Formula and preparation method of ethanol-removed room-temperature-cured organic silica gel

Abstract

The invention discloses a formula and a preparation method of ethanol-removed room-temperature-cured organic silica gel, the formula comprises a silicone rubber matrix, a cross-linking agent, a catalyst, a composite heat-conducting agent, a composite flame retardant and other auxiliaries, the preparation method comprises the following steps: step 1, preparing the composite heat-conducting agent; 2, preparing a composite flame retardant; step 3, silicone rubber matrix mixing; step 4, adding an auxiliary agent; 5, blending a cross-linking system; according to the composite flame retardant disclosed by the invention, the flame-retardant filler is coated with the microcapsule wall material monomer, and the composite heat-conducting agent adopts the surface modifier to perform surface modification on the heat-conducting filler, so that the compatibility of a silicone rubber matrix with the flame-retardant filler and the heat-conducting filler is improved, and the mechanical property of a silicone rubber elastomer is prevented from becoming poor; the flame-retardant filler is prepared by compounding a plurality of intumescent flame retardants and flame-retardant synergists, the heat-conducting filler is prepared by compounding a micron-sized skeleton filler and a nano-sized bridging filler, and the flame-retardant and heat-conducting properties of the silicone rubber elastomer can be improved through the synergistic effect of a plurality of flame-retardant and heat-conducting components.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical industry, in particular to a formula and a preparation method of a deethanol-type room temperature curing organic silica gel. Background Art

[0002] Deethanol-type thermal conductive silicone undergoes a hydrolysis-condensation reaction with moisture in the air, releasing ethanol and then cross-linking and curing into a high-performance elastomer. It is suitable for sealing and bonding electronic components. For example, in the LED field, it is used for bonding and packaging heat dissipation substrates of high-power LED lamps, and in the industrial electronics field, it is used for thermal sealing and structural fixation of heat-generating components such as power modules and transformers. However, the existing deethanol-type thermally conductive silicone rubber still has the following disadvantages when used: 1. The existing technology generally improves the thermal conductivity by filling thermally conductive fillers. In order to meet the heat dissipation needs of electronic equipment, it is often necessary to increase the filling amount of fillers, which leads to the obstruction of the movement of silicone rubber molecular chains, and problems such as a surge in hardness and a sudden drop in elongation, and the loss of its original buffering and vibration reduction function; 2. Silicone rubber is a flammable material. When burned, it not only releases a large amount of heat, but also has the risk of secondary disasters caused by molten droplets, which seriously limits its scope of application. Some technologies improve the flame retardant performance by adding flame retardant fillers, but a high filling amount of flame retardant fillers will aggravate the agglomeration of fillers, destroy the network structure of silicone rubber, and cause a decrease in tensile strength; 3. The thermal conductive fillers and flame retardant fillers used in the existing technology have a single composition, so the effect is poor in actual application and can no longer meet the needs. Summary of the Invention

[0003] The object of the present invention is to provide a formula and preparation method of a deethanol-type room temperature curing organic silica gel to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a formula of a deethanol-type room-temperature curing organic silica gel, which includes: a silicone rubber matrix, a cross-linking agent, a catalyst, a composite thermal conductor, a composite flame retardant and other additives, and the mass percentage content of each component is: 56-76% of silicone rubber matrix, 1-5% of cross-linking agent, 0.1-0.5% of catalyst, 15-25% of composite thermal conductor, 7-13% of composite flame retardant and 0.5-2% of other additives.

[0005] Preferably, the mass percentages of the components are: 66% silicone rubber matrix, 3% cross-linking agent, 0.2% catalyst, 20% composite thermal conductor, 10% composite flame retardant and 0.8% other additives.

[0006] Preferably, the silicone rubber matrix is hydroxy-terminated polydimethylsiloxane, the crosslinking agent is vinyl triacetoxysilane, the catalyst is one of organic titanate and organic zirconate, and other additives are dispersant, thixotropic agent and stabilizer with a mass ratio of 1:1:3, the dispersant is dimethyl silicone oil, the thixotropic agent is fumed silica, and the stabilizer is acetylacetone.

