High-oil-content self-oil-separating silicone rubber and preparation method thereof

Abstract

The invention belongs to the technical field of silicone rubber, and particularly discloses high-oil-content self-oil-separating silicone rubber which comprises 160-200 parts of mixed methyl vinyl raw rubber, 45-65 parts of fumed silica, 50-65 parts of phenyl silicone oil, 45-56 parts of Dow Corning hydroxyl silicone oil, 5-10 parts of methoxy silicone oil refined hydroxyl silicone oil, 0.3-0.38 part of stearic acid and 0.38-0.45 part of zinc oxide. A product vulcanized by the silicone rubber disclosed by the invention is quick in oil output and large in oil output, the singleness of a self-lubricating product in terminal application and production is improved, the convenience is improved, and the silicone rubber with other hardness or different properties can be more flexibly doped so as to achieve the final use purpose. The invention further provides a preparation method of the high-oil-content self-oil-separating silicone rubber, and the preparation method is simple, wide in raw material source and suitable for large-scale production.

Description

Technical Field

[0001] The invention belongs to the technical field of silicone rubber, and particularly relates to a self-oiling silicone rubber with a high oil content and a preparation method thereof. Background Art

[0002] Silicone rubber boasts numerous excellent properties, including excellent resistance to high and low temperatures, ozone, weathering, insulation, and production inertness, and is widely used in various fields. However, after vulcanization, silicone rubber products exhibit a high coefficient of friction, making them susceptible to damage from friction or adhesion, making assembly difficult. Manually applying silicone oil to silicone products is commonly used to reduce friction, but this method is inefficient and costly, and the applied silicone oil evaporates quickly, making it unsuitable for long-term storage. Furthermore, silicone products swell when exposed to silicone oil, increasing their volume and making assembly difficult or shortening their service life.

[0003] Currently, the market for self-lubricating silicone rubber is quite complex. Some companies directly soak conventional silicone in oil and use it as self-lubricating silicone, while others directly fill the silicone with large amounts of silicone oil during mixing, causing the silicone oil to saturate the formula and precipitate on the surface. These practices can easily cause the silicone product to swell and deform in the later stages. Furthermore, it is difficult to control the timing and amount of oil release from the silicone, resulting in difficulty in controlling the stability of the product between different batches. Furthermore, the oil release rate of self-lubricating silicone rubber must be maintained above a certain percentage. If it is too low, the silicone rubber raw material or product will easily become dry and astringent during transportation and use, with insufficient oil release, failing to meet usage requirements, and even posing a major accident hazard. The self-oiling silicone rubber on the market mainly needs to adjust the oiling rate and oil output through the additive masterbatch formula. The oiling rate is generally 5%-7%. Each formula only meets one performance requirement, but different application scenarios have more refined requirements for sustained-release effect, lubrication durability and other properties. If you want to achieve certain performance changes, you can only readjust the ratio of raw rubber, white carbon black and additives to re-feed, re-mix and re-refine. The whole cycle is long and the cost of machines and labor is high.

[0004] Therefore, the research and development of high oil content self-oiling silicone rubber products is of great positive significance. Summary of the Invention

[0005] The present invention aims to provide a high-oil content, self-lubricating silicone rubber. After vulcanization, this silicone rubber product releases oil quickly and in large quantities, improving the simplicity and convenience of self-lubricating products during end-use production. It also allows for the flexible incorporation of silicone rubbers with different hardness or properties to achieve the desired end-use. The present invention also provides a method for preparing this high-oil content, self-lubricating silicone rubber. This method is simple, utilizes a wide range of raw materials, and is suitable for large-scale production.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A self-oiling silicone rubber with high oil content comprises the following components in parts by weight:

[0008]

[0009] Furthermore, it is preferred that the high oil content self-oiling silicone rubber comprises the following components in parts by weight:

[0010]

[0011]

[0012] In the present invention, the mixed methyl vinyl raw rubber is prepared by compounding 110-3s and 110-7s from Nanjing Dongjue Sales Co., Ltd. in a weight ratio of (0.1-0.3):1.

