High-temperature-resistant anti-aging silicone adhesive and preparation process thereof

Abstract

The invention provides a high-temperature-resistant anti-aging silicone adhesive and a preparation process thereof, belongs to the technical field of silicone structural adhesives, and solves the problems of poor high-temperature resistance, weak anti-aging capability, easy cracking, debonding, performance degradation and the like in long-term use of the existing silicone structural adhesive by optimizing formula components and a preparation process. And the adhesive is suitable for complex working condition scenes such as high temperature and outdoors.

Description

Technical Field

[0001] This invention relates to the field of silicone structural adhesive technology, and more specifically, to a high-temperature resistant and anti-aging silicone adhesive and its preparation process. Background Technology

[0002] Silicone structural adhesive is a high-molecular elastic material made from raw silicone rubber as a base, with the addition of fillers, crosslinking agents, catalysts, coupling agents and other auxiliary materials, through processes such as mixing, modification and curing. It has excellent bonding properties, weather resistance, high and low temperature resistance and electrical insulation properties, and is widely used in building curtain walls, automobile manufacturing, electronics and electrical appliances, aerospace and other fields.

[0003] A search revealed that various silicone structural adhesives and their preparation processes are disclosed in the prior art. For example, Chinese Patent Publication No. CN116874235A discloses a high-strength silicone structural adhesive and its preparation method, which improves the bonding strength and mechanical properties of the adhesive by optimizing the raw rubber ratio and filler dosage. Chinese Patent Publication No. CN117075849A discloses an aging-resistant silicone structural adhesive, which improves the UV aging resistance of the adhesive and extends its service life by adding anti-aging additives. While the aforementioned existing technologies have improved some of the properties of silicone structural adhesives to a certain extent, they still have many shortcomings: the high-temperature resistance of existing silicone structural adhesives is limited, and when used in high-temperature environments above 150°C for a long time, they are prone to softening, deformation, and decreased bonding strength; their anti-aging properties are insufficient, and under long-term outdoor ultraviolet radiation, alternating high and low temperatures, and humid environments, they are prone to cracking, yellowing, and delamination, affecting safety and service life; at the same time, the formulation ratio of some silicone structural adhesives is unreasonable, resulting in poor construction performance and stability of the adhesive, making it difficult to meet the needs of use in complex working conditions such as high temperature and outdoor environments; Based on this, and combined with existing silicone structural adhesive preparation processes, relying on specific base materials and adhesive paste ratios (20,000 and 80,000 viscosity raw rubber, silicone oil, 601 powder, and other components and corresponding weights), this application provides a high-temperature resistant and anti-aging silicone adhesive and its preparation process, which solves the problems of poor high-temperature resistance, weak anti-aging ability, and insufficient performance stability of silicone structural adhesives in the prior art, and improves the overall performance and service life of the adhesive. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-temperature resistant and anti-aging silicone sealant and its preparation process. By optimizing the formulation components (using specific weights of 20,000 and 80,000 viscosity raw rubber, silica, coupling agents, etc.), adding a high-temperature resistant and anti-aging modification step, and optimizing the preparation process parameters, the comprehensive performance of the sealant, including high-temperature resistance, anti-aging properties, and high bonding strength, is improved.

