Copolymerization type epoxy modified emulsified asphalt material for asphalt pavement adhesive layer and preparation method of copolymerization type epoxy modified emulsified asphalt material

Abstract

The invention provides a copolymerization type epoxy modified emulsified asphalt material for an asphalt pavement adhesive layer and a preparation method of the copolymerization type epoxy modified emulsified asphalt material. The copolymerization type epoxy modified emulsified asphalt material is obtained by mixing modified asphalt and water and then performing high-speed shearing, the modified asphalt comprises the following raw materials in parts by weight: 100 parts of matrix asphalt, 20 parts of an oxidizing agent, 1-2 parts of phosphoric acid, 120-240 parts of polyether polyol, 0.6-2 parts of hydrogen, 4-7 parts of a metal catalyst, 8-24 parts of isocyanate, 2-3.2 parts of an organic metal catalyst and 20-48 parts of epoxy resin. The long-chain polyether polyol is used as a hydrophilic group, so that the emulsification difficulty of the modified asphalt can be effectively reduced, and self-emulsification of the asphalt is realized; the unsaturation degree of the modified asphalt is reduced through hydrogenation reaction, the influence of external environment factors such as water, oxygen and high and low temperatures is reduced, the weather resistance of the asphalt is improved, and the service life of the adhesive layer is prolonged; the epoxy resin is grafted on modified asphalt molecules, so that the cohesive strength and modulus of the modified asphalt can be effectively improved, the tensile strength is far higher than 0.8 MPa of conventional emulsified asphalt, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt materials, and in particular to a copolymerized epoxy-modified emulsified asphalt material for asphalt pavement tack layers and a preparation method thereof. Background Art

[0002] With the development of economy, the construction of a large number of high-grade highways and the reconstruction and expansion of expressways have put forward higher requirements for emulsified asphalt tack coats for asphalt pavement. On the one hand, it is necessary to effectively improve the adhesion between asphalt pavement layers and reduce the occurrence of diseases such as rutting and shifting. On the other hand, it is necessary to effectively resist the damage to the tack coat caused by the adhesion of wheel tracks, improve the ability of the tack coat to resist knocking, ensure the integrity of the tack coat, improve the waterproof performance, and reduce water damage. At present, the tack coat oil for asphalt base surfaces mainly includes conventional emulsified asphalt, non-stick wheel emulsified asphalt, and SBR latex modified emulsified asphalt. Conventional emulsified asphalt is directly emulsified with base asphalt, and is cheap, easy to obtain in large quantities, but it also has problems such as poor long-term road performance and large construction damage. Non-stick wheel emulsified asphalt is prepared by modifying asphalt with a non-stick wheel modifier and then adding an emulsifier for emulsification. It has the advantages of high-temperature non-stick wheels and small construction damage, but it also has disadvantages such as difficulty in emulsification, poor storage stability, and the need to heat before use. SBR latex-modified emulsified asphalt has high-temperature non-stick wheel characteristics, and its low-temperature flexibility is better than the previous two, and the sticky layer is not prone to cracking, but it has problems such as poor storage stability, high emulsion viscosity, and difficulty in spreading.

[0003] Patent CN113025066A discloses an epoxy resin type non-stick wheel emulsified asphalt and its preparation method. The asphalt includes the following raw materials in parts by weight: 100 parts of base asphalt, 1-8 parts of bisphenol A epoxy resin, 0-5 parts of polyethylene wax, 0-30 parts of special asphalt, 0-10 parts of polyether polyol, 0-1 part of emulsifier, 0-0.3 parts of thickener, 0-0.5 parts of hydrochloric acid, 0-0.3 parts of auxiliary agent, and 100 parts of water. Polyethylene wax is used to reduce the viscosity of epoxy modified asphalt to 0-0.3Mpa, which significantly improves the PG grade of the evaporation residue of the emulsified asphalt and the bonding force at 60°C, and has increased industrial utilization value.

