Oil-control makeup-fixing microsphere with soft focus effect as well as preparation method and product of oil-control makeup-fixing microsphere

Abstract

The invention provides an oil-control makeup-fixing microsphere with a soft-focus effect as well as a preparation method and a product of the oil-control makeup-fixing microsphere, and relates to the technical field of cosmetics. The oil-controlling and makeup-fixing microsphere is prepared from the following raw material components in parts by weight: 70 to 98 parts of silica, 1 to 15 parts of calcium carbonate and 1 to 15 parts of trimethylsiloxy silicate ester. The preparation method of the oil-control makeup-fixing microspheres comprises the following steps: mixing the components, uniformly stirring with ethanol, heating and mixing, homogenizing, and spray-drying to obtain the oil-control makeup-fixing microspheres. The honeycomb hydrophobic silica brings a long-acting oil control effect; calcium carbonate is used as soft-focus particles, so that the concealing capability is remarkably improved; trimethylsiloxy silicate ester is used as a makeup locking film layer; all the components are matched with one another, so that the obvious effects of softening focus, controlling oil and fixing makeup are achieved. The oil-controlling and makeup-fixing microsphere is applied to preparation of cosmetics, and is remarkable in makeup-fixing and oil-controlling effects and good in use feeling.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to an oil-controlling and makeup-setting microsphere with a soft-focus effect, its preparation method, and the product thereof. Background Technology

[0002] In daily life, human skin naturally secretes oil. For people who wear makeup, excessive sebum secretion can cause makeup to lose its luster and even lead to problems such as makeup coming off or smudging. Therefore, an important function of setting makeup products is to control oil in order to maintain the longevity and freshness of the makeup.

[0003] Traditional setting products often achieve oil control by adding oil-absorbing powder. Silica's high specific surface area and porous properties give it strong oil control capabilities, making it widely used in cosmetic formulations. However, silica's makeup-holding power significantly decreases in high temperature and high humidity environments. The main reason is that silica can only temporarily absorb oil and cannot prevent makeup from shifting due to sebum secretion, thus failing to guarantee the stability and durability of the makeup.

[0004] Silica itself is a transparent or translucent inorganic substance that lacks the ability to cover or color. Although it can achieve a certain soft-focus effect by diffusely scattering light, its concealing effect is still relatively weak. Some studies have explored the formulation of silica and film-forming agents to improve hydrophobic properties and prolong makeup wear time. Chinese invention patent CN114224747A discloses a modified powder and its preparation method, and also discloses cosmetics including the modified powder; the modified powder is obtained by mixing a base powder with a particle size of 20nm-6000nm with a solution containing a film-forming agent, wherein the mass fraction of the film-forming agent in the solution is 50%-75%, the viscosity of the solution is 5mPa·s-400mPa·s, and the mass of the film-forming agent is 0.5%-10% of the mass of the base powder; wherein the film-forming agent includes at least one of trimethylsiloxysilicate, polymethylsilsesquioxane, polypropylsilsesquioxane, acrylate / polytrimethylsiloxane methacrylate copolymer, acrylate / polydimethylsiloxane copolymer, diphenylsiloxyphenyl polytrimethylsiloxane, or polyvinylpyrrolidone / hexadecene copolymer. This modified powder can be evenly dispersed in cosmetics, exhibiting good compatibility and giving the cosmetics both excellent stability and long-lasting wear. However, the modified powder has relatively weak oil-absorbing properties.

[0005] Chinese invention patent CN116459173A discloses a microchannel-type water-oil balancing breathable makeup-holding cosmetic additive and cosmetic product. The cosmetic additive includes the following components: trimethylsiloxysilicate, volatile oils with a total carbon count of less than 22, non-volatile plant oils, silicone surfactants, and polyglycerol surfactants. This invention, under the action of the above components, can form a large number of breathable pores on a hard film formed by silicone resin, increasing breathability. However, optical studies show that its turbidity is high, easily causing mask-like effects; and although it can improve concealing power, its oil-absorbing effect still needs improvement.

