High polymer material for rapidly filling expansion joint in large traffic state, preparation method and application

Abstract

The invention discloses a high polymer material for quickly filling expansion joints in a large traffic state, a preparation method and application. Relates to a filling material for quickly repairing expansion joint devices. The material can meet the requirements of cast-in-place at normal temperature and normal pressure, rapid gelling and curing, has low modulus, high elongation, weather aging resistance and high and low temperature resistance, and also has a self-repairing function after piercing. Comprising a component A and a component B, the component A comprises the following components in parts by mass: a polyurethane prepolymer, an inhibitor, carbon black and a comprehensive anti-aging agent, and the component B comprises the following components in parts by mass: polyether polyol, a chain extender, an accelerant, a defoaming agent, a catalyst and an ultraviolet light absorber. According to the invention, p-benzoquinone dioxime is adopted as an accelerant, so that the gelation and curing time is greatly shortened, and the requirement of quickly recovering road traffic is met; and excellent affinity can be formed with a metal component of the expansion joint device, and an anti-aging effect is achieved. The coating has the functions of low modulus, strong metal adhesion, after-day aging resistance, water resistance, puncture self-repairing and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of polyurethane elastomer preparation, and particularly relates to a polymer filling material for quickly repairing expansion joints of roads and bridges, a preparation method and applications. Background Art

[0002] With the nation's economic progress, the highway network has been continuously improved and has been in operation for many years. Currently, expansion joints on heavily trafficked highway bridges are subject to numerous defects, posing a threat to life and property. Repair and replacement are costly and expensive, so rapid repair based on the damage mechanism is a pressing need.

[0003] When the road is in operation, the expansion joint is constantly accumulated with stones and debris, which seriously affects the expansion and contraction function of the expansion joint; as the stones and debris continue to accumulate in the expansion joint, the expansion joint waterstop is pierced by the stones and debris; the expansion joint waterstop itself also has problems such as aging and cracking. When the expansion joint waterstop is damaged, the expansion joint leaks. When the bearings between the pier and the bridge come into contact with water, they will rust. When the rust phenomenon becomes more serious, the bearings will lose their seismic isolation function, seriously affecting the use and life of the bridge.

[0004] In response to this situation, the common practice of bridge maintenance units is: 1. Organize professionals to conduct regular bridge inspections. Once it is found that the expansion joint is affected by debris accumulation, professional personnel will be organized to clean it to ensure the expansion and contraction function of the expansion joint. The cleaning process requires partial road closure, which increases traffic pressure and operation and maintenance costs. At the same time, it poses serious safety hazards to both road maintenance personnel and road drivers and passengers.

[0005] 2. Organize professionals to conduct regular bridge inspections. If the expansion joint waterstop is found to be damaged, professionals need to replace the waterstop to ensure the expansion and contraction function of the expansion joint. The replacement process requires partial road closure, which increases traffic pressure and operation and maintenance costs. At the same time, it poses serious safety hazards to both road maintenance personnel and road drivers and passengers.

[0006] The prior art document "CN107686550A, A Plasticizer-Free, Low-Hardness, High-Elongation-at-Break Polyurethane Elastomer Material Composition and Preparation Method thereof" proposes a plasticizer-free, low-hardness, high-elongation-at-break polyurethane elastomer material composition and preparation method thereof, aiming to achieve both a low hardness below Shore A30 and a high elongation at break greater than 1000% without the addition of plasticizers. The core technology comprises two components, A (a prepolymer) and B (a polyol), mixed in a mass ratio of 30:100 to 90:100 at a mixing temperature of 20-50°C. The composition is cast with a gel time of greater than 30 minutes, cured at room temperature for 24 hours, and then stored at room temperature for 168 hours. The resulting material exhibits a tensile strength of 1.5-6 MPa, an elongation at break of 1000-1500%, and a hardness of 10-30 Shore A. Objectively speaking, the product obtained in this case not only has the properties of being plasticizer-free, low hardness, good elasticity, and high elongation at break, but is also safe, environmentally friendly, and easy to apply. However, this product suffers from poor temperature adaptability (20-50°C) and a long curing time, which seriously affects the construction progress. It cannot meet the requirements for rapid construction and restoration of traffic conditions under heavy traffic conditions.

[0007] In addition, during the application process, the polyurethane elastic composition of the prior art has unstable factors in combination with the expansion joint steel.

