Rubber compositions and vulcanizates, and methods of making and using the same

Abstract

The present application relates to the field of rubber, and discloses a rubber composition and vulcanized rubber as well as a preparation method and application thereof.The rubber composition contains 100 parts of nitrile rubber, 20-60 parts of reinforcing agent, 5-30 parts of hindered phenolic antioxidant, 5-20 parts of tackifying resin, 3-10 parts of activator, 0.5-2.5 parts of vulcanizing agent and 0.5-2.5 parts of accelerator, calculated by weight.The reinforcing agent includes reinforcing agent A and reinforcing agent B.The mass ratio of reinforcing agent A to reinforcing agent B is 1-5:1.Reinforcing agent A is carbon black and / or white carbon black, and reinforcing agent B is carbon nanofiber.The specific content of the reinforcing agent and the specific content of the hindered phenolic antioxidant in the rubber composition jointly act in combination with the specific content of the tackifying resin, so that the vulcanized rubber prepared from the rubber composition has better mechanical properties, a widened damping temperature range and improved heat aging resistance.

Description

Technical Field

[0001] This invention relates to the field of rubber, and more specifically, to a rubber composition and a vulcanized rubber and a method for preparing the same. Background Technology

[0002] Noise and vibration generated by the operation of mechanical equipment are prominent problems, and reducing noise and mitigating the hazards of mechanical vibration have become urgent issues to be addressed in the development of modern industrial technology. Rubber, as a polymer material, possesses unique viscoelastic properties and exhibits excellent damping characteristics in its glass transition region.

[0003] Nitrile rubber is a high molecular weight elastomer obtained by free radical-initiated emulsion polymerization of butadiene and acrylonitrile. The molecular chain has polar nitrile groups, and the polar groups will generate strong interactions when the molecular chain moves. Therefore, nitrile rubber has good damping properties.

[0004] However, nitrile rubber currently suffers from problems such as an insufficient damping temperature range, poor tensile strength when used as a damping material, and poor resistance to heat and oxygen aging, which limits its application areas.

[0005] Therefore, expanding the damping temperature range of nitrile rubber and improving its tensile strength and resistance to heat and oxygen aging are currently hot research topics, which are of great significance for the future application of nitrile rubber in the field of damping. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems of the existing technology, such as the narrow damping temperature range of nitrile rubber, poor tensile strength, and poor heat and oxygen aging resistance when used as a damping material. This invention provides a rubber composition, a vulcanized rubber, its preparation method, and its application. The rubber composition contains a specific amount of reinforcing agent and a specific amount of hindered phenolic antioxidant working together, and synergistically contains a specific amount of tackifying resin. This ensures that the vulcanized rubber prepared from this rubber composition has good mechanical properties while expanding the damping temperature range and improving its heat aging resistance.

[0007] To achieve the above objectives, the first aspect of the present invention provides a rubber composition, characterized in that, by weight, the rubber composition contains 100 parts of nitrile rubber, 20-60 parts of reinforcing agent, 5-30 parts of hindered phenolic antioxidant, 5-20 parts of tackifying resin, 3-10 parts of activator, 0.5-2.5 parts of vulcanizing agent, and 0.5-2.5 parts of accelerator;

[0008] The reinforcing agent includes reinforcing agent A and reinforcing agent B;

[0009] The mass ratio of the reinforcing agent A to the reinforcing agent B is 1-5:1;

[0010] The reinforcing agent A is carbon black and / or silica, and the reinforcing agent B is carbon nanofiber.

[0011] The second aspect of the present invention provides a method for preparing vulcanized rubber, characterized in that the rubber composition described in the first aspect is mixed and vulcanized.

[0012] A third aspect of the present invention provides a vulcanized rubber prepared by the method described in the second aspect.

[0013] The fourth aspect of this invention provides the application of the vulcanized rubber described in the third aspect in damping materials.