[0006] In addition, the current simple physical mixing of silica and film-forming agents may result in uneven distribution, easy makeup removal and patchiness after application, poor oil absorption and weak makeup setting ability, and unpleasant powdery and sticky texture. Summary of the Invention

[0007] This invention addresses the problems existing in the prior art by providing an oil-controlling and makeup-setting microsphere with a soft-focus effect, as well as its preparation method and product. It involves mixing honeycomb hydrophobic silica, calcium carbonate, and trimethylsiloxysilicate in specific proportions and preparation methods to obtain a three-layer microsphere structure that offers superior oil control, concealing soft-focus effects, and strong makeup-holding power.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: First, the present invention provides an oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components including, by weight: 70-98 parts of silica, 1-15 parts of calcium carbonate and 1-15 parts of trimethylsiloxysilicate.

[0009] Preferably, the oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 80-90 parts silica, 2-13 parts calcium carbonate, and 2-13 parts trimethylsiloxysilicate.

[0010] More preferably, the oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 80-85 parts silica, 2-13 parts calcium carbonate, and 2-13 parts trimethylsiloxysilicate.

[0011] More preferably, the oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 84-85 parts silica, 2-13 parts calcium carbonate, and 2-13 parts trimethylsiloxysilicate.

[0012] More preferably, the oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 80-90 parts silica, 5-10 parts calcium carbonate, and 5-10 parts trimethylsiloxysilicate.

[0013] More preferably, the oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 84 parts silica, 8 parts calcium carbonate, and 8 parts trimethylsiloxysilicate.

[0014] In some specific embodiments of the present invention, the oil-controlling and makeup-setting microspheres have a weight ratio of raw material components that includes any endpoint value, any intermediate point value, or any range value of the weight ratio of the above-mentioned components, for example: The oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 84 parts silica, 8 parts calcium carbonate, and 8 parts trimethylsiloxysilicate.

[0015] The oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 80 parts silica, 10 parts calcium carbonate, and 10 parts trimethylsiloxysilicate.

[0016] The oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 90 parts silica, 5 parts calcium carbonate, and 5 parts trimethylsiloxysilicate.

[0017] The oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 85 parts silica, 13 parts calcium carbonate, and 2 parts trimethylsiloxysilicate.

[0018] The oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 85 parts silica, 2 parts calcium carbonate, and 13 parts trimethylsiloxysilicate.

[0019] The oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 70 parts silica, 15 parts calcium carbonate, and 15 parts trimethylsiloxysilicate.

[0020] The oil-controlling and makeup-setting microspheres contain the following raw material components by weight: 98 parts silica, 1 part calcium carbonate, and 1 part trimethylsiloxysilicate.

[0021] Preferably, the silica is honeycomb-shaped hydrophobic silica with a particle size of 4-12 μm.

[0022] More preferably, the silica has a particle size of 4-8 μm; even more preferably, it has a particle size of 4-5 μm.

[0023] More preferably, the specific surface area of ​​the silica is 80-90 cm². 2 g.

[0024] Furthermore, the specific surface area of ​​the silica is 87.0596 ± 0.5396 cm². 2 / g.

[0025] Then, the present invention provides a method for preparing the above-mentioned oil-controlling and makeup-setting microspheres, comprising the steps of: stirring silica, calcium carbonate and trimethylsiloxysilicate with ethanol until uniform, heating and mixing, homogenizing, and spray drying to obtain oil-controlling and makeup-setting microspheres.

[0026] Preferably, the preparation method includes the following steps: (1) Stir silica and calcium carbonate with ethanol, then add trimethylsiloxysilicate, heat and mix to obtain a mixed slurry; (2) The mixed slurry is homogenized to obtain a homogeneous mixed solution; (3) The homogeneous mixed solution is spray-dried and then spray-spheroidized to obtain oil-controlling and makeup-setting microspheres.

