Highly pressure-resistant and oxidation-resistant and corrosion-resistant silicone rubber and preparation method thereof

Abstract

The application relates to a high-pressure-resistant and oxidation-corrosion-resistant silicone rubber and a preparation method thereof. The silicone rubber is prepared from the following raw materials in parts by weight: methyl vinyl silicone rubber 100 parts, active group double-terminated polydimethylsiloxane 1-8 parts, 1,1,3,3,5,5-hexamethyltrisiloxane 10-20 parts, methyl dodecafluoroheptyl methacrylate 1-5 parts, methyl triallyl silane 3-5 parts, white carbon black 10-30 parts, fiber filler 5-15 parts, catalyst A 1-3 parts, catalyst B 0.01-0.03 parts, and inhibitor 0.001-0.003 parts. The reactants formed by methyl dodecafluoroheptyl methacrylate and methyl triallyl silane, the active group double-terminated polydimethylsiloxane and the 1,1,3,3,5,5-hexamethyltrisiloxane are reacted with the methyl vinyl silicone rubber to form a multi-branched crosslinked network structure, so that the obtained silicone rubber has better mechanical properties, oxidation-corrosion resistance and pressure resistance.

Description

Technical Field

[0001] The present application relates to the field of silicone rubber, and more specifically, to a high-pressure-resistant and oxidation-resistant silicone rubber and a preparation method thereof. Background Art

[0002] Silicone rubber has excellent softness, heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance. It also has the advantages of environmental protection and non-toxicity. Therefore, it is often used in the production of various hoses, sealing gaskets, spacers, leather cups, valves, shockproof parts, etc.

[0003] Silicone tubes made of silicone rubber are used in many fields due to their good elasticity, high stability, chemical corrosion resistance and softness. However, for silicone tubes used in automotive hydrogen fuel cells, the compression resistance and oxidation corrosion resistance of silicone tubes become key challenges in high-pressure, highly chemically active environments such as hydrogen-powered vehicles. Existing technologies mainly improve performance by increasing the thickness of the tube wall, but these methods often sacrifice flexibility or increase costs. There are also methods that produce silicone rubber braided tubes, form a multi-layer structure on the rubber tube wall, and weave it with high-strength fibers to enhance the compressive strength and mechanical properties of the silicone tubes, but the production process is relatively complicated and the production efficiency is low.

[0004] At the same time, silicone tubing is susceptible to gas permeation in high-pressure, high-temperature, and hydrogen environments, and its performance significantly degrades after prolonged exposure to chemicals, seriously affecting its service life and safety. Therefore, developing a new silicone rubber material and preparation method that can maintain the flexibility of silicone tubing while significantly improving its compressive and oxidative corrosion resistance has become an urgent issue in the current hydrogen energy vehicle field. Summary of the Invention

[0005] In order to obtain better flexibility and at the same time better pressure resistance and corrosion resistance, the present application provides a high pressure resistance and oxidation corrosion resistance silicone rubber and a preparation method thereof.

[0006] In a first aspect, the present application provides a high-pressure-resistant and anti-oxidative-corrosion silicone rubber, characterized in that it is composed of the following raw materials in parts by weight:

[0007] 100 parts of methyl vinyl silicone rubber

[0008] 1-8 parts of active group double-terminated polydimethylsiloxane

[0009] 10-20 parts of 1,1,3,3,5,5-hexamethyltrisiloxane

[0010] 1-5 parts of dodecafluoroheptyl methacrylate

[0011] 3-5 parts of methyl triallylsilane

[0012] 10-30 parts of white carbon black

[0013] 5-15 parts fiber filler

[0014] Catalyst A1-3 parts

[0015] Catalyst B 0.01-0.03 parts

[0016] Inhibitor 0.001-0.003 parts.

[0017] In the above scheme, methyl vinyl silicone rubber has excellent flexibility. Through the grafting reaction between the active group of dodecafluoroheptyl methacrylate and one active group of methyl triallylsilane, the remaining two active groups further react with the silicone rubber, and fluorine is introduced into the silicone rubber raw material system. The fluorine-containing polymer has excellent resistance to oxidative corrosion. Combined with the active group-terminated polydimethylsiloxane with two active groups and 1,1,3,3,5,5-hexamethyltrisiloxane, the reaction forms a cross-linked network structure, giving the silicone rubber excellent mechanical properties, oxidative corrosion resistance, and compressive resistance. When used in the production of hydrogen pipes for hydrogen-powered vehicles, it has excellent compressive resistance.

