Xenon lamp aging resistant silicone rubber material and preparation method thereof

Abstract

The invention discloses a xenon lamp aging resistant silicone rubber material and a preparation method thereof. The xenon lamp aging resistant silicone rubber material is prepared from the following raw materials in parts by weight: 100 parts of linear polysiloxane, 80-120 parts of a functional reinforcing agent, 5-8 parts of a structure control agent, 7-10 parts of a process additive, 2-5 parts of an active heat-resistant additive, 1-3 parts of a mildew preventive and 1-3 parts of a vulcanizing agent. The functional reinforcing agent comprises tetraethoxysilane modified nano silicon dioxide, and the weight content of the tetraethoxysilane modified nano silicon dioxide in the functional reinforcing agent is greater than or equal to 50%. The rubber material provided by the invention has excellent basic mechanical properties, thermal oxidation and high-temperature aging resistance, xenon lamp aging resistance and low-temperature brittleness, and also has good mildew resistance, the applicable aging-resistant application range of the silicone rubber material is further expanded, and the service life is prolonged; the nano silicon dioxide is modified, so that the anti-aging performance of the rubber material is synergistically enhanced.

Description

Technical Field

[0001] This invention belongs to the field of rubber materials technology, specifically relating to a xenon lamp aging resistant silicone rubber material and its preparation method. Background Technology

[0002] The main factors causing material aging are sunlight and humidity, with sunlight being a major contributor to the degradation of many materials. Automotive materials, especially non-metallic materials (plastics, rubber, and paint films), are inevitably subject to varying degrees of aging during use due to the influence of different climatic environments. To slow down the aging of automotive parts and materials, and to study the impact of environmental aging on material performance, outdoor exposure tests are often used to predict their service life. However, outdoor exposure tests have long testing cycles, making it difficult to match with the overall vehicle development schedule. Laboratories typically use methods such as xenon lamp aging tests to simulate and enhance outdoor environmental factors to shorten the testing cycle. It is well known that the aging factors of most polymer materials are mainly the synergistic effects of light, temperature, and humidity: short-wave ultraviolet light with high energy is absorbed by the macromolecular chains and decomposes according to the free radical mechanism. Simultaneously, ambient temperature and humidity accelerate this process, leading to defects such as pulverization, seepage, cracking, and deformation in polymer materials.

[0003] With the booming development of China's automotive industry, the demand for high-performance materials is increasing. The development of rubber materials for xenon lamp aging focuses on addressing the issue that the aging characteristics of high-performance xenon lamps cannot meet market demands, and the large rate of performance change limits the application range of specialty silicone rubbers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a xenon lamp aging resistant silicone rubber material and its preparation method, which possesses excellent basic mechanical properties, resistance to high-temperature aging with heat and oxygen, resistance to xenon lamp aging, and low-temperature brittleness.

[0005] A type of xenon lamp aging resistant silicone rubber material is composed of the following raw materials in parts by weight: 100 parts linear polysiloxane, 80-120 parts functional reinforcing agent, 5-8 parts structure control agent, 7-10 parts process aid, 2-5 parts active heat-resistant additive, 1-3 parts mildew inhibitor, and 1-3 parts vulcanizing agent. The functional reinforcing agent comprises tetraethoxysilane-modified nano-silica, and the tetraethoxysilane-modified nano-silica accounts for ≥50% of the weight of the functional reinforcing agent.

[0006] Preferably, the tetraethoxysilane-modified nano-silica is prepared by the following method: drying the nano-silica, cooling it to room temperature, adding it to an ethanol solution of tetraethoxysilane while stirring, stirring evenly, adding distilled water dropwise, heating to 95-100℃ and refluxing for 6-8 hours, cooling to room temperature, filtering, washing and drying.

[0007] Preferably, the concentration of the ethanol solution of tetraethoxysilane is 1-2 wt%, and the mass ratio of the nano-silica, the ethanol solution of tetraethoxysilane, and distilled water is 100:(160-200):1.

[0008] Preferably, the functional reinforcing agent further includes any one or two of the following: silica micro powder, magnesium oxide, calcium silicate, wollastonite powder, and MQ type silicone resin.

[0009] Preferably, the structure control agent is any one of hydroxyl silicone oil, vinyltriethoxysiloxane, hexamethyldisilazane, and tetramethyldivinyldisilazane, or any combination of two of them in any ratio.