[0027] More preferably, in step (1), the ethanol is anhydrous ethanol.

[0028] More preferably, in step (1), the amount of ethanol used is 1.5-3 times the total mass of silica, calcium carbonate and trimethylsiloxysilicate.

[0029] More preferably, in step (1), the amount of ethanol used is twice the total mass of silica, calcium carbonate and trimethylsiloxysilicate.

[0030] More preferably, in step (1), the stirring speed is 1000-2000 r / min.

[0031] More preferably, in step (1), the stirring speed is 1000-1500 r / min.

[0032] More preferably, in step (1), the heating and mixing specifically involves heating to 50-70°C and holding for 20-30 minutes.

[0033] More preferably, in step (1), the heating and mixing specifically involves heating to 60-70°C and holding for 30 minutes.

[0034] More preferably, in step (2), the homogenization process specifically involves performing homogenization 2-5 times at a pressure of 10000-20000psi, each time for 1-5 minutes.

[0035] More preferably, in step (2), the homogenization process specifically involves performing homogenization 3-4 times at a pressure of 10000-15000psi, each time for 4-5 minutes.

[0036] More preferably, in step (3), the spray drying specifically involves an inlet temperature of 100-180°C and an outlet temperature of 50-80°C.

[0037] More preferably, in step (3), the spray drying specifically involves an inlet temperature of 100-180°C and an outlet temperature of 50-70°C.

[0038] More preferably, in step (3), the spray drying specifically involves an inlet temperature of 100°C and an outlet temperature of 50°C.

[0039] Finally, the present invention provides a cosmetic product comprising the above-mentioned oil-controlling and makeup-setting microspheres.

[0040] Preferably, the cosmetic includes setting powder.

[0041] Compared with the prior art, the present invention has the following beneficial effects: 1. The oil-controlling and makeup-setting microspheres of the present invention have a three-layer microsphere structure: honeycomb hydrophobic silica provides a long-lasting oil-controlling effect; calcium carbonate, as a soft-focus particle, significantly improves the concealing ability; and trimethylsiloxysilicate, as a makeup-locking film layer; under the interaction of the above three components, a synergistic and superior soft-focusing, oil-controlling, and makeup-setting effect is achieved.

[0042] 2. In the oil-controlling and makeup-setting microspheres of the present invention, the oil-soluble film-forming agent trimethylsiloxysilicate serves as the outermost coating material. It can cross-link with the oil on the skin surface through siloxane bonds to form a rigid, high-density mesh film that closely adheres to the skin. At the same time, the silica in the inner layer absorbs excess oil and quickly forms a film, rapidly setting the shape and fixing the silica and calcium carbonate to the skin surface, achieving a fast and long-lasting makeup-setting effect.

[0043] 3. In the oil-controlling and makeup-setting microspheres of the present invention, the silica is honeycomb silica with a porous structure inside, which can efficiently absorb sebum, sweat and excess oil; combined with the high refractive index of the calcium carbonate layer, it can gently scatter light, improve physical coverage, weaken the visibility of pores and fine lines, improve the natural soft-focus effect, and make up for the shortcomings of insufficient concealing of silica. At the same time, the surface of the calcium carbonate particles has a microporous structure, which can work with silica. Silica quickly absorbs skin oil, and calcium carbonate provides additional adsorption capacity, prolonging the oil control time.

[0044] 4. In the preparation method of the oil-controlling and makeup-setting microspheres of the present invention, honeycomb silica, calcium carbonate, and trimethylsiloxysilicate are spray-dried and spheroidized in a copolymer liquid phase to form a stable and uniform composite structure. The microspheres prepared by this non-simple physical mixing and co-processing can avoid the disadvantage of uneven composition, ensure the functional consistency of each microsphere, and thus improve the makeup-holding ability.

