Hot melt road marking paint

Abstract

This invention discloses a hot-melt road marking paint. It is made from the following raw material components in parts by weight: 50-100 parts of aminopropyltriethoxysilane-modified petroleum resin, 20-40 parts of ethylene-ethyl acrylate resin, 20-40 parts of glass microspheres, 20-40 parts of filler, 3-8 parts of pigment, 5-10 parts of abrasion-resistant agent, 1-5 parts of anti-settling agent, 1-3 parts of antioxidant, and 1-3 parts of silane coupling agent. The hot-melt road marking paint of this invention uses aminopropyltriethoxysilane-modified petroleum resin and ethylene-ethyl acrylate resin as the main materials, resulting in high mechanical properties. The addition of glass microspheres and transparent gunmetal powder enhances the reflectivity of the material. The combined use of silicon carbide micropowder and polytetrafluoroethylene micropowder enhances the abrasion resistance of the material.

Description

Technical Field

[0001] This invention belongs to the field of road marking technology, specifically relating to a hot-melt road marking paint and its preparation method. Background Technology

[0002] Road marking paints are classified into three types: room temperature solvent-based paints, heated solvent-based paints, and hot-melt road marking paints. Hot-melt road marking paints were first successfully developed in Europe in the mid-1950s, and my country began using them after the 1990s.

[0003] Hot-melt road marking paint is typically made from thermoplastic resin, reflective materials, fillers, and additives. Currently, thermoplastic resins have poor film-forming properties and low mechanical properties after film formation. While transparent glass microspheres are generally used as reflective materials, their reflective performance, though improved to some extent, is still insufficient. Hot-melt road marking paint generally has poor abrasion resistance. Patent CN108659686A discloses a hot-melt reflective road marking paint, which is prepared by mixing 110-120 parts by weight of filler, 20-25 parts by weight of modified rosin-alkyd resin, 5-10 parts by weight of EVA resin, 7-8 parts by weight of pigment, 2.0-2.4 parts by weight of plasticizer, and 40-50 parts by weight of glass microspheres; this road marking paint exhibits poor mechanical properties and abrasion resistance. Summary of the Invention

[0004] The purpose of this invention is to provide a hot-melt road marking paint and its preparation method.

[0005] A hot-melt road marking paint is made from the following raw material components in parts by weight: 50-100 parts of aminopropyltriethoxysilane modified petroleum resin, 20-40 parts of ethylene-ethyl acrylate resin, 20-40 parts of glass microspheres, 20-40 parts of filler, 3-8 parts of pigment, 5-10 parts of abrasion resistant agent, 1-5 parts of anti-settling agent, 1-3 parts of antioxidant, and 1-3 parts of silane coupling agent.

[0006] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: Take 150-200 parts by weight of hydrogenated petroleum resin, 85-100 parts by weight of epichlorohydrin, and 0.5-1.5 parts by weight of tetrabutylammonium bromide. Mix them and heat under reflux at 90-100℃ for 1-2 hours. Remove residual epichlorohydrin by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. Take 480-500 parts by weight of hydrogenated petroleum resin glycidyl ester and 200-300 parts by weight of aminopropyltriethoxysilane, add them to a reactor, and heat and stir under nitrogen protection at 80-90℃ and 300-500 r / min for 2-3 hours to obtain aminopropyltriethoxysilane modified petroleum resin.

[0007] The filler is one or more of the following: talc powder, diatomaceous earth, quartz sand, barium sulfate, muscovite powder, and gunmetal powder.

[0008] The pigment is one or more of titanium dioxide, chrome yellow, molybdenum bismuth yellow, and iron oxide red.

[0009] The wear-resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder in a mass ratio of 1:1.

[0010] The anti-settling agent is one or more of bentonite, silica, and N,N-methylene(ethyl)bisacrylamide.

[0011] The antioxidant is one or more of triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate], pentaerythritol diphosphite, and tris(2,4-di-tert-butylphenyl)phosphite.

