A bio-based alcohol-based cosmetic gel and a preparation method thereof

Abstract

The application discloses a kind of biological base alcohol type beauty glue and preparation method thereof, it is related to adhesive technical field.The raw material composition of the beauty glue includes biological base polysiloxane, nano zinc oxide, biological base composite mildew inhibitor, hydrophobic fumed silica, titanium acid tetraisopropyl ester, methyl tributyl ketone oxime base silane, nano calcium carbonate, epoxy soybean oil, tea polyphenol;The biological base polysiloxane: raw material includes biological base 1,3-propylene glycol, hydroxyl end-capped polydimethylsiloxane, silane coupling agent;The biological base composite mildew inhibitor: raw material includes lecithin, epsilon-polylysine, tea tree oil, vitamin E.The preparation method of beauty glue includes preparing biological base polysiloxane, preparing biological base composite mildew inhibitor, basic filler dispersion, and preparing beauty glue finished product step.The biological base alcohol type beauty glue prepared in the application has good mildew-proof effect and excellent mechanical properties.

Description

Technical Field

[0001] This invention relates to the field of adhesive technology, specifically to a bio-based alcohol-based cosmetic adhesive and its preparation method. Background Technology

[0002] In the home decoration industry, beauty adhesive is a key material for filling gaps, sealing edges, and beautifying decorations. It is widely used in the joints between door and window frames and walls, tile gaps, cabinet corners, and other areas. Its performance directly affects the overall aesthetics and lifespan of the home decoration.

[0003] With the acceleration of urbanization and the increasing demand for higher quality home decoration, de-alcoholized silicone sealants have been widely used due to their excellent weather resistance and waterproof properties. However, with the increasing airtightness of modern residences, moisture easily accumulates in areas such as kitchens and bathrooms. Traditional de-alcoholized sealants are prone to the growth of molds such as Aspergillus niger and Aspergillus flavus on their surfaces, not only causing black spots that affect aesthetics but also damaging the sealant structure and leading to sealant failure. Furthermore, existing products mostly use petroleum-based polysiloxanes as the main raw material, resulting in high VOC emissions, which is inconsistent with the trend of green home decoration. Existing technology with publication number CN120424614A discloses a fully bio-based polyurethane elastic sealant and its preparation method. This prior art uses fully bio-based raw materials, which are environmentally friendly and renewable. Through optimized components and processes, the sealant possesses excellent water resistance, weather resistance, and mechanical properties; however, it does not include anti-mold design features, failing to meet the anti-mold requirements of home decoration. The prior art disclosed in CN118126674B is an anti-mildew environmentally friendly alcohol-based cosmetic adhesive. Although this prior art belongs to the category of alcohol-based cosmetic adhesives and focuses on the anti-mildew needs of high-humidity scenarios in home decoration, the main raw material is petroleum-based and there is no bio-based design, which does not conform to the trend of green home decoration.

[0004] In summary, although the existing technical solutions have improved some properties of bio-based cosmetic adhesives for home decoration to a certain extent, the following technical problems still exist: poor anti-mildew effect and inability to achieve excellent mechanical properties. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the prior art, the present invention provides a bio-based alcohol-type cosmetic gel and its preparation method, and achieves the following objectives: to prepare a bio-based alcohol-type cosmetic gel with good anti-mildew effect and excellent mechanical properties.

[0006] To achieve the above objectives, the following technical solution is adopted:

[0007] A bio-based alcohol-type cosmetic gel, by weight, comprises the following raw materials: 180-200 parts bio-based polysiloxane, 8-16 parts nano zinc oxide, 30-40 parts bio-based composite antifungal agent, 3-5 parts hydrophobic fumed silica, 0.8-1.5 parts tetraisopropyl titanate, 8-12 parts methyl tributanone oxime silane, 5-8 parts nano calcium carbonate, 10-15 parts epoxidized soybean oil, and 3-8 parts tea polyphenols.

[0008] The bio-based polysiloxane uses raw materials including bio-based 1,3-propanediol, hydroxyl-terminated polydimethylsiloxane, and silane coupling agent.

[0009] The bio-based composite antifungal agent uses raw materials including lecithin, ε-polylysine, tea tree oil, and vitamin E.

