An anti-shedding agent and its preparation method and application

Abstract

The present invention discloses an anti-shedding agent and a preparation method and application thereof. The anti-shedding agent comprises the following raw materials: styrene-butadiene-styrene copolymer, ethylene-vinyl acetate copolymer, resin, nitrogen-containing aromatic compound, p-phenylenediamine compound, coupling agent, hindered phenol compound, methacrylate compound. The preparation method of the anti-shedding agent comprises: uniformly mixing the above materials, and obtaining the anti-shedding agent after mixing and extrusion granulation. The anti-shedding agent of the present invention is in granular form and is used in airport asphalt. It can significantly improve the adhesion strength of asphalt, improve the anti-shedding performance, and has strong adaptability to the high-temperature wake environment of aircraft.

Description

Technical Field

[0001] The invention belongs to the fields of petroleum industry and basic material chemistry, and specifically relates to a novel anti-shedding agent and a preparation method thereof, which is particularly suitable for airport asphalt runways. Background Art

[0002] Airport runway pavement materials are divided into cement concrete and asphalt concrete. The former is more used in feeder airports, while the latter is mainly used in trunk or feeder airports to cover cement runways with asphalt concrete. China's airports with more than 10 million passenger traffic mainly use asphalt concrete materials as runway pavement materials. The working performance of asphalt concrete materials for airport runways is significantly different from that of asphalt concrete materials for ordinary roads, mainly manifested in the following two points: First, the high-temperature airflow ejected by jet aircraft seriously affects the stability of asphalt concrete materials; second, the reduction of oil content in asphalt concrete materials is prone to loosening of surface coarse aggregates to form foreign intrusion objects (FOD). Once FOD is inhaled into the aircraft engine, it will cause serious flight accidents. Therefore, improving the high-temperature stability and resistance to coarse aggregate shedding of asphalt concrete materials is an important research direction for improving the safety of civil aviation operations. At present, airport runways around the world generally use polymer-modified asphalt with good high-temperature performance for paving to cope with the problems of pavement deformation and threshing under aircraft wake baking and high shear stress, but the effect is not ideal. After a period of use, pavement bulges and cracks and aggregate shedding occur frequently, which brings huge flight safety risks and rising maintenance costs. Therefore, there is an urgent need to develop a high-temperature resistant and anti-shedding asphalt material suitable for use on airport runways, establish a high-temperature resistant and anti-shedding evaluation method specifically for airport asphalt, and form a complete set of systematic and scientific supporting technologies to meet the international and domestic demand for high-quality asphalt materials in the next two to three decades.

[0003] The problem of stone shedding on airport runways is different from that on highways. On highways, the main concern is water damage, while on airport runways, the main concern is the sweeping effect of the high-temperature wake of jet aircraft. The high temperature (850℃-900℃), large airflow, and fast airflow speed (180m / s) cause the runway surface temperature to rise rapidly, and the temperature drops after the aircraft passes. The temperature is always in frequent temperature fluctuations, which can easily cause aging, fatigue, damage, and threshing of asphalt on the pavement. At present, there is no anti-sloughing agent specifically developed to address the problem of asphalt concrete aggregate shedding caused by the high-temperature wake of jet aircraft on airport runways. Summary of the invention

[0004] In view of the aggregate shedding problem faced by airport asphalt runways, the present invention provides a novel anti-shedding agent particularly suitable for airport asphalt runways and its preparation method and application. When the anti-shedding agent of the present invention is used for airport asphalt runways, the anti-shedding performance of asphalt can be significantly improved.

[0005] The present invention provides an anti-shedding agent, which comprises the following raw materials in parts by mass:

[0006] 2 to 9 parts of styrene-butadiene-styrene copolymer,

[0007] 2-6 parts of ethylene-vinyl acetate copolymer,

[0008] Resin 5~12 parts,

[0009] 2 to 7 parts of nitrogen-containing aromatic compounds,

[0010] 1 to 4 parts of p-phenylenediamine compounds,

[0011] Coupling agent 0.1~0.5 parts,

[0012] Hindered phenol compound 0.1~0.5 parts,

[0013] 1 to 4 parts of methacrylate compound.