[0014] Through the above technical solutions, the rubber composition, vulcanized rubber, preparation method, and application provided by the present invention achieve the following beneficial effects:

[0015] (1) The rubber composition contains a specific type and amount of reinforcing agent, and at the same time, a specific amount of tackifying resin, which can ensure the good mechanical properties of the vulcanized rubber prepared from the rubber composition, while broadening the damping temperature range of the vulcanized rubber.

[0016] (2) The rubber composition contains a specific type and amount of antioxidant, a specific type and amount of reinforcing agent, and a specific amount of tackifying resin, which can further improve the heat aging resistance of the vulcanized rubber while ensuring that the vulcanized rubber has a wide damping temperature range and mechanical properties. Detailed Implementation

[0017] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0018] The first aspect of the present invention provides a rubber composition, characterized in that, by weight, the rubber composition contains 100 parts of nitrile rubber, 20-60 parts of reinforcing agent, 5-30 parts of hindered phenolic antioxidant, 5-20 parts of tackifying resin, 3-10 parts of activator, 0.5-2.5 parts of vulcanizing agent, and 0.5-2.5 parts of accelerator;

[0019] The reinforcing agent includes reinforcing agent A and reinforcing agent B;

[0020] The mass ratio of the reinforcing agent A to the reinforcing agent B is 1-5:1;

[0021] The reinforcing agent A is carbon black and / or silica, and the reinforcing agent B is carbon nanofiber.

[0022] In this invention, the rubber composition contains a specific amount of reinforcing agent and a specific amount of hindered phenolic antioxidant, which, together with a specific amount of tackifying resin, can ensure that the vulcanized rubber prepared from the rubber composition has good mechanical properties, a widened damping temperature range, and further improved heat aging resistance.

[0023] In this invention, there are no special requirements for the type of carbon nanofibers, which can be commercially available. There are also no special requirements for their diameter, for example, it can be 50-200 nm, and there are no requirements for their length, for example, it can be 1-15 μm.

[0024] According to the present invention, the composition comprises, by weight: 100 parts nitrile rubber, 20-50 parts reinforcing agent, 5-20 parts hindered phenolic antioxidant, 5-15 parts tackifying resin, 4-8 parts activator, 0.5-2 parts vulcanizing agent and 1-2.5 parts accelerator.

[0025] In this invention, the inventors discovered that when the hindered phenolic antioxidant is AO-60 and / or AO-80, the vulcanized rubber prepared has better aging resistance.

[0026] According to the present invention, the hindered phenolic antioxidant is AO-60 and / or AO-80.

[0027] According to the present invention, the mass ratio of the reinforcing agent A to the reinforcing agent B is 1.5-5:1.

[0028] The inventors have discovered that the type of hindered phenolic antioxidant is closely related to the total amount of the reinforcing agent, the tackifying resin, and the hindered phenolic antioxidant. When the relationship between them meets the above-mentioned range, the mechanical properties of the prepared vulcanized rubber can be further improved while having a wide damping temperature range.

[0029] In one specific embodiment of the present invention, the hindered phenolic antioxidant is AO-60, and the total amount of the reinforcing agent, the tackifying resin and the AO-60 is 40-55 parts relative to 100 parts by weight of the nitrile rubber.

[0030] In one specific embodiment of the present invention, the hindered phenolic antioxidant is AO-80, and the total amount of the reinforcing agent, the tackifying resin and the AO-80 is 38-53 parts relative to 100 parts by weight of the nitrile rubber.

[0031] Further, the hindered phenolic antioxidant is AO-60, and the total amount of the reinforcing agent, the tackifying resin and the AO-60 is 40-50 parts relative to 100 parts by weight of the nitrile rubber.

[0032] Alternatively, the hindered phenolic antioxidant is AO-80, and the total amount of the reinforcing agent, the tackifying resin, and the AO-80 is 38-48 parts relative to 100 parts by weight of the nitrile rubber.

[0033] In one specific embodiment of the present invention, the hindered phenolic antioxidant is selected from AO-60 and AO-80, and the total amount of the reinforcing agent, the tackifying resin and the hindered phenolic antioxidant is 38-55 parts, wherein the mass ratio of AO-60 to AO-80 is 1-5:1.

