A water-in-oil type cream and a preparation process thereof

Abstract

This application relates to the field of cosmetic technology, specifically disclosing an oil-in-water face cream and its preparation process. An oil-in-water face cream includes an oil phase and an aqueous phase. The oil phase includes cyclopentamethoxysiloxane, octyl polymethylsiloxane, PEG-10 polymethylsiloxane, lauryl PEG-9 polymethylsiloxane ethyl polymethylsiloxane, etc., while the aqueous phase includes butylene glycol, rhamnose, sodium chloride, skin conditioning agents, and aqueous emollients. In preparing the oil-in-water face cream, the skin conditioning agents and aqueous emollients are pre-mixed, and the pH value is adjusted to 5-6. The preparation process of the oil-in-water face cream involves mixing the oil phase and aqueous phase in a specific order, and then adding different aqueous raw materials to the oil phase in a specific order to obtain the oil-in-water face cream. The oil-in-water face cream of this application can maintain a good cream state even after being placed in low-temperature or high-temperature environments for a long time.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and in particular to an oil-in-water face cream and its preparation process. Background Technology

[0002] Cosmetics refer to chemical industrial products or fine chemical products that are applied to any part of the human body surface, such as skin, hair, nails, lips, and teeth, by means of smearing, spraying, or other similar methods, to achieve the purpose of cleansing, maintaining, beautifying, modifying and altering appearance, or correcting body odor and maintaining a good condition. With the improvement of living standards, more and more people are using cosmetics in their daily facial skin care, hoping to achieve effects such as moisturizing, whitening, and anti-aging.

[0003] Emulsified cosmetics are a common type of facial care product, divided into two main categories: water-in-oil and oil-in-water. Generally speaking, water-in-oil cosmetics are more widely used because they are more stable than oil-in-water cosmetics. However, with the development of the times, consumers have placed higher demands on the efficacy of cosmetics. Some consumers require cosmetics with higher moisturizing and hydrating properties. Since oil-in-water cosmetics offer significantly better moisturizing and hydrating effects than water-in-oil cosmetics, they are highly favored by these consumers.

[0004] However, the stability of water-in-oil e-coated cosmetic systems is difficult to control, mainly due to their susceptibility to temperature changes and poor cold and heat resistance. Consumers often report significant oil-water separation after prolonged exposure to high or low temperatures, severely impacting the user experience. Furthermore, compromised system stability can affect product quality and efficacy, and even lead to bacterial growth, increasing the risk of contamination. Therefore, it is necessary to further improve the system stability of water-in-oil e-coated cosmetics. Summary of the Invention

[0005] To further improve the system stability of water-in-oil cosmetics, this application provides a water-in-oil face cream and its preparation process. By selecting specific base oils and emulsifiers in the oil phase preparation, combined with a special aqueous phase, pH adjustment method, and preparation process, this application not only ensures the full hydration of both the oil and aqueous phases, improving the system stability of the face cream, but also promotes more uniform dispersion of the functional components in the cream within the system, resulting in a more even and effective skincare effect. This water-in-oil face cream can maintain a good creamy state even after prolonged exposure to low or high temperatures.

[0006] Firstly, the oil-in-water type face cream provided in this application adopts the following technical solution: A water-in-oil face cream, comprising the following raw materials by weight percentage: Phase A: 10%–15% cyclopentamethoxysiloxane, 4.6%–6.5% oil phase thickener A; Phase B: 4.9%–6.8% oil phase emollient A, 2%–3% filler A, 1%–3% PEG-10 polydimethylsiloxane, 1%–2% lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane; Phase C: 5%–10% octyl polymethylsiloxane, 3.2%–4.8% filler B; Phase D: 3.5%–6.5% oil phase thickener B; Phase E: 5%–10% butylene glycol, 0.1%–0.2% rhamnose, 0.5%–1% sodium chloride, 0.1%–0.5% antioxidant, 2.5%–5% humectant; Phase F: 4.902%–10.81% skin conditioning agent; Phase G: 0.4%–0.8% aqueous emollient; Phase H: 0.01%–0.1% pH adjuster; Phase J: 0.1%–0.2% fragrance, 0.05%–0.1% oil phase emollient B; K phase: 30%–35% water; In preparing the water-in-oil face cream, the F phase, G phase, H phase and water accounting for 5% to 10% of the total mass of the K phase water are premixed and the pH value is adjusted to 5 to 6.

[0007] In the above technical solution, this application selects cyclopentamethoxysiloxane and octylpolymethylsiloxane as base oils, PEG-10 polydimethylsiloxane and lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane as emulsifiers, and adds butanediol and rhamnose to the aqueous phase, while simultaneously adding sodium chloride as an aqueous phase density regulator and free water ratio control agent. After sodium chloride is fully hydrated with water, the proportion of free water is reduced, increasing the stability of the aqueous phase. The above raw materials work synergistically in the preparation of the water-in-oil face cream, and in conjunction with the preparation process of this application, significantly improve the stability of the water-in-oil face cream, especially its cold and heat resistance. The applicant's specific analysis suggests that adding sodium chloride to the aqueous phase effectively regulates its consistency, allowing it to better cooperate with the emulsifier to achieve a more complete water-in-oil emulsion reaction. The addition of butylene glycol and rhamnose further lowers the freezing point of the aqueous phase. Research shows that adding 0.1%–0.2% rhamnose to the water-in-oil cream significantly reduces the freezing point; it remains unfrozen even after 30 days at -18°C. This demonstrates that the amount of rhamnose added is crucial for lowering the freezing point of the water-in-oil cream. Cyclopentasiloxane and octyl polymethylsiloxane, as base oils, effectively inhibit high temperatures, such as ester deterioration at 45°C. They also exhibit good synergistic effects with the emulsifier. Combined with the aqueous phase, they form a stable emulsion system, effectively stabilizing the viscosity of the water-in-oil cream at different temperatures and preventing water-oil separation at high temperatures.

[0008] Meanwhile, this application achieves precise pH control of the face cream by pre-mixing the F phase, G phase, H phase, and 5%–10% of the total mass of the K phase water and adjusting the pH to 5–6. This further stabilizes the stability of the active ingredients in the water-in-oil face cream, preventing excessive interactions between the active ingredients after adding excessive pH adjusters. It also effectively solves the irritation problem caused by the combination of multiple active ingredients. Therefore, this application creatively improves the stability of the water-in-oil face cream by pre-adjusting the pH of the active ingredients, reducing the loss of active ingredients during preparation, enhancing the skincare efficacy, and significantly reducing irritation. This provides consumers with a better skincare experience and expands the user base of water-in-oil face creams, making them suitable even for sensitive skin.

