A road surface maintenance seal layer resistant to high temperature and ultraviolet aging and its preparation method

Abstract

This invention provides a high-temperature and UV-resistant road surface maintenance seal and its preparation method, comprising, from bottom to top, an original road surface layer, a first elastomeric polymer material layer, an emulsified asphalt material layer, a sand layer, and a second elastomeric polymer material layer. Both the first and second elastomeric polymer material layers are made of elastomeric polymer materials. The elastomeric polymer includes a base material, a modifying material, and additives. The base material includes polyethylene naphthalate. The modifying materials include rubidium borate and benzothiorrole. The rubidium borate / benzothiorrole composite material used in the modified material of this invention, in addition to leveraging the UV-resistant and high-temperature resistant properties of rubidium borate and benzothiorrole, also acts as a sound-absorbing and noise-reducing agent for polyethylene naphthalate in the base material, producing a synergistic enhancement effect.

Description

Technical Field

[0001] This invention belongs to the field of road engineering technology and relates to pavement maintenance and sealing materials, specifically to a pavement maintenance and sealing material that is resistant to high temperature and ultraviolet aging and its preparation method. Background Technology

[0002] Highways are crucial to the development of the national economy and people's living standards. However, with increasingly frequent economic and cultural exchanges, highways are prone to damage, heavy loads, and are highly susceptible to cracks, potholes, ruts, and other defects, significantly impacting the operational safety of the entire highway network. Therefore, improving road maintenance measures is of paramount importance. Currently, commonly used asphalt pavement maintenance measures include slurry seal, chip seal, fog seal, and micro-surfacing. However, the construction quality of slurry seal and micro-surfacing is difficult to guarantee, aggregate wear is rapid, and road surface noise is high after construction, affecting driving comfort. Chip seal is generally suitable for the surface layer of low-grade highways or the undercoat of high-grade pavements, but not for urban roads and highways. Sand-containing fog seal can improve skid resistance, but its wear resistance is poor. Existing asphalt pavement maintenance seals are functionally limited and have insufficient performance, resulting in poor asphalt pavement maintenance effects and failing to meet the needs of increasing traffic volume and complex and variable climatic environments. If a noise-reducing road maintenance sealant material that is resistant to high temperature and ultraviolet aging can be developed for the road surface, and the construction method can be optimized, it can extend the service life of the road while reducing road damage. This is of great significance for promoting the construction of long-life and durable road surfaces. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a road maintenance seal coat that is resistant to high temperatures and ultraviolet aging, and its preparation method, thereby solving the technical problem that existing road maintenance seal coat materials are unable to simultaneously achieve noise reduction performance while meeting the requirements of high temperature and ultraviolet aging resistance.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A road surface maintenance seal layer includes, from bottom to top, an original road surface layer, a first layer of elastomeric material, an emulsified asphalt material layer, a sand layer, and a second layer of elastomeric material.

[0006] Both the first and second elastomeric polymer material layers are made of elastomeric polymer material.

[0007] The elastomeric polymer, by weight, is made from the following raw materials:

[0008] Basic materials, modified materials, and additives.

[0009] The base material includes polyethylene naphthalate.

[0010] The modified materials include rubidium borate and benzothiorrole.

[0011] The emulsified asphalt material layer is made of emulsified asphalt.

[0012] The sand layer is made of sand.

[0013] The present invention also has the following technical features:

[0014] Preferably, the amount of elastomeric polymer in the first elastomeric polymer material layer is 1-2 kg / m³. 2 The amount of emulsified asphalt in the emulsified asphalt material layer is 0.6–0.9 L / m. 2 The amount of sand used in the sand layer is 2-4 kg / m³. 2 The amount of elastomeric polymer in the second elastomeric polymer material layer is 1-2 kg / m³. 2 .

[0015] Specifically, the base material is made from the following raw materials: 2-chloro-4-(trifluoromethyl)phenyl isocyanate, polyethylene naphthalate, amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, and polytetramethylene ether glycol bis(p-aminobenzoate).

[0016] Specifically, the modified material is made from the following raw materials: poly(4,4"-diphenylsulfone) cellulose, butadiene-pyridine latex, talc, poly(ε-caprolactone), castor oil, rubidium borate, and benzothiophene.

[0017] Specifically, the additive is made from the following raw materials: polypropylene glycol and γ-epoxypropoxytrimethylsilane.

[0018] Preferably, the base material is made from the following raw materials: 40-70 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 35-50 parts of polyethylene naphthalate, 80-100 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, and 6-17 parts of polytetramethylene ether glycol bis(p-aminobenzoate).

[0019] Preferably, the modified material is made from the following raw materials: 6-12 parts of poly(4,4"-diphenylsulfonamide) cellulose, 3-6 parts of butadiene-pyridine latex, 2-4 parts of talc, 4-8 parts of poly(ε-caprolactone), 2-4 parts of castor oil, 3-6 parts of rubidium borate nitrate, and 5-10 parts of benzothiophene.

[0020] Preferably, the additive is made from the following raw materials: 2 to 4 parts of polypropylene glycol and 6 to 10 parts of γ-epoxypropoxytrimethylsilane.

