High-temperature-resistant adhesive for bonding fluororubber and silicone rubber as well as preparation method and application of high-temperature-resistant adhesive

Abstract

The invention provides a high-temperature-resistant adhesive for bonding fluororubber and silicone rubber as well as a preparation method and application of the high-temperature-resistant adhesive, and belongs to the technical field of composite materials. The invention provides the high-temperature-resistant adhesive specially used for adhesion of fluororubber and silicone rubber, the problem that an existing adhesive is unstable in adhesion performance in a high-temperature environment is solved, long-term stable adhesion of two kinds of rubber in the high-temperature environment of 200 DEG C or above is achieved, and the requirements of the industrial field for high-performance and high-temperature-resistant rubber adhesion are met. According to the adhesive, the bonding reliability and durability of fluororubber and silicone rubber in a high-temperature environment are remarkably improved, the service life of related products is effectively prolonged, the maintenance cost is reduced, a more reliable solution is provided for application of rubber products in the high-temperature environment, and the preparation process is simple, easy to operate and easy to industrialize.

Description

Technical Field

[0001] The invention belongs to the technical field of composite materials, and specifically relates to a high temperature resistant adhesive for bonding fluororubber and silicone rubber, and a preparation method and application thereof. Background Art

[0002] Fluororubber and silicone rubber have important application value in modern industry due to their unique properties. Fluororubber has excellent chemical stability and high temperature resistance, can withstand a variety of highly corrosive chemicals, petroleum-based oils and organic solvents, and can maintain stable performance for a long time at high temperatures. Silicone rubber, with its silicon-oxygen bond main chain and organic side chain structure, exhibits excellent high and low temperature resistance (-50℃ to 250℃), electrical insulation, physiological inertness and flexibility.

[0003] With the development of industrial technology, aerospace, automobile, and electronic and electrical fields have put forward higher requirements for material performance. In the field of aerospace, the combination of fluororubber and silicone rubber has become an ideal material for engine seals and pipe connection parts because it has both chemical corrosion resistance, oil resistance, and high and low temperature resistance. In the automotive industry, especially the three-electric system and engine compartment components of new energy vehicles, they need to adapt to high temperatures and complex chemical environments, and there is a strong demand for the composite application of fluororubber and silicone rubber. For example, the turbocharger pipe often uses VMQ organic silicone as the outer layer and peroxide fluororubber or fluorosilicone as the inner layer. In the field of electronic and electrical appliances, the increase in chip integration has led to an increase in heat dissipation demand. The combined application of fluororubber and silicone rubber can meet the electrical insulation, sealing and protection needs in high temperature environments. However, due to the significant differences in chemical structure and surface properties between fluororubber and silicone rubber, achieving reliable bonding between the two has always been an industry problem. The bonding strength of ordinary adhesives drops significantly at high temperatures, resulting in problems such as debonding and aging, and cannot meet actual application needs. At present, adhesives on the market are difficult to maintain effective bonding when the temperature exceeds 150°C, which affects the service life of components, increases maintenance costs and safety hazards.

[0004] There are many shortcomings in the existing fluororubber and silicone rubber bonding technology. In terms of process, the surface treatment requirements are strict, and complex chemical corrosion or plasma treatment is required to overcome the problems of low surface energy and high chemical stability of the two rubbers, otherwise the bonding strength will be greatly affected; at the same time, the curing conditions are also very strict. Deviations in temperature, humidity and curing time will cause poor curing of the adhesive and affect the bonding performance. In terms of performance, the temperature resistance range is limited. Under extremely high or low temperatures, the adhesive is prone to softening, degrading or becoming brittle and cracking; in chemical media, due to the difference in the chemical medium resistance of the two rubbers, the bonding interface may be damaged; long-term use will also face aging problems, and the bonding strength will decrease over time. In terms of materials and costs, the applicable high-performance adhesives are not only of few types and high prices, but may also be in unstable supply. In addition, the cost of fluororubber and silicone rubber itself is high, resulting in high overall bonding process costs.