[0014] The anti-shedding agent of the present invention preferably comprises the following raw materials in parts by mass:

[0015] 3-8 parts of styrene-butadiene-styrene copolymer,

[0016] 2-5 parts of ethylene-vinyl acetate copolymer,

[0017] Resin 6~11 parts,

[0018] 2 to 6 parts of nitrogen-containing aromatic compounds,

[0019] 1-3 parts of p-phenylenediamine compounds,

[0020] Coupling agent 0.2~0.4 parts,

[0021] Hindered phenol compound 0.2~0.4 parts,

[0022] 1 to 3 parts of methacrylate compound.

[0023] The styrene-butadiene-styrene copolymer is linear or star-shaped, and has an average relative molecular weight of 100,000 to 260,000.

[0024] In the ethylene-vinyl acetate copolymer, the mass content of the combined vinyl acetate is 21wt%~26wt%.

[0025] The resin is one or more of petroleum resin, terpene resin, rosin resin, coumarone resin, phenolic resin, polyester resin and polyamide resin.

[0026] The nitrogen-containing aromatic compound is selected from at least one of quaternary ammonium pyridine and diaminopyrimidine hydrochloride. Among them, the quaternary ammonium pyridine can also be called azabenzene quaternary ammonium salt, selected from at least one of N-phenacyl pyridine quaternary ammonium salt, O-(7-azabenzotriazole-1-yl)-N,N,N',N'-tetramethylurea tetrafluoroborate quaternary ammonium salt, chloride N-cyanomethyl pyridine quaternary ammonium salt, N-(2-acetyl pyridine) quaternary ammonium salt, N-ethyl acetate pyridine quaternary ammonium salt, N-nitrile methyl pyridine quaternary ammonium salt, N-acetyl pyridine quaternary ammonium salt, 2-mercapto pyridine quaternary ammonium salt, N-(2-methylpropenyl) methyl pyridine quaternary ammonium salt, and brominated N-phenacyl pyridine quaternary ammonium salt. The diaminopyrimidine hydrochloride is selected from at least one of 2,5-diamino-4,6-dihydroxypyrimidine hydrochloride, 4,5-diamino-2,6-dihydroxypyrimidine hydrochloride, and 2,4-diaminopyrimidine-5-ol dihydrochloride.

[0027] The p-phenylenediamine compound is one or more of N,N'-diphenyl-p-phenylenediamine, N-cyclohexyl-N'-phenyl-p-phenylenediamine, and N-phenyl-N'-isopropyl-p-phenylenediamine.

[0028] The coupling agent is one or more of a silane coupling agent (at least one of models KH550, KH560, and KH570), an aluminate coupling agent, and a titanate coupling agent.

[0029] The hindered phenol compound includes one or more of 2,8-di-tert-butyl-4-methylphenol, pentaerythritol tetrakis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol, and 1,3,5-(3,5-di-tert-butyl-4-hydroxyphenyl)-s-triazine-2,4,6(1H,3H,5H)trione.

[0030] The methacrylate compound is one or a mixture of 2-hydroxyethyl methacrylate, 2-ethylhexyl methacrylate, and ethyl methacrylate.

[0031] The second aspect of the present invention provides a method for preparing the above-mentioned anti-shedding agent, comprising:

[0032] Styrene-butadiene-styrene copolymer, ethylene-vinyl acetate copolymer, resin, nitrogen-containing aromatic compound, p-phenylenediamine compound, coupling agent, hindered phenol compound, methacrylate compound and other materials are uniformly mixed, kneaded and granulated to obtain an anti-shedding agent.

[0033] The mixing is achieved by using a conventional mixing device, such as a kneader. The mixing conditions are as follows: the mixing temperature is 140°C to 160°C, and the mixing time is 40 to 80 minutes.

