A multifunctional dual-compartment oil-based facial mask and its preparation method

Abstract

This invention discloses a multifunctional double-compartment oil-based facial mask and its preparation method. The mask comprises an oil gel and a mask substrate carrying a water-based essence. The oil gel is formulated with sucrose laurate, sucrose stearate, glycerin, water, and moisturizing oils. The water-based essence comprises PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, PEG / PPG-14 / 7 dimethyl ether, a functional composition, and water. In use, the oil gel is applied to the facial skin surface, and then the mask substrate carrying the water-based essence is applied to the face. After gentle massage, the oil gel and the water-based essence undergo an in-situ emulsification reaction to form a uniform emulsion. The oil-based facial mask of this invention has multiple advantages, including uniform emulsion particle size, convenient use, diverse application methods, and the combination of conventional mask effects and deep cleansing.

Description

Technical Field

[0001] This invention belongs to the field of skin care and cosmetic technology, specifically to a multifunctional double-compartment oil-based facial mask and its preparation method. Background Technology

[0002] Among existing topical skincare formulations, functional sheet masks are the mainstream facial care products, primarily used for repairing the facial barrier and moisturizing the skin. With continuous optimization of skincare formulation processes, facial care products are gradually evolving from basic moisturizing to refined, multi-faceted care. Oil-based masks, formulated using an oil-based skincare mechanism, have become commonly used products in the facial care field. The oil-based skincare mechanism utilizes moisturizing oils to match the physicochemical properties of the human sebum membrane, replenishing lost lipids and repairing the damaged skin barrier. Currently, oil-based masks on the market are mainly divided into three types: dual-compartment packaging, pre-emulsified integrated packaging, and independent oil-phase application, commonly used for daily moisturizing and skin barrier repair. Sunscreen film-forming agents and hydrophobic components of makeup applied to the face tend to accumulate on the skin surface and clog pores. The industry urgently needs skincare products with both cleansing and nourishing properties, driving the iterative optimization of oil-based mask formulations and product structures.

[0003] Existing oil-based facial masks of this type generally suffer from several technical defects in terms of structure, formulation, and efficacy during practical application. Firstly, dual-compartment oil-based masks separate the water and oil phases. The water phase is a skincare liquid formulated with water-soluble ingredients, while the oil phase is an oily liquid formulated with fat-soluble moisturizing ingredients. These require manual mixing and emulsification before use. Emulsification refers to the process of mixing the oil and water phases to form a homogeneous dispersion system. Manual mixing is subject to unstable external forces, easily leading to uneven emulsion particle size, oil-water separation, incomplete emulsification, and poor skin absorption. Secondly, existing pre-emulsified oil-based masks are limited by system compatibility, preventing the high-proportion compounding of moisturizing oil esters. Oil esters are oily ingredients with water-locking and moisturizing properties; the limited addition of these ingredients directly results in insufficient moisturizing performance, making them unsuitable for dry skin and skin with a damaged barrier. Thirdly, independently packaged oil-phase products have low matrix viscosity and high fluidity, resulting in poor application controllability and inconvenience. In addition, most existing oil-based masks focus on skin care effects and lack the ability to dissolve makeup residue and remove dead skin cells, making them unsuitable for complex skin care needs.

[0004] To address the aforementioned technical deficiencies, existing technologies in this field have proposed several optimization solutions. For the problem of uneven artificial emulsification, existing technologies optimize the dual-compartment structure, add a microporous flow-guiding structure to assist in the mixing of the two phases, or use a mixing aid to regulate the mixing process. For the problem of insufficient moisturizing properties in pre-emulsified formulas, existing technologies add nonionic emulsifiers to optimize system compatibility. Nonionic emulsifiers are uncharged emulsifying aids with lower skin irritation, slightly increasing the proportion of the oil phase. For the problem of oil phase easy flow, thickeners are added to increase the viscosity of the oil phase matrix, optimizing application performance. For the problem of limited efficacy, conventional solutions incorporate organic acid active ingredients to achieve exfoliation and oil dissolution, supplementing cleansing effects.

