Butyl rubber composition, vulcanized butyl rubber and method for its production and use

Abstract

This invention relates to the field of rubber, and discloses a butyl rubber composition, vulcanized butyl rubber, its preparation method, and its applications. By weight, the composition comprises: 100 parts butyl rubber, 10-40 parts reinforcing agent, 5-30 parts tackifying resin, 3-10 parts activator, 0.5-3 parts vulcanizing agent, and 0.5-3 parts accelerator; wherein the tackifying resin comprises tackifying resin A and tackifying resin B; tackifying resin A is a C5 resin; and tackifying resin B is selected from at least one of octylphenolic vulcanizing resin, brominated octylphenolic resin, epoxy resin, and aliphatic hydrocarbon resin. This rubber composition contains two specific types of tackifying resins, and works synergistically with a specific amount of reinforcing agent, ensuring that the vulcanized rubber prepared from this rubber composition has good mechanical properties while broadening the damping temperature range of the butyl rubber in the high-temperature region.

Description

Technical Field

[0001] This invention relates to the field of rubber, and more specifically, to a butyl rubber composition and vulcanized butyl rubber, as well as their preparation methods and applications. Background Technology

[0002] Butyl rubber is a high-molecular-weight polymer obtained by cationic polymerization of isobutylene and a small amount of isoprene. Its molecular structure contains densely packed side methyl groups. During chain relaxation, steric hindrance increases the internal friction between rubber molecular chains, resulting in significant energy loss and thus exhibiting excellent damping properties. This unique structure gives butyl rubber superior damping performance at low and room temperatures, but its damping performance is lower at high temperatures. Therefore, the key to improving the damping performance of butyl rubber lies in researching and improving its high-temperature damping properties.

[0003] Selecting appropriate polymer blends, adding small molecule fillers, and employing special vulcanization methods and systems are all important means to effectively broaden the damping temperature range of butyl rubber. Among these methods, adding resin to the rubber matrix is ​​a way to prepare novel high-damping rubber composites. The strong van der Waals forces between the resin and rubber molecules restrict the movement of rubber molecular chains, shifting the glass transition temperature to higher temperatures and thus broadening its damping temperature range. Summary of the Invention

[0004] The purpose of this invention is to overcome the narrow damping temperature range and low damping performance of butyl rubber in the high-temperature region. This invention provides a butyl rubber composition and vulcanized butyl rubber, as well as their preparation method and application. The rubber composition contains two specific types of tackifying resins and a specific amount of reinforcing agent. This ensures that the vulcanized rubber prepared from the rubber composition has good mechanical properties while broadening the damping temperature range of butyl rubber in the high-temperature region.

[0005] To achieve the above objectives, the first aspect of the present invention provides a rubber composition, characterized in that, by weight, the composition comprises: 100 parts butyl rubber, 10-40 parts reinforcing agent, 5-30 parts tackifying resin, 3-10 parts activator, 0.5-3 parts vulcanizing agent, and 0.5-3 parts accelerator.

[0006] The tackifying resin includes tackifying resin A and tackifying resin B;

[0007] The tackifying resin A is a C5 resin; the tackifying resin B is selected from at least one of octylphenol aldehyde resin, brominated octylphenol aldehyde resin, epoxy resin and aliphatic hydrocarbon resin.

[0008] 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.

[0009] A third aspect of the present invention provides a vulcanized rubber prepared by the method described in the second aspect.

[0010] The fourth aspect of this invention provides the application of the vulcanized rubber described in the third aspect in damping materials.

[0011] Through the above technical solutions, the butyl rubber composition, vulcanized butyl rubber, their preparation method, and applications provided by the present invention achieve the following beneficial effects:

[0012] The butyl rubber composition of the present invention contains two specific types of tackifying resins that can form strong van der Waals forces with rubber molecules, thereby restricting the movement of rubber molecular chains, shifting the glass transition temperature to a higher temperature, and widening its damping temperature range. At the same time, in synergy with a specific amount of reinforcing agent, it can ensure that the mechanical properties of the vulcanized rubber prepared from the rubber composition meet the requirements for use while maintaining a wide damping temperature range.

[0013] Furthermore, when the two tackifying resins are combined in a specific ratio, the damping properties of the vulcanized rubber obtained from the composition can be further improved. Detailed Implementation

[0014] 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.