[0012] The silane coupling agent is one or more of silane coupling agents KH-550, KH-560, and KH-570.

[0013] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 50-100 parts of aminopropyltriethoxysilane modified petroleum resin and 20-40 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 20-40 parts of glass microspheres, 20-40 parts of filler, 3-8 parts of pigment, 5-10 parts of wear-resistant agent, 1-5 parts of anti-settling agent, 1-3 parts of antioxidant, and 1-3 parts of silane coupling agent, stir and mix evenly to prepare the paint.

[0014] The beneficial effects of the present invention are as follows: The hot-melt road marking paint of the present invention uses aminopropyltriethoxysilane modified petroleum resin and ethylene-ethyl acrylate resin as the main materials, and the material has high mechanical properties; the addition of glass microspheres and transparent gunmetal powder in the components enhances the reflective properties of the material; the combined use of silicon carbide micro powder and polytetrafluoroethylene micro powder in the components enhances the wear resistance of the material. Detailed Implementation

[0015] To facilitate understanding of the present invention, a more comprehensive description will be given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0016] Example 1

[0017] A hot-melt road marking paint is made from the following raw material components in parts by weight: 70 parts of aminopropyltriethoxysilane modified petroleum resin, 30 parts of ethylene-ethyl acrylate resin, 30 parts of glass microspheres, 30 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550; wherein the wear-resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1.

[0018] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 180 parts by weight of hydrogenated petroleum resin, 90 parts by weight of epichlorohydrin, and 1 part by weight of tetrabutylammonium bromide are mixed and heated under reflux at 95°C for 1.5 h. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 480 parts by weight of hydrogenated petroleum resin glycidyl ester and 260 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 85°C and 400 r / min for 2.5 h to obtain aminopropyltriethoxysilane modified petroleum resin.

[0019] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 70 parts of aminopropyltriethoxysilane modified petroleum resin and 30 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 30 parts of glass microspheres, 30 parts of gun crystal powder, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550, stir and mix evenly to prepare the paint.

[0020] Example 2

[0021] A hot-melt road marking paint is made from the following raw material components in parts by weight: 50 parts of aminopropyltriethoxysilane modified petroleum resin, 20 parts of ethylene-ethyl acrylate resin, 20 parts of glass microspheres, 10 parts of talc powder, 10 parts of diatomaceous earth, 3 parts of chrome yellow, 5 parts of wear-resistant agent, 1 part of N,N-methylene(ethyl)bisacrylamide, 1 part of triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate], and 1 part of silane coupling agent KH-560; wherein the wear-resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1.

[0022] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 150 parts by weight of hydrogenated petroleum resin, 85 parts by weight of epichlorohydrin, and 0.5 parts by weight of tetrabutylammonium bromide are mixed and heated under reflux at 90°C for 1 hour. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 480 parts by weight of hydrogenated petroleum resin glycidyl ester and 200 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 80°C and 300 r / min for 2 hours to obtain aminopropyltriethoxysilane modified petroleum resin.

[0023] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 50 parts of aminopropyltriethoxysilane modified petroleum resin and 20 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 20 parts of glass microspheres, 10 parts of talc powder, 10 parts of diatomaceous earth, 3 parts of chrome yellow, 5 parts of wear-resistant agent, 1 part of N,N-methylene(ethyl)bisacrylamide, 1 part of triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate], and 1 part of silane coupling agent KH-560, stir and mix evenly to prepare the paint.

[0024] Example 3

[0025] A hot-melt road marking paint is made from the following raw material components in parts by weight: 100 parts of aminopropyltriethoxysilane modified petroleum resin, 40 parts of ethylene-ethyl acrylate resin, 40 parts of glass microspheres, 40 parts of barium sulfate, 8 parts of iron oxide red, 10 parts of abrasion resistant agent, 5 parts of bentonite, 3 parts of tris(2,4-di-tert-butylphenyl) phosphite, and 3 parts of silane coupling agent KH-570; wherein the abrasion resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1.

