Silica gel spraying glue and preparation method thereof

Abstract

The invention relates to the technical field of spray coating glue processing, in particular to silica gel spray coating glue and a preparation method thereof, the silica gel spray coating glue comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone oil, 20-30 parts of white carbon black, 2-3 parts of a silane coupling agent, 0.1-0.5 part of a platinum catalyst, 10-15 parts of heat insulation filler, 2-4 parts of an antibacterial agent, 4-6 parts of fluorine-containing silane, 5-10 parts of a binder and 3-5 parts of a surfactant; the component B is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone oil, 20-30 parts of white carbon black, 5-10 parts of hydrogen-containing silicone oil and 0.05-0.1 part of an inhibitor, the silica gel spray coating glue prepared by adopting the formula can be directly coated on the surface of a cup to form a silica gel protective layer, so that the situation that dirt is hidden in a gap between the silica gel layer and the cup is avoided, and the service life of the cup is prolonged. Meanwhile, the silica gel protection layer can be tightly combined with the surface of the cup to form a firm protection layer, and glass fragments can be effectively prevented from splashing when the cup is broken.

Description

Technical Field

[0001] This application relates to the technical field of spray coating adhesive processing, and more specifically, to a silicone spray coating adhesive and a preparation method thereof. Background Art

[0002] Silicone cup sleeves have a certain degree of flexibility and buffering ability, and can protect the cup from damage caused by collisions and drops to a certain extent. At the same time, silicone cup sleeves can effectively isolate the heat of hot water in the glass cup and prevent users from being scalded. Their heat insulation performance makes it so that even when boiling water is poured in, the hand does not feel hot when touching the cup sleeve.

[0003] However, during long-term use, it is easy for dirt and bacteria to accumulate between the glass cup and the silicone glass sleeve. It is rather troublesome to regularly disassemble the cup sleeve for thorough cleaning to maintain hygiene. Moreover, if the cup is made of glass, when the glass cup breaks, the silicone cup sleeve cannot well prevent the glass shards from splashing. Summary of the Invention

[0004] In order to solve the problem that it is easy for dirt and bacteria to accumulate between the glass cup and the silicone glass sleeve during long-term use, this application provides a silicone spray coating adhesive and a preparation method thereof. In the first aspect, this application provides a silicone spray coating adhesive, adopting the following technical solution: A silicone spray coating adhesive, the silicone spray coating adhesive includes component A and component B. Among them, component A is prepared from raw materials with the following weight percentages: 100 parts of vinyl silicone oil 20 - 30 parts of fumed silica 2 - 3 parts of silane coupling agent 0.1 - 0.5 parts of platinum catalyst 10 - 15 parts of heat insulation filler 2 - 4 parts of antibacterial agent 4 - 6 parts of fluorosilane 5 - 10 parts of binder 3 - 5 parts of surfactant Component B is prepared from raw materials with the following weight percentages: 100 parts of vinyl silicone oil 20 - 30 parts of fumed silica 5 - 10 parts of hydrogen-containing silicone oil 0.05 - 0.1 part of inhibitor.

[0005] By adopting the above scheme, the silicone spraying adhesive can be directly coated on the surface of the cup to form a silicone protective layer, avoiding the existence of gaps between the silicone layer and the cup to accumulate dirt. At the same time, this silicone protective layer can be tightly combined with the cup surface to form a strong protective layer, which can effectively prevent the glass fragments from splashing when the cup is broken. Moreover, the surface of the coating formed by the spraying adhesive is smooth, reducing the adhesion of stains, making the cup surface easier to clean and avoiding the pollution of contaminants.

[0006] In this application, by using vinyl silicone oil as the matrix material, the coating is given good flexibility and buffering ability, further enhancing the wrapping and fixing of the cup. Fumed silica is used as a reinforcing agent to improve the mechanical strength and wear resistance of the coating. The two work together to make the coating have both good flexibility and sufficient strength. At the same time, fluorosilane and surfactant endow the coating with low surface energy, making it have good hydrophobicity and easy cleanability, and the dirt is more easily washed off. The addition of the binder significantly improves the bonding strength between the silicone protective layer and the cup surface, so that when the cup is broken, the glass fragments can be better adhered by the silicone layer, effectively preventing the glass slag from splashing. The antibacterial agent provides the antibacterial property of the coating to prevent the growth of bacteria. The heat-insulating filler enhances the heat-insulating effect of the coating, effectively isolating the heat of the hot water in the glass cup and preventing the user from being scalded.

