Silicone rubber with ultra-high resilience and preparation method thereof

Abstract

The present invention provides a silicone rubber with ultra-high resilience and a preparation method thereof. The silicone rubber with ultra-high resilience comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-35 parts of fumed silica, 5-10 parts of hydroxy vinyl silicone oil, 0-5 parts of vinyl silicone oil, and 1-1.4 parts of a vulcanizing agent. The rebound is not only improved, with a rebound rate of more than 80%, but also the dynamic performance of the formula is improved, with a zigzag crack of more than 10 million times.

Description

Technical Field

[0001] The invention relates to the field of silicone rubber, and in particular to silicone rubber with ultra-high resilience and a preparation method thereof. Background Art

[0002] Silicone rubber is a polymer elastomeric material composed of siloxane chains, with a main chain structure of Si-O units, and side chains are usually connected to organic groups such as methyl and vinyl. Silicone rubber has unique inorganic and organic dual characteristics, which makes it excellent in heat resistance, cold resistance, chemical stability, electrical insulation, wear resistance and weather resistance. There are many kinds of silicone rubber performance on the market, but the rebound performance of the mixed rubber is mostly 70% or less. For example, the maximum rebound in the patent document with publication number CN106633910A is 65%; the maximum rebound in the patent document with publication number CN108129850A is 75%, while the present invention can increase the rebound to 80% or more, and has excellent dynamic performance that they do not have. Summary of the invention

[0003] To solve the above problems, the present invention provides a silicone rubber with ultra-high resilience and a preparation method thereof, which not only improves the rebound, with a rebound rate of more than 80%, but also improves the dynamic performance of the formula, with a zigzag crack that can last more than 10 million times.

[0004] The object of the present invention is achieved in the following manner: a silicone rubber with ultra-high resilience, comprising the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 25 to 35 parts of fumed silica, 5 to 10 parts of hydroxy vinyl silicone oil, 0 to 5 parts of vinyl silicone oil, and 1 to 1.4 parts of a vulcanizing agent.

[0005] The methyl vinyl silicone rubber is a vinyl terminated methyl vinyl silicone rubber, which is compounded by a vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.19% to 0.24% and a molecular weight of 600,000 to 700,000 and a vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.13% to 0.18% and a molecular weight of 600,000 to 700,000 in a mass ratio of (50-100): (0-50).

[0006] The specific surface area of ​​fumed silica is 200~450m 2 / g.

[0007] The specific surface area of ​​fumed silica is 200±20m 2 / g.

[0008] Hydroxy vinyl silicone oil is a hydroxyl-terminated vinyl silicone oil with a viscosity of ≤50 mm 2 ∕S, vinyl content is 6-8%, hydroxyl content is ≥6%.

[0009] The viscosity of ethylene silicone oil is 100~5000mpa.s (25℃), and the vinyl content is 0.1~1.2%.

[0010] The vulcanizing agent is a vulcanizing agent with a 50% content of di-2,5, and specifically is a mixture of 2,5-dimethyl-2,5-bis-(tert-butylperoxy)hexane and methyl vinyl silicone rubber raw rubber with a molecular weight of 500,000 in a ratio of 1:1.

[0011] The method for preparing silicone rubber with ultra-high resilience comprises the following steps: 1) Mix methyl vinyl silicone rubber, hydroxy vinyl silicone oil and vinyl silicone oil in a kneader; 2) adding fumed silica to the material obtained in step 1), wherein the amount of fumed silica added four times is 25±3%, 25±3%, 25±3%, and 25±3% respectively, and the sum of the four times is 100%. After the addition is completed, stirring and kneading at normal pressure and temperature of 60°C to 80°C to form a mass, and kneading is continued for 10 to 30 minutes after the mass is formed; 3) heating the material obtained in step 2) to 100° C. to 120° C., mixing for 1.5±0.2 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooling and standing for 24±2 h to obtain a rubber compound; 4) The mixed rubber obtained in step 3) is mixed with a vulcanizing agent, first vulcanized at 175±5° C. for 15±1 minutes, and then vulcanized at 200±5° C. for 2±1 hours to obtain a silicone rubber with ultra-high resilience.