[0010] Preferably, the process aid is any one of aluminum nitride, boron nitride, graphene, and carbon nanotubes, or two of them in any ratio.

[0011] Preferably, the active heat-resistant additive is cerium oxide; or the active heat-resistant additive is a mixture of any one of titanium dioxide and zinc carbonate with cerium oxide, and the mass content of cerium oxide is ≥40%.

[0012] Preferably, the antifungal agent is any one of silver-based inorganic compound XY-K11, zinc-based inorganic compound XY-K10, organic heterocyclic derivative M-12, or borosilicate, or any combination of two of them.

[0013] Preferably, the vulcanizing agent is any one or any combination of two of the following: benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, dicumyl peroxide, and 2,5-dimethyl-2,5-di-tert-butylperoxide; and the linear polysiloxane has a molecular weight of 400,000 to 500,000.

[0014] A method for preparing a xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Add linear polysiloxane to the internal mixer, then add structure control agent and part of functional reinforcing agent. After mixing at 40-55℃ for 4-8 minutes, add the remaining functional reinforcing agent, process aid, and active heat-resistant additive. After mixing for 4-6 minutes, and the total time of the two mixing sessions should be greater than or equal to 10 minutes; adjust the roller gap, and roll through the sheet 6-8 times to get the sheet. After the sheet is left to stand for 24 hours, put it back into the internal mixer, and add antifungal agent and vulcanizing agent at the same time. After rolling through the sheet 6-8 times, it is cooled to get the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for ≥12h, it is hot-melted to obtain reclaimed rubber. The reclaimed rubber is put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 8-15min, the vulcanization temperature is 170-190℃, and the vulcanization pressure is 13-15MPa.

[0015] Advantages of this invention: (1) The rubber material provided by the present invention has excellent basic mechanical properties, heat and oxygen high-temperature aging resistance, xenon lamp aging resistance and low-temperature brittleness, and also has good mildew resistance. The application range of silicone rubber material for aging resistance is further expanded and the service life is extended. (2) Modifying nano-silica can synergistically enhance the aging resistance of rubber materials. Detailed Implementation

[0016] Example 1 A type of xenon lamp aging resistant silicone rubber material: composed of the following raw materials in parts by weight: 100 parts linear polysiloxane with a molecular weight of 400,000-500,000, 100 parts functional reinforcing agent, 6 parts structure control agent, 7 parts process aid, 4 parts active heat-resistant additive, 1.5 parts mildew inhibitor, and 1 part vulcanizing agent. The functional reinforcing agent is composed of tetraethoxysilane-modified nano-silica and MQ-type silicone resin in a mass ratio of 75:25. The tetraethoxysilane-modified nano-silica is prepared by the following method: the nano-silica is dried at 120°C for 2 hours, cooled to room temperature, and then added to a 1.5 wt% tetraethoxysilane ethanol solution while stirring. After stirring evenly, distilled water is added dropwise, the mixture is heated to 100°C and refluxed for 6 hours, cooled to room temperature, filtered, washed with deionized water, and dried at 120°C for 2 hours. The mass ratio of the nano-silica, the tetraethoxysilane ethanol solution, and the distilled water is 100:180:1. The structure control agent is hydroxyl silicone oil; The process aid is aluminum nitride; The active heat-resistant additive is cerium oxide; The antifungal agent is an organic heterocyclic derivative M-12; The vulcanizing agent is 2,5-dimethyl-2,5-di-tert-butylperoxide; The preparation method of the xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Linear polysiloxane is added to the internal mixer, then structure control agent and 60 parts of functional reinforcing agent are added. After mixing at 45°C for 6 minutes, the remaining 40 parts of functional reinforcing agent, process aid and active heat-resistant additive are added. After mixing for 5 minutes, the sheet is unloaded and the roller gap is adjusted. The sheet is rolled out 6 times and then left to stand for 24 hours. The sheet is then put back into the internal mixer. At the same time, antifungal agent and vulcanizing agent are added. After rolling out 8 times, the sheet is unloaded and cooled to obtain the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for 16 hours, it is hot-processed to obtain reclaimed rubber. The reclaimed rubber is then put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 10 minutes, the vulcanization temperature is 170℃, and the vulcanization pressure is 13MPa.

