High-insulation elastic isolation material of prefabricated track plate for track traffic and preparation method of high-insulation elastic isolation material

Abstract

The invention relates to a high-insulation elastic isolation material for a track traffic prefabricated track board and a preparation method thereof, the isolation material is sprayed on the position, in contact with cast-in-place concrete, of the prefabricated track board to form an insulation isolation layer which is attached to the prefabricated track board and has a certain thickness, and the insulation isolation layer is composed of a component A and a component B, the component A is prepared from polypropylene oxide-castor oil polyol, tetrahydrofuran-propylene oxide copolymerized glycol, 1, 6-hexanediol, toluene diisocyanate and isophorone diisocyanate, and the component B is prepared from 1, 2-propylene glycol, ethylene glycol, diethylene glycol, diethylenetriamine and 4, 4 '-di-tert-octyl-diphenylamine; therefore, the cast-in-place concrete and the prefabricated slab are isolated, replacement is convenient, the buffering effect is provided to avoid the stress concentration problem, water seepage and stray current protection are prevented, the service life is prolonged, and cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of isolation and insulation of prefabricated track slabs, and in particular to a high-insulation elastic isolation material for a prefabricated track slab for rail transit and a preparation method thereof. Background Art

[0002] In recent years, with the advancement of my country's urbanization process, the scale of cities has continued to expand, and various problems faced by large cities have gradually become prominent, among which traffic congestion is one of the biggest challenges facing major cities. Urban rail transit can alleviate the problem of citizens' travel difficulties to a certain extent, so the construction of rail transit in major cities has developed rapidly in recent years.

[0003] Due to the rapid development of subway projects, prefabricated track slabs with high early strength and fast mold turnover have been widely used in subway construction. Most prefabricated track slabs are cured and formed by steam curing. The cement hydration speed is accelerated in the steam curing environment, and it has high early strength. However, the faster reaction speed also makes the internal pores of the concrete coarser than the standard curing concrete, and the impermeability is worse, which creates favorable conditions for the propagation of stray currents common in subway projects in prefabricated components. The stray currents propagating underground through prefabricated components will cause electrochemical corrosion of the internal steel bars and underground metal pipe networks of the components. When the track continues to pass through stray currents, it is easy to corrode up to about 10kg of metal pipes. Moreover, if there is no isolation buffer between cast-in-place concrete and prefabricated slabs, it is easy to cause direct transmission of vibration. In the long run, current corrosion and vibration are likely to cause serious economic and environmental problems, and will also affect the safe operation of the subway track system and threaten the lives of passengers.

[0004] To this end, in view of the above-mentioned defects, the designers of the present invention have devoted themselves to research and design, and combined the experience and achievements of many years in related industries to research and design a high-insulation elastic isolation material for prefabricated track plates for rail transit and a preparation method thereof to overcome the above-mentioned defects. Summary of the invention

[0005] The object of the present invention is to provide a high-insulation elastic isolation material for rail transit prefabricated track plates and a preparation method thereof, which can overcome the defects of the prior art, isolate the cast-in-place concrete from the prefabricated plates, facilitate replacement, provide a buffering effect to avoid stress concentration problems, prevent water seepage and stray current protection, increase service life, and reduce costs.

[0006] To achieve the above object, the present invention discloses a high-insulation elastic isolation material for a rail transit prefabricated track plate, which is sprayed on the position of the prefabricated track plate in contact with the cast-in-place concrete to form an insulating isolation layer with a certain thickness attached to the prefabricated track plate, and is characterized in that it is composed of component A and component B:

[0007] The component A comprises polyoxypropylene-castor oil polyol, tetrahydrofuran-oxypropylene copolymer glycol, 1,6-hexanediol, toluene diisocyanate and isophorone diisocyanate, and the component B comprises 1,2-propylene glycol, ethylene glycol, diethylene glycol, diethylenetriamine and 4,4'-di-tert-octyl-diphenylamine.