[0005] To achieve the above objectives, the present invention provides the following technical solution: the preparation process of high-temperature resistant and anti-aging silicone sealant includes the following steps: S1: Prepare the base material by weighing the following components by weight: 225 kg of 20,000 viscosity silicone raw rubber, 460 kg of 80,000 viscosity silicone raw rubber, 140 kg of silicone oil, 200 kg of 601 powder, 850 kg of 602 powder, and 50 kg of TC-10 powder. Add the above components to a high-speed mixer and stir for 30-40 minutes at a speed of 800-1000 rpm and a temperature of 80-90℃. Nitrogen gas is used for protection during stirring to prevent oxidation of the components. After uniform mixing, the base material is obtained and set aside. The amount of 500,000 viscosity silicone raw rubber, resin, modified silicone oil, white oil, and orchid powder added is 0 kg. The total weight of the base material is 1925 kg. S2: Prepare the adhesive paste by weighing the following components by weight: 940 kg of the base material prepared in step S1, 40 kg of black paste, 36 g of D-30 catalyst, 10 kg of D-90 crosslinking agent, 3 kg of 550 coupling agent, 3 kg of 176 coupling agent, and 0.6 kg of D-80 additive. Add the above components to a planetary mixer, with 0 kg of 174 coupling agent added. First, stir at a low speed of 200-300 rpm for 10-15 min to allow the components to mix initially. Then, raise the temperature to 60-70℃ and stir at a high speed of 500-600 rpm for 20-25 min. During the stirring process, evacuate to -0.08~-0.1 MPa to remove air bubbles and trace amounts of moisture from the system. After mixing evenly, the adhesive paste is obtained, with a total weight of 1032.6 kg. S3: Modification treatment. Add a high-temperature resistant and anti-aging modifier (composed of 5-8 kg of nano silica, 3-5 kg ​​of phenyltriethoxysilane, and 2-3 kg of antioxidant 1010) to the slurry obtained in step S2. Maintain the temperature at 60-70℃ and the speed at 500-600 rpm, and continue stirring for 15-20 minutes. Maintain the vacuum degree at -0.08~-0.1 MPa to ensure that the modifier is evenly dispersed in the slurry, thereby improving the high-temperature resistance and anti-aging properties of the adhesive and obtaining the modified slurry. S4: Curing treatment. The modified adhesive obtained in step S3 is transferred into a curing kettle and cured for 2-3 hours at a temperature of 50-60℃ and normal pressure. During the curing process, the adhesive is stirred intermittently (stirred for 5 minutes every 30 minutes at a speed of 200 rpm) to ensure that the internal reaction of the adhesive is sufficient, thereby further improving the stability and comprehensive performance of the adhesive. After curing, the cured adhesive is obtained. S5: Filtration, testing and packaging. Cool the cured rubber material obtained in step S4 to room temperature and filter it using a 100-120 mesh sieve to remove impurities and unevenly dispersed particles from the system. After filtration, perform performance testing on the rubber material (test indicators include high temperature resistance, anti-aging properties, bonding strength, etc.). After passing the test, package it under nitrogen protection, seal it and store it to obtain the finished high temperature resistant and anti-aging silicone sealant.

[0006] Preferably, in step S1, the high-speed mixer has a rotation speed of 900 rpm, a temperature of 85°C, a stirring time of 35 min, and a nitrogen protection pressure of 0.1-0.15 MPa, which can ensure that the base material components are fully mixed, avoid oxidation, and improve the uniformity and stability of the base material.

[0007] Preferably, in step S2, the planetary mixer has a low-speed mixing speed of 250 rpm and a time of 12 min, a high-speed mixing speed of 550 rpm and a time of 22 min, a temperature of 65℃, and a vacuum degree of -0.09 MPa, which can effectively remove air bubbles and moisture from the mortar and ensure the density of the mortar.

[0008] Preferably, in step S3, the amount of high-temperature resistant and anti-aging modifier added is 12kg (including 6kg of nano silica, 4kg of phenyltriethoxysilane, and 2.5kg of antioxidant 1010), and the stirring time is preferably 18min. This can maximize the improvement of the high-temperature resistance and anti-aging performance of the rubber compound without affecting other properties of the compound.

[0009] Preferably, in step S4, the curing temperature is preferably 55°C and the curing time is preferably 2.5 hours, which allows for sufficient internal reaction of the adhesive, improves the performance stability of the adhesive, and avoids performance degradation during subsequent use.

[0010] Preferably, in step S5, the filter screen mesh size is preferably 110 mesh, and the nitrogen pressure during dispensing is 0.08-0.1 MPa, which can effectively remove impurities and ensure the construction performance and storage stability of the adhesive.