[0005] The aforementioned existing improvement solutions still have inherent technical flaws and fail to completely solve the industry's pain points. Optimizing the cavity structure and adding external stirring aids can only mitigate mixing deviations; they cannot precisely control the emulsified particle size, and the problem of uneven emulsification persists. Nonionic emulsifiers have physicochemical limits in increasing the oil phase, making it impossible to formulate highly moisturizing formulas; excessive addition of emulsifying aids can easily cause skin irritation and discomfort. Thickening components modifying the oil phase can easily result in a sticky feel and clogged pores. Organic acid cleansing components are highly irritating, easily damaging the delicate skin barrier, and have difficulty dissolving waterproof makeup and sunscreen residues, resulting in limited cleansing efficacy. In summary, there is currently no technical solution for oil-based masks that can simultaneously achieve ease of use, emulsification uniformity, comfortable application, gentle cleansing, and long-lasting nourishment; corresponding technologies are urgently needed to fill this gap in the field. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a multifunctional dual-compartment oil-based facial mask and its preparation method. The oil-based facial mask of this invention has multiple advantages, including uniform emulsified particle size, convenient use, diverse application methods, and the combination of conventional facial mask effects with deep cleansing.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional dual-compartment oil-based facial mask, comprising an oil gel and a mask substrate carrying a water-based essence, wherein the oil gel is formulated from sucrose laurate, sucrose stearate, glycerin, water and moisturizing oils, and the water-based essence comprises PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, PEG / PPG-14 / 7 dimethyl ether, a functional composition and water; When using, apply the oil gel to the surface of the facial skin, then apply the mask base containing the water-based essence to the face. After gentle massage, the oil gel and the water-based essence undergo an in-situ emulsification reaction to form a uniform emulsion.

[0008] Furthermore, by mass percentage, the components of the oleogel include: 0.6%~1.5% sucrose laurate, 0.1%~1% sucrose stearate, 8%~20% glycerin, 2%~5% water, and the balance being moisturizing oils, with the sum of the mass percentages of each component being 100%.

[0009] Furthermore, by weight percentage, the preferred components of the oleogel include: 1% sucrose laurate, 0.5% sucrose stearate, 10% glycerol, 3% water, and 85.5% caprylic / capric triglyceride.

[0010] Furthermore, the moisturizing oil is obtained by compounding one or more of synthetic oil esters and plant oils. The synthetic oil ester is selected from at least one of caprylic / capric triglyceride, triglyceride (ethylhexanoate), and isononyl isononanoate. The plant oil is selected from at least one of jojoba oil, macadamia seed oil, and olive oil.

[0011] Furthermore, by mass percentage, the water-based essence comprises: 0.1%~0.5% PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, 0.4%~1.5% PEG / PPG-14 / 7 dimethyl ether, 0.5%~20% functional composition, and the balance being water, with the sum of the mass percentages of each component being 100%.

[0012] Furthermore, by weight percentage, the preferred components of the water-based essence include: 0.3% PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, 0.8% PEG / PPG-14 / 7 dimethyl ether, 6.03% functional composition, and the balance being water.

[0013] Furthermore, the functional composition is obtained by compounding at least one of glycerol, 1,2-pentanediol, betaine, hydroxyethyl cellulose, carbomer, phenoxyethanol, and p-hydroxyacetophenone.

[0014] This invention also provides a method for preparing a multifunctional double-compartment oil-based facial mask, comprising the following steps: Preparation of oleogel: Sucrose laurate, sucrose stearate, glycerin and water are mixed, heated and stirred until completely dissolved to obtain mixture A; while maintaining the temperature, moisturizing oil is slowly added dropwise to mixture A, stirred and cooled to obtain oleogel; Preparation of water-based essence: Mix water, functional composition, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin and PEG / PPG-14 / 7 dimethyl ether, heat and stir until completely dissolved, and cool to obtain water-based essence; Preparation of a mask substrate containing water-based essence: The water-based essence is filled into a packaging container containing the mask substrate, soaked for 10-15 minutes, and then sealed to obtain a mask substrate containing water-based essence.

[0015] When preparing the oleogel, the heating temperature is 80℃~85℃, the stirring rate after mixing sucrose laurate, sucrose stearate, glycerin and water is 300~500 r / min, and the stirring time is 20~30 min. After adding the moisturizing oil, the stirring rate is 400~600 r / min, and the stirring time is 30~40 min. The cooling temperature is 30℃~40℃.