[0015] The first aspect of the present invention provides a butyl rubber composition, characterized in that, by weight, the composition comprises: 100 parts butyl rubber, 10-40 parts reinforcing agent, 5-30 parts tackifying resin, 3-10 parts activator, 0.5-3 parts vulcanizing agent and 0.5-3 parts accelerator;

[0016] The tackifying resin includes tackifying resin A and tackifying resin B;

[0017] The tackifying resin A is a C5 resin; the tackifying resin B is selected from at least one of octylphenol aldehyde resin, brominated octylphenol aldehyde resin, epoxy resin and aliphatic hydrocarbon resin.

[0018] In this invention, the butyl rubber composition contains two specific types of tackifying resins that can form strong van der Waals forces with rubber molecules, thereby restricting the movement of rubber molecular chains, shifting the glass transition temperature to a higher temperature, and widening its damping temperature range. At the same time, in synergy with a specific amount of reinforcing agent, it can ensure that the vulcanized rubber prepared from this rubber composition meets the mechanical properties required for use while maintaining a wide damping temperature range.

[0019] Further, by weight, the composition comprises: 100 parts butyl rubber, 10-30 parts reinforcing agent, 10-30 parts tackifying resin, 4-8 parts activator, 0.5-2 parts vulcanizing agent and 1-2.5 parts accelerator.

[0020] In one specific embodiment of the present invention, the tackifying resin A is a C5 resin, preferably selected from at least one of Wingtack 95 resin, Wingtack 10 resin, and Wingtack 98 resin.

[0021] In one specific embodiment of the present invention, the octylphenolic resin is at least one of resin HY 2045, resin 1045, and resin 1055.

[0022] In one specific embodiment of the present invention, the brominated octylphenol resin is resin 1055, resin 2055, etc.

[0023] In one specific embodiment of the present invention, the epoxy resin is resin 711, resin E51, resin 618, etc.

[0024] In one specific embodiment of the present invention, the aliphatic hydrocarbon resin is resin 1102, resin 1202, etc.

[0025] In this invention, the inventors discovered that when the tackifying resin B is aliphatic hydrocarbon resin 1102, it can better cooperate with other components and further improve the overall performance of vulcanized rubber.

[0026] According to the present invention, the reinforcing agent is carbon black.

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

[0028] In this invention, when the mass ratio of tackifying resin A to tackifying resin B meets the above-mentioned range, the damping properties of the vulcanized rubber obtained from the composition can be further improved.

[0029] Furthermore, the mass ratio of the tackifying resin A to the tackifying resin B is 1-4:1.

[0030] According to the present invention, the total weight of the reinforcing agent and the tackifying resin is 15-70 parts relative to 100 parts by weight of the butyl rubber.

[0031] In this invention, the inventors discovered that the type of tackifying resin is closely related to the total amount of the reinforcing agent and the tackifying resin. 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.

[0032] Furthermore, relative to 100 parts by weight of the butyl rubber, the total weight of the reinforcing agent and the tackifying resin is 20-60 parts.

[0033] According to the present invention, the butyl rubber has an unsaturation degree of 0.8-2.2 mol%, preferably 1-2 mol%.

[0034] According to the present invention, the number average molecular weight of the butyl rubber is 120,000 to 300,000, preferably 120,000 to 200,000.

[0035] According to the present invention, the Mooney viscosity ML (1+8min, 125°C) of the butyl rubber is 30-65.

[0036] In this invention, the butyl rubber can be a halogenated butyl rubber, such as chlorinated butyl rubber and / or brominated butyl rubber.

[0037] According to the present invention, the CTAB adsorption specific surface area of ​​the carbon black is 10-600 m². 2 / g.

[0038] 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.

[0039] In this invention, the CTAB adsorption specific surface area of ​​the carbon black is 10-200 m². 2 / g.

[0040] According to the present invention, the activator is a mixture of metal oxide and fatty acid.

[0041] According to the present invention, the mass ratio of the metal oxide to the fatty acid is 2-5:1, preferably 3-5:1;

[0042] According to the present invention, the metal oxide is zinc oxide and / or magnesium oxide; the fatty acid is stearic acid.

[0043] According to the present invention, the vulcanizing agent is selected from sulfur donors.

[0044] 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.

[0045] According to the present invention, the accelerator is selected from at least one of sulfenamide accelerators, thiazole accelerators, thiuram accelerators, and guanidine accelerators.

[0046] 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).

[0047] The second aspect of the present invention provides a method for preparing vulcanized butyl rubber, characterized in that the rubber composition described in the first aspect is mixed and vulcanized.

[0048] In this invention, there are no particular limitations on the method for preparing vulcanized butyl 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.

[0049] 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 butyl rubber with better mechanical and damping properties after vulcanization.

[0050] According to the present invention, the method includes the following steps:

[0051] S1. Butyl rubber, tackifying resin, reinforcing agent and activator are first mixed to obtain compound;

[0052] S2. The compounded rubber, vulcanizing agent and accelerator are mixed a second time to obtain the final compounded rubber.