[0009] Preferably, the skin conditioning agent comprises at least composition a, composition b, and composition c; and by weight percentage of an oil-in-water cream, it comprises 0.4% to 0.8% composition a, 1.5% to 2.5% composition b, and 1% to 2% composition c. Wherein, composition a is a compound of hydroxypropyl cyclodextrin and plum blossom extract in a mass ratio of (90-92):(8-10); The composition b is composed of 2 wt% to 3 wt% Leuconostoc mellitus / radish root fermentation product filtrate, 0.2 wt% to 0.3 wt% red bean seed extract and solvent; The composition c consists of 1 wt% to 2 wt% plankton extract and solvent.

[0010] In the aforementioned technical solutions, plum blossom extract exhibits significant antioxidant effects, effectively scavenging free radicals in the body and delaying skin aging. Leuconostoc / radish root fermentation product filtrate is rich in various amino acids and trace elements, providing ample nutrition to the skin and promoting skin metabolism. Red bean seed extract is rich in vitamins and minerals, helping to improve dull skin and brighten the complexion. Plankton extract is rich in various bioactive substances, enhancing skin immunity and resisting external environmental damage.

[0011] This application significantly enhances the moisturizing effect of a water-in-oil face cream by adding plum blossom extract, Leuconostoc mellitus / radish root fermentation product filtrate, red bean seed extract, and plankton extract. It also significantly strengthens the cream's antioxidant and anti-aging functions. Furthermore, the synergistic effect of these three ingredients further improves the skin's resistance to pollution, particularly enhancing its resistance to particulate matter and volatile organic compounds in smog. This reduces skin problems such as dullness and aging caused by air pollution, significantly improving skin smoothness and radiance through both protection and nourishment.

[0012] Preferably, the skin conditioning agent further includes composition d, composition e, and composition f; based on the mass percentage of an oil-in-water face cream, it includes 0.5% to 1% composition d, 0.001% to 0.005% composition e, and 0.001% to 0.005% composition f; wherein, composition d is composed of 0.05wt% to 0.1wt% acetyl tetrapeptide-2 and a solvent; The composition e is composed of 6 wt% to 8 wt% of chrysanthemum extract and a solvent; The composition f is composed of 1.7 wt% to 2 wt% hop extract and solvent.

[0013] In the aforementioned technical solutions, acetyl tetrapeptide-2 can inhibit the activity of matrix metalloproteinases, thereby protecting collagen in the skin, reducing collagen loss, and delaying skin aging. Globe amaranth extract is rich in various active ingredients, which can significantly improve skin laxity and wrinkles. Hops extract contains abundant flavonoids, which have antioxidant and anti-inflammatory properties, improving skin inflammation and enhancing skin immunity.

[0014] This application enhances the anti-aging and antioxidant effects of water-in-oil creams by adding acetyl tetrapeptide-2, chamomile extract, and hops extract. Furthermore, the synergistic effect of these three ingredients further enhances the skin's absorption of active ingredients and stimulates dermal activity, resulting in better immediate and long-lasting anti-wrinkle effects, providing consumers with a gentler and more effective skincare experience.

[0015] Preferably, based on the mass percentage of the oil-in-water face cream, the filler B comprises 0.8% to 1.2% vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer, 0.8% to 1.2% boron nitride, 0.8% to 1.2% methyl methacrylate crosspolymer, and 0.8% to 1.2% silica.

[0016] In the above technical solution, the vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer has excellent extensibility, which can significantly improve the creamy texture of the oil-in-water cream; boron nitride can significantly improve the oil absorption of the oil-in-water cream and effectively control facial oil secretion; methyl methacrylate cross-linked polymer can enhance the viscosity and stability of the oil-in-water cream and improve the smoothness and evenness when applying the cream; silica can provide the oil-in-water cream with better smoothness and support.

[0017] This application utilizes a combination of vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosspolymer, boron nitride, methyl methacrylate crosspolymer, and silica in an oil-in-water face cream. The interaction of these four components significantly enhances the cream's soft-focus effect, supple feel, and dryness on the skin. Furthermore, this interaction promotes the integration of sebum secreted by the skin's surface with the oil-in-water face cream, thereby enhancing the skin's absorption of the active ingredients.

[0018] Preferably, based on the mass percentage of the oil-in-water face cream, the oil phase thickener A comprises 4%–5% polydimethylsiloxane, 0.5%–1% distearate dimethylammonium lithium montmorillonite, and 0.1%–0.5% triethyl citrate, and the oil phase thickener B comprises 1.5%–2.5% trimethylammonium chloride, 1%–2% synthetic wax, and 1%–2% white beeswax.

[0019] In the above technical solution, this application adds oil phase thickener A and oil phase thickener B to the water-in-oil cream. The two can work well with the base oil and emulsifier to further adjust the viscosity of the water-in-oil cream and further maintain the high temperature stability of the water-in-oil cream.

[0020] Preferably, the oil phase emollient A comprises 4% to 5% polydimethylsiloxane, 0.5% to 1% polydimethylsiloxane crosspolymer, and 0.4% to 0.8% triglyceride (ethylhexanoate), based on the mass percentage of the oil-in-water face cream.

[0021] In the above technical solution, this application adds polydimethylsiloxane, polydimethylsiloxane crosspolymer, and triglyceride (ethylhexanoate) as oil-phase emollient A, which can be well integrated with the basic oil components in the water-in-oil cream, further improving the stability and moisturizing ability of the water-in-oil cream. At the same time, polydimethylsiloxane, polydimethylsiloxane crosspolymer, and triglyceride (ethylhexanoate) can further promote the integration of the water-in-oil cream and the skin's surface lipid film, further enhancing the skin's absorption of the functional ingredients in the water-in-oil cream.

[0022] Preferably, the oil-phase emollient B is composed of 99.5 wt% to 99.6 wt% wild soybean oil, 0.1 wt% to 0.3 wt% carrot root extract, 0.1 wt% to 0.3 wt% β-carotene and 0.05 wt% to 0.1 wt% vitamin E.

[0023] In the aforementioned technical solution, wild soybean oil has significant antioxidant properties, capable of scavenging free radicals in the body and delaying skin aging. Carrot root extract is rich in various active ingredients, which can improve dull skin and brighten skin tone. Furthermore, the addition of β-carotene and vitamin E further enhances the antioxidant effect of the cream, providing consumers with a more efficient skincare experience.

[0024] Secondly, this application provides a preparation process for an oil-in-water type face cream using the following technical solution: A process for preparing an oil-in-water face cream includes the following steps: Step 1, Pre-treatment of raw materials: Step 1-1: Mix phase A raw materials until there are no particles or clumps. Add phase B raw materials and stir evenly. Then add phase C raw materials and stir evenly. Add phase D raw materials and heat to 91-95℃ while stirring. Keep the temperature for 10-12 minutes. After the holding time is completed, homogenize to obtain phase A / B / C / D material. Keep the material at the temperature for later use. Steps 1-2: Mix the E-phase raw material with 90% to 95% by mass of the K-phase raw material, and heat to 84 to 87°C while stirring. Stir until homogeneous to obtain the E-phase liquid, and keep it warm for later use. Steps 1-3: Mix and stir the F phase raw materials evenly, then add the G phase raw materials while stirring, stir evenly, then add the H phase raw materials and the remaining K phase raw materials, continue to stir evenly, and adjust the pH value of the mixture to 5-6 to obtain the F / G / H phase solution, and keep it warm for later use; Step 2: At 85-92℃, add the E phase liquid to the A / B / C / D phase liquid, stir evenly, and then vacuum degas; then add the F / G / H phase liquid and stir evenly. Step 3: When the temperature drops to 58-60℃, add the J phase raw material, stir evenly, and then vacuum degas to obtain an oil-in-water face cream.