[0034] The granulation is carried out by extrusion granulation, which can be realized by conventional extrusion granulation equipment, such as a screw extruder. The extrusion granulation conditions are as follows: the extrusion granulation temperature is 140°C to 160°C.

[0035] The anti-shedding agent prepared by the method provided in the second aspect is in granular form, and the particle size can be 2 to 5 mm.

[0036] The third aspect of the present invention provides an anti-shedding asphalt, comprising: petroleum asphalt and the above-mentioned anti-shedding agent.

[0037] In the anti-shedding asphalt, the amount of the anti-shedding agent accounts for 2% to 3% of the mass of the anti-shedding asphalt.

[0038] In the anti-shedding asphalt, the petroleum asphalt can be conventional petroleum asphalt used for airport runways, which can be at least one of straight-run asphalt, oxidized asphalt, blended asphalt, solvent-deoiled asphalt, and polymer-modified asphalt.

[0039] The fourth aspect of the present invention provides a method for preparing the anti-shedding asphalt, comprising: first heating and melting petroleum asphalt, adding the anti-shedding agent, stirring until the mixture is uniformly mixed, and then developing to obtain the anti-shedding asphalt.

[0040] In the preparation method of the anti-shedding asphalt of the present invention, the asphalt is heated and melted at 140°C to 160°C, the stirring temperature at a constant temperature is 140°C to 160°C, and the stirring time can be 40 to 80 minutes. The development temperature is 140°C to 160°C, and the development time is 4 to 8 hours.

[0041] The anti-shedding agent of the present invention is particularly suitable for application in asphalt of airport runways.

[0042] The anti-shedding asphalt provided by the invention is suitable for use as airport runway asphalt.

[0043] The present invention has the following advantages:

[0044] 1. The anti-shedding agent of the present invention can not only significantly improve the anti-shedding performance of asphalt, but also has strong adaptability to the high-temperature wake environment of aircraft, can improve the anti-shedding performance of airport asphalt runways, reduce the shedding of aggregates, and reduce the incidence of flight accidents.

[0045] 2. The anti-shedding agent of the present invention is in granular form and is easy to transport and store.

[0046] 3. In the preparation method of the anti-shedding agent of the present invention, a nitrogen-containing aromatic compound is used as an initiator, and with the assistance of a coupling agent, styrene-butadiene-styrene copolymer, ethylene-vinyl acetate copolymer, resin, nitrogen-containing aromatic compound, p-phenylenediamine compound, etc. are subjected to grafting reaction in a kneader and during screw extrusion, so that each substance can be quickly and well combined, and the formed product has high viscosity and flexibility, and also has good polarity, so that the anti-shedding agent can make asphalt have better resistance to high temperature shedding performance under high temperature environment. Adding methacrylate compounds further enhances the adhesion strength between asphalt and stone. Adding hindered phenol compounds can improve the anti-aging ability of the above-mentioned unsaturated bond-containing substances, thereby improving the heat aging resistance of the anti-shedding agent and asphalt. Therefore, the anti-shedding agent of the present invention comprehensively strengthens the adhesion strength of asphalt to stone from many aspects, and improves the resistance of airport asphalt to high temperature shedding.

[0047] 4. The preparation conditions of the anti-shedding agent of the present invention are more moderate, and the mixing reaction time in the preparation process of the anti-shedding agent and the development time in the preparation process of the anti-shedding asphalt are greatly shortened, thereby improving production efficiency. DETAILED DESCRIPTION

[0048] The technical solution of the present invention is described in detail below in conjunction with the examples, but the present invention is not limited to the following examples. In the present invention, wt% is mass fraction.