[0012] Compared with the prior art, the silicone rubber with ultra-high rebound performance provided by the present invention significantly improves the rebound resilience of the silicone rubber after vulcanization, and the addition of small molecule vinyl silicone oil not only improves the rebound, but also improves the dynamic performance of the formula. The preparation method is simple and easy to operate. DETAILED DESCRIPTION

[0013] The present invention is described in detail below in conjunction with specific embodiments. It is necessary to point out that this embodiment is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical personnel skilled in the art can make some non-essential improvements and adjustments based on the above-mentioned contents of the present invention.

[0014] A silicone rubber with ultra-high resilience comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-35 parts of fumed silica, 5-10 parts of hydroxy vinyl silicone oil, 0-5 parts of vinyl silicone oil and 1-1.4 parts of a vulcanizing agent.

[0015] The methyl vinyl silicone rubber is a vinyl terminated methyl vinyl silicone rubber, which is compounded by a vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.19% to 0.24% and a molecular weight of 600,000 to 700,000 and a vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.13% to 0.18% and a molecular weight of 600,000 to 700,000 in a mass ratio of (50-100): (0-50).

[0016] The vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.19% to 0.24% and a molecular weight of 600,000 to 700,000 is 110-3 B type methyl vinyl silicone rubber, and the vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.13% to 0.18% and a molecular weight of 600,000 to 700,000 is 110-2B type methyl vinyl silicone rubber.

[0017] The specific surface area of ​​fumed silica is 200~450m 2 / g.

[0018] The specific surface area of ​​fumed silica is 200±20m 2 / g.

[0019] Hydroxy vinyl silicone oil is a hydroxyl-terminated vinyl silicone oil with a viscosity of ≤50 mm 2 ∕S, vinyl content is 6-8%, hydroxyl content is ≥6%.

[0020] The viscosity of ethylene silicone oil is 100~5000mpa.s (25℃), and the vinyl content is 0.1~1.2%.

[0021] The vulcanizing agent is a vulcanizing agent with a 50% content of di-2,5, and specifically is a mixture of 2,5-dimethyl-2,5-bis-(tert-butylperoxy)hexane and methyl vinyl silicone rubber raw rubber with a molecular weight of 500,000 in a ratio of 1:1.

[0022] The method for preparing silicone rubber with ultra-high resilience comprises the following steps: 1) Mix methyl vinyl silicone rubber, hydroxy vinyl silicone oil and vinyl silicone oil in a kneader; 2) adding fumed silica to the material obtained in step 1), wherein the amount of fumed silica added four times is 25±3%, 25±3%, 25±3%, and 25±3% respectively, and the sum of the four times is 100%. After the addition is completed, stirring and kneading at normal pressure and temperature of 60°C to 80°C to form a mass, and kneading is continued for 10 to 30 minutes after the mass is formed; 3) heating the material obtained in step 2) to 100° C. to 120° C., mixing for 1.5±0.2 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooling and standing for 24±2 h to obtain a rubber compound; 4) The mixed rubber obtained in step 3) is mixed with a vulcanizing agent, first vulcanized at 175±5° C. for 15±1 minutes, and then vulcanized at 200±5° C. for 2±1 hours to obtain a silicone rubber with ultra-high resilience.

[0023] At present, the silicone rubber industry promotes the dispersion of reinforcing fillers in silicone rubber by adding a large amount of hydroxy silicone oil, vinyl silicone oil or other lubricants. However, low-viscosity silicone oil and other lubricants such as silicone powder, although conducive to the dispersion of reinforcing filler white carbon black, will increase the friction between silicone molecules, the friction between lubricants and white carbon black, and the friction between lubricants and silicone rubber. The increase in internal friction will absorb the energy of the test rebound tester's hammer, and the rebound will be reduced.

