Preparation method and product of a transfer-resistant, long-wear, air cushion foundation

Abstract

The application discloses a preparation method and product of a makeup cushion powder capable of preventing makeup from being smudged, and the preparation process comprises a pre-activation step of 0.3-1.5 parts of quaternary ammonium salt-bentonite and 0.05-0.5 parts of tea (CAMELLIA SINENSIS) leaf extract, and 3-8 parts of trimethylsiloxy silicate is added in an oil phase preparation step. Through the synergistic effect of the three, the film forming mechanism of the makeup cushion powder system is completely different. By regulating the rheological properties of the system, a composite film layer with flexibility, rigidity and high adhesion is constructed, and a very strong anti-smudging effect is realized under the premise of light and thin skin. The application provides a new makeup cushion powder product and a premix oil gel for producing the same, and provides a new path for the production of the makeup cushion powder product.

Description

Technical Field

[0001] This invention relates to the field of cosmetics technology, specifically to a method for preparing and a product of a non-smudge-proof, long-lasting cushion foundation. Background Technology

[0002] Cushion foundations have become mainstream base makeup products due to their portability, even application, and natural finish. However, they generally have the following drawbacks: 1. Poor smudge-proof performance; friction from masks, clothing, etc., can easily cause makeup to come off, resulting in patchy makeup. 2. It is difficult to balance the film-forming agent with the skin feel; adding more film-forming agents can make the product heavy and dry, while lightweight products have poor friction resistance. 3. Weak staying power; the film layer is easily damaged after oil and sweat, affecting the appearance of the makeup.

[0003] To address the issue of insufficient makeup longevity in oil-in-water and all-oil foundation systems, Chinese patent document CN201710974203.4 discloses a long-lasting, long-lasting cushion BB cream and its preparation method. To address issues related to skin adhesion, breathability, makeup longevity, and coverage, Chinese patent document CN202510566748.6 discloses a high-coverage, long-lasting cushion and its preparation method. Existing technologies do not address the anti-smudging performance of cushions after use. Simply adding film-forming agents can lead to brittleness, stickiness, and insufficient anti-smudging properties. Alternatively, using rheology modifiers only for system stability results in uneven raw material dispersion and a difficulty in simultaneously achieving both skin feel and long-lasting makeup. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a method and product for preparing a smudge-proof and long-lasting cushion foundation, and to provide a premixed oil gel for the smudge-proof and long-lasting cushion foundation and its preparation method, which is achieved by the following technical solution.

[0005] A premixed oil gel for anti-smudge and long-lasting cushion foundation, comprising, by weight, 0.3-1.5 parts of quaternary ammonium salt-90 bentonite and 0.05-0.5 parts of tea (CAMELLIA SINENSIS) leaf extract, undergoing pre-activation treatment. The preparation steps include: stirring 5.8-6.6 parts of methyl polytrimethylsiloxane and 3-3.4 parts of C13-15 alkyl evenly as an activation solvent, which is low in polarity and consistent with the main formulation oil to ensure good compatibility between the activated product and the main system; then adding quaternary ammonium salt-90 bentonite and continuing stirring to initially disperse the quaternary ammonium salt-90 bentonite evenly; finally, slowly adding tea (CAMELLIA SINENSIS) leaf extract and continuing stirring to carry out the activation reaction until the system becomes a uniform gel, thus obtaining the premixed oil gel. Preferably, the activation reaction conditions are: stirring at 500-1000 rpm for 30-50 minutes at room temperature. These conditions can promote the complete exfoliation of the bentonite sheets while avoiding the deactivation of polyphenols from the tea extract.

[0006] A method for preparing a non-smudge-proof and long-lasting cushion foundation includes the following steps, wherein the raw materials used are in parts by weight: (1) Preparation of premixed oleogel containing quaternary ammonium salt-90 bentonite and tea (CAMELLIA SINENSIS) leaf extract, using the aforementioned method, for later use.

[0007] (2) Preparation of color paste: Titanium dioxide, iron oxide pigment, 0.2-0.4 parts aluminum hydroxide, 0.1-0.2 parts triethoxyoctylsilane, 3-5.8 parts polydimethylsiloxane, 1-2 parts polyglycerol-2 triisostearate, and 0.05-1 parts hydrogenated lecithin are mixed evenly and then ground at room temperature using a grinder to obtain a highly dispersed color paste for later use. Preferably, the grinder is used for 2-4 passes, with each pass lasting 15 minutes. As one embodiment, the titanium dioxide is CI 77891, and the amount used is 6-8 parts. The iron oxide pigment is a mixture of 0.7-0.9 parts CI 77492, 0.12-0.3 parts CI 77491, and 0.01-0.03 parts CI 77499. The amount of pigment raw materials can be flexibly adjusted according to the actual color number required by the product.