[0049] In the present invention, the aircraft high temperature wake simulation test method is: using an aircraft engine (such as a replaced engine), the tail is connected to a straight cylinder of a high temperature resistant material with a heating function. During the experiment, the asphalt to be tested is melted and placed in a metal tray, and spread flat in a film shape, and the film thickness is 3mm±0.3mm. The tray with the asphalt film is placed at the bottom of the cylinder and fixed firmly. The bottom of the cylinder has a heating function to ensure that the asphalt temperature in the tray is maintained at 60℃±20℃ (simulating the road surface temperature during high temperatures in summer). Turn on the engine, so that the high temperature exhaust gas of the engine enters from one end of the straight cylinder and is discharged from the other end, so that the high temperature exhaust gas blows over the asphalt film, continues to blow for 30 minutes, stops for 10 minutes, and repeats this continuously for many times. Starting from the first blowing, an experimental cycle is 240 hours. Then take out the asphalt, analyze various properties, and compare them with the performance before the simulation experiment. In this way, the asphalt on the airport runway (especially the take-off section) is simulated when it is swept by the high temperature exhaust gas of the aircraft for a long time, and the changes in the properties of the asphalt, especially the changes in the anti-shedding performance, are investigated.

[0050] In the present invention, the asphalt adhesion strength is obtained by testing with a pull-off tester. The instrument and test method are as follows:

[0051] Instruments and equipment: Model: PosiTest AT-A pull-out tester, tester parameters: pull-out rate 150psi / s; test range 0-2000psi; test method is as follows:

[0052] Weigh 0.03g of asphalt on the test surface of the ingot; place the ingot with asphalt on the electric heating plate. After the asphalt melts, spread the asphalt evenly within 10s. At the same time, quickly transfer the preheated white steel plate to the horizontal operating table, buckle the ingot coated with asphalt on the white steel plate, and let it cool to room temperature (about 1 h). The liquid asphalt spreads evenly under the gravity of the ingot, and after cooling, the ingot and the white steel plate are bonded. The thickness of the asphalt film is about 0.1mm. The white steel plate and the ingot cooled to room temperature are placed in an environmental chamber (temperature: 20℃; relative humidity: 50Rh%) for 1h at a constant temperature, then taken out and the adhesion is tested using a PosiTest AT-A tester. The pull-out strength value when the ingot is separated from the metal plate is recorded. This value is used to characterize the anti-detachment performance of the asphalt. The larger the value, the better the anti-detachment performance.

[0053] Example 1

[0054] Weigh 21.0 kg of styrene-butadiene-styrene copolymer with an average relative molecular mass of 110,000, 21.0 kg of ethylene-vinyl acetate copolymer with a combined vinyl acetate content of 21 wt%, 51.0 kg of C5 petroleum resin, 21.0 kg of N-(2-acetylpyridinyl)pyridinium quaternary ammonium salt, 11.0 kg of N,N'-diphenyl-p-phenylenediamine, 1.1 kg of silane coupling agent (KH560), 1.1 kg of 2,8-di-tert-butyl-4-methylphenol, and 11.0 kg of 2-hydroxyethyl methacrylate, place in a preheated kneader for mixing, the mixing temperature is 142 ° C, the mixing time is 42 min; then extrusion granulation, the extrusion temperature is 142 ° C. Cut into granules with a particle size of 2 mm to obtain an anti-shedding agent. The distribution ratio of each group is shown in Table 1.

[0055] Example 2

[0056] Weigh 55.0 kg of styrene-butadiene-styrene copolymer with an average relative molecular mass of 250,000, 35.0 kg of ethylene-vinyl acetate copolymer with a combined vinyl acetate content of 26 wt%, 85.0 kg of terpene resin, 40.0 kg of N-acetylpyridinium quaternary ammonium salt, 20.0 kg of N-cyclohexyl-N'-phenyl-p-phenylenediamine, 3.0 kg of aluminate coupling agent, 3.0 kg of tetrakis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, and 20.0 kg of 2-ethylhexyl methacrylate, place in a preheated kneader for mixing, the mixing temperature is 158 ° C, the mixing time is 78 min; then extrusion granulation, the extrusion temperature is 158 ° C. Cut into granules with a particle size of 2 mm to obtain an anti-shedding agent. The distribution ratio of each group is shown in Table 1.