[0025] In contrast to most oil-in-water preparation processes that involve separately mixing the oil phase and the water phase until homogeneous, followed by emulsification and dispersion, this application adds the oil phase raw materials in batches during the mixing process, gradually mixing them until homogeneous. Furthermore, by pre-adjusting the pH of the skin conditioning agents and other raw materials in the water phase to 5-6, the active ingredients in the oil-in-water cream are fully protected, allowing them to fully exhibit their functional properties. This enables the oil-in-water cream to better exert its skincare effects and promotes the absorption of these active ingredients by the skin. Simultaneously, this preparation process ensures thorough emulsification of the oil-in-water cream, improving its stability.

[0026] Preferably, steps 1-3 are as follows: Step a: Mix and stir the F phase raw material evenly, then add the G phase raw material while stirring, and stir evenly to obtain the F / G phase solution; Step b: After thoroughly mixing the remaining K-phase raw materials and H-phase raw materials, an H-phase liquid is obtained; Step c: Add 80% to 90% by mass of H phase solution to F / G phase solution, stir evenly to obtain F / G / H phase solution; Step d: Detect the pH value of the F / G / H phase solution. When the pH value is between 5 and 6, stop adding the remaining H phase solution. When the pH value is less than 5, continue adding the remaining H phase solution and adjust the pH value of the F / G / H phase solution to between 5 and 6. When the pH value is greater than 6, stop the preparation process of the F / G / H phase solution.

[0027] In the above technical solution, this application places the precise pH adjustment of the face cream in steps 1-3, which not only achieves a more precise control of the face cream's pH value, but also more accurately and completely neutralizes the components that need to be neutralized in the F / G / H phase solution, effectively solving the irritation problem after the compounding of multiple active ingredients. In conventional processes, the pH value of the product is usually adjusted in the last step. Although this can adjust the pH value of the product to the final required value, it also increases the amount of pH adjuster used, causing the active ingredients in the formula that do not need pH adjustment to undergo acid-base neutralization reactions, thus affecting their own efficacy characteristics and ultimately exhibiting strong irritation.

[0028] Preferably, step 2 is as follows: At 85–92℃, the E-phase liquid is added to the A / B / C / D phase mixture, and stirring and homogenization are started simultaneously at a stirring speed of 35–45 Hz and a homogenization speed of 48–50 Hz. After the E-phase liquid is added, homogenization is continued at a homogenization speed of 48–50 Hz for 5–6 min. Then, vacuum degassing is performed at a pressure of -0.01–-0.05 MPa with a stirring speed of 20–35 Hz. Next, the F / G / H phase liquid is added, and stirring and homogenization are started simultaneously at a stirring speed of 35–45 Hz and a homogenization speed of 48–50 Hz for 5–6 min. Then, vacuum degassing is performed at a pressure of -0.01–-0.05 MPa with a stirring speed of 20–35 Hz.

[0029] In the above technical solution, this application strictly controls various factors such as the order of addition, stirring speed, homogenization speed and time when mixing the oil phase and water phase, especially strictly controlling the homogenization time after the E phase liquid is added and the homogenization time after adding the F / G / H phase liquid. This ensures that the raw materials of the oil-in-water cream are fully and evenly mixed, while also effectively controlling the fineness and consistency of the cream, further enhancing the cream's dense, delicate and soft texture.

[0030] Preferably, a preparation process for an oil-in-water face cream includes the following steps: Step 1, Pre-treatment of raw materials: Step 1-1, Preparation of A / B / C / D phase materials: Step a: Mix the A phase raw materials and disperse them until there are no particles or clumps; Step b: Add phase B raw material and stir evenly at a stirring speed of 20-35 Hz; Step c: Add the C phase raw material and stir evenly at a stirring speed of 20-35 Hz; Step d: Add the D phase raw material, and heat it to 91-95℃ while stirring at a stirring speed of 20-35Hz, and then keep it at that temperature for 10-12 minutes; Step e: After the heat preservation is completed, stir and homogenize at a stirring speed of 20-35Hz and a homogenization speed of 30-45Hz for 2-3 minutes. After confirming that the material is uniform and free of particles, the A / B / C / D phase material is obtained and kept warm for later use. Steps 1-2, Preparation of E-phase feed solution: Mix the E-phase raw material with 90%–95% by mass of the K-phase raw material, and heat the mixture to 84–87°C while stirring at a speed of 20–50 Hz until homogeneous to obtain the E-phase liquid, and keep it warm for later use. Steps 1-3, Preparation of F / G / H phase feed solution: Step a: Mix and stir the F phase raw material evenly, then add the G phase raw material at a stirring speed of 20-35 Hz, and stir evenly to obtain the F / G phase solution; Step b: Stir the remaining K-phase raw material and H-phase raw material evenly at a stirring speed of 20-35 Hz to obtain H-phase liquid; Step c: Add 80% to 90% by mass of H phase solution to F / G phase solution, and stir evenly at a stirring speed of 20 to 35 Hz to obtain F / G / H phase solution; Step d: Detect the pH value of the F / G / H phase solution. When the pH value is between 5 and 6, stop adding the remaining H phase solution. When the pH value is less than 5, continue adding the remaining H phase solution and adjust the pH value of the F / G / H phase solution to between 5 and 6. When the pH value is greater than 6, stop the preparation process of the F / G / H phase solution. Step 2: At 85–92℃, add the E-phase liquid to the A / B / C / D phase mixture, and simultaneously start stirring and homogenizing at a stirring speed of 35–45 Hz and a homogenization speed of 48–50 Hz. After the E-phase liquid is added, continue homogenizing at a homogenization speed of 48–50 Hz for 5–6 minutes, and then vacuum degas at a pressure of -0.01–-0.05 MPa with a stirring speed of 20–35 Hz. Next, add the F / G / H phase liquid and simultaneously start stirring and homogenizing at a stirring speed of 35–45 Hz and a homogenization speed of 48–50 Hz for 5–6 minutes, and then vacuum degas at a pressure of -0.01–-0.05 MPa with a stirring speed of 20–35 Hz. Step 3: While stirring at a speed of 20-35 Hz, cool down until the temperature drops to 58-60 ℃. Then add the J phase raw material sequentially and stir at a speed of 20-35 Hz for 5-6 minutes. Finally, while stirring at a speed of 20-35 Hz, vacuum degas at a pressure of -0.01 to -0.05 MPa to obtain an oil-in-water face cream.

