Luminous addition type liquid silicone rubber and preparation method thereof

Abstract

The invention relates to the technical field of liquid silicone rubber, in particular to luminous addition type liquid silicone rubber and a preparation method thereof, and the luminous addition type liquid silicone rubber is prepared from vinyl silicone oil, hydrogen-containing silicone oil, a Karst catalyst, an alcohol inhibitor, a cross-linking agent, filler, a white carbon black surface treating agent, a long afterglow luminescent material and the like. The silicone rubber comprises a component A and a component B in parts by mass, the component A comprises 100 parts of base rubber and 0.01-5 parts of a platinum catalyst, and the component B comprises 100 parts of base rubber, 0.5-5 parts of a cross-linking agent, 0.01-3 parts of an inhibitor and 5-50 parts of a long-afterglow luminescent material treated by a silane coupling agent. The base rubber comprises 15-40 parts of white carbon black, 30-70 parts of vinyl silicone oil, 2-15 parts of a white carbon black surface treating agent, 10-35 parts of silicon resin and 1-5 parts of water. According to the invention, a specific luminescent material is added, so that the material has a lasting luminescence function after being cured. And the light-emitting addition type liquid silicone rubber can be applied to the fields of light-reflecting vests, safety clothes, safety signs and the like.

Description

Technical Field

[0001] This invention relates to the field of silicone rubber technology, specifically to a light-emitting addition-type liquid silicone rubber and its preparation method. Background Technology

[0002] In the field of personal safety protection, such as reflective vests, workwear, and sportswear, reflective strips are currently mainly sewn on or screen-printed with reflective ink. These reflective materials are usually based on glass microbeads or prism structures and require external light sources to reflect light; they do not emit light themselves. Their warning effect is significantly reduced in dim environments or when the lighting angle is poor.

[0003] Addition-cure liquid silicone rubber is widely used in medical, electronic potting, mold making, and coating printing fields due to its excellent transparency, weather resistance, flexibility, chemical inertness, and lack of byproducts during curing. Adding long-afterglow luminescent materials to liquid silicone rubber for application in the safety protection field is a novel approach. Long-afterglow luminescent materials absorb visible or ultraviolet light, store energy, and slowly release it as light in the dark, achieving long-term self-luminescence. Achieving self-luminescence in liquid silicone rubber through physical mixing of these two materials expands its application range. Currently, combining long-afterglow luminescent materials with silicone rubber faces several technical challenges: 1. Compatibility and dispersibility: Inorganic luminescent powders have poor compatibility with organosilicon polymers and are prone to agglomeration, resulting in uneven dispersion and affecting the luminescence effect and mechanical properties of the material.

[0004] 2. Transparency and Luminous Efficiency: The transparency of silicone rubber directly affects the absorption of light energy by the luminescent material and the subsequent luminous brightness. Uneven dispersion of fillers will reduce the transparency of the system.

[0005] 3. Catalytic poisoning: Addition-type silicone rubber relies on a platinum catalyst for curing. Heavy metals, sulfur, phosphorus, amines, and other substances that may be present in the luminescent material or on its surface can easily poison the platinum catalyst, leading to incomplete curing or even no curing at all.

[0006] Therefore, this invention discloses a luminescent liquid silicone rubber that can uniformly disperse luminescent materials while maintaining the excellent properties of silicone rubber itself, and is mainly used in personal safety protection fields such as reflective vests, work clothes, and sportswear. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a light-emitting addition-type liquid silicone rubber material and its preparation method. This silicone rubber exhibits uniform light emission, high brightness, long afterglow time, good curing performance, and excellent mechanical properties.

[0008] A luminescent addition-type liquid silicone rubber, by mass fraction, comprises component A and component B, wherein component A comprises 100 parts of base rubber and 0.01-5 parts of catalyst; Component B comprises 100 parts of base adhesive, 0.5-5 parts of crosslinking agent, 0.01-3 parts of inhibitor, and 10-100 parts of long afterglow luminescent material treated with silane coupling agent. The base adhesive comprises 15-40 parts of silica, 30-70 parts of vinyl silicone oil, 2-15 parts of silica surface treatment agent, 10-35 parts of silicone resin, and 1-5 parts of water.

[0009] The silica has a specific surface area of ​​100–400 m². 2 / g of hydrophobic fumed silica.

[0010] The vinyl silicone oil is a vinyl-terminated polydimethylsiloxane with a vinyl content of 0.05% to 0.5% (wt) and a viscosity of 1000 to 100000 mPa·s.