[0018] Both fiber filler and silica play a reinforcing role, further improving the compressive and mechanical properties of silicone rubber.

[0019] In summary, the present application uses the reactants formed by dodecafluoroheptyl methacrylate and methyl triallylsilane, active group double-terminated polydimethylsiloxane and 1,1,3,3,5,5-hexamethyltrisiloxane to form a composite cross-linking reaction with methyl vinyl silicone rubber to form a multi-branched cross-linked network structure, and then combines it with fiber filler and white carbon black, and with the assistance of a catalyst, so that the obtained silicone rubber has excellent mechanical properties, anti-oxidation and corrosion properties, and compressive properties.

[0020] Preferably, the methyl vinyl silicone rubber is composed of the following raw materials in parts by weight:

[0021] 20-40 parts of methyl vinyl silicone rubber with a vinyl content of 0.08-0.17%

[0022] 30-40 parts of methyl vinyl silicone rubber with a vinyl content of 0.18-0.30%

[0023] 20-50 parts of methyl vinyl silicone rubber with a vinyl content of 1.01-1.27.

[0024] The molecular formula of methyl vinyl silicone rubber is generally straight chain. When stretched, it is easy to deform and has poor resistance to low tear permanent deformation. By adding methyl vinyl silicone rubber with different vinyl contents, compounding, a multi-branched polymer is formed, and then further cross-linking reaction is carried out with the graft formed by dodecafluoroheptyl methacrylate and methyl triallylsilane, active group double-terminated polydimethylsiloxane, and 1,1,3,3,5,5-hexamethyltrisiloxane to form a multi-branched cross-linked network structure, further improving the mechanical properties, oxidation resistance, corrosion resistance and compressive resistance of silicone rubber.

[0025] Preferably, the number average molecular weight of the methyl vinyl silicone rubber is 100,000-500,000.

[0026] The methyl vinyl silicone rubber with the above number average molecular weight range is selected and reacted with a graft formed by dodecafluoroheptyl methacrylate and methyl triallylsilane, an active group double-terminated polydimethylsiloxane, and 1,1,3,3,5,5-hexamethyltrisiloxane to form a silicone rubber with better mechanical properties, oxidation resistance and compressive resistance.

[0027] Preferably, the number average molecular weight of the active group double-terminated polydimethylsiloxane is 5000-8000.

[0028] The above molecular weight range allows the active group double-terminated polydimethylsiloxane to interact with the graft formed by dodecafluoroheptyl methacrylate and methyl triallylsilane, and 1,1,3,3,5,5-hexamethyltrisiloxane, and further cross-links the methyl vinyl silicone rubber to obtain a stable cross-linked network structure and obtain better mechanical, oxidative corrosion resistance and compressive resistance. When used in automotive hydrogen fuel cell silicone hoses, it can further improve durability and safety.

[0029] Preferably, the active group double-terminated polydimethylsiloxane is composed of one or more of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloxypropyl polydimethylsiloxane.

[0030] Hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloyloxypropyl polydimethylsiloxane have double-terminated active groups and can be combined with the graft formed by dodecafluoroheptyl methacrylate and methyl triallylsilane and 1,1,3,3,5,5-hexamethyltrisiloxane to give the resulting silicone rubber better mechanical properties, corrosion resistance, and compressive resistance.

[0031] Preferably, the active group double-terminated polydimethylsiloxane is composed of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloxypropyl polydimethylsiloxane in a weight ratio of 1: (1.2-1.8): (1-3).

[0032] When hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane and double-terminated methacryloyloxypropyl polydimethylsiloxane are compounded, they play a synergistic role and interact with the graft formed by dodecafluoroheptyl methacrylate and methyl triallylsilane and 1,1,3,3,5,5-hexamethyltrisiloxane, making the performance of silicone rubber better.

[0033] Preferably, the fiber filler is polyetheretherketone fiber and / or aramid fiber.

[0034] Polyetheretherketone fiber and aramid fiber have good anti-oxidation and corrosion resistance, tensile strength, etc., and combined with the raw material system of this application, the comprehensive performance of silicone rubber is further improved.

[0035] Preferably, the catalyst A is a platinum catalyst or a dipentadienyl sulfiding agent.