[0013] The fumed silica was QS-102 from Tokuyama, Japan.

[0014] The Dow Corning hydroxy silicone oil uses PMX-0930 from Dow Silicones; the hydroxy silicone oil uses the general-purpose hydroxy silicone oil from Huizhou Tianyi Environmental Protection Materials Co., Ltd.

[0015] The phenyl silicone oil used was phenyl silicone oil 6005A produced by Foshan Chuying Chemical Co., Ltd.

[0016] The stearic acid used was produced by Azelis International Trading (Shanghai) Co., Ltd.

[0017] The zinc oxide used was that produced by Taizhou Huaye Zinc Industry Co., Ltd.

[0018] In the present invention, the reaction between stearic acid and zinc oxide in rubber processing generates zinc soap, the core functions of which are: 1) Activating the vulcanization system - zinc soap, as an intermediate, can form a soluble complex with the vulcanization accelerator, promote the activation of sulfur, and thus accelerate the vulcanization reaction process; 2) Optimizing the cross-linking structure - zinc soap chelates with the polysulfide bonds in the rubber molecules, protecting weak bonds and promoting the formation of short and stable cross-links, thereby improving the cross-linking density and mechanical properties (such as hardness and tensile stress) of the vulcanized rubber; 3) Improving rubber properties - such as aging resistance and processing performance: zinc soap can consume hydrogen sulfide (H2S) generated during the vulcanization process, reducing its damage to the rubber network, while repairing broken sulfur bonds, extending the service life, and also has a lubricating effect, improving filler dispersion, reducing the phenomenon of rubber material sticking to the roller, and assisting in demolding; 4) The importance of dosage control - the ratio of stearic acid to zinc oxide must be strictly controlled, and the weight ratio of zinc oxide to stearic acid is usually (1-5):1. Excessive stearic acid may cause zinc soap to precipitate (bloom), affecting the appearance and bonding performance. In the present invention, the preferred weight ratio of zinc oxide to stearic acid is (1-1.5):1.

[0019] The present invention also provides a method for preparing high-oil content self-oiling silicone rubber, which mainly comprises the following steps:

[0020] S1 powder glue

[0021] The powder feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times. The number of times each component is added is 4-5 times. After each addition, mix for 10-15 minutes. After the powdered white carbon black, hydroxy silicone oil, Dow Corning hydroxy silicone oil and phenyl silicone oil are added, add stearic acid and zinc oxide. After forming a mass, continue kneading for 15-25 minutes.

[0022] S2 Internal Mixing

[0023] Take it out and place it for 5 to 6 hours before kneading. Start timing from 120℃, open the lid and knead for 20 to 40 minutes. The high temperature treatment temperature should be controlled between 165 and 195℃.

[0024] S3 glue stirring

[0025] Stir the qualified rubber material into a large ball with smooth surface, then filter it.

[0026] In the present invention, the specific steps of adding hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black in S1 in multiple times are as follows:

[0027] First, add 8-12 parts of fumed silica, 0.5-1.5 parts of refined hydroxy silicone oil, 4-6 parts of Dow Corning hydroxy silicone oil, and 4-6 parts of phenyl silicone oil; mix for 10-15 minutes;

[0028] Add 12-18 parts of fumed silica, 0.5-1.5 parts of refined hydroxy silicone oil, 8-10 parts of Dow Corning hydroxy silicone oil, and 8-12 parts of phenyl silicone oil for the second time; mix for 10-15 minutes;

[0029] Add 12-18 parts of fumed silica, 1.5-2.5 parts of refined hydroxy silicone oil, 12-16 parts of Dow Corning hydroxy silicone oil, and 14-18 parts of phenyl silicone oil for the third time; mix for 10-15 minutes;

[0030] Add the remaining fumed silica, 1.5-2.5 parts of refined hydroxy silicone oil, 12-16 parts of Dow Corning hydroxy silicone oil, and 14-18 parts of phenyl silicone oil for the fourth time; mix for 10-15 minutes;

[0031] Add the remaining refined hydroxy silicone oil, Dow Corning hydroxy silicone oil, and phenyl silicone oil for the fifth time, and then add stearic acid and zinc oxide; after the hydroxy silicone oil, Dow Corning hydroxy silicone oil, and phenyl silicone oil are added to form a dough, continue kneading for 15 to 25 minutes.