[0008] (3) Oil phase preparation: At room temperature, add 3-8 parts of trimethylsiloxysilicate, 1.4-1.8 parts of methyl polytrimethylsiloxane, 0.8-1 parts of polydimethylsiloxane, 0.8-1 parts of C13-15 alkyl, 0.5-1 parts of polyglycerol-2 triisostearate, 1-2 parts of PEG-10 polydimethylsiloxane, 0.8-1 parts of polydimethylsiloxane crosspolymer, 0.8-1 parts of acrylate / polytrimethylsiloxane methacrylate copolymer, and distearate to the oil phase pot. 0.5-1 parts of lithium methylammonium montmorillonite, 0.8-1 parts of sorbitan sesquioleate, 2-3 parts of PEG / PPG-18 / 18 polydimethylsiloxane, 0.3-1 parts of polydimethylsiloxane PEG-10 / 15 crosspolymer, 0.05-0.2 parts of tocopheryl acetate, 0.05-1 parts of propylene glycol carbonate, and 0.01-0.02 parts of pentaerythritol tetra(bis-tert-butylhydroxyhydrocinnamic acid) ester are stirred evenly; then the oleogel prepared in step (1) is added, and stirring is continued evenly. Preferably, the stirring conditions after adding the oleogel are: stirring at 600-800 rpm for 8-10 minutes at room temperature.

[0009] (4) Slowly add the color paste prepared in step (2) to the oil phase system prepared in step (3), and homogenize at high speed until the system is free of obvious particles and has a uniform color, and set aside for later use.

[0010] (5) Preparation of aqueous phase: At room temperature, add 3-5 parts of glycerol, 3-5 parts of butanediol, 1-3 parts of dipropylene glycol, 0.5-1.2 parts of magnesium sulfate, 0.5-1.2 parts of 1,2-hexanediol, 0.3-0.8 parts of octyl glycol, 0.1-0.3 parts of ethylhexylglycerin, 0.01-0.02 parts of tetrasodium pyrophosphate, 0.01-0.02 parts of sodium citrate, 0.01-0.02 parts of tocopherol, and water to the aqueous phase pot, and stir until all raw materials are completely dissolved to obtain a transparent and homogeneous aqueous phase system for later use; wherein the amount of water used is: based on 100 parts by weight of the total amount of cushion foundation formula, water is used to make up the balance.

[0011] (6) At room temperature, the aqueous phase system prepared in step (5) is slowly and uniformly added to the oil phase system obtained in step (4) for emulsification. At the same time, high-speed homogenization is started, and continuous stirring is carried out to ensure that the aqueous phase and oil phase are fully integrated to form a water-in-oil emulsion. Preferably, the aqueous phase system is added at a rate of 5 mL / min, the homogenization speed is 1200-1500 rpm, and the homogenization time is 8-12 minutes.

[0012] (7) Add 1.3-1.8 parts of silica to the emulsion obtained in step (6) while stirring. After stirring evenly, add 0.6-1 parts of isododecane and continue stirring to ensure that all raw materials are evenly dispersed. Sample and test the stability of the emulsified system. After the test is qualified, the anti-smudge and long-lasting cushion foundation is obtained by discharging.

[0013] Preferably, the amount of quaternary ammonium salt-90 bentonite is 0.8-1.2 parts, the amount of tea (CAMELLIA SINENSIS) leaf extract is 0.1-0.3 parts, and the amount of trimethylsiloxysilicate is 5-6 parts. As one embodiment, the amount of quaternary ammonium salt-90 bentonite is 1 part, the amount of tea (CAMELLIA SINENSIS) leaf extract is 0.2 parts, and the amount of trimethylsiloxysilicate is 5 parts.

[0014] The present invention also provides a non-smudge-proof and long-lasting cushion foundation, which is obtained by the above-described detailed preparation method.

[0015] The pre-activation step of the quaternary ammonium salt-90 bentonite and tea (CAMELLIA SINENSIS) leaf extract in this invention is key to achieving high viscosity, strong shear thinning, and excellent anti-scratching properties of the system. The tea extract is rich in polyphenols such as catechins and epigallocatechin gallate (EGCG), and its molecules contain a large number of catechol / pyrogallol structures (-OH), playing three key roles in the pre-activation process: First, hydrogen bond bridging activation, where the polyphenolic hydroxyl groups form a multi-layered hydrogen bond network with the silanol hydroxyl groups (Si-OH) on the surface of the bentonite sheets and the polar heads of the quaternary ammonium salt cations, weakening the van der Waals forces and electrostatic attraction between the bentonite sheets, thus promoting the complete exfoliation of the sheets into nanoscale (20-50 nm) single flakes; second, lipophilic modification and stable dispersion, where the aromaticity of the polyphenols... The aromatic ring structure is highly compatible with the oil phase medium, adsorbing onto the surface of bentonite nanosheets to form an organic-inorganic composite interface layer. This transforms the originally partially hydrophilic bentonite into a completely oleophilic one, solving the problem of poor compatibility between organosilicon and inorganic powders. This results in stable suspension, preventing agglomeration and making the film layer more dense and uniform. Thirdly, charge regulation and electrostatic anchoring are enhanced. The polyphenolic hydroxyl groups weakly dissociate in the oil phase, causing the bentonite sheet surface to carry a trace amount of negative charge, forming a charge balance with the positive charge of quaternary ammonium salt-90 bentonite, improving dispersion stability and strengthening the electrostatic anchoring effect between the subsequent film layer and the skin. After activation, the bentonite undergoes a qualitative change: the interlayer spacing increases, allowing oil phase molecules to fully enter the interlayer; the specific surface area increases, significantly increasing the number of interfacial interaction sites; the nanosheets form a preliminary three-dimensional card-house structure in the oil phase, forming a microscopic rigid framework in the system. Through a "crack deflection" mechanism, it resists frictional forces, laying the foundation for subsequent rheological network construction.