[0036] The use of platinum catalyst and dipentadienyl vulcanizing agent can promote the formation of large molecular polymers in silicone rubber and facilitate the curing reaction, so that silicone rubber has better performance.

[0037] Preferably, the catalyst B is benzoyl peroxide; and the inhibitor is p-hydroxyanisole.

[0038] The use of catalyst B as a peroxide can promote the reaction of dodecafluoroheptyl methacrylate and methyl triallylsilane, and with the assistance of the inhibitor, the inhibitor inhibits the self-polymerization of the monomers, thereby forming a long-chain graft. When mixed with the silicone rubber raw material system, under the action of catalyst B, the active groups contained in the graft further react with methyl vinyl silicone rubber, and then cooperate with the active group double-terminated polydimethylsiloxane and 1,1,3,3,5,5-hexamethyltrisiloxane to form a network polymer of multiple cross-linked monomers, so that the obtained silicone rubber has better performance.

[0039] In a second aspect, the present application provides a method for preparing a high-pressure-resistant and oxidation-resistant silicone rubber, comprising the following steps:

[0040] Step 1: Weigh dodecafluoroheptyl methacrylate, methyl triallylsilane, inhibitor, and catalyst B in parts by weight, mix them evenly, and heat to react to obtain reactant C; and mix active group di-terminated polydimethylsiloxane, 1,1,3,3,5,5-hexamethyltrisiloxane, white carbon black, and fiber filler in parts by weight to obtain mixture D;

[0041] Step 2: Weigh methyl vinyl silicone rubber in parts by weight, and evenly mix all reactants C and mixture D obtained in step 1 to obtain mixed rubber E;

[0042] Step 3: Evenly mix all the mixed rubber obtained in step 2 with catalyst A to obtain high-pressure-resistant and anti-oxidation-corrosion silicone rubber.

[0043] In the above process, dodecafluoroheptyl methacrylate and methyltriallylsilane are grafted by the action of inhibitor and catalyst B, wherein the active group of allyl fluorobenzene reacts with an active group in methyltriallylsilane to generate a graft containing an active group.

[0044] After white carbon black and fiber fillers are evenly dispersed in active group double-terminated polydimethylsiloxane and 1,1,3,3,5,5-hexamethyltrisiloxane, they are added to methyl vinyl silicone rubber through reactant C. During the heating process, the raw material system is further reacted to form a mixed rubber, which is further reacted to produce a macromolecular cross-linked network structure under the action of the added catalyst.

[0045] The particle size of white carbon black is preferably 500 mesh.

[0046] In summary, this application has the following beneficial effects:

[0047] 1. In the present application, the reactants formed by dodecafluoroheptyl methacrylate and methyl triallylsilane, active group double-terminated polydimethylsiloxane and 1,1,3,3,5,5-hexamethyltrisiloxane are compounded and cross-linked with methyl vinyl silicone rubber to form a multi-branched cross-linked network structure, which is then combined with fiber fillers and white carbon black, and with the assistance of a catalyst, so that the obtained silicone rubber has excellent mechanical properties, anti-oxidation and corrosion properties, and compressive properties.

[0048] 2. Through the action of inhibitor and catalyst B, dodecafluoroheptyl methacrylate and methyl triallylsilane are subjected to a grafting reaction, wherein the active group of allyl fluorobenzene reacts with an active group in methyl triallylsilane to generate a graft containing an active group.

[0049] After white carbon black and fiber fillers are evenly dispersed in active group double-terminated polydimethylsiloxane and 1,1,3,3,5,5-hexamethyltrisiloxane, they are added to methyl vinyl silicone rubber through reactant C. During the heating process, the raw material system is further reacted to form a mixed rubber, which is further reacted to produce a macromolecular cross-linked network structure under the action of the added catalyst. DETAILED DESCRIPTION

[0050] The present application is further described in detail below with reference to the embodiments.

