A strong skin feeling silver-coated glass powder, a preparation method and application thereof, and a waterproof eye shadow powder compact

Abstract

The application discloses a kind of strong skin feeling silver-coated glass powder, comprising: sheet silver-coated glass powder and spherical silver-coated glass powder, wherein the weight ratio of sheet silver-coated glass powder and spherical silver-coated glass powder is 1-3:1.The application also discloses a preparation method of the above-mentioned strong skin feeling silver-coated glass powder and its application in eye shadow.The application also discloses a waterproof eye shadow powder cake, comprising: silicone oil and the above-mentioned strong skin feeling silver-coated glass powder.The application cooperates sheet silver-coated glass powder and spherical silver-coated glass powder with a specific ratio, which can make it have a silky touch on the skin and balance the gloss, color effect of the whole silver-coated glass powder, making it show excellent comprehensive performance in eye shadow;And chelate treatment with octaamino propyl cage polysilsesquioxane and citric acid can avoid the reduction of silver layer gloss, and has micro-nano structure to improve waterproofness, and can improve adhesion, improve makeup lasting performance.

Description

Technical Field

[0001] This invention relates to the field of silver-coated glass powder technology, and more particularly to a skin-feeling silver-coated glass powder, its preparation method, its application, and a waterproof eyeshadow powder. Background Technology

[0002] Eyeshadow is an important makeup product, and its texture and shimmer directly affect the user experience and aesthetic effect. In recent years, consumers have increasingly higher demands for the skin feel of eyeshadow, requiring not only good shimmer and color, but also a silky smooth feel and long-lasting adhesion on the skin. While silver-coated glass powder can provide good shimmer and color effects, it tends to appear grainy on the skin, lacks a silky smooth feel, and has poor adhesion, low shimmer retention, and poor water resistance, resulting in short-lasting makeup effects. Summary of the Invention

[0003] Based on the technical problems existing in the background technology, this invention proposes a skin-feeling silver-coated glass powder, its preparation method, and its application, as well as a waterproof eyeshadow powder. This invention combines flake-shaped and spherical silver-coated glass powder in a specific ratio, which can give it a silky feel on the skin and balance the gloss and color effect of the entire silver-coated glass powder, making it exhibit excellent overall performance in eyeshadow. Furthermore, it uses chelation treatment with octaaminopropyl cage-like polysilsesquioxane and citric acid to avoid reducing the gloss of the silver layer, and the micro-nano structure improves water resistance, adhesion, and makeup longevity.

[0004] This invention proposes a skin-feeling silver-coated glass powder, comprising: flake-shaped silver-coated glass powder and spherical silver-coated glass powder, wherein the weight ratio of flake-shaped silver-coated glass powder to spherical silver-coated glass powder is 1-3:1.

[0005] This invention discovers that by combining flake-shaped silver-coated glass powder and spherical silver-coated glass powder in a specific ratio, the spherical silver-coated glass powder can act as a "ball bearing" within the flake-shaped silver-coated glass powder layers, sliding within the layers and significantly improving the glide of the silver-coated glass powder, giving it a silky feel on the skin and significantly enhancing the user experience. Furthermore, by selecting an appropriate ratio, the overall gloss and color effect of the silver-coated glass powder can be balanced, while also meeting consumers' requirements for skin feel, resulting in excellent overall performance in eyeshadow.

[0006] Preferably, both the flake-shaped and spherical silver-coated glass powders are coated with a chelating layer, wherein the chelating layer is composed of octaaminopropyl cage-like polysilsesquioxane and citric acid.

[0007] Preferably, the particle size of the flake-shaped silver-coated glass powder is 50-150 μm; the particle size of the spherical silver-coated glass powder is 10-60 μm.

[0008] The particle size mentioned above refers to the D50 particle size, which is the characteristic particle size corresponding to a cumulative distribution percentage of 50% in a particle group. Its physical meaning is that the volume or number of particles larger or smaller than this diameter each account for 50% of the total volume or total number.

[0009] Preferably, the method for coating the surface of silver-coated glass powder with a chelating layer includes the following steps: mixing flake-shaped silver-coated glass powder and spherical silver-coated glass powder with a mixed aqueous solution of citric acid and octaaminopropyl cage-like polysilsesquioxane, and performing a chelation treatment to obtain silver-coated glass powder with a chelating layer.

[0010] Preferably, the weight ratio of citric acid to octaaminopropyl cage-like polysilsesquioxane is 1:2-4.