[0010] This invention also provides a method for preparing a bio-based alcohol-based cosmetic gel, comprising the following steps:

[0011] Step 1: Preparation of bio-based polysiloxane

[0012] Add bio-based 1,3-propanediol to anhydrous ethanol, heat to 50-60℃, and stir for 10-20 min to obtain a plant-derived hydroxyl solution. The mass ratio of bio-based 1,3-propanediol to anhydrous ethanol is (1.5-2):1.

[0013] Mix hydroxyl-terminated polydimethylsiloxane with anhydrous ethanol until homogeneous, turn on the stirrer at 300-400 rpm, heat to 60-70℃, add silane coupling agent, and stir for 30-40 min; after stirring, slowly add plant-derived hydroxyl solution at a rate of 1 drop / s; after the addition is complete, add tetrabutyl titanate, heat to 75-80℃, adjust the stirring speed to 500-600 rpm, and react for 4-4.5 h.

[0014] The mass ratio of hydroxyl-terminated polydimethylsiloxane to anhydrous ethanol is (6-7):1, the mass ratio of plant-derived hydroxyl solution to hydroxyl-terminated polydimethylsiloxane is 5:(13-15), and the amount of tetrabutyl titanate is 1.5-2% of the mass of the plant-derived hydroxyl solution.

[0015] After the reaction is complete, the reaction product is rotary evaporated for 30-40 minutes and then vacuum dried to obtain bio-based polysiloxane.

[0016] The rotary evaporation treatment is carried out at a temperature of 60-65℃ and a vacuum degree of -0.08MPa to -0.09MPa. The vacuum drying process is carried out at a temperature of 80-90℃ and a vacuum degree of -0.09MPa for 2-3 hours. The silane coupling agent used is KH560, and the dosage is 10-12% of the mass of hydroxyl-terminated polydimethylsiloxane.

[0017] Step 2: Preparation of bio-based composite antifungal agent

[0018] Add lecithin to the ε-polylysine solution and stir for 10-15 minutes at a speed of 300-400 rpm. Then, slowly add tea tree oil dropwise, increasing the stirring speed to 800-1000 rpm during the addition process to obtain a preliminary emulsion. The amount of lecithin used is 1-1.2% of the mass of the ε-polylysine solution, and the mass ratio of tea tree oil to ε-polylysine solution is 1:(12-20).

[0019] The preliminary emulsion was homogenized under high pressure at 20-30 MPa, 2-3 times. The pH of the system was adjusted to 5.5-6.0 with lactic acid, vitamin E was added, and the mixture was stirred for 5-10 minutes at 300-400 rpm. After stirring, vacuum degassing was performed at -0.08 MPa and 30-40℃ for 10-20 minutes to obtain the composite antifungal agent. The amount of vitamin E used was 0.2-0.3% of the mass of the preliminary emulsion.

[0020] The ε-polylysine solution: ε-polylysine is dissolved in bio-based 1,3-propanediol to prepare an ε-polylysine solution with a mass fraction of 10%-12%.

[0021] Step 3: Dispersion of basic filler

[0022] Add bio-based polysiloxane to a stirred tank, start stirring at 500-600 rpm, heat to 40-50℃, slowly add hydrophobic fumed silica, and stir for 10-15 minutes; then increase the stirring speed to 800-1000 rpm, add nano zinc oxide, and stir for 15-20 minutes, then add nano calcium carbonate and stir for 15-20 minutes; then lower the temperature inside the tank to 35-40℃, adjust the stirring speed to 600-700 rpm, slowly add epoxidized soybean oil, and stir for 10-15 minutes; add tea polyphenols and continue stirring for 15-20 minutes.