[0045] 5. In the oil-controlling and makeup-setting microspheres of this invention, the silica particle size ranges from 4-12 μm. Within this particle size range, the continuity and uniformity of the film-forming agent's coating are improved. Due to the high surface energy of small-diameter particles, the film-forming agent will preferentially fill the pores during coating, resulting in poor continuity of the film-forming agent coating layer. When the particle size is too large, the particle curvature radius is large, making it easier for uneven coating layer thickness to occur. However, this invention uses silica with a specific particle size for coating, resulting in more uniform makeup setting, high uniformity, fast oil absorption, no whitening, and higher transparency. Attached Figure Description

[0046] Figure 1 This is a particle size distribution diagram of the oil-controlling and makeup-setting microspheres in Example 1.

[0047] Figure 2 This is an electron microscope image of honeycomb-shaped hydrophobic silica.

[0048] Figure 3 This is an electron micrograph of the oil-controlling and makeup-setting microspheres from Example 1. Detailed Implementation

[0049] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the invention in any way. The following content is merely an exemplary description of the scope of protection claimed by the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, and such changes should also fall within the scope of protection claimed by the present invention.

[0050] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in the invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0051] The present invention will be further described below by way of specific embodiments. Unless otherwise specified, all chemical reagents used in the embodiments of the present invention are obtained through conventional commercial means.

[0052] In the following embodiments, the honeycomb hydrophobic silica was purchased from Yangrun Technology (Guangdong) Co., Ltd., product number Sensation KP-107C; the calcium carbonate was purchased from Yangrun Technology (Guangdong) Co., Ltd., product number CMC-130; the trimethylsiloxysilicate was purchased from Yangrun Technology (Guangdong) Co., Ltd., product number Sensation AT-6803; and the spherical silica was purchased from Yangrun Technology (Guangdong) Co., Ltd., product number Sensation SC-104. Products from different manufacturers do not have a significant impact on the effect.

[0053] Basic Example 1 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight include: 70-98 parts of silica, 1-15 parts of calcium carbonate and 1-15 parts of trimethylsiloxysilicate; The silica is a honeycomb-shaped hydrophobic silica with a particle size of 4-12 μm and a specific surface area of ​​80-90 cm². 2 / g; The preparation method of oil-controlling and makeup-setting microspheres includes the following steps: (1) Stir silica and calcium carbonate with ethanol at a speed of 1000-2000 r / min until homogeneous, then add trimethylsiloxysilicate, mix, heat to 50-70℃, keep warm for 20-30 min, and obtain a mixed slurry; The mass of ethanol used is 1.5-3 times the total mass of silica, calcium carbonate, and trimethylsiloxysilicate. (2) The mixed slurry is homogenized 2-5 times at a pressure of 10,000-20,000 psi, each time for 1-5 min, to obtain a homogeneous mixed solution; (3) The homogeneous mixed solution is spray-dried at an inlet temperature of 100-180℃ and an outlet temperature of 50-80℃. After the above spray spheroidization treatment, oil-controlling and makeup-setting microspheres with a particle size of 4-13μm are obtained.

[0054] Example 1 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight are: 84 parts of honeycomb hydrophobic silica (4-5μm), 8 parts of calcium carbonate and 8 parts of trimethylsiloxysilicate.

[0055] The preparation method of oil-controlling and makeup-setting microspheres is as follows: (1) Silica and calcium carbonate are stirred evenly with 200 parts by weight of ethanol at a speed of 1500 r / min, then trimethylsiloxysilicate is added, mixed, heated to 60℃, and kept warm for 30 min to obtain a mixed slurry; (2) Using a high-pressure homogenizer, the mixed slurry was homogenized three times at a pressure of 15000psi, each time for 5 minutes, to obtain a homogenized mixed solution; (3) The homogeneous mixed solution is spray-dried at an inlet temperature of 100°C and an outlet temperature of 50°C. After the above spray spheroidization treatment, oil-controlling and makeup-setting microspheres are obtained.

[0056] Example 2 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight are: 90 parts of honeycomb hydrophobic silica (4-5μm), 5 parts of calcium carbonate and 5 parts of trimethylsiloxysilicate.