[0004] Patent CN116178975A discloses a method for preparing hydrogenated epoxy resin modified emulsified asphalt. First, a cationic slow-cracking and slow-setting emulsifier is used to emulsify 70# road petroleum asphalt, and a hydrogenated epoxy system is added to the emulsified asphalt and stirred to obtain a new epoxy resin material modified emulsified asphalt. Since hydrogenated epoxy resin has saturated cyclohexane, the more stable hydrogen bonds in it can provide good weather resistance, UV resistance and other properties, and its cured product has good mechanical properties. Therefore, hydrogenated epoxy resin is used to modify emulsified asphalt, thereby improving the applicability of emulsified asphalt for cold regeneration of asphalt pavement, so that the cold regenerated mixture has better high temperature performance and low temperature toughness is also improved. Summary of the invention

[0005] Aiming at a series of problems in the prior art, such as poor long-term road performance of conventional modified emulsified asphalt, great difficulty in emulsification of special modified emulsified asphalt, and poor storage stability, the present application proposes a copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer and a preparation method thereof. The copolymerized epoxy modified emulsified asphalt tack layer has both high and low temperature characteristics, a high softening point, no wheel sticking at high temperature, good flexibility at low temperature, crack resistance, strong adhesion to the base surface, impermeability and water resistance, and the high molecular linear polyether polyol makes the modified asphalt have excellent hydrophilicity, can realize self-emulsification, is easy to produce, and is stable in storage.

[0006] A copolymerized epoxy modified emulsified asphalt material for an asphalt pavement tack layer, wherein the copolymerized epoxy modified emulsified asphalt material is obtained by mixing modified asphalt and water and then subjecting the mixture to high-speed shearing;

[0007] The ratio of the modified asphalt to water is 1:(1-1.2);

[0008] The modified asphalt comprises the following raw materials in parts by weight: 100 parts of base asphalt, 20 parts of oxidant, 1-2 parts of phosphoric acid, 120-240 parts of polyether polyol, 0.6-2 parts of hydrogen, 4-7 parts of metal catalyst, 8-24 parts of isocyanate, 2-3.2 parts of organic metal catalyst and 20-48 parts of epoxy resin.

[0009] The matrix asphalt is a high-grade asphalt with a grade greater than 50. Preferably, the matrix asphalt is any one of Jinling 70# matrix asphalt, Shuanglong 70# matrix asphalt, and Shuanglong 90# matrix asphalt.

[0010] The above-mentioned oxidant is an acidic peroxide. Preferably, the oxidant is any one of m-chloroperbenzoic acid, peracetic acid, and hydrogen peroxide. The acidic peroxide introduces epoxy groups into the molecular structure of the matrix asphalt, which is convenient for subsequent grafting of polyether polyols through esterification reaction to modify the hydrophilicity and flexibility of the asphalt.

[0011] The above-mentioned polyether polyol is a linear polyether polyol, and has a functionality of 2 and a molecular weight of ≥2000. Preferably, the polyether polyol is any one of polypropylene glycol (PPG), polytetramethylene glycol, and tetramethylene glycol-propylene oxide copolymer. Grafting a large molecular weight long-chain linear polyether polyol can greatly improve the flexibility and hydrophilicity of the modified asphalt, reduce the difficulty of emulsification of the modified asphalt, and realize the self-emulsification of the modified asphalt. The linear straight-chain polyether polyol with a functionality of 2 has excellent flexibility and deformation rate. After modifying the asphalt with it, it is not easy to form a three-dimensional network structure, and the flexibility will not cause a significant increase in viscosity.

[0012] The hydrogen is industrial hydrogen with a purity of ≥99.99%. The hydrogenation reaction reduces the double bonds, benzene rings and cycloalkanes in the asphalt, reduces the unsaturation of the modified asphalt, reduces the effects of oxygen and ultraviolet rays on the asphalt, and improves the weather resistance of the asphalt. The amount of hydrogen used is calculated based on the unsaturation of the asphalt, but the production process is to maintain a constant pressure of hydrogen. The H / C ratio of asphalt is generally around 1.4, and the calculated unsaturation = (2*1+1.4-x) / 2, but the main proportion in the asphalt system is carbon atoms and hydrogen atoms, so x can be 0, so the unsaturation of the asphalt is 1.7, so 1.7 mol of hydrogen is used for 1 mol of asphalt. The molar mass of common asphalt is 200-1000g / mol, so the theoretical amount of hydrogen used is 0.17-1 part of hydrogen for 1 part of asphalt. To ensure the effective progress of the production process, this application uses 0.6-2 parts of hydrogen.

[0013] The above-mentioned metal catalyst is a nickel-based or aluminum-based metal catalyst; preferably, the metal catalyst is any one of Ni / C and Ni / Al2O3.

[0014] The organometallic catalyst is an organotin or organomercury type organometallic catalyst.

[0015] The above isocyanate is one of diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), and isophorone diisocyanate (IPDI). It reacts with polyether polyol to produce polyurethane groups, improves the toughness and weather resistance of asphalt, and can be further grafted with epoxy resin.