[0005] According to the search, patent CN104327426A discloses a fluororubber formula that can be bonded with silicone rubber. The method adjusts the ternary fluororubber formula to make the fluororubber and silicone rubber directly vulcanized and bonded; patent CN111363279B discloses a fluororubber composition, rubber product and preparation method that can be co-vulcanized and bonded with silicone rubber. The method prepares a fluororubber composition and co-vulcanizes it with silicone rubber for bonding; patent CN113817323B discloses a silicone rubber that can be bonded with fluororubber, and a rubber composite layer containing it. The method combines three polysilicones. The raw rubber is prepared by mixing oxane, and then the silicone rubber formula is adjusted to co-vulcanize and bond with fluororubber; although the fluororubber and silicone rubber adhesive parts prepared by the above three methods are simple, they cannot maintain a stable bonding effect after high-temperature aging; Patent CN102786701A discloses a fluororubber and silicone hot vulcanization bonding process, which calenders the bonding composition into a thin sheet and places it between the inner layer of fluororubber and the silicone to form a semi-finished product of the inner layer of fluororubber, the bonding composition and the silicone structure, and then heats and vulcanizes the inner layer of fluororubber and the silicone to bond and fix them. This method has many steps, complex process and cumbersome operation. Summary of the invention

[0006] The object of the present invention is to provide a high temperature resistant adhesive for bonding fluororubber and silicone rubber and a preparation method and application thereof.

[0007] The invention provides an adhesive, which is a product obtained by reacting an olefinic monomer and a catalyst in a solvent, wherein the mass ratio of the olefinic monomer to the catalyst is 100:0.1-2.

[0008] Furthermore, the mass ratio of the olefin-containing monomer to the catalyst is 100:0.5-1.

[0009] Furthermore, the volume ratio of the solvent to the olefinic monomer is 1.5 to 2:1.

[0010] Further, the solvent is toluene, xylene or cyclohexane;

[0011] The alkenyl-containing monomer is selected from vinyl triethoxysilane monomer, phenyl vinyl triethoxysilane monomer or a mixture of the two, preferably a mixture of vinyl triethoxysilane monomer and phenyl vinyl triethoxysilane monomer in a mass ratio of 70-80:20-30;

[0012] The catalyst is one or a mixture of dibutyltin dilaurate, stannous octoate, tetrabutyl titanate and tetramethylammonium hydroxide.

[0013] The present invention also provides a method for preparing the adhesive, which comprises the following steps: mixing an alkenyl-containing silane coupling agent and a catalyst in a solvent for reaction, precipitating, washing, and drying to obtain the adhesive.

[0014] Furthermore, the method comprises the following steps:

[0015]

[0016] Here, x is an integer ranging from 0 to 8, y is an integer ranging from 0 to 4, and m is an integer ranging from 5 to 10.

[0017] Furthermore, the reaction conditions are: reacting at a speed of 200-300 rpm for 4-8 hours at 60-100° C. in a nitrogen atmosphere, preferably reacting at a speed of 200-300 rpm for 6 hours at 80° C. in a nitrogen atmosphere.

[0018] Furthermore, the solvent for washing the precipitation is an alcohol solvent, preferably anhydrous ethanol.

[0019] Furthermore, the drying temperature is 60-80°C.

[0020] The present invention also provides a fluorosilicone rubber, which is a product obtained by bonding a fluororubber compound and a silicone rubber compound by hot pressing;

[0021] The fluororubber compound is prepared from the following raw materials in parts by weight: 100 parts of fluororubber raw rubber, 3 to 6 parts of acid absorbent, 10 to 30 parts of filler, 1 to 3 parts of vulcanizing agent, 1 to 3 parts of vulcanization accelerator, and 1 to 3 parts of the above-mentioned adhesive, preferably 100 parts of fluororubber raw rubber, 3 parts of acid absorbent, 25 parts of filler, 1.5 parts of vulcanizing agent, 1 part of vulcanization accelerator, and 1 part of the above-mentioned adhesive;

[0022] The silicone rubber compound is prepared from the following raw materials in parts by weight: 100 parts of silicone rubber raw rubber, 30-70 parts of white carbon black, 10-15 parts of hydroxy silicone oil, 1-3 parts of vulcanizing agent, and 4-8 parts of heat-resistant agent; preferably 100 parts of silicone rubber raw rubber, 30 parts of white carbon black, 10 parts of hydroxy silicone oil, 1 part of vulcanizing agent, and 4 parts of heat-resistant agent.