[0023] Step 4: Obtain the finished beauty gel

[0024] Maintain the reactor temperature at 35-40℃ and the stirring speed at 500-600 rpm. Add the bio-based composite antifungal agent dropwise at a rate of 2-3 drops / s. After the addition is complete, stir for 20-25 minutes. After stirring, purge with nitrogen for protection, add tetraisopropyl titanate, and stir for 10-15 minutes. Then, adjust the stirring speed to 400-500 rpm and slowly add methyl tributanone oxime silane dropwise at a rate of 1-2 drops / s. After the addition is complete, raise the temperature to 45-50℃ and maintain the reaction temperature for 30-35 minutes. After the reaction is complete, perform vacuum degassing, controlling the vacuum level at -0.09 MPa to -0.095 MPa, maintaining the temperature at 45-50℃, and adjusting the stirring speed to 200-300 rpm. Perform vacuum degassing for 25-35 minutes to obtain the finished cosmetic gel.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) In this invention, the hydroxyl groups in the bio-based polysiloxane molecular chain react fully with the crosslinking agent to form a stable three-dimensional network, and interact with other bio-based components to improve the tensile bonding strength, elongation at break and other mechanical properties of the beauty adhesive; the bio-based raw materials replace petroleum-based monomers, which greatly reduces VOC emissions and meets the environmental protection requirements of home decoration scenarios. At the same time, the hydroxyl structure gives the colloid good film-forming properties and substrate adhesion, and is suitable for various home decoration substrates such as wood and ceramic tiles.

[0027] (2) The bio-based composite antifungal agent in this invention is derived from natural biological raw materials. It forms a broad-spectrum antibacterial system through ε-polylysine and tea tree essential oil, which has a significant inhibitory effect on common molds in home decoration such as Aspergillus niger and Aspergillus flavus. Nano zinc oxide, as an inorganic antifungal component, forms an "inorganic + organic" antifungal complementary relationship with the bio-based composite antifungal agent, which prolongs the antifungal effect of the beauty glue.

[0028] (3) The bio-based alcohol-based cosmetic adhesive of the present invention has excellent mechanical properties. The prepared cosmetic adhesive has a tensile bond strength of 2.6-2.8 MPa, an elongation at break of 336-364%, and a Shore A hardness of 33-38.

[0029] (4) The bio-based alcohol-based cosmetic gel of the present invention has excellent anti-mildew effect. After 120 days of curing, the prepared cosmetic gel still maintains an anti-mildew level of 0. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0031] Example 1: A bio-based alcohol-based cosmetic gel and its preparation method

[0032] A bio-based alcohol-type beauty gel, by weight, comprises the following raw materials: 180 parts bio-based polysiloxane, 16 parts nano zinc oxide, 40 parts bio-based composite antifungal agent, 5 parts hydrophobic fumed silica, 0.8 parts tetraisopropyl titanate, 12 parts methyl tributanone oxime silane, 5 parts nano calcium carbonate, 15 parts epoxidized soybean oil, and 3 parts tea polyphenols.

[0033] The bio-based polysiloxane uses raw materials including bio-based 1,3-propanediol, hydroxyl-terminated polydimethylsiloxane, and silane coupling agent.

[0034] The bio-based composite antifungal agent uses raw materials including lecithin, ε-polylysine, tea tree oil, and vitamin E.

[0035] A method for preparing a bio-based alcohol-based cosmetic gel includes the following steps:

[0036] Step 1: Preparation of bio-based polysiloxane

[0037] Bio-based 1,3-propanediol was added to anhydrous ethanol at a mass ratio of 1.5:1. The mixture was heated to 50°C and stirred for 20 min to obtain a plant-derived hydroxyl solution.

[0038] Hydroxyl-terminated polydimethylsiloxane was mixed evenly with anhydrous ethanol at a mass ratio of 6:1. The mixture was stirred at 300 rpm and heated to 60°C. A silane coupling agent was added and the mixture was stirred for 40 min. After stirring, a plant-derived hydroxyl solution was slowly added dropwise at a mass ratio of 5:13 to hydroxyl-terminated polydimethylsiloxane at a dropping rate of 1 drop / s. After the addition was complete, tetrabutyl titanate was added at a mass ratio of 1.5% of the plant-derived hydroxyl solution mass. The mixture was heated to 75°C and stirred at 500 rpm for 4.5 h.

[0039] After the reaction was completed, the reaction product was rotary evaporated for 30 minutes and then vacuum dried to obtain bio-based polysiloxane.