[0032] Furthermore, the steps of powdering the glue in S1 are preferably as follows:

[0033] The feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times, as follows:

[0034] First add 10 parts of fumed silica, 1 part of refined hydroxy silicone oil, 5 parts of Dow Corning hydroxy silicone oil, and 5 parts of phenyl silicone oil; mix for 10-15 minutes;

[0035] Add 15 parts of fumed silica, 1 part of refined hydroxy silicone oil, 9 parts of Dow Corning hydroxy silicone oil, and 10 parts of phenyl silicone oil for the second time; mix for 10 to 15 minutes;

[0036] Add 15 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 14 parts of Dow Corning hydroxy silicone oil, and 16 parts of phenyl silicone oil for the third time; mix for 10 to 15 minutes;

[0037] The fourth time, 15 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 14 parts of Dow Corning hydroxy silicone oil, and 16 parts of phenyl silicone oil were added; mixed for 10 to 15 minutes;

[0038] The fifth time, 1 part of refined hydroxy silicone oil, 8 parts of Dow Corning hydroxy silicone oil, and 10 parts of phenyl silicone oil were added;

[0039] After adding the powdered silica, hydroxy silicone oil, Dow Corning hydroxy silicone oil and phenyl silicone oil, add 0.35 parts of stearic acid and 0.4 parts of zinc oxide; after forming a mass, continue kneading for 15 to 25 minutes.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The high-oil-content self-oiling silicone rubber products of the present invention have fast oil output and large oil output after vulcanization, which improves the problems of poor sealing effect and short service life of silicone rubber. This kind of silicone rubber is used as a masterbatch in combination with precipitation or vapor phase glue, which can more flexibly meet customers' different performance requirements for silicone rubber products, and achieve faster, more efficient and convenient adjustment of hardness, oil extraction rate and other properties, reduce costs, and at the same time have good sealing and aging resistance, smooth hand feel, relatively high surface finish, relatively flat surface, improved wear resistance, small deformation, strong adhesion, low viscosity-temperature coefficient, high compression resistance, and can be used for a long time at -50°C to 180°C, providing strong support for the safe and stable use of equipment, and providing great convenience for process operation. It is widely used in the manufacture of lubricating silicone products such as auto parts threaders, seals, pump plugs, hydraulic plugs, miscellaneous parts and customer-customized silicone rubber products. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to specific embodiments, but is not limited thereto.

[0043] A high-oil-content self-oiling silicone rubber according to an embodiment of the present invention comprises the following components in parts by weight:

[0044]

[0045] Among them: the mixed methyl vinyl raw rubber is compounded by 110-3s and 110-7s of Nanjing Dongjue Sales Co., Ltd. in a weight ratio of (0.1~0.3):1; the fumed silica is QS-102 from Tokuyama, Japan; the Dow Corning hydroxy silicone oil is PMX-0930 from Dow Silicones; the hydroxy silicone oil is the general-purpose hydroxy silicone oil from Huizhou Tianyi Environmental Protection Materials Co., Ltd.; the phenyl silicone oil is phenyl silicone oil 6005A from Foshan Chuying Chemical Co., Ltd.; the stearic acid is the stearic acid produced by Azelis International Trade (Shanghai) Co., Ltd.; and the zinc oxide is the zinc oxide from Taizhou Huaye Zinc Industry Co., Ltd.

