A dibenzylideneacetone modified hydrophobic butyl rubber damping composite material and preparation method thereof

Abstract

The invention belongs to the field of polymer-based damping materials, and discloses a dibenzylideneacetone modified hydrophobic butyl rubber damping composite material and a preparation method thereof. Butyl rubber, sodium hydride, and dibenzylideneacetone are reacted in torque rheology for a period of time, and then the rubber is mixed on a double-roll mixer, and stearic acid, zinc oxide, tetramethylthiuram disulfide, dibenzothiazole disulfide, sulfur powder, lignin-modified phenolic resin, and filler montmorillonite are added in order until the roll is wrapped and mixed evenly, and the raw rubber is removed and placed for 24-36h to remove bubbles to obtain raw rubber; The raw rubber is vulcanized on a flat vulcanizer to obtain a hydrophobic butyl rubber damping composite material. The present invention adds lignin-modified phenolic resin and solvent-free modified butyl rubber, which is green and environmentally friendly, simple to operate, introduces a benzene ring rigid group, broadens the butyl rubber damping temperature range, improves the damping factor, and makes the damping material have hydrophobic properties, broadens the application field of butyl rubber damping materials.

Description

Technical Field

[0001] The invention relates to a dibenzylideneacetone modified hydrophobic butyl rubber damping composite material and a preparation method thereof, and belongs to the field of polymer-based damping materials. Background Art

[0002] At present, many new materials and technologies have been continuously applied to damping and shock absorption. Among them, polymer materials, especially rubber damping and shock absorption materials, have attracted more and more attention due to their excellent performance. The use of rubber damping materials can minimize mechanical noise and reduce mechanical vibration, improve work efficiency, and improve product quality. Some commonly used asphalt-based damping pads for vehicles will emit carcinogens such as naphthalene, anthracene, and phenanthrene when used, and the damping effect is relatively poor, which cannot meet the requirements of our comfortable, healthy, and quiet travel experience. Polymer-based damping materials greatly reduce the emission of toxic substances in the car, have good damping effects at room temperature and above, and can also use renewable raw materials. It has the advantages of sustainable development, safety, health, and environmental protection.

[0003] Water exists in every corner of nature, but in some areas, water is not expected to exist for a long time, so hydrophobic materials are needed. Hydrophobic materials have a wide range of applications and appear in all aspects of life, including aerospace, military industry, transportation, agriculture, construction, medical treatment, daily textiles, etc., and the prospects are very broad. The contact angle of hydrophobic materials is generally above 90°, and their preparation mainly revolves around two aspects. On the one hand, low surface energy substances are added to the material, such as substances containing long alkyl chains or fluorine-containing substances, and on the other hand, a rough surface with a micro-nano structure is prepared. However, these two methods of preparing hydrophobic materials have advantages and disadvantages. Generally, the current industrial production of hydrophobic materials mainly involves adding hydrophobic masterbatch, that is, adding low surface energy substances, but the hydrophobic effect of this method is general and can only meet general hydrophobic requirements. The method of preparing hydrophobic materials by constructing a rough interface, although the prepared hydrophobic material has a better effect, the preparation process is relatively cumbersome, and the rough interface is easily damaged, which greatly reduces the hydrophobic effect and needs to be replaced regularly, so the cost is relatively high. At present, the ideal preparation method for producing hydrophobic materials generally combines the two aspects to play a synergistic role, that is, not only constructing a rough surface, but also covering its surface with low surface energy substances, but the process is relatively speaking, and has not yet reached the capacity of full industrialization and large-scale production.