[0053] S3. The final compound is vulcanized to obtain the vulcanized rubber.

[0054] 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 3-10 min, preferably 3-8 min.

[0055] According to the present invention, the conditions for the second mixing include: the second mixing temperature ≤ 110°C, preferably 35-110°C; and the time is 3-5 min, preferably 3-4 min.

[0056] In this invention, to achieve better results, the discharge temperature of the final rubber compound is ≤110℃.

[0057] 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.

[0058] In this invention, to further obtain vulcanized butyl rubber with superior overall performance, the method can further refine the stepwise mixing of the components in the composition, specifically including:

[0059] S1. Butyl rubber and tackifying resin are first mixed to obtain a first compound;

[0060] S2. The first compound, reinforcing agent and activator are first compounded II to obtain the second compound.

[0061] S3. The second compound, vulcanizing agent and accelerator are mixed for a second time to obtain the final compound.

[0062] S4. The final compound is vulcanized to obtain the vulcanized rubber.

[0063] In this invention, the conditions for the first mixing I include: the temperature of the first mixing I is 40-160℃, preferably 50-130℃; and the time is 0.5-5min, preferably 0.5-3min.

[0064] 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.

[0065] In this invention, the sum of the mixing times of the first mixing I and the first mixing II is 3-15 min, preferably 5-15 min.

[0066] 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.

[0067] In this invention, to achieve better results, the discharge temperature of the final rubber compound is ≤110℃.

[0068] 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.

[0069] In this invention, the vulcanization conditions are the same as those described above, and will not be repeated here.

[0070] Unless otherwise specified, all pressures used in this invention are gauge pressures.

[0071] A third aspect of the present invention provides a vulcanized butyl rubber prepared by the method described in the second aspect.

[0072] The fourth aspect of this invention provides an application of the vulcanized butyl rubber described in the third aspect in damping materials.

[0073] Butyl rubber: Grade 1751, unsaturation 1.74 mol%, Mooney viscosity ML (1+8 min, 125℃) 51, number average molecular weight 236,000, Sinopec Beijing Yanshan Petrochemical Branch;

[0074] Chlorinated butyl rubber, grade 1066, with an unsaturation of 1.7 mol%, Mooney viscosity ML (1+8 min, 125℃) 38, chlorine content of 1.2 ± 0.1%, and number average molecular weight of 188,000, was purchased from Exxon.

[0075] Reinforcing agent: Carbon black N330, CTAB is 82m 2 / g, manufactured by Cabot Corporation.

[0076] Tackifying resin A: Wingtack 95, manufactured by Clayville, USA, industrial grade.

[0077] Tackifying resin B1: Resin HY 2045, produced by Shanxi Provincial Chemical Research Institute, industrial grade.

[0078] Tackifying resin B2: Resin 1102, manufactured by ExxonMobil, industrial grade.

[0079] Tackifying resin B3: Resin 711, Resinall Corporation, USA, industrial grade.

[0080] Tackifying resin B4: Resin 2123, phenolic resin, purchased from Henan Zhongfan Dongsheng New Materials.

[0081] Resin 1045: Thermally reactive octylphenol resin, purchased from Saint-Lacco, USA.

[0082] Activators: Zinc oxide (ZnO), stearic acid (SA), Weifang Hengfeng Chemical Co., Ltd.

[0083] Vulcanizing agent: Sublimed sulfur, Weifang Zhongheng Chemical Co., Ltd.

[0084] Accelerator: N-cyclohexyl-2-benzothiazole sulfenamide (CZ), Tianjin Maofeng Rubber Additives Co., Ltd.

[0085] The equipment used to prepare the vulcanized rubber in the following examples and comparative examples is shown in Table 1.

[0086] The testing instruments for the vulcanized rubbers prepared in the following examples and comparative examples are shown in Table 2.

[0087] The test conditions for the vulcanized rubber prepared in the following examples and comparative examples are shown in Table 3.

[0088] Unless otherwise specified, the temperature ranges in the following examples represent the actual temperature changes as indicated by the temperature monitor during the rubber mixing process.

[0089] Table 1

[0090] 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-Shi Hydraulic Industry Co., Ltd., Taiwan

[0091] Table 2

[0092] 1 Tensile strength GT-AT-3000 Taiwan High Speed ​​Rail Corporation 2 Dynamic viscoelastic properties EPLEXOR500N GABO Germany

[0093] Table 3

[0094]

[0095] Examples 1-6

[0096] The rubber composition shall be compounded according to the formulation in Table 4, as follows:

[0097] S1. Add butyl rubber and tackifying resin into a mixer for the first mixing I. Set the speed of the mixer to 77 rpm and the initial temperature to 60℃. Perform the first mixing I at 60℃ to 110℃ for 0.5 min to obtain the first compound.