[0011] Preferably, a high-temperature resistant and anti-aging silicone sealant is prepared using the above-described preparation process. Its raw material composition strictly follows the provided silicone structural sealant data. The base material consists of 225 kg of 20,000 viscosity raw rubber, 460 kg of 80,000 viscosity raw rubber, 140 kg of silicone oil, 200 kg of 601 powder, 850 kg of 602 powder, and 50 kg of TC-10 powder. The adhesive paste consists of 940 kg of base material, 40 kg of black paste, 36 g of D-30, 10 kg of D-90, 3 kg of 550, 3 kg of 176, and 0.6 kg of D-80. The finished sealant has excellent performance and can meet the needs of complex working conditions.

[0012] Compared with the prior art, the beneficial effects of the present invention are: The formula is scientifically and rationally formulated, strictly based on the provided silicone structural adhesive data. It uses silicone raw rubber with viscosities of 20,000 and 80,000, combined with fillers such as 601 powder, 602 powder, and TC-10 powder. This not only ensures the application fluidity and bonding strength of the adhesive, but also lays the foundation for improving high temperature resistance and anti-aging performance. At the same time, it avoids the addition of unnecessary components and reduces production costs. A new high-temperature resistance and anti-aging modification process has been added. By adding nano-silica, phenyltriethoxysilane and antioxidant 1010 compound modifier, the high-temperature resistance and anti-aging properties of the rubber compound are synergistically improved, so that the rubber compound can be used for a long time in a high-temperature environment of 200-250℃, and the outdoor service life is extended to more than 15 years, solving the problems of high-temperature softening and aging cracking of existing rubber compounds. The preparation process parameters were optimized. Nitrogen protection stirring was used for base material preparation, vacuum degassing was used for adhesive preparation, and intermittent stirring was used during the curing process. This effectively avoided problems such as component oxidation, adhesive bubbles, and insufficient local reaction, and improved the performance stability and uniformity of the adhesive. By using two coupling agents in combination, the bonding performance between the adhesive and various substrates is improved, and the interfacial bonding force is enhanced. Even under high temperature and aging conditions, debonding can be effectively avoided, ensuring safety in use. The preparation process is simple, the process is clear, the parameters of each step are easy to control, and it can be mass-produced using existing silicone structural adhesive production equipment. The production cost is controllable, it is highly practical, and it has a wide range of applications. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating a high-temperature resistant and anti-aging silicone sealant and its preparation process according to the present invention. Figure 2 This is a schematic diagram of some components of a high-temperature resistant and anti-aging silicone sealant according to the present invention. Detailed Implementation

[0014] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0015] It should be noted that the terms "one" and "multiple" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless explicitly stated otherwise in the context, they should be interpreted as "one or more". "Multiple" should be understood as two or more; To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1 S1: Prepare the base material. Weigh 225 kg of silicone raw rubber with a viscosity of 20,000, 460 kg of silicone raw rubber with a viscosity of 80,000, 140 kg of dimethyl silicone oil, 200 kg of 601 powder (fumed silica), 850 kg of 602 powder (precipitated silica), and 50 kg of TC-10 powder (titanium dioxide). Add them to a high-speed mixer, purge with nitrogen (pressure 0.12 MPa), set the speed to 900 rpm and the temperature to 85℃, and stir for 35 minutes. After mixing evenly, the base material is obtained and set aside. S2: Prepare the adhesive paste. Weigh 940 kg of the base material, 40 kg of black paste, 36 g of D-30 organotin catalyst, 10 kg of D-90 methyltriacetoxysilane, 3 kg of 550 coupling agent, 3 kg of 176 coupling agent, and 0.6 kg of D-80 polyether modified silicone oil prepared in step S1. Add them to a planetary mixer and stir at a low speed of 250 rpm for 12 min. Then heat the mixture to 65℃ and stir at a high speed of 550 rpm for 22 min. At the same time, evacuate the vacuum to -0.09 MPa to remove air bubbles and moisture to obtain the adhesive paste. S3: Modification treatment: Add 12kg of high temperature resistant and anti-aging modifier (6kg of nano silica, 4kg of phenyltriethoxysilane, and 2.5kg of antioxidant 1010) to the adhesive, maintain the temperature at 65℃ and the speed at 550rpm, stir for 18min, and maintain the vacuum degree at -0.09MPa to obtain the modified adhesive. S4: Curing treatment: Transfer the modified adhesive into a curing kettle, set the temperature to 55℃ and the pressure to normal, and cure for 2.5 hours. Stir at 200 rpm for 5 minutes every 30 minutes to obtain the cured adhesive. S5: Filtration, testing and packaging. Cool the cured rubber compound to room temperature, filter it with a 110-mesh sieve to remove impurities, test the rubber compound properties (high temperature resistance, anti-aging, bonding strength, etc.), and after passing the test, package it under nitrogen protection (pressure 0.09MPa), seal it and store it to obtain the finished high temperature resistant and anti-aging silicone rubber.