[0034] According to the present invention, in the nitrile rubber, the content of acrylonitrile structural units is 15-45 wt%, and the content of 1,2-butadiene structural units is 5-15 wt%.

[0035] Furthermore, the content of the acrylonitrile structural unit is 20-40 wt%, and the content of the 1,2-butadiene structural unit is 5-8 wt%.

[0036] According to the present invention, the Mooney viscosity ML (1+4min, 100°C) of the nitrile rubber is 35-75, preferably 50-70.

[0037] In this invention, the inventors discovered that when the reinforcing agent A is carbon black, it can better cooperate with other components and further improve the overall performance of vulcanized rubber.

[0038] According to the present invention, the CTAB adsorption specific surface area of ​​the carbon black is 10-600 m². 2 / g.

[0039] In this invention, the CTAB adsorption specific surface area of ​​the carbon black meets the above-mentioned range, which can effectively improve the tensile strength of rubber.

[0040] In this invention, the CTAB adsorption specific surface area of ​​the carbon black is 10-200 m². 2 / g.

[0041] According to the present invention, the tackifying resin is at least one selected from C5 petroleum resin, C9 petroleum resin, phenolic resin, coumarone resin and terpene phenol resin.

[0042] According to the present invention, the activator is a mixture of metal oxide and fatty acid.

[0043] According to the present invention, the mass ratio of the metal oxide to the fatty acid is 2-5:1, preferably 2.5-5:1.

[0044] According to the present invention, the metal oxide is zinc oxide and / or magnesium oxide; the fatty acid is stearic acid.

[0045] According to the present invention, the vulcanizing agent is selected from sulfur donors.

[0046] According to the present invention, the vulcanizing agent is selected from at least one of sublimed sulfur, insoluble sulfur, soluble sulfur and oil-extended sulfur.

[0047] According to the present invention, the accelerator is selected from at least one of sulfenamide accelerators, thiazole accelerators, thiuram accelerators, and guanidine accelerators.

[0048] According to some embodiments of the present invention, the accelerator is selected from at least one of N-cyclohexyl-2-benzothiazole sulfenamide (CZ), 2-thiol-benzothiazole (M), and tetramethylthiuram disulfide (TMTD).

[0049] The second aspect of the present invention provides a method for preparing vulcanized rubber, characterized in that the rubber composition described in the first aspect is mixed and vulcanized.

[0050] In this invention, there are no particular limitations on the method for preparing vulcanized rubber using the aforementioned composition. Various methods commonly used in the art for preparing vulcanized rubber can be employed to achieve the basic performance requirements of the vulcanized rubber as specified in this invention.

[0051] However, the inventors discovered through their research that the following method can make the mixing components in the process more uniform, thereby resulting in vulcanized rubber with better mechanical and damping properties after vulcanization.

[0052] According to the present invention, the method includes the following steps:

[0053] S1. Nitrile rubber, reinforcing agent, hindered phenolic antioxidant, tackifying resin and activator are first mixed to obtain first compound;

[0054] S2. The first compound rubber, vulcanizing agent and accelerator are mixed a second time to obtain the final compound rubber.

[0055] S3. The final compound is vulcanized to obtain the vulcanized rubber.

[0056] According to the present invention, the conditions for the first mixing include: the first mixing temperature is 40-160°C, preferably 50-160°C; and the time is 3-18 min, preferably 6-11 min.

[0057] According to the present invention, the conditions for the second mixing include: the temperature of the second mixing is ≤110℃, preferably 35-110℃; and the time is 3-5 min, preferably 3-4 min.

[0058] In this invention, to achieve better results, the discharge temperature of the final rubber compound is ≤110℃.

[0059] According to the present invention, the vulcanization conditions include: a temperature of 150-170°C, preferably 150-160°C; a pressure of 5-15 MPa, preferably 8-15 MPa; and a time of 15-35 min, preferably 15-30 min.