[0040] The rotary evaporation treatment was carried out at a temperature of 60°C and a vacuum degree of -0.08 MPa. The vacuum drying process was carried out at a temperature of 80°C and a vacuum degree of -0.09 MPa for 3 hours. The silane coupling agent used was KH560, and the amount used was 10% of the mass of hydroxyl-terminated polydimethylsiloxane.

[0041] Step 2: Preparation of bio-based composite antifungal agent

[0042] Lecithin was added to an ε-polylysine solution at a concentration of 1% of the ε-polylysine solution mass. The mixture was stirred for 10 minutes at 400 rpm. Then, tea tree oil was slowly added dropwise at a mass ratio of 1:12 to the ε-polylysine solution. During the addition process, the stirring speed was increased to 800 rpm to obtain a preliminary emulsion. The preliminary emulsion was homogenized under high pressure at 20 MPa for three cycles. The pH of the system was adjusted to 5.5 with lactic acid. Vitamin E was added at a concentration of 0.2% of the preliminary emulsion mass. The mixture was stirred for 5 minutes at 400 rpm. After stirring, vacuum degassing was performed at a vacuum of -0.08 MPa and a temperature of 30°C for 20 minutes to obtain a composite antifungal agent.

[0043] The ε-polylysine solution: ε-polylysine is dissolved in bio-based 1,3-propanediol to prepare an ε-polylysine solution with a mass fraction of 10%-12%.

[0044] Step 3: Dispersion of basic filler

[0045] Add bio-based polysiloxane to a stirred tank, start stirring at 500 rpm, heat to 40°C, slowly add hydrophobic fumed silica, and stir for 15 min; then increase the stirring speed to 800 rpm, add nano zinc oxide, and stir for 20 min, then add nano calcium carbonate and stir for 20 min; then lower the temperature inside the tank to 35°C, adjust the stirring speed to 600 rpm, slowly add epoxidized soybean oil, and stir for 15 min; add tea polyphenols and continue stirring for 20 min.

[0046] Step 4: Obtain the finished beauty gel

[0047] Maintain the reactor temperature at 35℃ and the stirring speed at 500 rpm. Add the bio-based composite antifungal agent dropwise at a rate of 2 drops / s. After the addition is complete, stir for 25 minutes. After stirring, purge with nitrogen for protection, add tetraisopropyl titanate, and stir for 15 minutes. Then, adjust the stirring speed to 400 rpm and slowly add methyl tributanone oxime silane dropwise at a rate of 1 drop / s. After the addition is complete, raise the temperature to 45℃ and maintain the reaction temperature for 35 minutes. After the reaction is complete, perform vacuum degassing, controlling the vacuum level at -0.09 MPa, the temperature at 45℃, and the stirring speed at 200 rpm. Perform vacuum degassing for 35 minutes to obtain the finished cosmetic gel.

[0048] Example 2: A bio-based alcohol-based cosmetic gel and its preparation method

[0049] A bio-based alcohol-type beauty gel, by weight, comprises the following raw materials: 190 parts bio-based polysiloxane, 12 parts nano zinc oxide, 35 parts bio-based composite antifungal agent, 4 parts hydrophobic fumed silica, 1.2 parts tetraisopropyl titanate, 10 parts methyl tributanone oxime silane, 7 parts nano calcium carbonate, 12 parts epoxidized soybean oil, and 5 parts tea polyphenols.

[0050] The bio-based polysiloxane uses raw materials including bio-based 1,3-propanediol, hydroxyl-terminated polydimethylsiloxane, and silane coupling agent.

[0051] The bio-based composite antifungal agent uses raw materials including lecithin, ε-polylysine, tea tree oil, and vitamin E.

[0052] A method for preparing a bio-based alcohol-based cosmetic gel includes the following steps:

[0053] Step 1: Preparation of bio-based polysiloxane

[0054] Bio-based 1,3-propanediol was added to anhydrous ethanol at a mass ratio of 1.8:1. The mixture was heated to 55°C and stirred for 15 min to obtain a plant-derived hydroxyl solution.