[0046] The present invention also provides a method for preparing a high-oil content self-oiling silicone rubber in a specific embodiment, which is as follows:

[0047] S1 powder glue

[0048] The feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times. The number of times each component is added is 4-5 times, as follows:

[0049] First, add 8-12 parts of fumed silica, 0.5-1.5 parts of refined hydroxy silicone oil, 4-6 parts of Dow Corning hydroxy silicone oil, and 4-6 parts of phenyl silicone oil; mix for 10-15 minutes;

[0050] Add 12-18 parts of fumed silica, 0.5-1.5 parts of refined hydroxy silicone oil, 8-10 parts of Dow Corning hydroxy silicone oil, and 8-12 parts of phenyl silicone oil for the second time; mix for 10-15 minutes;

[0051] Add 12-18 parts of fumed silica, 1.5-2.5 parts of refined hydroxy silicone oil, 12-16 parts of Dow Corning hydroxy silicone oil, and 14-18 parts of phenyl silicone oil for the third time; mix for 10-15 minutes;

[0052] Add the remaining fumed silica, 1.5-2.5 parts of refined hydroxy silicone oil, 12-16 parts of Dow Corning hydroxy silicone oil, and 14-18 parts of phenyl silicone oil for the fourth time; mix for 10-15 minutes;

[0053] Add the remaining refined hydroxy silicone oil, Dow Corning hydroxy silicone oil, and phenyl silicone oil for the fifth time, and then add stearic acid and zinc oxide; after the hydroxy silicone oil, Dow Corning hydroxy silicone oil, and phenyl silicone oil are added to form a dough, continue kneading for 15 to 25 minutes.

[0054] S2 Internal Mixing

[0055] Take it out and place it for 5 to 6 hours before kneading. Start timing from 120℃, open the lid and knead for 20 to 40 minutes. The high temperature treatment temperature should be controlled between 165 and 195℃.

[0056] S3 glue stirring

[0057] Stir the qualified rubber material into a large ball with smooth surface, then filter it.

[0058] In this specific embodiment, S1 powder glue includes the following steps:

[0059] The feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time, and then hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times.

[0060] Example

[0061] Example 1

[0062] A high-oil-content self-oiling silicone rubber according to an embodiment of the present invention comprises the following components in parts by weight:

[0063]

[0064] The preparation method of the self-oiling silicone rubber with high oil content in this embodiment mainly includes the following steps:

[0065] S1 powder glue

[0066] The feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times, as follows:

[0067] First add 10 parts of fumed silica, 1 part of refined hydroxy silicone oil, 5 parts of Dow Corning hydroxy silicone oil, and 5 parts of phenyl silicone oil; mix for 10-15 minutes;

[0068] Add 15 parts of fumed silica, 1 part of refined hydroxy silicone oil, 9 parts of Dow Corning hydroxy silicone oil, and 10 parts of phenyl silicone oil for the second time; mix for 10 to 15 minutes;

[0069] Add 15 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 14 parts of Dow Corning hydroxy silicone oil, and 16 parts of phenyl silicone oil for the third time; mix for 10 to 15 minutes;

[0070] The fourth time, 15 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 14 parts of Dow Corning hydroxy silicone oil, and 16 parts of phenyl silicone oil were added; mixed for 10 to 15 minutes;

[0071] Add 1 part of refined hydroxy silicone oil, 8 parts of Dow Corning hydroxy silicone oil, 10 parts of phenyl silicone oil, 0.35 parts of stearic acid, and 0.4 parts of zinc oxide for the fifth time; after the hydroxy silicone oil, Dow Corning hydroxy silicone oil, and phenyl silicone oil are added to form a dough, continue kneading for 15 to 25 minutes.

[0072] S2 Internal Mixing

[0073] Take it out and place it for 5 to 6 hours before kneading. Start timing from 120℃, open the lid and knead for 20 to 40 minutes. The high temperature treatment temperature should be controlled between 165 and 195℃.

[0074] S3 glue stirring

[0075] Stir the qualified rubber material into a large ball with smooth surface, then filter it.