[0057] The preparation method of the oil-controlling and makeup-setting microspheres is the same as in Example 1.

[0058] Example 3 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight are: 85 parts of honeycomb hydrophobic silica (4-5μm), 2 parts of calcium carbonate and 13 parts of trimethylsiloxysilicate.

[0059] The preparation method of oil-controlling and makeup-setting microspheres is as follows: (1) Silica and calcium carbonate are stirred evenly with 200 parts by weight of ethanol at a speed of 1000 r / min, then trimethylsiloxysilicate is added, mixed, heated to 70℃, and kept warm for 30 min to obtain a mixed slurry; (2) Using a high-pressure homogenizer, the mixed slurry was homogenized 4 times at a pressure of 10000psi, each time for 5 minutes, to obtain a homogenized mixed solution; (3) The homogeneous mixed solution is spray-dried at an inlet temperature of 140°C and an outlet temperature of 60°C. After the above spray spheroidization treatment, oil-controlling and makeup-setting microspheres are obtained.

[0060] Example 4 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight are: 85 parts of honeycomb hydrophobic silica (4-5μm), 13 parts of calcium carbonate and 2 parts of trimethylsiloxysilicate.

[0061] The preparation method of oil-controlling and makeup-setting microspheres is as follows: (1) Silica and calcium carbonate are stirred evenly with 200 parts by weight of ethanol at a speed of 1000 r / min, then trimethylsiloxysilicate is added, mixed, heated to 50℃, and kept at the temperature for 30 min to obtain a mixed slurry; (2) Using a high-pressure homogenizer, the mixed slurry was homogenized three times at a pressure of 10,000 psi, each time for 5 minutes, to obtain a homogenized mixed solution; (3) The homogeneous mixed solution is spray-dried at an inlet temperature of 180°C and an outlet temperature of 70°C. After the above spray spheroidization treatment, oil-controlling and makeup-setting microspheres are obtained.

[0062] Example 5 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight are: 80 parts of honeycomb hydrophobic silica (4-5μm), 10 parts of calcium carbonate and 10 parts of trimethylsiloxysilicate.

[0063] The preparation method of the oil-controlling and makeup-setting microspheres is the same as in Example 1.

[0064] Example 6 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight are: 70 parts of honeycomb hydrophobic silica (4-5μm), 15 parts of calcium carbonate and 15 parts of trimethylsiloxysilicate.

[0065] The preparation method of the oil-controlling and makeup-setting microspheres is the same as in Example 1.

[0066] Example 7 A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, the raw material components by weight are: 98 parts of honeycomb hydrophobic silica (4-5μm), 1 part of calcium carbonate and 1 part of trimethylsiloxysilicate.

[0067] The preparation method of the oil-controlling and makeup-setting microspheres is the same as in Example 1.

[0068] Comparative Example 1 Unlike Example 1, the preparation method of the oil-controlling and makeup-setting microspheres is different. The method in this comparative example is simply physical mixing, and the specific steps are as follows: Silica, calcium carbonate, and trimethylsiloxysilicate were stirred evenly at a speed of 1500 r / min to obtain oil-controlling and makeup-setting microspheres.

[0069] Comparative Example 2 Unlike Example 1, the raw material composition of the oil-controlling and makeup-setting microspheres is different: trimethylsiloxysilicate is replaced with polyvinylpyrrolidone.

[0070] The preparation method of oil-controlling and makeup-setting microspheres is as follows: (1) Stir silica and calcium carbonate with 200 parts by weight of ethanol at a speed of 1500 r / min until uniform, then add polyvinylpyrrolidone, mix, heat to 60℃, keep warm for 30 min, and obtain a mixed slurry; (2) Using a high-pressure homogenizer, the mixed slurry was homogenized three times at a pressure of 15000psi, each time for 5 minutes, to obtain a homogenized mixed solution; (3) The homogeneous mixed solution is spray-dried at an inlet temperature of 100°C and an outlet temperature of 50°C. After the above spray spheroidization treatment, oil-controlling and makeup-setting microspheres are obtained.