[0026] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 200 parts by weight of hydrogenated petroleum resin, 100 parts by weight of epichlorohydrin, and 1.5 parts by weight of tetrabutylammonium bromide are mixed and heated under reflux at 100°C for 2 hours. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 500 parts by weight of hydrogenated petroleum resin glycidyl ester and 300 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 90°C and 500 r / min for 3 hours to obtain aminopropyltriethoxysilane modified petroleum resin.

[0027] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 100 parts of aminopropyltriethoxysilane modified petroleum resin and 40 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 40 parts of glass microspheres, 40 parts of barium sulfate, 8 parts of iron oxide red, 10 parts of wear-resistant agent, 5 parts of bentonite, 3 parts of tris(2,4-di-tert-butylphenyl) phosphite and 3 parts of silane coupling agent KH-570, stir and mix evenly to prepare the paint.

[0028] Comparative Example 1

[0029] A hot-melt road marking paint is made from the following raw material components in parts by weight: 100 parts of aminopropyltriethoxysilane modified petroleum resin, 30 parts of glass microspheres, 30 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550; wherein the wear-resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1.

[0030] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 180 parts by weight of hydrogenated petroleum resin, 90 parts by weight of epichlorohydrin, and 1 part by weight of tetrabutylammonium bromide are mixed and heated under reflux at 95°C for 1.5 h. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 480 parts by weight of hydrogenated petroleum resin glycidyl ester and 260 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 85°C and 400 r / min for 2.5 h to obtain aminopropyltriethoxysilane modified petroleum resin.

[0031] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 100 parts of aminopropyltriethoxysilane modified petroleum resin according to the weight ratio, stir and mix evenly, then add 30 parts of glass microspheres, 30 parts of gun crystal powder, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550, stir and mix evenly to prepare the paint.

[0032] Comparative Example 2

[0033] A hot-melt road marking paint is made from the following raw material components in parts by weight: 100 parts ethylene-ethyl acrylate resin, 30 parts glass microspheres, 30 parts gunmetal powder, 6 parts titanium dioxide, 8 parts abrasion resistant agent, 3 parts silica, 2 parts pentaerythritol diphosphite, and 2 parts silane coupling agent KH-550; wherein the abrasion resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1.

[0034] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 100 parts of ethylene-ethyl acrylate resin by weight, stir and mix evenly, then add 30 parts of glass microspheres, 30 parts of gun crystal powder, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550, stir and mix evenly to prepare the paint.

[0035] Comparative Example 3

[0036] A hot-melt road marking paint is made from the following raw material components in parts by weight: 70 parts of aminopropyltriethoxysilane modified petroleum resin, 30 parts of ethylene-ethyl acrylate resin, 60 parts of glass microspheres, 6 parts of titanium dioxide, 8 parts of abrasion resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550; wherein the abrasion resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1.

[0037] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 180 parts by weight of hydrogenated petroleum resin, 90 parts by weight of epichlorohydrin, and 1 part by weight of tetrabutylammonium bromide are mixed and heated under reflux at 95°C for 1.5 h. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 480 parts by weight of hydrogenated petroleum resin glycidyl ester and 260 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 85°C and 400 r / min for 2.5 h to obtain aminopropyltriethoxysilane modified petroleum resin.

[0038] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 70 parts of aminopropyltriethoxysilane modified petroleum resin and 30 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 60 parts of glass microspheres, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite and 2 parts of silane coupling agent KH-550, stir and mix evenly to prepare the paint.

[0039] Comparative Example 4

[0040] A hot-melt road marking paint is made from the following raw material components in parts by weight: 70 parts of aminopropyltriethoxysilane modified petroleum resin, 30 parts of ethylene-ethyl acrylate resin, 60 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550; wherein the wear-resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1.