[0011] The chelation treatment can be performed at a temperature of 30-40℃ for 1-2 hours.

[0012] Because silver is a chemically reactive metal, it reacts with oxygen and sulfides in the air, skin, and body fluids, causing the surface to darken or lose its luster. This reduces the shine and lifespan of silver-coated eyeshadow powders. Therefore, this invention uses citric acid and octaaminopropyl cage-like polysilsesquioxane to chelate the silver-coated glass powder, resulting in a nanoscale POSS layer chelated on the surface of the micron-sized silver-coated glass powder, forming a micro-nano structure. The POSS structure is relatively large, and citric acid is still chelated in the gaps between the POSS structures. This complementary chelation method gives the silver-coated glass powder excellent antioxidant and sulfide-resistant properties, allowing it to maintain a good shine for a long time and preventing the silver layer from losing its luster.

[0013] Furthermore, the resulting micro-nano structure enhances the waterproof performance of the silver-coated glass powder, preventing contact between the silver layer and oxidized or sulfided substances in the air, water, and bodily fluids, thus avoiding a reduction in the silver layer's luster. When used in eyeshadow, its micro-nano structure also improves the eyeshadow's waterproof performance. On the other hand, POSS, resembling a sphere, chelates on the surface of the silver-coated glass powder, working in conjunction with it to further enhance the silky smooth feel of the silver-coated glass powder. It also improves the dispersibility of the silver-coated glass powder, ensuring it is evenly dispersed in the silicone oil, thereby further preventing a grainy feel on the skin. Moreover, it works with the silicone oil to improve adhesion and enhance the longevity of the makeup effect.

[0014] In the above citric acid solution, the concentration of citric acid is 1-2 g / L.

[0015] After the above chelation treatment, solid-liquid separation, water washing, and drying are performed to obtain silver-coated glass powder with a chelation layer.

[0016] The present invention also proposes a method for preparing the above-mentioned skin-feeling silver-coated glass powder, comprising the following steps: mixing flake glass powder and spherical glass powder in a weight ratio of 1-3:1, and performing chemical silver plating to obtain skin-feeling silver-coated glass powder.

[0017] Flake glass powder can be prepared by high-temperature melting and rapid cooling processes; spherical glass powder can be prepared by spray drying or flame melting processes.

[0018] Before electroless silver plating, flake glass powder and spherical glass powder undergo pretreatment. The specific pretreatment steps include: adding flake glass powder and spherical glass powder to an aqueous solution of surfactant and ultrasonically dispersing them for 10-30 minutes to remove impurities on the surface of the glass powder and improve dispersibility; the surfactant can be sodium dodecyl sulfate, squalane, and isopropyl palmitate, etc.; the concentration of the surfactant aqueous solution can be 0.01-0.05 g / mL.

[0019] Preferably, during chemical silver plating, the silver plating solution contains 10-30 g / L of silver source, 20-50 g / L of reducing agent, and 5-15 g / L of stabilizer, and the pH of the silver plating solution is 8.0-9.0.

[0020] Preferably, the reducing agent is at least one of aldehydes and hypophosphite, and the stabilizer is potassium sodium tartrate.

[0021] The aldehydes mentioned above can be formaldehyde, etc. The hypophosphite mentioned above can be sodium hypophosphite, etc. The silver source mentioned above can be silver nitrate, etc.

[0022] The silver plating solution of this invention is alkaline. Silver nitrate will form black silver oxide precipitate under alkaline conditions, which will reduce the gloss of the silver layer. This invention selects potassium sodium tartrate as a stabilizer. Under alkaline conditions, the tartrate ion is completely deprotonated and can form a soluble complex with silver ions, which will greatly reduce the concentration of free Ag⁺. This can effectively prevent silver nitrate from forming black silver oxide precipitate under alkaline conditions and avoid reducing the gloss of the silver layer.

[0023] Furthermore, sodium potassium tartrate can work synergistically with suitable reducing agents to weaken the oxidizing power of Ag⁺ and reduce the driving force for the reduction of Ag⁺ by the reducing agent, thus slowing down the reaction rate. This regulates the rate of the reduction reaction, which is conducive to the formation of a uniform silver mirror rather than rapid deposition, improving the uniformity and gloss of the silver layer. On the other hand, it can also increase the critical pH for silver oxide precipitation, preventing precipitation under alkaline conditions. These effects work together to stabilize the silver nitrate solution, making the reduction reaction controllable, promoting the uniform formation of the silver mirror, avoiding the precipitation of black silver oxide particles, and giving the silver-coated glass powder a good gloss.