[0016] Trimethylsiloxane silicate is a low-Tg silicone resin that acts as a flexible continuous phase, forming a highly elastic hydrophobic film on the skin surface. It absorbs frictional energy, preventing brittleness and whitening, and blocks sebum and sweat, providing a flexible substrate for the composite film. Synergistically, it works with pre-activated quaternary ammonium salt-90 bentonite and tea (CAMELLIA SINENSIS) leaf extract to impart ultra-high static viscosity, ensuring a dense and stable film without component sedimentation. Simultaneously, the polyphenol-bentonite interfacial bonding gives the system extremely strong shear-thinning properties. During makeup application, the high shear force generated by the puff pressing and skin friction causes the system to instantly break down, resulting in a rapid drop in viscosity, spreading thinly and effortlessly like a liquid. After film formation, the shear force disappears, and the nanosheets instantly rebuild a three-dimensional network, quickly restoring the viscosity to a high value. The film rapidly sets, without shifting or smudging, achieving the ideal state of "thin upon application, long-lasting makeup." The extremely high thixotropic recovery rate (>95%) ensures that the network structure of the film layer is not permanently damaged under slight external forces (sweating, oil, expression lines), and can quickly rebound and repair itself, maintaining the integrity of the film layer and achieving long-lasting makeup.

[0017] The advantages of this invention are: This invention changes the traditional use of the three substances by pre-activating quaternary ammonium salt-90 bentonite with tea (CAMELLIASINENSIS) leaf extract, and then through the synergistic effect with trimethylsiloxysilicate, the film-forming mechanism of the cushion foundation system is completely different. By regulating the rheological properties of the system, a composite film layer with flexibility, rigidity and high adhesion is constructed, achieving a strong anti-smudge and long-lasting makeup effect while being thin and skin-friendly.

[0018] This invention provides a novel cushion foundation product and a premixed oil gel for its production, and provides a new pathway for the production of this product. Detailed Implementation

[0019] The specific embodiments provided by the present invention are described in detail below. This embodiment is implemented based on the technical solution of the present invention, and provides detailed implementation methods and processes. However, the scope of protection of the present invention is not limited to the following embodiments. The raw materials used in the embodiments and comparative examples are all commercially available products, the instruments used are all conventional equipment in the field, and the operating methods not mentioned are conventional methods in the field.

[0020] Example 1 The formulation composition, by weight (total 100 parts): methyl polytrimethylsiloxane 8.0; glycerin 5.0; polydimethylsiloxane 4.0; CI 77891 7.0; butanediol 5.0; C13-15 alkyl 4.0; polyglycerol-2 triisostearate 2.5; PEG-10 polydimethylsiloxane 2.0; dipropylene glycol 2.0; silica 1.5; magnesium sulfate 1.0; 1,2-hexanediol 0.8; isododecane 0.8; CI 77492 0.8; Polydimethylsiloxane crosspolymer 0.8; Acrylates / Polytrimethylsiloxane methacrylate copolymer 0.8; Distearate dimethylammonium lithium montmorillonite 0.5; Sorbitan sesquioleate 0.8; Octyl glycol 0.4; PEG / PPG-18 / 18 polydimethylsiloxane 2.0; Polydimethylsiloxane PEG-10 / 15 crosspolymer 0.3; Aluminum hydroxide 0.3; CI 77491 0.15; Triethoxyoctylsilane 0.2; Tocopheryl acetate 0.2; Ethylhexylglycerin 0.2; Hydrogenated lecithin 0.05; Propylene glycol carbonate 0.05; Pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester 0.02; CI 77499 0.02; Tetrasodium pyrophosphate 0.02; Sodium citrate 0.02; Tocopherol 0.01; Trimethylsiloxysilicate 8.0; Tea (Camellia sinensis) leaf extract 0.11; Quaternary ammonium salt-90; Bentonite 1.2; Balance water.

