Powder treatment method of water-resistant pressed powder

Abstract

The invention relates to the field of cosmetics, and particularly discloses a powder treatment method of a water-resistant pressed powder. The powder treatment method of the water-resistant pressed powder comprises the following steps: S1, preparing a wet material; s2, preparing semi-finished product powder; and S3, pressing: carrying out compression molding on the semi-finished product powder obtained in the step S2 under the pressure of 40-80 MPa to obtain the water-resistant pressed powder. The product disclosed by the invention has a good water-resistant effect and a makeup effect, the phenomenon that powder does not sink within 2 hours in a water-resistant test can be kept, and meanwhile, various substances such as the filling agent, the coloring agent, the emollient, the film-forming agent, the preservative, the humectant, the skin conditioner and the solvent have a good synergistic effect, so that the product disclosed by the invention also has a good makeup effect, and the makeup effect is good. The makeup holding power, the spreadability and the moisturizing power are relatively excellent.

Description

Technical Field

[0001] The present application relates to the technical field of cosmetics, and in particular to a powder processing method for water-resistant pressed powder. Background Art

[0002] To meet consumers' diverse needs for pressed powder, the industry has traditionally employed a variety of technologies. Early wet / dry pressed powders primarily relied on specialized formulas to impart a degree of hydrophobicity. This ensured the powder remained relatively stable in the presence of sweat or moisture, preventing makeup from melting or smudging. Additionally, some manufacturers have experimented with carefully selecting and strategically combining different powder types to optimize the smoothness of application and makeup effect. This approach results in a smoother, more integrated texture, allowing makeup to adhere more closely to the skin and create a soft-focus effect. However, these common pressed powder production techniques currently have significant shortcomings. While wet / dry pressed powders may perform reasonably well in terms of hydrophobicity, the powder can be quite grainy and lacks fineness. This results in the powder having difficulty evenly adhering to the skin, resulting in cakey, patchy results. Furthermore, the desired soft-focus and pore-invisible effect cannot be achieved, resulting in a rough, less refined appearance. Pressed powders that rely on a combination of powders are difficult to have good hydrophobicity due to the limitations of the formula system itself. After wearing makeup for a long time, they are prone to makeup coming off and becoming mottled, and their durability is poor. Summary of the Invention

[0003] In order to solve the above technical problems, the present application provides a powder processing method for water-resistant powder cake.

[0004] The present application provides a powder processing method for a water-resistant pressed powder, comprising the following steps: S1, preparing a wet material: blending a filler and a colorant, stirring at a speed of 1200-2850 r / min for 2-5 minutes, and then crushing at a speed of 70-140 r / min to obtain a first mixed material; blending an emollient, a film-forming agent, a moisturizer, a preservative and the first mixed material, stirring at a speed of 1200-2850 r / min for 2-5 minutes, and then crushing at a speed of 70-140 r / min to obtain a second mixed material, blending the second mixed material with a skin conditioner, and crushing at a speed of 1200-2850 r / min. Stir for 2-5 minutes, then crush at a speed of 70-140 r / min, pass through a 200-mesh sieve to obtain a powder, blend the powder with a solvent, and stir at a speed of 15-30 r / min for 10-20 minutes to obtain a wet material; S2, prepare a semi-finished powder: spread the wet material obtained in the step S1 evenly, dry it at a temperature of 50-80°C for 8-24 hours, and stir it at a speed of 1200-2850 r / min for 2-5 minutes to obtain a semi-finished powder; S3, press: press the semi-finished powder obtained in the step S2 under a pressure of 40-80 MPa to obtain a water-resistant powder cake.

[0005] Preferably, the filler includes silane-modified mica, modified synthetic fluorphlogopite, modified synthetic fluorphlogopite composite and silica.

[0006] Preferably, the filler further comprises polymethyl methacrylate cross-linked polymer.

[0007] Preferably, the filler further comprises vinyl dimethicone / polymethylsiloxane silsesquioxane cross-linked polymer.

[0008] Preferably, the modified synthetic fluorphlogopite composite is prepared from synthetic fluorphlogopite, hydroxyapatite, zinc oxide, aluminum hydroxide, triethoxyoctylsilane and lauroyl lysine.