[0007] Preferably, the formula of the composite thermal conductor includes: a surface modifier, a micron-sized skeleton filler and a nano-sized bridging filler, and the mass percentage content of each component is: 3% surface modifier, 70% micron-sized skeleton filler and 27% nano-sized bridging filler, the micron-sized skeleton filler adopts one or a combination of spherical alumina with a particle size of 5-20 μm and flaky boron nitride with a particle size of 10-30 μm, the nano-sized bridging filler adopts one of nano-alumina with a particle size of 50-100 nm and nano-boron nitride with a particle size of 20-50 nm, and the surface modifier adopts a silane coupling agent.

[0008] Preferably, the formula of the composite flame retardant includes: a microcapsule wall material monomer, an intumescent flame retardant and a flame retardant synergist, and the mass percentages of each component are: 5% of the microcapsule wall material monomer, 85% of the intumescent flame retardant and 10% of the flame retardant synergist, the microcapsule wall material monomer is one of melamine-formaldehyde resin and polymethyl methacrylate, the intumescent flame retardant is one or a combination of two of melamine polyphosphate and ammonium polyphosphate, and the flame retardant synergist is one or more combinations of zinc borate, organic montmorillonite and ZIF-67.

[0009] A method for preparing a deethanol-type room temperature curing organic silica gel, comprising the steps of: preparing a composite thermal conductor; preparing a composite flame retardant; mixing a silicone rubber matrix; adding an auxiliary agent; and preparing a cross-linking system.

[0010] In the above step 1, a surface modifier, a micron-sized skeleton filler, and a nano-sized bridging filler are prepared according to the formula of the composite thermal conductive agent, with the sum of the mass percentages of each component being 1. The micron-sized skeleton filler is added to a high-speed mixer, the temperature is raised to 80° C., the surface modifier is slowly added dropwise while stirring, the mixture is stirred at a stirring speed of 400 rpm for 30 minutes, the nano-sized bridging filler is added, stirring is continued for 15 minutes, and the mixture is cooled to room temperature to obtain a composite thermal conductive agent.

[0011] In the above step 2, based on the sum of the mass percentages of each component being 1, a microcapsule wall material monomer, an intumescent flame retardant, and a flame retardant synergist are prepared according to the formula of the composite flame retardant, the intumescent flame retardant and the flame retardant synergist are premixed, the mixture is placed in deionized water, ultrasonically dispersed for 30 minutes, the microcapsule wall material monomer is added dropwise, the temperature is raised to 70° C., the mixture is stirred for reaction for 2 hours, and the composite flame retardant is obtained after filtration, washing, and vacuum drying;

[0012] Wherein, in the above step 3, the sum of the mass percentages of each component is taken as 1, and a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant and other additives are prepared according to the formula of organic silica gel, the silicone rubber matrix is placed in a blender, vacuum degassed for 15 minutes, and the composite thermal conductor and the composite flame retardant are added in three portions, stirring at a stirring speed of 200 rpm for 10 minutes after each addition, and then stirring at a stirring speed of 1000 rpm for 20 minutes to obtain a mixed silicone rubber matrix;

[0013] In the above step 4, other additives are added to the mixed silicone rubber matrix and stirring is continued for 30 minutes;

[0014] In the above step 5, the crosslinking agent is added to the mixed silicone rubber matrix under stirring conditions, stirred for 10 minutes, and then the catalyst solution is added, stirred for 5 minutes, and vacuum degassing is carried out for 30 minutes to obtain the product.

[0015] Preferably, in step 1, the composite thermal conductor needs to be passed through a 100-mesh sieve to remove agglomerates.

[0016] Preferably, in step 2, the mass ratio of the mixture to deionized water is 3:7.

[0017] Preferably, in step 2, the composite flame retardant needs to be crushed to a particle size of 10 μm.