[0008] How to further improve the product's adaptability to a wide temperature range (-5~50°C); shorten the gel time (10-30 minutes), and control the room temperature curing time to 1-2 hours, so as to adapt to the requirements of large-scale transportation, has become a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0009] In response to the above technical problems, the present invention provides a polymer material, preparation method and application for quickly filling expansion joints under heavy traffic conditions. The polymer material can be cast on site at normal temperature and pressure, quickly gel and solidify, and has low modulus, high elongation, weather aging resistance, high and low temperature resistance, and self-repair function after puncture.

[0010] The present invention discloses a polymer material for rapidly filling expansion joints under heavy traffic conditions, comprising component A and component B. The A component includes the following components in parts by mass: 100 parts of polyurethane prepolymer, 1-5 parts of inhibitor, 1-10 parts of carbon black and 1-10 parts of comprehensive antioxidant, The B component includes the following components in parts by mass: 100 parts of polyether polyol, 1-3 parts of chain extender, 0.1-2 parts of accelerator, 1-2 parts of defoaming agent, 0.1-2 parts of catalyst and 1-5 parts of ultraviolet absorber; The mass ratio of component A to component B during application is 90-110:110-90, the ambient temperature during mixing is -5-50°C, and after injection into the expansion joint, the gel time is 10-30 minutes and the curing time is 1-2 hours.

[0011] Furthermore, the catalyst in the B component is: (Z)-4-oxopent-2-en-2-olate, pentane, tin (4+) dibutyltin dilaurate, Used to change the chemical reaction rate, control the chemical balance, and achieve rapid gel curing.

[0012] Furthermore, the accelerator in the B component is p-benzoquinone dioxime, which is used to increase the cross-linking speed.

[0013] Furthermore, the comprehensive antioxidant in the A component is: One or a combination of any two or more of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate AT, UC and 2,2,4-trimethyl-1,2-dihydroquinoline polymer.

[0014] Furthermore, the inhibitor in the component A is one or a combination of any two or more of octylated diphenylamine and 9,9-dimethylacridine.

[0015] Furthermore, the ultraviolet absorber in the B component is prepared by mixing 2-hydroxy-4-methoxybenzophenone and bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate in a mass / molar ratio of 0.1-1.5:0.1-1.5.

[0016] Furthermore, 1-15 parts of a plasticizer are added to the component A and / or component B.

[0017] The present invention provides a method for preparing a polymer material for rapidly filling expansion joints under heavy traffic conditions. The preparation method of component A is as follows: The polyurethane prepolymer, inhibitor, carbon black, plasticizer and comprehensive antioxidant are weighed and placed in a vacuum kettle. The mixture is stirred and blended at a temperature of 100-110°C for 120-180 minutes for dehydration treatment to obtain liquid component A. The mixture is then canned, nitrogen-filled and sealed for storage. The preparation method of the B component is: The polyether polyol, chain extender, accelerator, defoamer, catalyst, plasticizer and ultraviolet absorber are weighed and put into a vacuum kettle, and mixed for 60-120 minutes at 80-100° C. and vacuum degree 0.08-0.09 MPa to obtain liquid component B; the mixture is canned, nitrogen-filled and sealed for storage.

[0018] Furthermore, the kinematic viscosity of the prepared component A is 4000-5000 centistokes, and the kinematic viscosity of the prepared component B is 1000-2000 centistokes.

[0019] The polymer material of the present invention is used in expansion joints of pavements and bridge decks. Component A and component B are mixed and stirred in a vacuum container at a mass ratio of 90-110:110-90 at a temperature of -5-50°C for 2-5 minutes. Then the vacuum protection is released and the mixed material is poured into the expansion joint of the road surface or bridge deck. After a gelling time of 10-30 minutes and a curing time of 1-2 hours, an elastomer with an interconductive network is formed.