[0009] Preferably, the active substances in the skin conditioner include Anemarrhena asphodeloides root extract, Forsythia suspensa extract, Curcuma longa root extract and Kaempferia galanga root extract.

[0010] Preferably, the emollient includes one or more of squalane, polydimethylsiloxane and glyceryl laurate.

[0011] Preferably, the moisturizing agent comprises raspberry ketone and / or caprylyl glycol.

[0012] Preferably, the preservative comprises chlorphenesin and / or phenoxyethanol.

[0013] Preferably, the film-forming agent is trimethylsiloxysilicate.

[0014] Optionally, the filler further includes boron nitride, magnesium myristate, barium sulfate and bismuth oxychloride.

[0015] Optionally, the colorant includes one of titanium dioxide, yellow iron oxide, red iron oxide and black iron oxide.

[0016] Optionally, the solvent includes water, isopropanol and isododecane.

[0017] By adopting the above-mentioned technical scheme, the present application utilizes fillers, colorants, emollients, film-forming agents, preservatives, moisturizers, skin conditioners and solvents and other substances for compounding, and prepares wet materials through step-by-step feeding and stirring operations. The wet materials are then spread out and dried to obtain semi-finished powder materials. The semi-finished powder materials are then pressed and formed under a pressure of 40-80MPa. The greater pressure can form a greater interfacial tension on the surface of the semi-finished powder materials, thereby making the powder cake of the present application have good water resistance. In the test, the powder can maintain no sinking within 2 hours. Silane-modified mica has good spreadability and skin adherence, modified synthetic fluorphlogopite has soft, clear and matte properties, and good powder pressing properties, vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer can reduce the glossiness of the skin surface through light scattering, visually modify fine lines and pores, its spherical particles bring a silky touch, the dynamic friction coefficient is as low as 0.3-0.5, and the oil absorption rate can reach 2-3 times its own weight, which enhances the moisturizing performance by sealing in moisture, and polymethyl methacrylate crosslinked polymer can provide a good soft focus effect. Overall, there is a good synergistic effect between the various substances in this application, which can improve the makeup effect as much as possible while maintaining water resistance, and the makeup lasting power, spreadability and moisturizing power are relatively excellent. DETAILED DESCRIPTION

[0018] Material Source Unless otherwise specified, the raw materials used in this application are all commercially available products, specifically: Silane-modified mica was purchased from KSPEARL, brand: Mica AS; Modified synthetic fluorphlogopite was purchased from Anhui Gerui New Material Technology Co., Ltd., brand: SM-530GL; The modified synthetic fluorphlogopite composite was purchased from Hebei Meisen Titanium Dioxide Co., Ltd., brand: HSZ-LS; Silica was purchased from LUXON Co., Ltd., brand: SILIALX7; Boron nitride was purchased from Jiangxi Liankai Technology Co., Ltd., brand: Kingbornit 700; Magnesium myristate was purchased from Guangzhou HaoQi Innovation Technology Co., Ltd., brand: MGMY / L; Barium sulfate was purchased from Sakai Chemical Industry Co., Ltd., brand: Flake Shaped Barium Sulfate H; Bismuth oxychloride was purchased from Guangzhou Haoji Biotechnology Co., Ltd., brand: BISILK; Polymethyl methacrylate cross-linked polymer was purchased from Guide Win Special Chemical Co., Ltd., brand: GWC-08C; Titanium dioxide was purchased from ISHIHARASANGYO KAISHA, LTD., brand: TIPAQUE PFC407; Yellow iron oxide was purchased from Huayi Yipin (Yixing) Performance Pigment Co., Ltd., brand: Yellow iron oxide YPC33032; Iron oxide red was purchased from Venator Materials PLC, brand: HP 2199T; Iron oxide black was purchased from Venator Materials PLC, brand: HP 5000T; Squalane was purchased from Aprinnova, LLC, brand: Neossance TM Squalane; Polydimethylsiloxane was purchased from Wacker Chemical (China) Co., Ltd., brand: KF-96A-10CS; Trimethylsiloxysilicate was purchased from Wacker Chemical (China) Co., Ltd., brand: Belsil TMS803; Phenoxyethanol was purchased from AMT BIOTECH LTD, brand: UltraCare PHCG; Caprylyl glycol was purchased from AMT BIOTECH LTD, brand: UltraCare PHCG; Chlorphenesin was purchased from THOR SPECIALTY CHEMICAL (ZHENJIANG) CO., LTD., brand: UltraCareCP; Raspberry ketone was purchased from AMT BIOTECH LTD, brand: UltraCare RSK; Glyceryl laurate was purchased from Foshan Yinmei United Technology Co., Ltd.; Skin conditioning agent was purchased from Shanghai Zhina Biotechnology Co., Ltd., brand: Oil Control Formula CQ-007; Isopropyl alcohol was purchased from Shanghai Runyou Chemical Technology Co., Ltd.; Isododecane was purchased from IDEMITSU KOSAN CO., LTD., brand: IP CLEAN LX.