[0023] Furthermore, the fluororubber raw rubber is peroxide fluororubber raw rubber, bisphenol fluororubber raw rubber or perfluoroether rubber raw rubber;

[0024] The acid absorbent is zinc oxide, magnesium oxide or calcium hydroxide;

[0025] The filler is any one of barium sulfate, calcium silicate, carbon black, diatomaceous earth, silica powder and white carbon black, or a mixture of any of the above;

[0026] The vulcanizing agent is 2,5-di-tert-butylperoxy-2,5-dimethylethane or bisphenol AF;

[0027] The vulcanization accelerator is triallyl isocyanurate or benzyl triphenyl phosphonium chloride;

[0028] The heat-resistant agent is cerium oxide (CeO 2 ), titanium dioxide (TiO 2 ), any one or a mixture of any two of the rare earth heat resistant agents.

[0029] Furthermore, the white carbon black has a specific surface area of ​​200 to 300 m 2 / g of hydrophilic silica;

[0030] The hydroxyl silicone oil has a hydroxyl value content of ≥6.5wt% and a kinematic viscosity of ≤35mm at 25°C 2 / S.

[0031] Furthermore, the hydroxyl content of the hydrophilic silica is 0.5-0.6.

[0032] Furthermore, the preparation method of the fluororubber compound comprises the following steps: mixing the fluororubber raw rubber with an acid absorber, a filler, a vulcanizing agent and a vulcanization accelerator, and then re-mixing to obtain the fluororubber compound;

[0033] The preparation method of the silicone rubber compound comprises the following steps: kneading the silicone rubber raw rubber with white carbon black, hydroxy silicone oil, a vulcanizing agent and a heat-resistant agent, and then re-mixing to obtain the silicone rubber compound.

[0034] The present invention also provides a method for preparing the above fluorosilicone rubber, which comprises the following steps: bonding the fluororubber compound and the silicone rubber compound by hot pressing to obtain the fluorosilicone rubber.

[0035] The present invention also provides the use of the above-mentioned adhesive and the above-mentioned fluorosilicone rubber in preparing high-temperature resistant bonding materials, wherein the high-temperature resistant bonding materials are turbocharger hoses, fuel system components, seals, sensors or shielded cable materials.

[0036] The present invention has achieved the following beneficial effects:

[0037] The present invention provides a high temperature resistant adhesive specially used for bonding fluororubber and silicone rubber, solves the problem of unstable bonding performance of existing adhesives in high temperature environments, realizes long-term stable bonding of two rubbers in high temperature environments above 200°C, and meets the demand for high performance and high temperature resistant rubber bonding in the industrial field. The adhesive of the present invention significantly improves the bonding reliability and durability of fluororubber and silicone rubber in high temperature environments, effectively prolongs the service life of related products, reduces maintenance costs, and provides a more reliable solution for the application of rubber products in high temperature environments. The preparation process is simple, easy to operate, and easy to industrialize.

[0038] Obviously, according to the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, other various forms of modification, replacement or change may be made.

[0039] The above contents of the present invention are further described in detail below through specific implementation methods in the form of examples. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following examples. All technologies realized based on the above contents of the present invention belong to the scope of the present invention. DETAILED DESCRIPTION

[0040] The raw materials and equipment used in the present invention are all known products, which are obtained by purchasing commercially available products.

[0041] In the formula of the specific embodiment of the present invention, "part" means part by weight, and 1 part is 1 g.

[0042] The "room temperature" referred to in the present invention is 25±5°C.

[0043] (1) The preparation of the fluororubber compound of the present invention is as follows:

[0044] Formula: When preparing fluororubber compound, by weight, 100 parts of fluororubber raw rubber, 3-6 parts of acid absorber, 10-30 parts of filler, 1-3 parts of vulcanizing agent, 1-3 parts of vulcanization accelerator and / or 1-3 parts of adhesive.