[0051] Example

[0052] Example 1

[0053] A high-pressure-resistant and oxidation-resistant silicone rubber is prepared by the following method:

[0054] Step 1: Weigh 5 kg of dodecafluoroheptyl methacrylate, 3 kg of methyl triallylsilane, 0.03 kg of catalyst B, and 0.001 kg of inhibitor into a reactor, mix well, heat to 60°C, and react for 1 hour to obtain reactant C; weigh 1 kg of active group di-terminated polydimethylsiloxane, 20 kg of 1,1,3,3,5,5-hexamethyltrisiloxane, 10 kg of white carbon black, and 15 kg of fiber filler and mix well to obtain mixture D;

[0055] Step 2: According to parts by weight, 100 kg of methyl vinyl silicone rubber, all reactants C obtained in step 1, and all mixture D were mixed uniformly to obtain a mixed rubber E;

[0056] Step 3: All the mixed rubber obtained in step 2 is mixed evenly with 3 kg of catalyst A in a double-roll mixer to obtain a high-compression and oxidation-resistant silicone rubber.

[0057] Methyl vinyl silicone rubber with a vinyl content of 0.17% and a number-average molecular weight of 100,000. Catalyst B is benzoyl peroxide; inhibitor is p-hydroxyanisole. Catalyst A is a platinum catalyst. The fiber filler is polyetheretherketone fiber. The active group-dicapped polydimethylsiloxane is bicapped methacryloyloxypropyl polydimethylsiloxane. The number-average molecular weight of the active group-dicapped polydimethylsiloxane is 5000. The average fiber diameter of the fiber filler is 2 microns and the length is 20 microns.

[0058] Example 2-3

[0059] The difference between Example 2-3 and Example 1 is that the amount of raw materials and process parameters are different, as shown in Table 1;

[0060] Table 1 Raw material dosage of Examples 1-3 (kg)

[0061]

[0062]

[0063] Example 4

[0064] The difference between Example 4 and Example 2 is that the methyl vinyl silicone rubber is obtained by mixing 20 kg of methyl vinyl silicone rubber with a vinyl content of 0.08%, 30 kg of methyl vinyl silicone rubber with a vinyl content of 0.30%, and 50 kg of methyl vinyl silicone rubber with a vinyl content of 1.27.

[0065] Example 5

[0066] The difference between Example 5 and Example 2 is that the methyl vinyl silicone rubber is obtained by mixing 30 kg of methyl vinyl silicone rubber with a vinyl content of 0.15%, 30 kg of methyl vinyl silicone rubber with a vinyl content of 0.25%, and 40 kg of methyl vinyl silicone rubber with a vinyl content of 1.01.

[0067] Example 6

[0068] The difference between Example 6 and Example 2 is that the methyl vinyl silicone rubber is obtained by mixing 40 kg of methyl vinyl silicone rubber with a vinyl content of 0.17%, 40 kg of methyl vinyl silicone rubber with a vinyl content of 0.18%, and 20 kg of methyl vinyl silicone rubber with a vinyl content of 1.15.

[0069] Example 7

[0070] The difference between Example 7 and Example 5 is that the active group-terminated polydimethylsiloxane is a hydroxyl-diterminated polydimethylsiloxane.

[0071] Example 8

[0072] The difference between Example 8 and Example 5 is that the active group-terminated polydimethylsiloxane is aminopropyl-diterminated polydimethylsiloxane.

[0073] Example 9

[0074] The difference between Example 9 and Example 5 is that the active group double-terminated polydimethylsiloxane is composed of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloxypropyl polydimethylsiloxane in a weight ratio of 1:1.2:3.

[0075] Example 10

[0076] The difference between Example 10 and Example 5 is that the active group double-terminated polydimethylsiloxane is composed of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloxypropyl polydimethylsiloxane in a weight ratio of 1:1.5:2.

[0077] Example 11

[0078] The difference between Example 11 and Example 5 is that the active group double-terminated polydimethylsiloxane is composed of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloxypropyl polydimethylsiloxane in a weight ratio of 1:1.8:1.

[0079] Example 12

[0080] The difference between Example 12 and Example 10 is that the fiber filler is aramid fiber.

[0081] Example 13

[0082] The difference between Example 13 and Example 10 is that the fiber filler is composed of polyetheretherketone fiber and aramid fiber in a weight ratio of 1:1.5.

[0083] Example 14

[0084] The difference between Example 14 and Example 13 is that both the silica and the fiber filler are surface-treated, and the specific process is as follows: weigh γ-aminopropyltriethoxysilane, a 50% ethanol solution by mass, and silica, stir at a speed of 100 r / min for 30 minutes, filter, and dry the filter residue at 80°C for 1 hour to obtain surface-treated silica; wherein the weight ratio of γ-aminopropyltriethoxysilane, 50% ethanol solution by mass, and silica is 1:5:10.