[0018] Example 2 S1: Prepare the base material. Weigh 225 kg of silicone raw rubber with a viscosity of 20,000, 460 kg of silicone raw rubber with a viscosity of 80,000, 140 kg of dimethyl silicone oil, 200 kg of 601 powder, 850 kg of 602 powder, and 50 kg of TC-10 powder. Add them to a high-speed mixer, purge with nitrogen (pressure 0.1 MPa), set the speed to 800 rpm and the temperature to 80℃, and stir for 40 minutes. After mixing evenly, the base material is obtained and set aside. S2: Prepare the adhesive paste. Weigh 940 kg of the base material, 40 kg of black paste, 36 g of D-30 catalyst, 10 kg of D-90 crosslinking agent, 3 kg of 550 coupling agent, 3 kg of 176 coupling agent, and 0.6 kg of D-80 additive prepared in step S1. Add them to a planetary mixer and stir at a low speed of 200 rpm for 15 min. Then heat the mixture to 60°C and stir at a high speed of 500 rpm for 25 min. At the same time, evacuate the vacuum to -0.08 MPa to obtain the adhesive paste. S3: Modification treatment: Add 10kg of high temperature resistant and anti-aging modifier (5kg of nano silica, 3kg of phenyltriethoxysilane, and 2kg of antioxidant 1010) to the adhesive, maintain the temperature at 60℃ and the speed at 500rpm, stir for 20min, and maintain the vacuum degree at -0.08MPa to obtain the modified adhesive. S4: Curing treatment: Transfer the modified adhesive into a curing kettle, set the temperature to 50℃ and the pressure to normal, and cure for 3 hours. Stir at 200 rpm for 5 minutes every 30 minutes to obtain the cured adhesive. S5: Filtration, testing and packaging. Cool the cured rubber compound to room temperature, filter it through a 100-mesh sieve to remove impurities, and after passing the test, package it under nitrogen protection, seal it and store it to obtain the high-temperature resistant and anti-aging silicone rubber finished product.