[0016] The epoxy resin is bisphenol A epoxy resin. Preferably, the epoxy resin is any one of E44, E51, and E20. The grafted epoxy resin can greatly improve the cohesive strength of asphalt and the bonding strength to the base surface, prevent the adhesive layer from being broken, and resist seepage and water.

[0017] A method for preparing a copolymerized epoxy modified emulsified asphalt material for an asphalt pavement tack layer is characterized in that it comprises the following steps: (1) adding n-hexane to a reactor, heating the asphalt to 150-180° C. and pouring it into the reactor, stirring evenly, cooling to 30-40° C., adding an oxidant, reacting at a constant temperature for 5-6 hours, then heating to 80-90° C., adding a polyether polyol, and adding phosphoric acid to react for 4-5 hours to obtain a modified asphalt containing a hydrophilic long chain; (2) heating the modified asphalt containing a hydrophilic long chain to 80-90° C., adding Add a metal catalyst, introduce hydrogen for circulation, and react at constant pressure and temperature for 3-4 hours to obtain hydrogenated modified asphalt; (3) Add isocyanate and organic metal catalyst to the hydrogenated modified asphalt, react at constant temperature for 4-5 hours, and then add bisphenol A type epoxy resin, and react at constant temperature for 4-5 hours; (4) Distill off n-hexane and cool to room temperature to obtain modified asphalt; (5) Heat the modified asphalt to 150-160°C, pour it into the reactor together with 60°C water, and shear at high speed for 15-20 minutes to obtain copolymerized epoxy modified emulsified asphalt.

[0018] The above shearing speed is 1000-1200 rpm.

[0019] Compared with the prior art, this application has the following advantages:

[0020] (1) The base asphalt is grafted with high molecular weight long-chain linear polyether polyols, which can greatly improve the flexibility of the adhesive layer and effectively prevent the adhesive layer from becoming brittle and cracking during service, thus achieving the effect of waterproofing and anti-seepage. At the same time, the long-chain polyether polyols, as hydrophilic groups, can effectively reduce the difficulty of emulsification of modified asphalt and realize self-emulsification of asphalt. The high-speed shearing in the reactor can completely prepare the emulsified asphalt, and the emulsified asphalt system is stable and can be stored for a long time.

[0021] (2) The unsaturation of modified asphalt is reduced through hydrogenation reaction, and the benzene ring and the remaining double bonds are reduced to alkane bonds with higher bond energy, thereby reducing the influence of external environmental factors such as water, oxygen, high and low temperatures, improving the weather resistance of asphalt, and extending the service life of the adhesive layer;

[0022] (3) Grafting epoxy resin onto modified asphalt molecules can effectively improve the cohesive strength and modulus of modified asphalt, which is much higher than the tensile strength of 0.8 MPa of conventional emulsified asphalt, thereby extending the service life; at the same time, epoxy resin can effectively improve the bonding strength to the asphalt base surface, thereby reducing the risk of road pavement displacement damage. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The sources of various raw materials used in this application are shown in Table 1 below:

[0025] Table 1

[0026]

[0027]

[0028] Example 1

[0029] Example 1 provides a copolymerized epoxy modified emulsified asphalt, the raw materials of which include the following components: Jinling 70# asphalt, meta-chloroperbenzoic acid, n-hexane, PTMG3000, phosphoric acid, Ni / Al2O3, industrial hydrogen, MDI, catalyst T9, epoxy resin E51, and water.

[0030] A method for preparing copolymerized epoxy modified emulsified asphalt comprises the following steps:

[0031] S1: Add 100 parts of n-hexane to the reactor, heat 100 parts of Jinling 70# asphalt to 150°C and pour into the reactor, stir evenly, cool to 35°C, add 20 parts of m-chloroperbenzoic acid, react at constant temperature for 5 hours, then heat to 80°C, add 180 parts of PTMG3000, add 2 parts of phosphoric acid and react for 4 hours to obtain modified asphalt containing hydrophilic long chains;

[0032] S2 heats the modified asphalt containing hydrophilic long chains to 85°C, adds 6 parts of Ni / Al2O3, introduces industrial hydrogen for circulation, and reacts at a constant temperature for 4 hours to obtain hydrogenated modified asphalt.