[0085] Weigh γ-aminopropyltriethoxysilane, a 50% ethanol solution by mass, and a fiber filler, stir them at 100 r / min for 30 min, filter, and dry the filter residue at 80°C for 1 h to obtain a surface-treated fiber filler; wherein the weight ratio of γ-aminopropyltriethoxysilane, the 50% ethanol solution by mass, and the fiber filler is 1:5:10.

[0086] Comparative Example

[0087] Comparative Example 1

[0088] The difference between Comparative Example 1 and Example 1 is that the active group di-terminated polydimethylsiloxane is replaced by an equal amount of 1,1,3,3,5,5-hexamethyltrisiloxane.

[0089] Comparative Example 2

[0090] The difference between Comparative Example 2 and Example 1 is that methyltriallylsilane is replaced by dodecafluoroheptyl methacrylate in an equal amount.

[0091] Comparative Example 3

[0092] The difference between Comparative Example 3 and Example 1 is that the active group double-terminated polydimethylsiloxane is replaced by methacryloyloxypropyl single-terminated dimethylpolysiloxane in equal amounts.

[0093] Comparative Example 4

[0094] The difference between Comparative Example 4 and Example 1 is that the fiber filler is replaced by white carbon black in equal amount.

[0095] Performance testing

[0096] Testing method / test method Mechanical properties: The high-compression and oxidation-resistant corrosion-resistant silicone rubber obtained in Examples 1-14 and Comparative Examples 1-4 was placed in a mold, and then placed in a flat vulcanizer. The vulcanization was carried out at a temperature of 160° C. for 5 minutes to obtain a test sample. The tensile strength and elongation at break of the test sample were tested according to ASTM D638;

[0097] Compression resistance: Examples 1-14 and Comparative Examples 1-4 were placed in an extruder for extrusion molding. Cross-linking and shaping were performed at a temperature of 160°C for 5 minutes to obtain a test tube with an inner diameter of 20 mm and an outer diameter of 25 mm, and a compression test was performed. The pressure test was performed using an air pressure device. The effective length of the test tube was 20 cm. One end of the test sample was sealed with a seal to prevent gas leakage, and the other end was filled with nitrogen to make the inside of the test tube reach a certain pressure. The pressure was tested in sequence at 3 MPa, 4.0 MPa, 5 MPa, 6 MPa, 7 MPa, 8 MPa, 9 MPa, and 10 MPa. The pressure was maintained for 5 minutes each time. If deformation, bursting, etc. occurred, the pressure of the corresponding deformation was recorded. If there was no change, the test pressure was increased and the test was continued until deformation, bursting, etc. occurred, and the corresponding pressure was recorded.

[0098] Anti-oxidation corrosion: Place the test sample in an environment with a temperature of 250℃, a pressure of 30MPa, and a hydrogen volume concentration of 50% for 7 days. Take it out and then test it according to the above-mentioned mechanical properties test method, and calculate the residual tensile strength and residual elongation at break. The residual rate is equal to the data after aging divided by the data before aging.

[0099] The above experiment was carried out 3 times and the average value was taken. The specific experimental data are shown in Table 2;

[0100] Table 2 Experimental data of Examples 1-14 and Comparative Examples 1-4

[0101]

[0102]

[0103] By comparing Example 1 and Comparative Examples 1-6, it can be seen that the elongation at break, tensile strength, compressive pressure, residual elongation at break, and residual tensile strength of Comparative Examples 1-6 are all lower than those of Example 1, indicating that the silicone rubber prepared by adopting the raw material system of the present application has better resistance to oxidation corrosion, compressive resistance, and mechanical properties, reducing the possibility of cracking in hydrogen-powered vehicles and improving its practicality.

[0104] By comparing Example 2 and Example 4, it can be seen that the elongation at break, tensile strength, compressive pressure, residual elongation at break, and residual tensile strength of Example 4 are all higher than those of Example 2, indicating that the compounding of methyl vinyl silicone rubber with a vinyl content of 0.08-0.17%, methyl vinyl silicone rubber with a vinyl content of 0.18-0.30%, and methyl vinyl silicone rubber with a vinyl content of 1.01-1.27 has better corrosion resistance and mechanical properties.

