Special mute cotton for tire

Abstract

The invention discloses special mute cotton for tires, which comprises a mute layer and a back adhesive tape, and the back adhesive tape is prepared from the following substances in parts by mass: 80-100 parts of styrene-butadiene-styrene block copolymer, 50-60 parts of tackifier, 20-30 parts of naphthenic oil, 5-15 parts of adsorbent, 1-2 parts of antioxidant 1520 and 1-2 parts of cross-linking agent. The prepared mute cotton does not need laser treatment and polishing, can effectively absorb a release agent on the inner wall of a tire, the bonding effect can reach cohesive failure of a self-adhesive layer, revolutionary change is achieved, tire agents, tire stores and even vehicle owners can operate the mute cotton by themselves, equipment assistance is not needed, construction is simple, cost is low, and large-scale popularization can be achieved.

Description

Technical Field

[0001] This invention relates to the field of sound-absorbing cotton technology, specifically a type of sound-absorbing cotton for tires. Background Technology

[0002] With the increasing number of new energy vehicles, the demand for quiet tires is rising due to the absence of engine noise. As a result, tires with sound-absorbing cotton have become a new market favorite. However, the application and selection of sound-absorbing cotton remain challenges for the industry.

[0003] In tire manufacturing, tire release agents are indispensable auxiliary materials. Among them, silicone oil-based tire release agents are widely used due to their excellent release effect. However, these release agents can remain on the tire surface during use, adversely affecting subsequent processing and applications. For example, residual silicone oil can reduce the adhesion between the tire and other components, affecting the overall quality and service life of the tire. Currently, existing self-adhesive materials on the market have many shortcomings in handling silicone oil-based tire release agents. Some self-adhesive materials cannot effectively absorb silicone oil, causing it to accumulate on the self-adhesive surface and damaging its adhesive properties. In addition, some self-adhesive materials have poor temperature resistance, easily undergoing performance changes in high or low temperature environments, such as softening at high temperatures and becoming brittle at low temperatures, thus affecting their performance. Moreover, the tear strength and adhesive-peel strength of existing self-adhesive materials often do not meet the requirements of practical applications, easily leading to tearing and peeling problems during use.

[0004] The current mainstream approach is to treat the inner wall of the tire with laser cleaning or laser grinding machines, and then attach it with acrylic double-sided tape or structural adhesive as an intermediate layer. The disadvantages are that the construction requirements are high, the equipment is expensive, the processing technology is complex and the construction cost is high, and there are high restrictions on the site, which makes it difficult to popularize in the market.

[0005] CN 119189325 A discloses a noise-reducing cotton tire and its production method. The production method includes the following steps: a tire cavity cleaning step: cleaning the tire cavity to remove residual substances; an adhesive spraying step: spraying adhesive into the tire cavity; and a noise-reducing cotton bonding step: bonding the noise-reducing cotton to the adhesive-coated tire cavity to obtain the noise-reducing cotton tire. In the noise-reducing cotton bonding step, 7-9 sections of noise-reducing cotton are bonded. The noise-reducing cotton tire produced using the method of this invention can effectively reduce the noise inside the tire cavity and the noise from tire-ground friction, achieving a noise reduction effect. Compared with noise-reducing cotton tires produced by other methods, it can reduce noise by up to 8-9 decibels in the 200-352Hz frequency range and by 1-5 decibels in other noise frequency ranges. However, the manufacturing process is complex, and the effect is not ideal.