[0007] Preferably, the binder is prepared by the following method: A: Mix epoxy resin with multifunctional acrylate monomer and catalyst, then heat up to 80 - 90 °C, keep warm and stir for 30 - 60 min, add acrylate oligomer and initiator, heat up to 100 - 110 °C, and react for 2 - 3 h to obtain the reactant; B: Stir the reactant and diluent evenly to obtain the binder.

[0008] Through the combination of epoxy resin and multifunctional acrylate monomer, high-strength bonding performance is provided, enabling the silicone protective layer to be stably bonded to the cup surface, ensuring that when the cup is broken, the glass fragments can be better adhered by the silicone layer, effectively preventing the glass slag from splashing. At the same time, the addition of the multifunctional acrylate monomer increases the crosslinking density of the coating, thereby improving the hardness and wear resistance of the coating, which is beneficial to extending the service life of the silicone protective layer. The addition of acrylate oligomer endows the coating with good flexibility and buffering ability, further enhancing the wrapping and fixing of the glass fragments, helping to absorb the impact force and reducing the risk of glass fragment splashing. Through the preparation of the diluent, the viscosity of the binder is reduced, enabling it to be evenly mixed with other raw materials, making the silicone spraying adhesive more evenly coated on the cup surface to form a continuous and uniform protective layer, avoiding the gaps existing between the traditional silicone cup sleeve and the cup, and reducing the possibility of accumulating dirt.

[0009] Preferably, the raw materials used for preparing the binder are in the following weight parts: 40 - 50 parts of epoxy resin 5 - 10 parts of polyfunctional acrylate monomer 0.2 - 0.4 parts of catalyst 8 - 10 parts of acrylate oligomer 0.5 - 0.8 parts of initiator 30 - 40 parts of diluent.

[0010] By adopting the above technical solution and optimizing the usage weights of each raw material, the epoxy resin, polyfunctional acrylate monomer, and acrylate oligomer can fully react, resulting in an adhesive with good bonding performance and heat insulation performance.

[0011] Preferably, the polyfunctional acrylate monomer includes at least one of trimethylolpropane triacrylate, pentaerythritol triacrylate, dipropylene glycol diacrylate, 1,6 - hexanediol diacrylate, bisphenol A diacrylate, and ethoxylated bisphenol fluorene diacrylate.

[0012] By adopting the above polyfunctional acrylate monomer, a highly cross - linked network structure can be formed with the epoxy resin, significantly improving the bonding performance of the adhesive, facilitating the improvement of the bonding strength between the silicone spray - coated adhesive and the cup, and at the same time enhancing the mechanical strength and durability of the silicone protective layer, and prolonging its service life.

[0013] Preferably, the epoxy resin is at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol E epoxy resin, and polyphenolic epoxy resin.

[0014] By adopting the above epoxy resin, the bonding performance of the adhesive can be improved in one step, thereby enhancing the bonding performance of the silicone spray - coated adhesive. At the same time, the heat insulation performance of the silicone spray - coated adhesive can also be improved.

[0015] Preferably, the surfactant is composed of polyoxyethylene cetyl ether and polyethylene glycol siloxane in a weight ratio of 2:(3 - 5).

[0016] Polyoxyethylene cetyl ether can significantly reduce the surface tension of the liquid, making it easier for the silicone spray - coated adhesive to spread on the cup surface and form a uniform coating; polyethylene glycol siloxane has good wettability and dispersibility, further reducing the surface tension, while improving the uniformity and adhesion of the coating. The combined use of the two can improve the wettability and dispersibility of the silicone spray - coated adhesive, making the coating more evenly cover the cup surface and reducing coating defects caused by uneven surface tension. At the same time, polyoxyethylene cetyl ether imparts a certain degree of hydrophobicity to the coating, reducing the attachment of dirt and making the cup easier to clean; polyethylene glycol siloxane further reduces the surface energy of the coating, making it more difficult for dirt to adhere and facilitating cleaning.

[0017] Preferably, the fluorosilane includes at least one of tridecafluorooctyltriethoxysilane, perfluorooctyltriethoxysilane, heptadecafluorodecyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, and perfluorodecyltrimethoxysilane.