[0024] The principle of the present invention is to reduce the number of reinforcing filler white carbon black, and the appropriate reduction of filler can reduce the friction between filler particles; by using fumed white carbon black as reinforcement, the particle size of fumed white carbon black is smaller, which can be better combined with silicone rubber raw rubber to generate more bonding glue; using hydroxy vinyl silicone oil to treat white carbon black, so that white carbon black is evenly dispersed, and in addition, hydroxy vinyl silicone oil contains a large amount of vinyl, which can increase the cross-linking density of the formula, thereby increasing the rebound; the addition of small molecule ethylene silicone oil increases a certain tear resistance while also increasing the cross-linking density, thereby increasing the rebound performance; in addition, the addition of vinyl silicone oil, vinyl-terminated methyl vinyl silicone rubber with a vinyl molar content of 0.19% to 0.24% and a molecular weight of 600,000 to 700,000 and vinyl-terminated methyl vinyl silicone rubber with a vinyl molar content of 0.13% to 0.18% and a molecular weight of 600,000 to 700,000 is mixed with methyl vinyl silicone rubber, which changes the cross-linking structure of the silicone molecules and significantly improves the dynamic performance of the formula. The synergistic effect between the various material components selected in this application is obvious, which greatly improves the rebound resilience of the formula.

[0025] The raw materials used in the following Examples and Comparative Examples in Table 1 are all commercially available products.

[0026] Table 1 In the actual experiment, the methyl vinyl silicone rubber with a vinyl content of 0.19% to 0.24% used in the embodiment has a vinyl content of 0.20% and a molecular weight of 600,000 after quality inspection; the methyl vinyl silicone rubber with a vinyl content of 0.13% to 0.18% has a vinyl content of 0.16% and a molecular weight of 600,000 after quality inspection. Therefore, the quality inspection data is written in the embodiment.

[0027] Example 1 A silicone rubber with ultra-high resilience is prepared by adding, in parts by mass, 100 parts of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.20% and 8 parts of a 40 mm viscosity silicone rubber in a vacuum kneader. 2 ∕S of hydroxy vinyl silicone oil was mixed evenly in a kneader; the vinyl content of the hydroxy vinyl silicone oil was 6% and the hydroxyl content was 8%.

[0028] 2) Add 25 parts of a 200 ± 20 m 2 / g of fumed silica, the silica is added in four portions, the addition amount is 25%, 25%, 25%, 25% in sequence, after the materials are added, at normal pressure and temperature of 70°C, stirred and kneaded to form a mass, and kneaded for 20 minutes after the mass is formed to obtain a rubber material. In the present invention, normal pressure refers to standard atmospheric pressure.

[0029] 3) The rubber obtained in step 2) is heated to 120° C., and is mixed for 1.5 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooled and allowed to stand for 24 h to obtain a rubber mix.

[0030] 4) Add 1.3 parts of dichloropentane vulcanizing agent (50% dichloropentane content) to the mixed rubber obtained in step 3) and mix them evenly in an open mixer. First, vulcanize them at 175° C. for 15 minutes, and then vulcanize them at 200° C. for 2 hours to obtain silicone rubber with ultra-high resilience.

[0031] In the present invention, the 50% content of bis(2,5-dimethyl)-2,5-bis(tert-butylperoxy)hexane is a mixture of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane and methyl vinyl silicone rubber raw rubber with a molecular weight of 500,000 according to a mass ratio of 1:1.

[0032] The present invention performs performance tests on the obtained silicone rubber composition with ultra-high resilience, and the results are shown in Table 1.

[0033] Example 2 A silicone rubber with ultra-high resilience is prepared by adding 100 parts by weight of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.20% and 10 parts by weight of a 40 mm thick silicone rubber with a viscosity of 40 mm in a vacuum kneader. 2 ∕S of hydroxy vinyl silicone oil was mixed evenly in a kneader; the vinyl content of the hydroxy vinyl silicone oil was 6% and the hydroxyl content was 8%.