[0076] Example 2

[0077] A high-oil-content self-oiling silicone rubber according to an embodiment of the present invention comprises the following components in parts by weight:

[0078]

[0079]

[0080] The preparation method of the self-oiling silicone rubber with high oil content in this embodiment mainly includes the following steps:

[0081] S1 powder glue

[0082] The feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times, as follows:

[0083] First, add 9 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 5 parts of Dow Corning hydroxy silicone oil, and 6 parts of phenyl silicone oil; mix for 10-15 minutes;

[0084] Add 12 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 8 parts of Dow Corning hydroxy silicone oil, and 12 parts of phenyl silicone oil for the second time; mix for 10 to 15 minutes;

[0085] Add 12 parts of fumed silica, 3 parts of refined hydroxy silicone oil, 12 parts of Dow Corning hydroxy silicone oil, and 18 parts of phenyl silicone oil for the third time; mix for 10 to 15 minutes;

[0086] The fourth step was to add 12 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 12 parts of Dow Corning hydroxy silicone oil, and 18 parts of phenyl silicone oil; and mix for 10 to 15 minutes.

[0087] For the fifth time, add 1 part of refined hydroxy silicone oil, 8 parts of Dow Corning hydroxy silicone oil, and 11 parts of phenyl silicone oil, and then add 0.3 parts of stearic acid and 0.45 parts of zinc oxide; after the hydroxy silicone oil, Dow Corning hydroxy silicone oil and phenyl silicone oil are added to form a dough, continue kneading for 15 to 25 minutes.

[0088] S2 Internal Mixing

[0089] Take it out and place it for 5 to 6 hours before kneading. Start timing from 120℃, open the lid and knead for 20 to 40 minutes. The high temperature treatment temperature should be controlled between 165 and 195℃.

[0090] S3 glue stirring

[0091] Stir the qualified rubber material into a large ball with smooth surface, then filter it.

[0092] Example 3

[0093] A high-oil-content self-oiling silicone rubber according to an embodiment of the present invention comprises the following components in parts by weight:

[0094]

[0095] The preparation method of the self-oiling silicone rubber with high oil content in this embodiment mainly includes the following steps:

[0096] S1 powder glue

[0097] The feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times, as follows:

[0098] First, add 12 parts of fumed silica, 1 part of refined hydroxy silicone oil, 6 parts of Dow Corning hydroxy silicone oil, and 4.5 parts of phenyl silicone oil; mix for 10-15 minutes;

[0099] Add 18 parts of fumed silica, 1 part of refined hydroxy silicone oil, 10 parts of Dow Corning hydroxy silicone oil, and 8.5 parts of phenyl silicone oil for the second time; mix for 10 to 15 minutes;

[0100] Add 18 parts of fumed silica, 1 part of refined hydroxy silicone oil, 16 parts of Dow Corning hydroxy silicone oil, and 14 parts of phenyl silicone oil for the third time; mix for 10 to 15 minutes;

[0101] The fourth step was to add 16 parts of fumed silica, 1 part of refined hydroxy silicone oil, 16 parts of Dow Corning hydroxy silicone oil, and 14 parts of phenyl silicone oil; and mix for 10 to 15 minutes.

[0102] Add 1 part of refined hydroxy silicone oil, 8 parts of Dow Corning hydroxy silicone oil, 9 parts of phenyl silicone oil, 0.38 parts of stearic acid, and 0.38 parts of zinc oxide for the fifth time; after the hydroxy silicone oil, Dow Corning hydroxy silicone oil, and phenyl silicone oil are added to form a dough, continue kneading for 15 to 25 minutes.

[0103] S2 Internal Mixing

[0104] Take it out and place it for 5 to 6 hours before kneading. Start timing from 120℃, open the lid and knead for 20 to 40 minutes. The high temperature treatment temperature should be controlled between 165 and 195℃.

[0105] S3 glue stirring

[0106] Stir the qualified rubber material into a large ball with smooth surface, then filter it.

[0107] Performance Testing

[0108] The high oil content self-oiling silicone rubber prepared in Examples 1-3 was subjected to routine testing according to the standards in Table 1.