[0019] The present application is further described in detail below with reference to the following examples and comparative examples.

[0020] Example 1 A method for processing water-resistant pressed powder comprises the following steps: S1. Prepare a wet material: pour a filler and a colorant into a high-speed grinder, stir at a speed of 2850 r / min for 2 min, and then grind at a speed of 140 r / min to obtain a first mixed material; blend an emollient, a film-forming agent, a moisturizer, and a preservative with the first mixed material, stir at a speed of 1200 r / min for 5 min, and then grind at a speed of 70 r / min to obtain a second mixed material, blend the second mixed material with a skin conditioner, stir at a speed of 1200 r / min for 5 min, and then grind at a speed of 140 r / min, pass through a 200 mesh sieve to obtain a powder, blend the powder with a solvent, and stir at a speed of 30 r / min for 10 min to obtain a wet material; S2. Preparing a semi-finished powder: placing the wet material obtained in step S1 into a stainless steel tray, spreading it evenly, then placing it in a drying oven and drying it at 80° C. for 8 h until the solvent is completely evaporated, and stirring it at a speed of 2850 r / min for 2 min to obtain a semi-finished powder; S3, pressing: the semi-finished powder obtained in step S2 is placed in an aluminum tray and a mold, and pressed into shape using a powder press, with the pressure controlled at 80 MPa to obtain a water-resistant powder cake.

[0021] Example 2 A method for processing water-resistant pressed powder comprises the following steps: S1. Prepare a wet material: pour a filler and a colorant into a high-speed grinder, stir at a speed of 1200 r / min for 5 minutes, and then grind at a speed of 70 r / min to obtain a first mixed material; blend an emollient, a film-forming agent, a moisturizer, and a preservative with the first mixed material, stir at a speed of 2850 r / min for 2 minutes, and then grind at a speed of 140 r / min to obtain a second mixed material, blend the second mixed material with a skin conditioner, stir at a speed of 2850 r / min for 2 minutes, and then grind at a speed of 70 r / min, pass through a 200 mesh sieve to obtain a powder, blend the powder with a solvent, and stir at a speed of 15 r / min for 20 minutes to obtain a wet material; S2. Preparing a semi-finished powder: placing the wet material obtained in step S1 into a stainless steel tray, spreading it evenly, then placing it in a drying oven and drying it at 50° C. for 24 h until the solvent is completely evaporated, and stirring it at a speed of 1200 rpm for 5 min to obtain a semi-finished powder; S3, pressing: the semi-finished powder obtained in step S2 is placed in an aluminum tray and a mold, and pressed into shape using a powder press, with the pressure controlled at 40 MPa to obtain a water-resistant powder cake.