[0045] Preparation method: Add fluororubber raw rubber together with acid absorber, filler, vulcanizer and vulcanization accelerator into an internal mixer for mixing, then leave it at room temperature for 24 hours, and then re-mix it on an open mixer to prepare fluororubber mixed rubber, which is bonded to silicone rubber by hot vulcanization.

[0046] The fluororubber raw rubber is one of peroxide fluororubber raw rubber, bisphenol fluororubber raw rubber and perfluoroether rubber raw rubber. The acid absorber in the peroxide rubber and perfluoroether rubber is zinc oxide, the filler is any one of barium sulfate, calcium silicate, carbon black, diatomaceous earth, silicon powder and white carbon black or a mixture of any several thereof, the vulcanizing agent is 2,5-di-tert-butyl peroxide-2,5-dimethylethane, and the vulcanization accelerator is triallyl isocyanurate. The acid absorber in the bisphenol rubber is magnesium oxide and calcium hydroxide, the filler is any one of barium sulfate, calcium silicate, carbon black, diatomaceous earth, silicon powder and white carbon black or a mixture of any several thereof, the vulcanizing agent is bisphenol AF, and the vulcanization accelerator is benzyltriphenylphosphonium chloride.

[0047] (2) The preparation of the silicone rubber compound of the present invention is as follows:

[0048] Formula: When preparing silicone rubber compound, by weight, 100 parts of silicone rubber raw rubber, 30-70 parts of white carbon black, 10-15 parts of hydroxy silicone oil, 1-3 parts of vulcanizing agent, and 4-8 parts of heat-resistant agent.

[0049] Preparation method: Add silicone rubber raw rubber, white carbon black, hydroxy silicone oil, vulcanizing agent and heat-resistant agent into a kneading machine for kneading, then re-refine on an open mill to prepare a silicone rubber compound, and bond it with fluororubber by hot vulcanization.

[0050] The white carbon black has a specific surface area of ​​200 to 300 m 2 / g of hydrophilic silica, wherein the hydroxyl content of the hydrophilic silica is 0.5-0.6; the hydroxyl value content of the hydroxy silicone oil is ≥6.5wt%, and the kinematic viscosity at 25°C is ≤35mm 2 / S; the vulcanizing agent is 2,5-di-tert-butylperoxy-2,5-dimethylethane; the heat-resistant agent is CeO 2 、TiO 2 , any one or a mixture of any two of the rare earth heat resistant agents.

[0051] Example 1. Preparation of Adhesive I of the Present Invention

[0052] Solution polymerization was carried out in a three-necked reaction bottle to prepare a high temperature resistant adhesive. 150 parts of toluene and 100 parts of vinyl triethoxysilane monomer were added to the three-necked bottle, nitrogen was introduced under stirring, the stirring speed was controlled at 300 rpm, 0.5 parts of dibutyltin dilaurate were added to the reaction bottle, stirring was continued for 20 minutes, the temperature was started to rise to 80°C, after 6 hours of reaction, the solvent was removed by vacuum distillation, and then the crude product was dissolved in an appropriate amount of anhydrous ethanol, and precipitation washing was performed multiple times to remove the residual catalyst and unreacted monomer. Finally, the washed product was dried in a vacuum drying oven at 80°C to constant weight to obtain adhesive I.

[0053] Example 2: Preparation of Adhesive II of the Present Invention

[0054] The method of Reference Example 1 is different only in that the vinyl triethoxy silane monomer is replaced with phenyl vinyl triethoxy silane monomer to obtain Adhesive II.

[0055] Example 3: Preparation of Adhesive III of the Present Invention

[0056] The preparation of the adhesive of the present invention is carried out by the following route:

[0057]

[0058] Here, x is an integer ranging from 0 to 8, y is an integer ranging from 0 to 4, and m is an integer ranging from 5 to 10.

[0059] The method of Reference Example 1 is different in that the vinyl triethoxysilane monomer is replaced by a mixed monomer consisting of 70 parts of vinyl triethoxysilane and 30 parts of phenyl vinyl triethoxysilane to obtain an adhesive III.