[0011] The silica surface treatment agent includes at least one of hexamethyldisilazane, tetramethyldivinylsilazane, methyltrimethoxysilane, dimethyldiethoxysilane, or dimethylvinylethoxysilane.

[0012] The silicone resin is at least one of methyl vinyl MQ silicone resin and methyl phenyl vinyl silicone resin.

[0013] The hydrogen-containing crosslinking agent is a methyl hydrogen-containing polysiloxane with a hydrogen content of 0.1% to 1.6% (wt). The platinum catalyst is one of the following: an olefinic complex of chloroplatinic acid, a Karstedt catalyst, or a platinum-vinylsiloxane complex, and the concentration of the platinum catalyst is 1000–5000 ppm.

[0014] The inhibitor is at least one of ethynylcyclohexanol, tert-butanol, methylbutynol, or tetramethyltetravinylcyclotetrasiloxane.

[0015] The long afterglow luminescent material is SrAl2O4:Eu 2+ ,Dy 3+ Luminescent powder, CaAl2O4:Eu 2+ ,Nd 3+ Luminescent powder, Sr2MgSi2O7:Eu 2+ One type of luminescent powder has an afterglow time of more than 10 hours, and its particle size D50 is preferably 5μm to 50μm.

[0016] The silane coupling agent is at least one of vinyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-aminopropyltriethoxysilane, and γ-(methacryloyloxy)propyltrimethoxysilane. This type of silane coupling agent can avoid platinum catalyst poisoning.

[0017] After modifying the long-afterglow luminescent material with the above-mentioned silane coupling agent, the poisoning of the platinum catalyst caused by the long-afterglow luminescent material is avoided, ensuring that the system can be cured normally. Moreover, the long-afterglow luminescent material can be more uniformly dispersed in liquid silicone rubber, improving the transparency of liquid silicone rubber, thereby improving the luminescence effect and luminescence life of this type of addition-cured liquid silicone rubber and broadening its application range.

[0018] A method for preparing a light-emitting addition-type liquid silicone rubber includes the following steps: Pretreatment of luminescent material: Disperse 10-100 parts of long-afterglow luminescent powder in a mixed solvent of anhydrous ethanol and water. Dilute 1-20 parts of silane coupling agent with ethanol and slowly add it dropwise to the above suspension. Stir at a constant temperature of 50-80℃ for 2-4 hours. Filter, wash, and dry to obtain the surface-modified luminescent material.

[0019] Preparation of base adhesive: Add 20-60 parts of vinyl silicone oil, 2-15 parts of silica surface treatment agent, 2-20 parts of silicone resin, and 1-5 parts of water to a kneader in sequence, stir at room temperature for 1-3 hours, add 15-40 parts of silica in 3 batches, knead evenly, heat at 100-200℃ for 1-5 hours, then add 15-35 parts of vinyl silicone oil in 3 batches, stir evenly, and vacuum treat for 1 hour to obtain the base adhesive.

[0020] Preparation of Component A: Add the platinum catalyst to the base adhesive, stir under vacuum for 1 to 3 hours until the mixture is uniform and the air bubbles are removed, cool to room temperature and discharge to obtain Component A.

[0021] Preparation of Component B: Add the surface-modified long afterglow luminescent material, crosslinking agent, and inhibitor to the base adhesive, and mix under vacuum for 1 to 3 hours until the mixture is uniform and the air bubbles are removed. After cooling to room temperature, discharge the material to obtain Component B.

[0022] When using, mix components A and B evenly, and then apply, pot, or inject. It can be cured by heating at 80℃~120℃ for 1~30 minutes or by leaving it at room temperature for 2~12 hours.

[0023] Beneficial effects of this invention: (1) Solving the problem of catalytic poisoning: Selecting a suitable silane coupling agent to modify the surface of the luminescent material improves its dispersibility and, more importantly, forms a protective film on its surface, effectively isolating the poisoning components that may exist in the powder from contact with the platinum catalyst, ensuring that the system can be cured normally.

[0024] (2) High luminescence performance: High brightness and long afterglow luminescent material were selected, and the liquid adhesive was made with a suitable silane coupling agent to achieve better brightness and longer afterglow duration.

[0025] (3) Maintain the excellent properties of silicone rubber: By adjusting the type of long afterglow luminescent material and silane coupling agent, the superior mechanical properties are maintained.

