High-temperature-resistant acrylic foam tape and preparation method thereof

Abstract

The invention relates to the field of acrylic foam materials, and discloses a high-temperature-resistant acrylic foam adhesive tape and a preparation method thereof. The invention relates to a high-temperature-resistant acrylic foam adhesive tape, which consists of a first release film, an acrylic foam adhesive layer and a second release film from top to bottom, the acrylic foam adhesive is prepared from the following raw materials in parts by weight: 100 to 120 parts of 2-ethylhexyl acrylate-acrylic acid copolymer, 0.1 to 0.3 part of cross-linking aid, 4 to 8 parts of hollow glass beads, 3 to 5 parts of high-temperature-resistant resin, 0.2 to 0.8 part of photoinitiator, 0.05 to 0.1 part of foaming agent and 0.05 to 0.1 part of pigment. The high-temperature-resistant acrylic foam adhesive tape prepared by the invention is applied to automotive interior fitting, has relatively good bonding stability, and is not easy to soften, displace and fall off in long-term sun exposure and high-temperature environments.

Description

Technical Field

[0001] The present application relates to the field of acrylic foam materials, and more specifically, to a high-temperature resistant acrylic foam tape and a preparation method thereof. Background Art

[0002] Acrylic foam tape is widely used in automotive exterior applications and offers numerous advantages. Its excellent flexibility and elasticity allow it to adapt effectively to the shape and surface contours of automotive exterior parts, achieving a tight fit and ensuring a stable bond. Furthermore, this tape offers excellent weather resistance, offering a degree of resistance to UV rays, ozone, and varying climatic conditions. This ensures that over the long-term use of the vehicle, the bonded areas will not rapidly age or fail due to environmental factors, thereby maintaining the integrity and aesthetics of the vehicle's exterior.

[0003] Existing acrylic foam tapes are primarily made from the polymerization of acrylic hard monomers, acrylic soft monomers, and acrylic functional monomers, with additives such as fillers added to improve performance. Their advantages include excellent initial tack and sustained adhesion, allowing them to quickly adhere to automotive exterior trim and related components at room temperature while exhibiting strong bonding strength. This facilitates installation without the need for additional reinforcement.

[0004] However, existing acrylic foam tapes have significant drawbacks. Their performance degrades significantly in extreme heat. When a car is exposed to the sun, the temperature continues to rise, causing the adhesive to soften and subsequently experience creep. This creep can cause exterior trim parts to lose their stable position, shift, and even fall off in severe cases. This negatively impacts the appearance and proper use of the interior, increases maintenance costs, and poses a potential safety hazard. Summary of the Invention

[0005] In order to solve the problem that the existing acrylic foam tape is prone to unstable adhesion and falling off under sun exposure and high temperature conditions, the present application provides a high-temperature resistant acrylic foam tape and a preparation method thereof.

[0006] In the first aspect, the present application provides a high temperature resistant acrylic foam tape, which adopts the following technical solution: A high-temperature resistant acrylic foam tape, which consists of a first release film, an acrylic foam adhesive layer, and a second release film from top to bottom. The acrylic foam adhesive layer is made by reacting acrylic foam adhesive, which is made from the following raw materials in parts by weight: 100-120 parts of isooctyl acrylate-acrylic acid copolymer Cross-linking aid 0.1-0.3 parts 4-8 parts hollow glass microspheres 3-5 parts of high temperature resistant resin Photoinitiator 0.2-0.8 parts Foaming agent 0.05-0.1 parts Pigment 0.05-0.1 parts.

[0007] By adopting the above technical solution, the high-temperature resistant acrylic foam tape of the present application is a double-sided acrylic foam adhesive bonding structure, and the first release film and the second release film play the role of protecting and supporting the acrylic foam adhesive layer, which is convenient for storage and use. The acrylic foam adhesive uses isooctyl acrylate-acrylic acid copolymer as a matrix, and the copolymer structure of isooctyl acrylate segments and acrylic acid segments gives the acrylic foam adhesive excellent flexibility and hardness; the cross-linking auxiliary agent can further polymerize with the isooctyl acrylate-acrylic acid copolymer under the initiation action of the photoinitiator, promote the formation of a cross-linked structure between polymer molecules, thereby enhancing the cohesive strength and stability of the acrylic foam adhesive layer, and further improving the bonding performance of the tape. Hollow glass microbeads are a type of microparticle with a tiny pore structure and have the advantage of a large specific surface area. In the acrylic foam adhesive, they can reduce the density of the system, improve the fluidity and cohesion of the acrylic foam adhesive, and thus improve the bonding strength of the acrylic foam adhesive. The high-temperature-resistant resin can further synergize with the isooctyl acrylate-acrylic acid copolymer and crosslinking agent to enhance the stability of the acrylic foam adhesive in high-temperature environments, making the colloid less susceptible to softening at high temperatures and providing good cohesion and stability. The blowing agent can form a uniform, stable, and closed foam pore structure in the acrylic foam adhesive layer, resulting in a uniform foam pore structure with good cushioning, flexibility, and conformability. The colorant plays a role in giving the acrylic foam adhesive the desired appearance and color.