[0020] This invention innovatively incorporates p-benzoquinone dioxime as an accelerator in component B, significantly shortening gelation and curing times, meeting the current demand for rapid restoration of road traffic under heavy traffic conditions. This accelerator not only shortens the curing time but also forms an excellent affinity with the metal components on both sides of the expansion joint assembly. Furthermore, its addition decomposes p-phenylenediamine during the preparation process, providing an anti-aging effect. The specific technical measures taken for components A and B ensure that the resulting product possesses low modulus, which does not affect the expansion joint's telescopic function, strong adhesion to metal, resistance to weathering, water resistance, and self-repair after puncture. DETAILED DESCRIPTION

[0021] The present invention discloses a polymer material for rapidly filling expansion joints under heavy traffic conditions, comprising component A and component B. Component A includes the following components in parts by mass: 100 parts of polyurethane prepolymer, 1-5 parts of inhibitor, 1-10 parts of carbon black and 1-10 parts of comprehensive antioxidant, The B component includes the following components in parts by mass: 100 parts of polyether polyol, 1-3 parts of chain extender, 0.1-2 parts of accelerator, 1-2 parts of defoaming agent, 0.1-2 parts of catalyst and 1-5 parts of ultraviolet absorber; The mass ratio of component A to component B during application is 90~110:110~90. The ambient temperature during mixing is -5~50℃. After injection into the expansion joint, the gel time is 10-30 minutes and the curing time is 1-2 hours.

[0022] The polyurethane prepolymer in the above component A is prepared by the following measures: 10-35% of polypropylene oxide ether diol (molecular weight 400-4000), 30-50% of polyether polyol, and 10-40% of diphenylmethane diisocyanate (MDI) are reacted at 80-100° C. for 2-3 hours to prepare the polyurethane prepolymer.

[0023] Furthermore, the catalyst in component B is: (Z)-4-oxopent-2-en-2-olate, pentane, tin(4+) dibutyltin dilaurate, Used to change the chemical reaction rate, control the chemical balance, and achieve rapid gel curing.

[0024] Furthermore, the accelerator in the B component is p-benzoquinone dioxime, which is used to increase the cross-linking speed.

[0025] This invention innovatively incorporates p-benzoquinone dioxime into the composition, which has the following three benefits: First, this component is highly active, increasing the crosslinking speed and thereby shortening the gel and cure times. Second, due to its extremely high activity, this component has a high affinity for metal surfaces. Third, because the application environment in this case involves process steps exceeding 90°C, this component can decompose into p-phenylenediamine during this step, providing the product with resistance to high temperatures and photooxidative aging.

[0026] Furthermore, the comprehensive antioxidant in the A component is: One or a combination of any two or more of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate AT, UC and 2,2,4-trimethyl-1,2-dihydroquinoline polymer.

[0027] There are three basic mechanisms for the aging of composite elastomers: the first is heterolytic cleavage: when a single bond breaks, two electrons are left on one of the fragments, and two electron holes will appear on the other fragment. The second is homolytic cleavage: homolytic cleavage is also known as the free radical mechanism. In this reaction, when a single bond breaks, an electron is left on each fragment. This is the mechanism that occurs most frequently and is most obvious during the aging process of rubber. The third is cyclization. From a thermochemical point of view, when the reaction free energy G during the aging period of the composite elastomer is less than the free energy of the reactants, the chemical reaction required for aging can occur inside the rubber. Generally, anti-aging additives are added to prevent the aging of the material itself. The principles and methods are (1) free radical inhibitors; (2) antiozonants; (3) light stabilizers; (4) peroxide decomposers, etc. The principle of the above four anti-aging agents used in this case is to prevent the composite material (mainly the polyurethane prepolymer in component A and the polyether polyol in component B) from reacting with free radicals and forcibly stop the free radical chain reaction within it.

[0028] In addition, anti-aging agents can also react with corresponding substances to produce peroxides and generate compounds with strong stability, thereby maintaining the stability of the internal structure of the composite elastomer and inhibiting the occurrence of aging.

[0029] At the same time, physical protection can also be carried out, such as adding carbon black to block ultraviolet penetration, prevent ultraviolet aging, and have strong resistance to external interference such as microwave radiation, ozone, and heat.

[0030] The surface of the composite material is sprayed with an anti-aging coating.

[0031] Furthermore, the inhibitor in component A is one or a combination of two or more of octylated diphenylamine and 9,9-dimethylacridine. The inhibitor's function is to inhibit premature crosslinking and regulate the crosslinking rate after pouring, ensuring safer handling of the material during use and avoiding material waste caused by premature crosslinking. Both materials also provide protection against photooxidative aging, creating a synergistic effect with the antioxidant.

[0032] Furthermore, the ultraviolet absorber in component B is prepared by mixing 2-hydroxy-4-methoxybenzophenone and bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate in a mass / molar ratio of 0.1-1.5:0.1-1.5, which can absorb ultraviolet rays of different wavelengths.