[0008] Wherein: the mass parts of the component A (total 100) are:

[0009] Polyoxypropylene-castor oil polyol: 27.0~28.5;

[0010] Tetrahydrofuran-propylene oxide copolymer glycol: 35.0~36.0;

[0011] 1,6-Hexanediol: 9.0~12.0;

[0012] Toluene diisocyanate: 13.0~16.0;

[0013] Isophorone diisocyanate: 10.0~16.0.

[0014] Wherein: the mass parts of the said component B (total 100) are:

[0015] 1,2-Propanediol: 41-47;

[0016] Ethylene glycol: 22-27;

[0017] Diethylene glycol: 22-28;

[0018] Diethylenetriamine: 4-7;

[0019] 4,4'-di-tert-octyl-diphenylamine: 0.1~0.3.

[0020] Among them: component A and component B (mass ratio) is 1:0.03~0.05. After the two are mixed and stirred evenly, they are brushed or rolled on the surface of the prefabricated track slab to achieve insulation, isolation, waterproofing and vibration reduction effects.

[0021] in:

[0022] The mass parts of component A (total 100) are:

[0023] Polyoxypropylene-castor oil polyol: 28.0;

[0024] Tetrahydrofuran-propylene oxide copolymer glycol: 35.5;

[0025] 1,6-Hexanediol: 9.0;

[0026] Toluene diisocyanate: 16.0;

[0027] Isophorone diisocyanate: 11.5;

[0028] The mass parts of component B (total 100) are:

[0029] 1,2-Propanediol: 46;

[0030] Ethylene glycol: 22;

[0031] Diethylene glycol: 26;

[0032] Diethylenetriamine: 5.9;

[0033] 4,4'-di-tert-octyl-diphenylamine: 0.1.

[0034] Wherein: the mass parts of component A (total 100) are:

[0035] Polyoxypropylene-castor oil polyol: 27.0;

[0036] Tetrahydrofuran-propylene oxide copolymer glycol: 35.0;

[0037] 1,6-Hexanediol: 10.0;

[0038] Toluene diisocyanate: 13.0;

[0039] Isophorone diisocyanate: 15.0;

[0040] The mass parts of component B (total 100) are: 1,2-propylene glycol: 45.5;

[0041] Ethylene glycol: 24.5;

[0042] Diethylene glycol: 24.9;

[0043] Diethylenetriamine: 4.9;

[0044] 4,4'-di-tert-octyl-diphenylamine: 0.2.

[0045] Wherein: the mass parts of component A (total 100) are:

[0046] Polyoxypropylene-castor oil polyol: 28.5;

[0047] Tetrahydrofuran-propylene oxide copolymer glycol: 36;

[0048] 1,6-Hexanediol: 10.5;

[0049] Toluene diisocyanate: 12.0;

[0050] Isophorone diisocyanate: 13.0;

[0051] The mass parts of component B (total 100) are: 1,2-propylene glycol: 44.0;

[0052] Ethylene glycol: 25.0;

[0053] Diethylene glycol: 25.7;

[0054] Diethylenetriamine: 5;

[0055] 4,4'-di-tert-octyl-diphenylamine: 0.3.

[0056] Wherein: the mass parts of component A (total 100) are:

[0057] Polyoxypropylene-castor oil polyol (molecular weight 1300): 28.5; Tetrahydrofuran-oxypropylene copolymer glycol (molecular weight 1500): 35.0;

[0058] 1,6-Hexanediol: 10.5;

[0059] Toluene diisocyanate: 15.0;

[0060] Isophorone diisocyanate: 11.0;

[0061] The mass parts of component B (total 100) are:

[0062] 1,2-Propanediol: 47.0;

[0063] Ethylene glycol: 23.0;

[0064] Diethylene glycol: 23.8;

[0065] Diethylenetriamine: 6.0;

[0066] 4,4'-di-tert-octyl-diphenylamine: 0.2.