[0008] The high-temperature resistant acrylic foam tape prepared in this application is suitable for the field of automotive interior bonding. It is not easy to soften, displace or fall off under long-term sun exposure and high-temperature environment, and has good bonding stability. It effectively solves the problem of performance degradation of existing acrylic foam tapes at high temperatures, reducing maintenance costs and safety hazards.

[0009] Preferably, the isooctyl acrylate-acrylic acid copolymer is prepared from the following raw materials in percentage by weight: 85-95 parts of 2-ethylhexyl acrylate 9-15 parts of acrylic acid 3-5 parts of triethylene glycol divinyl ether 2-4 parts triisopropylsilyl methacrylate Chain transfer agent 0.01-0.02 parts Photoinitiator 0.05-0.2 parts.

[0010] By adopting the above technical solution, isooctyl acrylate provides good viscosity and flexibility to the isooctyl acrylate-acrylic acid copolymer, while acrylic acid can increase the polarity and hardness of the isooctyl acrylate-acrylic acid copolymer. The two react in an optimal ratio under the action of a photoinitiator and a chain transfer agent, which can optimize the molecular weight of the copolymer, increase the hardness and flexibility of the resulting isooctyl acrylate-acrylic acid copolymer, and thus improve the bonding stability of the acrylic foam adhesive under high temperature conditions. Triethylene glycol divinyl ether can further form a three-dimensional network structure. The soft long-chain ether segments it contains can synergistically interweave with triisopropylsilyl methacrylate, further improving the molecular structure stability and flexibility of the resulting isooctyl acrylate-acrylic acid copolymer and imparting excellent heat resistance and stability to the acrylic foam adhesive layer. The synergistic effect of these components imparts excellent flexibility, viscosity, heat resistance, and cohesion to the acrylic foam tape.

[0011] Preferably, the isooctyl acrylate-acrylate copolymer is prepared by the following steps: Isooctyl acrylate, acrylic acid, triethylene glycol divinyl ether, triisopropylsilyl methacrylate, a chain transfer agent and a photoinitiator are added into a reaction device, and light reaction is carried out under a nitrogen atmosphere to prepare an isooctyl acrylate-acrylate copolymer.

[0012] By adopting the above technical solution, the isooctyl acrylate-acrylate copolymer is prepared by light irradiation reaction under a nitrogen atmosphere, which can avoid the interference of oxygen on the reaction, ensure the smooth progress of the reaction, and make all raw materials fully react, which helps to improve the quality and performance of the isooctyl acrylate-acrylate copolymer.

[0013] Preferably, the light wavelength is 320-400 nm and the light intensity is 100-200 mj / cm 2 , control the reaction to rise 16-20°C from room temperature and then stop the reaction.

[0014] By adopting the above technical solution, the wavelength of light is controlled at 320-400nm and the intensity of light is controlled at 100-200mj / cm 2 , and controlling the reaction to stop after the temperature rises 16-20°C from room temperature, can avoid excessive cross-linking of isooctyl acrylate-acrylate copolymer due to excessive light and high temperature, and can also prevent insufficient light and low temperature from causing insufficient reaction, thereby avoiding the problem of reduced bonding strength of the acrylic foam tape produced, which helps to improve the comprehensive performance of the final high-temperature resistant acrylic foam tape.

[0015] Preferably, the crosslinking auxiliary agent is composed of a crosslinker and cyclohexyl vinyl ether in a weight ratio of (4-5):1, and the crosslinker is any one or a combination of 1,6-hexanediol diacrylate, dicyclopentadiene acrylate, and trimethylolpropane triacrylate.

