Preparation method of high-viscosity non-emulsification reaction type tack coat oil

Abstract

The invention relates to the technical field of pavement construction materials, in particular to a preparation method of high-viscosity non-emulsified reactive tack coat oil, which comprises the following steps: S1, placing matrix asphalt in a reactor, dehydrating under reduced pressure in a nitrogen atmosphere to obtain pretreated matrix asphalt, mixing epoxy resin and a polymer carrier, heating, and dispersing at a high speed to obtain slurry; and S2, adding the slurry into the pretreated matrix asphalt, heating and stirring, adding a silane coupling agent and bentonite, stirring in a nitrogen atmosphere, adding a curing agent, shearing, cooling the system, curing at a constant temperature, and filtering to obtain the high-viscosity non-emulsified reactive tack coat oil. The polymer carrier plays an important role in stabilizing the system and enhancing the bonding performance in the tack coat oil system, and the tack coat oil with good heat storage stability and high bonding strength can be prepared by reasonably adjusting the preparation conditions and the dosage of the polymer carrier.

Description

Technical Field

[0001] The invention relates to the technical field of road construction materials, and in particular to a method for preparing a high-viscosity non-emulsified reaction type tack coat oil. Background Art

[0002] In road construction, a tack coat is a functional layer laid between pavement structural layers, providing a crucial bonding effect. Its primary function is to enhance the adhesion between adjacent layers. Specifically, it is applied at the interface between asphalt layers, or between asphalt layers and cement concrete slabs / asphalt-stabilized macadam bases, thereby improving the overall structural integrity of the multi-layer pavement system. The core function of tack coat oil is to effectively bond the various surface layers, as well as the surface layer and the structure, into a continuous and stable whole. This effectively prevents interlayer slippage or delamination between the upper and lower layers (whether between asphalt structural layers or between asphalt layers and cement concrete structures). The use of tack coat oil effectively reduces pavement damage caused by poor interlayer bonding, thereby extending the service life of the pavement. Furthermore, it can penetrate and fill minor cracks and voids in the base surface, helping to improve pavement smoothness and skid resistance, ultimately enhancing driving comfort and safety. Tack coat oil is typically composed of materials with excellent adhesion and permeability, such as liquid petroleum asphalt, emulsified asphalt, and coal tar, ensuring a tight bond with the pavement material and forming a strong bond.

[0003] In the prior art, existing tack coat materials are insufficient in terms of shear and tensile strength, making it difficult to meet the needs of complex road conditions and heavy traffic. Insufficient interlayer bonding may cause road surface defects such as slippage and rutting, affecting the integrity and stability of the road surface. At the same time, some tack coat oils have defects in their resistance to water damage, and long-term water immersion may cause the tack coat to fail. In rainy areas or humid environments, the insufficient water resistance of the tack coat oil will aggravate road surface damage and shorten the service life of the road surface. In addition, the tack coat oil is prone to fatigue damage under long-term traffic loads, resulting in a decrease in the performance of the tack coat. Insufficient fatigue resistance will affect the long-term use of the road surface and increase maintenance costs. Summary of the Invention

[0004] In order to solve the problems mentioned in the above background technology, the present invention provides a method for preparing a high-viscosity non-emulsified reaction-type tack layer oil.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for preparing a high-viscosity non-emulsified reactive tack coat oil comprises the following steps:

[0007] S1. Place the base asphalt in a reactor, dehydrate under reduced pressure for 1-2 hours under a nitrogen atmosphere, cool to 120°C for standby use to obtain a pretreated base asphalt, mix the epoxy resin and the polymer carrier, heat up, and disperse at high speed for 30-40 minutes to obtain a slurry;

[0008] S2. Add the slurry to the pretreated matrix asphalt, heat and stir for 10-20 minutes, add silane coupling agent and bentonite, stir for 50-60 minutes under nitrogen atmosphere, add curing agent, shear for 10-20 minutes, cool the system, mature at a constant temperature for 30-40 minutes, filter through a 200-mesh sieve, transfer to a closed storage tank, keep warm at 80°C for use, and obtain a high-viscosity non-emulsified reactive tack coat oil.