[0018] By adopting the above technical solution, the anti-fouling performance of the spraying adhesive is further improved, the adhesion of dirt and water stains is reduced, the easy-cleaning property is enhanced, and at the same time, the adhesion between the spraying adhesive and the surface of the cup is improved to ensure that the coating adheres firmly and prevent the glass slag from splashing.

[0019] Preferably, the vinyl content of the vinyl silicone oil is 0.4-1.2%, and the viscosity is 1000-10000 mPa·s.

[0020] When the vinyl content is between 0.4-1.2%, a moderate crosslinking density can be provided. When the vinyl content is moderate, the hardness and tear strength of the silicone rubber reach a balance, neither being too soft nor too brittle. When the viscosity is in the range of 1000-10000 mPa·s, it can ensure that the silicone spraying adhesive has good fluidity and operability, and at the same time maintain sufficient tensile strength and elasticity after curing. That is, by optimizing the viscosity and vinyl content of the vinyl silicone oil, the silicone spraying adhesive can have good flexibility after curing, absorb the impact force received by the cup, and reduce the risk of the glass cup breaking.

[0021] Preferably, the hydrogen content of the hydrogen-containing silicone oil is 0.1-0.5%, and the viscosity is 100-1000 mPa·s.

[0022] By adopting the above technical solution, optimizing the hydrogen content and viscosity of the hydrogen-containing silicone oil can provide a moderate crosslinking density, endow the coating with good tensile strength and hardness, and at the same time enable the silicone spraying adhesive to maintain a certain elongation after crosslinking, improve the flexibility and impact resistance of the coating, help absorb the impact force received by the cup, and reduce the risk of the glass cup breaking.

[0023] In a second aspect, the present application provides a preparation method of a silicone spraying adhesive, adopting the following technical solution: A preparation method of a silicone spraying adhesive includes the following steps: 1) Prepare component A: Put vinyl polysiloxane, fumed silica, heat-insulating filler, silane coupling agent, and antibacterial agent into a disperser, heat up to 120-140 °C, stir and disperse for 60-80 min. After the material is cooled to room temperature, add binder, surfactant, fluorosilane, and catalyst, stir and disperse for 10-15 min, and then start vacuum defoaming to obtain component A; 2) Preparation of component B: Vinyl polysiloxane, white carbon black and hydrogenated silicone oil are put into a disperser, heated to 120-140°C, stirred and dispersed for 60-80 minutes, and after the materials are cooled to room temperature, an inhibitor is added, stirred and dispersed for 10-15 minutes, and then vacuum degassing is started to obtain component B; 3) The prepared component A and component B are mixed evenly to obtain a silicone spray adhesive.

[0024] By adopting the above technical solution, the uniform distribution of each component is ensured, and the uniformity and adhesion of the silicone spray adhesive are improved.

[0025] In summary, this application has the following beneficial effects: 1. This silicone spray adhesive achieves excellent comprehensive performance through the carefully designed two-component formula of A and B. Component A is based on vinyl silicone oil, which gives the coating flexibility and buffering ability. White carbon black is used as a reinforcing agent to improve mechanical strength and wear resistance. The two work together to ensure that the coating has both flexibility and sufficient strength. The addition of fluorinated silane and surfactant gives the coating low surface energy, making it hydrophobic and easy to clean, reducing stain adhesion and facilitating cleaning. The binder significantly improves the bonding strength between the coating and the surface of the cup, effectively preventing glass fragments from splashing. The antibacterial agent provides antibacterial properties to prevent bacterial growth; the thermal insulation filler enhances the thermal insulation effect to prevent users from being scalded. The hydrogen-containing silicone oil in component B and the vinyl silicone oil in component A undergo a cross-linking reaction under the action of a platinum catalyst to form a solid protective layer. Overall, the coating formed by the spray adhesive has a smooth surface and is easy to clean, avoiding the problems of traditional silicone cup covers that are easy to hide dirt, difficult to clean, easy to breed bacteria, and splashing fragments when glass is broken, providing all-round protection for the cup. DETAILED DESCRIPTION Example

[0026] Silver ion antibacterial agent was purchased from Hebei Hengyue Mineral Products Co., Ltd. with a mesh size of 125,000 and a density of 0.92 g / ml.

[0027] Bisphenol A epoxy resin was purchased from Meizhou Fuxi Chemical Co., Ltd., and polyoxyethylene hexadecyl ether with specification 240 was purchased from Shanghai Maokang Biotechnology Co., Ltd., model number MS4356-100G.