[0018] Preferably, in step five, the catalyst solution is prepared by dissolving the catalyst in anhydrous ethanol to prepare a catalyst solution with a concentration of 5%.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the composite flame retardant of the present invention uses a microcapsule wall material monomer to coat the flame retardant filler, and the composite thermal conductive agent uses a surface modifier to perform surface modification on the thermal conductive filler, thereby improving the compatibility of the silicone rubber matrix with the flame retardant filler and the thermal conductive filler, avoiding the deterioration of the mechanical properties of the silicone rubber elastomer, the flame retardant filler is compounded with a variety of intumescent flame retardants and flame retardant synergists, and the thermal conductive filler is compounded with a micron-level skeleton filler and a nano-level bridging filler. Through the synergistic effect of multiple flame retardant and thermal conductive components, the flame retardant and thermal conductive properties of the silicone rubber elastomer can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Please see the attached Figure 1 , a technical solution provided by the present invention:

[0023] Example 1:

[0024] A formula for a deethanol-type room-temperature curing organic silica gel, comprising: a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant, and other additives, wherein the mass percentage content of each component is: 66% silicone rubber matrix, 3% crosslinking agent, 0.2% catalyst, 20% composite thermal conductor, 10% composite flame retardant, and 0.8% other additives; the silicone rubber matrix is hydroxy-terminated polydimethylsiloxane, the crosslinking agent is vinyl triacetoxysilane, the catalyst is organic titanate, and the other additives are a dispersant, a thixotropic agent, and a stabilizer in a mass ratio of 1:1:3, wherein the dispersant is dimethyl silicone oil, the thixotropic agent is fumed silica, and the stabilizer is acetylacetone; the formula of the composite thermal conductor comprises: a surface modifier, a micron-sized skeleton filler, and a nano-sized bridging filler, wherein the mass percentage content of each component is: 3% surface modifier, 70% micron-sized skeleton filler, and 1% hydroxyl-terminated polydimethylsiloxane. and 27% nano-scale bridging filler, the micron-scale skeleton filler uses spherical alumina with a particle size of 5-20μm and flake boron nitride with a particle size of 10-30μm, and the mass ratio of spherical alumina to flake boron nitride is 1:1, the nano-scale bridging filler uses nano-alumina with a particle size of 50-100nm, and the surface modifier uses a silane coupling agent; the formula of the composite flame retardant includes: microcapsule wall material monomer, intumescent flame retardant and flame retardant synergist The mass percentage content of each component is: 5% microcapsule wall material monomer, 85% intumescent flame retardant and 10% flame retardant synergist, the microcapsule wall material monomer is melamine-formaldehyde resin, the intumescent flame retardant is melamine polyphosphate and ammonium polyphosphate, and the mass ratio of melamine polyphosphate to ammonium polyphosphate is 1:1, and the flame retardant synergist is zinc borate and ZIF-67, and the mass ratio of zinc borate to ZIF-67 is 1:1.

[0025] A method for preparing a deethanol-type room temperature curing organic silica gel, comprising the steps of: preparing a composite thermal conductor; preparing a composite flame retardant; mixing a silicone rubber matrix; adding an auxiliary agent; and preparing a cross-linking system.

[0026] In the above step 1, a surface modifier, a micron-scale skeleton filler, and a nano-scale bridging filler are prepared according to the formula of the composite thermal conductive agent, with the sum of the mass percentages of each component being 1. The micron-scale skeleton filler is added to a high-speed mixer, the temperature is raised to 80° C., the surface modifier is slowly added dropwise while stirring, and the mixture is stirred at a stirring speed of 400 rpm for 30 minutes. The nano-scale bridging filler is added and stirring is continued for 15 minutes. The mixture is cooled to room temperature and passed through a 100-mesh sieve to remove agglomerates to obtain a composite thermal conductive agent.

[0027] In the above step 2, based on the sum of the mass percentages of each component being 1, a microcapsule wall material monomer, an intumescent flame retardant, and a flame retardant synergist are prepared according to the formula of the composite flame retardant, the intumescent flame retardant and the flame retardant synergist are premixed, the mixture is placed in deionized water at a mass ratio of 3:7, ultrasonically dispersed for 30 minutes, the microcapsule wall material monomer is added dropwise, the temperature is raised to 70° C., the reaction is stirred for 2 hours, and after filtering, washing, vacuum drying, and pulverization, a composite flame retardant with a particle size of 10 μm is obtained;