[0060] In this invention, to further obtain vulcanized rubber with superior overall performance, the method can further refine the stepwise mixing of the components in the composition, specifically including:

[0061] S1. Nitrile rubber, reinforcing agent A and activator are first mixed in I to obtain the first compound;

[0062] S2. The first compound, reinforcing agent B, hindered phenolic antioxidant and tackifying resin are first compounded II to obtain the second compound.

[0063] S3. The second compound, vulcanizing agent and accelerator are mixed for a second time to obtain the final compound.

[0064] S3. The final compound is vulcanized to obtain the vulcanized rubber.

[0065] In this invention, the conditions for the first mixing process I include: the temperature of the first mixing process I is 40-160℃, preferably 50-130℃; and the time is 1-10 min, preferably 3-8 min.

[0066] In this invention, the conditions for the first mixing II include: the temperature of the first mixing II is 40-160°C, preferably 50-160°C; and the time is 1-10 min, preferably 3-8 min.

[0067] In this invention, the sum of the mixing times of the first mixing I and the first mixing II is 3-18 min, preferably 6-11 min.

[0068] In this invention, the conditions for the second mixing include: the temperature of the second mixing is ≤110℃, preferably 35-110℃; and the time is 3-5 min, preferably 3-4 min.

[0069] In this invention, to achieve better results, the discharge temperature of the final rubber compound is ≤110℃.

[0070] In this invention, during the mixing process in the mixing equipment (e.g., an internal mixer), the temperature of the system rises as the mixing progresses; that is, the mixing temperature is a dynamic heating process. The mixing temperature in this invention is a range value; as long as the individual mixing temperatures do not exceed the aforementioned range, it is acceptable. Specifically, the temperature of the first mixing I does not exceed 160°C, the temperature of the first mixing II does not exceed 160°C, and the temperature of the second mixing does not exceed 110°C.

[0071] In this invention, the vulcanization conditions are the same as those described above, and will not be repeated here.

[0072] Unless otherwise specified, all pressures used in this invention are gauge pressures.

[0073] A third aspect of the present invention provides a vulcanized rubber prepared by the method described in the second aspect.

[0074] The fourth aspect of this invention provides the application of the vulcanized rubber described in the third aspect in damping materials.

[0075] The present invention will be described in detail below through examples. In the following examples, unless otherwise specified, all raw materials used are commercially available products.

[0076] Nitrile rubber: Nitrile rubber 3365, with an acrylonitrile structural unit content of 35.5wt% and a 1,2-butadiene structural unit content of 7.2wt%; Mooney viscosity ML (1+4min, 100℃) is 65;

[0077] Reinforcing agents: Reinforcing agent A: Carbon black, N660, manufactured by Cabot Corporation; Reinforcing agent B: Carbon nanofibers: Beijing Mairuida Technology Co., Ltd., with a diameter of 100nm and a length of 10μm;

[0078] Hindered phenolic antioxidants: AO-60, AO-80, both purchased from Beijing Innocare Technology Co., Ltd.;

[0079] Tackifying resin: C5 petroleum resin, brand name Escorez 1102, produced by Guangzhou Nuochi Chemical Technology Co., Ltd.

[0080] Activators: Zinc oxide, stearic acid, Weifang Hengfeng Chemical Co., Ltd.;

[0081] Vulcanizing agent: Sublimed sulfur, Weifang Zhongheng Chemical Co., Ltd.;

[0082] Accelerator: N-cyclohexyl-2-benzothiazole sulfenamide (CZ), Tianjin Maofeng Rubber Additives Co., Ltd.

[0083] The equipment used to prepare the vulcanized rubber in the following examples and comparative examples is shown in Table 1.

[0084] The testing instruments for the vulcanized rubbers prepared in the following examples and comparative examples are shown in Table 2.

[0085] The test conditions for the vulcanized rubber prepared in the following examples and comparative examples are shown in Table 3.