[0031] In summary, this application includes at least one of the following beneficial technical effects: 1. This application selects special base oils and emulsifiers, and adds rhamnose to the aqueous phase, combined with the preparation process of this application, to promote the full emulsification of the water-in-oil cream, significantly reduce the freezing point of the water-in-oil cream, effectively stabilize the viscosity of the water-in-oil cream at different temperatures, and significantly improve the stability of the water-in-oil cream, especially its cold resistance and heat resistance.

[0032] 2. This application, by pre-mixing the F phase, G phase, H phase and water accounting for 5% to 10% of the total mass of the K phase water and adjusting the pH to 5 to 6, not only further stabilizes the stability of the functional ingredients in the oil-in-water cream, but also effectively solves the irritation problem after multiple functional ingredients are combined, significantly reducing the irritation of the oil-in-water cream and providing consumers with a better skin care experience.

[0033] 3. This application, by adding plum blossom extract, Leuconostoc mellitus / radish root ferment filtrate, red bean seed extract and plankton extract to an oil-in-water face cream, not only achieves better skin nourishment but also significantly enhances the skin's anti-pollution ability, especially strengthening the skin's resistance to particulate matter and volatile organic compounds in smog. From both protection and nourishment perspectives, it significantly improves the skin's smoothness and radiance. Detailed Implementation

[0034] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0035] Throughout this specification, unless otherwise specified, the terminology used herein should be understood as having the meaning commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the event of any conflict, this specification shall prevail.

[0036] Example 1 A water-in-oil face cream comprising phases A, B, C, D, E, F, G, H, J, and K.

[0037] Phase A consists of cyclopentadimethylsiloxane and oil phase thickener A.

[0038] Among them, the oil phase thickener A is composed of polydimethylsiloxane, distearate dimethylammonium lithium montmorillonite, and triethyl citrate.

[0039] Phase B consists of oil-phase emollient A, filler A, PEG-10 polydimethylsiloxane, and lauryl PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane.

[0040] Among them, the oil phase emollient A is composed of polydimethylsiloxane, polydimethylsiloxane crosspolymer and triglyceride (ethylhexanoate).

[0041] Filler A is trimethylsiloxysilicate.

[0042] Phase C is composed of octyl polymethylsiloxane and filler B.

[0043] Filler B is composed of vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer, boron nitride, methyl methacrylate cross-linked polymer, and silica.

[0044] In this context, phase D is oil phase thickener B.

[0045] Among them, the oil phase thickener B is composed of sanshanyu extract, synthetic wax and white beeswax.

[0046] Phase E is composed of butylene glycol, rhamnose, sodium chloride, antioxidants, and humectants.

[0047] The humectant is composed of 1,2-hexanediol and glycerin.

[0048] Among them, the antioxidant is p-hydroxyacetophenone.

[0049] Among them, phase F is a skin conditioning agent.

[0050] The skin conditioning agent is composed of composition a, composition b, composition c, composition g, composition h, and composition m.

[0051] Composition a is composed of hydroxypropyl cyclodextrin and plum blossom extract in a mass ratio of 90:10.

[0052] Composition b consists of 97.675 kg of water, 0.025 kg of citric acid, 2 kg of Leuconostoc mellitus / radish root fermentation product filtrate, and 0.3 kg of red bean seed extract.

[0053] Composition c consists of 68 kg of water, 31 kg of butylene glycol, and 1 kg of planktonic extract*.

[0054] The composition g consists of 69.05 kg water, 30 kg glycerol, 0.5 kg hydrolyzed corn gluten, 0.3 kg sodium benzoate and 0.15 kg potassium sorbate.

[0055] The composition h consists of 69 kg of water, 30 kg of glycerol, 0.5 kg of hydrolyzed rice protein, and 0.5 kg of sodium benzoate.

[0056] The composition m consists of 37.5 kg betaine, 34.5 kg sucrose, 21 kg water, 4.2 kg potassium lactate, 2 kg lactic acid, and 0.8 kg hydrolyzed red algae extract.

[0057] In this phase, G is an aqueous emollient.

[0058] The aqueous emollient is composed of 47.5 kg of 1,2-pentanediol, 47.4 kg of butylene glycol, 5 kg of hydroxyphenylpropionamide benzoic acid, and 0.1 kg of ascorbyl palmitate.

[0059] In this phase, H is a pH adjuster.

[0060] Arginine is the pH adjuster.

[0061] Phase J consists of fragrance and oil-based emollient B.

[0062] Among them, the oil phase emollient B is composed of 99.6 kg of wild soybean oil, 0.1 kg of carrot root extract, 0.2 kg of β-carotene and 0.1 g of vitamin E.

[0063] In this context, phase K is water.

[0064] The specific amounts of each raw material are shown in Table 1.

[0065] The preparation process of water-in-oil face cream includes the following steps: Step 1, Pre-treatment of raw materials: Step 1-1, Preparation of A / B / C / D phase materials: Step a: Mix the A phase raw materials and disperse them until there are no particles or clumps.

[0066] Step b: Add phase B raw material and stir evenly at a stirring speed of 20 Hz.

[0067] Step c: Add the C phase raw material and stir evenly at a stirring speed of 20 Hz.

[0068] Step d: Add the D phase raw material, and heat it to 91°C while stirring at a speed of 20 Hz, then keep it at that temperature for 12 minutes.

[0069] Step e: After the heat preservation is completed, stir and homogenize at a stirring speed of 20Hz and a homogenization speed of 30Hz for 3 minutes. After confirming that the material is uniform and free of particles, the A / B / C / D phase material is obtained and kept warm for later use.

[0070] Steps 1-2, Preparation of E-phase feed solution: The E-phase raw material and 90% by mass of the K-phase raw material are mixed and heated to 84°C while stirring at a speed of 20 Hz. The mixture is stirred until homogeneous to obtain the E-phase liquid, which is then kept warm for later use.

[0071] Steps 1-3, Preparation of F / G / H phase feed solution: Step a: Mix and stir the F phase raw material evenly, then add the G phase raw material at a stirring speed of 20 Hz, and stir evenly to obtain the F / G phase solution.

[0072] Step b: Stir the remaining K-phase raw materials and H-phase raw materials evenly at a stirring speed of 20-35 Hz to obtain H-phase liquid.

[0073] Step c: Add 80% by mass of H phase solution to F / G phase solution, and stir evenly at 20 Hz to obtain F / G / H phase solution.

[0074] Step d: Detect the pH value of the F / G / H phase solution. When the pH value is between 5 and 6, stop adding the remaining H phase solution. When the pH value is less than 5, continue adding the remaining H phase solution and adjust the pH value of the F / G / H phase solution to between 5 and 6. When the pH value is greater than 6, stop the preparation process of the F / G / H phase solution.