[0057] Example 3

[0058] Weigh 78.0 kg of styrene-butadiene-styrene copolymer with an average relative molecular mass of 200,000, 48.0 kg of ethylene-vinyl acetate copolymer with a combined vinyl acetate content of 24 wt%, 100.0 kg of polyamide resin, 58.0 kg of 4,5-diamino-2,6-dihydroxypyrimidine hydrochloride, 28.0 kg of N-phenyl-N'-isopropyl-p-phenylenediamine, 3.8 kg of titanate coupling agent, 3.8 kg of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl alcohol, and 28.0 kg of ethyl methacrylate, place in a preheated kneader for mixing, the mixing temperature is 150 ° C, the mixing time is 60 min; then extrusion granulation, the extrusion temperature is 150 ° C. Cut into granules with a particle size of 2 mm to obtain an anti-shedding agent. The distribution ratio of each group is shown in Table 1.

[0059] Example 4

[0060] The anti-shedding agent obtained in Example 1 was added to molten petroleum asphalt (Qilu 70) with a needle penetration of 70 dmm at 25°C produced by Qilu Petrochemical Company, and the weight ratio of petroleum asphalt to anti-shedding agent was 97:3. Constant temperature stirring was performed at 142°C for 42 minutes, and then development was performed at a constant temperature development temperature of 142°C for 4 hours to obtain anti-shedding asphalt.

[0061] The adhesion strength of the anti-shedding asphalt was tested by a pull-out tester, and the results are shown in Table 2. The anti-shedding asphalt was subjected to a simulation experiment in a high-temperature wake environment of an aircraft, and a pull-out test was performed again after one cycle of the test, and the results are shown in Table 2.

[0062] Example 5

[0063] The anti-shedding agent obtained in Example 2 was added to molten petroleum asphalt (Qilu 70) with a needle penetration of 70 dmm at 25°C produced by Qilu Petrochemical Company, and the weight ratio of petroleum asphalt to anti-shedding agent was 97.5:2.5. Constant temperature stirring was performed at 158°C for 78 minutes, and then development was performed at a constant temperature development temperature of 158°C for 8 hours to obtain anti-shedding asphalt.

[0064] The adhesion strength of the anti-shedding asphalt was tested by a pull-out tester, and the results are shown in Table 2. The anti-shedding asphalt was subjected to a simulation experiment in a high-temperature wake environment of an aircraft, and a pull-out test was performed again after one cycle of the test, and the results are shown in Table 2.

[0065] Example 6

[0066] The anti-shedding agent obtained in Example 3 was added to molten petroleum asphalt (Qilu 70) with a needle penetration of 70 dmm at 25°C produced by Qilu Petrochemical Company, and the weight ratio of petroleum asphalt to anti-shedding agent was 98:2. Constant temperature stirring was performed at a constant temperature of 150°C for 60 minutes, and then development was performed at a constant temperature development temperature of 150°C for 6 hours to obtain anti-shedding asphalt.

[0067] The adhesion strength of the anti-shedding asphalt was tested by a pull-out tester, and the results are shown in Table 2. The anti-shedding asphalt was subjected to a simulation experiment in a high-temperature wake environment of an aircraft, and a pull-out test was performed again after one cycle of the test, and the results are shown in Table 2.

[0068] Comparative Example 1

[0069] For comparison, the adhesion strength of the 70A grade asphalt (Qilu 70) produced by Qilu Petrochemical Company tested by the pull-out tester is also listed in Table 2; the 70A grade asphalt (Qilu 70) produced by Qilu Petrochemical Company was also subjected to a simulation experiment in the high temperature wake environment of the aircraft, and after one cycle of testing, pull-out tests were performed respectively. The results are shown in Table 2.