[0086] Unless otherwise specified, the parts in the following examples are by weight, with each part representing 10g; the temperature ranges in the following examples represent the actual temperature changes as shown by the temperature monitor during the rubber mixing process.

[0087] Table 1

[0088] 1 Internal mixer BR1600 American Farrell Company 2 open mill XK-160 Qingdao Xincheng Yiming Rubber Machinery Co., Ltd. 3 Flat vulcanizing machine P-50-PCD-3L400×400\50T Pan-Shih Hydraulic Industry Co., Ltd., Taiwan

[0089] Table 2

[0090] 1 Tensile strength GT-AT-3000 Taiwan High Speed ​​Rail Corporation 2 Dynamic viscoelastic properties EPLEXOR500N GABO Germany

[0091] Table 3

[0092]

[0093] Examples 1-6

[0094] The rubber composition was compounded according to the formulation in Table 4, as follows:

[0095] S1. Nitrile rubber, activator and carbon black are introduced into the internal mixer for the first mixing I. The speed of the internal mixer is set to 77 rpm and the initial temperature is set to 60℃. The first mixing I is carried out at 60℃ to 120℃ for 3 minutes. The material is discharged and left to stand for 4 hours to obtain the first compound.

[0096] S2. The first compound is added to a mixer with carbon nanofibers, hindered phenolic antioxidants and tackifying resin for first mixing II. The speed is set to 77 rpm and the first mixing II is carried out at 80°C to 120°C for 3 minutes. The material is discharged and left to stand for 4 hours to obtain the second compound.

[0097] S3. Add the second compound rubber, accelerator, and vulcanizing agent to the internal mixer for a second mixing. Set the speed to 60 rpm and the initial temperature to 35℃. Perform the second mixing at 35℃ to 110℃ for 4 minutes. The discharge temperature is 110℃ to obtain the final compound rubber.

[0098] S4. The final rubber compound is pressed into sheets and cut into sheets using an open mill and then placed into a flat vulcanizing machine for vulcanization. The vulcanization temperature is 160℃, the vulcanization pressure is 15MPa, and the vulcanization time is 15min, to obtain vulcanized rubber samples S1-S6.

[0099] Table 4

[0100]

[0101]

[0102] Example 7

[0103] The method of Example 1 was followed, except that the amount of 1102 resin was 2 parts, and vulcanized rubber sample S7 was obtained.

[0104] Example 8

[0105] The method of Example 1 was followed, except that the acrylonitrile structural unit content in the nitrile rubber was 27.5 wt% and the 1,2-butadiene structural unit content was 8.2 wt%, and vulcanized rubber sample S8 was obtained.

[0106] Example 9

[0107] The method of Example 1 was followed, except that 20 parts of N660 carbon black, 10 parts of carbon nanofibers, 25 parts of AO-60, and 10 parts of 1102 resin were used, so that the total amount of reinforcing agent + hindered phenolic antioxidant + tackifying resin was 65 parts, wherein the mass ratio of reinforcing agent A to reinforcing agent B was 2:1, and vulcanized rubber sample S9 was obtained.

[0108] Example 10

[0109] The formulation in Example 1 of Table 4 was used to prepare vulcanized rubber according to the following method.

[0110] S1. Nitrile rubber, reinforcing agent, hindered phenolic antioxidant, tackifying resin and activator are put into internal mixer for the first mixing. The speed is set to 77 rpm and the initial temperature is set to 60℃. The first mixing is carried out at 60℃ to 120℃ for 10 minutes. The material is discharged and left to stand for 4 hours to obtain the compound.

[0111] S2. The compound rubber, vulcanizing agent and accelerator are mixed for a second time. The speed of the internal mixer is set to 60 rpm and the initial temperature is set to 35°C. The second mixing is carried out at 60°C to 110°C for 5 minutes. The discharge temperature is controlled at 110°C. The material is discharged and left to stand for 4 hours to obtain the final compound rubber.