[0098] S2. Add the first compound rubber, reinforcing agent, and activator into the internal mixer for first mixing II. Perform first mixing II at 70°C to 130°C for 5 minutes. Discharge the material and let it stand for 4 hours to obtain the second compound rubber.

[0099] S3. Add the second compound, accelerator and vulcanizing agent to the internal mixer for a second mixing at a speed of 60 rpm and an initial temperature of 35°C. The second mixing is carried out at 35°C to 110°C for 4 minutes. The discharge temperature is 110°C. The final compound is then discharged.

[0100] S4. The final rubber compound is pressed into sheets and cut into sheets using a two-roll 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 T. 90 -5min to T 90 After 3 minutes, vulcanized rubber samples S1-S6 were obtained.

[0101] Table 4

[0102]

[0103]

[0104] Example 7

[0105] The method of Example 1 was followed, except that 2045 resin was replaced with Wingtack 95 resin to obtain vulcanized rubber sample S7.

[0106] Example 8

[0107] The method of Example 1 was followed, except that butyl rubber was replaced with chlorinated butyl rubber 1066 to obtain vulcanized rubber sample S8.

[0108] Example 9

[0109] The method of Example 1 was followed, except that carbon black N330 was replaced with N660, and vulcanized rubber sample S9 was obtained.

[0110] Example 10

[0111] The formulation in Example 1 of Table 4 was used to prepare vulcanized rubber according to the following method.

[0112] S1. Add butyl rubber, tackifying resin, reinforcing agent and activator into the internal mixer for the first mixing. Set the speed of the internal mixer to 77 rpm and the initial temperature to 60℃. Mix for 5 minutes at 60℃ to 130℃. Discharge and let stand for 4 hours to obtain the first compound.

[0113] S2. Add the first compound, accelerator and vulcanizing agent to the internal mixer for a second mixing at a speed of 60 rpm and an initial temperature of 35°C. The second mixing is carried out at 35°C to 110°C for 4 minutes. The discharge temperature is 110°C. The final compound is then discharged.

[0114] S3. The final rubber compound is pressed into sheets and cut into sheets using a two-roll mill, and then placed in a flat vulcanizing machine for vulcanization. The vulcanization temperature is 160℃, the vulcanization pressure is 15MPa, and the vulcanization time is T. 90 -5min to T 90 After 3 minutes, vulcanized rubber sample S10 was obtained.

[0115] Example 11

[0116] The method of Example 1 was followed, except that the amount of carbon black was changed to 40 parts, and vulcanized rubber sample S11 was obtained.

[0117] Example 12

[0118] The method of Example 1 was followed, except that 20 parts of tackifying resin A and 2 parts of tackifying resin B were used to prepare vulcanized rubber sample S12.

[0119] Example 13

[0120] The method of Example 1 was followed, except that the tackifying resin B was 2123 resin, and vulcanized rubber sample S13 was obtained.

[0121] Comparative Example 1

[0122] The method of Example 1 was followed, except that no tackifying resin was used to prepare vulcanized rubber sample D1.

[0123] Comparative Example 2

[0124] The method of Example 1 was followed, except that tackifying resin B was not included and tackifying resin A was replaced with 5 parts to obtain vulcanized rubber sample D2.

[0125] Comparative Example 3

[0126] The method of Example 1 was followed, except that tackifying resin A and tackifying resin B were replaced with resin 1045 of 30, and vulcanized rubber sample D3 was obtained.

[0127] Comparative Example 4

[0128] The method of Example 1 was followed, except that tackifying resin B was not included and tackifying resin A was replaced with 50 parts to obtain vulcanized rubber sample D4.

[0129] Test case

[0130] The rubber samples prepared in the examples and comparative examples were subjected to performance tests, and the results are shown in Table 5.

[0131] Table 5

[0132]

[0133] The results above show that the embodiments 1-13 of the present invention have good effects. Under the premise of meeting the tensile strength of not less than 10 MPa, it has a wider temperature range, with a temperature difference of not less than 104.6 and a loss factor of not less than 1.1. It has a wide temperature range and good mechanical and damping properties.