[0017] Example 2 A type of xenon lamp aging resistant silicone rubber material: composed of the following raw materials in parts by weight: 100 parts of linear polysiloxane with a molecular weight of 400,000-500,000, 110 parts of functional reinforcing agent, 8 parts of structure control agent, 8 parts of process aid, 3 parts of active heat-resistant additive, 2 parts of mildew inhibitor, and 2 parts of vulcanizing agent. The functional reinforcing agent is composed of tetraethoxysilane-modified nano-silica and silica micro powder in a mass ratio of 73:27; the tetraethoxysilane-modified nano-silica is the same as that in Example 1; The structure control agent is composed of hydroxyl silicone oil and vinyltriethoxysiloxane in a mass ratio of 75:25; The process aid is boron nitride; The active heat-resistant additive is cerium oxide; The antifungal agent is composed of an organic heterocyclic derivative M-12 and a borosilicate Y1033 in equal mass ratio; the vulcanizing agent is benzoyl peroxide. The preparation method of the xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Linear polysiloxane is added to the internal mixer, then structure control agent and 60 parts of functional reinforcing agent are added. After mixing at 50°C for 8 minutes, the remaining 50 parts of functional reinforcing agent, process aid and active heat-resistant additive are added. After mixing for 6 minutes, the sheet is unloaded and the roller gap is adjusted. The sheet is rolled out 8 times and then placed in the internal mixer again after 24 hours. At the same time, antifungal agent and vulcanizing agent are added. After rolling out 8 times, the sheet is unloaded and cooled to obtain the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for 18 hours, it is hot-processed to obtain reclaimed rubber. The reclaimed rubber is then put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 12 minutes, the vulcanization temperature is 170℃, and the vulcanization pressure is 13MPa.

[0018] Example 3 A type of xenon lamp aging resistant silicone rubber material: composed of the following raw materials in parts by weight: 100 parts linear polysiloxane with a molecular weight of 400,000-500,000, 120 parts functional reinforcing agent, 8 parts structure control agent, 9 parts process aid, 5 parts active heat-resistant additive, 3 parts mildew inhibitor, and 3 parts vulcanizing agent. The functional reinforcing agent is tetraethoxysilane-modified nano-silica, which is the same as that in Example 1; The structure control agent is hydroxyl silicone oil; The process aid is graphene; The active heat-resistant additive is cerium oxide; The antifungal agent is an organic heterocyclic derivative M-12; The vulcanizing agent is composed of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane; The preparation method of the xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Linear polysiloxane is added to the internal mixer, then structure control agent and 80 parts of functional reinforcing agent are added. After mixing at 55°C for 8 minutes, the remaining 40 parts of functional reinforcing agent, process aid and active heat-resistant additive are added. After mixing for 6 minutes, the sheet is unloaded and the roller gap is adjusted. The sheet is rolled out 8 times and then placed in the internal mixer again after 24 hours. At the same time, antifungal agent and vulcanizing agent are added. After rolling out 8 times, the sheet is unloaded and cooled to obtain the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for 20 hours, it is hot-processed to obtain reclaimed rubber. The reclaimed rubber is then put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 12 minutes, the vulcanization temperature is 170℃, and the vulcanization pressure is 15MPa.

[0019] Example 4 A type of xenon lamp aging resistant silicone rubber material: composed of the following raw materials in parts by weight: 100 parts linear polysiloxane with a molecular weight of 400,000-500,000, 95 parts functional reinforcing agent, 6.5 parts structure control agent, 7 parts process aid, 2 parts active heat-resistant additive, 2 parts mildew inhibitor, and 2 parts vulcanizing agent. The functional reinforcing agent is tetraethoxysilane-modified nano-silica, which is the same as that in Example 1; The structure control agent is hydroxyl silicone oil; The process aid is carbon nanotubes; The active heat-resistant additive is cerium oxide; The antifungal agent is an organic heterocyclic derivative M-12; The vulcanizing agent is composed of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane; The preparation method of the xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Linear polysiloxane is added to the internal mixer, then structure control agent and 60 parts of functional reinforcing agent are added. After mixing at 45°C for 7 minutes, the remaining 35 parts of functional reinforcing agent, process aid and active heat-resistant additive are added. After mixing for 6 minutes, the sheet is unloaded and the roller gap is adjusted. The sheet is rolled out 7 times and left to stand for 24 hours. Then it is put back into the internal mixer. At the same time, antifungal agent and vulcanizing agent are added. After rolling out 6 times, the sheet is unloaded and cooled to obtain the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for 22 hours, it is hot-processed to obtain reclaimed rubber. The reclaimed rubber is then put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 10 minutes, the vulcanization temperature is 170℃, and the vulcanization pressure is 14MPa.