[0004] For traditional asphalt-based or viscoelastic damping materials, since butyl rubber contains polar functional groups and is generally a hydrophilic material, moisture absorption often occurs during use, and the poor thermal stability leads to a short service life of traditional damping materials. It is imperative to develop a damping material with good moisture resistance and high thermal stability. However, there are few literatures on the hydrophobicity of damping materials. Chen Bo from Beijing University of Chemical Technology (Chen Bo. Study on silicone-modified polybutadiene-based polyurethane damping materials and properties [D], Beijing University of Chemical Technology, 2017) used terminal hydroxyl polydimethylsiloxane (HTPDMS) and terminal hydroxyl polybutadiene (HTPB) as blended soft segments to carry out block copolymerization with diphenylmethane diisocyanate (MDI), dipropylene glycol (DPG) and propylene glycol (GLY) as chain extenders, and prepared PU damping materials by prepolymer method and casting. The hydrophobicity of the material surface was increased, and heptamethyl trisiloxane grafted terminal hydroxyl polybutadiene (HTMS-g-HTPB) and polytetramethylene ether diol (PTMEG2000) were used as mixed segments, and then mixed with diphenylmethane diisocyanate (MDI) and chain extender dipropylene glycol (DPG) through prepolymer method to prepare polyurethane damping elastomer. By adjusting the ratio between the two phases of the soft segment, as the content of HMTS-g-HTPB increases, the mechanical properties of the material are comprehensively improved and the surface hydrophobicity is enhanced. Zang Yu (Zang Yu, Lei Tianyang, Aoki Toshiki, et al. Research on Polyester Modified by Grafting of Fluorinated Acrylic Macromonomers [J]. Journal of Qiqihar University (Natural Science Edition), 2020, 36(03): 77-80) et al. studied the effect of grafting fluorinated side chains of methyl methacrylate and tridecyl methacrylate on the hydrophilicity of the material and found that the contact angle of the material increased to 128.8° after grafting modification, changing from a hydrophilic material to a hydrophobic material. Although these two methods can improve the hydrophobic properties of damping materials, the preparation of damping materials is too complicated and the price is high, which limits their industrial application. Summary of the invention

[0005] The invention aims to provide a preparation method of a dibenzylideneacetone modified hydrophobic butyl rubber damping composite material. By adding a bio-based phenolic resin, the butyl rubber is activated and modified with NaH, and a rigid group benzene ring is introduced at the same time, so as to broaden the damping temperature range of the butyl rubber, improve the damping performance, prepare a green and environmentally friendly hydrophobic damping composite material, and the operation is simple.

[0006] The technical solution of the present invention is:

[0007] The present invention provides a method for preparing a dibenzylideneacetone modified hydrophobic butyl rubber damping composite material, comprising the following steps:

[0008] Step 1, adding butyl rubber (IIR) and NaH in proportion to a torque rheometer and reacting for 10-15 minutes, then adding dibenzylideneacetone and continuing the reaction for 10-15 minutes, after the reaction is completed, taking out the rubber;

[0009] Step 2, plasticizing the rubber obtained in step 1 on a double-roll mixer, adding stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin, and filler montmorillonite in sequence, blending evenly, making triangle packages, thinning, putting down sheets, leaving for 24-36 hours to remove bubbles, and obtaining raw rubber;

[0010] Step 3: vulcanize the raw rubber obtained in step 2 on a flat vulcanizer to obtain a wide temperature range hydrophobic butyl rubber damping composite material.

[0011] In step 1, the butyl rubber is 100 parts, the dibenzylideneacetone is 5-20 parts, and the NaH is 5-20 parts by mass.

[0012] In step 2, by mass, the lignin-based phenolic resin is 10-20 parts, the montmorillonite filler is 20-40 parts, stearic acid is 1-3 parts, zinc oxide is 3-7 parts, TMTD is 1-4 parts, DM is 0.5-2 parts, and sulfur powder is 1-4 parts.

[0013] In step 3, the vulcanization temperature is 140-160° C., and the vulcanization pressure is 10-16 MPa.

[0014] The beneficial effects of the present invention are:

[0015] Using lignin to replace part of petroleum raw materials to synthesize biomass-based phenolic resin can not only make full use of renewable resources, but also reduce environmental pollution. Using lignin to replace phenol to synthesize phenolic resin has become an important direction to solve the problems of resin environmental protection and reproducibility.

[0016] The biggest advantage of chemically modifying the rubber during processing is that the reaction can be carried out in common rubber processing equipment (such as torque rheometer, internal mixer, etc.). It is a solvent-free modification method with simple preparation process and low requirements for experimental equipment.

[0017] The butyl rubber damping composite material prepared by the present invention solves the problem that the traditional asphalt-based damping material has poor damping effect at room temperature and above, broadens the damping temperature range, improves the damping factor, prepares a new type of hydrophobic butyl rubber damping composite material, and further broadens the application field of the damping composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the tanδ-T relationship curve of pure butyl rubber;

[0019] Figure 2This is the water contact angle diagram of butyl rubber after adding 10 parts of lignin-modified phenolic resin to Comparative Example 1;

[0020] Figure 3 This is the water contact angle diagram of butyl rubber after adding 20 parts of lignin-modified phenolic resin to Comparative Example 2;

[0021] Figure 4 The tanδ-T relationship curve of the damping rubber with added lignin phenolic resin; 1-Comparative Example 1; 2-Comparative Example 2;