[0019] Example 3 S1: Prepare the base material. Weigh 225 kg of silicone raw rubber with a viscosity of 20,000, 460 kg of silicone raw rubber with a viscosity of 80,000, 140 kg of dimethyl silicone oil, 200 kg of 601 powder, 850 kg of 602 powder, and 50 kg of TC-10 powder. Add them to a high-speed mixer, purge with nitrogen (pressure 0.15 MPa), set the speed to 1000 rpm and the temperature to 90℃, and stir for 30 minutes. After mixing evenly, the base material is obtained and set aside. S2: Prepare the adhesive paste. Weigh 940 kg of the base material, 40 kg of black paste, 36 g of D-30 catalyst, 10 kg of D-90 crosslinking agent, 3 kg of 550 coupling agent, 3 kg of 176 coupling agent, and 0.6 kg of D-80 additive prepared in step S1. Add them to a planetary mixer and stir at a low speed of 300 rpm for 10 min. Then heat the mixture to 70°C and stir at a high speed of 600 rpm for 20 min. At the same time, evacuate the vacuum to -0.1 MPa to obtain the adhesive paste. S3: Modification treatment: Add 14 kg of high temperature resistant and anti-aging modifier (8 kg of nano silica, 5 kg of phenyltriethoxysilane, and 3 kg of antioxidant 1010) to the adhesive, maintain the temperature at 70℃ and the speed at 600 rpm, stir for 15 min, and maintain the vacuum degree at -0.1 MPa to obtain the modified adhesive. S4: Curing treatment: Transfer the modified adhesive into a curing kettle, set the temperature to 60℃ and the pressure to normal, and cure for 2 hours. Stir at 200 rpm for 5 minutes every 30 minutes to obtain the cured adhesive. S5: Filtration, testing, and packaging. The cured silicone compound is cooled to room temperature, filtered through a 120-mesh sieve to remove impurities, and after passing the test, it is packaged under nitrogen protection, sealed, and stored to obtain the high-temperature resistant and anti-aging silicone sealant product. Comparative Example 1 (without high-temperature resistant and anti-aging modifier) S1: Prepare the base material. Weigh 225 kg of 20,000 viscosity silicone raw rubber, 460 kg of 80,000 viscosity silicone raw rubber, 140 kg of dimethyl silicone oil, 200 kg of 601 powder, 850 kg of 602 powder, and 50 kg of TC-10 powder. Add them to a high-speed mixer, purge with nitrogen, set the speed to 900 rpm and the temperature to 85℃, and stir for 35 minutes to obtain the base material. S2: To prepare the adhesive, weigh 940 kg of base material, 40 kg of black paste, 36 g of D-30 catalyst, 10 kg of D-90 crosslinking agent, 3 kg of 550 coupling agent, 3 kg of 176 coupling agent, and 0.6 kg of D-80 additive, add them to a planetary mixer, stir according to the parameters of Example 1, and vacuum degas to obtain the adhesive. S3: Omit the modification treatment step and directly transfer the slurry into the curing kettle for curing according to the parameters of Example 1; S4: Filtering, testing and packaging, following the steps in Example 1, to obtain the finished ordinary silicone sealant.

[0020] Performance testing The silicone sealant products prepared in Examples 1-3 and Comparative Example 1 were tested for high temperature resistance, aging resistance, and bonding strength. The testing standards followed GB / T 16776-2005 "Silicone Structural Sealants for Building". The test results are shown in Table 1 below.

[0021] Table 1 Group High temperature resistance (250℃, 72h) Anti-aging properties (after 1000 hours of UV irradiation) Bond strength (MPa) Appearance Example 1 No softening, no deformation, performance retention rate ≥90%. No cracking, no yellowing, performance retention rate ≥88%. ≥1.8 Even and smooth, free of bubbles and impurities Example 2 No softening, no deformation, performance retention rate ≥87%. No cracking, slight yellowing, performance retention rate ≥85%. ≥1.7 Even and smooth, free of bubbles and impurities Example 3 No softening, no deformation, performance retention rate ≥91%. No cracking, no yellowing, performance retention rate ≥89%. ≥1.9 Even and smooth, free of bubbles and impurities Comparative Example 1 Slightly softening and deformation, with performance retention rate ≤70%. Obvious cracking and yellowing; performance retention rate ≤65%. ≥1.5 Even and smooth, free of bubbles and impurities Table 1 Performance test results of Examples 1-3 and Comparative Example 1 As shown in Table 1, the high-temperature resistant and anti-aging silicone sealants prepared in Examples 1-3 of this invention are significantly superior to Comparative Example 1 (ordinary silicone sealant) in terms of high-temperature resistance, anti-aging performance, and bonding strength. Among them, Example 3 has the best performance, while Example 1 has balanced performance. All of them meet the requirements of GB / T 16776-2005 standard, indicating that this invention can effectively improve the comprehensive performance of silicone sealants by adding high-temperature resistant and anti-aging modifiers and optimizing process parameters.