[0028] Polyethylene glycol siloxane is polydimethylsiloxane-polyethylene glycol, purchased from Xi'an Qiyue Biotechnology Co., Ltd., model PDMS-PEO.

[0029] The platinum catalyst was purchased from Wuhan Lanabai Pharmaceutical Chemical Co., Ltd. with a CAS number of 68478-92-2.

[0030] Example 1 A silicone spraying adhesive is prepared by the following method: 1) Prepare component A: Put 1000 g of vinyl polysiloxane, 200 g of fumed silica, 100 g of heat-insulating filler (titanium dioxide), 20 g of silane coupling agent (γ-aminopropyltriethoxysilane), and 20 g of antibacterial agent (silver ion antibacterial agent) into a disperser, heat up to 120 °C, stir and disperse for 60 min. After the material cools to room temperature, add 50 g of binder (bisphenol A epoxy resin), 30 g of surfactant (polyoxyethylene cetyl ether), 40 g of fluorosilane (tridecafluorooctyltriethoxysilane), and 1 g of platinum catalyst, stir and disperse for 10 min, and then start vacuum deaeration to obtain component A; 2) Prepare component B: Put 1000 g of vinyl polysiloxane, 200 g of fumed silica, and 50 g of hydrogen-containing silicone oil into a disperser, heat up to 120 °C, stir and disperse for 60 min. After the material cools to room temperature, add 0.5 g of inhibitor (methylbutynol), stir and disperse for 10 min, and then start vacuum deaeration to obtain component B; 3) Mix the prepared component A and component B evenly according to a weight ratio of 1:1 to obtain the silicone spraying adhesive.

[0031] The vinyl content of the vinyl silicone oil is 0.4%, and the viscosity is 1000 mPa·s.

[0032] The hydrogen content of the hydrogen-containing silicone oil is 0.1%, and the viscosity is 100 mPa·s.

[0033] The differences between Example 2-3 and Example 1 are that the types, dosages, and parameters of the raw materials for preparing the silicone spraying adhesive are different. The specific differences are shown in Table 1: Table 1 Types, dosages, and parameters of raw materials for preparing silicone spraying adhesive in Examples 1-3 Example 4 A silicone spraying adhesive. The difference between this example and Example 1 is that the binder is prepared by the following method: A: Mix 400 g of epoxy resin (bisphenol A epoxy resin), 50 g of polyfunctional acrylate monomer (trimethylolpropane triacrylate), and 2 g of catalyst (triethylamine), then heat up to 80 °C, keep warm and stir for 30 min, add 80 g of acrylate oligomer and 5 g of initiator (potassium persulfate), heat up to 100 °C, and react for 2 h to obtain a reaction product; B: Stir the reaction product and 300 g of diluent (butyl glycidyl ether) evenly to obtain the binder.

[0034] The acrylate oligomer was purchased from Wuhan Kemic Biopharmaceutical Technology Co., Ltd., with the product number KM609.

[0035] Example 5 A silicone spraying adhesive. The difference between this example and Example 1 is that the binder is prepared by the following method: A: Mix 500 g of epoxy resin (bisphenol A type epoxy resin), 100 g of polyfunctional acrylate monomer (pentaerythritol triacrylate), and 4 g of catalyst (triphenylphosphine), then heat up to 90 °C, keep stirring for 60 min, add 100 g of acrylate oligomer and 8 g of initiator (ammonium persulfate), heat up to 110 °C, and react for 3 h to obtain a reaction product; B: Stir the reaction product and 400 g of diluent (ethylene glycol diglycidyl ether) evenly to obtain the binder.

[0036] Example 6 A silicone spraying adhesive. The difference between this example and Example 1 is that the surfactant is composed of polyoxyethylene cetyl ether and polyethylene glycol siloxane in a weight ratio of 2:3.

[0037] Example 7 A silicone spraying adhesive. The difference between this example and Example 4 is that the surfactant is composed of polyoxyethylene cetyl ether and polyethylene glycol siloxane in a weight ratio of 2:5.

[0038] Example 8 A silicone spraying adhesive. The difference between this example and Example 6 is that the surfactant is polyethylene glycol siloxane.

[0039] Example 9 A silicone spraying adhesive. The difference between this example and Example 1 is that the binder is polyurethane resin.

[0040] The polyurethane resin was purchased from Hubei Chuangxin Polyurethane Materials Co., Ltd., with the model CX-613.