[0028] Wherein, in the above step 3, the sum of the mass percentages of each component is taken as 1, and a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant and other additives are prepared according to the formula of organic silica gel, the silicone rubber matrix is placed in a blender, vacuum degassed for 15 minutes, and the composite thermal conductor and the composite flame retardant are added in three portions, stirring at a stirring speed of 200 rpm for 10 minutes after each addition, and then stirring at a stirring speed of 1000 rpm for 20 minutes to obtain a mixed silicone rubber matrix;

[0029] In the above step 4, other additives are added to the mixed silicone rubber matrix and stirring is continued for 30 minutes;

[0030] In the above step 5, the catalyst is dissolved in anhydrous ethanol to prepare a catalyst solution with a concentration of 5%. Under stirring conditions, the crosslinking agent is added to the mixed silicone rubber matrix, stirred for 10 minutes, and then the catalyst solution is added, stirring is continued for 5 minutes, and vacuum degassing is carried out for 30 minutes to obtain the product.

[0031] Example 2:

[0032] A formula for a deethanol-type room-temperature curing organic silica gel, comprising: a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant, and other additives, wherein the mass percentage content of each component is: 56% silicone rubber matrix, 5% crosslinking agent, 0.2% catalyst, 25% composite thermal conductor, 13% composite flame retardant, and 0.8% other additives; the silicone rubber matrix is hydroxy-terminated polydimethylsiloxane, the crosslinking agent is vinyl triacetoxysilane, the catalyst is organic titanate, and the other additives are a dispersant, a thixotropic agent, and a stabilizer in a mass ratio of 1:1:3, wherein the dispersant is dimethyl silicone oil, the thixotropic agent is fumed silica, and the stabilizer is acetylacetone; the formula of the composite thermal conductor comprises: a surface modifier, a micron-sized skeleton filler, and a nano-sized bridging filler, wherein the mass percentage content of each component is: 3% surface modifier, 70% micron-sized skeleton filler, and 1% hydroxyl-terminated polydimethylsiloxane. and 27% nano-scale bridging filler, the micron-scale skeleton filler uses spherical alumina with a particle size of 5-20μm and flake boron nitride with a particle size of 10-30μm, and the mass ratio of spherical alumina to flake boron nitride is 1:1, the nano-scale bridging filler uses nano-alumina with a particle size of 50-100nm, and the surface modifier uses a silane coupling agent; the formula of the composite flame retardant includes: microcapsule wall material monomer, intumescent flame retardant and flame retardant synergist The mass percentage content of each component is: 5% microcapsule wall material monomer, 85% intumescent flame retardant and 10% flame retardant synergist, the microcapsule wall material monomer is melamine-formaldehyde resin, the intumescent flame retardant is melamine polyphosphate and ammonium polyphosphate, and the mass ratio of melamine polyphosphate to ammonium polyphosphate is 1:1, and the flame retardant synergist is zinc borate and ZIF-67, and the mass ratio of zinc borate to ZIF-67 is 1:1.

[0033] A method for preparing a deethanol-type room temperature curing organic silica gel, comprising the steps of: preparing a composite thermal conductor; preparing a composite flame retardant; mixing a silicone rubber matrix; adding an auxiliary agent; and preparing a cross-linking system.

[0034] In the above step 1, a surface modifier, a micron-scale skeleton filler, and a nano-scale bridging filler are prepared according to the formula of the composite thermal conductive agent, with the sum of the mass percentages of each component being 1. The micron-scale skeleton filler is added to a high-speed mixer, the temperature is raised to 80° C., the surface modifier is slowly added dropwise while stirring, and the mixture is stirred at a stirring speed of 400 rpm for 30 minutes. The nano-scale bridging filler is added and stirring is continued for 15 minutes. The mixture is cooled to room temperature and passed through a 100-mesh sieve to remove agglomerates to obtain a composite thermal conductive agent.