[0021] (1) Pre-activation of Quaternary Ammonium Salt-90 Bentonite with Tea (CAMELLIA SINENSIS) Leaf Extract: 80% by weight of methyl polytrimethylsiloxane and 80% by weight of C13-15 alkyl were stirred evenly (500 rpm, 5 min); then Quaternary Ammonium Salt-90 Bentonite was added and stirred (1000 rpm, 10 min) to make the Quaternary Ammonium Salt-90 Bentonite initially dispersed evenly; finally, tea (CAMELLIA SINENSIS) leaf extract was slowly added and stirred continuously to carry out the activation reaction (1000 rpm, 45 min) until the system was uniformly gelled, and the resulting oleogel was used for later use.

[0022] (2) Preparation of color paste: CI 77891, CI 77492, CI 77491, CI 77499, aluminum hydroxide, triethoxyoctylsilane, 80% by weight of polydimethylsiloxane, 80% by weight of polyglycerol-2 triisostearate, and hydrogenated lecithin are mixed evenly and then ground three times at room temperature using a grinder (15 min each time, 2000 rpm) to obtain a highly dispersed color paste for later use.

[0023] (3) Oil phase preparation: At room temperature, add trimethylsiloxysilicate, 20% by weight of methyl polytrimethylsiloxane, 20% by weight of polydimethylsiloxane, 20% by weight of C13-15 alkyl, 20% by weight of polyglycerol-2 triisostearate, PEG-10 polydimethylsiloxane, polydimethylsiloxane crosspolymer, acrylate / polytrimethylsiloxane methacrylate copolymer, distearate dimethylammonium lithium montmorillonite, and sorbitan sesquioleate to the oil phase pot. PEG / PPG-18 / 18 polydimethylsiloxane, polydimethylsiloxane PEG-10 / 15 crosspolymer, tocopheryl acetate, propylene glycol carbonate, pentaerythritol tetra(bis-tert-butylhydroxyhydrocinnamic acid) ester, stir evenly (600 rpm, stir for 8 min); then add the oleogel prepared in step (1), and continue to stir evenly (800 rpm, stir for 10 min) to ensure that the activated product and the oil phase raw material are completely integrated without clumping or layering.

[0024] (4) Slowly add the pigment prepared in step (2) to the oil phase system prepared in step (3), adjust the speed to 1200 rpm, homogenize at high speed for 5 min until there are no obvious particles in the system and the color is uniform, let stand for 5 min and there is no sedimentation, then set aside.

[0025] (5) Preparation of aqueous phase: At room temperature, add water, glycerol, butanediol, dipropylene glycol, magnesium sulfate, 1,2-hexanediol, octanediol, ethylhexylglycerol, tetrasodium pyrophosphate, sodium citrate and tocopherol to the aqueous phase pot, and stir (500 rpm, stirring for 10 min) until all raw materials are completely dissolved to obtain a transparent and homogeneous aqueous phase system for later use.

[0026] (6) At room temperature, the aqueous phase system prepared in step (5) is slowly and uniformly added to the oil phase system obtained in step (4) for emulsification. At the same time, high-speed homogenization (speed 1500 rpm) is turned on and homogenized for 12 min. During this period, continuous stirring is carried out to ensure that the aqueous phase and oil phase are fully integrated to form a water-in-oil emulsion.

[0027] (7) Add silica to the emulsion obtained in step (6) while stirring (600 rpm, stir for 8 min). After stirring evenly, add isododecane and continue stirring for 5 min to ensure that all raw materials are evenly dispersed, the system has a consistent texture, and there is no graininess. At room temperature, stir the emulsified system evenly (400 rpm, stir for 5 min). Sample the system to test its stability (no layering, no sedimentation, no coarsening after standing for 24 h). After passing the test, the anti-smudge long-lasting cushion foundation is obtained.

[0028] Example 2 Compared with Example 1, the amount of quaternary ammonium salt-90 bentonite was 1.0 part, the amount of tea (CAMELLIA SINENSIS) leaf extract was 0.2 parts, and the amount of trimethylsiloxysilicate was 5 parts. The activation reaction conditions in step (1) were: stirring at 800 rpm for 30 minutes at room temperature. The grinding in step (2) was performed 4 times, with each grinding lasting 15 minutes. The stirring conditions after adding the oleogel in step (3) were: stirring at 700 rpm for 9 minutes at room temperature. In step (6), the aqueous phase was added at a rate of 5 mL / min, the homogenization speed was 1400 rpm, and the homogenization time was 10 minutes.

[0029] The rest is the same as in Example 1.

[0030] Example 3 Compared with Example 1, the amount of quaternary ammonium salt-90 bentonite was 0.8 parts, the amount of tea (CAMELLIA SINENSIS) leaf extract was 0.3 parts, and the amount of trimethylsiloxysilicate was 6 parts. The activation reaction conditions in step (1) were: stirring at 500 rpm for 45 minutes at room temperature. The grinding in step (2) was carried out twice, with each grinding lasting 15 minutes. The stirring conditions after adding the oleogel in step (3) were: stirring at 600 rpm for 8 minutes at room temperature. In step (6), the aqueous phase was added at a rate of 5 mL / min, the homogenization speed was 1200 rpm, and the homogenization time was 9 minutes.