[0016] By employing the above technical solution, with an optimal weight ratio of crosslinker and cyclohexyl vinyl ether as a crosslinking aid, 1,6-hexanediol diacrylate, dicyclopentadiene acrylate, and trimethylolpropane triacrylate all possess two or more reactive functional groups, which can further form a crosslinking structure with the isooctyl acrylate-acrylic acid copolymer, enhancing the cohesion and strength of the acrylic foam adhesive layer and the adhesive stability of the tape. The cyclohexyl group in the cyclohexyl vinyl ether molecular structure imparts good hardness to the acrylic foam adhesive, while the ether group imparts good flexibility. This balance of rigidity and flexibility ensures the acrylic foam adhesive possesses both hardness and toughness, while also modulating the crosslinking reaction. The cyclohexyl group provides steric hindrance, optimizing the crosslinking network structure and preventing over-crosslinking. The synergistic effect of these two groups ensures a more uniform and stable crosslinking reaction, further improving the performance of the acrylic foam tape in high-temperature environments, making it less susceptible to softening, displacement, and shedding under prolonged sun exposure and high-temperature conditions.

[0017] Preferably, the high temperature resistant resin is terpene phenol resin and / or terpene resin.

[0018] By adopting the above technical solution, terpene phenol resin and / or terpene resin are added to the acrylic foam adhesive as a high-temperature resistant resin, which can effectively improve the high-temperature resistance of the acrylic foam tape, making it less likely to soften under long-term sun exposure and high-temperature environment, avoiding creep phenomenon, preventing the displacement and falling off of automobile exterior parts, and ensuring the bonding stability of the tape in automobile interior bonding.

[0019] Preferably, the photoinitiator is 1-hydroxycyclohexyl phenyl ketone and / or 2-hydroxy-2-methyl-1-phenyl-1-propanone.

[0020] By adopting the above technical solution and selecting 1-hydroxycyclohexyl phenyl ketone and / or 2-hydroxy-2-methyl-1-phenyl-1-propanone as photoinitiators, the raw materials in the acrylic foam adhesive system can be promoted to undergo polymerization reaction under light conditions, thereby facilitating the molding of high-temperature resistant acrylic foam tape and ensuring that it can maintain a stable structure and performance even in a high-temperature environment, thereby improving the tape's resistance to softening, displacement, and shedding under long-term sun exposure and high-temperature environments.

[0021] Preferably, the thickness of the acrylic foam adhesive layer is 600-800 μm.

[0022] By adopting this technical solution, the thickness of the acrylic foam adhesive layer is set to 600-800μm, ensuring that the tape has both good flexibility and elasticity to fit tightly to automotive interior parts. If the thickness is too thin, the adhesive stability of the tape may be insufficient, unable to withstand the force required for automotive interior bonding, and it may be more susceptible to high-temperature environments, reducing its heat resistance. If the thickness is too thick, it will not only increase production costs, but may also reduce the tape's flexibility, making it difficult to adapt to the shape and surface contours of automotive interior parts, affecting the bonding effect.

[0023] In a second aspect, the present application provides a method for preparing a high-temperature resistant acrylic foam tape, which adopts the following technical solution: A method for preparing a high-temperature resistant acrylic foam tape comprises the following steps: S1. Preparation of acrylic foam adhesive: mixing isooctyl acrylate-acrylic acid copolymer, a cross-linking aid, hollow glass microspheres, a high temperature resistant resin, a photoinitiator and a colorant to prepare a mixture; S2. Coating the mixture on the surface of the first release film, then covering it with the second release film, and reacting it with light to obtain a high-temperature resistant acrylic foam tape.

[0024] By adopting the above technical solution, in step S1, isooctyl acrylate-acrylic acid copolymer, a crosslinking aid, hollow glass microspheres, a high-temperature resistant resin, a photoinitiator, a foaming agent, and a colorant are mixed and stirred to produce a mixture. The synergistic effect of these ingredients imparts excellent properties to the acrylic foam adhesive. In step S2, the mixture is coated on the surface of a first release film, followed by a second release film and subjected to light reaction to produce a high-temperature resistant acrylic foam tape. This process allows the ingredients to fully react to form a stable structure, resulting in the resulting high-temperature resistant acrylic foam tape having good adhesive stability and being resistant to softening, displacement, and shedding under long-term exposure to sunlight and high temperatures.

[0025] Preferably, the illumination intensity in step S2 is 3000-3500 mj / cm 2 , the lighting time is 10-16min.