[0033] Furthermore, 1-15 parts of plasticizer are added to the A component and / or B component. Since the molecular motion of polyurethane material slows down under low temperature conditions, resulting in poor flexibility, increased hardness and enhanced brittleness, in order to solve this problem, plasticizer C is added. 16 H 22O4 makes its molecular chain flexible at low temperature and its elongation becomes longer.

[0034] The present invention provides a method for preparing a polymer material for rapidly filling expansion joints under heavy traffic conditions. The preparation method of component A is as follows: The polyurethane prepolymer, inhibitor, carbon black and comprehensive antioxidant are weighed and placed in a vacuum kettle. The mixture is stirred and blended at a temperature of 100-110°C for 120-180 minutes for dehydration treatment to obtain liquid component A. The mixture is then canned and sealed with nitrogen for storage. The preparation method of the B component is: The polyether polyol, chain extender, accelerator, defoamer, catalyst and ultraviolet absorber are weighed and put into a vacuum kettle, and mixed for 60-120 minutes at 80-100° C. and vacuum degree 0.08-0.09 MPa to obtain liquid component B; the mixture is canned, nitrogen-filled and sealed for storage.

[0035] Furthermore, the kinematic viscosity of the prepared component A is 4000-5000 centistokes, and the kinematic viscosity of the prepared component B is 1000-2000 centistokes.

[0036] The polymer material prepared by the present invention is used in expansion joints of pavements and bridge decks. Component A and component B are mixed and stirred in a vacuum container at a mass ratio of 90-110:110-90 at a temperature of -5-50°C for 2-5 minutes. Then the vacuum protection is released and the mixed material is poured into the expansion joint of the road surface or bridge deck. After a gelling time of 10-30 minutes and a curing time of 1-2 hours, an elastomer with an interconductive network is formed.

[0037] Example 1 Preparation of component A: 100 parts of polyurethane prepolymer, 1 part of inhibitor, 1 part of carbon black, 1 part of plasticizer and 1 part of comprehensive antioxidant were weighed and placed in a vacuum kettle. The mixture was stirred and blended at 110°C for 180 minutes for dehydration treatment to obtain liquid component A. The mixture was canned and sealed with nitrogen for storage. The preparation method of the B component is: 100 parts of polyether polyol, 1 part of chain extender, 0.1 part of accelerator, 1 part of defoamer, 0.1 part of catalyst and 1 part of ultraviolet absorber were weighed and put into a vacuum kettle, and blended for 120 minutes at 100°C and a vacuum degree of 0.09 MPa to obtain liquid component B; the mixture was canned and sealed with nitrogen for storage.

[0038] The application construction work was carried out at ambient temperatures of -5, 10, 25, and 50°C, and the test performance indicators in Table 1 were obtained.

[0039] Table 1: Example 2 Preparation of component A: 100 parts of polyurethane prepolymer, 5 parts of inhibitor, 10 parts of carbon black, 15 parts of plasticizer and 10 parts of comprehensive antioxidant were weighed and placed in a vacuum kettle. The mixture was stirred and blended at 100°C for 120 minutes for dehydration to obtain liquid component A. The mixture was canned and sealed with nitrogen for storage. The preparation method of the B component is: 100 parts of polyether polyol, 3 parts of chain extender, 2 parts of accelerator, 2 parts of defoamer, 2 parts of catalyst and 5 parts of ultraviolet absorber were weighed and put into a vacuum kettle, and blended for 60 minutes at 80°C and a vacuum degree of 0.08 MPa to obtain liquid component B; the mixture was canned and sealed with nitrogen for storage.

[0040] The application construction work was carried out at ambient temperatures of -5, 10, 25, and 50°C, and the test performance indicators in Table 2 were obtained.

[0041] Table 2: Example 3 Preparation of component A: 100 parts of polyurethane prepolymer, 2.5 parts of inhibitor, 5 parts of carbon black, 7.5 parts of plasticizer and 5 parts of comprehensive antioxidant were weighed and placed in a vacuum kettle. The mixture was stirred and blended at 105°C for 150 minutes for dehydration. Liquid component A was obtained. The mixture was canned and sealed with nitrogen for storage. The preparation method of the B component is: 100 parts of polyether polyol, 2 parts of chain extender, 1 part of accelerator, 0.5 parts of defoamer, 1 part of catalyst and 2.5 parts of ultraviolet absorber were weighed and put into a vacuum kettle, and blended for 100 minutes at 90°C and a vacuum degree of 0.08 MPa to obtain liquid component B; the mixture was canned and sealed with nitrogen for storage.