[0035] In the above step 2, based on the sum of the mass percentages of each component being 1, a microcapsule wall material monomer, an intumescent flame retardant, and a flame retardant synergist are prepared according to the formula of the composite flame retardant, the intumescent flame retardant and the flame retardant synergist are premixed, the mixture is placed in deionized water at a mass ratio of 3:7, ultrasonically dispersed for 30 minutes, the microcapsule wall material monomer is added dropwise, the temperature is raised to 70° C., the reaction is stirred for 2 hours, and after filtering, washing, vacuum drying, and pulverization, a composite flame retardant with a particle size of 10 μm is obtained;

[0036] Wherein, in the above step 3, the sum of the mass percentages of each component is taken as 1, and a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant and other additives are prepared according to the formula of organic silica gel, the silicone rubber matrix is placed in a blender, vacuum degassed for 15 minutes, and the composite thermal conductor and the composite flame retardant are added in three portions, stirring at a stirring speed of 200 rpm for 10 minutes after each addition, and then stirring at a stirring speed of 1000 rpm for 20 minutes to obtain a mixed silicone rubber matrix;

[0037] In the above step 4, other additives are added to the mixed silicone rubber matrix and stirring is continued for 30 minutes;

[0038] In the above step 5, the catalyst is dissolved in anhydrous ethanol to prepare a catalyst solution with a concentration of 5%. Under stirring conditions, the crosslinking agent is added to the mixed silicone rubber matrix, stirred for 10 minutes, and then the catalyst solution is added, stirring is continued for 5 minutes, and vacuum degassing is carried out for 30 minutes to obtain the product.

[0039] Example 3:

[0040] A formula for a deethanol-type room-temperature curing organic silica gel, comprising: a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant and other additives, wherein the mass percentage content of each component is: 76% of the silicone rubber matrix, 1% of the crosslinking agent, 0.2% of the catalyst, 15% of the composite thermal conductor, 7% of the composite flame retardant and 0.8% of other additives; the silicone rubber matrix is hydroxy-terminated polydimethylsiloxane, the crosslinking agent is vinyl triacetoxysilane, the catalyst is organic titanate, and the other additives are a dispersant, a thixotropic agent and a stabilizer with a mass ratio of 1:1:3, wherein the dispersant is dimethyl silicone oil, the thixotropic agent is fumed silica, and the stabilizer is acetylacetone; the formula of the composite thermal conductor comprises: a surface modifier, a micron-sized skeleton filler and a nano-sized bridging filler, wherein the mass percentage content of each component is: 3% of the surface modifier, 70% of the micron-sized skeleton filler and The invention discloses a composite flame retardant comprising a micron-sized bridging filler and a micron-sized skeleton filler, wherein the micron-sized bridging filler comprises spherical alumina with a particle size of 5-20 μm and flaky boron nitride with a particle size of 10-30 μm, and the mass ratio of the spherical alumina to the flaky boron nitride is 1:1. The nano-sized bridging filler comprises nano-alumina with a particle size of 50-100 nm, and the surface modifier comprises a silane coupling agent. The composite flame retardant comprises a microcapsule wall material monomer, an intumescent flame retardant, and a flame retardant synergist, and the mass percentages of the components are 5% of the microcapsule wall material monomer, 85% of the intumescent flame retardant, and 10% of the flame retardant synergist. The microcapsule wall material monomer is melamine-formaldehyde resin, the intumescent flame retardant is melamine polyphosphate and ammonium polyphosphate, and the mass ratio of the melamine polyphosphate to the ammonium polyphosphate is 1:1. The flame retardant synergist comprises zinc borate and ZIF-67, and the mass ratio of the zinc borate to ZIF-67 is 1:1.

[0041] A method for preparing a deethanol-type room temperature curing organic silica gel, comprising the steps of: preparing a composite thermal conductor; preparing a composite flame retardant; mixing a silicone rubber matrix; adding an auxiliary agent; and preparing a cross-linking system.

[0042] In the above step 1, a surface modifier, a micron-scale skeleton filler, and a nano-scale bridging filler are prepared according to the formula of the composite thermal conductive agent, with the sum of the mass percentages of each component being 1. The micron-scale skeleton filler is added to a high-speed mixer, the temperature is raised to 80° C., the surface modifier is slowly added dropwise while stirring, and the mixture is stirred at a stirring speed of 400 rpm for 30 minutes. The nano-scale bridging filler is added and stirring is continued for 15 minutes. The mixture is cooled to room temperature and passed through a 100-mesh sieve to remove agglomerates to obtain a composite thermal conductive agent.

