C. Humectant, preservative, emulsion stabilizer and solvent are mixed and heated to 80-90℃ to obtain phase D. After cooling phase A, add it to phase B and stir until homogeneous; add phase C, keep warm at 80-90℃ and stir until homogeneous; add phase D, stir until homogeneous, fill at 80-90℃, cool, and obtain the finished product.

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