[0031] The rest is the same as in Example 1.

[0032] Example 4 Compared with Example 1, the amount of quaternary ammonium salt-90 bentonite was 1.5 parts, the amount of tea (CAMELLIA SINENSIS) leaf extract was 0.5 parts, and the amount of trimethylsiloxysilicate was 7 parts. The activation reaction conditions in step (1) were: stirring at 1000 rpm for 50 minutes at room temperature. The grinding in step (2) was performed 4 times, with each grinding lasting 15 minutes. The stirring conditions after adding the oleogel in step (3) were: stirring at 800 rpm for 10 minutes at room temperature. In step (6), the aqueous phase was added at a rate of 5 mL / min, the homogenization speed was 1500 rpm, and the homogenization time was 8 minutes.

[0033] The rest is the same as in Example 1.

[0034] Example 5 Compared with Example 1, the amount of quaternary ammonium salt-90 bentonite was 0.3 parts, the amount of tea (CAMELLIA SINENSIS) leaf extract was 0.05 parts, and the amount of trimethylsiloxysilicate was 3 parts. The activation reaction conditions in step (1) were: stirring at 700 rpm for 40 minutes at room temperature. The grinding in step (2) was performed 3 times, with each grinding lasting 15 minutes. The stirring conditions after adding the oleogel in step (3) were: stirring at 700 rpm for 9 minutes at room temperature. In step (6), the aqueous phase was added at a rate of 5 mL / min, the homogenization speed was 1300 rpm, and the homogenization time was 11 minutes.

[0035] The rest is the same as in Example 1.

[0036] Example 6 Compared to Example 1, the formulation composition, by weight (total 100 parts): methyl polytrimethylsiloxane 8.4; glycerol 5.0; polydimethylsiloxane 6.8; CI 77891 6.0; butanediol 4.0; C13-15 alkyl 4.4; polyglycerol-2 triisostearate 3.0; PEG-10 polydimethylsiloxane 2.0; dipropylene glycol 3.0; silica 1.8; magnesium sulfate 1.2; 1,2-hexanediol 1.0; isododecane 1.0; CI 77492 0.9; Polydimethylsiloxane crosspolymer 1.0; Acrylates / Polytrimethylsiloxane methacrylate copolymer 0.8; Distearate dimethylammonium lithium montmorillonite 0.6; Sorbitan sesquioleate 0.9; Octyl glycol 0.8; PEG / PPG-18 / 18 polydimethylsiloxane 2.0; Polydimethylsiloxane PEG-10 / 15 crosspolymer 0.5; Aluminum hydroxide 0.4; CI 77491 0.3; Triethoxyoctylsilane 0.1; Tocopheryl acetate 0.15; Ethylhexylglycerin 0.2; Hydrogenated lecithin 0.1; Propylene glycol carbonate 0.25; Pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester 0.02; CI 77499 0.03; Tetrasodium pyrophosphate 0.01; Sodium citrate 0.02; Tocopherol 0.02; Trimethylsiloxysilicate 8.0; Tea (Camellia sinensis) leaf extract 0.11; Quaternary ammonium salt-90; Bentonite 1.2; Balance water.

[0037] The rest is the same as in Example 1.

[0038] Example 7 Compared to Example 1, the formulation composition, by weight (total 100 parts): methyl polytrimethylsiloxane 7.2; glycerol 4.0; polydimethylsiloxane 3.8; CI 77891 8.0; butanediol 3.0; C13-15 alkyl 3.8; polyglycerol-2 triisostearate 2.0; PEG-10 polydimethylsiloxane 1.5; dipropylene glycol 2.5; silica 1.6; magnesium sulfate 0.8; 1,2-hexanediol 1.2; isododecane 0.7; CI 77492 0.7; Polydimethylsiloxane crosspolymer 0.8; Acrylates / Polytrimethylsiloxane methacrylate copolymer 0.9; Distearate dimethylammonium lithium montmorillonite 1.0; Sorbitan sesquioleate 1.0; Octyl glycol 0.5; PEG / PPG-18 / 18 polydimethylsiloxane 3.0; Polydimethylsiloxane PEG-10 / 15 crosspolymer 0.8; Aluminum hydroxide 0.2; CI 77491 0.1; Triethoxyoctylsilane 0.15; Tocopheryl acetate 0.2; Ethylhexylglycerin 0.1; Hydrogenated lecithin 1.0; Propylene glycol carbonate 1.0; Pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester 0.02; CI 77499 0.01; Tetrasodium pyrophosphate 0.02; Sodium citrate 0.01; Tocopherol 0.02; Trimethylsiloxysilicate 8.0; Tea (Camellia sinensis) leaf extract 0.11; Quaternary ammonium salt-90; Bentonite 1.2; Balance water.

[0039] The rest is the same as in Example 1.