[0009] Furthermore, the mass ratio of the matrix asphalt, epoxy resin, polymer carrier, silane coupling agent, bentonite and curing agent is (138-148): (30-35): (10-12): (0.3-0.5): (0.5-1): (9-11).

[0010] Furthermore, the epoxy resin includes one of bisphenol A epoxy resin or bisphenol F epoxy resin, the silane coupling agent includes one or more of silane coupling agent KH-550, silane coupling agent KH-560, silane coupling agent KH-602 and silane coupling agent KH-590, and the curing agent includes one of polyamide curing agent 650 or polyamide curing agent 651.

[0011] Furthermore, the polymer carrier in step S1 is prepared by the following steps:

[0012] Under nitrogen protection, octene and 1,3-butanediol dimethacrylate were added to a reactor pre-charged with N-methylpyrrolidone and stirred for 20-30 minutes. Azobisisobutyronitrile and dodecanethiol were added, and the temperature was raised and stirred to react for 7-10 hours. After the reaction was completed, the mixture was cooled to room temperature, and the white precipitate was collected by centrifugation. The mixture was washed alternately with ethanol and deionized water for three times, and dried at 60°C to constant weight to obtain a polymer carrier.

[0013] Furthermore, the temperature during the reduced pressure dehydration in step S1 is 145-155° C., and the vacuum degree is (-0.08)-(-0.10) MPa.

[0014] Furthermore, the temperature in step S1 is raised to 80-85° C., and the speed of high-speed dispersion is 1000-2000 rpm.

[0015] Furthermore, in step S2, the temperature for heating and stirring is 120-130° C., the stirring speed is 800-900 rpm, and the stirring speed after adding the silane coupling agent and bentonite is 300-400 rpm.

[0016] Furthermore, in step S2, the shearing speed is 2000-3000 rpm, and the constant temperature aging temperature is 90-95°C.

[0017] Furthermore, the mass ratio of octene, 1,3-butanediol dimethacrylate, N-methylpyrrolidone, azobisisobutyronitrile and dodecanethiol is (80-88): (20-25): (240-280): (0.8-1): (1.5-1.7).

[0018] Furthermore, the heating temperature is 70-75° C. and the stirring speed is 100-200 rpm.

[0019] Beneficial effects of the present invention:

[0020] 1. In the technical solution of the present invention, the polymer carrier is formed by free radical copolymerization of octene hydrophobic segments and 1,3-butanediol dimethacrylate polar segments, forming a highly cross-linked three-dimensional network structure. Precise control of dodecanethiol as a chain transfer agent ensures a moderate cross-linking density, avoiding the formation of an insoluble monolithic gel. Instead, it generates microgel particles with internal pores, endowing the carrier with extremely high physical stability, significant internal specific surface area, and abundant internal space. When mixed with the epoxy resin in step S1, the carrier can effectively accommodate and anchor the epoxy resin molecules through the capillary force of the pores and the dipole-dipole interaction between the surface polar ester groups and the epoxy groups / hydroxyl groups, forming a uniform and stable slurry without phase separation or epoxy resin aggregation. This ensures the high dispersion and storage stability of the epoxy resin before its introduction into the asphalt system.

[0021] 2. In the technical solution of the present invention, when the polymer carrier slurry loaded with epoxy resin is added to high-temperature asphalt (step S2), the carrier relies on its hydrophobic octene chain segment to establish good initial compatibility with the asphalt matrix, avoiding the instantaneous influx of a large amount of epoxy resin into the asphalt phase, resulting in excessive local concentration and potential oil droplet aggregation, promoting the uniform dispersion of the epoxy resin in time and space throughout the asphalt phase, improving the uniformity of curing, and avoiding the generation of internal stress concentration and mechanical defects.