[0070] Comparative Example 2

[0071] For comparison, the commercial granular anti-shedding agent JW-AS1 produced by Shenzhen Jiashengwei was added to the molten petroleum asphalt (Qilu 70A) with a needle penetration of 70dmm at 25℃ produced by Qilu Petrochemical Company, and the weight ratio of petroleum asphalt: anti-shedding agent was 97.5:2.5. Constant temperature stirring, constant temperature of 158℃, stirring time of 78 min, and then development, constant temperature development temperature of 158℃, development time of 8 hours, to obtain anti-shedding asphalt.

[0072] The adhesion strength of the anti-shedding asphalt was tested by a pull-out tester, and the results are shown in Table 2. The anti-shedding asphalt was subjected to a simulation experiment in a high-temperature wake environment of an aircraft, and a pull-out test was performed again after one cycle of the test, and the results are shown in Table 2.

[0073] Table 1 Preparation ratio of anti-shedding agent components

[0074] Material weight / kg Example 1 Example 2 Example 3 Styrene-butadiene-styrene copolymer 21.0 55.0 78.0 Ethylene-vinyl acetate copolymer 21.0 35.0 48.0 Resin 51.0 85.0 100.0 Nitrogen-containing aromatic compounds 21.0 40.0 58.0 p-Phenylenediamine compounds 11.0 20.0 28.0 Coupling agent 1.1 3.0 3.8 Hindered phenolic compounds 1.1 3.0 3.8 Methacrylate compounds 11.0 20.0 28.0

[0075] Table 2 Asphalt pull-out test results

[0076] Adhesion strength / psi Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 No simulation experiment was conducted 453 489 513 380 423 After the simulation experiment 478 510 531 308 433

[0077] As can be seen from Table 2, adding the anti-shedding agent of the present invention to asphalt can significantly improve the adhesion strength and anti-shedding performance of asphalt; after a cycle of aircraft high-temperature wake simulation experiment, the adhesion strength of the asphalt to which the anti-shedding agent of the present invention is added not only does not decrease, but increases, indicating that the anti-shedding agent of the present invention can not only improve the anti-shedding performance of asphalt, but also has strong adaptability to the aircraft high-temperature wake environment. However, the adhesion strength of asphalt without the anti-shedding agent decreased significantly after the simulation experiment; after adding a certain commercially available anti-shedding agent, the improvement in adhesion strength is smaller than that of the anti-shedding agent of the present invention. After the simulation experiment, although the adhesion strength did not decrease, it did not increase substantially.

Claims

1. An anti-shedding agent, comprising the following raw materials in parts by mass: 2 to 9 parts of styrene-butadiene-styrene copolymer, 2-6 parts of ethylene-vinyl acetate copolymer, Resin 5~12 parts, 2 to 7 parts of nitrogen-containing aromatic compounds, 1 to 4 parts of p-phenylenediamine compounds, Coupling agent 0.1~0.5 parts, Hindered phenol compound 0.1~0.5 parts, 1-4 parts of methacrylate compound; The resin is one or more of petroleum resin, terpene resin, rosin resin, coumarone resin, phenolic resin, polyester resin, and polyamide resin; The nitrogen-containing aromatic compound is selected from at least one of pyridinium quaternary ammonium salt and diaminopyrimidine hydrochloride; The quaternary pyridinium salt is selected from at least one of N-phenacylpyridinium quaternary ammonium salt, O-(7-azabenzotriazole-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate quaternary ammonium salt, N-cyanomethylpyridinium chloride quaternary ammonium salt, N-(2-acetylpyridinyl)pyridinium quaternary ammonium salt, N-ethyl acetate pyridinium quaternary ammonium salt, N-nitrilemethylpyridinium quaternary ammonium salt, N-acetylpyridinium quaternary ammonium salt, 2-mercaptopyridinium quaternary ammonium salt, N-(2-methylpropenyl)methylpyridinium quaternary ammonium salt, and brominated N-phenacylpyridinium quaternary ammonium salt; the diaminopyrimidine hydrochloride is selected from at least one of 2,5-diamino-4,6-dihydroxypyrimidine hydrochloride, 4,5-diamino-2,6-dihydroxypyrimidine hydrochloride, and 2,4-diaminopyrimidine-5-ol dihydrochloride.