[0055] Hydroxyl-terminated polydimethylsiloxane was mixed evenly with anhydrous ethanol at a mass ratio of 6.5:1. Stirring was started at 400 rpm, and the temperature was raised to 70°C. Silane coupling agent was added, and stirring was carried out for 40 min. After stirring, plant-derived hydroxyl solution was slowly added dropwise at a mass ratio of 5:14 to hydroxyl-terminated polydimethylsiloxane at a dropping rate of 1 drop / s. After the addition was complete, tetrabutyl titanate was added at a mass ratio of 1.8% of the mass of the plant-derived hydroxyl solution. The temperature was raised to 80°C, and the stirring speed was adjusted to 600 rpm. The reaction was carried out for 4.5 h.

[0056] After the reaction was completed, the reaction product was rotary evaporated for 40 min; then vacuum dried to obtain bio-based polysiloxane.

[0057] The rotary evaporation treatment was carried out at a temperature of 65°C and a vacuum degree of -0.09 MPa. The vacuum drying process was carried out at a temperature of 90°C and a vacuum degree of -0.09 MPa for 2.5 hours. The silane coupling agent used was KH560, and the dosage was 12% of the mass of hydroxyl-terminated polydimethylsiloxane.

[0058] Step 2: Preparation of bio-based composite antifungal agent

[0059] Lecithin was added to an ε-polylysine solution at a concentration of 1.2% of the solution's mass. The mixture was stirred for 15 minutes at 400 rpm. Then, tea tree oil was slowly added dropwise at a mass ratio of 1:16 to the ε-polylysine solution. During the addition, the stirring speed was increased to 900 rpm to obtain a preliminary emulsion. The preliminary emulsion was then homogenized under high pressure at 25 MPa for three cycles. The pH of the system was adjusted to 6.0 with lactic acid. Vitamin E was added at a concentration of 0.3% of the preliminary emulsion's mass. The mixture was stirred for 10 minutes at 300 rpm. After stirring, the mixture was degassed under vacuum at -0.08 MPa and 40°C for 20 minutes to obtain a composite antifungal agent.

[0060] The ε-polylysine solution: ε-polylysine is dissolved in bio-based 1,3-propanediol to prepare an ε-polylysine solution with a mass fraction of 10%-12%.

[0061] Step 3: Dispersion of basic filler

[0062] Add bio-based polysiloxane to a stirred tank, start stirring at 600 rpm, heat to 50°C, slowly add hydrophobic fumed silica, and stir for 15 min; then increase the stirring speed to 900 rpm, add nano zinc oxide, and stir for 20 min, then add nano calcium carbonate and stir for 20 min; then lower the temperature inside the tank to 40°C, adjust the stirring speed to 700 rpm, slowly add epoxidized soybean oil, and stir for 15 min; add tea polyphenols and continue stirring for 20 min.

[0063] Step 4: Obtain the finished beauty gel

[0064] Maintain the reactor temperature at 40℃ and the stirring speed at 500 rpm. Add the bio-based composite antifungal agent dropwise at a rate of 2 drops / s. After the addition is complete, stir for 25 minutes. After stirring, purge with nitrogen for protection, add tetraisopropyl titanate, and stir for 15 minutes. Then, adjust the stirring speed to 400 rpm and slowly add methyl tributanone oxime silane dropwise at a rate of 1 drop / s. After the addition is complete, raise the temperature to 50℃ and maintain the reaction temperature for 35 minutes. After the reaction is complete, perform vacuum degassing, controlling the vacuum level at -0.095 MPa, the temperature at 50℃, and the stirring speed at 300 rpm. Perform vacuum degassing for 35 minutes to obtain the finished cosmetic gel.

[0065] Example 3: A bio-based alcohol-based cosmetic gel and its preparation method

[0066] A bio-based alcohol-type beauty gel, by weight, comprises the following raw materials: 200 parts bio-based polysiloxane, 8 parts nano zinc oxide, 30 parts bio-based composite antifungal agent, 3 parts hydrophobic fumed silica, 1.5 parts tetraisopropyl titanate, 8 parts methyl tributanone oxime silane, 8 parts nano calcium carbonate, 10 parts epoxidized soybean oil, and 8 parts tea polyphenols.