[0021] More preferably, the elastomeric polymer is made from the following raw materials in parts by weight:

[0022] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, and 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate).

[0023] The composition consists of 8 parts poly(4,4"-diphenylsulfonamide) fiber, 5 parts butadiene-pyridine latex, 3 parts talc, 6 parts poly(ε-caprolactone), 3 parts castor oil, 4 parts rubidium borate nitrate, and 8 parts benzothiophene.

[0024] The amount of polypropylene glycol is 3 parts, and the amount of γ-epoxypropoxytrimethylsilane is 8 parts.

[0025] This invention also protects a method for preparing a road surface maintenance seal layer as described above, the method comprising the following steps:

[0026] Step one involves repairing, leveling, drying, and cleaning the road base layer, and preparing the necessary materials and equipment for construction.

[0027] Step 2, Preparation of modified talc: Add the talc powder and γ-epoxypropoxytrimethylsilane in the specified proportions to a round-bottom flask, stir thoroughly, ultrasonically disperse for 40 min, and heat in a water bath. Stir rapidly again, adding 8.0 g of deionized water dropwise during the stirring process. After heating, let stand for 24 h, remove the precipitate, wash with water, centrifuge four times, and freeze-dry to obtain the modified talc powder.

[0028] Step 3: Preparation of modified talc / poly(ε-caprolactone) composite material: Modified talc is poured into deionized water and stirred at room temperature for 30 minutes. Then, poly(ε-caprolactone) of the specified ratio is added, and stirring continues for 10 minutes. The mixture is then ultrasonically dispersed for 30 minutes. The ultrasonically dispersed solution is poured into a reactor and subjected to hydrothermal reaction at 90°C. The reactor is removed, the hydrothermally reacted mixture is poured out, centrifuged, and freeze-dried to obtain the modified talc / poly(ε-caprolactone) composite material.

[0029] Step 4, Surface treatment of poly(4,4"-diphenylsulfonamide) fiber: First, the surface of the poly(4,4"-diphenylsulfonamide) fiber is cleaned, then subjected to 42h reflux extraction treatment, placed in a drying oven and kept at 80℃ for 3h, then the pre-cleaned fiber is placed in a potassium sulfate mixed solution, heated to 70℃ and kept at 70℃ for 1h, washed with deionized water multiple times, and dried again, then immersed in a saturated dimethylacetamide solution under nitrogen reflux for 120min, washed with deionized water multiple times, and then extracted for 60min to obtain the surface-reduced poly(4,4"-diphenylsulfonamide) fiber.

[0030] Step 5, Preparation of polyurethane prepolymer: Polyethylene naphthalate, modified talc / poly(ε-caprolactone) composite material, castor oil, and modified poly(4,4"-diphenylsulfonamide) fiber are added to a reaction vessel according to the formula. The mixture is stirred under vacuum and heated to 100-120°C for dehydration. Then, the temperature is lowered to below 50°C and 2-chloro-4-(trifluoromethyl)phenyl isocyanate is added. After stirring evenly, the temperature is raised to 80-85°C and reacted for 3 hours. After the reaction is complete, the gas is removed under vacuum, and the mixture is cooled and sealed to obtain the polyurethane prepolymer, which is designated as component A.

[0031] Step 6: Preparation of rubidium borate nitrate / benzothiorrole composite material: Rubidium borate nitrate was poured into deionized water and stirred at room temperature for 30 min. Then, benzothiorrole in the prescribed ratio was added, and stirring was continued for 10 min. The mixture was then ultrasonically dispersed for 30 min. The ultrasonically dispersed solution was poured into a reaction vessel and subjected to hydrothermal reaction at 90℃. The reaction vessel was removed, the hydrothermally reacted mixture was poured out, centrifuged, and freeze-dried to obtain the rubidium borate nitrate / benzothiorrole composite material.

[0032] Step 7: Add the terminal amino polyethylene glycol-polycaprolactone diblock copolymer, polytetramethylene ether glycol bis(p-aminobenzoate), and rubidium borate / benzothiorrole composite material to the reactor according to the formula. Control the temperature inside the reactor to be less than 40°C, purge with nitrogen for protection, and add the corresponding proportion of polypropylene glycol. Stir evenly for a period of time, then add butyl-pyridine latex, stir evenly in a high-speed disperser, and dehydrate under vacuum in the reactor for 2-3 hours. When the moisture content is ≤0.05%, discharge the material, store it under nitrogen, and count it as component B.

[0033] Step 8, Preparation of polyurea elastomer: Using a high-pressure sprayer, components A and B are mixed in equal proportions by collision under high pressure and 65-75°C. Adjusting the spray flow rate can achieve a good atomization effect. The mixture is then sprayed onto the road surface substrate treated in Step 1. After spraying, curing is performed to form the first layer of elastomer polymer material.

[0034] Step nine: A synchronous chip seal vehicle is used to spray modified emulsified asphalt material onto the surface of the first layer of elastomeric polymer material. Sand is spread immediately after spraying to form an emulsified asphalt material layer and a sand layer.