[0024] The temperature for the above chemical silver plating can be 40-60℃, the time can be 1-3h, and the stirring speed can be 300-500rpm.

[0025] After chemical silver plating, the powder is washed, dried, and sieved to obtain a silver-coated glass powder with a strong skin feel.

[0026] The drying temperature can be 80-120℃, and the time can be 2-4 hours. Large particles can be removed by screening equipment to obtain uniformly sized flake-shaped and spherical silver-coated glass powder.

[0027] The present invention uses a suitable silver plating process to give the silver-plated glass powder a good luster.

[0028] This invention also proposes the application of the aforementioned skin-feeling silver-coated glass powder in eyeshadow.

[0029] The present invention also proposes a waterproof eyeshadow powder, comprising: silicone oil and the above-mentioned skin-feeling silver-coated glass powder.

[0030] In the aforementioned waterproof eyeshadow powder, the silicone oil can be dimethyl silicone oil, amino silicone oil, emulsified silicone oil, etc.

[0031] In the aforementioned waterproof eyeshadow powder, the content of the skin-feeling silver-coated glass powder can be 33-35wt%.

[0032] The aforementioned waterproof eyeshadow powder also includes: pigments, surfactants, antioxidants, etc.

[0033] The raw materials of the above-mentioned waterproof eyeshadow powder include, by weight: 33-35 parts of the above-mentioned skin-feeling silver-coated glass powder, 57-59 parts of pigment, 0.4-0.6 parts of surfactant, 0.4-0.6 parts of antioxidant, and 6-8 parts of silicone oil.

[0034] This invention combines flake-shaped and spherical silver-coated glass powder in a specific ratio, giving it a silky feel on the skin and balancing the overall gloss and color effect, resulting in excellent overall performance in eyeshadow. Furthermore, chelation treatment with octaaminopropyl cage-like polysilsesquioxane and citric acid prevents a reduction in the silver layer's gloss, and the micro-nano structure enhances water resistance, adhesion, and makeup longevity. This invention's skin-feeling silver-coated glass powder provides a new technical solution for the cosmetics industry and can replace high-cost materials such as mica powder and pearl powder, reducing costs and demonstrating significant innovation and practicality. Attached Figure Description

[0035] Figure 1 This is a photograph of the skin-feeling silver-coated glass powder obtained in Example 4.

[0036] Figure 2 A photograph of the eyeshadow powder made using the skin-feeling silver-coated glass powder of Example 4. Detailed Implementation

[0037] The technical solution of the present invention will be described in detail below through specific embodiments. However, it should be clearly stated that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0038] The water used in the following examples and comparative examples is deionized water.

[0039] Examples 1-3 and Comparative Examples 1-4

[0040] The weights of flake glass powder and spherical glass powder in the strong skin-feel silver-coated glass powders of Examples 1-3 and Comparative Examples 1-4 are shown in Table 1.

[0041] Table 1. Weight ratio of flake glass powder to spherical glass powder in Examples 1-3 and Comparative Examples 1-4

[0042]

[0043] The preparation methods of the skin-feeling silver-coated glass powder in Examples 1-3 and Comparative Examples 1-4 are the same, including the following steps:

[0044] Pretreatment: Add 70μm D50 flake glass powder and 30μm D50 spherical glass powder to a 0.03g / mL sodium dodecyl sulfate aqueous solution, respectively, and ultrasonically disperse for 10-30min to remove impurities on the surface of the glass powder and improve dispersibility. Filter, wash with water, and dry.

[0045] Chemical silver plating: Pretreated flake glass powder and spherical glass powder were mixed according to the weight ratio in Table 1 and added to the silver plating solution (the silver plating solution contains 20 g / L silver nitrate, 35 g / L sodium hypophosphite, 10 g / L potassium sodium tartrate, and the pH of the silver plating solution is 8.5). The solution was chemically silvered at 50°C and stirred at 400 rpm for 2 hours. Then the solution was filtered, washed, dried at 100°C for 3 hours, and sieved to obtain a silver-coated glass powder with a strong skin feel.