[0026] (4) Flexible application: By adding long-residual light luminescent materials, liquid silicone rubber achieves a self-luminous effect, which can be used in coating fields such as safety clothing, thus expanding its application range. By adjusting the compatibility between the long-residual light luminescent materials and silane coupling agents, high brightness and long-term luminescence can be achieved while ensuring the basic performance of silicone rubber, meeting the needs of different application scenarios. Detailed Implementation

[0027] The embodiments of the present invention will be described in detail below with reference to the examples. The following examples are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention.

[0028] Comparative Example 1: Preparation of base adhesive: Take 50 parts of vinyl-terminated long-chain polysiloxane with a viscosity of 10000 mPa·s, and 25 parts of a specific surface area of ​​380 m² / s. 2 / g of fumed silica, 2.4 parts of hexamethyldisilazane, 4 parts of vinylphenyl MQ silica with a vinyl content of 2.22%, and 2.1 parts of deionized water are kneaded in a kneader for 1 hour until the material is evenly dispersed. Heating is then turned on, and the mixture is mixed for 1 hour after the material temperature reaches 120°C. After that, vacuum treatment is performed for 1 hour, and the vacuum is turned off and the heating is turned off to obtain the base adhesive.

[0029] Component A: Add 50 parts of base adhesive and 2 parts of 3000 PPM caster catalyst to a planetary mixer and stir under vacuum at -0.1 Pa for 2 hours at a speed of 50 rpm to obtain adhesive A.

[0030] Component B: Add 50 parts of base adhesive and 2 parts of hydrogen-containing silicone oil with a hydrogen content of 0.6-0.8% to a planetary mixer and stir under vacuum at -0.1 Pa for 2 hours at a stirring speed of 50 rpm to obtain adhesive B. Mix component A and component B in a 1:1 mass ratio until homogeneous. After degassing in a degassing machine for 30 minutes, take 70g of the homogeneous mixture and place it into a mold. Cure at 120℃ for 5 minutes to obtain transparent silicone rubber. Perform performance tests on the product.

[0031] Example 1: Treatment of luminescent materials: 50 parts of SrAl2O4:Eu 2+ ,Dy 3+ The luminescent powder was dispersed in a mixed solvent of 100 ml anhydrous ethanol and 10 ml water. One part of vinyltriethoxysilane was diluted with 10 ml ethanol and slowly added dropwise to the above suspension. The mixture was stirred at a constant temperature of 50-80℃ for 2-4 hours, filtered, washed, and dried to obtain the surface-modified luminescent material.

[0032] Preparation of base adhesive: Take 50 parts of vinyl-terminated long-chain polysiloxane with a viscosity of 10000 mPa·s, and 25 parts of a specific surface area of ​​380 m² / s. 2 / g of fumed silica, 2.4 parts of hexamethyldisilazane, 4 parts of vinylphenyl MQ silica with a vinyl content of 2.22%, and 2.1 parts of deionized water are kneaded in a kneader for 1 hour until the material is evenly dispersed. Heating is then turned on, and the mixture is mixed for 1 hour after the material temperature reaches 120°C. After that, vacuum treatment is performed for 1 hour, and the vacuum is turned off and the heating is turned off to obtain the base adhesive.

[0033] Component A: Add 50 parts of base adhesive and 2 parts of 3000 ppm caster catalyst to a planetary mixer and stir under vacuum at -0.1 Pa for 2 hours at a stirring speed of 50 rpm to obtain adhesive A.

[0034] Component B: 50 parts base adhesive, 2 parts hydrogen-containing silicone oil with a hydrogen content of 0.6-0.8%, and 1 part treated SrAl2O4:Eu 2 + , Dy 3+ The luminescent powder was added to a planetary mixer and stirred under vacuum at -0.1 Pa for 2 hours at room temperature with a stirring speed of 50 rpm to obtain slurry B. Mix component A and component B in a 1:1 mass ratio until homogeneous. After degassing in a degassing machine for 30 minutes, take 70g of the homogeneous mixture and place it into a mold. Cure at 120℃ for 5 minutes to obtain transparent silicone rubber. Perform performance tests on the product.

[0035] Example 2: Treatment of luminescent materials: 50 parts of CaAl2O4:Eu 2+ ,Nd 3+The luminescent powder was dispersed in a mixed solvent of 100 ml anhydrous ethanol and 10 ml water. One part of vinyltriethoxysilane was diluted with 10 ml ethanol and slowly added dropwise to the above suspension. The mixture was stirred at a constant temperature of 50-80℃ for 2-4 hours, filtered, washed, and dried to obtain the surface-modified luminescent material.