[0112] S3. The final rubber compound is pressed into sheets and cut into sheets using an open mill and then placed in a flat vulcanizing machine for vulcanization. The vulcanization temperature is 190℃, the vulcanization pressure is 15MPa, and the vulcanization time is 15min, to obtain vulcanized rubber sample S10.

[0113] Example 11

[0114] The method of Example 1 was followed, except that AO-60 was replaced with 2,8-di-tert-butyl-4-methylphenol to obtain vulcanized rubber sample S11.

[0115] Comparative Example 1

[0116] The method of Example 1 was followed, except that no carbon nanofibers were included, to obtain vulcanized rubber sample D1.

[0117] Comparative Example 2

[0118] The method of Example 1 was followed, except that the amount of AO-60 was 1 part, so that the total amount of reinforcing agent + hindered phenolic antioxidant + tackifying resin was 31 parts, and vulcanized rubber sample D2 was obtained.

[0119] Comparative Example 3

[0120] The method of Example 1 was followed, except that the amount of 1102 resin was 1 part, so that the total amount of reinforcing agent + hindered phenolic antioxidant + tackifying resin was 31 parts, and vulcanized rubber sample D3 was obtained.

[0121] Comparative Example 4

[0122] The method of Example 1 was followed, except that the amount of carbon black was 5 parts, so that the total amount of reinforcing agent + hindered phenolic antioxidant + tackifying resin was 30 parts, wherein the mass ratio of reinforcing agent A to reinforcing agent B was 1:1, and vulcanized rubber sample D4 was obtained.

[0123] Comparative Example 5

[0124] The method of Example 1 was followed, except that AO-60 was replaced with an equal mass of antioxidant 168 to obtain vulcanized rubber sample D5.

[0125] Comparative Example 6

[0126] The method of Example 1 was followed, except that the amount of carbon black was 5 parts and the amount of carbon nanofiber was 15 parts, so that the total amount of reinforcing agent + hindered phenolic antioxidant + tackifying resin was 40 parts, wherein the mass ratio of reinforcing agent A to reinforcing agent B was 0.3:1, and vulcanized rubber sample D6 was obtained.

[0127] Test case

[0128] The vulcanized rubber samples prepared in the examples and comparative examples were subjected to performance tests, and the results are shown in Table 5.

[0129] Table 5

[0130]

[0131] The results above show that the embodiments 1-11 of the present invention have strong mechanical properties, anti-aging properties and a wide damping temperature range.

[0132] Among them, the preferred embodiments 1-5 have significantly better effects, providing a wider temperature range with a temperature difference of not less than 42℃ while ensuring a tensile strength of not less than 20MPa. Furthermore, they exhibit excellent anti-aging properties, with a tensile strength retention rate of not more than 7% after aging.

[0133] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A rubber composition, characterized in that, Based on parts by weight, the rubber composition contains 100 parts of nitrile rubber, 20-60 parts of reinforcing agent, 5-30 parts of hindered phenolic antioxidant, 5-20 parts of tackifying resin, 3-10 parts of activator, 0.5-2.5 parts of vulcanizing agent, and 0.5-2.5 parts of accelerator. The reinforcing agent includes reinforcing agent A and reinforcing agent B; The mass ratio of the reinforcing agent A to the reinforcing agent B is 1-5:1; The reinforcing agent A is carbon black and / or silica, and the reinforcing agent B is carbon nanofibers; The hindered phenolic antioxidant is AO-60 and / or AO-80; The components in the rubber composition are compounded in steps, including: S1. Nitrile rubber, reinforcing agent A and activator are first mixed in I to obtain the first compound; S2. The first compound, reinforcing agent B, hindered phenolic antioxidant and tackifying resin are first compounded II. The hindered phenolic antioxidant is AO-60, and the total amount of the reinforcing agent, the tackifying resin and the AO-60 is 40-50 parts relative to 100 parts by weight of the nitrile rubber. Alternatively, the hindered phenolic antioxidant is AO-80, and the total amount of the reinforcing agent, the tackifying resin, and the AO-80 is 38-48 parts relative to 100 parts by weight of the nitrile rubber.