[0042] The application construction work was carried out at ambient temperatures of -5, 10, 25 and 50°C, and the test performance indicators in Table 3 were obtained.

[0043] Table 3: The samples of the above different embodiments were selected and subjected to strength tests, as shown in Table 4.

[0044] Table 4 The above experimental data demonstrates that Component A in the present invention is primarily composed of isocyanate. When mixed with Component B, a polyether polyol, the isocyanate rapidly reacts with the active hydrogen hydroxyl groups in the polyether at room temperature and pressure to form a carbamate, effectively creating a polyurethane elastomer. By adjusting the mixing ratio, a polyurethane elastomer with a hardness of 5-10 Shore A can be formed. This elastomer exhibits exceptionally low hardness, inherently low elastic modulus and set stress, and exhibits exceptional elongation exceeding 1000% and compression resistance exceeding 90%.

[0045] This invention utilizes the reversible nature of ionic and hydrogen bonds in polymer materials, polymer modification, and unsaturated bond transfer principles to construct a room-temperature covalent supramolecular network crosslinking technology through a thiol-ene reaction. This technology achieves a 100% room-temperature self-repair rate and a 98% strain recovery rate, resulting in a novel "damping" composite material with excellent self-repair and shape memory capabilities. The material has a relatively low molecular weight, a narrow molecular weight distribution, low intermolecular forces, a low crosslink density, and low bond energy.

[0046] The material of the present invention has the following characteristics: 1) Excellent puncture resistance and self-repairing function; when the product is punctured by stones, foreign objects, etc., the punctured object will be removed from the puncture site due to the rebound force. Since the material itself has a hardness of 5-10 Shore A after solidification, the viscosity is extremely high, and the distance between molecules is extremely close. According to the van der Waals attraction and hydrogen bond force, with the help of Brownian motion, the polar groups and chain links on the two interfaces approach each other and diffuse rapidly to the punctured interface, forming self-repair under the action of hydrogen bond force, realizing the product recycling function.

[0047] 2) Super strong damping shape memory function; since the material itself has a hardness of 5-10 Shore A after curing, extremely high viscosity, and extremely close distance between molecules, according to van der Waals attraction and hydrogen bonding force, with the help of Brownian motion, the polar groups and chain links on the two interfaces approach each other, and the pierced interface quickly diffuses with each other, forming self-repair under the action of hydrogen bonding force; at the same time, the chain ends of the rubber molecules are easy to move, and when subjected to external forces, they are more likely to hinder external changes.

[0048] 3) Extremely large compression deformation and extremely low compression stress; Since the molecular weight of the components used in the present invention is relatively low, the molecular weight distribution is narrow, the intermolecular force is small, the cross-linking bond density is small and the bond energy is low, it has extremely large compression deformation and extremely low compression stress.

[0049] 4) Plasticity into any shape; Reasons: low hardness, low intermolecular force, and low cross-linking bond energy.

[0050] 5) Extremely high elongation at break and extremely low tensile stress. The reason is the same as 3).

[0051] 6) It has an extremely low cross-linking temperature and a fast cross-linking time. When the isocyanate in component A and the polyether polyol in component B are mixed, the isocyanate can quickly react with the active hydrogen of the hydroxyl group in the polyether at room temperature and pressure to form carbamate, achieving rapid curing. After use, in a large traffic environment, the simplest construction process and the fastest curing time can be achieved; thus, the road can be restored to normal in the shortest time.

[0052] 7) Self-compacting and waterproof, with strong waterproof performance; the intermolecular force of polymer materials is greater than the intermolecular force of water, and water cannot penetrate the polymer network bonds.

[0053] 8) Resistance to extreme high and low temperatures. Adding a chain extender during polymerization increases the length of the chemical bond, further improving the material's high-temperature resistance. Cis-butadiene participates in the copolymerization of the polymer, and the main chain of cis-butadiene has a high degree of freedom, requiring less energy for deformation. Furthermore, the presence of ether bonds in the polymer chain makes it relatively flexible at low temperatures, resulting in better low-temperature resistance. The antioxidant is a typical saturated linear polymer, with no double bonds or long chain branches in the molecular chain. Its structural units lack asymmetric carbon atoms, and are linked in a regular first-position sequence, resulting in excellent weather resistance.