[0035] Step 10: Use a high-pressure sprayer to mix components A and B in equal proportions under high pressure and collision at 65-75℃. Adjust the spray flow rate to achieve good atomization. Apply a second spray to the road base substrate obtained after step 9 to form a second layer of elastomeric polymer material. After spraying, close the road to traffic for more than 4 hours and perform curing to form a noise-reducing road surface maintenance seal that is resistant to high temperature and UV aging.

[0036] Compared with the prior art, the present invention has the following technical effects:

[0037] (I) The boron rubidium nitrate / benzothiorrole composite material used in the modified material of the present invention, in addition to giving full play to the UV aging resistance and high temperature resistance of boron rubidium nitrate and benzothiorrole, can also serve as a sound absorption and noise reduction additive for polyethylene naphthalate, a sound absorption and noise reduction material in the base material, producing a synergistic enhancement effect. This improves the phenomenon that the sound absorption coefficient of the elastomer polymer decreases due to the addition of the above-mentioned other modified materials, greatly improves the damping performance of the elastomer polymer, effectively blocks and attenuates the propagation of sound, and reduces road noise pollution.

[0038] (II) The elastomeric polymer of this invention is a high-performance polyurea material formed by the reaction of component A and component B. It possesses excellent properties such as high strength, high adhesion, wear resistance, high temperature resistance, and impact resistance. It can reduce the impact of ultraviolet radiation on the road surface, delay high-temperature aging, strengthen the adhesion and flexibility of asphalt pavement, maintain its wear resistance for a long time, thereby resisting traffic loads and improving the overall strength of the road surface. Simultaneously, it enhances the damping and vibration reduction function of the road surface, achieving the goal of reducing traffic noise. The reaction process is controllable, the preparation process is simple, and construction is not affected by ambient temperature.

[0039] (III) This invention uses poly(4,4"-diphenylsulfonamide) fiber, butadiene-pyridine latex, talc, poly(ε-caprolactone), castor oil, rubidium borate, and benzothiorrole to improve the elastomer polymer. Poly(4,4"-diphenylsulfonamide) fiber has good high temperature resistance and dimensional stability; butadiene-pyridine latex, due to the introduction of pyridine groups into the latex, can greatly enhance the adhesion of the material; talc has a lamellar structure, which can significantly improve the impact strength, shear strength, and thermal stability of the composite material; poly(ε-caprolactone) has extremely high flexibility, bonding strength, and thermal stability; the hydrophobic segments in castor oil can reduce the influence of water molecules on easily hydrolyzed groups and the original hydrogen bonding system, improving water resistance and wear resistance; rubidium borate and benzothiorrole have excellent UV aging resistance and high temperature resistance.

[0040] (IV) The sealing material used in this invention can be used on the surface of road surfaces, bridge surfaces and tunnel surfaces. The first layer of elastomeric material, the emulsified asphalt material, the sand layer and the second layer of elastomeric material from bottom to top can reduce the damage to the road surface caused by traffic load, enhance the road surface adhesion, flexibility, high temperature resistance, UV aging resistance and noise reduction performance, seal micro-cracks in old road surfaces and strengthen the road surface skid resistance. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the cross-sectional structure of the road surface maintenance seal layer.

[0042] Figure 2This is a schematic diagram of the preparation method of the road surface maintenance seal layer of the present invention.

[0043] The meanings of the labels in the diagram are as follows: 1-existing pavement layer, 2-first layer of elastomeric material, 3-emulsified asphalt material layer, 4-sand layer, 5-second layer of elastomeric material.

[0044] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, all raw materials and equipment used in this invention are those known in the prior art.

[0046] like Figure 1 As shown, the road surface maintenance sealant of the present invention can be used on the surfaces of roads, bridge decks, and tunnel surfaces. The high-temperature and UV-resistant noise-reducing road surface maintenance sealant comprises, from bottom to top, a first elastomeric polymer layer, an emulsified asphalt material layer, a sand layer, and a second elastomeric polymer layer. The elastomeric polymer material layer enhances adhesion, flexibility, noise reduction performance, and UV aging resistance; the emulsified asphalt material layer seals surface voids and prevents surface water infiltration; and the sand layer prevents a decrease in road surface skid resistance after emulsified asphalt spraying.

[0047] In this invention:

[0048] Polyethylene naphthalate has a number average molecular weight of 30,000 to 40,000.

[0049] Amino-terminated polyethylene glycol-polycaprolactone diblock copolymer with a number average molecular weight of 3,000 to 45,000.

[0050] Polytetramethylene ether diol bis(p-aminobenzoate) has a number average molecular weight of 950-1000.

[0051] Poly(4,4"-diphenylsulfoneamine) fiber has a diameter of 10-20 nm, a length of 1-2 μm, and a number-average molecular weight of 10,000-20,000.

[0052] Butadiene-pyridine latex has a number average molecular weight of 10,000 to 25,000.

[0053] Poly(ε-caprolactone) has a number-average molecular weight of 1000–4000.

[0054] Polypropylene glycol, with a number average molecular weight of 400–2000.

[0055] Talc powder has a flaky interlayer structure and an average particle size of 6–10 μm.

[0056] Emulsified asphalt can be water-based epoxy emulsified asphalt, SBS / rubber powder composite modified emulsified asphalt, or SBR / CR composite modified emulsified asphalt.