[0033] S3: Add 15 parts of MDI and 2.8 parts of organometallic catalyst T9 to hydrogenated modified asphalt, react at constant temperature for 4 hours, then add 30 parts of E51, and react at constant temperature for 4 hours;

[0034] S4 distills to remove n-hexane and cools to room temperature to obtain modified asphalt;

[0035] S5: Heat 100 parts of modified asphalt to 160°C, pour it into the reactor together with 100 parts of 60°C water, and shear at high speed for 20 minutes to obtain copolymerized epoxy modified emulsified asphalt.

[0036] Example 2

[0037] Example 2 provides a copolymerized epoxy modified emulsified asphalt, the raw materials of which include the following components: Shuanglong 70# asphalt, meta-chloroperbenzoic acid, n-hexane, PTMG3000, phosphoric acid, Ni / C, industrial hydrogen, MDI, catalyst neodecanoate phenylmercuric, epoxy resin E51, and water.

[0038] A method for preparing copolymerized epoxy modified emulsified asphalt comprises the following steps:

[0039] S1: Add 100 parts of n-hexane to the reactor, heat 100 parts of Shuanglong 70# asphalt to 150℃ and pour into the reactor, stir evenly, cool to 35℃, add 20 parts of m-chloroperbenzoic acid, react at constant temperature for 5h, then heat to 80℃, add 120 parts of PTMG3000, add 2 parts of phosphoric acid and react for 4h to obtain modified asphalt containing hydrophilic long chains;

[0040] S2 heats the modified asphalt containing hydrophilic long chains to 85°C, adds 5 parts of Ni / C, introduces industrial hydrogen for circulation, and reacts at a constant temperature for 4 hours to obtain hydrogenated modified asphalt.

[0041] S3: Add 8 parts of MDI and 3 parts of organic metal catalyst phenylmercuric neodecanoate to hydrogenated modified asphalt, and react at constant temperature for 4 hours, then add 20 parts of E51 and react at constant temperature for 4 hours;

[0042] S4 distills to remove n-hexane and cools to room temperature to obtain modified asphalt;

[0043] S5: Heat 100 parts of modified asphalt to 160°C, pour it into the reactor together with 110 parts of 60°C water, and shear at high speed for 20 minutes to obtain copolymerized epoxy modified emulsified asphalt.

[0044] Example 3

[0045] Example 3 provides a copolymerized epoxy modified emulsified asphalt, the raw materials of which include the following components: Shuanglong 70# asphalt, meta-chloroperbenzoic acid, n-hexane, PTMG3000, phosphoric acid, Ni / C, industrial hydrogen, MDI, catalyst neodecanoate phenylmercuric, epoxy resin E51, and water.

[0046] A method for preparing copolymerized epoxy modified emulsified asphalt comprises the following steps:

[0047] S1: Add 100 parts of n-hexane to the reactor, heat 100 parts of Shuanglong 70# asphalt to 150°C and pour into the reactor, stir evenly, cool to 35°C, add 20 parts of m-chloroperbenzoic acid, react at constant temperature for 5 hours, then heat to 80°C, add 150 parts of PTMG3000, add 2 parts of phosphoric acid and react for 4 hours to obtain modified asphalt containing hydrophilic long chains;

[0048] S2 heats the modified asphalt containing hydrophilic long chains to 85°C, adds 4 parts of Ni / C, introduces industrial hydrogen for circulation, and reacts at a constant temperature for 4 hours to obtain hydrogenated modified asphalt.

[0049] S3: Add 12 parts of MDI and 2 parts of organic metal catalyst phenylmercuric neodecanoate to hydrogenated modified asphalt, and react at constant temperature for 4 hours, then add 25 parts of E51 and react at constant temperature for 4 hours;

[0050] S4 distills to remove n-hexane and cools to room temperature to obtain modified asphalt;

[0051] S5: Heat 100 parts of modified asphalt to 160°C, pour it into the reactor together with 120 parts of 60°C water, and shear at high speed for 20 minutes to obtain copolymerized epoxy modified emulsified asphalt.

[0052] Example 4

[0053] Example 4 provides a copolymerized epoxy modified emulsified asphalt, the raw materials of which include the following components: Jinling 70# asphalt, meta-chloroperbenzoic acid, n-hexane, PPG2000, phosphoric acid, Ni / Al2O3, industrial hydrogen, TDI, catalyst T9, epoxy resin E44, and water.