[0016] When preparing water-based essence, the heating temperature is 80℃~85℃, the stirring rate is 300~500r / min, the stirring time is 25~35min, and the cooling temperature is 30℃~40℃.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: This invention provides a multifunctional dual-compartment oil-based facial mask, consisting of an oil gel and a mask substrate carrying a water-based essence. The oil gel uses a compound system of sucrose laurate and sucrose stearate, glycerin, water, and moisturizing oils as raw materials. Without the need for additional thickeners, it can form a thin-layered D-phase structure under the action of glycerin adjusting the HLB value. Sucrose fatty acid esters, as nonionic surfactants, have their hydrophilic sucrose groups and lipophilic fatty acid groups arranged in a regular manner to form a layered structure. After glycerin adjusts the HLB value of the compound system, this structure further forms a thin-layered D-phase structure with surfactant aggregation. Moisturizing oils fill the lipophilic layer of this structure, making the structure compact and ultimately forming an oil gel with low fluidity and moderate viscosity. It is stable and does not flow easily, avoiding the stickiness caused by oily thickeners and improving the application feel, making it more convenient to use. This water-based serum contains two surface-active moisturizers: PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin and PEG / PPG-14 / 7 dimethyl ether. Their synergistic effect significantly improves the emulsification efficiency of the oil gel. The long ester-loving side chain of PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin promotes uniform dispersion of the oil gel, facilitating the formation of emulsions with uniform particle size. The solubilizing properties of PEG / PPG-14 / 7 dimethyl ether further reduce the emulsion particle size. The combination of these two ingredients results in smaller and more uniform emulsion particles, improving skin feel and user experience, and also facilitating the absorption of active ingredients. Furthermore, this product features in-situ facial emulsification, eliminating the need for pre-mixing the oil gel and water-based serum. Simply apply the oil gel to the face, then place a sheet mask containing the water-based serum on top and gently massage to form a smooth and even emulsion. Alternatively, the oil gel can be applied directly after the sheet mask without massage, adapting to different usage habits. In addition, thanks to its oil-dissolving and highly emulsifying system, the product can quickly dissolve facial makeup (including waterproof makeup), sunscreen residue, and excess oil on the skin's surface. It also provides basic moisturizing and deep cleansing, achieving the dual benefits of makeup removal and basic skincare. No additional makeup remover is needed, greatly improving ease of use.

[0018] Furthermore, by refining the formulation range, raw material types, and optimal ratios of oil-gel and water-based serums, the combined effects of makeup removal, cleansing, moisturizing, and nourishing can be further enhanced, while consolidating the advantages of good stability, convenient application, and uniform emulsification. The rational ratio of components in the oil-gel allows for precise control of the D-phase structure, ensuring a balance between viscosity and spreadability, guaranteeing its stability and smooth application. The flexible blending of moisturizing oils not only optimizes the moisturizing effect but also further enhances the dissolving ability of makeup oils, strengthening the deep cleansing effect. The combination of functional components in the water-based serum enriches skincare effects such as moisturizing and nourishing, extends shelf life, and, with optimal ratios, results in higher emulsification uniformity, a finer skin texture, more thorough makeup removal, and a refreshing, non-sticky feel. The preparation method of this invention is simple and has clear parameters. It can precisely control parameters such as heating temperature and stirring rate, which can ensure the stable formation of the D phase structure of the oleogel and the full dissolution of each raw material of the water-based essence. This ensures that the synergistic effect of the two surface-active moisturizers is fully exerted, while ensuring that the mask substrate is fully soaked in the water-based essence. This ensures that the product's makeup removal, cleansing, moisturizing and nourishing effects and ease of use are stable. Moreover, it does not require complicated equipment, is suitable for large-scale industrial production, and reduces promotion costs.

[0019] In summary, the multifunctional dual-compartment oil-based facial mask of this invention maintains a stable form without the need for additional thickeners, is easy to apply without stickiness, employs an in-situ emulsification design, offers flexible usage methods to suit different user habits, and features uniform emulsification and consistent particle size, resulting in a delicate skin feel and facilitating the absorption of active ingredients. Its multi-functional properties provide basic moisturizing and nourishment while, thanks to its oil-dissolving and high emulsification properties, deeply cleanses makeup and sunscreen residue, thus also serving as a makeup remover and cleanser. Attached Figure Description

[0020] Figure 1 Samples and stability test results of Examples 1-5 and Comparative Examples 1-6.

[0021] Figure 2 Emulsification effect of samples in Examples 6-10 and Comparative Examples 7-9.

[0022] Figure 3 The makeup removal ability (E) of the dual-compartment facial mask liquid. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] This invention provides a multifunctional dual-compartment oil-based facial mask. The mask employs a dual-compartment independent storage structure, specifically including an oil compartment and a mask compartment that are isolated from each other. The oil compartment is filled with oil gel, and the mask compartment contains a mask sheet soaked in water-based essence. The method of using this dual-compartment oil-based facial mask is as follows: First, evenly apply the oil gel from the oil compartment to the facial skin. Then, take the mask sheet from the mask compartment, which contains water-based essence, and apply it to the face. Gently massage the facial skin with your fingertips to fully mix the oil gel and water-based essence, thus forming a lotion-like mask. This lotion-like mask not only has excellent skin-nourishing effects but also removes facial makeup without the need for additional makeup remover.