[0067] Also disclosed is a method for preparing the above-mentioned high-insulation elastic isolation material for the rail transit prefabricated track plate, which is characterized by comprising the following steps:

[0068] Step 1: Add polyoxypropylene-castor oil polyol, tetrahydrofuran-oxypropylene copolymer glycol, and 1,6-hexanediol in component A into the reaction kettle, start the stirrer, and heat to about 60°C, start the vacuum pump, slowly increase the vacuum degree to 0.095-0.1, and heat to 110-120°C, and maintain for 4 hours;

[0069] Step 2: Cool down to 80°C, add toluene diisocyanate and isophorone diisocyanate in component A simultaneously, stir and react for 5 hours under vacuum, then discharge component A and place in a sealed container under nitrogen protection for later use;

[0070] Step 3: Add 1,2-propylene glycol, ethylene glycol and diethylene glycol in component B into the reaction kettle respectively, start the vacuum pump, slowly increase the vacuum degree to 0.095-0.1 (gauge negative pressure), increase the temperature to 120-125°C, and maintain for 2 hours;

[0071] Step 4: lower the temperature to 50°C, add diethylenetriamine and 4,4'-di-tert-octyl-diphenylamine in component B, stir under vacuum for 1 hour, then discharge component B, and place in a sealed container under nitrogen protection for later use;

[0072] Step 5: Mix component A and component B (mass ratio) = 1:0.03-0.05, stir evenly and it can be used.

[0073] Among them: After use, the technical indicators in Table 1 are achieved:

[0074] Table 1 Technical indicators

[0075]

[0076]

[0077] From the above content, it can be known that the high insulation elastic isolation material of the rail transit prefabricated track plate of the present invention and the preparation method thereof have the following effects:

[0078] 1. The cast-in-place concrete and precast panels are isolated from each other, so that when the track panels need to be replaced after the operation of rail transit in the future, the track panels can be easily separated from the cast-in-place structure during lifting.

[0079] 2. It plays a certain buffering role in the limiting part of the track plate, avoiding the stress concentration problem of the track plate in the limiting structure; the isolation material also has good insulation and waterproof properties, which is beneficial to prevent water seepage on the surface of the track plate and protect against stray current, thereby improving the durability of the track plate.

[0080] 3. It can be firmly bonded to the track plate, is resistant to acid, alkali and salt corrosion, hydrolysis, wear, oil, high temperature of 150°C, low temperature of -80°C, UV aging, fatigue, excellent shock absorption and noise reduction performance, suitable for high-frequency flexure applications, excellent comprehensive performance, and adaptable to dynamic load deformation.

[0081] The details of the present invention can be obtained from the following description. DETAILED DESCRIPTION

[0082] The invention relates to a high-insulation elastic isolation material for a prefabricated track plate for rail transportation and a preparation method thereof.

[0083] The high-insulation elastic isolation material of the rail transit prefabricated track plate is sprayed on the position where the prefabricated track plate contacts the cast-in-place concrete to form an insulating isolation layer with a certain thickness attached to the prefabricated track plate, which is mainly composed of component A and component B, wherein the component A comprises polyoxypropylene-castor oil polyol (molecular weight of 1300), tetrahydrofuran-oxypropylene copolymer diol (molecular weight of 1500), toluene diisocyanate and isophorone diisocyanate (polyoxypropylene-castor oil polyol and tetrahydrofuran-oxypropylene copolymer diol can better provide the hydroxyl groups required in the copolymerization reaction, toluene diisocyanate and isophorone diisocyanate can provide the isocyanate groups in the copolymerization reaction, and the component A with urethane groups and isocyanate groups as the main components is generated during the reaction, wherein the urethane groups are prepolymerized parts, and the isocyanate groups will further react with the hydroxyl groups in the component B to generate The second component comprises 1,2-propylene glycol, ethylene glycol, diethylene glycol, diethylenetriamine and 4,4'-di-tert-octyl-diphenylamine (1,2-propylene glycol, ethylene glycol and diethylene glycol are all raw materials containing hydroxyl groups, which provide hydroxyl groups required for the polymerization reaction, and further react with the isocyanate groups in the first component under the action of suitable environment and auxiliary agents. Among them, 1,2-propylene glycol can improve the ductility of the final synthetic material; ethylene glycol can improve the antifreeze performance of the material; diethylene glycol can improve the insulation performance of the material. Diethylenetriamine and 4,4'-di-tert-octyl-diphenylamine are both chain extenders, among which diethylenetriamine can extend the molecular chain length of the urethane group, making the final synthetic material more elastic; 4,4'-di-tert-octyl-diphenylamine has a catalytic effect of accelerating the reaction while extending the chain, and can adjust the reaction time of the first and second components, which is convenient for on-site construction).