[0022] Figure 5 This is the water contact angle diagram of butyl rubber after adding 15 parts of dibenzylideneacetone in Example 3;

[0023] Figure 6 The tanδ-T relationship curve of the damping rubbers 1-4 in the embodiments; Figure 7 1 is the infrared spectra of the damping composite materials obtained with different additives, wherein 1 is pure butyl rubber; 2 is comparative example 1 with filler and bio-based phenolic resin added; 3 is example 1 with NaH and dibenzylideneacetone added; 4 is comparative example 4 with dibenzylideneacetone added but without NaH. DETAILED DESCRIPTION

[0024] The butyl rubber (100 parts) and NaH (5-20 parts) were added to the torque rheometer for reaction for 10-15 minutes, and then dibenzylideneacetone (5-20 parts) was added to continue the reaction for 10-15 minutes. After the reaction was completed, the rubber was taken out; the obtained rubber was plasticized on a double-roll mixer, and stearic acid (1-3 parts), zinc oxide (3-7 parts), tetramethylthiuram (TMTD) (1-4 parts), tetramethylthiuram disulfide (D M) (0.5-2 parts), sulfur (1-4 parts), lignin-based phenolic resin (10-20 parts), and filler montmorillonite (20-40 parts) are evenly blended, packaged in a triangle, thinned, and sliced, and placed for 24-36 hours to remove bubbles to obtain raw rubber; finally, the obtained raw rubber is vulcanized on a flat vulcanizer at a vulcanization temperature (140-160°C) and a vulcanization pressure (10-16MPa) to obtain a wide-temperature range hydrophobic butyl rubber damping composite material.

[0025] The present invention will be further described in detail below in conjunction with specific embodiments. The specific embodiments described are only used to explain the present invention and are not used to limit the present invention. Throughout the specification, references to "one embodiment", "embodiment", "one example" or "example" mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment", "embodiment", "one example" or "example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example.

[0026] Figure 1 is the tanδ-T relationship curve of pure butyl rubber; Figure 1 It can be seen that pure butyl rubber has poor damping effect at room temperature and above.

[0027] Comparative Example 1:

[0028] Take 100 parts of butyl rubber, 10 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0029] The butyl rubber is plasticized on a double-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin and filler montmorillonite are added in sequence, mixed evenly, packed in triangles, thinned, and sliced. The raw rubber is left for 24 hours to remove bubbles to obtain raw rubber. Finally, the raw rubber is vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C, a vulcanization pressure of 14 MPa, and a vulcanization time of 16 minutes to obtain a butyl rubber damping composite material with a wide temperature range.

[0030] The high temperature damping temperature range of the modified butyl rubber prepared in Comparative Example 1 is greater than 60°C, and the damping factor at 60°C is 0.33. Figure 4 Curve 1. The water contact angle is 86.9°, and it does not show hydrophobic properties, such as Figure 2 .

[0031] Comparative Example 2:

[0032] Take 100 parts of butyl rubber, 20 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0033] The butyl rubber is plasticized on a double-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin and filler montmorillonite are added in sequence, mixed evenly, packed in triangles, thinned, and sliced. The raw rubber is left for 24 hours to remove bubbles to obtain raw rubber. Finally, the raw rubber is vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C, a vulcanization pressure of 14 MPa, and a vulcanization time of 16 minutes to obtain a butyl rubber damping composite material with a wide temperature range.

[0034] The high temperature damping temperature range of the modified butyl rubber prepared in Comparative Example 2 is greater than 60°C, and the damping factor at 60°C is 0.31. Figure 4 Curve 2; the water contact angle is 80.2°, and it does not show hydrophobic properties, such as Figure 3 .

[0035] from Figure 2 , 3It can be seen that after adding lignin-modified phenolic resin, the damping composite material does not show hydrophobic properties because the lignin-modified phenolic resin contains a certain amount of hydroxyl groups on the modified resin molecular chain.

[0036] Embodiment 1:

[0037] Take 100 parts of butyl rubber, 5 parts of dibenzylideneacetone, 5 parts of NaH, 10 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0038] Butyl rubber and NaH were added into a torque rheometer to react for 10 minutes, and then dibenzylideneacetone was added to continue the reaction for 10 minutes. After the reaction was completed, the rubber was taken out; the obtained rubber was plasticized on a two-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin, and filler montmorillonite were added in sequence, blended evenly, made into triangular packages, thinly passed, and placed on a sheet for 24 hours to remove bubbles to obtain raw rubber; finally, the obtained raw rubber was vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C and a vulcanization pressure of 14 MPa to obtain a wide temperature range hydrophobic butyl rubber damping composite material.