[0025] I. Components and proportions of oleogel The oil gel of this invention, by weight percentage, comprises the following components: 0.6%~1.5% sucrose laurate, 0.1%~1% sucrose stearate, 8%~20% glycerin, 2%~5% water, and 72.5%~89.4% emollient oil esters, with the sum of the weight percentages of each component being 100%. The synergistic effect of these components ensures that the oil gel possesses good texture uniformity and spreadability, while also allowing for rapid mixing with subsequent water-based serums to form a stable emulsion.

[0026] Preferably, the moisturizing oil can be obtained by compounding one or more of synthetic oil esters and vegetable oils. The synthetic oil ester is preferably at least one of caprylic / capric triglyceride, triglyceride (ethylhexanoate), and isononyl isononanoate. The vegetable oil is preferably at least one of jojoba oil, macadamia seed oil, and olive oil. This invention does not further limit the specific type of moisturizing oil. The type and compounding ratio of moisturizing oil can be reasonably selected according to the actual product formula design requirements and the market raw material supply.

[0027] In a preferred embodiment of the present invention, the oil gel comprises, by weight percentage: 1% sucrose laurate, 0.5% sucrose stearate, 10% glycerin, 3% water, and 85.5% caprylic / capric triglycerides. The oil gel prepared using this preferred formulation has a fine and uniform texture, excellent spreadability, and is non-sticky when applied to facial skin. Furthermore, when mixed with a water-based serum, it forms a fine and stable emulsion, effectively enhancing the skincare and nourishing effects and makeup removal capabilities of the product. This is the most preferred oil gel formulation of the present invention.

[0028] II. Preparation methods of oleogels The present invention also provides a method for preparing the above-mentioned oleogel, specifically including the following steps: S1. According to the above composition and ratio of oleogel, accurately weigh sucrose laurate, sucrose stearate, glycerin and water, add the above raw materials to the reaction vessel, turn on the stirring device to mix, and at the same time heat the temperature inside the reaction vessel to 80℃~85℃, and continue stirring until all raw materials are completely dissolved to form a transparent and homogeneous mixture A; wherein, the stirring speed is controlled at 300~500r / min, and the stirring time is 20~30min. By controlling the above stirring parameters, it can be ensured that each raw material is fully dissolved, and particulate impurities are avoided in the finished oleogel product, which would affect the user experience of the product.

[0029] S2. Maintain the temperature inside the reactor at 80℃~85℃, slowly add the specified amount of moisturizing oil ester to mixture A, and continue stirring. The stirring speed is controlled at 400~600r / min, and the stirring time is 30~40min, until the mixture forms a uniform and delicate oil gel. After stirring is completed, stop heating and allow the oil gel to cool naturally to 30℃~40℃. The cooled oil gel can then be filled into the pre-set oil tank to complete the preparation of the oil tank.

[0030] III. Components and Proportions of Water-Based Essence By weight percentage, the water-based essence of this invention comprises the following components: 0.1%~0.5% PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, 0.4%~1.5% PEG / PPG-14 / 7 dimethyl ether, 0.5%~20% functional composition, and the remainder being water, with the sum of the weight percentages of all components being 100%. The synergistic effect of these components ensures that the water-based essence possesses good fluidity and skin affinity, can quickly soak into a facial mask sheet, and forms a stable emulsion system when mixed with an oil gel.

[0031] In a preferred embodiment of the present invention, the water-based essence, by weight percentage, comprises the following components: 0.3% PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, 0.8% PEG / PPG-14 / 7 dimethyl ether, 6.03% functional composition, and the remainder being water. The water-based essence prepared using this preferred formulation exhibits excellent fluidity, allowing for rapid and thorough saturation of a facial mask sheet. Furthermore, the emulsion formed after mixing with the oil gel demonstrates high stability and is less prone to oil-water separation, thus simultaneously ensuring both skincare and cleansing effects.