[0022] Example 3 A method for processing water-resistant pressed powder comprises the following steps: S1. Prepare a wet material: pour a filler and a colorant into a high-speed grinder, stir at a speed of 2000 r / min for 3.5 min, and then grind at a speed of 100 r / min to obtain a first mixed material; blend an emollient, a film-forming agent, a moisturizer, and a preservative with the first mixed material, stir at a speed of 2000 r / min for 3.5 min, and then grind at a speed of 100 r / min to obtain a second mixed material, blend the second mixed material with a skin conditioner, stir at a speed of 2000 r / min for 3.5 min, and then grind at a speed of 100 r / min, pass through a 200 mesh sieve to obtain a powder, blend the powder with a solvent, and stir at a speed of 25 r / min for 15 min to obtain a wet material; S2. Preparing a semi-finished powder: placing the wet material obtained in step S1 into a stainless steel tray, spreading it evenly, then placing it in a drying oven and drying it at 60° C. for 15 h until the solvent is completely evaporated, and stirring it at a speed of 2000 r / min for 3.5 min to obtain a semi-finished powder; S3, pressing: the semi-finished powder obtained in step S2 is placed in an aluminum tray and a mold, and pressed into shape using a powder press, with the pressure controlled at 60 MPa to obtain a water-resistant powder cake.

[0023] Table 1 Dosage table for Example 1-2 Example 4 A powder processing method for water-resistant pressed powder, which differs from Example 1 in that: The difference from Example 1 is that the modified synthetic fluorphlogopite composite in step S1 is removed, the amount of silane-modified mica is adjusted to 27.5 g, and the rest is the same as Example 1.

[0024] Example 5 A powder processing method for water-resistant pressed powder, which differs from Example 1 in that: The difference from Example 1 is that the polymethyl methacrylate cross-linked polymer in step S1 is removed, the amount of silane-modified mica is adjusted to 30 g, and the rest is the same as Example 1.

[0025] Example 6 A powder processing method for water-resistant pressed powder, which differs from Example 1 in that: The difference from Example 1 is that the vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer in step S1 is removed, the amount of silane-modified mica is adjusted to 35 g, and the rest is the same as Example 1.

[0026] Comparative Example 1 The difference from Example 1 is that the pressing pressure in step S3 is 30 MPa, and the rest is the same as Example 1.

[0027] Comparative Example 2 The difference from Example 1 is that the pressing pressure in step S3 is 90 MPa, and the rest is the same as Example 1.

[0028] Performance testing 1. Hydrophobicity test: Refer to QB 1976-2004 "Cosmetic Powder" for determination: Gently scrape the powder from the surface of the water-resistant pressed powder and sieve it through an 80-mesh sieve. Weigh 0.1 g of the sieved powder and place it in 100 mL of water. Observe every 0.5 h for any sinking of the powder. If so, record the time in Table 2. 2. Makeup Effect Testing: 120 female volunteers aged 25-28 with healthy, undamaged skin were selected and divided into 8 groups of 15 participants each. Each group of volunteers used the water-resistant pressed powder prepared in the Examples and Comparative Examples, respectively, and were tested as follows: the volunteers applied powder by hand and applied makeup to both sides of their faces. After 8 hours of makeup application, the volunteers completed a trial evaluation form based on the degree of makeup fading. The lowest makeup fading was scored as 5, the highest score, and the highest makeup fading was scored as 1. The trial evaluation forms were collected, and the average of the evaluation scores was used to evaluate the makeup-lasting effect of the water-resistant pressed powder. The volunteers applied powder by hand and applied makeup to both sides of their faces. The volunteers completed a trial evaluation form based on the ease of makeup spreading and the uniformity of the makeup after spreading. The best spreading effect was scored as 5, the highest score, and the worst spreading effect was scored as 1. The trial evaluation forms were collected, and the average of the evaluation scores was used to evaluate the spreadability of the water-resistant pressed powder. 3. Moisturizing and Skin Care Testing: 120 female volunteers aged 25-28 with healthy, intact skin were selected and divided equally into 8 groups of 15 participants each. Each group of volunteers used the water-resistant pressed powder prepared in the Examples and Comparative Examples. After 7 days, the facial moisture content of the volunteers was measured 20 minutes after cleansing their faces at a temperature of 20±2°C and a humidity of 50±10%. The average moisture content was calculated and recorded in Table 2.