[0054] In addition, it has strong resistance to UV rays and aging, and has high peel adhesion to metal, concrete and other inert materials.

[0055] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some of the technical features therein according to the disclosed technical content without creative labor, and these substitutions and modifications are all within the protection scope of the present invention.

Claims

1. A polymer material for rapidly filling expansion joints under heavy traffic conditions, comprising component A and component B, characterized in that: The A component includes the following components in parts by mass: 100 parts of polyurethane prepolymer, 1-5 parts of inhibitor, 1-10 parts of carbon black and 1-10 parts of comprehensive antioxidant, The B component includes the following components in parts by mass: 100 parts of polyether polyol, 1-3 parts of chain extender, 0.1-2 parts of accelerator, 1-2 parts of defoaming agent, 0.1-2 parts of catalyst and 1-5 parts of ultraviolet absorber; The mass ratio of component A to component B during application is 90-110:110-90, the ambient temperature during mixing is -5-50°C, and after injection into the expansion joint, the gel time is 10-30 minutes and the curing time is 1-2 hours.

2. The polymer material for rapidly filling expansion joints under heavy traffic conditions according to claim 1, characterized in that: The catalyst in the B component is: (Z)-4-oxopent-2-en-2-olate, pentane, tin (4+) dibutyltin dilaurate, Used to change the chemical reaction rate, control the chemical balance, and achieve rapid gel curing.

3. The polymer material for rapidly filling expansion joints under heavy traffic conditions according to claim 1, characterized in that: The accelerator in the B component is p-benzoquinone dioxime, which is used to increase the crosslinking speed.

4. The polymer filling material for quickly repairing expansion joints under heavy traffic conditions according to claim 1 is characterized in that: The comprehensive antioxidant in the A component is: One or a combination of any two or more of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate AT, UC and 2,2,4-trimethyl-1,2-dihydroquinoline polymer.

5. The polymer material for rapidly filling expansion joints under heavy traffic conditions according to claim 1, characterized in that: The inhibitor in the component A is one or a combination of any two or more of octylated diphenylamine and 9,9-dimethylacridine.

6. The polymer material for rapidly filling expansion joints under heavy traffic conditions according to claim 1, characterized in that: The ultraviolet absorber in the B component is prepared by mixing 2-hydroxy-4-methoxybenzophenone and bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate in a mass / molar ratio of 0.1-1.5:0.1-1.

5.

7. The polymer material for rapidly filling expansion joints under heavy traffic conditions according to claim 1, characterized in that: 1-15 parts of plasticizer are also added to the A component and / or the B component.

8. A method for preparing a polymer material for rapidly filling expansion joints under heavy traffic conditions as claimed in any one of claims 1 to 7, characterized in that: The preparation method of component A is as follows: The polyurethane prepolymer, inhibitor, carbon black, plasticizer and comprehensive antioxidant are weighed and placed in a vacuum kettle. The mixture is stirred and blended at a temperature of 100-110°C for 120-180 minutes for dehydration treatment to obtain liquid component A. The mixture is then canned, nitrogen-filled and sealed for storage. The preparation method of the B component is: The polyether polyol, chain extender, accelerator, defoamer, catalyst, plasticizer and ultraviolet absorber are weighed and put into a vacuum kettle, and mixed for 60-120 minutes at 80-100° C. and vacuum degree 0.08-0.09 MPa to obtain liquid component B; the mixture is canned, nitrogen-filled and sealed for storage.

9. The preparation method according to claim 1, characterized in that The kinematic viscosity of the prepared component A is 4000-5000 centistokes, and the kinematic viscosity of the prepared component B is 1000-2000 centistokes.

10. Use of any polymer material according to claims 1 to 7 in expansion joints of pavements and bridge decks, characterized in that: Component A and component B are placed in a vacuum container at a mass ratio of 90-110:110-90, mixed and stirred for 2-5 minutes at a temperature of -5-50°C. Then the vacuum protection is released and the mixed material is poured into the expansion joint of the road surface or bridge deck. After a gelling time of 10-30 minutes and a curing time of 1-2 hours, an elastomer with an interconductive network is formed.

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