[0075] Step 2: At 85℃, add the E phase liquid to the A / B / C / D phase liquid, and simultaneously start stirring and homogenizing at a stirring speed of 35Hz and a homogenizing speed of 48Hz. After the E phase liquid is added, continue homogenizing at a homogenizing speed of 48Hz for 5 minutes, and then vacuum degas at a pressure of -0.01MPa with a stirring speed of 20Hz. Next, add the F / G / H phase liquid and simultaneously start stirring and homogenizing at a stirring speed of 35Hz and a homogenizing speed of 48Hz for 6 minutes, and then vacuum degas at a pressure of -0.01MPa with a stirring speed of 20Hz. Step 3: While stirring at a speed of 20 Hz, cool down. When the temperature drops to 58 ℃, add the J phase raw materials in sequence. Stir at a speed of 20 Hz for 6 minutes, then vacuum degas at a pressure of -0.01 MPa while stirring at a speed of 20 Hz to obtain an oil-in-water face cream.

[0076] Example 2 An oil-in-water face cream, which differs from Example 1, Composition a is composed of hydroxypropyl cyclodextrin and plum blossom extract in a mass ratio of 91:9.

[0077] Composition b consists of 96.73 kg water, 0.25 kg citric acid, 3 kg Leuconostoc mellitus / radish root fermentation product filtrate, and 0.25 kg red bean seed extract.

[0078] Composition c consists of 69 kg of water, 29 kg of butylene glycol, and 2 kg of planktonic extract*.

[0079] Oil-phase emollient B is composed of 99.5 kg of wild soybean oil, 0.3 kg of carrot root extract, 0.15 kg of β-carotene, and 0.05 g of vitamin E.

[0080] The usage of each raw material is shown in Table 1.

[0081] The preparation process of water-in-oil face cream includes the following steps: Step 1, Pre-treatment of raw materials: Step 1-1, Preparation of A / B / C / D phase materials: Step a: Mix the A phase raw materials and disperse them until there are no particles or clumps.

[0082] Step b: Add phase B raw material and stir evenly at a stirring speed of 35 Hz.

[0083] Step c: Add the C phase raw material and stir evenly at a stirring speed of 35 Hz.

[0084] Step d: Add the D phase raw material, and heat it to 95°C while stirring at a speed of 35 Hz, then keep it at that temperature for 10 minutes.

[0085] Step e: After the heat preservation is completed, stir and homogenize at a stirring speed of 35Hz and a homogenization speed of 45Hz for 2 minutes. After confirming that the material is uniform and free of particles, the A / B / C / D phase material is obtained and kept warm for later use.

[0086] Steps 1-2, Preparation of E-phase feed solution: The E-phase raw material and 95% by mass of the K-phase raw material are mixed and heated to 87°C while stirring at a speed of 50 Hz. The mixture is stirred until homogeneous to obtain the E-phase liquid, which is then kept warm for later use.

[0087] Steps 1-3, Preparation of F / G / H phase feed solution: Step a: Mix and stir the F phase raw material evenly, then add the G phase raw material at a stirring speed of 35 Hz, and stir evenly to obtain the F / G phase solution.

[0088] Step b: The remaining K-phase raw materials and H-phase raw materials are stirred evenly at a stirring speed of 35 Hz to obtain H-phase liquid.

[0089] Step c: Add 90% by mass of H phase solution to F / G phase solution and stir evenly at 35 Hz to obtain F / G / H phase solution.

[0090] Step d: Detect the pH value of the F / G / H phase solution. When the pH value is between 5 and 6, stop adding the remaining H phase solution. When the pH value is less than 5, continue adding the remaining H phase solution and adjust the pH value of the F / G / H phase solution to between 5 and 6. When the pH value is greater than 6, stop the preparation process of the F / G / H phase solution.

[0091] Step 2: At 92℃, add the E phase liquid to the A / B / C / D phase liquid, and simultaneously start stirring and homogenizing at a stirring speed of 45Hz and a homogenizing speed of 50Hz. After the E phase liquid is added, continue homogenizing at a homogenizing speed of 50Hz for 5 minutes, and then vacuum degas at a pressure of 0.05MPa with a stirring speed of 35Hz. Next, add the F / G / H phase liquid and simultaneously start stirring and homogenizing at a stirring speed of 45Hz and a homogenizing speed of 50Hz for 5 minutes, and then vacuum degas at a pressure of -0.05MPa with a stirring speed of 35Hz.

[0092] Step 3: While stirring at a speed of 35 Hz, cool down. When the temperature drops to 60 ℃, add the J phase raw materials in sequence. Stir at a speed of 35 Hz for 5 minutes, then vacuum degas at a pressure of -0.05 MPa while stirring at a speed of 35 Hz to obtain an oil-in-water face cream.

[0093] Example 3 An oil-in-water face cream, which differs from Example 1, Composition a is composed of hydroxypropyl cyclodextrin and plum blossom extract in a mass ratio of 92:8.

[0094] Composition b consists of 97.775 kg water, 0.2 kg citric acid, 2 kg Leuconostoc mellitus / radish root fermentation product filtrate and 0.2 kg red bean seed extract.

[0095] Composition c consists of 68.8g of water, 30kg of butylene glycol, and 1.2kg of planktonic extract*.

[0096] Oil-phase emollient B is composed of 99.52 kg of wild soybean oil, 0.2 kg of carrot root extract, 0.2 kg of β-carotene, and 0.08 g of vitamin E.

[0097] The usage of each raw material is shown in Table 1.

[0098] The preparation process of water-in-oil face cream includes the following steps: Step 1, Pre-treatment of raw materials: Step 1-1, Preparation of A / B / C / D phase materials: Step a: Mix the A phase raw materials and disperse them until there are no particles or clumps.

[0099] Step b: Add phase B raw material and stir evenly at a stirring speed of 30 Hz.

[0100] Step c: Add the C phase raw material and stir evenly at a stirring speed of 30 Hz.

[0101] Step d: Add the D phase raw material, and heat it to 92°C while stirring at a speed of 30 Hz, then keep it at that temperature for 11 minutes.

[0102] Step e: After the heat preservation is completed, stir and homogenize at a stirring speed of 30Hz and a homogenization speed of 40Hz for 2 minutes. After confirming that the material is uniform and free of particles, the A / B / C / D phase material is obtained and kept warm for later use.

[0103] Steps 1-2, Preparation of E-phase feed solution: The E-phase raw material and 92% by mass of the K-phase raw material were mixed and heated to 85°C while stirring at a speed of 40 Hz. The mixture was stirred until homogeneous to obtain the E-phase liquid, which was then kept warm for later use.

[0104] Steps 1-3, Preparation of F / G / H phase feed solution: Step a: Mix and stir the F phase raw material evenly, then add the G phase raw material at a stirring speed of 30 Hz, and stir evenly to obtain the F / G phase solution.