[0032] Preferably, the functional composition can be obtained by compounding at least one of glycerin, 1,2-pentanediol, betaine, hydroxyethyl cellulose, carbomer, phenoxyethanol, and p-hydroxyacetophenone according to the skin care needs of the product. This invention does not further limit the specific types and compounding ratios of the functional composition. Specifically, glycerin and betaine can act as moisturizing ingredients to enhance the product's hydrating and moisturizing effects; hydroxyethyl cellulose and carbomer can act as thickeners to adjust the viscosity of the water-based serum; phenoxyethanol and p-hydroxyacetophenone can act as preservatives to extend the product's shelf life. The components and proportions of the functional composition can be rationally combined according to the actual product positioning.

[0033] IV. Preparation Method of Water-Based Essence The present invention also provides a method for preparing the above-mentioned water-based essence, specifically including the following steps: According to the above-mentioned components and proportions of the water-based essence, accurately weigh water, functional composition, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, and PEG / PPG-14 / 7 dimethyl ether. Add the above raw materials to a mixing tank and mix. At the same time, heat the temperature inside the mixing tank to 80℃~85℃, turn on the stirring device and stir continuously. The stirring speed is controlled at 300~500 r / min, and the stirring time is 25~35 min, until all raw materials are completely dissolved and a transparent and homogeneous mixture is formed. After stirring is completed, stop heating and let the mixture cool naturally to 30℃~40℃. The cooled mixture is the water-based essence, which can be used for the subsequent preparation of mask containers.

[0034] V. Preparation method of mask container The preparation method of the mask container of the present invention specifically includes the following steps: The water-based essence obtained above is filled into a packaging container containing a mask sheet according to a preset dosage, allowing the water-based essence to completely saturate the mask sheet. The saturation time is controlled at 10-15 minutes to ensure the mask sheet fully absorbs the water-based essence and maintains a uniform liquid content. After saturation, the packaging container is sealed to obtain the mask container containing the water-based essence. It should be noted that the mask sheet in this invention can be made of conventional mask substrates such as non-woven fabric, Tencel, or silk. The material of the mask sheet can be reasonably selected according to product positioning and cost control requirements; this invention does not further limit its use.

[0035] VI. Assembly of the Double-Compartment Oil Mask After the oil reservoir and mask compartment are prepared, the filled oil reservoir and the prepared mask compartment are assembled in the same outer packaging box. To facilitate users in taking out the oil gel and mask sheet separately, the outer packaging box has independent opening structures corresponding to the positions of the oil reservoir and mask compartment. This invention does not further limit the specific structure of the oil reservoir and mask compartment; conventional structures of existing dual-compartment masks can be used, such as integrated dual-compartment structures or separate dual-compartment structures, as long as the independent storage of the oil reservoir and mask compartment can be achieved and it is convenient for users to take out.

[0036] Examples 1-5 Examples 1-5 of this invention provide an oil gel for a double-compartment oil-based facial mask, the specific formulation of which is shown in Table 1. The preparation method of the oil gel includes the following steps: S1. Mix sucrose laurate, sucrose stearate, glycerol and water, heat to 80℃~85℃, and stir until completely dissolved and transparent to obtain mixture A; S2. Mixture A is continuously stirred at 80℃~85℃. Slowly add preheated decanoic acid / triglyceride or jojoba oil to mixture A at 80℃~85℃ and continue stirring until an oil gel is formed. Cool down to 30℃~40℃. Table 1. Formulation of oleogels in Examples 1-5 (percentage by mass)

[0037] Comparative Examples 1-6 The present invention also provides oleogel formulations for Comparative Examples 1-6, as shown in Table 2. The preparation methods of Comparative Examples 1-6 are the same as those of Examples 1-5, except that the component ratios of the oleogel components are different.

[0038] Table 2 shows the oleogel formulations (by weight) for Comparative Examples 1-6.

[0039] The oil gels prepared in Examples 1-5 and Comparative Examples 1-6 were used as samples. Their appearance was evaluated according to the QB / T 2874 standard for skin care gels. Simultaneously, stability tests were conducted under four accelerated conditions (-18±2℃ for 3 months, -18~40℃ for 24 hours with 10 cycles, and 45±2℃ for 3 months). The results are shown in Table 3. Figure 1 As shown: Table 3 shows the appearance and stability test results of the oleogel in Examples 1-5 and Comparative Examples 1-6.

[0040] like Figure 1As shown, Examples 1-5 all yielded oleogels with good stability. The oleogel obtained in Example 1 was transparent, while those in Examples 4-5 were translucent. Comparative Examples 1-4 lacked any one of sucrose laurate, sucrose stearate, glycerol, or water, resulting in emulsification and poor stability, thus failing to produce stable oleogels. Comparative Examples 5 and 6 had component ratios exceeding the range required by the patent, also failing to yield stable oleogels.