[0040] Example 8 Compared to Example 1, the formulation composition, by weight (total 100 parts): methyl polytrimethylsiloxane 7.8; glycerol 3.0; polydimethylsiloxane 5.5; CI 77891 7.5; butanediol 4.5; C13-15 alkyl 4.2; polyglycerol-2 triisostearate 1.5; PEG-10 polydimethylsiloxane 1.0; dipropylene glycol 1.0; silica 1.3; magnesium sulfate 0.5; 1,2-hexanediol 0.5; isododecane 0.6; CI 77492 0.8; Polydimethylsiloxane crosspolymer 0.9; Acrylates / Polytrimethylsiloxane methacrylate copolymer 1.0; Distearate dimethylammonium lithium montmorillonite 0.8; Sorbitan sesquioleate 0.8; Octyl glycol 0.3; PEG / PPG-18 / 18 polydimethylsiloxane 2.5; Polydimethylsiloxane PEG-10 / 15 crosspolymer 1.0; Aluminum hydroxide 0.3; CI 77491 0.12; Triethoxyoctylsilane 0.2; Tocopheryl acetate 0.05; Ethylhexylglycerin 0.3; Hydrogenated lecithin 0.5; Propylene glycol carbonate 0.5; Pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester 0.01; CI 77499 0.02; Tetrasodium pyrophosphate 0.02; Sodium citrate 0.01; Tocopherol 0.01; Trimethylsiloxysilicate 8.0; Tea (Camellia sinensis) leaf extract 0.11; Quaternary ammonium salt-90; Bentonite 1.2; Balance water.

[0041] The rest is the same as in Example 1.

[0042] Comparative Example 1 Compared with Example 1, Quaternary ammonium salt-90 bentonite and tea (CAMELLIA SINENSIS) leaf extract were not pre-activated and were added directly in step (3) along with methyl polytrimethylsiloxane and C13-15 alkyl.

[0043] The rest is the same as in Example 1.

[0044] Comparative Example 2 Compared with Example 1, the raw materials did not use Quaternary Ammonium Salt-90 Bentonite, and the tea (CAMELLIA SINENSIS) leaf extract, along with methyl polytrimethylsiloxane and C13-15 alkyl, were directly added in step (3).

[0045] The rest is the same as in Example 1.

[0046] Comparative Example 3 Compared with Example 1, tea (CAMELLIA SINENSIS) leaf extract was not used as raw material, and quaternary ammonium salt-90 bentonite, along with methyl polytrimethylsiloxane and C13-15 alkyl, were added directly in step (3).

[0047] The rest is the same as in Example 1.

[0048] Comparative Example 4 Compared with Example 1, the raw materials did not use Quaternary ammonium salt-90 bentonite and tea (CAMELLIA SINENSIS) leaf extract, and 80% by weight of methyl polytrimethylsiloxane and C13-15 alkyl were added directly in step (3).

[0049] The rest is the same as in Example 1.

[0050] Comparative Example 5 Compared to Example 1, trimethylsiloxysilicate was not used as the raw material.

[0051] The rest is the same as in Example 1.

[0052] Comparative Example 6 Compared to Example 1, the raw materials did not include trimethylsiloxysilicate, quaternary ammonium salt-90 bentonite, and tea (CAMELLIA SINENSIS) leaf extract. 80% by weight of methyl polytrimethylsiloxane and C13-15 alkyl from step (1) were added directly in step (3).

[0053] The rest is the same as in Example 1.

[0054] Comparative Example 7 Compared to Example 1, the amount of trimethylsiloxysilicate used was 12 parts.

[0055] The rest is the same as in Example 1.

[0056] Comparative Example 8 Compared with Example 1, the amount of Quaternary Ammonium Salt-90 Bentonite was 1.5 parts and the amount of Camellia sinensis Leaf Extract was 1.2 parts.

[0057] The rest is the same as in Example 1.

[0058] Performance testing 1. Anti-scratch performance: D-value comprehensive evaluation method Sample preparation: Cut the artificial leather into 20cm × 10cm pieces and fix them onto a flat surface. Apply approximately 0.1g of sample evenly to a 10cm × 12cm area in the center of the artificial leather, to a thickness of 0.05 micrometers. Let it sit at room temperature for 2 hours to allow the film to dry completely.

[0059] Friction treatment: Using a weighted device, the friction head is wrapped in cotton cloth (or medical mask material) to completely cover the surface of the foundation. Parameters are set: load 100g, friction speed 30 times / minute, 5 reciprocating cycles. The resulting artificial leather is collected for image analysis.

[0060] Image acquisition and analysis: Use a camera to capture images of the rubbed artificial leather under D65 standard lighting. Import the images into the image analysis software Adobe Photoshop.

[0061] Formula for calculating the overall difference D: ; in, : Average brightness before and after friction; : Average values ​​of the three color channels before and after rubbing. The smaller the D value, the better the anti-smudge effect, and it can quantify the slight differences in makeup fading.