[0006] Therefore, developing a self-adhesive layer material that can effectively absorb silicone oil-containing tire release agents, while possessing good temperature resistance, high tear strength, and high adhesive-peel strength, along with its matching sound-absorbing cotton, is of significant practical importance. Summary of the Invention

[0007] This patent provides a tire-specific sound-absorbing cotton, comprising a sound-absorbing layer and an adhesive strip. The adhesive strip is composed of the following components in parts by weight: 80-100 parts of styrene-butadiene-styrene block copolymer, 50-60 parts of tackifier, 20-30 parts of naphthenic oil, 5-15 parts of adsorbent, 1-2 parts of antioxidant 1520, and 1-2 parts of crosslinking agent. The styrene-butadiene-styrene block copolymer possesses excellent elasticity and adhesive properties. Its unique block structure allows it to exhibit rubber-like elasticity at room temperature and melt and flow like plastic at high temperatures, facilitating processing and molding. In the adhesive strip, the styrene-butadiene-styrene block copolymer serves as the main framework, providing basic mechanical and adhesive properties. The naphthenic oil exhibits good low-temperature performance and compatibility, reducing the hardness and viscosity of the self-adhesive layer and improving its flexibility and processing performance. Simultaneously, the naphthenic oil also improves the aging resistance of the self-adhesive layer, extending its service life.

[0008] Furthermore, the sound-absorbing layer is composed of the following components in parts by weight: 40-60 parts polyurethane foam, 20-30 parts sound-absorbing fiber, 5-10 parts flame retardant, 3-8 parts high-temperature resistant additive, and 2-5 parts binder. Polyurethane foam is the main matrix material of the tire sound-absorbing cotton, possessing excellent sound absorption performance and elasticity. Its porous structure effectively absorbs sound waves, converting sound energy into heat energy, thereby achieving noise reduction.

[0009] Furthermore, the styrene-butadiene-styrene block copolymer is a hyperbranched polyimide-modified styrene-butadiene-styrene block copolymer, replacing the traditional styrene-butadiene-styrene block copolymer as the main polymer. By introducing hyperbranched polyimide segments, its rigid aromatic ring structure can form physical crosslinking points, raising the upper temperature resistance limit to 200℃, while imparting high tear strength and creep resistance. It forms a multi-linked network with borate ester crosslinking agents, improving performance. Its preparation method includes the following steps: S11. The styrene-butadiene-styrene block copolymer is dissolved in 5 times its mass of toluene, and then 0.3 times its mass of epichlorohydrin and 0.02 times its mass of triethylamine catalyst are added. The reaction is carried out at 50~65℃ for 3 hours. The solvent is removed and the product is dried to obtain the epoxidized styrene-butadiene-styrene block copolymer. S12. Pyromellitic dianhydride and 1.33 times its mass of tris(4-aminophenyl)amine are dissolved in 5 times its mass of N-methylpyrrolidone. Under nitrogen protection, the mixture is stirred at 80°C for 4 hours to generate hyperbranched polyamic acid. The temperature is then raised to 180°C to dehydrate and close the ring to generate hyperbranched polyimide. S13. Dissolve the epoxidized styrene-butadiene-styrene block copolymer obtained in step S11 in 2 to 6 times its mass of N-methylpyrrolidone, add the hyperbranched polyimide obtained in step S12, and then add 0.01 to 0.1 times its mass of triphenylphosphine catalyst. React at 110 to 130°C for 10 to 15 hours, cool down the reaction solution, add ethanol to precipitate the precipitate, filter, wash, and dry to obtain hyperbranched polyimide-modified styrene-butadiene-styrene block copolymer.

[0010] Furthermore, the tackifier is a mixture of hydrogenated petroleum resin or epoxidized soybean oil acrylate and terpene resin. Hydrogenated petroleum resin has excellent tackifying effects, improving the bond strength between the self-adhesive layer and the adherend. It exhibits good compatibility with styrene-butadiene-styrene block copolymers, allowing for uniform dispersion within the styrene-butadiene-styrene block copolymer matrix, enhancing the cohesiveness and tackiness of the self-adhesive layer. The mixture of epoxidized soybean oil acrylate and terpene resin combines the high tackiness of terpene resin with the aging resistance of epoxy resin. Terpene segments penetrate into the micropores of the adherend surface, while epoxy segments form an interpenetrating network with the dynamic crosslinking agent, achieving a dual "anchoring-locking" bonding method.