[0084] In a preferred embodiment of the present invention, the mass parts of the component A (total 100) are:

[0085] Polyoxypropylene-castor oil polyol (molecular weight 1300): 27.0-28.5;

[0086] Tetrahydrofuran-propylene oxide copolymer glycol (molecular weight 1500): 35.0-36.0;

[0087] 1,6-Hexanediol: 9.0~12.0;

[0088] Toluene diisocyanate: 13.0~16.0;

[0089] Isophorone diisocyanate: 10.0~16.0.

[0090] The mass parts of the second component (total 100) are:

[0091] 1,2-Propanediol: 41-47;

[0092] Ethylene glycol: 22-27;

[0093] Diethylene glycol: 22-28;

[0094] Diethylenetriamine: 4-7;

[0095] 4,4'-di-tert-octyl-diphenylamine: 0.1~0.3.

[0096] The mass ratio of component A to component B is 1:0.03-0.05 (through this specific mass ratio, the final product can be a highly elastic and tough material with a certain structural strength based on urethane. When subjected to force, it can absorb part of the energy by material deformation, thereby playing an excellent vibration reduction role. The coating position is between the two layers of concrete structure, which can separate the two layers of concrete. The material can also play an excellent isolation role). After the two are mixed and stirred evenly, they are brushed or rolled on the surface of the prefabricated track plate to achieve insulation, isolation, waterproofing and vibration reduction effects.

[0097] The present invention also relates to a method for preparing a high-insulation elastic isolation material for a rail transit prefabricated track plate, comprising the following steps:

[0098] Step 1: Add polyoxypropylene-castor oil polyol, tetrahydrofuran-oxypropylene copolymer glycol and 1,6-hexanediol in component A into the reaction kettle, start the agitator, and heat to about 60°C, start the vacuum pump, slowly increase the vacuum degree to 0.095-0.1 (gauge pressure negative pressure), increase the temperature to 110-120°C, and maintain for about 4 hours.

[0099] Step 2: Cool down to 80°C, add toluene diisocyanate and isophorone diisocyanate in component A simultaneously, stir and react for 5 hours under vacuum, then discharge component A and place in a sealed container under nitrogen protection for later use.

[0100] Step 3: Add 1,2-propylene glycol, ethylene glycol, diethylene glycol and white carbon black in component B into the reactor respectively, start the vacuum pump, slowly increase the vacuum degree to 0.095-0.1 (gauge negative pressure), raise the temperature to 120-125°C, and maintain for about 2 hours.

[0101] Step 4: lower the temperature to 50°C, add diethylenetriamine and 4,4'-di-tert-octyl-diphenylamine in component B, stir under vacuum for 1 hour, then discharge component B, and place in a sealed container under nitrogen protection for later use;

[0102] Step 5: Mix component A and component B (mass ratio) at 1:0.03-0.05, stir evenly and then it can be used. Apply by brushing or rolling on the surface of the prefabricated track slab to form an insulating isolation layer to achieve insulation, isolation, waterproofing and vibration reduction effects.