[0062] 2. Rheological properties The static viscosity (0.1 rpm), dynamic viscosity (100 rpm), and shear thinning index (n) of the sample were tested using a rotational rheometer. The specific test conditions were: 25℃, test time 10 min, and shear rate 0.1-100 rpm, to verify the effect of pre-activation on the rheological properties of the system.

[0063] 3. Human sensory testing We are recruiting 30 healthy female volunteers, aged 25-45, with skin types including dry, oily, and combination.

[0064] Test Method: Half-face control test. After cleansing the face, the patient sat quietly for 30 minutes in a constant temperature and humidity room (25℃, RH50%) to acclimatize. The sample from the example was applied to the left cheek, and the control sample to the right cheek, with an amount of 0.1g for each. The product was then evenly patted on using a cushion puff. The first evaluation was conducted 10 minutes after application.

[0065] Subjective evaluation, subject self-assessment (0-10 points): Makeup integrity after friction (0 = completely destroyed, 10 = no change) Skin-adhering feel (0 = powdery, 10 = very skin-adhering) Comfort level (0 = tight / heavy, 10 = light and comfortable) Blind evaluation by professional assessors (0-10 points): Evaluate the completeness of the makeup based on the photos.

[0066] The D-value and rheological properties of the anti-scratch performance are shown in Table 1. The results of the human sensory test are shown in Table 2.

[0067]

[0068]

[0069] Table 1 shows that the product of Example 1 has a D value of 2.4, exhibiting the best anti-scratch performance compared to all comparative examples, and the lowest shear thinning index (0.22), proving that pre-activation treatment combined with the optimal ratio can achieve the best rheological properties and anti-scratch effect. Comparative Example 1 only added Quaternium-90 bentonite and tea extract using conventional methods without pre-activation treatment. Comparative Examples 2, 3, and 4 did not use Quaternium-90 bentonite and tea (CAMELLIA SINENSIS) leaf extract or one of them. Comparative Example 6 did not use any of the three key substances. As a result, the static viscosity was much lower than that of Example 1, with the D value of Comparative Example 6 reaching over 600, indicating extremely poor anti-scratch performance. Comparative Example 5, due to the absence of trimethylsiloxysilicate but the use of a premixed oleogel of bentonite and tea extract, had a certain static viscosity but poor anti-scratch performance. Comparative Examples 7 and 8, due to the pre-activation of bentonite and tea extract, exhibited better static viscosity and D-value. However, the excessive use of the three key substances resulted in poorer overall performance compared to Example 1. This indicates that more of the three key substances is not necessarily better; a suitable dosage ratio is required for synergistic effects. The dosage range of the three key substances, determined through extensive experimental screening, is crucial for achieving optimal synergy between rheological properties and anti-scratch performance.

[0070] The lower the shear thinning index (n), the higher the thixotropic recovery rate; the smaller the D value, the better the anti-scratching performance. The correlation coefficient R² > 0.95, proving that rheological properties are the direct determinant of anti-scratching performance. Whether bentonite and tea extract are pre-activated is the key means to regulate rheological properties and has a significant impact on rheological properties.

[0071] As shown in Table 2, Example 1 achieved the highest scores in makeup integrity, skin adhesion, comfort, smoothness of application, and setting speed. This demonstrates that the strong shear-thinning property makes the product lightweight and smooth during application, while the rapid thixotropic recovery ensures fast setting. In contrast, Comparative Example 1 (unactivated) and Comparative Example 2 (lacking key substances) exhibited poor rheological properties, resulting in low scores for smoothness of application and setting speed. They also showed issues such as heaviness, difficulty in spreading, and slow setting, proving that pre-activation treatment can achieve a balance between "long-lasting makeup and lightweight skin feel."

[0072] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention.

Claims

1. A premixed oil gel for use in anti-smudge and long-lasting cushion foundation, characterized in that, The raw materials used, by weight, include 0.3-1.5 parts of Quaternium-90 bentonite and 0.05-0.5 parts of Camellia sinensis leaf extract for pre-activation treatment. The preparation steps include: stirring 5.8-6.6 parts of methyl polytrimethylsiloxane and 3-3.4 parts of C13-15 alkyl evenly; then adding Quaternium-90 bentonite and continuing to stir to initially disperse the Quaternium-90 bentonite evenly; finally, slowly adding Camellia sinensis leaf extract and continuing to stir to carry out the activation reaction until the system is in a uniform gel state, thus obtaining the premixed oleogel.

2. The premixed oil gel for anti-smudge and long-lasting cushion foundation according to claim 1, characterized in that, The activation reaction conditions are: stirring at 500-1000 rpm for 30-50 minutes at room temperature.