[0041] Examples 6-10 Examples 6-10 are water-based facial mask essences containing different moisturizing compositions, and the specific formulas are shown in Table 4.

[0042] Table 4 shows the formula (by weight) of the facial mask essence in Examples 6-10.

[0043] Comparative Examples 7-10 The present invention also provides water-based facial mask essences for Comparative Examples 7-10, the specific formulations of which are shown in Table 5. The testing methods for Comparative Examples 7-10 are the same as those for Examples 6-10, the difference being that the amounts of PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin and PEG / PPG-14 / 7 dimethyl ether used in the formulations are not within the requirements of the present invention.

[0044] Table 5 shows the formula (by weight) of the essence in the comparative examples 7-10 masks.

[0045] Water-based serum performance test (emulsification effect) Take 25g each of the water-based essences obtained in Examples 6-10 and Comparative Examples 7-10, and soak non-woven fabric mask sheets to prepare water-based mask sheets; take 4g of the oil gel prepared in Example 1 and spread it evenly on the test panel, apply the corresponding water-based mask sheet, and gently massage for 2 minutes to mix the two. Use a laser particle size analyzer (Eomec LS900) to measure the particle size of the mixed emulsion. D50 (median particle size) and Span value (particle size distribution index, Span=(D90-D10) / D50) are used as evaluation indicators. The smaller the Span value, the more uniform the particle size of the emulsion. The test results are shown in Table 6.

[0046] Table 6 shows the particle size distribution data of the emulsions obtained in Examples 6-10 and Comparative Examples 7-10.

[0047] Simultaneously observe the particle size distribution of the emulsion under a microscope (400x), such as... Figure 2As shown, under the dual-compartment mask application method, the emulsions formed after mixing with the oil gel in Examples 6-10 all had a D50 of less than 2.5 μm and a Span value of less than 1.0, indicating that the emulsion particles were small and evenly distributed. In contrast, the emulsions in Comparative Examples 7-10, due to the absence or excessive ratio of the core moisturizing agent, all had a D50 greater than 8 μm and a Span value greater than 1.5, indicating poor emulsification. These results demonstrate that PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin and PEG / PPG-14 / 7 dimethyl ether can effectively improve the emulsification efficiency after mixing the oil gel with the mask essence, resulting in smaller emulsion particle size and higher emulsion particle size uniformity.

[0048] Examples 11-15 To verify the overall performance of the dual-compartment oil-based facial mask of the present invention, Examples 11-15 were set as overall product examples. Each example adopted a dual-compartment independent storage structure and was prepared by combining the oil gel examples 1-5 with the water-based essence example 6, respectively. The specific combination method was as follows: Example 11 is a combination of the oil gel of Example 1 and the water-based serum of Example 6; Example 12 is a combination of the oil gel of Example 2 and the water-based serum of Example 6; Example 13 is a combination of the oil gel of Example 3 and the water-based serum of Example 6. Example 14 is a combination of the oil gel of Example 4 and the water-based serum of Example 6. Example 15 is a combination of the oil gel of Example 5 and the water-based serum of Example 6.

[0049] In all the above embodiments, the mask compartment uses non-woven fabric as the mask cloth substrate, and the soaking time of the water-based essence on the mask cloth is uniformly controlled at 12 minutes.

[0050] Comparative Example 11 The comparative example is a single-compartment oil-based facial mask, which is prepared by directly mixing the oil gel used in Example 11 with the water-based essence, and then filling the mixed material into a single-compartment packaging container. The remaining raw material ratios and preparation process parameters are completely consistent with those of Example 11.

[0051] This invention tested the stability, makeup removal ability, and skincare effect of the overall products from Examples 11-15 and Comparative Example 11. All test methods followed relevant cosmetic industry standards and the pre-designed test scheme of this invention. Specific test methods and quantitative test results are as follows: 1. Stability Test The products of Examples 11-15 and Comparative Example 11 were sealed and stored for 3 months in environments of room temperature (25±1℃), high temperature (45±2℃), and low temperature (-5±2℃), respectively. The product status was observed regularly, and the abnormal phenomena such as oil-water separation, sedimentation, and discoloration were recorded.