[0067] The bio-based polysiloxane uses raw materials including bio-based 1,3-propanediol, hydroxyl-terminated polydimethylsiloxane, and silane coupling agent.

[0068] The bio-based composite antifungal agent uses raw materials including lecithin, ε-polylysine, tea tree oil, and vitamin E.

[0069] A method for preparing a bio-based alcohol-based cosmetic gel includes the following steps:

[0070] Step 1: Preparation of bio-based polysiloxane

[0071] Bio-based 1,3-propanediol was added to anhydrous ethanol at a mass ratio of 2:1. The mixture was heated to 60°C and stirred for 10 min to obtain a plant-derived hydroxyl solution.

[0072] Hydroxyl-terminated polydimethylsiloxane was mixed evenly with anhydrous ethanol at a mass ratio of 7:1. The mixture was stirred at 400 rpm and heated to 70°C. A silane coupling agent was added and the mixture was stirred for 30 min. After stirring, a plant-derived hydroxyl solution was slowly added dropwise at a mass ratio of 5:15 to hydroxyl-terminated polydimethylsiloxane at a dropping rate of 1 drop / s. After the addition was complete, tetrabutyl titanate was added at a concentration of 2% of the mass of the plant-derived hydroxyl solution. The mixture was heated to 80°C and stirred at 600 rpm for 4 h.

[0073] After the reaction was completed, the reaction product was rotary evaporated for 40 minutes and then vacuum dried to obtain bio-based polysiloxane.

[0074] The rotary evaporation treatment was carried out at a temperature of 65°C and a vacuum degree of -0.09 MPa. The vacuum drying process was carried out at a temperature of 90°C and a vacuum degree of -0.09 MPa for 2 hours. The silane coupling agent used was KH560, and the dosage was 12% of the mass of hydroxyl-terminated polydimethylsiloxane.

[0075] Step 2: Preparation of bio-based composite antifungal agent

[0076] Lecithin was added to an ε-polylysine solution at a concentration of 1.2% of the solution's mass. The mixture was stirred for 15 minutes at 300 rpm. Then, tea tree oil was slowly added dropwise at a mass ratio of 1:20 to the ε-polylysine solution. During the addition, the stirring speed was increased to 1000 rpm to obtain a preliminary emulsion. The preliminary emulsion was then homogenized under high pressure at 30 MPa twice. The pH of the system was adjusted to 6.0 with lactic acid. Vitamin E was added at a concentration of 0.3% of the preliminary emulsion's mass. The mixture was stirred for 10 minutes at 300 rpm. After stirring, the mixture was degassed under vacuum at -0.08 MPa and 40°C for 10 minutes to obtain a composite antifungal agent.

[0077] The ε-polylysine solution: ε-polylysine is dissolved in bio-based 1,3-propanediol to prepare an ε-polylysine solution with a mass fraction of 10%-12%.

[0078] Step 3: Dispersion of basic filler

[0079] Add bio-based polysiloxane to a stirred tank, start stirring at 600 rpm, heat to 50°C, slowly add hydrophobic fumed silica, and stir for 10 min; then increase the stirring speed to 1000 rpm, add nano zinc oxide, and stir for 15 min, then add nano calcium carbonate and stir for 15 min; then lower the temperature inside the tank to 40°C, adjust the stirring speed to 700 rpm, slowly add epoxidized soybean oil, and stir for 10 min; add tea polyphenols and continue stirring for 15 min.

[0080] Step 4: Obtain the finished beauty gel

[0081] Maintain the reactor temperature at 40℃ and the stirring speed at 600 rpm. Add the bio-based composite antifungal agent dropwise at a rate of 3 drops / s. After the addition is complete, stir for 20 minutes. After stirring, purge with nitrogen for protection, add tetraisopropyl titanate, and stir for 10 minutes. Then, adjust the stirring speed to 500 rpm and slowly add methyl tributanone oxime silane dropwise at a rate of 2 drops / s. After the addition is complete, raise the temperature to 50℃ and maintain the reaction temperature for 30 minutes. After the reaction is complete, perform vacuum degassing, controlling the vacuum level at -0.095 MPa, the temperature at 50℃, and the stirring speed at 300 rpm. Perform vacuum degassing for 25 minutes to obtain the finished cosmetic gel.