[0103] The insulating isolation layer formed by the above method can achieve the technical indicators in Table 1.

[0104] Table 1 Technical indicators

[0105]

[0106]

[0107] The following is further described in detail through several specific embodiments: Specific embodiment one:

[0109] The mass parts of component A (total 100) are:

[0110] Polyoxypropylene-castor oil polyol (molecular weight 1300): 28.0;

[0111] Tetrahydrofuran-propylene oxide copolymer glycol (molecular weight 1500): 35.5;

[0112] 1,6-Hexanediol: 9.0;

[0113] Toluene diisocyanate: 16.0;

[0114] Isophorone diisocyanate: 11.5.

[0115] The mass parts of component B (total 100) are:

[0116] 1,2-Propanediol: 46;

[0117] Ethylene glycol: 22;

[0118] Diethylene glycol: 26;

[0119] Diethylenetriamine: 5.9;

[0120] 4,4'-di-tert-octyl-diphenylamine: 0.1.

[0121] After preparing component A and component B according to the above method, they are mixed and stirred evenly in a mass ratio of 1:0.03. Through measurement, the technical indicators in Table 2 are achieved.

[0122] Table 2 Technical indicators of embodiment 1

[0123]

[0124] Specific embodiment 2:

[0126] The mass parts of component A (total 100) are:

[0127] Polyoxypropylene-castor oil polyol (molecular weight 1300): 27.0; Tetrahydrofuran-oxypropylene copolymer glycol (molecular weight 1500): 35.0; 1,6-hexanediol: 10.0;

[0128] Toluene diisocyanate: 13.0;

[0129] Isophorone diisocyanate: 15.0.

[0130] The mass parts of component B (total 100) are:

[0131] 1,2-Propanediol: 45.5;

[0132] Ethylene glycol: 24.5;

[0133] Diethylene glycol: 24.9;

[0134] Diethylenetriamine: 4.9;

[0135] 4,4'-di-tert-octyl-diphenylamine: 0.2;

[0136] After preparing component A and component B according to the above method, they are mixed and stirred evenly in a mass ratio of 1:0.04. Through measurement, the technical indicators in Table 3 are achieved.

[0137] Table 3 Technical indicators of Example 2

[0138]

[0139] Specific embodiment three:

[0141] The mass parts of component A (total 100) are:

[0142] Polyoxypropylene-castor oil polyol (molecular weight 1300): 28.5;

[0143] Tetrahydrofuran-propylene oxide copolymer glycol (molecular weight 1500): 36;

[0144] 1,6-Hexanediol: 10.5;

[0145] Toluene diisocyanate: 12.0;

[0146] Isophorone diisocyanate: 13.0.

[0147] The mass parts of component B (total 100) are: 1,2-propylene glycol: 44.0;

[0148] Ethylene glycol: 25.0;

[0149] Diethylene glycol: 25.7;

[0150] Diethylenetriamine: 5;

[0151] 4,4'-di-tert-octyl-diphenylamine: 0.3;

[0152] After preparing component A and component B according to the above method, they are mixed and stirred evenly in a mass ratio of 1:0.05. Through measurement, the technical indicators in Table 4 are achieved.

[0153] Table 4 Technical indicators of Example 3

[0154] Specific embodiment four:

[0156] The mass parts of component A (total 100) are:

[0157] Polyoxypropylene-castor oil polyol (molecular weight 1300): 28.5;

[0158] Tetrahydrofuran-propylene oxide copolymer glycol (molecular weight 1500): 35.0;

[0159] 1,6-Hexanediol: 10.5;

[0160] Toluene diisocyanate: 15.0;

[0161] Isophorone diisocyanate: 11.0.