[0020] Example 5 A type of xenon lamp aging resistant silicone rubber material: composed of the following raw materials in parts by weight: 100 parts of linear polysiloxane with a molecular weight of 400,000-500,000, 115 parts of functional reinforcing agent, 8 parts of structure control agent, 10 parts of process aid, 5 parts of active heat-resistant additive, 2 parts of mildew inhibitor, and 2 parts of vulcanizing agent. The functional reinforcing agent is composed of tetraethoxysilane-modified nano-silica and silica micro powder, with the content of tetraethoxysilane-modified nano-silica being 69.56%, and the tetraethoxysilane-modified nano-silica being the same as in Example 1; The structure control agent is hydroxyl silicone oil; The process aid is graphene; The active heat-resistant additive is composed of cerium oxide and zinc carbonate, with the cerium oxide content being 40%. The antifungal agent is a zinc-based inorganic compound, XY-K10. The vulcanizing agent is composed of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane; The preparation method of the xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Linear polysiloxane is added to the internal mixer, then structure control agent and 75 parts of functional reinforcing agent are added. After mixing at 55°C for 8 minutes, the remaining 40 parts of functional reinforcing agent, process aid and active heat-resistant additive are added. After mixing for 6 minutes, the sheet is unloaded and the roller gap is adjusted. The sheet is rolled out 8 times and then placed in the internal mixer again after 24 hours. At the same time, antifungal agent and vulcanizing agent are added. After rolling out 8 times, the sheet is unloaded and cooled to obtain the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for 24 hours, it is hot-processed to obtain reclaimed rubber. The reclaimed rubber is then put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 12 minutes, the vulcanization temperature is 170℃, and the vulcanization pressure is 15MPa.

[0021] Example 6 The process aid used is carbon nanotubes, and the rest is the same as in Example 3.

[0022] Example 7 A type of xenon lamp aging resistant silicone rubber material: composed of the following raw materials in parts by weight: 100 parts of linear polysiloxane with a molecular weight of 400,000-500,000, 80 parts of functional reinforcing agent, 5 parts of structure control agent, 7 parts of process aid, 4 parts of active heat-resistant additive, 1 part of mildew inhibitor, and 1 part of vulcanizing agent. The functional reinforcing agent is composed of tetraethoxysilane-modified nano-silica and magnesium oxide, with the content of tetraethoxysilane-modified nano-silica being 50%. The tetraethoxysilane-modified nano-silica is prepared by the following method: the nano-silica is dried at 120°C for 2 hours, cooled to room temperature, and then a 1 wt% tetraethoxysilane ethanol solution is added under stirring. After stirring evenly, distilled water is added dropwise, the mixture is heated to 95°C and refluxed for 8 hours, cooled to room temperature, filtered, washed with deionized water, and dried at 120°C for 2 hours. The mass ratio of the nano-silica, the tetraethoxysilane ethanol solution, and the distilled water is 100:200:1. The structure control agent is a mixture of equal masses of tetramethyldivinyldisilazane and hexamethyldisilazane; The process aid is a mixture of aluminum nitride and boron nitride in equal mass ratios; The active heat-resistant additive is a mixture of cerium oxide and titanium dioxide in a mass ratio of 40:60; The antifungal agent is a silver-based inorganic compound XY-K11; The vulcanizing agent is 2,4-dichlorobenzoyl peroxide and dicumyl peroxide in equal mass ratio; The preparation method of the xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Linear polysiloxane is added to the internal mixer, then structure control agent and 40 parts of functional reinforcing agent are added. After mixing at 40°C for 4 minutes, the remaining 40 parts of functional reinforcing agent, process aid and active heat-resistant additive are added. After mixing for 6 minutes, the sheet is unloaded and the roller gap is adjusted. The sheet is rolled out 6 times and then left to stand for 24 hours. The sheet is then put back into the internal mixer. At the same time, antifungal agent and vulcanizing agent are added. After rolling out 8 times, the sheet is unloaded and cooled to obtain the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for 16 hours, it is hot-processed to obtain reclaimed rubber. The reclaimed rubber is then put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 8 minutes, the vulcanization temperature is 190℃, and the vulcanization pressure is 13MPa.