[0039] The high temperature damping temperature range of the modified butyl rubber prepared in Example 1 is ≥70°C, and the damping factor at 70°C is 0.30. Figure 6 Curve 1; water contact angle is 94.6°

[0040] Embodiment 2:

[0041] Take 100 parts of butyl rubber, 10 parts of dibenzylideneacetone, 10 parts of NaH, 10 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0042] Butyl rubber and NaH were added into a torque rheometer to react for 10 minutes, and then dibenzylideneacetone was added to continue the reaction for 10 minutes. After the reaction was completed, the rubber was taken out; the obtained rubber was plasticized on a two-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin, and filler montmorillonite were added in sequence, blended evenly, made into triangular packages, thinly passed, and placed on a sheet for 24 hours to remove bubbles to obtain raw rubber; finally, the obtained raw rubber was vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C and a vulcanization pressure of 14 MPa to obtain a wide temperature range hydrophobic butyl rubber damping composite material.

[0043] The high temperature damping temperature range of the modified butyl rubber prepared in Example 2 is greater than 70°C, and the damping factor at 70°C is 0.35. Figure 6 Curve 2; water contact angle is 97.8°

[0044] Embodiment 3:

[0045] Take 100 parts of butyl rubber, 15 parts of dibenzylideneacetone, 15 parts of NaH, 10 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0046] Butyl rubber and NaH were added into a torque rheometer to react for 10 minutes, and then dibenzylideneacetone was added to continue the reaction for 10 minutes. After the reaction was completed, the rubber was taken out; the obtained rubber was plasticized on a two-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin, and filler montmorillonite were added in sequence, blended evenly, made into triangular packages, thinly passed, and placed on a sheet for 24 hours to remove bubbles to obtain raw rubber; finally, the obtained raw rubber was vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C and a vulcanization pressure of 14 MPa to obtain a wide temperature range hydrophobic butyl rubber damping composite material.

[0047] The high temperature damping temperature range of the modified butyl rubber prepared in Example 3 is greater than 70°C, and the damping factor at 70°C is 0.37. Figure 6 Curve 3; water contact angle is 101.9°

[0048] Embodiment 4:

[0049] Take 100 parts of butyl rubber, 20 parts of dibenzylideneacetone, 20 parts of NaH, 10 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0050] Butyl rubber and NaH were added into a torque rheometer to react for 10 minutes, and then dibenzylideneacetone was added to continue the reaction for 10 minutes. After the reaction was completed, the rubber was taken out; the obtained rubber was plasticized on a double-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin, and filler montmorillonite were added in sequence, blended evenly, made into triangular packages, thinly passed, and placed on a sheet for 24 hours to remove bubbles to obtain raw rubber; finally, the obtained raw rubber was vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C and a vulcanization pressure of 14 MPa to obtain a wide temperature range hydrophobic butyl rubber damping composite material.

[0051] The high temperature damping temperature range of the modified butyl rubber prepared in Example 4 is greater than 70°C, and the damping factor at 70°C is 0.35. Figure 6 Curve 4; the water contact angle is 103.1°, such as Figure 5 .

[0052] from Figure 5It can be seen that by adding lignin-modified phenolic resin and NaH-activated modified butyl rubber, a large number of rigid group benzene rings are introduced into the main chain of butyl rubber. Due to the presence of a large number of aromatic group benzene rings, the damping composite material has hydrophobic properties.

[0053] from Figure 6 It can be seen that with the increase of the amount of dibenzylideneacetone added to the NaH activated modified butyl rubber, the damping temperature range and damping factor of the damping composite material are improved. When 15 parts of dibenzylideneacetone are added in Example 3, the damping factor can be as high as 0.37 at a temperature of 75°C. The addition of lignin modified phenolic resin combined with NaH activated and introduced rigid group benzene ring modified butyl rubber can improve the damping performance of butyl rubber, broaden the damping temperature range, and make the damping composite material have hydrophobic properties.

[0054] Comparative Example 3:

[0055] Take 100 parts of butyl rubber, 10 parts of NaH, 10 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0056] Butyl rubber and NaH were added into a torque rheometer to react for 10 minutes. After the reaction, the rubber was taken out. The obtained rubber was plasticized on a two-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin, and filler montmorillonite were added in sequence, mixed evenly, made into triangular packages, thinly passed, and placed on sheets for 24 hours to remove bubbles to obtain raw rubber. Finally, the obtained raw rubber was vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C and a vulcanization pressure of 14 MPa to obtain a wide temperature range butyl rubber damping composite material.