[0134] 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 butyl rubber composition, characterized in that, The composition comprises, by weight, 100 parts butyl rubber, 10-30 parts reinforcing agent, 10-30 parts tackifying resin, 4-8 parts activator, 0.5-2 parts vulcanizing agent and 1-2.5 parts accelerator; The tackifying resin includes tackifying resin A and tackifying resin B; The tackifying resin A is a C5 resin; the tackifying resin B is selected from at least one of octylphenol aldehyde resin, brominated octylphenol aldehyde resin, epoxy resin and aliphatic hydrocarbon resin. The C5 resin is selected from at least one of Wingtack 95 resin, Wingtack 10 resin, and Wingtack 98 resin; The aliphatic hydrocarbon resin is selected from at least one of resin 1102 and resin 1202.

2. The butyl rubber composition according to claim 1, wherein, The reinforcing agent is carbon black.

3. The butyl rubber composition according to claim 1 or 2, wherein, The mass ratio of the tackifying resin A to the tackifying resin B is 1-5:

1.

4. The butyl rubber composition according to claim 1 or 2, wherein, The mass ratio of the tackifying resin A to the tackifying resin B is 1-4:

1.

5. The butyl rubber composition according to claim 1 or 2, wherein, The total weight of the reinforcing agent and the tackifying resin is 15-70 parts relative to 100 parts by weight of the butyl rubber.

6. The butyl rubber composition according to claim 1 or 2, wherein, The total weight of the reinforcing agent and the tackifying resin is 20-60 parts relative to 100 parts by weight of the butyl rubber.

7. The butyl rubber composition according to claim 1 or 2, wherein, The butyl rubber has an unsaturation degree of 0.8-2.2 mol%.

8. The butyl rubber composition according to claim 1 or 2, wherein, The butyl rubber has an unsaturation degree of 1-2 mol%.

9. The butyl rubber composition according to claim 1 or 2, wherein, The butyl rubber has a Mooney viscosity of 30-65 at 125°C for 1+8 min.

10. The butyl rubber composition according to claim 1 or 2, wherein, The number-average molecular weight of the butyl rubber is 120,000 to 300,000.

11. The butyl rubber composition according to claim 1 or 2, wherein, The number-average molecular weight of the butyl rubber is 120,000 to 200,000.

12. The butyl rubber composition according to claim 2, wherein, The carbon black has a CTAB adsorption specific surface area of ​​10-600 m². 2 / g.

13. The butyl rubber composition according to claim 2, wherein, The CTAB adsorption specific surface area of ​​the carbon black is 10-200 m². 2 / g.

14. The butyl rubber composition according to claim 1 or 2, wherein, The activator is a mixture of metal oxides and fatty acids.

15. The butyl rubber composition according to claim 14, wherein, The mass ratio of the metal oxide to the fatty acid is 2-5:

1.

16. The butyl rubber composition according to claim 14, wherein, The mass ratio of the metal oxide to the fatty acid is 3-5:

1.

17. The butyl rubber composition according to claim 14, wherein, The metal oxide is zinc oxide and / or magnesium oxide; the fatty acid is stearic acid.

18. The butyl rubber composition according to claim 1 or 2, wherein, The vulcanizing agent is selected from sulfur donors.

19. The butyl rubber composition according to claim 1 or 2, wherein, The vulcanizing agent is selected from at least one of sublimed sulfur, insoluble sulfur, soluble sulfur, and oil-extended sulfur.

20. The butyl rubber composition according to claim 1 or 2, wherein, The accelerator is selected from at least one of sulfenamide accelerators, thiazole accelerators, thiuram accelerators, and guanidine accelerators.

21. A method for preparing vulcanized butyl rubber, characterized in that, The butyl rubber composition according to any one of claims 1-20 is compounded and vulcanized.

22. The method according to claim 21, wherein, The method includes the following steps: S1. Butyl rubber, tackifying resin, reinforcing agent 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 butyl rubber.

23. The method according to claim 22, wherein, The conditions for the first mixing process include: a mixing temperature of 40-160℃ and a mixing time of 3-10 minutes.

24. The method according to claim 22, wherein, The conditions for the first mixing process include: a mixing temperature of 50-160℃ and a mixing time of 3-8 minutes.

25. The method according to claim 22, wherein, The conditions for the second mixing process include: the second mixing temperature ≤ 110℃; and the time 3-5 min.

26. The method according to claim 22, wherein, The conditions for the second mixing process include: a mixing temperature of 35-110℃ and a mixing time of 3-4 minutes.

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

28. The method according to claim 22, wherein, The vulcanization conditions include: a temperature of 150-160℃; a pressure of 8-15MPa; and a time of 15-30min.

29. A vulcanized butyl rubber prepared by the method according to any one of claims 21-28.

30. The application of the vulcanized butyl rubber according to claim 29 in damping materials.

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