[0071] Comparative Example 3 Unlike Example 1, the raw material composition of the oil-controlling and makeup-setting microspheres is different: honeycomb hydrophobic silica is replaced with spherical silica.

[0072] The preparation method of oil-controlling and makeup-setting microspheres is as follows: (1) Stir spherical silica and calcium carbonate with 200 parts by weight of ethanol at a speed of 1500 r / min until uniform, then add trimethylsiloxysilicate, mix, heat to 60℃, keep warm for 30 min, and obtain a mixed slurry; (2) Using a high-pressure homogenizer, the mixed slurry was homogenized three times at a pressure of 15000psi, each time for 5 minutes, to obtain a homogenized mixed solution; (3) The homogeneous mixed solution is spray-dried at an inlet temperature of 100°C and an outlet temperature of 50°C. After the above spray spheroidization treatment, oil-controlling and makeup-setting microspheres are obtained.

[0073] Comparative Example 4 Unlike Example 1, the raw material composition of the oil-controlling and makeup-setting microspheres is different: calcium carbonate is replaced with talc.

[0074] The preparation method of oil-controlling and makeup-setting microspheres is as follows: (1) Stir silica and talc powder with 200 parts by weight of ethanol at a speed of 1500 r / min until uniform, then add trimethylsiloxysilicate, mix, heat to 60℃, keep warm for 30 min, and obtain a mixed slurry; (2) Using a high-pressure homogenizer, the mixed slurry was homogenized three times at a pressure of 15000psi, each time for 5 minutes, to obtain a homogenized mixed solution; (3) The homogeneous mixed solution is spray-dried at an inlet temperature of 100°C and an outlet temperature of 50°C. After the above spray spheroidization treatment, oil-controlling and makeup-setting microspheres are obtained.

[0075] Comparative Example 5 Unlike Example 1, the raw material composition of the oil-controlling and makeup-setting microspheres is different, specifically: 62 parts of honeycomb hydrophobic silica (4-5μm), 30 parts of calcium carbonate, and 8 parts of trimethylsiloxysilicate. All other components are the same as in Example 1.

[0076] Test 1: Performance Testing Test items: Angle of repose, loose packing density, water contact angle, oil absorption value, particle size, and morphology observation.

[0077] Angle of repose: Refer to GB / T 16913-2008 "Test Methods for Physical Properties of Dust".

[0078] Loose packing density: Refer to GB / T 31057.1-2014 "Physical properties test of particulate materials - Part 1: Measurement of loose packing density".

[0079] Contact angle: The contact angle of the sample under test is measured using a powder contact angle measuring instrument.

[0080] Oil absorption value: The oil absorption value of the test sample was tested using a German fully automatic oil absorption instrument and reagent-grade refined flaxseed oil.

[0081] Particle size: Refer to GB / T 19077-2024 "Particle size analysis - Laser diffraction method".

[0082] Morphological observation: Scanning electron microscopy.

[0083] Meaning of detection indicators: A lower angle of repose results in higher fluidity, better extensibility, and superior performance.

[0084] The lower the bulk density, the higher the product's fluffiness and the better its performance.

[0085] The larger the contact angle, the higher the hydrophobicity and the better the product performance.

[0086] The higher the oil absorption value, the better the oil absorption effect and the better the product performance.

[0087] The results of the repose angle, bulk density, water contact angle, oil absorption value, and particle size of the oil-controlling and makeup-setting microspheres in each embodiment and comparative example are shown in Table 1.

[0088] Table 1

[0089] The particle size distribution diagram of the oil-controlling and makeup-setting microspheres in Example 1 is shown below. Figure 1 .

[0090] Electron micrograph of the honeycomb hydrophobic silica used in this invention is shown in the figure. Figure 2 .