[0060] Example 4. Preparation of Adhesive IV of the Present Invention

[0061] The method of Reference Example 1 was followed, except that the vinyl triethoxysilane monomer was replaced with a mixed monomer consisting of 75 parts of vinyl triethoxysilane and 25 parts of phenyl vinyl triethoxysilane, to obtain an adhesive IV.

[0062] Example 5. Preparation of Adhesive V of the Present Invention

[0063] The method of Reference Example 1 is different in that the vinyl triethoxysilane monomer is replaced by a mixed monomer consisting of 80 parts of vinyl triethoxysilane and 20 parts of phenyl vinyl triethoxysilane, to obtain an adhesive V.

[0064] Example 6. Preparation of Adhesive VI of the Present Invention

[0065] The method of Reference Example 1 is different only in that the vinyl triethoxysilane monomer is replaced by a mixed monomer consisting of 40 parts of vinyl triethoxysilane and 60 parts of phenyl vinyl triethoxysilane to obtain Adhesive VI.

[0066] Example 7. Preparation of Adhesive VII of the Present Invention

[0067] The method of Reference Example 1 is different in that the vinyl triethoxysilane monomer is replaced by a mixed monomer consisting of 90 parts of vinyl triethoxysilane and 10 parts of phenyl vinyl triethoxysilane to obtain Adhesive VII.

[0068] Example 8: Preparation of fluorosilicone rubber bonded with adhesive

[0069] Step 1: prepare a fluororubber compound according to the following formula: 100 parts of peroxide fluororubber raw rubber, 3 parts of zinc oxide, 25 parts of carbon black, 1.5 parts of 2,5-di-tert-butyl peroxy-2,5-dimethylethane, 1 part of triallyl isocyanurate, and 1 part of adhesive I obtained in Example 1;

[0070] Step 2: Prepare silicone rubber compound according to the following formula: 100 parts of silicone rubber, 30 parts of white carbon black, 10 parts of hydroxy silicone oil, 1 part of 2,5-di-tert-butyl peroxide-2,5-dimethylethane, 1 part of cerium oxide (CeO 2 ) 4 copies;

[0071] Step 3: Bond the fluororubber compound and the silicone rubber compound by hot pressing to obtain fluorosilicone rubber bonded by adhesive I (referred to as sample 1).

[0072] Referring to the preparation method of Sample 1, according to the material formula in Table 1, under the same experimental conditions, fluorosilicone rubber bonded with different adhesives was prepared (respectively recorded as Sample 2, Sample 3, Sample 4, Sample 5, Sample 6, and Sample 7).

[0073] Table 1 Component composition of fluorosilicone rubber bonded with different adhesives

[0074]

[0075] Example 9: Preparation of fluorosilicone rubber bonded with adhesive

[0076] A fluororubber compound was prepared by the method of Reference Example 8, with the only difference being that the peroxide fluororubber raw rubber in step one was replaced by bisphenol fluororubber raw rubber, zinc oxide was replaced by magnesium oxide, 2,5-di-tert-butylperoxy-2,5-dimethylethane was replaced by bisphenol AF, and triallyl isocyanurate was replaced by benzyltriphenylphosphonium chloride, to obtain a fluorosilicone rubber bonded with Adhesive I (referred to as Sample I).

[0077] Referring to the preparation method of sample I, according to the material formula in Table 2, under the same experimental conditions, fluorosilicone rubber bonded with different adhesives was prepared (respectively recorded as sample II, sample III, sample IV, sample V, sample VI, and sample VII).

[0078] Table 2 Component composition of fluorosilicone rubber bonded with different adhesives

[0079]

[0080] Example 10: Preparation of fluorosilicone rubber bonded with adhesive

[0081] A fluororubber compound was prepared by the method of Example 8, except that the peroxide fluororubber raw rubber in step 1 was replaced with peroxide perfluoroether rubber raw rubber to obtain a fluorosilicone rubber bonded with adhesive I (referred to as sample A).

[0082] Referring to the preparation method of sample A, according to the material formula in Table 3, under the same experimental conditions, fluorosilicone rubber bonded with different adhesives was prepared (respectively recorded as sample B, sample C, sample D, sample E, sample F, and sample G).