[0052] Test results show that the dual-compartment oil-based facial masks of Examples 11-15 did not exhibit any abnormalities such as oil-water separation, sedimentation, or discoloration after being stored for 3 months under the three aforementioned environments; the product condition remained stable, and the product qualification rate was 100%. In contrast, the single-compartment oil-based facial mask of Comparative Example 11 showed significant oil-water separation after being stored for 1 month under high temperature (45±2℃) and low temperature (-5±2℃) conditions, resulting in a product qualification rate of 0%. These test results fully demonstrate that the dual-compartment independent storage structure adopted in this invention can effectively avoid the stability degradation caused by premature mixing of the oil and water phases, significantly improving the product's storage stability and environmental adaptability.

[0053] 2. Makeup removal ability test The makeup removal ability test employed a human skin testing method, selecting 35 eligible subjects aged 20-55 years. All subjects had no serious systemic diseases, immunodeficiency, or autoimmune diseases, and had no history of allergies to skincare cosmetics. Prior to the test, subjects underwent relevant health inquiries and allergy testing to ensure safety. The testing environment was strictly controlled at a temperature of 21±1℃ and humidity of 40-60%. Subjects sat quietly in this environment for 30 minutes, refraining from eating or drinking, with the flexor surface of their forearms fully exposed and placed in a relaxed position, avoiding contact with the test area.

[0054] The testing steps are as follows: First, the skin on the inside of the subject's forearm was washed and allowed to air dry. Two test areas of 2cm×2cm were drawn on the inside of the forearm with a marker, with a distance of no less than 1cm between each test area. The initial state of the test area was photographed using a VISIA-CR skin image analyzer and recorded as E0. Subsequently, 30mg of the same commercially available foundation was taken and evenly applied to each test area. After standing for 30 minutes until the foundation had completely formed a film, the test area was photographed again using the VISIA-CR skin image analyzer and recorded as E1. Next, 5 μL of the mixed Example 11 dual-compartment mask liquid was taken as the experimental group sample and purified water as the control group sample. The liquid was dropped into the corresponding test area and wiped back and forth 5 times at the same speed with the same force and the same wiping method to complete the makeup removal operation. Finally, the test area was rinsed with purified water and gently dried with a lint-free paper towel. The test area was photographed again using the VISIA-CR skin image analyzer and recorded as E2.

[0055] The three photos (E0, E1, and E2) were processed using Image-Pro® Plus image analysis software to extract skin tone values ​​for each test area. The makeup removal ability was then calculated using the following formula: Makeup removal ability (E) = ((E1-E0)-(E2-E0)) / (E1-E0)×100% E1-E0 represents the color difference between the makeup film and its initial state, and E2-E0 represents the color difference between the makeup film and its initial state after removal. The higher the value calculated by this formula, the stronger the makeup removal ability of the product.

[0056] Test Results: Specific data and comparisons of makeup removal capabilities for each test group are as follows: Figure 3 As shown, Figure 3 The comparison chart of the makeup removal capabilities (E) of the dual-compartment facial mask liquid clearly shows the difference in makeup removal capabilities between the experimental group and the control group. Specifically, the makeup removal capability of Example 11 reaches 73.15%; the makeup removal capability of the purified water in the control group is 18.12%. The above test results fully demonstrate that the dual-compartment oil-based facial mask of this invention possesses excellent makeup removal capabilities.

[0057] 3. Skincare effect test The skincare efficacy test was conducted on individuals with dry skin. Thirty participants with dry skin who met the testing criteria were randomly divided into five groups of six. Each group used the double-oil mask described in Examples 11-15, three times a week for four consecutive weeks. The skin's moisture content and transepidermal water loss rate (TEWL) were measured before and after use to evaluate the product's nourishing and skincare effects. The testing instruments used were a Corneometer CM825 and a Tewameter TM300. The testing environment was controlled at a temperature of 21±1℃ and humidity of 40-60%. Before the test, participants were required to sit quietly in this environment for 20 minutes to ensure stable skin condition.

[0058] The test results are summarized below: Before use, the average skin moisture content of the 30 subjects was 28.3±3.5%RH, and the average transepidermal water loss rate (TEWL) was 18.6±2.1g / (m²·h), indicating that the subjects' skin was in a dry state with weak barrier function. After four weeks of continuous use, the average skin moisture content of the subjects increased to 45.7 ± 4.2% RH, and the average transepidermal water loss (TEWL) decreased to 10.2 ± 1.8 g / (m²). 2(h) and none of the subjects experienced adverse reactions such as skin allergies, redness, swelling, or stinging during the test. The above test results indicate that the double-compartment oil mask of this invention can effectively replenish moisture to dry skin, repair the skin barrier, and has excellent nourishing and skincare effects. Furthermore, the product is highly safe and suitable for various skin types.