[0034] 2) Add 30 parts of a granular material with a specific surface area of ​​450±30m2 in step 1) 2 / g of fumed silica, which is added in four portions in amounts of 25%, 25%, 25%, and 25% respectively. After the materials are added, they are stirred and kneaded at normal pressure and 70°C to form a mass. After agglomeration, kneading is continued for 20 minutes to obtain a rubber compound.

[0035] 3) The rubber obtained in step 2) is heated to 120° C., and is mixed for 1.5 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooled and allowed to stand for 24 h to obtain a rubber mix.

[0036] 4) Add 1.4 parts of dichloropentane vulcanizing agent (50% dichloropentane content) to the mixed rubber obtained in step 3) and mix them evenly in an open mixer. First, vulcanize them at 175° C. for 15 minutes, and then vulcanize them at 200° C. for 2 hours to obtain silicone rubber with ultra-high resilience.

[0037] The present invention performs performance tests on the obtained silicone rubber composition with ultra-high resilience, and the results are shown in Table 1.

[0038] Example 3 A silicone rubber with ultra-high resilience is prepared by adding 100 parts by weight of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.20% and 5 parts by weight of a 40 mm thick silicone rubber in a vacuum kneader. 2 ∕S, hydroxy vinyl silicone oil with a vinyl content of 6% and a hydroxyl content of 8%, and 5 parts of vinyl silicone oil with a viscosity of 100mPa.s and a vinyl content of 1.0% are mixed evenly in a kneader.

[0039] 2) Add 30 parts of a 200 ± 20 m 2 / g of fumed silica, which is added in four portions in amounts of 25%, 25%, 25%, and 25% respectively. After the materials are added, they are stirred and kneaded at normal pressure and 70°C to form a mass. After agglomeration, kneading is continued for 20 minutes to obtain a rubber compound.

[0040] 3) The rubber obtained in step 2) is heated to 120° C., and is mixed for 1.5 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooled and allowed to stand for 24 h to obtain a rubber mix.

[0041] 4) Add 1.2 parts of dichloropentane vulcanizing agent (50% dichloropentane content) to the mixed rubber obtained in step 3) and mix them evenly in an open mixer. First, vulcanize them at 175° C. for 15 minutes, and then vulcanize them at 200° C. for 2 hours to obtain silicone rubber with ultra-high resilience.

[0042] The present invention performs performance tests on the obtained silicone rubber composition with ultra-high resilience, and the results are shown in Table 1.

[0043] Example 4 A silicone rubber with ultra-high resilience is prepared by adding, in parts by mass, 50 parts of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.20% and 50 parts of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.16% in a vacuum kneader, and 5 parts of a vinyl-terminated methyl vinyl silicone rubber with a viscosity of 40 mm 2 ∕S, hydroxy vinyl silicone oil with a vinyl content of 6% and a hydroxyl content of 8%, and 5 parts of vinyl silicone oil with a viscosity of 5000mpa.s and a vinyl content of 0.12% are mixed evenly in a kneader.

[0044] 2) Add 30 parts of a 200 ± 20 m 2 / g of fumed silica, which is added in four portions in amounts of 25%, 25%, 25%, and 25% respectively. After the materials are added, they are stirred and kneaded at normal pressure and 70°C to form a mass. After agglomeration, kneading is continued for 20 minutes to obtain a rubber compound.

[0045] 3) The rubber obtained in step 2) is heated to 120° C., and is mixed for 1.5 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooled and allowed to stand for 24 h to obtain a rubber mix.

[0046] 4) Add 1.4 parts of dichloropentane vulcanizing agent (50% dichloropentane content) to the mixed rubber obtained in step 3) and mix them evenly in an open mixer. First, vulcanize them at 175° C. for 15 minutes, and then vulcanize them at 200° C. for 2 hours to obtain silicone rubber with ultra-high resilience.

[0047] The present invention performs performance tests on the obtained silicone rubber composition with ultra-high resilience, and the results are shown in Table 1.

[0048] Example 5 A silicone rubber with ultra-high resilience is prepared by adding 100 parts by weight of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.20% and 5 parts by weight of a 40 mm thick silicone rubber in a vacuum kneader. 2 ∕S, hydroxy vinyl silicone oil with a vinyl content of 6% and a hydroxyl content of 8% are mixed evenly in a kneader.