[0023] Example 8 A type of xenon lamp aging resistant silicone rubber material: composed of the following raw materials in parts by weight: 100 parts of linear polysiloxane with a molecular weight of 400,000-500,000, 100 parts of functional reinforcing agent, 5 parts of structure control agent, 7 parts of process aid, 4 parts of active heat-resistant additive, 1 part of mildew inhibitor, and 1 part of vulcanizing agent. The functional reinforcing agent is composed of tetraethoxysilane-modified nano-silica and calcium silicate, with the content of tetraethoxysilane-modified nano-silica being 80%. The tetraethoxysilane-modified nano-silica is prepared by the following method: the nano-silica is dried at 120°C for 2 hours, cooled to room temperature, and then a 2 wt% tetraethoxysilane ethanol solution is added under stirring. After stirring evenly, distilled water is added dropwise, the mixture is heated to 95°C and refluxed for 8 hours, cooled to room temperature, filtered, washed with deionized water, and dried at 120°C for 2 hours. The mass ratio of the nano-silica, the tetraethoxysilane ethanol solution, and the distilled water is 100:160:1. The structure control agent is hexamethyldisilazane; The process aid is aluminum nitride; The active heat-resistant additive is cerium oxide; The antifungal agent is a silver-based inorganic compound XY-K11; The vulcanizing agent is 2,4-dichlorobenzoyl peroxide in equal mass ratio; The preparation method of the xenon lamp aging resistant silicone rubber material includes the following steps: (1) Mixing: Linear polysiloxane is added to the internal mixer, then structure control agent and 60 parts of functional reinforcing agent are added. After mixing at 40°C for 8 minutes, the remaining 40 parts of functional reinforcing agent, process aid and active heat-resistant additive are added. After mixing for 4 minutes, the sheet is unloaded and the roller gap is adjusted. The sheet is rolled out 6 times and then left to stand for 24 hours. The sheet is then put back into the internal mixer. At the same time, antifungal agent and vulcanizing agent are added. After rolling out 8 times, the sheet is unloaded and cooled to obtain the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for 16 hours, it is hot-processed to obtain reclaimed rubber. The reclaimed rubber is then put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 15 minutes, the vulcanization temperature is 170℃, and the vulcanization pressure is 13MPa.

[0024] Comparative Example 1 The functional reinforcing agent used is calcium silicate, and the rest is the same as in Example 3.

[0025] Comparative Example 2 The functional reinforcing agent used is magnesium oxide, and the rest is the same as in Example 3.

[0026] Comparative Example 3 Nano-silica was used instead of tetraethoxysilane-modified nano-silica, meaning the nano-silica was not modified, and everything else was the same as in Example 3.

[0027] Comparative Example 4 All functional reinforcing agents were MQ type silicone resins, and the rest were the same as in Example 1.

[0028] Comparative Example 5 The nano-silica was not modified, and everything else was the same as in Example 1.

[0029] Performance testing 1. The performance of the silicone rubber materials provided in each embodiment and comparative example was tested. The hot air aging test conditions were aging at 200°C for 72 hours, and the xenon lamp aging test conditions were aging at room temperature for 360 hours. The results are shown in Table 1. Table 1. Properties of the silicone rubber materials provided in each embodiment and comparative example. As shown in Table 1, the xenon lamp resistant rubber material prepared in this invention has excellent basic mechanical properties, resistance to high-temperature aging and low-temperature brittleness. The addition of an appropriate amount of modified nano-silica has a synergistic effect on the resistance to high-temperature aging and xenon lamp aging of the silicone rubber material. When functional reinforcing agents such as magnesium oxide, calcium silicate and MQ type silicone resin are used respectively, the overall performance of the obtained rubber materials is significantly weaker than that of the rubber material of this invention.