[0057] The sand material is one of the following: basalt, diabase, limestone, or silicon carbide. The sand particle size ranges from 1.18 mm to 2.36 mm, and the angularity is 50% to 70%.

[0058] In the following embodiments, the road subbase refers to an asphalt concrete substrate.

[0059] In this invention, the elastomeric polymer material layer is used to enhance adhesion, flexibility, noise reduction performance, and UV aging resistance; the emulsified asphalt material layer is used to seal road surface voids and prevent surface water infiltration; and the sand layer is used to prevent the road surface skid resistance from decreasing after emulsified asphalt is sprayed.

[0060] The road surface maintenance sealing material of the present invention is used for the construction application of top sealing layer.

[0061] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0062] Example 1:

[0063] This embodiment provides a road surface maintenance seal layer, such as Figure 1 As shown, it includes, from bottom to top, the original road surface layer 1, the first layer of elastomeric material 2, the emulsified asphalt material layer 3, the sand layer 4, and the second layer of elastomeric material 5.

[0064] The first layer of elastomeric polymer material 2 and the second layer of elastomeric polymer material 5 are both made of elastomeric polymer material.

[0065] The emulsified asphalt material layer 3 is made of emulsified asphalt.

[0066] The sand layer 4 is made of sand.

[0067] The amount of elastomeric polymer used in the first layer 2 is 1.5 kg / m³. 2 .

[0068] The amount of emulsified asphalt used in layer 3 of the emulsified asphalt material is 0.8 L / m. 2 .

[0069] The sand content in the sand layer is 3 kg / m³. 2 .

[0070] Elastomer polymers, by weight, are made from the following raw materials:

[0071] 45 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 35 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 6 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 6 parts of poly(4,4"-diphenyl sulfone)amine fiber, 3 parts of butadiene-pyridine latex, 2 parts of talc, 4 parts of poly(ε-caprolactone), 2 parts of castor oil, 3 parts of rubidium borate nitrate, 6 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0072] The emulsified asphalt material layer is water-based epoxy emulsified asphalt.

[0073] The sand material is basalt.

[0074] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, such as... Figure 2 As shown, the method includes the following steps:

[0075] Step one involves repairing, leveling, drying, and cleaning the road base layer, and preparing the necessary materials and equipment for construction.

[0076] Step 2, Preparation of modified talc: Add the talc powder and γ-epoxypropoxytrimethylsilane in the specified proportions to a round-bottom flask, stir thoroughly, ultrasonically disperse for 40 minutes, and heat in a water bath. Stir rapidly again, slowly adding 8.0 g of deionized water during the stirring process. After heating, let stand for 24 hours, remove the precipitate, wash with water, centrifuge four times, and freeze-dry to obtain the modified talc powder.

[0077] Step 3: Preparation of modified talc / poly(ε-caprolactone) composite material: Modified talc is poured into deionized water and stirred at room temperature for 30 minutes. Then, poly(ε-caprolactone) of the specified ratio is added, and stirring continues for 10 minutes. The mixture is then ultrasonically dispersed for 30 minutes. The ultrasonically dispersed solution is poured into a reactor and subjected to hydrothermal reaction at 90°C. The reactor is removed, the hydrothermally reacted mixture is poured out, centrifuged, and freeze-dried to obtain the modified talc / poly(ε-caprolactone) composite material.

[0078] Step 4, Surface treatment of poly(4,4"-diphenylsulfonamide) fiber: First, the surface of the poly(4,4"-diphenylsulfonamide) fiber is cleaned, then subjected to 42h reflux extraction treatment, placed in a drying oven and kept at 80℃ for 3h, then the pre-cleaned fiber is placed in a potassium sulfate mixed solution, heated to 70℃ and kept at 70℃ for 1h, washed with deionized water multiple times, and dried again, then immersed in a saturated dimethylacetamide solution under nitrogen reflux for 120min, washed with deionized water multiple times, and then extracted for 60min to obtain the surface-reduced poly(4,4"-diphenylsulfonamide) fiber.

[0079] Step 5, Preparation of polyurethane prepolymer: Polyethylene naphthalate, modified talc / poly(ε-caprolactone) composite material, castor oil, and modified poly(4,4"-diphenylsulfonamide) fiber are added to a reaction vessel according to the formula. The mixture is stirred under vacuum and heated to 100-120°C for dehydration. Then, the temperature is lowered to below 50°C and 2-chloro-4-(trifluoromethyl)phenyl isocyanate is added. After stirring evenly, the temperature is raised to 80-85°C and reacted for 3 hours. After the reaction is complete, the gas is removed under vacuum, and the mixture is cooled and sealed to obtain the polyurethane prepolymer, which is designated as component A.

[0080] Step 6: Preparation of rubidium borate nitrate / benzothiorrole composite material: Rubidium borate nitrate was poured into deionized water and stirred at room temperature for 30 min. Then, benzothiorrole in the prescribed ratio was added, and stirring was continued for 10 min. The mixture was then ultrasonically dispersed for 30 min. The ultrasonically dispersed solution was poured into a reaction vessel and subjected to hydrothermal reaction at 90℃. The reaction vessel was removed, the hydrothermally reacted mixture was poured out, centrifuged, and freeze-dried to obtain the rubidium borate nitrate / benzothiorrole composite material.