[0049] 2) Add 35 parts of a 200 ± 20 m 2 / g of fumed silica, which is added in four portions in amounts of 25%, 25%, 25%, and 25% respectively. After the materials are added, they are stirred and kneaded at normal pressure and 70°C to form a mass. After agglomeration, kneading is continued for 20 minutes to obtain a rubber compound.

[0050] 3) The rubber obtained in step 2) is heated to 120° C., and is mixed for 1.5 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooled and allowed to stand for 24 h to obtain a rubber mix.

[0051] 4) Add 1.35 parts of dichloropentane vulcanizing agent (50% dichloropentane content) to the mixed rubber obtained in step 3) and mix them evenly in an open mixer. First, vulcanize them at 175° C. for 15 minutes, and then vulcanize them at 200° C. for 2 hours to obtain silicone rubber with ultra-high resilience.

[0052] The present invention performs performance tests on the obtained silicone rubber composition with ultra-high resilience, and the results are shown in Table 1.

[0053] Example 6 A silicone rubber with ultra-high resilience is prepared by adding 100 parts by weight of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.20% and 5 parts by weight of a 40 mm thick silicone rubber in a vacuum kneader. 2 ∕S, hydroxy vinyl silicone oil with a vinyl content of 6% and a hydroxyl content of 8%, and 3 parts of vinyl silicone oil with a viscosity of 100mPa.s and a vinyl content of 1.0% are mixed evenly in a kneader.

[0054] 2) Add 30 parts of a 200 ± 20 m 2 / g of fumed silica, which is added in four portions in amounts of 25%, 25%, 25%, and 25% respectively. After the materials are added, they are stirred and kneaded at normal pressure and 70°C to form a mass. After agglomeration, kneading is continued for 20 minutes to obtain a rubber compound.

[0055] 3) The rubber obtained in step 2) is heated to 120° C., and is mixed for 1.5 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooled and allowed to stand for 24 h to obtain a rubber mix.

[0056] 4) Add 1.35 parts of dichloropentane vulcanizing agent (50% dichloropentane content) to the mixed rubber obtained in step 3) and mix them evenly in an open mixer. First, vulcanize them at 175° C. for 15 minutes, and then vulcanize them at 200° C. for 2 hours to obtain silicone rubber with ultra-high resilience.

[0057] The present invention performs performance tests on the obtained silicone rubber composition with ultra-high resilience, and the results are shown in Table 1.

[0058] Example 7 A silicone rubber with ultra-high resilience is prepared by adding 100 parts by weight of vinyl-terminated methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl molar content of 0.20% and 5 parts by weight of a 40 mm thick silicone rubber in a vacuum kneader. 2 ∕S, hydroxy vinyl silicone oil with a vinyl content of 6% and a hydroxyl content of 8%, and 3 parts of vinyl silicone oil with a viscosity of 5000mPa.s and a vinyl content of 0.12% are mixed evenly in a kneader.

[0059] 2) Add 30 parts of a 200 ± 20 m 2 / g of fumed silica, which is added in four portions in amounts of 25%, 25%, 25%, and 25% respectively. After the materials are added, they are stirred and kneaded at normal pressure and 70°C to form a mass. After agglomeration, kneading is continued for 20 minutes to obtain a rubber compound.

[0060] 3) The rubber obtained in step 2) is heated to 120° C., and is mixed for 1.5 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooled and allowed to stand for 24 h to obtain a rubber mix.

[0061] 4) Add 1.35 parts of dichloropentane vulcanizing agent (50% dichloropentane content) to the mixed rubber obtained in step 3) and mix them evenly in an open mixer. First, vulcanize them at 175° C. for 15 minutes, and then vulcanize them at 200° C. for 2 hours to obtain silicone rubber with ultra-high resilience.

[0062] The present invention performs performance tests on the obtained silicone rubber composition with ultra-high resilience, and the results are shown in Table 2.