[0011] Furthermore, the adsorbent is a mixture of nano-montmorillonite and silica aerogel, with a mass ratio of 1:1. Nano-montmorillonite possesses a large specific surface area and abundant pore structure, enabling it to effectively adsorb silicone-containing tire release agents. The nanostructure enhances the adsorption capacity for silicone oil, and its synergistic effect with silica aerogel constructs a three-dimensional aerogel network, further enhancing the adsorption capacity. This three-dimensional network structure also possesses some sound-absorbing properties.

[0012] Furthermore, the crosslinking agent is 1,3,5-tris(4-boronic acid phenyl)benzene. This can impart a self-healing function to the adhesive strip; after the borate ester bonds at the crack break, it can be re-crosslinked at high temperature to restore its strength.

[0013] Furthermore, the polyurethane foam is a graphene-polyurethane composite foam.

[0014] Furthermore, the sound-absorbing fiber is polyester fiber, the flame retardant is aluminum hydroxide, the high-temperature resistant additive is mica powder, and the binder is epoxy resin binder. Polyester fiber further enhances the sound absorption performance of the sound-absorbing cotton. The microchannels formed between the fibers increase the reflection and scattering of sound waves, lengthening the propagation path of sound waves within the sound-absorbing cotton and improving sound absorption efficiency. Aluminum hydroxide decomposes and absorbs heat when heated, lowering the ambient temperature. Simultaneously, the water vapor produced by decomposition dilutes the oxygen concentration, acting as a flame retardant. This ensures the sound absorption performance of the sound-absorbing cotton while improving its safety, forming a stable material system with other components. Mica powder enhances the high-temperature resistance of the tire sound-absorbing cotton, enabling it to maintain a stable structure and performance under high-temperature conditions, preventing deformation and detachment.

[0015] The preparation method of the adhesive strip for the tire-specific sound-absorbing cotton mentioned above is as follows: S21. Styrene-butadiene-styrene block copolymer, tackifier, naphthenic oil, adsorbent and antioxidant 1520 are added to a high-speed mixer in proportion and stirred and mixed evenly at room temperature to obtain mixture A; S22. Add the crosslinking agent to mixture A obtained in step S21, and continue stirring to mix evenly to obtain mixture B; S23. Add mixture B to a twin-screw extruder and extrude to obtain adhesive strips.

[0016] The preparation method of the sound-absorbing layer of the above-mentioned tire-specific sound-absorbing cotton is as follows: S31. Pulverize polyurethane foam into fine particles, and add it together with sound-absorbing fibers, flame retardant, and high-temperature resistant additives into a high-speed mixer and stir evenly to obtain mixture C; S32. Add the adhesive to the mixture C obtained in step S31, stir until homogeneous, and obtain mixture D; S33. Place the mixture D obtained in step S32 into a mold and heat press it to form a soundproof layer. After taking it out, trim and inspect it to obtain the soundproof layer.

[0017] The above-mentioned method for preparing sound-absorbing cotton is as follows: cut the adhesive strip to the required width and length, paste it onto the sound-absorbing layer, and package it to obtain sound-absorbing cotton.

[0018] The sound-absorbing cotton prepared by this invention does not require laser treatment or polishing, can effectively absorb the tire inner wall release agent, and its adhesion effect can achieve cohesive destruction of the self-adhesive layer, which is a revolutionary change. Tire dealers, tire shops, and even car owners can operate it themselves without equipment assistance. The construction is simple, the cost is low, and it can be widely used. It has the following advantages: (1) Effective absorption of silicone oil: It can effectively absorb the silicone oil-containing tire release agent, avoid the accumulation of silicone oil on the surface of the self-adhesive layer, and ensure the bonding performance of the self-adhesive layer.

[0019] (2) Wide temperature range: By rationally selecting the main polymer, tackifying resin, antioxidant and other components, the adhesive strip has a temperature range of -30℃ to 170℃, and can maintain good performance under different ambient temperatures.