[0105] By comparing Example 5 and Example 10, it can be seen that the elongation at break, tensile strength, compressive pressure, residual elongation at break, and residual tensile strength of Example 10 are all higher than those of Example 5, indicating that the use of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloyloxypropyl polydimethylsiloxane has a synergistic effect, thereby enabling the silicone rubber to obtain better performance.

[0106] By comparing Example 13 with Example 10, it can be seen that the elongation at break, tensile strength, compressive pressure, residual elongation at break, and residual tensile strength of Example 13 are all higher than those of Example 10, indicating that the compounding of polyetheretherketone fiber and aramid fiber has a better synergistic effect, thereby making the performance of silicone rubber better.

[0107] By comparing Example 13 and Example 14, it can be seen that the elongation at break, tensile strength, compressive pressure, residual elongation at break, and residual tensile strength of Example 13 are all lower than those of Example 14, indicating that after the surface treatment of the present application, the surface-treated silica and surface-treated fiber filler obtained have better compatibility, further improving the physical properties of the silicone rubber.

[0108] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A high-pressure-resistant and anti-oxidation-corrosion silicone rubber, characterized in that: It is composed of the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber 1-8 parts of active group double-terminated polydimethylsiloxane 10-20 parts of 1,1,3,3,5,5-hexamethyltrisiloxane 1-5 parts of dodecafluoroheptyl methacrylate 3-5 parts of methyl triallylsilane 10-30 parts of white carbon black 5-15 parts fiber filler Catalyst A1-3 parts Catalyst B 0.01-0.03 parts Inhibitor 0.001-0.003 parts; The active group double-terminated polydimethylsiloxane is composed of one or more of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane, and double-terminated methacryloxypropyl polydimethylsiloxane; The preparation method of the high-pressure-resistant and oxidation-resistant silicone rubber comprises the following steps: Step 1: Weigh dodecafluoroheptyl methacrylate, methyl triallylsilane, inhibitor, and catalyst B in parts by weight, mix them evenly, and heat to react to obtain reactant C; and mix active group di-terminated polydimethylsiloxane, 1,1,3,3,5,5-hexamethyltrisiloxane, white carbon black, and fiber filler in parts by weight to obtain mixture D; Step 2: Weigh the methyl vinyl silicone rubber in parts by weight, and mix it evenly with all the reactants C and all the mixture D obtained in step 1 to obtain a mixed rubber E; Step 3: Evenly mix all the mixed rubber obtained in step 2 with catalyst A to obtain high-pressure-resistant and anti-oxidation-corrosion silicone rubber.

2. The high-pressure-resistant and anti-oxidation-corrosion silicone rubber according to claim 1, characterized in that: The methyl vinyl silicone rubber is composed of the following raw materials in parts by weight: 20-40 parts of methyl vinyl silicone rubber with a vinyl content of 0.08-0.17% 30-40 parts of methyl vinyl silicone rubber with a vinyl content of 0.18-0.30% 20-50 parts of methyl vinyl silicone rubber with a vinyl content of 1.01-1.27%.

3. The high-pressure-resistant and anti-oxidation-corrosion silicone rubber according to claim 1, characterized in that: The number average molecular weight of the methyl vinyl silicone rubber is 100,000-500,000.

4. The high-pressure-resistant and anti-oxidation-corrosion silicone rubber according to claim 1, characterized in that: The number average molecular weight of the active group double-terminated polydimethylsiloxane is 5000-8000.

5. The high-pressure-resistant and anti-oxidation-corrosion silicone rubber according to claim 1, characterized in that: The active group double-terminated polydimethylsiloxane is composed of hydroxyl double-terminated polydimethylsiloxane, aminopropyl double-terminated polydimethylsiloxane and double-terminated methacryloxypropyl polydimethylsiloxane in a weight ratio of 1: (1.2-1.8): (1-3).

6. The high-pressure-resistant and oxidation-resistant silicone rubber according to claim 1, characterized in that: The fiber filler is polyetheretherketone fiber and / or aramid fiber.

7. The high-pressure-resistant and anti-oxidation-corrosion silicone rubber according to claim 1, characterized in that: The catalyst A is a platinum catalyst or a dipentadienyl vulcanizing agent.

8. The high-pressure-resistant and oxidation-resistant silicone rubber according to claim 1, characterized in that: The catalyst B is benzoyl peroxide; the inhibitor is p-hydroxyanisole.

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