[0162] The mass parts of component B (total 100) are:

[0163] 1,2-Propanediol: 47.0;

[0164] Ethylene glycol: 23.0;

[0165] Diethylene glycol: 23.8;

[0166] Diethylenetriamine: 6.0;

[0167] 4,4'-di-tert-octyl-diphenylamine: 0.2;

[0168] After preparing component A and component B according to the above method, they are mixed and stirred evenly in a mass ratio of 1:0.05. Through measurement, the technical indicators in Table 5 are achieved.

[0169] Table 5 Technical indicators of Example 4

[0170]

[0171]

[0172] Through a large number of tests and experiments, it can be seen that the present invention can achieve the following characteristics comparison as shown in Table 6 compared with existing materials:

[0173] Table 6 Performance comparison of high insulation elastic isolation materials and waterproof coatings

[0174]

[0175]

[0176] It can be clearly seen from Table 6 that the high-insulation elastic isolation material of the rail transit prefabricated track plate of the present invention is firmly bonded to the track plate through the specific setting of the above-mentioned material components and proportions and the process, and its performance is excellent, and it is resistant to acid, alkali and salt corrosion, hydrolysis, wear, oil, high temperature resistance of 150°C, low temperature resistance of -80°C, UV aging resistance, fatigue resistance, and at the same time, it has excellent shock absorption and noise reduction performance, and is effectively suitable for high-frequency flexural applications. The insulating isolation layer formed by the material has excellent comprehensive performance, adapts to dynamic load deformation, and greatly improves the overall performance and service life.

[0177] It is obvious that the above description and record are only examples and are not intended to limit the disclosure, application or use of the present invention. Although described in the embodiments, the specific examples of the teachings of the present invention as the best mode currently considered are described in the embodiments, and the scope of the present invention will include any embodiment falling within the preceding description and the appended claims.

Claims

1. A high-insulation elastic isolation material for a rail transit prefabricated track plate, sprayed on the position where the prefabricated track plate contacts the cast-in-place concrete, forming an insulating isolation layer with a certain thickness attached to the prefabricated track plate, characterized in that It is composed of component A and component B: The component A comprises polyoxypropylene-castor oil polyol, tetrahydrofuran-oxypropylene copolymer glycol, 1,6-hexanediol, toluene diisocyanate and isophorone diisocyanate, and the component B comprises 1,2-propylene glycol, ethylene glycol, diethylene glycol, diethylenetriamine and 4,4'-di-tert-octyl-diphenylamine.

2. The high insulation elastic isolation material for rail transit prefabricated track slab according to claim 1, characterized in that: The mass parts of the component A (total 100) are: Polyoxypropylene-castor oil polyol: 27.0~28.5; Tetrahydrofuran-propylene oxide copolymer glycol: 35.0~36.0; 1,6-Hexanediol: 9.0~12.0; Toluene diisocyanate: 13.0~16.0; Isophorone diisocyanate: 10.0~16.

0.

3. The high insulation elastic isolation material for rail transit prefabricated track slab according to claim 2, characterized in that: The mass parts of the second component (total 100) are: 1,2-Propanediol: 41-47; Ethylene glycol: 22-27; Diethylene glycol: 22-28; Diethylenetriamine: 4-7; 4,4'-di-tert-octyl-diphenylamine: 0.1~0.

3.

4. The high insulation elastic isolation material for rail transit prefabricated track slab according to claim 3, characterized in that: The mass ratio of component A to component B is 1:0.03-0.

05. After the two are mixed and stirred evenly, they are brushed or rolled on the surface of the prefabricated track slab to achieve insulation, isolation, waterproofing and vibration reduction effects.

5. The high insulation elastic isolation material for rail transit prefabricated track slab according to claim 4, characterized in that: The mass parts of component A (total 100) are: Polyoxypropylene-castor oil polyol: 28.0; Tetrahydrofuran-propylene oxide copolymer glycol: 35.5; 1,6-Hexanediol: 9.0; Toluene diisocyanate: 16.0; Isophorone diisocyanate: 11.5; The mass parts of component B (total 100) are: 1,2-Propanediol: 46; Ethylene glycol: 22; Diethylene glycol: 26; Diethylenetriamine: 5.9; 4,4'-di-tert-octyl-diphenylamine: 0.