3. A method for preparing a non-smudge-proof, long-lasting cushion foundation, characterized in that, The following steps are included, and the raw materials used are in parts by weight: (1) Preparation of the premixed oleogel according to claim 1 or claim 2, for later use; (2) Preparation of color paste: Titanium dioxide, iron oxide color powder, aluminum hydroxide 0.2-0.4 parts, triethoxyoctylsilane 0.1-0.2 parts, polydimethylsiloxane 3-5.8 parts, polyglycerol-2 triisostearate 1-2 parts, hydrogenated lecithin 0.05-1 parts are mixed evenly and then ground at room temperature using a grinder to obtain a highly dispersed color paste for later use; (3) Oil phase preparation: At room temperature, add 3-8 parts of trimethylsiloxysilicate, 1.4-1.8 parts of methyl polytrimethylsiloxane, 0.8-1 parts of polydimethylsiloxane, 0.8-1 parts of C13-15 alkyl, 0.5-1 parts of polyglycerol-2 triisostearate, 1-2 parts of PEG-10 polydimethylsiloxane, 0.8-1 parts of polydimethylsiloxane crosspolymer, 0.8-1 parts of acrylate / polytrimethylsiloxane methacrylate copolymer, and distearate dimethylammonium to the oil phase pot. 0.5-1 parts of lithium montmorillonite, 0.8-1 parts of sorbitan sesquioleate, 2-3 parts of PEG / PPG-18 / 18 polydimethylsiloxane, 0.3-1 parts of polydimethylsiloxane PEG-10 / 15 crosspolymer, 0.05-0.2 parts of tocopheryl acetate, 0.05-1 parts of propylene glycol carbonate, and 0.01-0.02 parts of pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester are stirred evenly; then the premixed oleogel prepared in step (1) is added and stirred evenly again. (4) Slowly add the color paste prepared in step (2) to the oil phase system prepared in step (3), and homogenize at high speed until the system is free of obvious particles and has a uniform color, and set aside for later use; (5) Aqueous phase preparation: At room temperature, add 3-5 parts of glycerol, 3-5 parts of butanediol, 1-3 parts of dipropylene glycol, 0.5-1.2 parts of magnesium sulfate, 0.5-1.2 parts of 1,2-hexanediol, 0.3-0.8 parts of octyl glycol, 0.1-0.3 parts of ethylhexylglycerin, 0.01-0.02 parts of tetrasodium pyrophosphate, 0.01-0.02 parts of sodium citrate, 0.01-0.02 parts of tocopherol, and water to the aqueous phase pot, and stir until all raw materials are completely dissolved to obtain a transparent and homogeneous aqueous phase system for later use; wherein the amount of water used is: based on 100 parts by weight of the total amount of cushion foundation formula, water is used to make up the balance; (6) At room temperature, the aqueous phase system prepared in step (5) is slowly and uniformly added to the oil phase system obtained in step (4) for emulsification. At the same time, high-speed homogenization is turned on, and continuous stirring is carried out to ensure that the aqueous phase and oil phase are fully integrated to form a water-in-oil emulsion. (7) Add 1.3-1.8 parts of silica to the emulsion obtained in step (6) while stirring. After stirring evenly, add 0.6-1 parts of isododecane and continue stirring to ensure that all raw materials are evenly dispersed. Sample and test the stability of the emulsified system. After the test is qualified, the anti-smudge and long-lasting cushion foundation is obtained by discharging.

4. The method for preparing the anti-smudge and long-lasting cushion foundation according to claim 3, characterized in that, The titanium dioxide mentioned in step (2) is CI 77891, and the amount is 6-8 parts. The iron oxide pigment is a mixture of 0.7-0.9 parts of CI 77492, 0.12-0.3 parts of CI 77491 and 0.01-0.03 parts of CI 77499.

5. The method for preparing the anti-smudge and long-lasting cushion foundation according to claim 3, characterized in that, The grinding machine described in step (2) grinds 2-4 times, with each grinding session lasting 15 minutes.

6. The method for preparing the anti-smudge and long-lasting cushion foundation according to claim 3, characterized in that, The stirring conditions after adding the premixed oleogel in step (3) are: stirring at 600-800 rpm for 8-10 minutes at room temperature.

7. The method for preparing the anti-smudge and long-lasting cushion foundation according to claim 3, characterized in that, In step (6), the aqueous phase system is added at a rate of 5 mL / min, the homogenization speed is 1200-1500 rpm, and the homogenization time is 8-12 minutes.

8. The method for preparing the anti-smudge and long-lasting cushion foundation according to claim 3, characterized in that, The amount of quaternary ammonium salt-90 bentonite is 0.8-1.2 parts, the amount of tea (CAMELLIA SINENSIS) leaf extract is 0.1-0.3 parts, and the amount of trimethylsiloxysilicate is 5-6 parts.

9. The method for preparing the anti-smudge and long-lasting cushion foundation according to claim 8, characterized in that, The amount of quaternary ammonium salt-90 bentonite used is 1 part, the amount of tea (CAMELLIA SINENSIS) leaf extract used is 0.2 parts, and the amount of trimethylsiloxysilicate used is 5 parts.

10. A smudge-proof, long-lasting cushion foundation, characterized in that, It is obtained by the preparation method according to any one of claims 3-9.

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