[0082] Comparative Example 1

[0083] A bio-based alcohol-type beauty gel, by weight, comprises the following raw materials: 190 parts bio-based polysiloxane, 12 parts nano zinc oxide, 4 parts hydrophobic fumed silica, 1.2 parts tetraisopropyl titanate, 10 parts methyl tributanone oxime silane, 7 parts nano calcium carbonate, 12 parts epoxidized soybean oil, and 5 parts tea polyphenols.

[0084] The bio-based polysiloxane uses raw materials including bio-based 1,3-propanediol, hydroxyl-terminated polydimethylsiloxane, and silane coupling agent.

[0085] A method for preparing a bio-based alcohol-based cosmetic gel includes the following steps:

[0086] Step 1: Preparation of bio-based polysiloxane

[0087] This step is the same as the "Preparation of bio-based polysiloxane" step in Example 2.

[0088] Step 2: Dispersion of basic filler

[0089] This step is the same as the "basic filler dispersion" step in Example 2.

[0090] Step 3: Obtain the finished beauty gel

[0091] Maintain the reactor temperature at 40℃, stir at 500 rpm, and purge with nitrogen. Add tetraisopropyl titanate and stir for 15 minutes. Then, adjust the stirring speed to 400 rpm and slowly add methyl tributanone oxime silane at a rate of 1 drop / s. After the addition is complete, raise the temperature to 50℃ and maintain the reaction temperature for 35 minutes. After the reaction is complete, perform vacuum degassing, controlling the vacuum level at -0.095 MPa, the temperature at 50℃, and the stirring speed at 300 rpm. Perform vacuum degassing for 35 minutes to obtain the finished cosmetic gel.

[0092] Example 4 Performance Testing

[0093] (a) The tensile bond strength of the cosmetic adhesives prepared in Examples 1-3 and Comparative Example 1 was tested according to the test method specified in GB / T13477.8-2017; the elongation at break was tested according to the test method specified in GB / T528-2009; and the Shore hardness was tested according to the test method specified in GB / T531.1-2009. The specific test results are shown in Table 1.

[0094] Table 1

[0095]

[0096] As shown in Table 1, the tensile bond strength of the cosmetic adhesives prepared in Examples 1-3 is 2.6-2.8 MPa, the elongation at break is 336-364%, and the Shore A hardness is 33-38, which proves that the bio-based alcohol-type cosmetic adhesives prepared in this invention have excellent mechanical properties.

[0097] (II) The anti-mold effects of the cosmetic adhesives prepared in Examples 1-3 and Comparative Example 1 were tested according to the test methods specified in GB / T 1741-2020. Typical molds such as Aspergillus niger, Aspergillus flavus, and Trichoderma were selected. The temperature was 30°C and the relative humidity was 60%. The anti-mold levels were recorded at the initial, 30th, 60th, and 120th days. The specific test results are shown in Table 2.

[0098] Table 2

[0099]

[0100] As shown in Table 2, the cosmetic adhesives prepared in Examples 1-3 maintained a mold resistance level of 0 after 120 days of curing, demonstrating a significantly enhanced mold resistance compared to the sealant prepared in Comparative Example 1. This proves that the bio-based alcohol-based cosmetic adhesive prepared in this invention has excellent mold resistance.

[0101] Obviously, there are many other possible implementation methods under the concept of this invention. It should be stated here that any changes made under the inventive concept of this invention will fall within the protection scope of this invention.