[0059] In summary, the dual-compartment oil-based facial mask of this invention, through a rational formula design of oil gel and water-based essence, combined with a dual-compartment independent storage structure, solves the technical problems of poor stability and limited functionality of existing oil-based facial masks. It has the core advantages of good stability, uniform emulsification, strong makeup removal ability, and excellent skin care effect. Moreover, the product preparation process is simple and controllable, requiring no complex production equipment, and is suitable for large-scale industrial production. It can effectively meet the market demand for multifunctional, efficient and convenient skin care products, and solve the industry pain points of existing technologies.

Claims

1. A multifunctional double-compartment oil pack, characterized by, An oil gel and a water-based essence-loaded mask substrate, the oil gel is compounded by sucrose laurate, sucrose stearate, glycerin, water and emollient oil, the water-based essence comprises PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, PEG / PPG-14 / 7 dimethyl ether, a functional composition and water; In use, the oil gel is applied on the facial skin surface, and the water-based essence-loaded mask substrate is attached to the face, after gentle massage, the oil gel and the water-based essence occur in-situ emulsification reaction to form a uniform emulsion.

2. The multifunctional double-compartment oil application mask according to claim 1, characterized in that, The components of the oil gel include sucrose laurate 0.6%~1.5%, sucrose stearate 0.1%~1%, glycerin 8%~20%, water 2%~5% and the balance of emollient oil, the sum of the mass percentages of the components is 100%.

3. The multifunctional double-compartment oil application mask according to claim 2, characterized in that, The preferred components of the oil gel include sucrose laurate 1%, sucrose stearate 0.5%, glycerin 10%, water 3% and caprylic / capric triglyceride 85.5%.

4. The multifunctional double-compartment oil application mask according to claim 1, characterized in that, The emollient oil is compounded by one or more of synthetic oil esters and plant oils, the synthetic oil esters are selected from at least one of caprylic / capric triglyceride, glyceryl tri(ethylhexanoate) and isononyl isononanoate, and the plant oils are selected from at least one of jojoba oil, macadamia seed oil and olive oil.

5. The multifunctional double-compartment oil application mask according to claim 1, characterized in that, The components of the water-based essence include PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin 0.1%~0.5%, PEG / PPG-14 / 7 dimethyl ether 0.4%~1.5%, a functional composition 0.5%~20% and the balance of water, the sum of the mass percentages of the components is 100%.

6. The multifunctional double-compartment oil application mask according to claim 5, characterized in that, The preferred components of the water-based essence include PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin 0.3%, PEG / PPG-14 / 7 dimethyl ether 0.8%, a functional composition 6.03% and the balance of water.

7. The multifunctional double-compartment oil application mask according to claim 1, characterized in that, The functional composition is compounded by at least one of glycerin, 1,2-pentanediol, betaine, hydroxyethyl cellulose, carbomer, phenoxyethanol and p-hydroxyacetophenone.

8. A method for preparing a multifunctional double-compartment oil-based facial mask according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: Preparation of the oil gel: sucrose laurate, sucrose stearate, glycerin and water are mixed, heated and stirred until completely dissolved to obtain a mixture A; the temperature is maintained, and the emollient oil is slowly added to the mixture A, stirred and cooled to obtain the oil gel; Preparation of the water-based essence: water, a functional composition, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin and PEG / PPG-14 / 7 dimethyl ether are mixed, heated and stirred until completely dissolved, and then cooled to obtain the water-based essence; Preparation of the water-based essence-loaded mask substrate: the water-based essence is filled into a packaging container containing a mask substrate, soaked for 10~15 min and then sealed to obtain the water-based essence-loaded mask substrate.

9. The method of claim 8, wherein the multi-functional double pack oil pack mask is prepared by mixing the first pack and the second pack. When preparing the oil gel, the heating temperature is 80-85℃, the stirring speed of the mixture of sucrose laurate, sucrose stearate, glycerol and water is 300-500r / min, the stirring time is 20-30min, the stirring speed after adding the emollient oil is 400-600r / min, the stirring time is 30-40min, and the cooling temperature is 30-40℃.

10. The method of claim 8, wherein the multi-functional double pack oil pack mask is prepared by mixing the first pack and the second pack. When preparing the water-based essence, the heating temperature is 80-85℃, the stirring speed is 300-500r / min, the stirring time is 25-35min, and the cooling temperature is 30-40℃.

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