[0081] Step 7: Add the terminal amino polyethylene glycol-polycaprolactone diblock copolymer, polytetramethylene ether glycol bis(p-aminobenzoate), and rubidium borate / benzothiorrole composite material to the reactor according to the formula. Control the temperature inside the reactor to be less than 40°C, purge with nitrogen for protection, and add the corresponding proportion of polypropylene glycol. Stir evenly for a period of time, then add butyl-pyridine latex, stir evenly in a high-speed disperser, and dehydrate under vacuum in the reactor for 2-3 hours. When the moisture content is ≤0.05%, discharge the material, store it under nitrogen, and count it as component B.

[0082] Step 8, Preparation of polyurea elastomer: Using a high-pressure sprayer, components A and B are mixed in equal proportions by collision under high pressure and 65-75°C. Adjusting the spray flow rate can achieve a good atomization effect. The mixture is sprayed onto the road surface substrate treated in Step 1. After spraying, curing is performed to form the first layer of elastomer polymer material 2.

[0083] Step 9: Using a synchronous chip seal vehicle, modified emulsified asphalt material is sprayed onto the surface of the first layer of elastomeric polymer material 2. Sand is spread immediately after spraying to form the emulsified asphalt material layer 3 and the sand layer 4.

[0084] Step 10: Use a high-pressure sprayer to mix components A and B in equal proportions under high pressure and collision at 65-75℃. Adjust the spray flow rate to achieve good atomization. Apply a second spray to the road base substrate obtained after step 9 to form the second layer of elastomeric polymer material 5. After spraying, close the road to traffic for more than 4 hours and carry out curing to form a noise-reducing road surface maintenance seal that is resistant to high temperature and UV aging.

[0085] Performance testing:

[0086] To verify that the road maintenance seal material of this embodiment has wear resistance, impact resistance, bonding performance, UV aging resistance and noise reduction performance, asphalt concrete specimens with a prefabricated size of 30*30*5cm were prepared in accordance with the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011). The specimens were made according to the above-mentioned construction steps applied to the asphalt concrete matrix. After completion, the wear loss, impact strength, interlayer bond strength and sound absorption coefficient of the specimens were tested.

[0087] The performance test results of this embodiment are shown in Table 1.

[0088] Example 2:

[0089] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0090] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0091] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone)amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 4 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0092] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0093] The performance test results of this embodiment are shown in Table 1.

[0094] Example 3:

[0095] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0096] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0097] The composition includes 65 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 45 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 14 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 12 parts of poly(4,4"-diphenyl sulfone amine fiber, 5 parts of butadiene-pyridine latex, 4 parts of talc, 8 parts of poly(ε-caprolactone), 4 parts of castor oil, 6 parts of rubidium borate nitrate, 10 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0098] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0099] The performance test results of this embodiment are shown in Table 1.

[0100] Example 4:

[0101] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0102] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0103] The composition includes 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 10 parts of poly(4,4"-diphenyl sulfone amine fiber, 6 parts of butadiene-pyridine latex, 4 parts of talc, 6 parts of poly(ε-caprolactone), 2 parts of castor oil, 5 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0104] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0105] The performance test results of this embodiment are shown in Table 1.

[0106] Example 5:

[0107] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0108] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0109] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 6 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone)amine fiber, 3 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 4 parts of castor oil, 4 parts of rubidium borate nitrate, 10 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0110] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0111] The performance test results of this embodiment are shown in Table 1.

[0112] Example 6:

[0113] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0114] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0115] The composition includes 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 15 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 10 parts of poly(4,4"-diphenyl sulfone amine fiber, 4 parts of butadiene-pyridine latex, 4 parts of talc, 8 parts of poly(ε-caprolactone), 2 parts of castor oil, 5 parts of rubidium borate nitrate, 6 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0116] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0117] The performance test results of this embodiment are shown in Table 1.

[0118] Example 7:

[0119] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0120] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0121] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 10 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 12 parts of poly(4,4"-diphenyl sulfone amine fiber, 6 parts of butadiene-pyridine latex, 3 parts of talc, 5 parts of poly(ε-caprolactone), 3 parts of castor oil, 3 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0122] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0123] The performance test results of this embodiment are shown in Table 1.

[0124] Example 8:

[0125] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0126] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0127] The composition includes 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 12 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 10 parts of poly(4,4"-diphenyl sulfone)amine fiber, 5 parts of butadiene-pyridine latex, 2 parts of talc, 8 parts of poly(ε-caprolactone), 3 parts of castor oil, 6 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0128] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0129] The performance test results of this embodiment are shown in Table 1.

[0130] Example 9:

[0131] This embodiment provides a road surface maintenance seal layer, which differs from Embodiment 1 only in that the elastomer polymer formulation is different.

[0132] In this embodiment, the elastomeric polymer, by weight, is made from the following raw materials:

[0133] The composition includes 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 10 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 9 parts of poly(4,4"-diphenyl sulfone amine fiber, 4 parts of butadiene-pyridine latex, 2 parts of talc, 5 parts of poly(ε-caprolactone), 4 parts of castor oil, 3 parts of rubidium borate nitrate, 10 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0134] This embodiment also provides a method for preparing the above-mentioned road maintenance seal layer, which is basically the same as the method for preparing the road maintenance seal layer given in Example 1.