[0083] Table 3 Component composition of fluorosilicone rubber bonded with different adhesives

[0084]

[0085] The following is the preparation of the independent sample through the control example.

[0086] Comparative Example 1: Preparation of fluorosilicone rubber

[0087] Referring to the preparation method of sample 1, according to the material formula in Table 1 and under the same experimental conditions, a fluorosilicone rubber without adhesive was prepared (referred to as sample 8).

[0088] Comparative Example 2: Preparation of Fluorosilicone Rubber

[0089] Referring to the preparation method of sample I, according to the material formula in Table 2, under the same experimental conditions, a fluorosilicone rubber without adhesive was prepared (referred to as sample VIII).

[0090] Comparative Example 3: Preparation of Fluorosilicone Rubber

[0091] Referring to the preparation method of sample A, according to the material formula in Table 3, under the same experimental conditions, a fluorosilicone rubber without adhesive bonding was prepared (referred to as sample H).

[0092] The beneficial effects of the present invention are demonstrated by experimental examples below.

[0093] Experimental Example 1: Testing the bonding properties of fluorosilicone rubber

[0094] 1. Experimental methods

[0095] The fluorosilicone rubbers prepared in the examples and control examples were subjected to peeling tests according to GB / T532-2008 before and after aging at 200° C. for 7 days.

[0096] 2. Experimental results

[0097] The test results are shown in Table 4.

[0098] Table 4 Performance test results of different fluorosilicone rubbers

[0099]

[0100]

[0101] The above results show that in the test of the bonding performance of the fluororubber and the silicone rubber of the present invention, the separation mode during peeling is manifested as the rubber breaking and the separation of the bonding interface. Among them, the rubber body breaks during peeling, indicating that the bonding force between the adhesive and the rubber is greater than the cohesive strength of the rubber itself. In this case, the bonding performance is the best, and the adhesive can firmly bond the two rubbers together, even in the peeling process, the rubber itself is destroyed first.

[0102] Compared with not adding the adhesive of the present invention, the bonding performance between fluororubber and silicone rubber can be significantly improved after adding the adhesive. In the preparation of the adhesive, the adhesive prepared by adding phenyl vinyl triethoxysilane monomer is better than the adhesive prepared by adding vinyl triethoxysilane monomer in improving the bonding performance between fluororubber and silicone rubber; the adhesive added with mixed monomers (vinyl triethoxysilane monomer + phenyl vinyl triethoxysilane monomer) is better than the adhesive prepared by adding single monomers in improving the bonding performance between fluororubber and silicone rubber. Among them, the adhesive prepared by adding vinyl triethoxysilane monomer and phenyl vinyl triethoxysilane monomer at a dosage ratio of 40:60 and 90:10 has a bonding performance effect of 0.6-0.7N / mm on fluororubber and silicone rubber, and the adhesive prepared by adding vinyl triethoxysilane monomer and phenyl vinyl triethoxysilane monomer at a dosage ratio of 70-80:20-30 significantly improves the bonding performance between fluororubber and silicone rubber, achieving unexpected technical effects.

[0103] In summary, the present invention provides a high temperature resistant adhesive for bonding fluororubber and silicone rubber, and a preparation method and application thereof. The present invention provides a high temperature resistant adhesive specifically used for bonding fluororubber and silicone rubber, which solves the problem of unstable bonding performance of existing adhesives in high temperature environments, achieves long-term stable bonding of the two rubbers in high temperature environments above 200°C, and meets the needs of the industrial field for high-performance, high temperature resistant rubber bonding. The adhesive of the present invention significantly improves the bonding reliability and durability of fluororubber and silicone rubber in high temperature environments, effectively extends the service life of related products, reduces maintenance costs, and provides a more reliable solution for the application of rubber products in high temperature environments. The preparation process is simple, easy to operate, and easy to industrialize.

Claims

1. An adhesive, characterized in that: It is a product obtained by reacting an olefin-containing monomer and a catalyst in a solvent, wherein the mass ratio of the olefin-containing monomer to the catalyst is 100:0.1-2.

2. The adhesive according to claim 1, characterized in that The mass ratio of the olefin-containing monomer to the catalyst is 100:0.5-1.