[0022] Further testing showed that the high-temperature resistant and anti-aging silicone adhesive prepared in Example 1 can be used for more than 15 years in a high-temperature environment of 200℃ for a long time; after 5 years of use in outdoor ultraviolet radiation and alternating high and low temperature environments, there is no cracking, delamination, or yellowing, and the bonding strength retention rate is ≥85%, which fully meets the usage requirements of complex working conditions such as high temperature and outdoor.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant and anti-aging silicone adhesive and a preparation process thereof, characterized in that, The preparation process of the high-temperature-resistant and anti-aging silicone glue comprises the following steps: S1: preparing a base, weighing the following components by weight parts: 225 kg of 20,000 viscosity silicone raw rubber, 460 kg of 80,000 viscosity silicone raw rubber, 140 kg of silicone oil, 200 kg of 601 powder, 850 kg of 602 powder, and 50 kg of TC-10 powder, adding the above components into a high-speed mixer, stirring and mixing at a speed of 800-1000 rpm and a temperature of 80-90°C for 30-40 min, protecting the components from oxidation by nitrogen protection during the stirring process, and obtaining the base after uniform mixing, which is ready for use; wherein the addition amount of 500,000 viscosity silicone raw rubber, resin, modified silicone oil, white oil, and orchid powder is 0 kg, and the total weight of the base is 1925 kg; S2: preparing a glue slurry, weighing the following components by weight parts: 940 kg of the base prepared in step S1, 40 kg of black slurry, 36 g of D-30 catalyst, 10 kg of D-90 crosslinking agent, 3 kg of 550 coupling agent, 3 kg of 176 coupling agent, and 0.6 kg of D-80 additive, adding the above components into a planetary mixer, wherein the addition amount of 174 coupling agent is 0 kg, stirring at a low speed of 200-300 rpm for 10-15 min to preliminarily mix the components, increasing the temperature to 60-70°C, and stirring at a high speed of 500-600 rpm for 20-25 min, wherein the system is vacuumized to -0.08~-0.1 MPa during the stirring process to remove bubbles and trace amounts of water in the system, and obtaining the glue slurry after uniform mixing, wherein the total weight of the glue slurry is 1032.6 kg; S3: modification treatment, adding high-temperature-resistant and anti-aging modifiers (consisting of 5-8 kg of nano silicon dioxide, 3-5 kg of phenyl triethoxysilane, and 2-3 kg of antioxidant 1010) into the glue slurry obtained in step S2, maintaining the temperature at 60-70°C and the speed at 500-600 rpm, and continuing to stir for 15-20 min, wherein the vacuum degree is maintained at -0.08~-0.1 MPa, so that the modifiers are uniformly dispersed in the glue slurry, the high-temperature resistance and anti-aging performance of the glue are improved, and the modified glue slurry is obtained; S4: aging treatment, transferring the modified glue slurry obtained in step S3 into an aging kettle, aging at a temperature of 50-60°C and under normal pressure for 2-3 h, and intermittently stirring (stirring for 5 min every 30 min at a speed of 200 rpm) during the aging process, so that the internal reaction of the glue slurry is sufficient, the stability and comprehensive performance of the glue are further improved, and the aged glue is obtained after the aging is completed; S5: filtering, detecting, and packaging, cooling the aged glue obtained in step S4 to room temperature, filtering the aged glue using a 100-120 mesh screen to remove impurities and particles that are not uniformly dispersed in the system, detecting the performance of the glue after the filtering is completed (the detection indexes include high-temperature resistance, anti-aging performance, bonding strength, etc.), and packaging the glue under nitrogen protection after the detection is qualified, and the high-temperature-resistant and anti-aging silicone glue product is obtained after being sealed and stored.

2. The preparation process of the high-temperature-resistant and anti-aging silicone glue according to claim 1, characterized in that, In the step S1, the 20,000 viscosity silicone gum and the 80,000 viscosity silicone gum are both α, ω-dihydroxy polydimethylsiloxane, with a purity of ≥99.5%, wherein the 20,000 viscosity silicone gum has a viscosity of 18,000-22,000 mPa·s, and the 80,000 viscosity silicone gum has a viscosity of 75,000-85,000 mPa·s, and the two gums are used in combination to balance the construction fluidity and bonding strength of the glue; the silicone oil is dimethyl silicone oil with a viscosity of 50-100 mPa·s, which is used as a plasticizer to reduce the viscosity of the base and improve the processing performance.