[0020] (3) High tear strength: The cross-linking reaction initiated by the cross-linking agent forms a three-dimensional network structure in the adhesive strip, which greatly improves the tear strength of the adhesive strip and makes it less prone to tearing during use.

[0021] (4) High adhesive peel strength, which gives the adhesive strip high adhesive peel strength and enables it to be firmly bonded to the surface of the object being bonded. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0023] A tire-specific sound-absorbing cotton includes a sound-absorbing layer and an adhesive strip. The adhesive strip is composed of the following substances: 90 kg of styrene-butadiene-styrene block copolymer, 55 kg of hydrogenated petroleum resin, 25 kg of naphthenic oil, 5 kg of nano-montmorillonite, 5 kg of silica aerogel, 2 kg of antioxidant 1520, and 2 kg of 1,3,5-tris(4-boronic acid phenyl)benzene. The sound-absorbing layer is composed of the following substances in parts by weight: 50 kg of polyurethane foam, 25 kg of polyester fiber, 8 kg of aluminum hydroxide, 5 kg of mica powder, and 4 kg of epoxy resin binder.

[0024] The method for preparing the adhesive strip is as follows: S21. Styrene-butadiene-styrene block copolymer, hydrogenated petroleum resin, naphthenic oil, nano-montmorillonite, silica aerogel and antioxidant 1520 are added to a high-speed mixer in proportion and stirred and mixed evenly at room temperature to obtain mixture A; S22. Add 1,3,5-tris(4-boronic acid phenyl)benzene to mixture A obtained in step S21, and continue stirring to mix evenly to obtain mixture B; S23. Add mixture B to a twin-screw extruder and extrude to obtain adhesive strips.

[0025] The method for preparing the sound-silencing layer is as follows: S31. Pulverize polyurethane foam into fine particles, and add it together with polyester fiber, aluminum hydroxide and mica powder into a high-speed mixer and stir evenly to obtain mixture C; S32. Add the epoxy resin adhesive to the mixture C obtained in step S31, stir until homogeneous, and obtain mixture D; S33. Place the mixture D obtained in step S32 into a mold and heat press it to form a soundproof layer. After taking it out, trim and inspect it to obtain the soundproof layer.

[0026] The method for preparing the sound-absorbing cotton is as follows: cut the adhesive strip to the required width and length, paste it onto the sound-absorbing layer, and package it to obtain the sound-absorbing cotton. Example 2

[0027] A tire-specific sound-absorbing cotton includes a sound-absorbing layer and an adhesive strip. The adhesive strip is composed of the following substances: 90 kg of styrene-butadiene-styrene block copolymer, 27.5 kg of epoxidized soybean oil acrylate, 27.5 kg of terpene resin, 25 kg of naphthenic oil, 5 kg of nano-montmorillonite, 5 kg of silica aerogel, 2 kg of antioxidant 1520, and 2 kg of 1,3,5-tris(4-boronic acid phenyl)benzene. The sound-absorbing layer is composed of the following substances in parts by weight: 50 kg of polyurethane foam, 25 kg of polyester fiber, 8 kg of aluminum hydroxide, 5 kg of mica powder, and 4 kg of epoxy resin binder.

[0028] The method for preparing the adhesive strip is as follows: S21. Styrene-butadiene-styrene block copolymer, epoxidized soybean oil acrylate, terpene resin, naphthenic oil, nano-montmorillonite, silica aerogel and antioxidant 1520 are added to a high-speed mixer in proportion and stirred and mixed evenly at room temperature to obtain mixture A; S22. Add 1,3,5-tris(4-boronic acid phenyl)benzene to mixture A obtained in step S21, and continue stirring to mix evenly to obtain mixture B; S23. Add mixture B to a twin-screw extruder and extrude to obtain adhesive strips.