[0063] Table 2 Ultra-high elastic silicone rubber performance test The test methods are: GB / T 531.1-2008 Vulcanized rubber or thermoplastic rubber indentation hardness test method Part 1: Shore hardness method (Shore hardness), GB / T 528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber, GB / T 1681-2009 Determination of rebound resilience of vulcanized rubber, GB / T 13934-2006 Determination of flex cracking and crack growth of vulcanized rubber or thermoplastic rubber (Demethea type).

[0064] As shown in Table 1, the present invention provides a super-high resilience silicone rubber formula, the resilience of which reaches more than 80%. The addition of small molecule vinyl silicone oil not only improves the resilience performance, but also improves the dynamic performance (torque crack).

[0065] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for those skilled in the art and any technician familiar with the technical field, without departing from the overall concept of the present invention, the technical solution and the inventive concept of the present invention are equivalently replaced or changed, and several changes and improvements are made, which should also be regarded as the protection scope of the present invention.

Claims

1. A silicone rubber with ultra-high resilience, characterized in that: The invention comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-35 parts of fumed silica, 5-10 parts of hydroxy vinyl silicone oil, 0-5 parts of vinyl silicone oil and 1-1.4 parts of vulcanizing agent.

2. The silicone rubber with ultra-high resilience according to claim 1, characterized in that: The methyl vinyl silicone rubber is a vinyl terminated methyl vinyl silicone rubber, which is compounded by a vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.19% to 0.24% and a molecular weight of 600,000 to 700,000 and a vinyl terminated methyl vinyl silicone rubber with a vinyl molar content of 0.13% to 0.18% and a molecular weight of 600,000 to 700,000 in a mass ratio of (50-100): (0-50).

3. The silicone rubber with ultra-high resilience according to claim 1, characterized in that: The specific surface area of ​​fumed silica is 200~450m 2 / g.

4. The silicone rubber with ultra-high resilience according to claim 3, characterized in that: The specific surface area of ​​fumed silica is 200±20m 2 / g.

5. The silicone rubber with ultra-high resilience according to claim 1, characterized in that: Hydroxy vinyl silicone oil is a hydroxyl-terminated vinyl silicone oil with a viscosity of ≤50 mm 2 ∕S, vinyl content is 6-8%, hydroxyl content is ≥6%.

6. The silicone rubber with ultra-high resilience according to claim 1, characterized in that: The viscosity of ethylene silicone oil is 100~5000mpa.s (25℃), and the vinyl content is 0.1~1.2%.

7. The silicone rubber with ultra-high resilience according to claim 1, characterized in that: The vulcanizing agent is a vulcanizing agent with a 50% content of di-2,5, and specifically is a mixture of 2,5-dimethyl-2,5-bis-(tert-butylperoxy)hexane and methyl vinyl silicone rubber raw rubber with a molecular weight of 500,000 in a ratio of 1:

1.

8. The method for preparing the silicone rubber with ultra-high resilience according to any one of claims 1 to 7, characterized in that: The following steps are involved: 1) Mix methyl vinyl silicone rubber, hydroxy vinyl silicone oil and vinyl silicone oil in a kneader; 2) adding fumed silica to the material obtained in step 1), wherein the amount of fumed silica added four times is 25±3%, 25±3%, 25±3%, and 25±3% respectively, and the sum of the four times is 100%. After the addition is completed, stirring and kneading at normal pressure and temperature of 60°C to 80°C to form a mass, and kneading is continued for 10 to 30 minutes after the mass is formed; 3) heating the material obtained in step 2) to 100° C. to 120° C., mixing for 1.5±0.2 h under a vacuum degree of -0.8 MPa to -0.9 MPa, and then cooling and standing for 24±2 h to obtain a rubber compound; 4) The mixed rubber obtained in step 3) is mixed with a vulcanizing agent, first vulcanized at 175±5° C. for 15±1 minutes, and then vulcanized at 200±5° C. for 2±1 hours to obtain a silicone rubber with ultra-high resilience.

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