[0046] The skin-feeling silver-coated glass powders obtained in Examples 1-3 and Comparative Examples 1-4 were used to prepare eyeshadow compacts (the eyeshadow compact formula is: 34 parts skin-feeling silver-coated glass powder, 58 parts pigment, 0.5 parts isooctyl palmitate, 0.5 parts antioxidant vitamin E, and 7 parts emulsified silicone oil). The silky skin feel, skin adhesion, presence of obvious agglomerates, and makeup retention after 8 hours were examined. The results are shown in Table 2.

[0047] Test method: 20 men and 20 women aged 20-40 years were selected. They applied eyeshadow in the same environment to evaluate the silky feel and skin adhesion of the eyeshadow powder. They were rated on a scale of 1-5, with 1 being the worst and 5 being the best. The average value was taken. The presence of obvious agglomeration particles was also examined. The makeup lasting effect after 8 hours was also evaluated on a scale of 1-5, with 1 being the worst and 5 being the best.

[0048] Table 2 Skin feel test results

[0049]

[0050] As can be seen from Table 2, when the present invention selects an appropriate weight ratio of flake glass powder and spherical glass powder for use in eyeshadow, it can achieve a silky skin feel and good skin adhesion, and can be evenly dispersed in the eyeshadow powder, avoiding agglomeration and affecting the makeup effect.

[0051] Example 4

[0052] A method for preparing a skin-feeling silver-coated glass powder includes the following steps:

[0053] Take the silver-coated glass powder obtained in Example 1, add it to a mixed aqueous solution of citric acid and octaaminopropyl cage-like polysilsesquioxane (the concentration of citric acid is 1 g / L and the concentration of octaaminopropyl cage-like polysilsesquioxane is 2 g / L), mix well, stir at 30°C for chelation treatment for 2 h, filter, wash with water, and vacuum dry to obtain silver-coated glass powder with a strong skin feel.

[0054] The photo of the skin-feeling silver-coated glass powder obtained in Example 4 is shown below. Figure 1 As shown.

[0055] Example 5

[0056] A method for preparing a skin-feeling silver-coated glass powder includes the following steps:

[0057] Take the silver-coated glass powder obtained in Example 1, add it to a mixed aqueous solution of citric acid and octaaminopropyl cage-like polysilsesquioxane (the concentration of citric acid is 1 g / L and the concentration of octaaminopropyl cage-like polysilsesquioxane is 4 g / L), mix well, stir at 35°C for chelation treatment for 1 h, filter, wash with water, and vacuum dry to obtain silver-coated glass powder with a strong skin feel.

[0058] Comparative Example 5

[0059] A method for preparing a skin-feeling silver-coated glass powder includes the following steps:

[0060] Take the silver-coated glass powder obtained in Example 1, add it to a citric acid aqueous solution with a concentration of 1 g / L and mix well. Stir at 30°C for chelation treatment for 2 h, filter, wash with water, and vacuum dry to obtain silver-coated glass powder with a strong skin feel.

[0061] The difference between Comparative Example 5 and Example 4 is that chelation treatment is not performed using octaaminopropyl cage-like polysilsesquioxane.

[0062] Comparative Example 6

[0063] A method for preparing a skin-feeling silver-coated glass powder includes the following steps:

[0064] The silver-coated glass powder obtained in Example 1 was added to an aqueous solution of octaaminopropyl cage-like polysilsesquioxane with a concentration of 2 g / L and mixed well. The mixture was stirred at 30°C for chelation treatment for 2 h, filtered, washed, and vacuum dried to obtain silver-coated glass powder with a strong skin feel.

[0065] The difference between Comparative Example 6 and Example 4 is that citric acid is not used for chelation treatment.

[0066] The skin-feeling silver-coated glass powders obtained in Examples 4-5 and Comparative Examples 5-6 were used to prepare eyeshadow compacts (the eyeshadow compact formula is: 34 parts skin-feeling silver-coated glass powder, 58 parts pigment, 0.5 parts isooctyl palmitate, 0.5 parts antioxidant vitamin E, and 7 parts emulsified silicone oil). The silky skin feel, skin adhesion, and presence of obvious agglomerates were examined, as well as the makeup lasting effect after 8 hours. The waterproof and antioxidant properties of the eyeshadows were also examined. The results are shown in Table 3.

[0067] Test methods for silky smoothness, skin adhesion, and absence of obvious agglomerates: 20 men and 20 women aged 20-40 years were selected. They applied eyeshadow in the same environment. The silky smoothness and skin adhesion of the eyeshadow powder were evaluated, rated on a scale of 1-5, with 1 being the worst and 5 being the best. The average value was taken. The presence of obvious agglomerates was also evaluated. The makeup lasting effect after 8 hours was also evaluated, rated on a scale of 1-5, with 1 being the worst and 5 being the best.