2. The rubber composition according to claim 1, wherein, The composition comprises, by weight, 100 parts nitrile rubber, 20-50 parts reinforcing agent, 5-20 parts hindered phenolic antioxidant, 5-15 parts tackifying resin, 4-8 parts activator, 0.5-2 parts vulcanizing agent and 1-2.5 parts accelerator.

3. The rubber composition according to claim 1, wherein, The mass ratio of the reinforcing agent A to the reinforcing agent B is 1.5-5:

1.

4. The rubber composition according to any one of claims 1-3, wherein, In the nitrile rubber, the content of acrylonitrile structural units is 15-45 wt%, and the content of 1,2-butadiene structural units is 5-15 wt%.

5. The rubber composition according to any one of claims 1-3, wherein, The Mooney viscosity ML1+4min of the nitrile rubber is 35-75 at 100℃.

6. The rubber composition according to any one of claims 1-3, wherein, The carbon black has a CTAB adsorption specific surface area of ​​10-600 m². 2 / g.

7. The rubber composition according to any one of claims 1-3, wherein, The CTAB adsorption specific surface area of ​​the carbon black is 10-200 m². 2 / g.

8. The rubber composition according to any one of claims 1-3, wherein, The tackifying resin is at least one of C5 petroleum resin, C9 petroleum resin, phenolic resin, coumarone resin, and terpene phenol resin.

9. The rubber composition according to any one of claims 1-3, wherein, The activator is a mixture of metal oxides and fatty acids.

10. The rubber composition according to claim 9, wherein, The mass ratio of the metal oxide to the fatty acid is 2-5:

1.

11. The rubber composition according to claim 9, wherein, The mass ratio of the metal oxide to the fatty acid is 2.5-5:

1.

12. The rubber composition according to claim 9, wherein, The metal oxide is zinc oxide and / or magnesium oxide; the fatty acid is stearic acid.

13. The rubber composition according to any one of claims 1-3, wherein, The vulcanizing agent is selected from sulfur donors.

14. The rubber composition according to any one of claims 1-3, wherein, The vulcanizing agent is selected from at least one of sublimed sulfur, insoluble sulfur, soluble sulfur, and oil-extended sulfur.

15. The rubber composition according to any one of claims 1-3, wherein, The accelerator is selected from at least one of sulfenamide accelerators, thiazole accelerators, thiuram accelerators, and guanidine accelerators.

16. A method for preparing vulcanized rubber, characterized in that, The rubber composition according to any one of claims 1-15 is mixed and vulcanized.

17. The method according to claim 16, wherein, The method includes the following steps: S1. Nitrile rubber, reinforcing agent, hindered phenolic antioxidant, tackifying resin and activator are first mixed to obtain compound; S2. The compound rubber, vulcanizing agent and accelerator are mixed a second time to obtain the final compound rubber; S3. The final compound is vulcanized to obtain the vulcanized rubber.

18. The method according to claim 17, wherein, The conditions for the first mixing process include: a mixing temperature of 40-160℃ and a mixing time of 3-18 minutes.

19. The method of claim 17, wherein, The conditions for the first mixing process include: a mixing temperature of 50-160℃ and a mixing time of 6-11 minutes.

20. The method of claim 17, wherein, The conditions for the second mixing process include: the second mixing temperature ≤ 110℃; and the time 3-5 min.

21. The method according to claim 17, wherein, The conditions for the second mixing process include: a mixing temperature of 35-110℃ and a mixing time of 3-4 minutes.

22. The method according to claim 17, wherein, The vulcanization conditions include: a temperature of 150-170℃; a pressure of 5-15MPa; and a time of 15-35min.

23. The method according to claim 17, wherein, The vulcanization conditions include: a temperature of 150-160℃; a pressure of 8-15MPa; and a time of 15-30min.

24. A vulcanized rubber prepared by the method according to any one of claims 16-23.

25. The application of the vulcanized rubber of claim 24 in damping materials.

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