[0091] According to the test data in Table 1, Examples 1-7 are superior to Comparative Examples 1-5 in all aspects. The oil-controlling and makeup-setting microspheres of Examples 1-7 have better fluidity, higher fluffiness, better hydrophobicity, and better oil absorption.

[0092] The morphological observation results are shown in Table 2. Among them, the electron micrograph of the oil-controlling and makeup-setting microspheres of Example 1 is shown in Table 2. Figure 3 .

[0093] Table 2

[0094] Test 2 Black and white checkered opacity test paper: All oil-controlling and makeup-setting microsphere products of the examples and comparative examples were mixed with dioctyl carbonate at a mass ratio of 1:2 to form a test slurry. The test slurry was then coated onto a glass slide to a film thickness of 10 μm using a wire bar coater. The transparency was then compared with the black and white checkered opacity test paper by four testers who observed it with the naked eye.

[0095] Transparency rating criteria: 0-5 points, with the closer to 5 points being the better the transparency, 0 points representing the worst transparency, and 5 points representing the best transparency.

[0096] The transparency scoring criteria are shown in Table 3: Table 3

[0097] Spectrophotometer transmittance comparison: Each oil-control and makeup-setting microsphere sample was dissolved in anhydrous ethanol at a mass ratio of 1:2 to form a test slurry. The test slurry was then coated onto a glass slide to a film thickness of 10 μm using a wire bar coater. The transmittance (%) and haze (%) were then measured and compared using a spectrophotometer. The wavelength was set to visible light in the range of 400 nm to 780 nm.

[0098] The transparency score and the results of haze and transmittance tests are shown in Table 4.

[0099] Table 4

[0100] According to the test data in Table 4, the examples are superior to the comparative examples in many aspects. The oil-controlling and makeup-setting microspheres of Examples 1-7 have better transparency, higher haze, more obvious soft-focus effect, and more natural makeup.

[0101] Test 3: Soft Focus Effect Test Tested samples: Example 1, honeycomb hydrophobic silica raw material, calcium carbonate raw material.

[0102] Detection method: Divide the skin of the same person's hand into three equal areas, and apply oil at a concentration of (0.1±0.02) g / cm². 2 Apply the powder in a single application, then take an equal amount of the test sample (oil-controlling and setting microspheres), and use a powder puff to gently and evenly press the test sample onto the designated area. Compare the soft-focus effect of the area after pressing the powder. See Table 5 for specific results.

[0103] Table 5

[0104] According to the test data in Table 5, Example 1 has both good oil control and soft-focus effects.

[0105] Test 4: Makeup Holding Power Test Testing method: Sixty female subjects aged 25-35 were randomly divided into 12 groups of 5 people each. Under the management of the testers, the subjects used the corresponding test samples (oil-controlling and makeup-setting microspheres of each embodiment and comparative example). After cleansing their face with water, they sprayed toner. After the toner dried, they applied makeup in sequence with primer, foundation and loose powder. Then, they gently dabbed an appropriate amount of test sample with a powder puff and patted their face. The test lasted for 8 hours. They spent 20 minutes outdoors at noon and the rest of the time indoors.

[0106] Indoor temperature 26℃, humidity 58%; outdoor temperature 35℃, humidity 62%.

[0107] After the experiment, the subjects' faces were visually observed, and the makeup setting effect was scored from 1 to 10: a score closer to 10 indicates complete makeup with minimal makeup fading; a score closer to 1 indicates patchy, incomplete makeup with significant makeup fading. The scoring criteria for the makeup setting effect are shown in Table 6, and the results are shown in Table 7.

[0108] Table 6

[0109] Table 7

[0110] According to the test data in Table 7, Examples 1-7 have better makeup setting effect compared to the comparative examples.

[0111] Test 5: Sensory Evaluation Questionnaires were distributed to participants who underwent makeup retention testing, and they rated the degree of freshness and comfort on a scale of 1 to 10. A score closer to 10 indicates a more refreshing and non-sticky feel, and greater comfort without tightness or dryness. The scoring criteria for freshness and comfort are shown in Table 8.