[0068] Water resistance test method: Apply eyeshadow powder to the surface of a glass substrate and test the water contact angle of the coating.

[0069] Antioxidant performance test method: Eyeshadow powder is applied to the surface of a glass substrate and placed in an oxidizing environment at 60°C and 75% relative humidity using a sunlight simulator to filter out ultraviolet rays with wavelengths below 290nm, providing a continuous UVA+UVB spectrum. The coating is then tested for Lab value.

[0070] Figure 2 A photograph of the eyeshadow powder made using the skin-feeling silver-coated glass powder of Example 4.

[0071] Depend on Figure 2 As can be seen, the eyeshadow powder made from the skin-feeling silver-coated glass powder of the present invention is silver in color and has a high gloss.

[0072] Table 3 Test Results

[0073]

[0074] As can be seen from Table 3, the high-skin-feel silver-coated glass powder of the present invention has a silky skin feel and good makeup-holding effect; it also has good waterproof properties and can maintain the luster of eyeshadow for a long time.

[0075] Comparative Example 7

[0076] The preparation of the skin-feeling silver-coated glass powder was carried out according to Example 1, except that the sodium hypophosphite in the silver plating solution was replaced with glucose, and the rest was the same as in Example 1.

[0077] Comparative Example 8

[0078] The preparation of the skin-feeling silver-coated glass powder was carried out according to Example 1, except that the potassium sodium tartrate in the silver plating solution was replaced with ammonia water, and the rest was the same as in Example 1.

[0079] The skin-feeling silver-coated glass powders obtained in Example 1 and Comparative Examples 7-8 were used to prepare eyeshadow compacts (the eyeshadow compact formula was: 34 parts skin-feeling silver-coated glass powder, 58 parts pigment, 0.5 parts isooctyl palmitate, 0.5 parts antioxidant vitamin E, and 7 parts emulsified silicone oil). The eyeshadow compacts were coated on the surface of a glass substrate, and the Lab value of the coating was measured. The results are shown in Table 4.

[0080] Table 4 Test Results

[0081]

[0082] As can be seen from Table 4, by using specific reducing agents and stabilizers in combination, chemical silver plating can produce silver-coated glass powder with good gloss.

[0083] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A type of eyeshadow with a strong skin-feel silver-coated glass powder, characterized in that, include: Flake-shaped silver-coated glass powder and spherical silver-coated glass powder, wherein the weight ratio of flake-shaped silver-coated glass powder to spherical silver-coated glass powder is 1-3:1; The particle size of flake-shaped silver-coated glass powder is 50-150 μm; the particle size of spherical silver-coated glass powder is 10-60 μm. The preparation method of the eyeshadow with strong skin feel silver-coated glass powder includes the following steps: mixing flake glass powder and spherical glass powder in a weight ratio of 1-3:1, and performing chemical silver plating to obtain strong skin feel silver-coated glass powder. During chemical silver plating, the plating solution contains 10-30 g / L silver nitrate, 20-50 g / L sodium hypophosphite, and 5-15 g / L potassium sodium tartrate, and the pH of the plating solution is 8.0-9.

0.

2. The eyeshadow powder with a strong skin-feel, silver-coated glass coating according to claim 1, characterized in that, Both the flake-shaped and spherical silver-coated glass powders are coated with a chelating layer, which is composed of octaaminopropyl cage-like polysilsesquioxane and citric acid.

3. The eyeshadow powder with a strong skin-feel, silver-coated glass coating according to claim 2, characterized in that, The method for coating a chelating layer on the surface of silver-coated glass powder includes the following steps: mixing flake-shaped silver-coated glass powder and spherical silver-coated glass powder with a mixed aqueous solution of citric acid and octaaminopropyl cage-like polysilsesquioxane, and performing a chelation treatment to obtain silver-coated glass powder with a chelating layer.

4. The eyeshadow powder with a strong skin-feel, silver-coated glass coating according to claim 3, characterized in that, The weight ratio of citric acid to octaaminopropyl cage-like polysilsesquioxane is 1:2-4.

5. The application of the eyeshadow-grade silver-coated glass powder as described in any one of claims 1-4 in eyeshadow.

6. A waterproof eyeshadow powder, characterized in that, include: Silicone oil and the skin-feeling silver-coated glass powder for eyeshadow as described in any one of claims 1-4.

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