[0135] The performance test results of this embodiment are shown in Table 1.

[0136] Comparative Example 1:

[0137] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0138] The formulation of this comparative example contains only 2-chloro-4-(trifluoromethyl)phenyl isocyanate, polyethylene naphthalate, amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, polytetramethylene ether glycol bis(p-aminobenzoate), and polypropylene glycol; no other substances are added. The details are as follows:

[0139] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0140] The composition includes 65 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 48 parts of polyethylene naphthalate, 107 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 10 parts of polytetramethylene ether glycol bis(p-aminobenzoate), and 4 parts of polypropylene glycol.

[0141] The preparation method of this comparative example is basically the same as that of Example 2, except that:

[0142] 1) Do not perform steps two, three, four, and six.

[0143] 2) In step five, only isocyanate-terminated polyurethane prepolymers are prepared without any modification treatment.

[0144] 3) In step seven, only the terminal amino polyethylene glycol-polycaprolactone diblock copolymer, polytetramethylene ether glycol bis(p-aminobenzoate), and polypropylene glycol are stirred evenly in a high-speed disperser, and vacuum dehydrated in the reactor for 2-3 hours. When the moisture content is ≤0.05%, the material is discharged and counted as component B.

[0145] The performance test results of this comparative example are shown in Table 1.

[0146] Comparative Example 2:

[0147] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0148] In this comparative formulation, rubidium borate and benzothiorrole were not added, as detailed below:

[0149] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0150] The composition includes 57 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 42 parts of polyethylene naphthalate, 98 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone)amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0151] The preparation method of this comparative example is basically the same as that of Example 2, except that:

[0152] 1) Do not proceed to step six.

[0153] 2) No rubidium borate / benzothiorrole composite material was added in step seven.

[0154] The performance test results of this comparative example are shown in Table 1.

[0155] Comparative Example 3:

[0156] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0157] In this comparative example, rubidium borate was not added to the formula, as detailed below:

[0158] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0159] The composition includes 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone)amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 12 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0160] The preparation method of this comparative example is basically the same as that of Example 2, except that:

[0161] 1) Do not proceed to step six.

[0162] 2) Benzothiorrole is used in step seven instead of rubidium borate / benzothiorrole composite material.

[0163] The performance test results of this comparative example are shown in Table 1.

[0164] Comparative Example 4:

[0165] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0166] In this comparative formulation, benzothiophene was not added, as detailed below:

[0167] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0168] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone)amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 12 parts of rubidium borate nitrate, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0169] The preparation method of this comparative example is basically the same as that of Example 2, except that:

[0170] 1) Do not proceed to step six.

[0171] 2) Rubidium borate is used in step nine instead of the rubidium borate / benzothiorrole composite material.

[0172] The performance test results of this comparative example are shown in Table 1.

[0173] Comparative Example 5:

[0174] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0175] In this comparative formulation, polyethylene naphthalate was not added, as detailed below:

[0176] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0177] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 130 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone)amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 4 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0178] The preparation method of this comparative example is basically the same as that of Example 2, except that:

[0179] Polyethylene naphthalate was not added in step five.

[0180] The performance test results of this comparative example are shown in Table 1.

[0181] Comparative Example 6:

[0182] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0183] In this comparative formulation, no amino-terminated polyethylene glycol-polycaprolactone diblock copolymer was added, as detailed below:

[0184] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0185] The composition includes 145 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone)amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 4 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0186] The preparation method of this comparative example is basically the same as that of Example 2, except that:

[0187] No butylated amino-terminated polyethylene glycol-polycaprolactone diblock copolymer is added in step seven.

[0188] The performance test results of this comparative example are shown in Table 1.

[0189] Comparative Example 7:

[0190] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0191] The formulation in this comparative example does not contain polytetramethylene ether glycol bis(p-aminobenzoate), as detailed below:

[0192] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0193] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 98 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of poly(4,4"-diphenyl sulfone amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 4 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0194] The preparation method of this comparative example is basically the same as that of Example 1, except that:

[0195] No polytetramethylene ether diol bis(p-aminobenzoate) is added in step seven.

[0196] The performance test results of this comparative example are shown in Table 1.

[0197] Comparative Example 8:

[0198] This comparative example provides a road maintenance sealant material. The difference between this comparative example and Example 2 is that the elastomer polymer formulation is different.

[0199] The formulation of this comparative example does not contain poly(4,4"-diphenylsulfone) phthalamide fiber, as detailed below:

[0200] In this comparative example, the elastomeric polymer, by weight, is made from the following raw materials:

[0201] 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 98 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 4 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

[0202] The preparation method of this comparative example is basically the same as that of Example 2, except that:

[0203] 1) Do not perform step four.

[0204] 2) No poly(4,4"-diphenylsulfone) fiber was added in step five.

[0205] The performance test results of this comparative example are shown in Table 1.