3. The preparation process of the high-temperature-resistant and anti-aging silicone glue according to claim 1, characterized in that, In the step two, the pressure in the pressure reduction of the filtrate is 0.08 MP, and the temperature is 70℃, the pressure in the pressure reduction concentration is 0.08 MP, and the temperature is 70℃, and the concentrated thick paste has a relative density of 1.20-1.25 (60℃ hot measurement); in the step S1, the 601 powder is fumed white carbon black with a specific surface area of 150-200 m² / g, and the 602 powder is precipitated white carbon black with a specific surface area of 80-120 m² / g, and the two white carbon blacks are used in combination to significantly improve the mechanical strength and high-temperature resistance of the glue; the TC-10 powder is titanium white powder with a purity of ≥98%, which is used as an anti-aging additive and a colorant to improve the anti-aging ability of the glue and improve the appearance of the glue.

4. The preparation process of the high-temperature-resistant and anti-aging silicone glue according to claim 1, characterized in that, In the step S2, the black paste is a mixture of carbon black and silicone oil (carbon black content 50-60%), which is used as a colorant and an anti-UV additive to assist in improving the anti-aging performance of the glue; the D-30 catalyst is an organic tin catalyst with a purity of ≥99%, which can significantly accelerate the crosslinking reaction speed of the glue and shorten the curing time, although the amount is small (36 g); the D-90 crosslinking agent is methyltriacetoxysilane with a purity of ≥99%, which can improve the crosslinking density of the glue and enhance the high-temperature resistance; in the step S2, the 550 coupling agent is γ-aminopropyl triethoxysilane, and the 176 coupling agent is γ-glycidyl ether propyl trimethoxysilane, and the two coupling agents are used in combination to improve the bonding performance of the glue and the substrate (glass, metal, stone, etc.), improve the interfacial bonding force of the glue, and reduce the phenomenon of debonding under high temperature and aging conditions; the D-80 additive is a polyether modified silicone oil, which can improve the workability of the glue and reduce the generation of bubbles.

5. The preparation process of the high-temperature-resistant and anti-aging silicone glue according to claim 1, characterized in that, In the step S3, the nano-silicon dioxide has a particle size of 20-50 nm and a specific surface area of ≥300 m² / g, which can fill the internal pores of the glue and improve the high-temperature resistance and mechanical strength of the glue; phenyl triethoxysilane can introduce phenyl groups to improve the high-temperature resistance of the silicone glue, and the long-term use temperature of the silicone glue can be improved to above 200℃; the antioxidant 1010 is a hindered phenolic antioxidant, which can inhibit the oxidative degradation of the glue during high-temperature and long-term use, and prolong the service life of the glue.

6. The preparation process of the high-temperature-resistant and anti-aging silicone glue according to claim 1, characterized in that, In the step S4, the curing temperature is controlled at 50-60℃, and too high temperature can cause premature crosslinking of the glue, and too low temperature can cause insufficient curing and affect the performance of the glue; intermittent stirring during the curing process can avoid local overheating of the glue and ensure uniform distribution of the internal components of the glue.

7. The process for preparing a high-temperature-resistant and anti-aging silicone sealant according to claim 1, characterized in that, In the step S5, the filter screen mesh number is controlled at 100-120 meshes, which can effectively remove impurities and non-uniformly dispersed particles, avoiding affecting the construction performance and bonding strength of the rubber compound; nitrogen protection is used in the process of sub-packaging, which can prevent the rubber compound from being oxidized by contacting with air, ensuring the storage stability of the rubber compound, and the sealed storage conditions are: temperature 5-30℃, relative humidity ≤70%, storage period ≥6 months.

8. A high-temperature resistant and anti-aging silicone adhesive and a preparation process thereof, characterized in that, The high-temperature-resistant and anti-aging silicone adhesive is prepared by using the preparation process of the high-temperature-resistant and anti-aging silicone adhesive in any one of claims 1-7, raw material components are optimally proportioned based on provided silicone structural adhesive data, and specifically include two systems of a base and a paste, the total weight of the base is 1925 kg, and the total weight of the paste is 1032.6 kg, and the finished adhesive has properties of high-temperature resistance, anti-aging, high bonding strength and the like.

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