[0029] The method for preparing the sound-silencing layer is as follows: S31. Pulverize polyurethane foam into fine particles, and add it together with polyester fiber, aluminum hydroxide and mica powder into a high-speed mixer and stir evenly to obtain mixture C; S32. Add the epoxy resin adhesive to the mixture C obtained in step S31, stir until homogeneous, and obtain mixture D; S33. Place the mixture D obtained in step S32 into a mold and heat press it to form a soundproof layer. After taking it out, trim and inspect it to obtain the soundproof layer.

[0030] The method for preparing the sound-absorbing cotton is as follows: cut the adhesive strip to the required width and length, paste it onto the sound-absorbing layer, and package it to obtain the sound-absorbing cotton. Example 3

[0031] A tire-specific sound-absorbing cotton includes a sound-absorbing layer and an adhesive strip. The adhesive strip is composed of the following substances: 90 kg of styrene-butadiene-styrene block copolymer, 27.5 kg of epoxidized soybean oil acrylate, 27.5 kg of terpene resin, 25 kg of naphthenic oil, 5 kg of nano-montmorillonite, 5 kg of silica aerogel, 2 kg of antioxidant 1520, and 2 kg of 1,3,5-tris(4-boronic acid phenyl)benzene. The sound-absorbing layer is composed of the following substances in parts by weight: 50 kg of graphene-polyurethane composite foam, 25 kg of polyester fiber, 8 kg of aluminum hydroxide, 5 kg of mica powder, and 4 kg of epoxy resin binder.

[0032] The method for preparing the adhesive strip is as follows: S21. Styrene-butadiene-styrene block copolymer, epoxidized soybean oil acrylate, terpene resin, naphthenic oil, nano-montmorillonite, silica aerogel and antioxidant 1520 are added to a high-speed mixer in proportion and stirred and mixed evenly at room temperature to obtain mixture A; S22. Add 1,3,5-tris(4-boronic acid phenyl)benzene to mixture A obtained in step S21, and continue stirring to mix evenly to obtain mixture B; S23. Add mixture B to a twin-screw extruder and extrude to obtain adhesive strips.

[0033] The method for preparing the sound-silencing layer is as follows: S31. Graphene-polyurethane composite foam is crushed into fine particles, and then added to a high-speed mixer along with polyester fiber, aluminum hydroxide, and mica powder and stirred evenly to obtain mixture C; S32. Add the epoxy resin adhesive to the mixture C obtained in step S31, stir until homogeneous, and obtain mixture D; S33. Place the mixture D obtained in step S32 into a mold and heat press it to form a soundproof layer. After taking it out, trim and inspect it to obtain the soundproof layer.

[0034] The method for preparing the sound-absorbing cotton is as follows: cut the adhesive strip to the required width and length, paste it onto the sound-absorbing layer, and package it to obtain the sound-absorbing cotton. Example 4

[0035] A tire-specific sound-absorbing cotton includes a sound-absorbing layer and an adhesive strip. The adhesive strip is composed of the following substances: 90 kg of hyperbranched polyimide-modified styrene-butadiene-styrene block copolymer, 27.5 kg of epoxidized soybean oil acrylate, 27.5 kg of terpene resin, 25 kg of naphthenic oil, 5 kg of nano-montmorillonite, 5 kg of silica aerogel, 2 kg of antioxidant 1520, and 2 kg of 1,3,5-tris(4-boronic acid phenyl)benzene. The sound-absorbing layer is composed of the following substances in parts by weight: 50 kg of graphene-polyurethane composite foam, 25 kg of polyester fiber, 8 kg of aluminum hydroxide, 5 kg of mica powder, and 4 kg of epoxy resin binder.