[0206] Table 1 Performance Tests of Noise-Reducing Road Maintenance Sealing Coating Materials with High Temperature and UV Aging Resistance

[0207]

[0208] As can be seen from Table 1:

[0209] (A) Analysis of the various indicators of Examples 1-9 and Comparative Examples 1-8 reveals that in addition to the inherent UV aging resistance and high temperature resistance of the materials, rubidium borate and benzothiophene also have a synergistic effect. Their composite material can significantly improve the noise reduction performance of the elastomer polymer as a sound-absorbing agent, effectively blocking and attenuating the propagation of sound, thereby reducing road noise pollution.

[0210] (B) Analysis of the various indicators of Examples 2 and Comparative Examples 5-8 reveals that the synergistic enhancement effect of the rubidium borate nitrate and benzothiorrole composite additive only appears in the elastomer polymer after the addition of polyethylene naphthalate, which can significantly improve its sound absorption coefficient. However, the improvement effect is not obvious in the materials after other polymers are used to replace polyethylene naphthalate. This indicates that the rubidium borate nitrate / benzothiorrole composite material is a specific sound absorption and noise reduction additive for polyethylene naphthalate.

[0211] (C) Comparing the various indicators of Examples 1-9 and Comparative Examples 1-9, it can be found that Example 2 has the best overall performance. The raw material composition of the best elastomer polymer is as follows: 55 parts of 2-chloro-4-(trifluoromethyl)phenyl isocyanate, 40 parts of polyethylene naphthalate, 90 parts of amino-terminated polyethylene glycol-polycaprolactone diblock copolymer, 8 parts of polytetramethylene ether glycol bis(p-aminobenzoate), 8 parts of poly(4,4"-diphenyl sulfone amine fiber, 5 parts of butadiene-pyridine latex, 3 parts of talc, 6 parts of poly(ε-caprolactone), 3 parts of castor oil, 4 parts of rubidium borate nitrate, 8 parts of benzothiophene, 3 parts of polypropylene glycol, and 8 parts of γ-epoxypropoxytrimethylsilane.

Claims

1. A pavement maintenance seal coat characterized by, The original pavement layer (1), the first layer of elastomer polymer material layer (2), the emulsified asphalt material layer (3), the sand layer (4) and the second layer of elastomer polymer material layer (5) are sequentially arranged from bottom to top. The first layer of elastomer polymer material layer (2) and the second layer of elastomer polymer material layer (5) are both made of elastomer polymer material. The elastomer polymer is made of the following raw materials: The base material, the modified material and the additive; The base material includes polyethylene naphthalate. The modified material includes rubidium boron nitrate and benzothiophene. The emulsified asphalt material layer (3) is made of emulsified asphalt. The sand layer (4) is made of sand.

2. The pavement maintenance overlay of claim 1, wherein, The amount of the elastomer polymer in the first layer of elastomer polymer material (2) is 1-2 kg / m 2 ; The amount of emulsified asphalt in the emulsified asphalt material layer (3) is 0.6-0.9 L / m 2 ; The sand layer (4) has a sand amount of 2-4 kg / m 2 ; The amount of the elastomeric polymer in the second layer of elastomeric polymer material (5) is 1-2 kg / m2 2 .

3. The pavement maintenance overlay of claim 1, wherein, The base material is made of the following raw materials: 2-chloro-4-(trifluoromethyl) phenyl isocyanate, polyethylene naphthalate, amino-terminated polyethylene glycol-poly-caprolactone diblock copolymer, and polytetramethylene ether glycol bis-p-aminobenzoic acid ester. The modified material is made of the following raw materials: polyterephthaloyl-4,4"-diphenyl sulfone amine fiber, butyl latex, talc, poly-epsilon-caprolactone, castor oil, rubidium boron nitrate, and benzothiophene. The additive is made of the following raw materials: polypropylene glycol and gamma-glycidoxytrimethylsilane.

4. The pavement maintenance overlay of claim 3, wherein, The base material is made of the following raw materials: 2-chloro-4-(trifluoromethyl) phenyl isocyanate 40-70 parts, polyethylene naphthalate 35-50 parts, amino-terminated polyethylene glycol-poly-caprolactone diblock copolymer 80-100 parts, and polytetramethylene ether glycol bis-p-aminobenzoic acid ester 6-17 parts.

5. The pavement maintenance overlay of claim 3, wherein, The modified material is made of the following raw materials: polyterephthaloyl-4,4"-diphenyl sulfone amine fiber 6-12 parts, butyl latex 3-6 parts, talc 2-4 parts, poly-epsilon-caprolactone 4-8 parts, castor oil 2-4 parts, rubidium boron nitrate 3-6 parts, and benzothiophene 5-10 parts.

6. The pavement maintenance overlay of claim 3, wherein, The additive is made of the following raw materials: polypropylene glycol 2-4 parts and gamma-glycidoxytrimethylsilane 6-10 parts.

7. The pavement maintenance overlay of claim 3, wherein, The elastomer polymer is made of the following raw materials in weight fractions: 2-chloro-4-(trifluoromethyl) phenyl isocyanate 55 parts, polyethylene naphthalate 40 parts, amino-terminated polyethylene glycol-poly-caprolactone diblock copolymer 90 parts, and polytetramethylene ether glycol bis-p-aminobenzoic acid ester 8 parts; polyterephthaloyl-4,4"-diphenyl sulfone amine fiber 8 parts, butyl latex 5 parts, talc 3 parts, poly-epsilon-caprolactone 6 parts, castor oil 3 parts, rubidium boron nitrate 4 parts, and benzothiophene 8 parts; polypropylene glycol 3 parts and gamma-glycidoxytrimethylsilane 8 parts.