[0054] A method for preparing copolymerized epoxy modified emulsified asphalt comprises the following steps:

[0055] S1: Add 100 parts of n-hexane to the reactor, heat 100 parts of Jinling 70# asphalt to 150°C and pour into the reactor, stir evenly, cool to 35°C, add 20 parts of m-chloroperbenzoic acid, react at constant temperature for 5 hours, then heat to 80°C, add 220 parts of PPG2000, add 2 parts of phosphoric acid and react for 4 hours to obtain modified asphalt containing hydrophilic long chains;

[0056] S2 heats the modified asphalt containing hydrophilic long chains to 85°C, adds 7 parts of Ni / Al2O3, introduces industrial hydrogen for circulation, and reacts at a constant temperature for 4 hours to obtain hydrogenated modified asphalt.

[0057] S3: Add 20 parts of TDI and 3.2 parts of organometallic catalyst T9 to the hydrogenated modified asphalt, react at constant temperature for 4 hours, then add 38 parts of E44, and react at constant temperature for 4 hours;

[0058] S4 distills to remove n-hexane and cools to room temperature to obtain modified asphalt;

[0059] S5: Heat 100 parts of modified asphalt to 160°C, pour it into the reactor together with 115 parts of 60°C water, and shear at high speed for 20 minutes to obtain copolymerized epoxy modified emulsified asphalt.

[0060] Example 5

[0061] Example 5 provides a copolymerized epoxy modified emulsified asphalt, the raw materials of which include the following components: Jinling 70# asphalt, meta-chloroperbenzoic acid, n-hexane, PPG2000, phosphoric acid, Ni / Al2O3, industrial hydrogen, TDI, catalyst T9, epoxy resin E44, and water.

[0062] A method for preparing copolymerized epoxy modified emulsified asphalt comprises the following steps:

[0063] S1: Add 100 parts of n-hexane to the reactor, heat 100 parts of Jinling 70# asphalt to 150°C and pour into the reactor, stir evenly, cool to 35°C, add 20 parts of m-chloroperbenzoic acid, react at constant temperature for 5 hours, then heat to 80°C, add 240 parts of PPG2000, add 2 parts of phosphoric acid and react for 4 hours to obtain modified asphalt containing hydrophilic long chains;

[0064] S2 heats the modified asphalt containing hydrophilic long chains to 85°C, adds 5.5 parts of Ni / Al2O3, introduces industrial hydrogen for circulation, and reacts at a constant temperature for 4 hours to obtain hydrogenated modified asphalt.

[0065] S3: Add 24 parts of TDI and 2.5 parts of organometallic catalyst T9 to the hydrogenated modified asphalt, react at constant temperature for 4 hours, then add 48 parts of E44, and react at constant temperature for 4 hours;

[0066] S4 distills to remove n-hexane and cools to room temperature to obtain modified asphalt;

[0067] S5: Heat 100 parts of modified asphalt to 160°C, pour it into the reactor together with 105 parts of 60°C water, and shear at high speed for 20 minutes to obtain copolymerized epoxy modified emulsified asphalt.

[0068] Comparative Example 1

[0069] The difference between Comparative Example 1 and Example 1 is that the raw material of the modified asphalt in Comparative Example 1 does not contain the long-chain polyether polyol PTMG3000.

[0070] Comparative Example 2

[0071] The difference between Comparative Example 2 and Example 1 is that the raw material of the modified asphalt in Comparative Example 2 is not hydrogenated.

[0072] Comparative Example 3

[0073] The difference between Comparative Example 3 and Example 1 is that the raw material of the modified asphalt in Comparative Example 3 does not contain epoxy resin E51.

[0074] Comparative Example 4

[0075] Cationic emulsified asphalt is used.

[0076] Comparative Example 5

[0077] Use SBR latex modified emulsified asphalt.

[0078] Comparative Example 6

[0079] Use non-stick wheels with emulsified asphalt.

[0080] Test Example 1: Performance Test:

[0081] The specific test items and test standards are as follows: emulsion particle size refers to GB / T 19077-2016; tensile strength and elongation at break refer to GB / T_1040.1-2018; asphalt aging refers to JTG / E20-2011; adhesion test method refers to GB / T16777-2008.

[0082] The specific test results are shown in Table 2:

[0083] Table 2

[0084]

[0085]

[0086] Compared with the comparative example 1 which is not grafted with long-chain polyether polyol, the long-chain polyether polyol is grafted on the asphalt molecular chain in the examples 1-5, and the hydrophilic property is significantly enhanced. The comparative example 1 cannot be emulsified and cannot be made into emulsified asphalt, while the examples 1-5 can relatively simply produce emulsified asphalt with strong storage stability through mechanical high-speed shearing.