[0029] Table 2 Comprehensive evaluation table Group Powder sinking time / h Long-lasting makeup effect Spreadability Water content% Example 1 3.0 4.5 4.8 52.34 Example 2 2.0 4.7 4.8 52.07 Example 3 3.0 4.7 4.9 53.42 Example 4 3.0 4.3 4.7 52.32 Example 5 2.5 4.1 4.7 52.66 Example 6 3.0 4.1 4.6 51.87 Comparative Example 1 0.5 4.5 4.6 50.45 Comparative Example 2 3.0 3.5 2.9 51.66 Data Analysis: As can be seen from Table 2, the water-resistant powder foundations of Examples 1-6 have a powder sinking time of more than 2 hours, and the makeup lasting effect and spreadability scores are both above 4 points. The user's skin moisture content after use is not less than 51.87%, which proves that the water-resistant powder foundation of the present application has good water resistance, good makeup lasting effect after application, strong spreadability, and can also have a certain moisturizing effect.

[0030] In Comparative Example 1, the present application reduced the pressing pressure in step S3, and the results showed that the powder sinking time dropped to 0.5h, proving that the present application can indeed increase the interfacial tension of the powder surface and improve its water resistance by performing pressing treatment at a certain pressure.

[0031] In Comparative Example 2, the present application increased the pressing pressure in step S3. The results showed that the powder sinking time remained unchanged, but the makeup lasting effect score and the spreadability score were significantly reduced. This proves that the present application strictly controls the pressure during pressing, which not only makes the powder cake have good water resistance, but also makes it easier to take powder and apply makeup, and can form a good makeup effect on the user's face, giving the user a more comfortable use experience and having a certain moisturizing effect.

[0032] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for processing water-resistant powder cake, characterized in that: The following steps are involved: S1. Preparing a wet material: blending a filler and a colorant, stirring at a speed of 1200-2850 r / min for 2-5 min, and then crushing at a speed of 70-140 r / min to obtain a first mixed material; blending an emollient, a film former, a moisturizer, and a preservative with the first mixed material, stirring at a speed of 1200-2850 r / min for 2-5 min, and then crushing at a speed of 70-140 r / min to obtain a second mixed material; blending the second mixed material with a skin conditioner, stirring at a speed of 1200-2850 r / min for 2-5 min, and then crushing at a speed of 70-140 r / min, and passing through a 200 mesh sieve to obtain a powder; blending the powder with a solvent, and stirring at a speed of 15-30 r / min for 10-20 min to obtain a wet material; S2. Preparing a semi-finished powder: spreading the wet material obtained in step S1 evenly, drying it at a temperature of 50-80° C. for 8-24 hours, and stirring it at a speed of 1200-2850 r / min for 2-5 minutes to obtain a semi-finished powder; S3, pressing: pressing the semi-finished powder obtained in step S2 under a pressure of 40-80 MPa to obtain a water-resistant powder cake.

2. The method for processing water-resistant powder cake according to claim 1, characterized in that: The filler includes silane-modified mica, modified synthetic fluorphlogopite, modified synthetic fluorphlogopite composite and silica.

3. The method for processing water-resistant powder cake according to claim 2, characterized in that: The filler also includes polymethyl methacrylate cross-linked polymer.

4. The method for processing water-resistant powder cake according to claim 2, characterized in that: The filler also includes vinyl dimethicone / methicone silsesquioxane crosspolymer.

5. The method for processing water-resistant powder cake according to claim 2, characterized in that: The modified synthetic fluorphlogopite composite is prepared from synthetic fluorphlogopite, hydroxyapatite, zinc oxide, aluminum hydroxide, triethoxyoctylsilane and lauroyl lysine.

6. The method for processing water-resistant powder cake according to claim 1, characterized in that: The active substances in the skin conditioner include Anemarrhena asphodeloides root extract, Forsythia suspensa extract, Curcuma longa root extract and Kaempferia galanga root extract.

7. The method for processing water-resistant powder cake according to claim 1, characterized in that: The emollient includes one or more of squalane, polydimethylsiloxane and glyceryl laurate.

8. The method for processing water-resistant powder cake according to claim 1, characterized in that: The moisturizing agent includes raspberry ketone and / or caprylyl glycol.

9. The method for processing water-resistant powder cake according to claim 1, characterized in that: The preservatives include chlorphenesin and / or phenoxyethanol.

10. The method for processing water-resistant powder cake according to claim 1, characterized in that: The film-forming agent is trimethylsiloxysilicate.

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