[0036] The method for preparing the adhesive strip is as follows: S21. Hyperbranched polyimide-modified styrene-butadiene-styrene block copolymer, epoxidized soybean oil acrylate, terpene resin, naphthenic oil, nano-montmorillonite, silica aerogel and antioxidant 1520 are added to a high-speed mixer in proportion and stirred and mixed evenly at room temperature to obtain mixture A; S22. Add 1,3,5-tris(4-boronic acid phenyl)benzene to mixture A obtained in step S21, and continue stirring to mix evenly to obtain mixture B; S23. Add mixture B to a twin-screw extruder and extrude to obtain adhesive strips.

[0037] The method for preparing the sound-silencing layer is as follows: S31. Graphene-polyurethane composite foam is crushed into fine particles, and then added to a high-speed mixer along with polyester fiber, aluminum hydroxide, and mica powder and stirred evenly to obtain mixture C; S32. Add the epoxy resin adhesive to the mixture C obtained in step S31, stir until homogeneous, and obtain mixture D; S33. Place the mixture D obtained in step S32 into a mold and heat press it to form a soundproof layer. After taking it out, trim and inspect it to obtain the soundproof layer.

[0038] The method for preparing the sound-absorbing cotton is as follows: cut the adhesive strip to the required width and length, paste it onto the sound-absorbing layer, and package it to obtain the sound-absorbing cotton.

[0039] The styrene-butadiene-styrene block copolymer is a hyperbranched polyimide-modified styrene-butadiene-styrene block copolymer, and its preparation method includes the following steps: S11. Dissolve 100 kg of styrene-butadiene-styrene block copolymer in 500 kg of toluene, then add 30 kg of epichlorohydrin and 2 kg of triethylamine, react at 50~65℃ for 3 h, remove the solvent, and dry to obtain epoxidized styrene-butadiene-styrene block copolymer. S12. Dissolve 50 kg of pyromellitic dianhydride and 66.3 kg of tris(4-aminophenyl)amine in 250 kg of N-methylpyrrolidone. Under nitrogen protection, stir and react at 80 °C for 4 hours to generate hyperbranched polyamic acid. Heat to 180 °C to dehydrate and close the ring to generate hyperbranched polyimide. S13. Dissolve the epoxidized styrene-butadiene-styrene block copolymer obtained in step S11 in 520 kg of N-methylpyrrolidone, add the hyperbranched polyimide obtained in step S12, and then add 3 kg of triphenylphosphine. React at 110~130℃ for 10~15 h, cool down the reaction solution, add ethanol to precipitate the precipitate, filter, wash, and dry to obtain hyperbranched polyimide modified styrene-butadiene-styrene block copolymer.

[0040] Comparative Example 1 The adsorbent in Example 1 is removed, and everything else is the same as in Example 1, so it will not be repeated here.

[0041] The sound-absorbing cotton prepared in the examples and comparative examples was installed on tires for performance testing, and the results are shown in Table 1.

[0042]

[0043] The data comparison between Example 1 and Example 2 shows that the mixture of epoxidized soybean oil acrylate and terpene resin has better technical effect. The data comparison between Example 2 and Example 3 shows that graphene-polyurethane composite foam has better sound absorption effect. The data comparison between Example 3 and Example 4 shows that hyperbranched polyimide modified styrene-butadiene-styrene block copolymer has better technical effect. The data of Comparative Example 1 shows that the adsorbent can significantly increase the adsorption amount of silicone oil.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tyre-specific silent cotton, characterized in that, The back adhesive tape comprises styrene-butadiene-styrene block copolymer 80-100 parts by mass, tackifier 50-60 parts by mass, naphthenic oil 20-30 parts by mass, adsorbent 5-15 parts by mass, antioxidant 1520 1-2 parts by mass and crosslinking agent 1-2 parts by mass.

2. The tyre specific silent cotton of claim 1, wherein, The soundproof layer comprises polyurethane foam 40-60 parts by mass, sound-absorbing fiber 20-30 parts by mass, flame retardant 5-10 parts by mass, high-temperature-resistant additive 3-8 parts by mass and adhesive 2-5 parts by mass.