[0109] Table 1 Conventional testing performance test methods and requirements

[0110]

[0111] According to the detection method in Table 1, the appearance of the high-oil content self-oiling silicone rubber prepared in Examples 1-3 is milky white, and other performance results are shown in Table 2:

[0112] Table 2 Performance test results of the embodiment

[0113]

[0114] According to the test results, the test results of the high-oil content self-oiling silicone rubber prepared in Examples 1-3 of the present invention all meet the test standard range in Table 1, and the products of this silicone rubber after vulcanization have high oil content, fast oil output, large oil output, and good plasticity, which improves the problems of poor sealing effect and short service life of silicone rubber.

[0115] Application Examples

[0116] The oil-containing self-degrading silicone rubber is used as a masterbatch and mixed with other silicone rubbers. In this application example, the high-oil-containing self-degrading silicone rubber prepared in Example 1 of the present invention and the silicone rubber code-named Model A (Model 9030-40) prepared by our company are mixed to adjust the performance to meet the different usage requirements of customers.

[0117] Among them, the performance data of type A silicone rubber are shown in Table 3 below:

[0118] Table 3A silicone rubber performance data

[0119]

[0120]

[0121] Application Example 1

[0122] Take 1 part of the high oil content self-oiling silicone rubber in this Example 1 and 8 parts of type A silicone rubber, mix them on an open mill for a certain time, add a vulcanizing agent and mix again, mix evenly, and then vulcanize on a flat vulcanizing press. The vulcanized product is taken for performance testing, and the test results are shown in Table 4.

[0123] Application Example 2

[0124] The difference from Application Example 1 is that this application example uses 2 parts of the high-oil content self-oiling silicone rubber in Example 1 and 8 parts of type A silicone rubber. The remaining experimental steps and test methods are the same as those in Application Example 1. The performance test of the vulcanized product is performed, and the test results are shown in Table 4.

[0125] Application Example 3

[0126] The difference from Application Example 1 is that this application example uses 3 parts of the high-oil content self-oiling silicone rubber in Example 1 and 8 parts of type A silicone rubber. The remaining experimental steps and test methods are the same as those in Application Example 1. The performance test of the vulcanized product is carried out, and the test results are shown in Table 4.

[0127] Table 4 Application example performance test results

[0128]

[0129] According to the results in Table 4, the high-oil content self-oiling silicone rubber prepared by the present invention can be used as a masterbatch in combination with other silicone rubbers, which can more flexibly meet the different performance requirements of customers for silicone rubber products, achieve faster, more efficient and convenient adjustment of hardness, oil extraction rate and other properties, reduce costs, and at the same time have good sealing and aging resistance, smooth feel, relatively high surface finish, relatively flat surface, improved wear resistance, small deformation, strong adhesion, low viscosity-temperature coefficient, and high compression resistance.

[0130] It should be noted that specific application examples of the high-oil-content self-precipitating silicone rubber of the present invention as a masterbatch mixed with other silicone rubbers include but are not limited to the examples listed above. It can be mixed with the company's various precipitated silicone rubber models and vapor-phase silicone rubber models to meet the different performance requirements of customers. To a large extent, it eliminates the need for other silicone rubbers to undergo re-feeding, re-mixing, filtration and other production steps due to changes in performance requirements, greatly saving time and economic costs for customers and manufacturers.

Claims

1. A high oil content self-oiling silicone rubber, characterized in that The composition comprises the following components in parts by weight:

2. The high oil content self-oiling silicone rubber according to claim 1, characterized in that The composition comprises the following components in parts by weight:

3. The high oil content self-oiling silicone rubber according to claim 1, characterized in that The mixed methyl vinyl raw rubber is prepared by compounding 110-3s and 110-7s from Nanjing Dongjue Sales Co., Ltd. in a weight ratio of (0.1-0.3):

1.

4. The high oil content self-oiling silicone rubber according to claim 1, characterized in that The fumed silica is QS-102 from Tokuyama, Japan.

5. The high oil content self-oiling silicone rubber according to claim 1, characterized in that The Dow Corning hydroxy silicone oil is PMX-0930 produced by Dow Silicones; the hydroxy silicone oil is the general-purpose hydroxy silicone oil produced by Huizhou Tianyi Environmental Protection Materials Co., Ltd.