[0022] 3. In the technical solution of the present invention, the polymer carrier has an amphiphilic structure, and its hydrophobic octene chain segments are deeply embedded in the asphalt hydrocarbon matrix. The epoxy resin adsorbed on the surface or in the internal pores forms a good affinity with the cured epoxy phase or the surface modified by the silane coupling agent, significantly reducing the interfacial tension between the asphalt (non-polar) and the epoxy cured phase (polar), thereby enhancing the compatibility and interfacial bonding strength between the two. In addition, the cross-linked network structure of the polymer carrier itself is not an inert filler. It can form physical entanglements and possible secondary interactions with the final epoxy cured network, forming a structure similar to an interpenetrating polymer network or nanocomposite reinforcement, which together improves the overall mechanical properties of the tack coat oil.

[0023] 4. In the technical solution of the present invention, the polymer carrier effectively isolates and restrains the epoxy resin, avoiding premature polymerization or unnecessary chemical reactions of the epoxy resin during storage or transportation, making the tack coat oil storage stable and non-emulsifying, thereby ensuring its reliability in long-term use. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] Preparation Example 1

[0026] The polymer carrier is prepared by the following steps:

[0027] Under nitrogen protection, 80 g of octene and 20 g of 1,3-butanediol dimethacrylate were added to a reactor pre-charged with 240 g of N-methylpyrrolidone, and the mixture was stirred at 100 rpm for 20 min. 0.8 g of azobisisobutyronitrile and 1.5 g of dodecanethiol were added, the temperature was raised to 70°C, and the reaction was stirred at 100 rpm for 7 h. After the reaction was completed, the mixture was cooled to room temperature, and the white precipitate was collected by centrifugation. The mixture was washed alternately with ethanol and deionized water for 3 times, and dried at 60°C to constant weight to obtain a polymer carrier.

[0028] Preparation Example 2

[0029] The polymer carrier is prepared by the following steps:

[0030] Under nitrogen protection, 85 g of octene and 23 g of 1,3-butanediol dimethacrylate were added to a reactor pre-charged with 268 g of N-methylpyrrolidone, and the mixture was stirred at 150 rpm for 25 min. 0.9 g of azobisisobutyronitrile and 1.6 g of dodecanethiol were added, the temperature was raised to 72 ° C, and the reaction was stirred at 150 rpm for 8 h. After the reaction was completed, the mixture was cooled to room temperature, and the white precipitate was collected by centrifugation. It was washed alternately with ethanol and deionized water for 3 times, and dried at 60 ° C to constant weight to obtain a polymer carrier.

[0031] Preparation Example 3

[0032] The polymer carrier is prepared by the following steps:

[0033] Under nitrogen protection, 88 g of octene and 25 g of 1,3-butanediol dimethacrylate were added to a reactor pre-charged with 280 g of N-methylpyrrolidone, and the mixture was stirred at 200 rpm for 30 min. 1 g of azobisisobutyronitrile and 1.7 g of dodecanethiol were added, the temperature was raised to 75°C, and the reaction was stirred at 200 rpm for 10 h. After the reaction was completed, the mixture was cooled to room temperature, and the white precipitate was collected by centrifugation. The mixture was washed alternately with ethanol and deionized water for 3 times, and dried at 60°C to constant weight to obtain a polymer carrier.

[0034] Example 1

[0035] A method for preparing a high-viscosity non-emulsified reactive tack coat oil comprises the following steps:

[0036] S1. Place 138 g of base asphalt in a reactor, dehydrate under reduced pressure at 145° C. for 1 h under a nitrogen atmosphere with a vacuum degree of -0.08 MPa, and cool to 120° C. for standby use to obtain a pretreated base asphalt. Mix 30 g of bisphenol A epoxy resin and 10 g of the polymer carrier obtained in Preparation Example 1, raise the temperature to 80° C., and disperse at a speed of 1000 rpm for 30 min to obtain a slurry;

[0037] S2. Add the above slurry to the pretreated matrix asphalt, heat it to 120°C, stir it at 800rpm for 10min, add 0.3g silane coupling agent KH-550 and 0.5g bentonite, stir it at 300rpm for 50min under nitrogen atmosphere, add 9g polyamide curing agent 650, shear it at 2000rpm for 10min, cool the system, mature it at a constant temperature of 90°C for 30min, filter it through a 200-mesh sieve, transfer it to a sealed storage tank, keep it warm at 80°C for standby use, and obtain a high-viscosity non-emulsified reactive tack coat oil.