[0026] By adopting the above technical solution and carrying out light reaction under specific light intensity and time, the raw materials in the high-temperature resistant acrylic foam tape can be fully reacted, ensuring the stability of the tape structure. As a result, the acrylic foam tape is not easy to soften, displace or fall off under long-term sun exposure and high temperature environment, and has good bonding stability.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The high-temperature resistant acrylic foam tape of the present application is composed of a first release film, an acrylic foam adhesive layer and a second release film. The acrylic foam adhesive layer is prepared by the reaction of acrylic foam adhesive, wherein the raw materials of the acrylic foam adhesive include isooctyl acrylate-acrylic acid copolymer, a cross-linking aid, hollow glass microspheres, a high-temperature resistant resin, a photoinitiator, a foaming agent and a pigment. These components work synergistically to enable the prepared acrylic foam tape to have good flexibility and bonding stability in automotive interior lamination, can adapt to the shape and surface contour of automotive interior parts, and is not prone to displacement and falling off under long-term sun exposure and high temperature environments.

[0028] 2. Isooctyl acrylate-acrylic acid copolymer is made from isooctyl acrylate, acrylic acid, triethylene glycol divinyl ether, triisopropylsilyl methacrylate, chain transfer agent and photoinitiator, which helps to improve the high-temperature resistant bonding strength and stability of the tape.

[0029] 3. The cross-linking aid is composed of a cross-linking agent and cyclohexyl vinyl ether in an optimal weight ratio. The cross-linking agent is selected from 1,6-hexanediol diacrylate, dicyclopentadiene acrylate, and trimethylolpropane triacrylate. The two work together to further optimize the degree of cross-linking reaction, thereby enhancing the high temperature resistance and bonding stability of acrylic foam tape in automotive interior lamination. DETAILED DESCRIPTION

[0030] The present application is further described in detail below with reference to the embodiments.

[0031] The following are the sources and specifications of some raw materials of this application. The raw materials used in the preparation examples and examples of this application can be obtained from commercial sources, including but not limited to the following models and manufacturers. Raw materials with equivalent performance can be used: 1. Hollow glass microspheres: silicate glass microspheres, D50 is 70um; 2. Foaming agent: Expancel 031DU40 Aksu, acrylic foam microspheres; 3. Terpene phenol resin: Runhe 803L, TG point 75℃, softening point 149℃; 4. First release film and second release film: PET release film, thickness 75μm, release force 10g / in.

[0032] Preparation Example of Isooctyl Acrylate-Acrylic Acid Copolymer Preparation Example 1 Preparation Example 1 discloses an isooctyl acrylate-acrylic acid copolymer, which is prepared by the following steps: 8.5 kg of isooctyl acrylate, 0.9 kg of acrylic acid, 0.5 kg of triethylene glycol divinyl ether, 0.2 kg of triisopropylsilyl methacrylate, 0.001 kg of chain transfer agent, and 0.005 kg of photoinitiator are added to a reactor, and the reaction is carried out under a 99.99% nitrogen atmosphere with light irradiation at a wavelength of 320 nm and a light intensity of 200 mJ / cm 2 The reaction was stopped after the temperature was raised by 20°C at 23°C to obtain isooctyl acrylate-acrylate copolymer.

[0033] Preparation Example 2-3 The difference between Preparation Example 2-3 and Preparation Example 1 is that the amount of raw materials used and the preparation conditions are different. Please refer to Table 1 below for details.

[0034] Table 1 Parameters of Preparation Examples 1-3 Preparation Example 4 The difference between Preparation Example 4 and Preparation Example 1 is that an equal amount of triethylene glycol divinyl ether is replaced by triisopropylsilyl methacrylate, and the rest is the same as Preparation Example 1.

[0035] Preparation Example 5 The difference between Preparation Example 5 and Preparation Example 1 is that an equal amount of triisopropylsilyl methacrylate is replaced by hydroxyethyl acrylate, and the rest is the same as Preparation Example 1.

[0036] Preparation Example 6 Preparation Example 6 differs from Preparation Example 1 in that triethylene glycol divinyl ether and triisopropylsilyl methacrylate are not added, and the other steps are the same as Preparation Example 1. Example

[0037] Example 1 Example 1 discloses a high-temperature resistant acrylic foam tape, which is composed of a first release film, an acrylic foam adhesive layer and a second release film from bottom to top. The first release film and the second release film are both PET films. The acrylic foam adhesive layer is prepared by reacting acrylic foam adhesive. The thickness of the acrylic foam adhesive layer is 600-800 μm. The thickness of the acrylic foam adhesive layer prepared in this embodiment is 800 μm.