[0105] Step b: Stir the remaining K-phase raw materials and H-phase raw materials evenly at a stirring speed of 30 Hz to obtain H-phase liquid.

[0106] Step c: Add 85% by mass of H phase solution to F / G phase solution, and stir evenly at 30 Hz to obtain F / G / H phase solution.

[0107] Step d: Detect the pH value of the F / G / H phase solution. When the pH value is between 5 and 6, stop adding the remaining H phase solution. When the pH value is less than 5, continue adding the remaining H phase solution and adjust the pH value of the F / G / H phase solution to between 5 and 6. When the pH value is greater than 6, stop the preparation process of the F / G / H phase solution.

[0108] Step 2: At 87℃, add the E phase liquid to the A / B / C / D phase liquid, and simultaneously start stirring and homogenizing at a stirring speed of 40Hz and a homogenizing speed of 49Hz. After the E phase liquid is added, continue homogenizing at a homogenizing speed of 49Hz for 5 minutes, and then vacuum degas at a pressure of -0.02MPa with a stirring speed of 30Hz. Next, add the F / G / H phase liquid and simultaneously start stirring and homogenizing at a stirring speed of 40Hz and a homogenizing speed of 49Hz for 5 minutes, and then vacuum degas at a pressure of -0.02MPa with a stirring speed of 30Hz.

[0109] Step 3: While stirring at a speed of 30 Hz, cool down. When the temperature drops to 59 ℃, add the J phase raw materials in sequence. Stir at a speed of 30 Hz for 5 minutes, then vacuum degas at a pressure of -0.02 MPa while stirring at a speed of 30 Hz to obtain an oil-in-water face cream.

[0110] Example 4 An oil-in-water face cream, unlike Example 3, further includes composition d, composition e, and composition f as a skin conditioning agent.

[0111] Composition d consists of 99.53 kg of water, 0.4 kg of octyl glycol, and 0.07 kg of acetyl tetrapeptide-2.

[0112] Composition e consists of 63 kg of 1,3-propanediol, 31 kg of water, and 6 kg of chrysanthemum extract.

[0113] Composition f consists of 58.2 kg of 1,3-propanediol, 40 kg of glycerol, 1.7 kg of hop extract, and 0.1 kg of citric acid.

[0114] The usage of each raw material is shown in Table 1.

[0115] Example 5 An oil-in-water face cream, unlike Example 3, further includes composition d, composition e, and composition f as a skin conditioning agent.

[0116] Composition d consists of 99.1 kg water, 0.8 kg octyl glycol, and 0.1 kg acetyl tetrapeptide-2.

[0117] Composition e consists of 59 kg of 1,3-propanediol, 33 kg of water, and 8 kg of chrysanthemum extract.

[0118] Composition f consists of 58.7 kg 1,3-propanediol, 39 kg glycerol, 2 kg hop extract, and 0.3 kg citric acid.

[0119] The usage of each raw material is shown in Table 1.

[0120] Example 6 An oil-in-water face cream, unlike Example 3, further includes composition d, composition e, and composition f as a skin conditioning agent.

[0121] Composition d consists of 99.45 kg of water, 0.5 kg of octyl glycol, and 0.05 kg of acetyl tetrapeptide-2.

[0122] Composition e consists of 61 kg of 1,3-propanediol, 32 kg of water, and 7 kg of chrysanthemum extract.

[0123] Composition f consists of 58.71 kg 1,3-propanediol, 39.14 kg glycerol, 1.95 kg hop extract, and 0.2 kg citric acid.

[0124] The usage of each raw material is shown in Table 1.

[0125] Table 1: Example 7 An oil-in-water face cream, unlike Example 3, does not contain composition a.

[0126] Example 8 An oil-in-water face cream, unlike Example 3, does not contain composition b.

[0127] Example 9 An oil-in-water face cream, unlike Example 3, does not contain composition c.

[0128] Comparative Example 1 An oil-in-water face cream, which differs from Example 3 in that rhamnose is replaced in equal amounts with 1,3-propylene glycol.

[0129] Comparative Example 2 An oil-in-water face cream, which differs from Example 3 in that the amount of rhamnose used is changed to 0.05 kg.

[0130] Comparative Example 3 An oil-in-water face cream, which differs from Example 3 in that the amount of rhamnose used is changed to 0.3 kg.

[0131] Comparative Example 4 An oil-in-water face cream, which differs from Example 3 in that PEG-10 polydimethylsiloxane is replaced in equal amounts with lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane.

[0132] Comparative Example 5 An oil-in-water face cream, which differs from Example 3 in that lauryl PEG-9 polydimethylsiloxane is replaced in equal amounts with PEG-10 polydimethylsiloxane.

[0133] Comparative Example 6 An oil-in-water face cream, which differs from Example 3, Steps 1-3: Mix and stir the F phase raw materials evenly, then add the G phase raw materials and the remaining K phase raw materials at a stirring speed of 30 Hz, and stir evenly to obtain the F / G phase solution.

[0134] Step 2: At 87℃, add the E phase liquid to the A / B / C / D phase liquid, and simultaneously start stirring and homogenizing at a stirring speed of 40Hz and a homogenizing speed of 49Hz. After the E phase liquid is added, continue homogenizing at a homogenizing speed of 49Hz for 5 minutes, and then vacuum degas at a pressure of -0.02MPa with a stirring speed of 30Hz. Then add the F / G phase liquid and simultaneously start stirring and homogenizing at a stirring speed of 40Hz and a homogenizing speed of 49Hz for 5 minutes, and then vacuum degas at a pressure of -0.02MPa with a stirring speed of 30Hz.

[0135] Step 3: While stirring at a speed of 30 Hz, cool down. When the temperature drops to 59 ℃, add the J phase and H phase raw materials in sequence. Stir at a speed of 30 Hz for 5 minutes, then vacuum degas at a pressure of -0.02 MPa while stirring at a speed of 30 Hz to obtain an oil-in-water face cream.

[0136] Comparative Example 7 An oil-in-water face cream, which differs from Example 3, Step 1, Pre-treatment of raw materials: Step 1-1, Preparation of A / B / C / D phase materials: Mix phase A, add phase B, phase C, and phase D raw materials, and heat to 92℃ while stirring at 30Hz. Hold at this temperature for 11 minutes. After holding, stir and homogenize simultaneously at 30Hz and 40Hz for 2 minutes. Once the material is confirmed to be homogeneous and free of particles, the A / B / C / D phase material is obtained and kept warm for later use.

[0137] Steps 1-2, Preparation of E / F / G phase feed solution: The E-phase, K-phase, F-phase, and G-phase raw materials are mixed and heated to 85°C while stirring at a speed of 40 Hz. The mixture is stirred until homogeneous to obtain the E / F / G phase liquid, which is then kept warm for later use.