6. The high oil content self-oiling silicone rubber according to claim 1, characterized in that The phenyl silicone oil is phenyl silicone oil 6005A produced by Foshan Chuying Chemical Co., Ltd.

7. A method for preparing the high oil content self-oiling silicone rubber according to any one of claims 1 to 6, characterized in that The following steps are involved: S1 powder glue The powder feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times. The number of times each component is added is 4-5 times. After each addition, mix for 10-15 minutes. After the powdered white carbon black, hydroxy silicone oil, Dow Corning hydroxy silicone oil and phenyl silicone oil are added, add stearic acid and zinc oxide. After forming a mass, continue kneading for 15-25 minutes. S2 Internal Mixing Take it out and place it for 5 to 6 hours before kneading. Start timing from 120℃, open the lid and knead for 20 to 40 minutes. The high temperature treatment temperature should be controlled between 165 and 195℃. S3 glue stirring Stir the qualified rubber material into a large ball with smooth surface, then filter it.

8. The method for preparing the high oil content self-oiling silicone rubber according to claim 7, characterized in that In S1, the specific steps of adding hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil, and white carbon black in multiple times are as follows: First, add 8-12 parts of fumed silica, 0.5-1.5 parts of refined hydroxy silicone oil, 4-6 parts of Dow Corning hydroxy silicone oil, and 4-6 parts of phenyl silicone oil; mix for 10-15 minutes; Add 12-18 parts of fumed silica, 0.5-1.5 parts of refined hydroxy silicone oil, 8-10 parts of Dow Corning hydroxy silicone oil, and 8-12 parts of phenyl silicone oil for the second time; mix for 10-15 minutes; Add 12-18 parts of fumed silica, 1.5-2.5 parts of refined hydroxy silicone oil, 12-16 parts of Dow Corning hydroxy silicone oil, and 14-18 parts of phenyl silicone oil for the third time; mix for 10-15 minutes; Add the remaining fumed silica, 1.5-2.5 parts of refined hydroxy silicone oil, 12-16 parts of Dow Corning hydroxy silicone oil, and 14-18 parts of phenyl silicone oil for the fourth time; mix for 10-15 minutes; The remaining refined hydroxy silicone oil, Dow Corning hydroxy silicone oil and phenyl silicone oil were added for the fifth time.

9. The method for preparing the high oil content self-oiling silicone rubber according to claim 7, characterized in that The powder glue in S1 includes the following steps: The feeding temperature is controlled at 50-80℃, and the mixed methyl vinyl rubber is added at one time. Then, hydroxy silicone oil, Dow Corning hydroxy silicone oil, phenyl silicone oil and white carbon black are added in several times, as follows: First add 10 parts of fumed silica, 1 part of refined hydroxy silicone oil, 5 parts of Dow Corning hydroxy silicone oil, and 5 parts of phenyl silicone oil; mix for 10-15 minutes; Add 15 parts of fumed silica, 1 part of refined hydroxy silicone oil, 9 parts of Dow Corning hydroxy silicone oil, and 10 parts of phenyl silicone oil for the second time; mix for 10 to 15 minutes; Add 15 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 14 parts of Dow Corning hydroxy silicone oil, and 16 parts of phenyl silicone oil for the third time; mix for 10 to 15 minutes; The fourth time, 15 parts of fumed silica, 2 parts of refined hydroxy silicone oil, 14 parts of Dow Corning hydroxy silicone oil, and 16 parts of phenyl silicone oil were added; mixed for 10 to 15 minutes; The fifth time, 1 part of refined hydroxy silicone oil, 8 parts of Dow Corning hydroxy silicone oil, and 10 parts of phenyl silicone oil were added; After adding the powdered silica, hydroxy silicone oil, Dow Corning hydroxy silicone oil and phenyl silicone oil, add 0.35 parts of stearic acid and 0.4 parts of zinc oxide; after forming a mass, continue kneading for 15 to 25 minutes.

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