Claims

1. A bio-based alcohol-based cosmetic gum, characterized in that: The raw material weight percentage composition of the cosmetic glue is: bio-based polysiloxane 180-200 parts, nano zinc oxide 8-16 parts, bio-based composite mildew-proof agent 30-40 parts, hydrophobic fumed silica 3-5 parts, titanium isopropyl titanate 0.8-1.5 parts, methyl tributyl ketone oxime silane 8-12 parts, nano calcium carbonate 5-8 parts, epoxy soybean oil 10-15 parts, tea polyphenol 3-8 parts; The bio-based polysiloxane: uniformly mix hydroxyl-terminated polydimethylsiloxane with anhydrous ethanol, start stirring, and heat to 60-70 DEG C, then add silane coupling agent and stir for 30-40 min; then slowly drop in plant-derived hydroxyl solution, after dropwise addition is completed, add tetrabutyl titanate, heat to 75-80 DEG C, and react for 4-4.5 h; after the reaction is completed, carry out rotary evaporation treatment and vacuum drying to obtain bio-based polysiloxane; the plant-derived hydroxyl solution: add bio-based 1,3-propanediol into anhydrous ethanol, the mass ratio of bio-based 1,3-propanediol to anhydrous ethanol is (1.5-2):1, heat to 50-60 DEG C, and stir for 10-20 min to obtain the plant-derived hydroxyl solution; The bio-based composite mildew-proof agent: add lecithin into ε-polylysine solution, stir for 10-15 min, then slowly drop in tea tree oil to obtain a preliminary emulsion; carry out high-pressure homogenization on the preliminary emulsion, the pressure is 20-30 MPa, and the homogenization is carried out 2-3 times; adjust the pH of the system to 5.5-6.0 with lactic acid, add vitamin E, the amount of vitamin E is 0.2-0.3% of the mass of the preliminary emulsion, and stir for 5-10 min; after stirring is completed, carry out vacuum degassing to obtain the composite mildew-proof agent.

2. The bio-based alcohol-based cosmetic gum according to claim 1, characterized in that: The silane coupling agent is KH560, and the amount is 10-12% of the mass of the hydroxyl-terminated polydimethylsiloxane; the mass ratio of the hydroxyl-terminated polydimethylsiloxane to anhydrous ethanol is (6-7):1; the mass ratio of the plant-derived hydroxyl solution to the hydroxyl-terminated polydimethylsiloxane is 5:(13-15); and the amount of tetrabutyl titanate is 1.5-2% of the mass of the plant-derived hydroxyl solution.

3. The bio-based alcohol-based cosmetic gum according to claim 1, characterized in that: The ε-polylysine solution: dissolve ε-polylysine in bio-based 1,3-propanediol to prepare an ε-polylysine solution with a mass fraction of 10%-12%.

4. The bio-based alcohol-based cosmetic gum according to claim 1, characterized in that: The amount of lecithin is 1-1.2% of the mass of the ε-polylysine solution; and the mass ratio of tea tree oil to the ε-polylysine solution is 1:(12-20).

5. The method for preparing a bio-based alcohol-based cosmetic gel according to claim 1, characterized in that: The steps include preparing bio-based polysiloxane, preparing bio-based composite mildew-proof agent, dispersing base filler, and obtaining cosmetic glue finished product.

6. The method for preparing a bio-based alcohol-based cosmetic gel according to claim 5, characterized in that: The base filler dispersion: the bio-based polysiloxane is added into the stirred tank, the stirring is started, the temperature is raised to 40-50℃, the hydrophobic fumed silica is slowly added, and the stirring is carried out for 10-15 min; then the stirring speed is increased to 800-1000 rpm, the nano zinc oxide is added, the stirring is carried out for 15-20 min, the nano calcium carbonate is added, and the stirring is carried out for 15-20 min; then the temperature in the tank is reduced to 35-40℃, the stirring speed is adjusted to 600-700 rpm, the epoxy soybean oil is slowly added, and the stirring is carried out for 10-15 min; the tea polyphenol is added, and the stirring is continued for 15-20 min.

7. The method for preparing a bio-based alcohol-based cosmetic gel according to claim 5, characterized in that: The prepared cosmetic glue finished product: the temperature in the tank is kept at 35-40℃, the bio-based composite mildew-proof agent is dropped, and the stirring is carried out for 20-25 min; after the stirring is finished, the nitrogen protection is carried out, the titanium acid tetraisopropyl ester is added, the stirring is carried out for 10-15 min, then the stirring speed is adjusted to 400-500 rpm, the methyl tributyl ketone oxime silane is slowly added dropwise; after the dropwise addition is completed, the temperature is raised to 45-50℃, the reaction is carried out for 30-35 min; after the reaction is finished, the vacuum degassing is carried out, and the cosmetic glue finished product is obtained.

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