3. The adhesive according to claim 1, characterized in that The solvent is toluene, xylene or cyclohexane; The alkenyl-containing monomer is selected from vinyl triethoxysilane monomer, phenyl vinyl triethoxysilane monomer or a mixture of the two, preferably a mixture of vinyl triethoxysilane monomer and phenyl vinyl triethoxysilane monomer in a mass ratio of 70-80:20-30; The catalyst is one or a mixture of dibutyltin dilaurate, stannous octoate, tetrabutyl titanate and tetramethylammonium hydroxide.

4. A method for preparing the adhesive according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: mixing an alkenyl-containing silane coupling agent and a catalyst in a solvent for reaction, precipitating, washing, and drying to obtain the product.

5. The method according to claim 4, characterized in that The reaction conditions are: reacting at a speed of 200-300 rpm for 4-8 hours at 60-100° C. in a nitrogen atmosphere, preferably reacting at a speed of 200-300 rpm for 6 hours at 80° C. in a nitrogen atmosphere.

6. A fluorosilicone rubber, characterized in that: It is a product obtained by bonding fluororubber compound and silicone rubber compound by hot pressing; Wherein, the fluororubber compound is prepared from the following raw materials in parts by weight: 100 parts of fluororubber raw rubber, 3 to 6 parts of acid absorbent, 10 to 30 parts of filler, 1 to 3 parts of vulcanizing agent, 1 to 3 parts of vulcanization accelerator, 1 to 3 parts of the adhesive according to any one of claims 1 to 3, preferably 100 parts of fluororubber raw rubber, 3 parts of acid absorbent, 25 parts of filler, 1.5 parts of vulcanizing agent, 1 part of vulcanization accelerator, 1 part of the adhesive according to any one of claims 1 to 3; The silicone rubber compound is prepared from the following raw materials in parts by weight: 100 parts of silicone rubber raw rubber, 30-70 parts of white carbon black, 10-15 parts of hydroxy silicone oil, 1-3 parts of vulcanizing agent, and 4-8 parts of heat-resistant agent; preferably 100 parts of silicone rubber raw rubber, 30 parts of white carbon black, 10 parts of hydroxy silicone oil, 1 part of vulcanizing agent, and 4 parts of heat-resistant agent.

7. The fluorosilicone rubber according to claim 6, characterized in that: The fluororubber raw rubber is peroxide fluororubber raw rubber, bisphenol fluororubber raw rubber or perfluoroether rubber raw rubber; The acid absorbent is zinc oxide, magnesium oxide or calcium hydroxide; The filler is any one of barium sulfate, calcium silicate, carbon black, diatomaceous earth, silica powder and white carbon black, or a mixture of any of the above; The vulcanizing agent is 2,5-di-tert-butylperoxy-2,5-dimethylethane or bisphenol AF; The vulcanization accelerator is triallyl isocyanurate or benzyl triphenyl phosphonium chloride; The heat-resistant agent is any one of CeO2, TiO2, and rare earth heat-resistant agents, or a mixture of any of them.

8. The fluorosilicone rubber according to claim 6, characterized in that: The preparation method of the fluororubber mixed rubber comprises the following steps: mixing the fluororubber raw rubber with an acid absorber, a filler, a vulcanizing agent and a vulcanization accelerator, and then re-mixing to obtain the mixed rubber; The preparation method of the silicone rubber compound comprises the following steps: kneading the silicone rubber raw rubber with white carbon black, hydroxy silicone oil, a vulcanizing agent and a heat-resistant agent, and then re-mixing to obtain the silicone rubber compound.

9. A method for preparing the fluorosilicone rubber according to any one of claims 6 to 8, characterized in that: The method comprises the following steps: bonding the fluororubber mixed rubber and the silicone rubber mixed rubber by hot pressing to obtain the obtained product.

10. Use of the adhesive according to any one of claims 1 to 3 and the fluorosilicone rubber according to any one of claims 6 to 8 in the preparation of high temperature resistant adhesive materials, wherein the high temperature resistant adhesive materials are turbocharger hoses, fuel system components, seals, sensors or shielded cable materials.

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