2. The anti-shedding agent according to claim 1, Features: In parts by mass, it includes the following raw materials: 3-8 parts of styrene-butadiene-styrene copolymer, 2-5 parts of ethylene-vinyl acetate copolymer, Resin 6~11 parts, 2 to 6 parts of nitrogen-containing aromatic compounds, 1-3 parts of p-phenylenediamine compounds, Coupling agent 0.2~0.4 parts, Hindered phenol compound 0.2~0.4 parts, 1 to 3 parts of methacrylate compound.

3. The anti-shedding agent according to claim 1 or 2, Features: The styrene-butadiene-styrene copolymer is linear or star-shaped, and has an average relative molecular weight of 100,000 to 260,000.

4. The anti-shedding agent according to claim 1 or 2, Features: In the ethylene-vinyl acetate copolymer, the combined vinyl acetate mass content is 21wt%~26wt%.

5. The anti-shedding agent according to claim 1 or 2, Features: The p-phenylenediamine compound is one or more of N,N'-diphenyl-p-phenylenediamine, N-cyclohexyl-N'-phenyl-p-phenylenediamine, and N-phenyl-N'-isopropyl-p-phenylenediamine.

6. The anti-shedding agent according to claim 1 or 2, It is characterized in that The coupling agent is one or more of a silane coupling agent, an aluminate coupling agent, and a titanate coupling agent.

7. The anti-shedding agent according to claim 1 or 2, It is characterized in that The hindered phenol compound includes one or more of 2,8-di-tert-butyl-4-methylphenol, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 1,3,5-(3,5-di-tert-butyl-4-hydroxyphenyl)-s-triazine-2,4,6(1H,3H,5H)trione.

8. The anti-shedding agent according to claim 1 or 2, Features: The methacrylate compound is one or a mixture of 2-hydroxyethyl methacrylate, 2-ethylhexyl methacrylate, and ethyl methacrylate.

9. The anti-shedding agent according to claim 1 or 2, Features: The anti-shedding agent is in granular form.

10. A method for preparing the anti-shedding agent according to any one of claims 1 to 9, include: Styrene-butadiene-styrene copolymer, ethylene-vinyl acetate copolymer, resin, nitrogen-containing aromatic compound, p-phenylenediamine compound, coupling agent, hindered phenol compound and methacrylate compound are uniformly mixed, kneaded and granulated to obtain an anti-shedding agent.

11. The method according to claim 10, Features: The mixing conditions are as follows: the mixing temperature is 140° C. to 160° C., and the mixing time is 40 to 80 min; and / or, the granulation is performed by extrusion granulation, and the extrusion granulation temperature is 140° C. to 160° C. 12.An anti-shedding asphalt, include: Petroleum asphalt and the anti-shedding agent according to any one of claims 1 to 9.

13. The anti-shedding asphalt according to claim 12, Features: In the anti-shedding asphalt, the amount of the anti-shedding agent accounts for 2% to 3% of the mass of the anti-shedding asphalt.

14. A method for preparing the anti-shedding asphalt according to claim 12 or 13, include: Firstly, petroleum asphalt is heated and melted, the anti-shedding agent is added, stirred until the mixture is uniformly mixed, and then developed to obtain the anti-shedding asphalt.

15. The preparation method according to claim 14, Features: The heating and melting temperature of petroleum asphalt is 140℃~160℃, the stirring temperature is 140℃~160℃, and the stirring time is 40~80min; the development temperature is 140℃~160℃, and the development time is 4~8 hours.

16. Use of the anti-shedding agent according to any one of claims 1 to 9 or the anti-shedding asphalt according to any one of claims 12 to 13 in airport runways.