[0138] Step 2: At 87℃, add the E / F / G phase liquid to the A / B / C / D phase liquid, and simultaneously start stirring and homogenizing at a stirring speed of 40Hz and a homogenizing speed of 49Hz. After the E / F / G phase liquid is added, continue homogenizing at a homogenizing speed of 49Hz for 5 minutes, and then vacuum degas at a pressure of -0.02MPa with a stirring speed of 30Hz.

[0139] Step 3: While stirring at a speed of 30 Hz, cool down. When the temperature drops to 59 ℃, add the J phase and H phase raw materials in sequence. Stir at a speed of 30 Hz for 5 minutes, then vacuum degas at a pressure of -0.02 MPa while stirring at a speed of 30 Hz to obtain an oil-in-water face cream.

[0140] Efficacy testing Test 1 Stability testing: Test substances: the oil-in-water face creams of the above-described embodiments and comparative examples.

[0141] The test sample was placed at 25℃, 48℃, -15℃ and -18℃ for 30 days each. The properties of the test sample before and after storage under each condition were checked and recorded. It was determined whether the odor of the sample changed, whether the appearance was uniform and stable, whether there was any color difference, whether there was any change in texture, whether there was any crystal precipitation, etc. The test results are recorded in Table 2.

[0142] Table 2: Detection 2 Patch test: Refer to Chapter 7, Section 2, Human Skin Patch Tests, Section 6.1, Occlusive Patch Test, of the Cosmetic Safety Technical Specifications (2015 Edition).

[0143] Test substances: Water-in-oil face creams of Example 3, Comparative Example 6, and Comparative Example 7.

[0144] Several volunteers who met the inclusion criteria were selected and divided into two groups of 30 each. Patch tests were conducted. During the test, qualified patch testing equipment was used. The test substance was placed in the patch testing device using the closed patch testing method. The patch was then applied to the back of the subject with hypoallergenic adhesive tape. The test substance was removed after 24 hours. Skin reactions were observed at 0.5, 24 and 48 hours after removal. The results were recorded in Table 3 according to the skin reaction grading standard in the current effective technical specifications.

[0145] The standards are as follows: 0 negative reaction; 1. Suspicious reaction; only slight erythema; 2. Weak positive reaction (erythema reaction); erythema, infiltration, edema, and papules may be present; 3. Strong positive reaction (herpes reaction); erythema, infiltration, edema, papules, vesicles; the reaction may extend beyond the tested area; 4. Extremely strong positive reaction (confluent herpes reaction); obvious erythema, severe infiltration, edema, confluent herpes; reaction extends beyond the test area.

[0146] Table 3: Detection 3 Efficacy evaluation: Test samples: the oil-in-water face creams of the above embodiments and comparative examples.

[0147] Several volunteers aged 25-55 were selected. After patch testing, they showed no allergic reaction to the applied oil-in-water cream, had not undergone any cosmetic procedures in the past six months, had no skin diseases, and exhibited rough, dull, and wrinkled facial skin. They were divided into 16 groups of 10 participants each. The volunteers applied the test sample morning and evening after cleansing, at a dosage of 2 mg / cm³. 2 Use continuously for 28 days.

[0148] 1. Before the evaluation, the initial value of skin gloss was measured using the CK GL200 skin gloss meter, and the skin gloss was measured after 7, 14, and 28 days of use. The gloss change rate (%) was calculated as [(after use - initial value) / initial value] * 100%. The average value of the test results is shown in Table X.

[0149] 2. Before the evaluation, the initial wrinkle condition of the skin and the wrinkle condition of the skin after 7, 14, and 28 days of use were detected using the PRIMOS rapid 3D skin imaging system. The wrinkle change rate (%) was calculated as [(initial value - after use) / initial value] * 100%. The average value of the detection results is shown in Table 4.

[0150] 3. After using the face cream for 28 days, we evaluated it based on the following criteria: 5 points: The skin became noticeably more radiant, the texture became noticeably smoother, firmer, and more elastic, with no yellowing or dullness. 4 points: Skin tone is radiant, skin texture is delicate and smooth, and skin elasticity and dullness are improved; 3 points: Skin tone has brightened, skin texture has become more delicate, and dullness has improved; 2 points: It has a certain effect on improving dull and yellow skin tone, and the skin shows a visible improvement in smoothness. 1 point: The improvement in skin texture is difficult to detect with the naked eye.

[0151] The evaluation results are taken as the average value, as shown in Table 4.

[0152] Table 4: Based on the analysis of Examples 1-9, Comparative Examples 1-7 and Table 2-4, it is easy to see that Examples 1-9 have better stability, gentleness and skin-nourishing effect.

[0153] Based on the analysis of Example 3 and Comparative Examples 1-3, the difference between Comparative Examples 1-3 and Example 3 is that rhamnose was not added or the amount added was not in the range of 0.1% to 0.2%. Example 3 has a better effect in reducing the freezing point of the water-in-oil cream. Therefore, the applicant believes that only by adding 0.1% to 0.2% rhamnose to the water-in-oil cream can a very significant effect in reducing the freezing point be achieved, thereby improving the low-temperature stability of the water-in-oil cream.

[0154] Based on the analysis of Examples 3 and 7-9, the difference between Examples 7-9 and Example 3 is that Plum Blossom Extract, Leuconostoc mellitus / Radish Root Ferment Filtrate, Red Bean Seed Extract, and Plankton Extract were not added simultaneously. Example 3 has better effects on nourishing the skin, improving skin tone, and reducing wrinkles. Therefore, the applicant believes that the combination of Plum Blossom Extract, Leuconostoc mellitus / Radish Root Ferment Filtrate, Red Bean Seed Extract, and Plankton Extract can significantly improve the skin's anti-pollution ability, especially enhancing the skin's resistance to particulate matter and volatile organic compounds in smog. From both protective and nourishing perspectives, it significantly improves the skin's smoothness and radiance.

[0155] Based on the analysis of Examples 3 and 4-6, Examples 4-6, compared to Example 3, contain acetyl tetrapeptide-2, chamomile extract, and hops extract. Examples 4-6 exhibit better anti-wrinkle effects and improve skin condition. Therefore, the applicant believes that adding acetyl tetrapeptide-2, chamomile extract, and hops extract to an oil-in-water cream has a good synergistic effect, further enhancing the anti-aging and antioxidant effects of the oil-in-water cream, further strengthening the skin's absorption of functional substances, and further stimulating the dermis to achieve better immediate and long-lasting anti-wrinkle effects, providing consumers with a gentler and more effective skincare experience.