[0087] Compared with the comparative example 2 without hydrogenation, the hydrogenation reaction of Examples 1-5 reduces the unsaturation of the modified asphalt, and the benzene ring and the remaining double bonds are reduced to alkane bonds with higher bond energy, thereby reducing the effect of aging on the asphalt performance, improving the weather resistance of the asphalt, and extending the service life of the adhesive layer.

[0088] Compared with the ungrafted epoxy resin in Comparative Example 3, Examples 1-5 grafted epoxy resin on the asphalt molecules to effectively improve the tensile strength of the modified asphalt on the one hand, thereby increasing the service life of the road surface, and on the other hand, improve the adhesion to the road surface, thereby reducing the risk of road pavement displacement damage.

[0089] Compared with comparative example 4 using cationic emulsified asphalt, comparative example 5 using SBR latex modified emulsified asphalt, and comparative example 6 using non-stick wheel modified emulsified asphalt, embodiments 1-5 have great advantages in all aspects of performance; compared with comparative examples 4-6, the emulsified production of embodiments 1-5 is more convenient; compared with comparative examples 4-6, embodiments 1-5 have stronger storage stability.

[0090] The amount of polyether polyol, epoxy resin, hydrogen and each component in the present application is controlled within the above range, which helps to achieve self-emulsification of asphalt, improve the weather resistance of asphalt, extend the service life of the tack layer; improve the bonding strength to the asphalt base surface, thereby reducing the risk of shifting diseases in road pavement.

[0091] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer, characterized in that: The copolymerized epoxy modified emulsified asphalt material is obtained by mixing modified asphalt and water and then shearing at high speed; The weight ratio of the modified asphalt to water is 1:(1-1.2); The modified asphalt comprises the following raw materials in parts by weight: 100 parts of base asphalt, 20 parts of oxidant, 1-2 parts of phosphoric acid, 120-240 parts of polyether polyol, 0.6-2 parts of hydrogen, 4-7 parts of metal catalyst, 8-24 parts of isocyanate, 2-3.2 parts of organic metal catalyst and 20-48 parts of epoxy resin.

2. The copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer according to claim 1, characterized in that: The matrix asphalt is a high-grade asphalt with a grade of >50.

3. The copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer according to claim 1, characterized in that: The oxidizing agent is an acidic peroxide.

4. The copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer according to claim 1, characterized in that: The polyether polyol is a linear polyether polyol with a functionality of 2 and a molecular weight of ≥2000.

5. The copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer according to claim 1, characterized in that: The metal catalyst is a nickel-based or aluminum-based metal catalyst.

6. The copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer according to claim 1, characterized in that: The organic metal catalyst is an organic tin or organic mercury organic metal catalyst.

7. The copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer according to claim 1, characterized in that: The isocyanate is one of diphenylmethane diisocyanate, toluene (TDI) and isophorone diisocyanate.

8. The copolymerized epoxy modified emulsified asphalt material for asphalt pavement tack layer according to claim 1, characterized in that: The epoxy resin is bisphenol A type epoxy resin.

9. The method for preparing a copolymerized epoxy-modified emulsified asphalt material for asphalt pavement tack layer according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: (1) adding n-hexane to a reaction kettle, heating the asphalt to 150-180° C., pouring the asphalt into the reaction kettle, stirring evenly, cooling the temperature to 30-40° C., adding an oxidant, reacting at a constant temperature for 5-6 hours, then heating the temperature to 80-90° C., adding a polyether polyol, and adding phosphoric acid to react for 4-5 hours to obtain a modified asphalt containing a hydrophilic long chain; (2) heating the modified asphalt containing a hydrophilic long chain to 80-90° C., adding a metal catalyst, introducing hydrogen for circulation, and reacting at a constant pressure and temperature for 3-4 hours to obtain a hydrogenated modified asphalt; (3) Add isocyanate and organic metal catalyst to hydrogenated modified asphalt, react at a constant temperature for 4-5 hours, then add bisphenol A epoxy resin and react at a constant temperature for 4-5 hours; (4) Distill off n-hexane and cool to room temperature to obtain modified asphalt; (5) Heat the modified asphalt to 150-160°C, pour it into a reactor together with water, and high-speed shear for 15-20 minutes to obtain copolymerized epoxy modified emulsified asphalt.

10. The preparation method according to claim 9, characterized in that: In step (5), the water temperature is 50-60° C. and the shear speed is 1000-1200 rpm.

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