[0041] Example 10 A silicone spraying adhesive. The difference between this example and Example 1 is that the vinyl content of the vinyl silicone oil is 0.2%, and the viscosity is 1000 mPa·s.

[0042] Comparative Example Comparative Example 1 A silicone spraying adhesive. The difference between this example and Example 1 is that nano calcium carbonate is used instead of the binder.

[0043] Comparative Example 2 A silicone spraying adhesive. The difference between this example and Example 1 is that polyoxyethylene lauryl ether is used instead of fluorosilane.

[0044] Testing method / Test method for peel strength: Scrape and coat the silicone spray adhesive on a glass plate with a width of 20 mm and a length of not less than 100 mm, and the thickness of the adhesive layer is 1 ± 0.01 mm. After curing, let it stand for 24 h, and then use a universal tensile machine for testing with a peeling speed of 30 mm / min. Similarly, scrape and coat the silicone spray adhesive on an iron plate for the same test.

[0045] Glass splash test: Scrape and coat the silicone spray adhesive on a glass plate with a width of 100 mm and a length of 100 mm, and the thickness of the adhesive layer is 1 ± 0.01 mm. After curing, place it in an environment with a temperature of 150 °C and let it stand for 500 h. Take it out, cool it, and then let it fall naturally from a height of 3 m above the horizontal ground to observe whether there is any glass shedding.

[0046] Cleaning test: Mix coffee, red wine, and chili sauce in a weight ratio of 1:1:1 to prepare a contamination liquid. Scrape and coat the silicone spray adhesive on a glass plate with a width of 100 mm and a length of 100 mm, and the thickness of the adhesive layer is 1 ± 0.01 mm. After curing, drop the contamination liquid on the surface of the cured silicone spray adhesive, let it stand for 10 min, and then wipe it with a wet cloth. Count the number of times it can be wiped clean. If it exceeds 30 times, it is considered not clean enough.

[0047] Heat insulation test: Spray the silicone spray adhesive on the surface of a glass cup. After curing, let it stand for 24 h. Then add 100 °C hot water to the glass cup, let it stand for 10 min, and use a thermocouple temperature sensor to measure the temperature inside and outside the glass cup and calculate the temperature difference. The larger the temperature difference, the better the heat insulation performance. The experimental data are shown in Table 2: Table 2 Experimental data of Examples 1-10 and Comparative Examples 1-2 Comparing Example 1 with Comparative Example 1, the peel strength in Comparative Example 1 is lower than that in Example 1; in the glass splash test, splashing occurred in Comparative Example 1; the temperature difference in Comparative Example 1 in the heat preservation test is much smaller than that in Example 1, indicating that by adding a binder, it is beneficial to improve the bonding performance and heat insulation performance of the silicone spray adhesive, and at the same time can effectively prevent glass fragments from splashing when the glass breaks.

[0048] Comparing Example 1 with Comparative Example 2, the peel strength in Comparative Example 1 is slightly lower than that in Example 1; in the cleaning test, Comparative Example 2 showed a situation where it could not be wiped clean, indicating that by adding an appropriate amount of fluorosilane in this application, it is beneficial to improve the bonding performance of the silicone spray adhesive and at the same time can improve its cleaning performance.

[0049] Comparing Example 1 with Examples 4 - 5, the peel strengths of Examples 4 - 5 are higher than that of Example 1; the temperature difference in the heat preservation test of Examples 4 - 5 is higher than that of Example 1, indicating that the binder prepared by this application is beneficial to improving the bonding performance and heat insulation performance of the silicone spraying adhesive.

[0050] Comparing Example 1 with Example 6, the peel strengths of Example 6 are higher than that of Example 1; in the cleaning test, the number of cleaning times of Example 6 is less than that of Example 1; Comparing Example 4 with Example 7, the peel strengths of Example 7 are higher than that of Example 4; in the cleaning test, the number of cleaning times of Example 7 is less than that of Example 4; Comparing Example 6 with Example 8, the peel strengths of Example 6 are higher than that of Example 8; in the cleaning test, the number of cleaning times of Example 6 is less than that of Example 8; From the experimental data of Examples 1 and 6, Examples 4 and 7, and Examples 6 and 8, it can be seen that by using cetyl polyoxyethylene ether and polyethylene glycol siloxane in combination, it is beneficial to improve the bonding performance and cleaning performance of the silicone spraying adhesive.