[0038] Example 2

[0039] A method for preparing a high-viscosity non-emulsified reactive tack coat oil comprises the following steps:

[0040] S1. 141 g of base asphalt was placed in a reactor and dehydrated under reduced pressure at 150° C. for 1.5 h under a nitrogen atmosphere with a vacuum degree of -0.09 MPa. The mixture was cooled to 120° C. for standby use to obtain a pretreated base asphalt. 32 g of bisphenol F epoxy resin and 11 g of the polymer carrier obtained in Preparation Example 2 were mixed, heated to 82° C., and dispersed at a speed of 1500 rpm for 35 min to obtain a slurry.

[0041] S2. Add the above slurry to the pretreated matrix asphalt, heat it to 125°C, stir it at 850rpm for 15min, add 0.4g silane coupling agent KH-560 and 0.8g bentonite, stir it at 350rpm for 55min under nitrogen atmosphere, add 10g polyamide curing agent 651, shear it at 2500rpm for 15min, cool the system, mature it at a constant temperature of 92°C for 35min, filter it through a 200-mesh sieve, transfer it to a closed storage tank, keep it warm at 80°C for use, and obtain a high-viscosity non-emulsified reactive tack oil.

[0042] Example 3

[0043] A method for preparing a high-viscosity non-emulsified reactive tack coat oil comprises the following steps:

[0044] S1. Place 148 g of base asphalt in a reactor and dehydrate under reduced pressure at 155° C. for 2 h under a nitrogen atmosphere with a vacuum degree of -0.10 MPa. Cool the mixture to 120° C. for standby use to obtain a pretreated base asphalt. Mix 35 g of bisphenol A epoxy resin and 12 g of the polymer carrier obtained in Preparation Example 3. After heating to 85° C., disperse the mixture at a speed of 2000 rpm for 40 min to obtain a slurry.

[0045] S2. Add the above slurry to the pretreated matrix asphalt, heat it to 130°C, stir it at 900rpm for 20min, add 0.5g silane coupling agent KH-602 and 1g bentonite, stir it at 400rpm for 60min under nitrogen atmosphere, add 11g polyamide curing agent 650, shear it at 3000rpm for 20min, cool the system, mature it at a constant temperature of 95°C for 40min, filter it through a 200-mesh sieve, transfer it to a sealed storage tank, keep it warm at 80°C for use, and obtain a high-viscosity non-emulsified reactive tack oil.

[0046] Comparative Example 1

[0047] The difference between this comparative example and Example 1 is that octene is used instead of the polymer carrier prepared in Preparation Example 1, and the remaining steps are the same as those in Example 1.

[0048] Comparative Example 2

[0049] The difference between this comparative example and Example 2 is that 1,3-butanediol dimethacrylate is used instead of the polymer carrier prepared in Preparation Example 2, and the remaining steps are the same as those in Example 2.

[0050] Comparative Example 3

[0051] The difference between this comparative example and Example 3 is that the polymer carrier prepared in Preparation Example 3 is not added, and the remaining steps are the same as those in Example 3.

[0052] The samples prepared in Examples 1-3 and Comparative Examples 1-3 were divided into 6 30 mL glass sample bottles, 20 g ± 0.1 g per bottle, and the bottle caps were sealed for later use. Preheat the high temperature sample cell to 80 ° C, take 15 g of sample and quickly put it into the high temperature sample cell to avoid bubbles, and use a Brookfield viscometer to measure the initial viscosity. The rotor is SC4-21 and the speed is 5 rpm. After stabilization, the average value is taken and the initial viscosity value η0 is recorded. The sample bottle is placed vertically in an oven at 80 ° C, and samples are taken at 24h, 48h, 7d, and 14d. Each time, the corresponding sample bottle is taken out and cooled to room temperature. The viscosity is re-measured in the same way to measure the viscosity η t , calculate the viscosity change rate, the formula is as follows:

[0053]

[0054] The results are shown in Table 1:

[0055] Table 1. 80℃ thermal storage stability test results

[0056]

[0057] Referring to ASTM D4541 "Standard Test Method for Pull-off Strength of Coatings Using a Portable Adhesion Tester", a C40 concrete board with a size of 150 mm × 150 mm × 50 mm was used as a concrete substrate. The surface was sandblasted, cleaned, and then dried. A concrete-concrete composite test specimen was set. The tack coat oils prepared in Examples 1-3 and Comparative Examples 1-3 were applied between the two substrates at a coating amount of 0.5 kg / m 2 After preheating at 120℃ for 10 minutes, cure at 160℃ for 2 hours to ensure complete crosslinking. The specimen is then equilibrated in a 25℃ environment for 24 hours. A universal testing machine is used, equipped with a 20mm diameter aluminum pulling head. The pulling head is bonded to the center of the substrate coated with adhesive with epoxy glue. The loading rate is set to 0.7MPa / s, and the destructive force F is recorded. max , calculate the bonding strength σ t , the formula is as follows:

[0058] σ t =F max / A

[0059] Where A = 314.16 mm 2 , the results are shown in Table 2:

[0060] Table 2.25℃ pull-out bond strength test results

[0061] Group <![CDATA[Bond strength σ t (MPa)]]> Example 1 3.85 Example 2 4.12 Example 3 4.38 Comparative Example 1 1.10 Comparative Example 2 2.35 Comparative Example 3 2.95

[0062] As shown in Table 1, the initial viscosity of Examples 1-3 increases with increasing polymer carrier dosage and changing preparation conditions. During heat storage at 80°C, the viscosity increases with time, but the rate of change is relatively stable. The rate of change in viscosity gradually increases over 24 hours to 14 days, but the increase is relatively gentle. This indicates that the tackifying oils prepared in the examples have a certain degree of heat storage stability at 80°C. Although the viscosity changes, it does not show a sharp change or abnormal phenomena such as gelation, solidification, and agglomeration. The initial viscosity of Comparative Example 1 is significantly lower than that of Example 1, and the viscosity continues to decrease during heat storage at 80°C. The rate of change in viscosity is negative, and the rate of decrease gradually increases. This indicates that after replacing the polymer carrier with octene, the stability of the tackifying oil during heat storage deteriorates. This may be due to the lack of the stabilizing effect of the polymer carrier, phase separation in the system, or volatilization of components, which leads to a decrease in viscosity. The initial viscosity of Comparative Example 2 is slightly higher than that of Example 2, but gelation occurs after 48 hours, and subsequent viscosity measurement is unavailable. This indicates that replacing the polymer carrier with 1,3-butanediol dimethacrylate causes excessive crosslinking during thermal storage, leading to gelation. This suggests that this monomer alone cannot effectively stabilize the tack coat oil system. The initial viscosity of Comparative Example 3 is lower than that of Example 3. During thermal storage at 80°C, the rate of viscosity change increases in the early stages, followed by solidification and caking. This suggests that without the addition of a polymer carrier, the tack coat oil system exhibits extremely poor stability during thermal storage. This is likely due to the lack of support and stabilization provided by the polymer carrier, which leads to drastic changes in system composition and resulting in solidification and caking.

[0063] As shown in Table 2, the bond strength of Examples 1-3 increases with increasing polymer carrier dosage and varying preparation conditions, with Example 3 achieving the highest bond strength, reaching 4.38 MPa. This indicates that the addition of a polymer carrier helps improve the bond strength of the tack coat oil, likely because the polymer carrier forms a good network structure within the tack coat oil system, enhancing its interaction with the substrate. The bond strength of Comparative Example 1 is significantly lower than that of Example 1, at only 1.10 MPa. This indicates that replacing the polymer carrier with octene significantly reduces the adhesive properties of the tack coat oil, likely because octene cannot form an effective network structure within the system and provide sufficient bonding force. The bond strength of Comparative Example 2 is lower than that of Example 2, at 2.35 MPa. Although 1,3-butanediol dimethacrylate itself has a certain degree of reactivity, it is not effective in improving the bond strength of the tack coat oil when used alone, possibly because the structure it forms is not stable enough or its interaction with the substrate is weak. The bond strength of Comparative Example 3 is lower than that of Example 3, at 2.95 MPa. This indicates that when no polymer carrier is added, the bonding performance of the tack coat oil is affected, which may be due to the lack of support and reinforcement of the polymer carrier, resulting in insufficient bonding between the tack coat oil and the substrate.