[0156] Based on the analysis of Example 3 and Comparative Examples 6 and 7, it is easy to see that the preparation methods of Comparative Examples 6 and 7 are different from those of Example 3. Example 3 exhibits good stability, skin care effect, and gentleness. The applicant believes that this is because Example 3 adopted a pre-adjustment of pH, which effectively stabilized the functional ingredients in the water-in-oil cream and effectively solved the irritation problem after the combination of multiple functional ingredients, significantly reducing the irritation of the water-in-oil cream. In contrast, Comparative Example 6 adopted a final pH adjustment method, which could not specifically adjust the pH value of the aqueous phase, so the irritation problem still existed. However, since Comparative Example 6 adopted a batch mixing method for the raw materials, this reduced the loss of functional ingredients during the preparation process compared to the direct mixing method of Comparative Example 7. Therefore, the skin care effect of Comparative Example 6 is better than that of Comparative Example 7, while Comparative Example 7 exhibits gentleness due to the loss of functional ingredients.

[0157] 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 water-in-oil type cream characterized by, The oil-in-water emulsion face cream comprises the following ingredients by weight percentage: Phase A: 10%~15% cyclopentamethoxysiloxane, 4.6%~6.5% oil phase thickener A; Phase B: 4.9%~6.8% oil phase emollient A, 2%~3% filler A, 1%~3% PEG-10 polydimethylsiloxane, 1%~2% lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane; Phase C: 5%~10% octyl polymethylsiloxane, 3.2%~4.8% filler B; Phase D: 3.5%~6.5% oil phase thickener B; Phase E: 5%~10% Butanediol, 0.1%~0.2% Rhamnose, 0.5%~1% Sodium Chloride, 0.1%~0.5% Antioxidant, 2.5%~5% Humectant; Phase F: 4.902%~10.81% skin conditioning agent; G Phase: 0.4%~0.8% aqueous emollient; Phase H: 0.01%~0.1% pH adjuster; Phase J: 0.1%~0.2% fragrance, 0.05%~0.1% oil phase emollient B; K phase: 30%~35% water; In the preparation of water-in-oil face cream, the F phase, G phase, H phase and water accounting for 5% to 10% of the total mass of K phase water are premixed and the pH value is adjusted to 5 to 6. The skin conditioning agent comprises at least composition a, composition b, and composition c; and by weight percentage of an oil-in-water face cream, it comprises 0.4% to 0.8% composition a, 1.5% to 2.5% composition b, and 1% to 2% composition c. Wherein, composition a is composed of hydroxypropyl cyclodextrin and plum blossom extract in a mass ratio of 92:8; Composition b consists of 97.775 kg water, 0.2 kg citric acid, 2 kg Leuconostoc mellitus / radish root fermentation product filtrate, and 0.2 kg red bean seed extract; The composition c consists of 68.8 kg of water, 30 kg of butylene glycol, and 1.2 kg of planktonic extract; The preparation method of the oil-in-water face cream includes the following steps: Step 1, Pre-treatment of raw materials: Step 1-1: Mix phase A raw materials until there are no particles or clumps. Add phase B raw materials and stir evenly. Then add phase C raw materials and stir evenly. Add phase D raw materials and heat to 91~95℃ while stirring. Keep warm for 10~12 minutes. After the holding time is completed, homogenize to obtain phase A / B / C / D material. Keep warm for later use. Steps 1-2: Mix the E-phase raw material with 90%~95% K-phase raw material by mass, and heat to 84~87℃ while stirring. Stir until homogeneous to obtain the E-phase liquid, and keep it warm for later use. Steps 1-3: Mix and stir the F phase raw materials evenly, then add the G phase raw materials while stirring, stir evenly, then add the H phase raw materials and the remaining K phase raw materials, continue to stir evenly, and adjust the pH value of the mixture to 5~6 to obtain the F / G / H phase solution, keep it warm for later use; Step 2: At 85~92℃, add the E phase liquid to the A / B / C / D phase liquid, stir evenly, and then vacuum degas; then add the F / G / H phase liquid and stir evenly. Step 3: When the temperature drops to 58~60℃, add the J phase raw material, stir evenly, and then vacuum degas to obtain an oil-in-water face cream.

2. The oil-in-water face cream according to claim 1, characterized in that, Based on the mass percentage of the oil-in-water face cream, the filler B comprises 0.8% to 1.2% vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer, 0.8% to 1.2% boron nitride, 0.8% to 1.2% methyl methacrylate crosspolymer, and 0.8% to 1.2% silica.

3. The oil-in-water face cream according to claim 1, characterized in that, Based on the mass percentage of the oil-in-water face cream, the oil phase thickener A comprises 4%~5% polydimethylsiloxane, 0.5%~1% distearate dimethylammonium lithium montmorillonite, and 0.1%~0.5% triethyl citrate, and the oil phase thickener B comprises 1.5%~2.5% trimethylammonium chloride, 1%~2% synthetic wax, and 1%~2% white beeswax.

4. The oil-in-water face cream according to claim 1, characterized in that, Based on the mass percentage of the oil-in-water face cream, the oil phase emollient A comprises 4%~5% polydimethylsiloxane, 0.5%~1% polydimethylsiloxane crosspolymer, and 0.4%~0.8% triglyceride (ethylhexanoate).

5. The oil-in-water face cream according to claim 1, characterized in that, The oil-phase emollient B is composed of 99.5wt%~99.6wt% wild soybean oil, 0.1wt%~0.3wt% carrot root extract, 0.1wt%~0.3wt% β-carotene and 0.05wt%~0.1wt% vitamin E.

6. The oil-in-water face cream according to claim 1, characterized in that, Steps 1-3 are described below: Step a: Mix and stir the F phase raw material evenly, then add the G phase raw material while stirring, and stir evenly to obtain the F / G phase solution; Step b: After thoroughly mixing the remaining K-phase raw materials and H-phase raw materials, an H-phase liquid is obtained; Step c: Add 80%~90% by mass of H phase solution to F / G phase solution, stir evenly to obtain F / G / H phase solution; Step d: Detect the pH value of the F / G / H phase solution. When the pH value is between 5 and 6, stop adding the remaining H phase solution. When the pH value is less than 5, continue adding the remaining H phase solution and adjust the pH value of the F / G / H phase solution to between 5 and 6. When the pH value is greater than 6, stop the preparation process of the F / G / H phase solution.

7. The oil-in-water face cream according to claim 1, characterized in that, Step 2 is described as follows: At 85~92℃, the E-phase liquid is added to the A / B / C / D phase liquid, and stirring and homogenization are started simultaneously at a stirring speed of 35~45Hz and a homogenization speed of 48~50Hz. After the E-phase liquid is added, homogenization is continued at a homogenization speed of 48~50Hz for 5~6 minutes. Then, vacuum degassing is performed at a stirring speed of 20~35Hz and a pressure of -0.01~-0.05MPa. Next, the F / G / H phase liquid is added, and stirring and homogenization are started simultaneously at a stirring speed of 35~45Hz and a homogenization speed of 48~50Hz for 5~6 minutes. Then, vacuum degassing is performed at a stirring speed of 20~35Hz and a pressure of -0.01~-0.05MPa.

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