[0041] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 180 parts by weight of hydrogenated petroleum resin, 90 parts by weight of epichlorohydrin, and 1 part by weight of tetrabutylammonium bromide are mixed and heated under reflux at 95°C for 1.5 h. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 480 parts by weight of hydrogenated petroleum resin glycidyl ester and 260 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 85°C and 400 r / min for 2.5 h to obtain aminopropyltriethoxysilane modified petroleum resin.

[0042] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 70 parts of aminopropyltriethoxysilane modified petroleum resin and 30 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 60 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of wear-resistant agent, 3 parts of silica, 2 parts of pentaerythritol diphosphite and 2 parts of silane coupling agent KH-550, stir and mix evenly to prepare the paint.

[0043] Comparative Example 5

[0044] A hot-melt road marking paint is made from the following raw material components in parts by weight: 70 parts of aminopropyltriethoxysilane modified petroleum resin, 30 parts of ethylene-ethyl acrylate resin, 30 parts of glass microspheres, 30 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of silicon carbide micro powder, 3 parts of silicon dioxide, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550.

[0045] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 180 parts by weight of hydrogenated petroleum resin, 90 parts by weight of epichlorohydrin, and 1 part by weight of tetrabutylammonium bromide are mixed and heated under reflux at 95°C for 1.5 h. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 480 parts by weight of hydrogenated petroleum resin glycidyl ester and 260 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 85°C and 400 r / min for 2.5 h to obtain aminopropyltriethoxysilane modified petroleum resin.

[0046] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 70 parts of aminopropyltriethoxysilane modified petroleum resin and 30 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 30 parts of glass microspheres, 30 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of silicon carbide micro powder, 3 parts of silicon dioxide, 2 parts of pentaerythritol diphosphite and 2 parts of silane coupling agent KH-550, stir and mix evenly to prepare the paint.

[0047] Comparative Example 6

[0048] A hot-melt road marking paint is made from the following raw material components in parts by weight: 70 parts of aminopropyltriethoxysilane modified petroleum resin, 30 parts of ethylene-ethyl acrylate resin, 30 parts of glass microspheres, 30 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of polytetrafluoroethylene micro powder, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550.

[0049] The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: 180 parts by weight of hydrogenated petroleum resin, 90 parts by weight of epichlorohydrin, and 1 part by weight of tetrabutylammonium bromide are mixed and heated under reflux at 95°C for 1.5 h. The residual epichlorohydrin is removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. 480 parts by weight of hydrogenated petroleum resin glycidyl ester and 260 parts by weight of aminopropyltriethoxysilane are added to a reactor and heated and stirred under nitrogen protection at 85°C and 400 r / min for 2.5 h to obtain aminopropyltriethoxysilane modified petroleum resin.

[0050] The preparation method of the hot-melt road marking paint is carried out according to the following steps: Take 70 parts of aminopropyltriethoxysilane modified petroleum resin and 30 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 30 parts of glass microspheres, 30 parts of gunmetal powder, 6 parts of titanium dioxide, 8 parts of polytetrafluoroethylene micro powder, 3 parts of silica, 2 parts of pentaerythritol diphosphite, and 2 parts of silane coupling agent KH-550, stir and mix evenly to prepare the paint.

[0051] Experimental example:

[0052] The coatings obtained in Examples 1-3 and Comparative Examples 1-6 were heated to 180°C and applied to the treated substrate according to the coating preparation method in GB / T1727-92, with a total thickness of 1.8 mm.

[0053] Using the method specified in 6.4.7 of JT / T 280-2004, the samples prepared in Examples 1-3 and Comparative Examples 1-2 were kept at a constant temperature of 60±2℃ in an oven for 4 hours, and then immediately removed from the oven to determine their compressive strength according to the method in 6.4.7b).