[0030] 2. Investigate the effect of the content of different functional reinforcing agents on the properties of rubber materials. The weight ratio of the functional reinforcing agent was changed, and the rest was the same as in Example 3. The test conditions for hot air aging were aging at 200°C for 72 hours, and xenon lamp aging was aging at room temperature for 360 hours. The results are shown in Table 2. Table 2. Effect of functional reinforcing agent content on the properties of rubber materials As shown in Table 2, with the continuous increase of the mass fraction of modified nano-silica, the tensile strength, hardness, and volume resistivity of the rubber material continue to increase, while the low-temperature brittleness remains unchanged; and under certain aging conditions (thermal-oxidative aging and xenon lamp aging), the color difference change rate becomes smaller and smaller.

Claims

1. A xenon lamp aging resistant silicone rubber material, characterized in that: It is composed of the following raw materials in parts by weight: 100 parts linear polysiloxane, 80-120 parts functional reinforcing agent, 5-8 parts structure control agent, 7-10 parts process aid, 2-5 parts active heat-resistant additive, 1-3 parts mildew inhibitor, and 1-3 parts vulcanizing agent. The functional reinforcing agent comprises tetraethoxysilane-modified nano-silica, and the tetraethoxysilane-modified nano-silica accounts for ≥50% of the weight of the functional reinforcing agent.

2. The xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: The tetraethoxysilane-modified nano-silica is prepared by the following method: the nano-silica is dried, cooled to room temperature, added to an ethanol solution of tetraethoxysilane under stirring, stirred evenly, distilled water is added dropwise, heated to 95-100℃ and refluxed for 6-8 hours, cooled to room temperature, filtered, washed and dried.

3. The xenon lamp aging resistant silicone rubber material according to claim 2, characterized in that: The concentration of the ethanol solution of the tetraethoxysilane is 1-2 wt%, and the mass ratio of the nano-silica, the ethanol solution of the tetraethoxysilane, and the distilled water is 100:(160-200):

1.

4. The xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: The functional reinforcing agent also includes any one or any two of the following: silica micro powder, magnesium oxide, calcium silicate, wollastonite powder, and MQ type silicone resin.

5. The xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: The structure control agent is any one of hydroxyl silicone oil, vinyltriethoxysiloxane, hexamethyldisilazane, and tetramethyldivinyldisilazane, or any combination of two of them in any ratio.

6. The xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: The process aid is any one of aluminum nitride, boron nitride, graphene, and carbon nanotubes, or any combination of two of them in any ratio.

7. The xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: The active heat-resistant additive is cerium oxide; or the active heat-resistant additive is a mixture of any one of titanium dioxide and zinc carbonate with cerium oxide, and the mass content of cerium oxide is ≥40%.

8. The xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: The antifungal agent is any one of silver-based inorganic compound XY-K11, zinc-based inorganic compound XY-K10, organic heterocyclic derivative M-12, or borosilicate, or any combination of two of them.

9. The xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: The vulcanizing agent is any one or any two of benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, dicumyl peroxide, and 2,5-dimethyl-2,5-di-tert-butylperoxide; the linear polysiloxane has a molecular weight of 400,000 to 500,000.

10. The method for preparing a xenon lamp aging resistant silicone rubber material according to claim 1, characterized in that: Includes the following steps: (1) Mixing: Add linear polysiloxane to the internal mixer, then add structure control agent and part of functional reinforcing agent. After mixing at 40-55℃ for 4-8 minutes, add the remaining functional reinforcing agent, process aid, and active heat-resistant additive. After mixing for 4-6 minutes, and the total time of the two mixing sessions should be greater than or equal to 10 minutes; adjust the roller gap, and roll through the sheet 6-8 times to get the sheet. After the sheet is left to stand for 24 hours, put it back into the internal mixer, and add antifungal agent and vulcanizing agent at the same time. After rolling through the sheet 6-8 times, it is cooled to get the mixed sheet. (2) Vulcanization: After the compounded rubber sheet is left to stand for ≥12h, it is hot-melted to obtain reclaimed rubber. The reclaimed rubber is put into a mold and placed on a flat vulcanizing machine for vulcanization to obtain the finished product. The vulcanization time is 8-15min, the vulcanization temperature is 170-190℃, and the vulcanization pressure is 13-15MPa.

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