[0036] Preparation of the base adhesive: Same as in Example 1.

[0037] Component A: Same as in Example 1.

[0038] Component B: 50 parts base adhesive, 1.7 parts hydrogen-containing silicone oil with a hydrogen content of 0.6-0.8%, and 10 parts treated CaAl2O4:Eu 2+ ,Nd 3+ The luminescent powder was added to a planetary mixer and stirred under vacuum at -0.1 Pa for 2 hours at room temperature with a stirring speed of 50 rpm to obtain slurry B. Mix component A and component B in a 1:1 mass ratio until homogeneous. After degassing in a degassing machine for 30 minutes, take 70g of the homogeneous mixture and place it into a mold. Cure at 100℃ for 10 minutes to obtain transparent silicone rubber. Perform performance tests on the product.

[0039] Example 3: Treatment of luminescent materials: 50 parts of Sr2MgSi2O7:Eu 2+ The luminescent powder was dispersed in a mixed solvent of 100 ml anhydrous ethanol and 10 ml water. One part of vinyltriethoxysilane was diluted with 10 ml ethanol and slowly added dropwise to the above suspension. The mixture was stirred at a constant temperature of 50-80℃ for 2-4 hours, filtered, washed, and dried to obtain the surface-modified luminescent material.

[0040] Preparation of the base adhesive: Same as in Example 1.

[0041] Component A: Same as in Example 1.

[0042] Component B: 50 parts base adhesive, 1.5 parts hydrogen-containing silicone oil with a hydrogen content of 0.6-0.8%, and 20 parts treated Sr2MgSi2O7:Eu 2+ The luminescent powder was added to a planetary mixer and stirred under vacuum at -0.1 Pa for 2 hours at room temperature with a stirring speed of 50 rpm to obtain slurry B. Mix component A and component B in a 1:1 mass ratio until homogeneous. After degassing in a degassing machine for 30 minutes, take 70g of the homogeneous mixture and place it into a mold. Cure at 100℃ for 10 minutes to obtain transparent silicone rubber. Perform performance tests on the product.

[0043] Example 4: Treatment of luminescent materials: 50 parts of CaAl2O4:Eu 2+,Nd 3+ The luminescent powder was dispersed in a mixed solvent of 100 ml anhydrous ethanol and 10 ml water. Five parts of vinyltriethoxysilane were diluted with 10 ml ethanol and slowly added dropwise to the suspension. The mixture was stirred at a constant temperature of 50-80°C for 2-4 hours, filtered, washed, and dried to obtain the surface-modified luminescent material.

[0044] Preparation of the base adhesive: Same as in Example 1.

[0045] Component A: Same as in Example 1.

[0046] Component B: 50 parts base adhesive, 1.5 parts hydrogen-containing silicone oil with a hydrogen content of 0.6-0.8%, and 10 parts treated CaAl2O4:Eu 2+ ,Nd 3+ The luminescent powder was added to a planetary mixer and stirred under vacuum at -0.1 Pa for 2 hours at room temperature with a stirring speed of 50 rpm to obtain slurry B. Mix component A and component B in a 1:1 mass ratio until homogeneous. After degassing in a degassing machine for 30 minutes, take 70g of the homogeneous mixture and place it into a mold. Cure at 100℃ for 10 minutes to obtain transparent silicone rubber. Perform performance tests on the product.

[0047] Example 5: Treatment of luminescent materials: 50 parts of CaAl2O4:Eu 2+ ,Nd 3+ The luminescent powder was dispersed in a mixed solvent of 100 ml anhydrous ethanol and 10 ml water. Ten parts of γ-aminopropyltriethoxysilane were diluted with 10 ml ethanol and slowly added dropwise to the above suspension. The mixture was stirred at a constant temperature of 50-80℃ for 2-4 hours, filtered, washed, and dried to obtain the surface-modified luminescent material.

[0048] Preparation of the base adhesive: Same as in Example 1.

[0049] Component A: Same as in Example 1.