[0057] The modified butyl rubber prepared in Comparative Example 3 has a high-temperature damping temperature range of ≥60°C, a damping factor of 0.31 at 60°C, and a water contact angle of 82.4°.

[0058] Comparative Example 4:

[0059] Take 100 parts of butyl rubber, 10 parts of dibenzoylmethane, 10 parts of lignin-based phenolic resin, 30 parts of filler montmorillonite, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of TMTD, 1 part of DM, and 2 parts of sulfur powder.

[0060] Butyl rubber and NaH were added into a torque rheometer to react for 10 minutes. After the reaction, the rubber was taken out. The obtained rubber was plasticized on a two-roll mixer, and stearic acid, zinc oxide, TMTD, DM, sulfur powder, lignin-based phenolic resin, and filler montmorillonite were added in sequence, mixed evenly, made into triangular packages, thinly passed, and placed on sheets for 24 hours to remove bubbles to obtain raw rubber. Finally, the obtained raw rubber was vulcanized on a flat vulcanizer at a vulcanization temperature of 160°C and a vulcanization pressure of 14 MPa to obtain a wide temperature range butyl rubber damping composite material.

[0061] The wide temperature range damping hydrophobic butyl rubber prepared by the methods described in Examples 1-4 and Comparative Examples 1-3 of the present invention is compared with the butyl rubber to which only lignin phenolic resin and filler are added. For specific performance, please refer to Figure 1-7 And Table 1

[0062] Table 1

[0063]

[0064]

[0065] From Table 1 and Figure 4 It can be seen that after adding lignin-modified phenolic resin, the tensile strength and fracture strength of the damping composite material are improved. Adding lignin-modified phenolic resin can improve the damping performance of butyl rubber composite materials. The large number of polar hydroxyl groups contained in the molecular chain of lignin-modified phenolic resin enter the rubber matrix, which significantly enhances the internal friction force of the molecular chain movement. Lignin-modified phenolic resin and butyl rubber penetrate each other and have a certain interpenetrating network structure.

[0066] from Figure 7 It can be seen from the figure that, by comparing curve 1 and curve 2, the addition of lignin-modified phenolic resin and filler montmorillonite did not change the main chain structure of butyl rubber; curve 3 is the introduction of dibenzylacetone into butyl rubber by using NaH to activate butyl rubber, and curve 4 only adds dibenzylacetone without using NaH to activate the double bonds in butyl rubber. By comparison, it can be found that the unsaturated double bond functional groups and rigid group benzene rings are introduced into the main chain of the macromolecule.

[0067] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for preparing a dibenzylideneacetone modified hydrophobic butyl rubber damping composite material, characterized in that: The steps include: (1) Add butyl rubber and NaH in proportion to a torque rheometer and react for 10-15 minutes, then add dibenzylideneacetone and continue to react for 10-15 minutes. After the reaction is completed, take out the rubber; Wherein, by weight, the butyl rubber is 100 parts, the dibenzylideneacetone is 5-20 parts, and the NaH is 5-20 parts; (2) plasticizing the rubber obtained in step (1) on a two-roll mixer, adding stearic acid, zinc oxide, tetramethylthiuram TMTD, tetramethylthiuram disulfide DM, sulfur, lignin-based phenolic resin, and filler montmorillonite in sequence, blending evenly, making triangle packages, thinning, putting down sheets, and leaving them to remove bubbles to obtain raw rubber; 100 parts of butyl rubber, 20-40 parts of montmorillonite filler, 10-20 parts of lignin modified phenolic resin, 1-3 parts of stearic acid, 3-7 parts of zinc oxide, 1-4 parts of TMTD, 0.5-2 parts of DM, and 1-4 parts of sulfur powder; (3) vulcanizing the raw rubber obtained in step (2) on a flat vulcanizer to obtain a wide temperature range damping hydrophobic butyl rubber.

2. The preparation method according to claim 1, characterized in that: In step (2), the bubble removal time is 24-36 hours.

3. The preparation method according to claim 1, characterized in that: In step (3), the vulcanization temperature is 140-160° C. and the vulcanization pressure is 10-16 MPa.

4. A dibenzylideneacetone modified hydrophobic butyl rubber damping composite material, characterized in that: The composite material is prepared by the preparation method described in any one of claims 1 to 3.

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