[0038] The high temperature resistant acrylic foam tape is prepared by the following steps: S1. Preparation of acrylic foam adhesive: 10 kg of the isooctyl acrylate-acrylic acid copolymer prepared in Preparation Example 1, 0.02 kg of 1,6-hexanediol diacrylate as a crosslinking aid, 0.4 kg of hollow glass microspheres, 0.4 kg of terpene phenol resin as a high-temperature resistant resin, 0.02 kg of 1-hydroxycyclohexyl phenyl ketone as a photoinitiator, 0.005 kg of a foaming agent, and 0.005 kg of carbon black as a colorant were mixed at 25° C. for 6 h until uniformly mixed to obtain a mixture; S2: Coat the mixture on the surface of the first release film, then cover it with the second release film, and perform light irradiation reaction. The light wavelength is controlled to be 365nm and the light intensity is 3000mj / cm 2 , the illumination time is 16 minutes, and high temperature resistant acrylic foam tape is prepared.

[0039] Example 2-3 The difference between Example 2-3 and Example 1 is that the raw materials for preparing the acrylic foam adhesive are different, and the steps of the preparation method are also different. Please refer to Table 2 below for details.

[0040] Table 2 Parameters of Examples 2-3 Examples 4-6 The difference between Examples 4-6 and Example 1 is that the sources of the isooctyl acrylate-acrylic acid copolymer are different. For details, see Table 3 below.

[0041] Table 3 Parameters of Examples 4-6 Example Source of 2-ethylhexyl acrylate-acrylic acid copolymer Example 4 Preparation Example 4 Example 5 Preparation Example 5 Example 6 Preparation Example 6 Example 7 The difference between Example 7 and Example 1 is that the crosslinking auxiliary agent consists of 1,6-hexanediol diacrylate and cyclohexyl vinyl ether in a weight ratio of 4:1, and the rest is the same as Example 1.

[0042] Example 8 The difference between Example 8 and Example 1 is that the crosslinking auxiliary agent consists of 1,6-hexanediol diacrylate and cyclohexyl vinyl ether in a weight ratio of 5:1, and the rest is the same as Example 1.

[0043] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that an equal amount of the high-temperature resistant resin is replaced by isooctyl acrylate-acrylic acid copolymer, and the rest is the same as Example 1.

[0044] Performance testing The following performance tests were conducted on the high-temperature resistant acrylic foam tapes prepared in Examples 1-8 and Comparative Example 1: 1. Peel force test: Room temperature peel strength: Refer to ASTM D3330 Method C: Test method for adhesion between double-sided tape and standard steel plate, and perform peel strength test (unit: N / 25mm) at 25°C. Test and record the test results. 80°C peel strength: Refer to ASTM D3330 Method C: Test method for adhesion between double-sided tape and standard steel plate, and perform peel strength test (unit: N / 25mm) at 80°C. Test and record the test results. PP plate peel strength: Refer to ASTM D3330 Method C: Test method for adhesion between double-sided tape and standard steel plate, using PP plate instead of standard steel plate as the test plate. Perform peel strength test (unit: N / 25mm) at 25°C and record the test results.

[0045] 2. Holding force displacement test: Refer to the test method in Method A of ASTM D3654 to test the holding force displacement (unit: mm) under the conditions of 80°C and 10,000 minutes, and test and record the test results.

[0046] 3. Shear strength test: Dynamic shear strength at room temperature: Refer to the test method in ASTM D1002 and perform dynamic shear strength (unit: KPa) test at 25°C. Test and record the test results. 80℃ Static Shear Strength: Refer to the test method in ASTM D1002 and perform a static shear strength test (unit: KPa) at 80℃. Test and record the test results.

[0047] The following are the performance test data of the high temperature resistant foam tapes of Examples 1-8 and Comparative Example 1, see Table 4 below for details.