[0050] Component B: 50 parts base adhesive, 2 parts hydrogen-containing silicone oil with a hydrogen content of 0.6-0.8%, and 10 parts treated CaAl2O4:Eu 2+ , Nd 3+ Blue luminescent powder was added to a planetary mixer and stirred under vacuum at -0.1 Pa for 2 hours at room temperature with a stirring speed of 50 rpm to obtain slurry B. Mix component A and component B in a 1:1 mass ratio until homogeneous. After degassing in a degassing machine for 30 minutes, take 70g of the homogeneous mixture and place it into a mold. Cure at 120℃ for 5 minutes to obtain transparent silicone rubber. Perform performance tests on the product.

[0051] Example 6: Treatment of luminescent materials: 50 parts of CaAl2O4:Eu 2+ ,Nd 3+ The luminescent powder was dispersed in a mixed solvent of 100 ml anhydrous ethanol and 10 ml water. 15 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were diluted with 10 ml ethanol and slowly added dropwise to the above suspension. The mixture was stirred at a constant temperature of 50-80℃ for 2-4 hours, filtered, washed, and dried to obtain the surface-modified luminescent material.

[0052] Preparation of the base adhesive: Same as in Example 1.

[0053] Component A: Same as in Example 1.

[0054] Component B: 50 parts base adhesive, 2 parts hydrogen-containing silicone oil with a hydrogen content of 0.6-0.8%, and 10 parts treated CaAl2O4:Eu 2 + ,Nd 3+ The luminescent powder was added to a planetary mixer and stirred under vacuum at -0.1 Pa for 2 hours at room temperature with a stirring speed of 50 rpm to obtain slurry B. Mix component A and component B in a 1:1 mass ratio until homogeneous. After degassing in a degassing machine for 30 minutes, take 70g of the homogeneous mixture and place it into a mold. Cure at 120℃ for 5 minutes to obtain transparent silicone rubber. Perform performance tests on the product.

[0055] Comparative Example 2: This comparative example is based on Example 1, but does not use the luminescent material SrAl2O4:Eu. 2+ , Dy 3+ The process was carried out, with the remaining formulation components and preparation method being the same as in Example 1. After mixing, the viscosity of the system increased sharply, making degassing difficult. Even after adding the catalyst, it could not be completely cured within 24 hours, resulting in a sticky surface.

[0056] For both the examples and comparative examples, the base rubber was prepared separately first, followed by the preparation of components A and B. Components A and B were then uniformly mixed in a 1:1 weight ratio and vulcanized at 120°C for 5 minutes to obtain a transparent silicone rubber. The silicone rubber elastomer was tested using the following methods: Luminous brightness: After the liquid adhesive was left to stand in a dark room for 24 hours to remove gloss, it was irradiated under a D65 light source for 20 minutes, and the initial brightness was tested using a CS-200 colorimeter. Afterglow time: Brightness decays to 0.3 Cd / m² 2 Time; Shore A hardness: GB / T2794-2013; Tensile strength: GB / T531-1999; Elongation at break: GB / T528-2009; Tear strength: GB / T529-2008; The performance of a self-luminous addition-type liquid silicone rubber prepared in the examples and comparative examples was tested, and the results are shown in the table below:

[0057] The performance test results show that the self-luminous liquid silicone rubber material prepared in this application can meet the luminescence requirements, and the luminescence brightness of the prototype samples is greater than 5 Cd / m². 2 The afterglow time is over 10 hours, and the brightness and afterglow time meet the requirements for nighttime warning. In addition, the mechanical properties are maintained at a high level, which can meet the strength requirements of materials in applications.

[0058] The test results from Examples 1-3 show that different types of doped luminescent materials have a certain impact on the luminescence intensity of the liquid adhesive. The higher the compatibility of the doped luminescent material, the greater the initial brightness. The most suitable doped luminescent material is CaAl2O4:Eu. 2+ ,Nd 3+ Luminescent powder.

[0059] The test results from Examples 4-6 show that, with the same doping of the most suitable luminescent material CaAl2O4:Eu, 2+ ,Nd 3+ Under luminescent conditions, the type of silane coupling agent has a significant impact on the performance of this novel self-luminous liquid silicone rubber material. Different types of silane coupling agents have a certain influence on the luminescence intensity of the liquid adhesive. As the compatibility of the silane coupling agent increases, the initial brightness gradually increases. Among them, vinyltriethoxysilane is the most suitable silane coupling agent.