3. The tyre specific silent cotton of claim 1, wherein, The styrene-butadiene-styrene block copolymer is a hyperbranched polyimide modified styrene-butadiene-styrene block copolymer, and a preparation method thereof comprises the following steps: S11. Dissolve the styrene-butadiene-styrene block copolymer in toluene with a mass of 5 times that of the styrene-butadiene-styrene block copolymer, then add epichlorohydrin with a mass of 0.3 times that of the styrene-butadiene-styrene block copolymer and a catalyst triethylamine with a mass of 0.02 times that of the styrene-butadiene-styrene block copolymer, and react at 50-65℃ for 3h, remove the solvent and dry to obtain the epoxidized styrene-butadiene-styrene block copolymer; S12. Dissolve pyromellitic dianhydride and tri(4-aminophenyl)amine with a mass of 1.33 times that of the pyromellitic dianhydride in N-methylpyrrolidone with a mass of 5 times that of the pyromellitic dianhydride, stir and react at 80℃ for 4h under nitrogen protection to obtain hyperbranched polyamide acid, then dehydrate and close loop at 180℃ to obtain hyperbranched polyimide; S13. Dissolve the epoxidized styrene-butadiene-styrene block copolymer obtained in step S11 in N-methylpyrrolidone with a mass of 2-6 times that of the epoxidized styrene-butadiene-styrene block copolymer, add the hyperbranched polyimide obtained in step S12, and then add a catalyst triphenylphosphine with a mass of 0.01-0.1 times that of the hyperbranched polyimide, and react at 110-130℃ for 10-15h, then cool the reaction solution, add ethanol to precipitate the precipitate, filter, wash and dry to obtain the hyperbranched polyimide modified styrene-butadiene-styrene block copolymer.

4. The tyre specific silent cotton of claim 1, wherein, The tackifier is a mixture of hydrogenated petroleum resin or epoxy soybean oil acrylate and terpene resin.

5. The tyre specific silent cotton of claim 1, wherein, The adsorbent is a mixture of nano-montmorillonite and silica aerogel, and the mass ratio of the nano-montmorillonite to the silica aerogel is 1:

1.

6. The tyre specific silent cotton of claim 1, wherein, The crosslinking agent is 1,3,5-tris(4-boronic acid phenyl)benzene.

7. The tyre specific silent cotton of claim 2, wherein, The polyurethane foam is graphene-polyurethane composite foam.

8. The tyre specific silent cotton of claim 2, wherein, The sound-absorbing fiber is polyester fiber, the flame retardant is aluminum hydroxide, the high-temperature-resistant additive is mica powder, and the adhesive is epoxy resin adhesive.

9. The tyre-specific silent cotton of claims 1-8, characterized in that, The preparation method of the back adhesive tape is as follows: S21. Add the styrene-butadiene-styrene block copolymer, tackifier, naphthenic oil, adsorbent and antioxidant 1520 into a high-speed mixer according to the proportion, stir and mix uniformly at room temperature to obtain a mixture A; S22. Add the crosslinking agent into the mixture A obtained in step S21, continue to stir and mix uniformly to obtain a mixture B; S23. Add the mixture B into a double-screw extruder to perform extrusion molding to obtain the back adhesive tape.

10. The tyre-specific silent cotton of claims 1-8, characterized in that, The preparation method of the soundproof layer is as follows: S31. The polyurethane foam is crushed into fine particles, and the sound-absorbing fibers, flame retardant, and high-temperature-resistant additive are added into a high-speed mixer to be stirred uniformly to obtain a mixture C; S32. The binder is added into the mixture C obtained in step S31 to be stirred uniformly to obtain a mixture D; S33. The mixture D obtained in step S32 is placed into a mold to be hot-pressed, and after being taken out, trimming and inspection are performed to obtain a soundproof layer; The preparation method of the soundproof cotton is as follows: the adhesive tape is cut to the required width and length, is pasted on the soundproof layer, and is packaged to obtain the soundproof cotton.

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