8. A method of producing a road maintenance seal as claimed in any one of claims 1 to 7, characterised in that, The method comprises the following steps: Step one, repair, leveling, drying and cleaning treatment of highway base, ready for construction of raw materials and instruments and equipment; Step two, preparation of modified talc: in a round bottom flask, talc and gamma-epoxy propoxy trimethyl silane were added in the proportion of the formula, then stirred well, ultrasonic dispersed for 40 min and heated in water bath, stirred again quickly, and 8.0 g of deionized water was added dropwise during the stirring process; after heating, it was placed for 24 h, the lower layer precipitate was taken out, washed with water and centrifuged for 4 times, and then modified talc was obtained after freeze drying; Step three, preparation of modified talc / poly-ε-caprolactone composite material: the modified talc was poured into deionized water, stirred at room temperature for 30 min, then poly-ε-caprolactone was added in the proportion of the formula, and stirred for 10 min, then ultrasonic dispersed for 30 min; the dispersion liquid after ultrasonic was poured into a reaction kettle, and hydrothermal reaction was carried out at 90℃, the mixed liquid after hydrothermal reaction was poured out from the reaction kettle, centrifuged and freeze-dried to obtain the modified talc / poly-ε-caprolactone composite material; Step four, surface treatment of poly-p-phenyleneterephthalamide-4,4"-diphenyl sulfone amine fiber: the poly-p-phenyleneterephthalamide-4,4"-diphenyl sulfone amine fiber was first surface cleaned, then reflux extracted for 42 h, placed in a drying box for 80℃ heat preservation and 3 h drying, then placed in the pre-cleaned fiber in the potassium sulfate mixed solution, heated to 70℃, and heat preserved for 1 h, washed with deionized water for multiple times, and then dried again, immersed in a saturated dimethylacetamide solution for 120 min nitrogen reflux treatment, washed with deionized water for multiple times, and then extracted for 60 min to obtain the surface reduced poly-p-phenyleneterephthalamide-4,4"-diphenyl sulfone amine fiber; Step five, preparation of polyurethane prepolymer: polyethylene naphthalate, modified talc / poly-ε-caprolactone composite material, castor oil and modified poly-p-phenyleneterephthalamide-4,4"-diphenyl sulfone amine fiber were added into a reaction kettle in the proportion, stirred under vacuum, heated to 100-120℃ for dehydration, then 2-chloro-4-(trifluoromethyl) phenyl isocyanate was added when the temperature was below 50℃, stirred uniformly, heated to 80-85℃ for 3 h, vacuum degassed after the reaction was completed, and then discharged after cooling to obtain the polyurethane prepolymer as component A; Step six, preparation of rubidium boron nitrate / benzothiophene composite material: rubidium boron nitrate was poured into deionized water, stirred at room temperature for 30 min, then benzothiophene was added in the proportion of the formula, and stirred for 10 min, then ultrasonic dispersed for 30 min; the dispersion liquid after ultrasonic was poured into a reaction kettle, and hydrothermal reaction was carried out at 90℃, the mixed liquid after hydrothermal reaction was poured out from the reaction kettle, centrifuged and freeze-dried to obtain the rubidium boron nitrate / benzothiophene composite material; Step seven, amino-terminated polyethylene glycol-poly-caprolactone diblock copolymer, polytetramethylene ether glycol bis-p-aminobenzoic acid ester and rubidium boron nitrate / benzothiophene composite material were added into a reaction kettle in the proportion, the temperature in the kettle was controlled below 40℃, nitrogen was introduced for protection, and corresponding proportion of polypropylene glycol was added, stirred uniformly for a period of time, then butyl pyrrole latex was added, stirred uniformly in a high-speed dispersion machine, and dehydrated in the reaction kettle for 2-3 h, when the water content was ≤0.05%, the material was discharged, and nitrogen was introduced for preservation, which was component B. Step eight, preparation of polyurea elastomer: using high pressure spray machine to realize the collision type equal proportion mixing of A component and B component under high pressure condition at 65-75℃, adjusting the spraying flow can obtain good atomization effect, spraying on the road surface substrate treated in step one, curing after spraying to form the first layer of elastomer polymer material layer (2); Step nine, using synchronous stone seal coat vehicle to spray modified emulsified asphalt material on the surface of the first layer of elastomer polymer material layer (2), immediately spreading sand after spraying to form emulsified asphalt material layer (3) and sand layer (4); Step ten, using high pressure spray machine to realize the collision type equal proportion mixing of A component and B component under high pressure condition at 65-75℃, adjusting the spraying flow can obtain good atomization effect, secondary spraying on the road bottom substrate treated in step nine to form the second layer of elastomer polymer material layer (5), closing traffic for more than 4h after spraying and curing to form the high temperature resistant and ultraviolet aging resistant noise reduction type road maintenance seal coat.

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