[0043] In the above step 2, based on the sum of the mass percentages of each component being 1, a microcapsule wall material monomer, an intumescent flame retardant, and a flame retardant synergist are prepared according to the formula of the composite flame retardant, the intumescent flame retardant and the flame retardant synergist are premixed, the mixture is placed in deionized water at a mass ratio of 3:7, ultrasonically dispersed for 30 minutes, the microcapsule wall material monomer is added dropwise, the temperature is raised to 70° C., the reaction is stirred for 2 hours, and after filtering, washing, vacuum drying, and pulverization, a composite flame retardant with a particle size of 10 μm is obtained;

[0044] Wherein, in the above step 3, the sum of the mass percentages of each component is taken as 1, and a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant and other additives are prepared according to the formula of organic silica gel, the silicone rubber matrix is placed in a blender, vacuum degassed for 15 minutes, and the composite thermal conductor and the composite flame retardant are added in three portions, stirring at a stirring speed of 200 rpm for 10 minutes after each addition, and then stirring at a stirring speed of 1000 rpm for 20 minutes to obtain a mixed silicone rubber matrix;

[0045] In the above step 4, other additives are added to the mixed silicone rubber matrix and stirring is continued for 30 minutes;

[0046] In the above step 5, the catalyst is dissolved in anhydrous ethanol to prepare a catalyst solution with a concentration of 5%. Under stirring conditions, the crosslinking agent is added to the mixed silicone rubber matrix, stirred for 10 minutes, and then the catalyst solution is added, stirring is continued for 5 minutes, and vacuum degassing is carried out for 30 minutes to obtain the product.

[0047] The properties of each embodiment are compared in the following table:

[0048]

[0049]

[0050] Based on the above, the composite flame retardant of the present invention uses a microcapsule wall material monomer to microencapsulate the flame retardant filler. The flame retardant filler coated with the microcapsule has good compatibility with silicone rubber under normal conditions, and can also avoid the problem of migration and seepage of the flame retardant filler. The flame retardant filler is compounded with a variety of intumescent flame retardants and flame retardant synergists. The synergistic effect of the intumescent flame retardant and the flame retardant synergist can reduce the overall amount of the composite flame retardant while ensuring the flame retardant properties of the silicone rubber elastomer. The composite thermal conductive agent uses a surface modifier to perform surface modification on the thermal conductive filler, thereby improving the compatibility between the silicone rubber matrix and the thermal conductive filler. The thermal conductive filler is compounded with a micron-scale skeleton filler and a nano-scale bridging filler. The micron-scale skeleton filler can reduce the restriction on the movement of the silicone rubber molecular chain, and the nano-scale bridging filler can fill the gaps between the micron particles, reduce the interfacial thermal resistance, and thus enhance the thermal conductivity of the silicone rubber elastomer.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A formula of a deethanol-type room temperature curing organic silica gel, the formula comprising: The invention relates to a silicone rubber matrix, a cross-linking agent, a catalyst, a composite thermal conductive agent, a composite flame retardant and other additives, wherein the mass percentage content of each component is: 56-76% of silicone rubber matrix, 1-5% of cross-linking agent, 0.1-0.5% of catalyst, 15-25% of composite thermal conductive agent, 7-13% of composite flame retardant and 0.5-2% of other additives.

2. The formula of the deethanol-type room temperature curing organic silica gel according to claim 1, characterized in that: The mass percentage contents of the components are: 66% of silicone rubber matrix, 3% of cross-linking agent, 0.2% of catalyst, 20% of composite thermal conductive agent, 10% of composite flame retardant and 0.8% of other additives.

3. The formula of the deethanol-type room temperature curing organic silica gel according to claim 1, characterized in that: The silicone rubber matrix is hydroxy-terminated polydimethylsiloxane, the crosslinking agent is vinyl triacetoxysilane, the catalyst is one of organic titanate and organic zirconate, and other additives are dispersant, thixotropic agent and stabilizer with a mass ratio of 1:1:3, the dispersant is dimethyl silicone oil, the thixotropic agent is fumed silica, and the stabilizer is acetylacetone.