[0064] In summary, the polymer carriers prepared in Preparation Examples 1-3 play an important role in stabilizing the system and enhancing the bonding performance in the adhesive layer oil system, so that the adhesive layer oils prepared in Examples 1-3 have good thermal storage stability and high bonding strength.

[0065] Throughout the specification, reference to terms such as "Preparation," "Example," or "Examples" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or preparation are included in at least one embodiment or preparation of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or preparation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or preparations.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for preparing a high-viscosity non-emulsified reactive tack coat oil, characterized in that: The following steps are involved: S1. Place the base asphalt in a reactor and dehydrate it under reduced pressure for 1-2 hours under a nitrogen atmosphere to obtain a pretreated base asphalt. Mix the epoxy resin and the polymer carrier, heat them, and disperse them at high speed for 30-40 minutes to obtain a slurry. S2. Add the slurry to the pretreated matrix asphalt, heat and stir for 10-20 minutes, add silane coupling agent and bentonite, stir for 50-60 minutes under nitrogen atmosphere, add curing agent, shear for 10-20 minutes, cool the system, mature at a constant temperature for 30-40 minutes, filter, and obtain a high-viscosity non-emulsified reactive tack oil.

2. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 1, characterized in that: The mass ratio of matrix asphalt, epoxy resin, polymer carrier, silane coupling agent, bentonite and curing agent is (138-148): (30-35): (10-12): (0.3-0.5): (0.5-1): (9-11).

3. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 1, characterized in that: The epoxy resin includes one of bisphenol A epoxy resin and bisphenol F epoxy resin, the silane coupling agent includes one or more of silane coupling agent KH-550, silane coupling agent KH-560, silane coupling agent KH-602 and silane coupling agent KH-590, and the curing agent includes one of polyamide curing agent 650 and polyamide curing agent 651.

4. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 1, characterized in that: The polymer carrier in step S1 is prepared by the following steps: Under nitrogen protection, octene and 1,3-butanediol dimethacrylate are added to a reactor pre-filled with N-methylpyrrolidone and stirred for 20-30 minutes. Azobisisobutyronitrile and dodecanethiol are added, and the temperature is raised and stirred to react for 7-10 hours. After the reaction is completed, the mixture is cooled to room temperature, the precipitate is collected by centrifugation, washed, and dried to constant weight to obtain a polymer carrier.

5. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 1, characterized in that: The temperature during the reduced pressure dehydration in step S1 is 145-155° C., and the vacuum degree is (-0.08)-(-0.10) MPa.

6. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 1, characterized in that: The temperature of the heating in step S1 is 80-85° C., and the speed of the high-speed dispersion is 1000-2000 rpm.

7. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 1, characterized in that: The temperature for heating and stirring in step S2 is 120-130° C., the stirring speed is 800-900 rpm, and the stirring speed after adding the silane coupling agent and bentonite is 300-400 rpm.

8. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 1, characterized in that: In step S2, the shearing speed is 2000-3000 rpm, and the constant temperature aging temperature is 90-95°C.

9. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 4, characterized in that: The mass ratio of octene, 1,3-butanediol dimethacrylate, N-methylpyrrolidone, azobisisobutyronitrile and dodecanethiol is (80-88): (20-25): (240-280): (0.8-1): (1.5-1.7).

10. The method for preparing a high-viscosity non-emulsified reactive tack coat oil according to claim 4, characterized in that: The heating temperature is 70-75°C and the stirring speed is 100-200 rpm.

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