[0054] Each experiment was performed in triplicate, and the average value was taken. Statistical analysis was performed using SPSS 24.0 software. Quantitative data were analyzed using... (mean ± standard deviation) represents the mean. The Kolmogorov-Smirnov test was used to test the normality of the data. For normally distributed data, the t-test was used to compare the differences in means between two groups. A p-value < 0.05 was considered statistically significant.

[0055] The measurement results are shown in Table 1:

[0056] Table 1

[0057]

[0058] Note: * indicates that compared with Example 1 group, P<0.05.

[0059] The retroreflectance coefficient (mcd.lx) of the samples prepared in Examples 1-3 and Comparative Examples 3-4 was determined using the method specified in JT / T 280-2004. -1 .m -2 The measurement results are shown in Table 2:

[0060] Table 2

[0061]

[0062] Note: * indicates that compared with Example 1 group, P<0.05.

[0063] The abrasion resistance of the materials prepared in Examples 1-3 and Comparative Examples 5-6 of this invention was tested according to the industry standard JT / T280-2004 for road marking paint. The test results are shown in Table 3.

[0064] Table 3

[0065]

[0066] Note: * indicates that compared with Example 1 group, P<0.05.

[0067] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A hot-melt road marking paint, characterized in that, It is made from the following raw material components in parts by weight: 50-100 parts of aminopropyltriethoxysilane modified petroleum resin, 20-40 parts of ethylene-ethyl acrylate resin, 20-40 parts of glass microspheres, 20-40 parts of gunmetal powder, 3-8 parts of pigment, 5-10 parts of wear-resistant agent, 1-5 parts of anti-settling agent, 1-3 parts of antioxidant, and 1-3 parts of silane coupling agent; wherein the wear-resistant agent is a mixture of silicon carbide micro powder and polytetrafluoroethylene micro powder mixed in a mass ratio of 1:1; The preparation method of the aminopropyltriethoxysilane modified petroleum resin is as follows: Take 150-200 parts by weight of hydrogenated petroleum resin, 85-100 parts by weight of epichlorohydrin, and 0.5-1.5 parts by weight of tetrabutylammonium bromide. Mix them and heat under reflux at 90-100℃ for 1-2 hours. Remove residual epichlorohydrin by vacuum distillation to obtain hydrogenated petroleum resin glycidyl ester. Take 480-500 parts by weight of hydrogenated petroleum resin glycidyl ester and 200-300 parts by weight of aminopropyltriethoxysilane, add them to a reactor, and heat and stir under nitrogen protection at 80-90℃ and 300-500 r / min for 2-3 hours to obtain aminopropyltriethoxysilane modified petroleum resin.

2. The hot-melt road marking paint according to claim 1, characterized in that, The pigment is one or more of titanium dioxide, chrome yellow, molybdenum bismuth yellow, and iron oxide red.

3. The hot-melt road marking paint according to claim 1, characterized in that, The anti-settling agent is one or more of bentonite, silica, and N,N-methylene(ethyl)bisacrylamide.

4. The hot-melt road marking paint according to claim 1, characterized in that, The antioxidant is one or more of triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate], pentaerythritol diphosphite, and tris(2,4-di-tert-butylphenyl)phosphite.

5. The hot-melt road marking paint according to claim 1, characterized in that, The silane coupling agent is one or more of silane coupling agents KH-550, KH-560, and KH-570.

6. The preparation method of the hot-melt road marking paint according to claim 1, characterized in that, The following steps are to be performed: Take 50-100 parts of aminopropyltriethoxysilane modified petroleum resin and 20-40 parts of ethylene-ethyl acrylate resin according to the weight ratio, stir and mix evenly, then add 20-40 parts of glass microspheres, 20-40 parts of filler, 3-8 parts of pigment, 5-10 parts of wear-resistant agent, 1-5 parts of anti-settling agent, 1-3 parts of antioxidant, and 1-3 parts of silane coupling agent, stir and mix evenly to prepare the product.

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