[0112] Table 8

[0113] The results of the freshness and comfort ratings are shown in Table 9.

[0114] Table 9

[0115] The results show that the subjects who used the test samples from Examples 1 to 7 were very satisfied with the product, finding it refreshing, non-sticky, and highly comfortable.

[0116] In summary, Comparative Example 1, based on Example 1, involved a simple physical mixing process; Comparative Example 2, based on Example 1, replaced trimethylsiloxysilicate; Comparative Example 3, based on Example 1, replaced honeycomb silica; Comparative Example 4, based on Example 1, replaced calcium carbonate with talc; and Comparative Example 5, based on Example 1, changed the weight ratio of each component. All of these changes affected the special structure of the soft-focus, oil-controlling, and setting makeup microspheres, resulting in unsatisfactory effects. Therefore, it is necessary to strictly limit the types, amounts, and preparation methods of raw materials for the soft-focus, oil-controlling, and setting makeup microspheres to obtain microspheres with a special structure and achieve unexpectedly excellent makeup setting effects.

[0117] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A type of oil-controlling and makeup-setting microsphere with a soft-focus effect, characterized in that, The raw material components, by weight, include: 70-98 parts silica, 1-15 parts calcium carbonate, and 1-15 parts trimethylsiloxysilicate.

2. The oil-controlling and makeup-setting microspheres according to claim 1, characterized in that, The raw material components, by weight, include: 80-90 parts silica, 2-13 parts calcium carbonate, and 2-13 parts trimethylsiloxysilicate.

3. The oil-controlling and makeup-setting microspheres according to claim 2, characterized in that, The raw material components, by weight, include: 80-85 parts silica, 2-13 parts calcium carbonate, and 2-13 parts trimethylsiloxysilicate.

4. The oil-controlling and makeup-setting microspheres according to claim 2, characterized in that, The raw material components, by weight, include: 80-90 parts silica, 5-10 parts calcium carbonate, and 5-10 parts trimethylsiloxysilicate.

5. The oil-controlling and makeup-setting microspheres according to claim 3 or 4, characterized in that, The raw material components, by weight, include: 84 parts silica, 8 parts calcium carbonate, and 8 parts trimethylsiloxysilicate.

6. The oil-controlling and makeup-setting microspheres according to claim 1, characterized in that, The silica is a honeycomb-shaped hydrophobic silica with a particle size of 4-12 μm; The specific surface area of ​​the silica is 80-90 cm². 2 / g.

7. The method for preparing oil-controlling and makeup-setting microspheres according to any one of claims 1-6, characterized in that, The process includes the following steps: mixing silica, calcium carbonate, and trimethylsiloxysilicate with ethanol until homogeneous, heating and mixing, homogenizing, and spray drying to obtain oil-controlling and makeup-setting microspheres.

8. The preparation method according to claim 7, characterized in that, Including the following steps: (1) Stir silica and calcium carbonate with ethanol, then add trimethylsiloxysilicate, heat and mix to obtain a mixed slurry; (2) The mixed slurry is homogenized to obtain a homogeneous mixed solution; (3) The homogeneous mixed solution is spray-dried and then spray-spheroidized to obtain oil-controlling and makeup-setting microspheres.

9. The preparation method according to claim 8, characterized in that, In step (1), the amount of ethanol used is 1.5-3 times the total mass of silica, calcium carbonate and trimethylsiloxysilicate; In step (1), the heating and mixing specifically involves heating to 50-70℃ and holding for 20-30 minutes. In step (2), the homogenization process specifically involves performing homogenization 2-5 times at a pressure of 10000-20000psi, each time for 1-5 minutes.

10. A cosmetic product, characterized in that, The components include: oil-controlling and makeup-setting microspheres as described in any one of claims 1-6 or oil-controlling and makeup-setting microspheres prepared by the preparation method described in any one of claims 7-9.

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