[0048] Table 4 Performance data of Examples 1-8 and Comparative Example 1 In combination with Examples 1-3 and Examples 4-6 and Table 4, it is concluded that the preparation of the isooctyl acrylate-acrylic acid copolymer is changed in Examples 4-6, and the peel force and shear force of the obtained high-temperature resistant acrylic foam tape at room temperature and at a high temperature of 80°C are reduced, and the peel force of the PP board test is also reduced, and the displacement in the holding force displacement test is significantly increased, indicating that the use of the isooctyl acrylate, acrylic acid, triethylene glycol divinyl ether, triisopropylsilyl methacrylate, chain transfer agent and photoinitiator of the present application to prepare the isooctyl acrylate-acrylic acid copolymer, which is applied to the high-temperature resistant acrylic foam tape, can significantly improve the high-temperature bonding stability of the acrylic foam tape.

[0049] Compared with the examples, the types of cross-linking agents in Examples 7-8 are further optimized, and the peel force and shear strength of the obtained high-temperature resistant acrylic foam tapes at room temperature and high temperature conditions are improved, and the holding force displacement is also reduced.

[0050] Compared with Example 1, in Comparative Example 1, no high-temperature resistant resin is added to the formula. The peel force and shear strength of the obtained high-temperature resistant acrylic foam tape are reduced under normal temperature and high temperature conditions, and the holding force displacement is increased.

[0051] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A high temperature resistant acrylic foam tape, characterized in that: From top to bottom, it is composed of a first release film, an acrylic foam adhesive layer, and a second release film. The acrylic foam adhesive layer is made by reacting acrylic foam adhesive, and the acrylic foam adhesive is made from the following raw materials in parts by weight: 100-120 parts of 2-ethylhexyl acrylate-acrylic acid copolymer Cross-linking aid 0.1-0.3 parts 4-8 parts hollow glass microspheres 3-5 parts of high temperature resistant resin Photoinitiator 0.2-0.8 parts Foaming agent 0.05-0.1 parts Pigment 0.05-0.1 parts.

2. The high temperature resistant acrylic foam tape according to claim 1, characterized in that: The isooctyl acrylate-acrylic acid copolymer is prepared from the following raw materials in percentage by weight: 85-95 parts of 2-ethylhexyl acrylate 9-15 parts of acrylic acid 3-5 parts of triethylene glycol divinyl ether 2-4 parts triisopropylsilyl methacrylate Chain transfer agent 0.01-0.02 parts Photoinitiator 0.05-0.2 parts.

3. The high temperature resistant acrylic foam tape according to claim 2, characterized in that: The isooctyl acrylate-acrylate copolymer is prepared by the following steps: Isooctyl acrylate, acrylic acid, triethylene glycol divinyl ether, triisopropylsilyl methacrylate, a chain transfer agent and a photoinitiator are added into a reaction device, and light reaction is carried out under a nitrogen atmosphere to prepare an isooctyl acrylate-acrylate copolymer.

4. The high temperature resistant acrylic foam tape according to claim 3, characterized in that: The light wavelength is 320-400nm and the light intensity is 100-200mj / cm 2 , control the reaction to rise 16-20°C from room temperature and then stop the reaction.

5. The high temperature resistant acrylic foam tape according to claim 1, characterized in that: The cross-linking auxiliary agent is composed of a cross-linking agent and cyclohexyl vinyl ether in a weight ratio of (4-5):1, and the cross-linking agent is any one or a combination of 1,6-hexanediol diacrylate, dicyclopentadiene acrylate, and trimethylolpropane triacrylate.

6. The high temperature resistant acrylic foam tape according to claim 1, characterized in that: The high temperature resistant resin is terpene phenol resin and / or terpene resin.

7. The high temperature resistant acrylic foam tape according to claim 1, characterized in that: The photoinitiator is 1-hydroxycyclohexyl phenyl ketone and / or 2-hydroxy-2-methyl-1-phenyl-1-propanone.

8. The high temperature resistant acrylic foam tape according to claim 1, characterized in that: The thickness of the acrylic foam adhesive layer is 600-800 μm.

9. A method for preparing a high temperature resistant acrylic foam tape according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Preparation of acrylic foam adhesive: mixing isooctyl acrylate-acrylic acid copolymer, a crosslinking aid, hollow glass microspheres, a high-temperature resistant resin, a photoinitiator, a foaming agent, and a colorant to prepare a mixture; S2. Coating the mixture on the surface of the first release film, then covering it with the second release film, and reacting it with light to obtain a high-temperature resistant acrylic foam tape.

10. The method for preparing a high temperature resistant acrylic foam tape according to claim 9, characterized in that: The light intensity in step S2 is 3000-3500 mj / cm 2 , the lighting time is 10-16min.

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