1.

6. The high insulation elastic isolation material for rail transit prefabricated track slab according to claim 4, characterized in that: The mass parts of component A (total 100) are: Polyoxypropylene-castor oil polyol: 27.0; Tetrahydrofuran-propylene oxide copolymer glycol: 35.0; 1,6-Hexanediol: 10.0; Toluene diisocyanate: 13.0; Isophorone diisocyanate: 15.0; The mass parts of component B (total 100) are: 1,2-Propanediol: 45.5; Ethylene glycol: 24.5; Diethylene glycol: 24.9; Diethylenetriamine: 4.9; 4,4'-di-tert-octyl-diphenylamine: 0.

2.

7. The high insulation elastic isolation material for rail transit prefabricated track slabs according to claim 4, characterized in that: The mass parts of component A (total 100) are: Polyoxypropylene-castor oil polyol: 28.5; Tetrahydrofuran-propylene oxide copolymer glycol: 36; 1,6-Hexanediol: 10.5; Toluene diisocyanate: 12.0; Isophorone diisocyanate: 13.0; The mass parts of component B (total 100) are: 1,2-Propanediol: 44.0; Ethylene glycol: 25.0; Diethylene glycol: 25.7; Diethylenetriamine: 5; 4,4'-di-tert-octyl-diphenylamine: 0.

3.

8. The high insulation elastic isolation material for rail transit prefabricated track slabs according to claim 4, characterized in that: The mass parts of component A (total 100) are: Polyoxypropylene-castor oil polyol (molecular weight 1300): 28.5; Tetrahydrofuran-propylene oxide copolymer glycol (molecular weight 1500): 35.0; 1,6-Hexanediol: 10.5; Toluene diisocyanate: 15.0; Isophorone diisocyanate: 11.0; The mass parts of component B (total 100) are: 1,2-Propanediol: 47.0; Ethylene glycol: 23.0; Diethylene glycol: 23.8; Diethylenetriamine: 6.0; 4,4'-di-tert-octyl-diphenylamine: 0.

2.

9. A method for preparing a high-insulation elastic isolation material for a prefabricated track slab for rail transit as claimed in any one of claims 3 to 8, characterized in that The following steps are included: Step 1: Add polyoxypropylene-castor oil polyol, tetrahydrofuran-oxypropylene copolymer glycol, and 1,6-hexanediol in component A into the reaction kettle, start the stirrer, and heat to about 60°C, start the vacuum pump, slowly increase the vacuum degree to 0.095-0.1, and heat to 110-120°C, and maintain for 4 hours; Step 2: Cool down to 80°C, add toluene diisocyanate and isophorone diisocyanate in component A simultaneously, stir and react for 5 hours under vacuum, then discharge component A and place in a sealed container under nitrogen protection for later use; Step 3: Add 1,2-propylene glycol, ethylene glycol and diethylene glycol in component B into the reaction kettle respectively, start the vacuum pump, slowly increase the vacuum degree to 0.095-0.1 (gauge negative pressure), increase the temperature to 120-125°C, and maintain for 2 hours; Step 4: lower the temperature to 50°C, add diethylenetriamine and 4,4'-di-tert-octyl-diphenylamine in component B, stir under vacuum for 1 hour, then discharge component B, and place in a sealed container under nitrogen protection for later use; Step 5: Mix component A and component B (mass ratio) = 1:0.03-0.05, stir evenly and it can be used.

10. The method for preparing the high insulation elastic isolation material for rail transit prefabricated track slabs according to claim 9, characterized in that: Achieve the technical indicators in Table 1: Table 1 Technical indicators

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