[0051] Comparing Example 1 with Example 9, the peel strengths of Example 1 are higher than that of Example 9; in the cleaning test, the number of cleaning times of Example 1 is less than that of Example 9, indicating that by using bisphenol A epoxy resin as the binder, it is beneficial to improve the bonding performance and cleaning performance of the silicone spraying adhesive.

[0052] Comparing Example 1 with Example 10, the peel strengths of Example 1 are higher than that of Example 10; in the cleaning test, the number of cleaning times of Example 1 is less than that of Example 9, indicating that by optimizing the parameters of vinyl silicone oil, it is beneficial to improve the bonding performance and cleaning performance of the silicone spraying adhesive.

[0053] This specific embodiment is only an explanation of this application and does not limit this application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A silicone spray coating, characterized in that: The silicone spray adhesive comprises component A and component B, wherein component A is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone oil 20-30 parts of white carbon black Silane coupling agent 2-3 parts Platinum catalyst 0.1-0.5 parts 10-15 parts of thermal insulation filler 2-4 parts of antibacterial agent 4-6 parts of fluorinated silane 5-10 parts of adhesive 3-5 parts surfactant Component B is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone oil 20-30 parts of white carbon black 5-10 parts of hydrogen silicone oil Inhibitor 0.05-0.1 parts.

2. The silicone spray adhesive according to claim 1, characterized in that: The binder is prepared by the following method: A: Mix epoxy resin with multifunctional acrylate monomer and catalyst, then heat to 80-90°C, keep warm and stir for 30-60 minutes, add acrylate oligomer and initiator, heat to 100-110°C, react for 2-3 hours to obtain reactants; B: Mix the reactants and diluent evenly to obtain a binder.

3. The silicone spray adhesive according to claim 2, characterized in that: The weight parts of raw materials used to prepare the binder are as follows: Epoxy resin 40-50 parts 5-10 parts of multifunctional acrylate monomer Catalyst 0.2-0.4 parts Acrylate oligomer 8-10 parts Initiator 0.5-0.8 parts 30-40 parts of diluent.

4. The silicone spray adhesive according to claim 3, characterized in that: The multifunctional acrylate monomer includes at least one of trimethylolpropane triacrylate, pentaerythritol triacrylate, tripropylene glycol diacrylate, 1,6-hexanediol diacrylate, bisphenol A diacrylate and ethoxybisphenol fluorene diacrylate.

5. The silicone spray adhesive according to claim 3, characterized in that: The epoxy resin is at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol E epoxy resin and polyphenol epoxy resin.

6. The silicone spray adhesive according to claim 1, characterized in that: The surfactant is composed of polyoxyethylene cetyl ether and polyethylene glycol siloxane in a weight ratio of 2: (3-5).

7. The silicone spray adhesive according to claim 1, characterized in that: The fluorine-containing silane includes at least one of tridecafluorooctyl triethoxysilane, perfluorooctyl triethoxysilane, heptadecafluorodecyl triethoxysilane, trifluoropropyl trimethoxysilane and perfluorodecyl trimethoxysilane.

8. The silicone spray adhesive according to claim 1, characterized in that: The vinyl content of the vinyl silicone oil is 0.4-1.2%, and the viscosity is 1000-10000 mPa.s.

9. The silicone spray adhesive according to claim 1, characterized in that: The hydrogen content of the hydrogen-containing silicone oil is 0.1-0.5%, and the viscosity is 100-1000mPa.s.

10. A method for preparing the silicone spray adhesive according to any one of claims 1 to 9, characterized in that: The following steps are involved: 1) Preparation of component A: Add vinyl polysiloxane, white carbon black, thermal insulation filler, silane coupling agent, antibacterial agent into a disperser, heat to 120-140°C, stir and disperse for 60-80 minutes, wait for the material to cool to room temperature, add binder, surfactant, fluorinated silane and catalyst, stir and disperse for 10-15 minutes, then start vacuum degassing to obtain component A; 2) Preparation of component B: Add vinyl polysiloxane, white carbon black and hydrogenated silicone oil into a disperser, heat to 120-140°C, stir and disperse for 60-80 minutes, wait for the materials to cool to room temperature, add inhibitor, stir and disperse for 10-15 minutes, and then start vacuum degassing to obtain component B; 3) Evenly mix the prepared component A and component B to obtain a silicone spray adhesive.

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