[0060] Comparative Example 2 shows that the lack of pretreatment of the luminescent material in Comparative Example 2 resulted in a sharp increase in the viscosity of the system after mixing the liquid adhesive, making it difficult to degas. Even after adding the catalyst, it could not be completely cured within 24 hours, and the surface became sticky. Example 3, on the other hand, pretreated the luminescent material, which could avoid catalyst poisoning caused by the luminescent material and ensure that the liquid adhesive could be cured normally.

Claims

1. A light-emitting addition-type liquid silicone rubber, characterized in that, Based on mass fraction, it includes component A and component B; Component A comprises 100 parts of base adhesive and 0.01-5 parts of catalyst; Component B comprises 100 parts of base adhesive, 0.5-5 parts of crosslinking agent, 0.01-3 parts of inhibitor, and 5-50 parts of long afterglow luminescent material treated with silane coupling agent; The base adhesive comprises 15-40 parts of silica, 30-70 parts of vinyl silicone oil, 2-15 parts of silica surface treatment agent, 10-35 parts of silicone resin, and 1-5 parts of water.

2. The luminescent addition-type liquid silicone rubber according to claim 1, characterized in that, The silica has a specific surface area of ​​100–400 m². 2 / g of hydrophobic fumed silica.

3. The luminescent addition-type liquid silicone rubber according to claim 1, characterized in that, The vinyl silicone oil is a vinyl-terminated polydimethylsiloxane with a vinyl content of 0.05% to 0.5% (wt) and a viscosity of 1000 to 100000 mPa·s.

4. The luminescent addition-type liquid silicone rubber according to claim 1, characterized in that, The silica surface treatment agent includes at least one of hexamethyldisilazane, tetramethyldivinylsilazane, methyltrimethoxysilane, dimethyldiethoxysilane, or dimethylvinylethoxysilane.

5. The luminescent addition-type liquid silicone rubber according to claim 1, characterized in that, The silicone resin is at least one of methyl vinyl MQ silicone resin and methyl phenyl vinyl silicone resin, and the hydrogen-containing crosslinking agent is methyl hydrogen-containing polysiloxane with a hydrogen content of 0.1% to 1.6% (wt).

6. The luminescent addition-type liquid silicone rubber according to claim 1, characterized in that, The platinum catalyst is one of the following: an olefinic complex of chloroplatinic acid, a Karstedt catalyst, or a platinum-vinylsiloxane complex, and the concentration of the platinum catalyst is 1000–5000 ppm.

7. The luminescent addition-type liquid silicone rubber according to claim 1, characterized in that, The inhibitor is at least one of ethynylcyclohexanol, tert-butanol, methylbutynol, or tetramethyltetravinylcyclotetrasiloxane.

8. The luminescent addition-type liquid silicone rubber according to claim 1, characterized in that, The long afterglow luminescent material is SrAl2O4:Eu 2+ ,Dy 3+ Luminescent powder, CaAl2O4:Eu 2+ ,Nd 3+ Luminescent powder, Sr2MgSi2O7:Eu 2+ ,Nd 3+ The luminescent powder is at least one of alkaline earth aluminates or silicates; the silane coupling agent is at least one of vinyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-aminopropyltriethoxysilane, and γ-(methacryloyloxy)propyltrimethoxysilane.

9. A method for preparing a light-emitting addition-type liquid silicone rubber, characterized in that, Includes the following steps: S1. Pretreatment of luminescent material: Disperse the long-lasting luminescent powder in a mixed solvent of anhydrous ethanol and water. Dilute the silane coupling agent with ethanol and slowly add it dropwise to the above suspension. Stir at a constant temperature of 50-80℃ for 2-4 hours. Filter, wash, and dry to obtain the surface-modified luminescent material; S2. Preparation of base adhesive: According to the formula, vinyl silicone oil, silica, silica surface treatment agent, silicone resin, and deionized water are added to a kneader in sequence, stirred at room temperature for 1-3 hours, then heated at 100-200℃ for 1-5 hours, then stirred evenly and vacuum treated; S3. Preparation of Component A: Mix the base adhesive and catalyst from step S1 evenly according to the proportion; S4. Preparation of Component B: Mix the base adhesive, crosslinking agent, modified luminescent material, and inhibitor from step S1 evenly according to the specified proportions; S5. Mix components A and B obtained in steps S3 and S4 thoroughly and uniformly, and treat at 80-120℃ for 1-30 minutes to obtain luminescent addition-type liquid silicone rubber.

10. The method for preparing addition-cure liquid silicone rubber according to claim 9, characterized in that, The preparation of components A and B is carried out in a planetary stirrer.

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