4. The formula of the deethanol-type room temperature curing organic silica gel according to claim 1, characterized in that: The formula of the composite thermal conductor includes: a surface modifier, a micron-sized skeleton filler and a nano-sized bridging filler, wherein the mass percentage content of each component is: 3% of the surface modifier, 70% of the micron-sized skeleton filler and 27% of the nano-sized bridging filler. The micron-sized skeleton filler is one or a combination of spherical alumina with a particle size of 5-20 μm and flaky boron nitride with a particle size of 10-30 μm. The nano-sized bridging filler is one of nano-alumina with a particle size of 50-100 nm and nano-boron nitride with a particle size of 20-50 nm. The surface modifier is a silane coupling agent.

5. The formula of the deethanol-type room temperature curing organic silica gel according to claim 1, characterized in that: The composite flame retardant comprises a microcapsule wall material monomer, an intumescent flame retardant, and a flame retardant synergist. The mass percentages of the components are 5% of the microcapsule wall material monomer, 85% of the intumescent flame retardant, and 10% of the flame retardant synergist. The microcapsule wall material monomer is one of melamine-formaldehyde resin and polymethyl methacrylate, the intumescent flame retardant is one or a combination of melamine polyphosphate and ammonium polyphosphate, and the flame retardant synergist is one or a combination of zinc borate, organic montmorillonite, and ZIF-67.

6. A method for preparing a deethanolized room temperature curing organic silica gel, comprising the steps of: preparing a composite thermal conductor; preparing a composite flame retardant; mixing a silicone rubber matrix; adding an auxiliary agent; and preparing a crosslinking system; characterized in that: In the above step 1, a surface modifier, a micron-sized skeleton filler, and a nano-sized bridging filler are prepared according to the formula of the composite thermal conductive agent, with the sum of the mass percentages of each component being 1. The micron-sized skeleton filler is added to a high-speed mixer, the temperature is raised to 80° C., the surface modifier is slowly added dropwise while stirring, the mixture is stirred at a stirring speed of 400 rpm for 30 minutes, the nano-sized bridging filler is added, stirring is continued for 15 minutes, and the mixture is cooled to room temperature to obtain a composite thermal conductive agent. In the above step 2, based on the sum of the mass percentages of each component being 1, a microcapsule wall material monomer, an intumescent flame retardant, and a flame retardant synergist are prepared according to the formula of the composite flame retardant, the intumescent flame retardant and the flame retardant synergist are premixed, the mixture is placed in deionized water, ultrasonically dispersed for 30 minutes, the microcapsule wall material monomer is added dropwise, the temperature is raised to 70° C., the mixture is stirred for reaction for 2 hours, and the composite flame retardant is obtained after filtration, washing, and vacuum drying; Wherein, in the above step 3, the sum of the mass percentages of each component is taken as 1, and a silicone rubber matrix, a crosslinking agent, a catalyst, a composite thermal conductor, a composite flame retardant and other additives are prepared according to the formula of organic silica gel, the silicone rubber matrix is placed in a blender, vacuum degassed for 15 minutes, and the composite thermal conductor and the composite flame retardant are added in three portions, stirring at a stirring speed of 200 rpm for 10 minutes after each addition, and then stirring at a stirring speed of 1000 rpm for 20 minutes to obtain a mixed silicone rubber matrix; In the above step 4, other additives are added to the mixed silicone rubber matrix and stirring is continued for 30 minutes; In the above step 5, the crosslinking agent is added to the mixed silicone rubber matrix under stirring conditions, stirred for 10 minutes, and then the catalyst solution is added, stirred for 5 minutes, and vacuum degassing is carried out for 30 minutes to obtain the product.

7. The method for preparing a deethanol-type room temperature curing organic silica gel according to claim 6, characterized in that: In the step 1, the composite thermal conductor needs to be passed through a 100-mesh sieve to remove agglomerates.

8. The method for preparing a deethanol-type room temperature curing organic silica gel according to claim 6, characterized in that: In the step 2, the mass ratio of the mixture to deionized water is 3:

7.

9. The method for preparing a deethanol-type room temperature curing organic silica gel according to claim 6, characterized in that: In the step 2, the composite flame retardant needs to be crushed to make the particle size reach 10 μm.

10. The method for preparing a deethanol-type room temperature curing organic silica gel according to claim 6, characterized in that: In the step 5, the catalyst solution is prepared by dissolving the catalyst in anhydrous ethanol to prepare a catalyst solution with a concentration of 5%.

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