Durable hot melt pavement marking paint and method of making same

Abstract

The application relates to the field of road marking paint, and particularly discloses a durable hot-melt road marking paint and a preparation method thereof; the durable hot-melt road marking paint comprises components A and B; the component A comprises the following raw materials in parts by weight: 50-70 parts of an acrylate emulsion, 40-60 parts of a composite fluorescent powder, 1-5 parts of a dispersing agent, 1-5 parts of a thickening agent and 5-15 parts of a composite filler; the preparation method is as follows: S1, the acrylate emulsion and the composite fluorescent powder are uniformly mixed and stirred, then the composite filler, the dispersing agent and the thickening agent are added and uniformly mixed and stirred to obtain the component A; S2, the component B is prepared, the components A and B are mixed and used, and the road marking paint is obtained; the road marking paint has the advantages of not being prone to discoloration and good night-time reflection effect.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of road marking paint, in particular to a durable hot-melt road marking paint and a preparation method thereof. BACKGROUND

[0002] Road traffic marking refers to a mark on the road surface, which is used for guiding, limiting and warning traffic participants by using lines, arrows, words, vertical marks, protruding road marks and contour marks; the function of the road traffic marking is to control and guide traffic, which can be used in cooperation with a sign or independently.

[0003] Hot-melt marking paint is a kind of paint applied on the road for marking road marking; the hot-melt marking paint has the advantages of strong adhesion, good anti-cracking property, bright color, high coating rate and good anti-fouling property; however, when the hot-melt marking paint is used on the road surface, the marking coating formed on the road surface is prone to discoloration, poor night reflection effect and other problems due to friction and rainwater scouring.

[0004] Therefore, how to prepare a marking paint which is not prone to discoloration and has good night reflection effect and is applied to road traffic marking is a problem to be solved. SUMMARY

[0005] In order to prepare a marking paint which is not prone to discoloration and has good night reflection effect and is applied to road traffic marking, the application provides a durable hot-melt road marking paint and a preparation method thereof.

[0006] In the first aspect, the application provides a durable hot-melt road marking paint, which adopts the following technical scheme:

[0007] The durable hot-melt road marking paint comprises A component and B component; the A component comprises the following raw materials in parts by weight: 50-70 parts of acrylate emulsion, 40-60 parts of composite fluorescent powder, 1-5 parts of dispersing agent, 1-5 parts of thickening agent and 5-15 parts of composite filler.

[0008] By adopting the above technical solution, a fluorescent marking paint can be obtained by combining acrylic emulsion and composite fluorescent powder. When applied to roads or the ground, it forms a coating that provides a fluorescent effect. The addition of dispersants and composite fillers facilitates the uniform dispersion of the composite fluorescent powder, ensuring even distribution of the luminescent material in the paint and further enhancing the fluorescent effect of the coating. Furthermore, it promotes the uniform dispersion of the composite filler, and the reinforcing and wear-resistant properties of the composite filler prevent the marking paint coating from discoloring or losing its reflective properties at night due to friction on the road surface. The thickening effect of the thickener improves the adhesion of the raw materials within the paint, making the marking paint coating less prone to cracking. Combined with the good waterproof properties of the acrylic emulsion, the coating is protected from erosion by rainwater, preventing damage to its fluorescent effect.

[0009] Preferably, the acrylate emulsion is methyl methacrylate.

[0010] By adopting the above technical solution, methyl methacrylate as a coating forms a coating with good waterproof and water-resistant properties, making the coating resistant to water erosion on the road surface and less prone to discoloration and decreased fluorescence due to rain erosion; it also has good weather resistance and chemical resistance, and is less prone to discoloration and poor nighttime reflectivity due to sun exposure; at the same time, it has good adhesion and, when combined with a thickener, further improves the adhesion stability of the coating on the road surface, making it less prone to peeling, cracking and other problems.

[0011] Preferably, the composite phosphor is prepared by bonding rare earth phosphor with polycarbonate liquid, then bonding calcium sulfide composite powder, and then bonding polyether ether ketone liquid; the mass ratio of rare earth phosphor, polycarbonate liquid, calcium sulfide composite powder and polyether ether ketone liquid is 1:0.2-0.5:0.5-1:0.1-0.4.

[0012] By adopting the above technical solution, rare earth phosphor, polycarbonate liquid, calcium sulfide composite powder, and polyether ether ketone liquid are combined, and the polycarbonate is used to adhere to the surface of the rare earth phosphor by utilizing its adhesiveness. Then, the calcium sulfide composite powder is bonded, and finally, the polyether ether ketone liquid is used for bonding treatment, thus forming a fluorescent layer structure.

[0013] Utilizing the good elasticity, high strength, and wear resistance of polyetheretherketone (PEEK), it can not only buffer the pressure and impact of vehicles on the coating, reducing wear on the coating surface, but also mitigate the brittleness of polycarbonate, protecting the composite phosphor to adhere stably in the coating and preventing it from breaking and dispersing due to friction and impact. When vehicles rub and impact the coating on the road surface, it is less likely to cause coating discoloration or deterioration of fluorescence. Furthermore, PEEK has good waterproof and moisture-proof properties, protecting calcium sulfide from absorbing moisture and affecting fluorescence, thus ensuring that the composite phosphor has a long-lasting fluorescence effect and can be used on the road surface for a longer period of time, resulting in a long service life.

[0014] The outermost polyetheretherketone (PEEK) liquid has good light transmittance, ensuring that natural light, sunlight, artificial light, and ultraviolet light can contact the calcium sulfide composite powder. Utilizing the light absorption, energy storage, and fluorescence properties of calcium sulfide, it first exhibits fluorescence as darkness falls. Then, the high light transmittance of polycarbonate allows light energy to be gradually absorbed by the rare-earth phosphor. Combined with the energy storage effect of polycarbonate, the rare-earth phosphor exhibits fluorescence even when the fluorescence of calcium sulfide diminishes in the dark. While rare-earth phosphor absorbs light slowly, its fluorescence is long-lasting. Although calcium sulfide composite powder absorbs light quickly, its fluorescence disappears faster. Therefore, by utilizing the progressively layered absorption, energy storage, and fluorescence effects, the coating achieves long-lasting fluorescence at night.

[0015] Preferably, the polycarbonate liquid is composed of polycarbonate melt, porous glass microspheres, silica aerogel and high-permeability polyurethane liquid in a mass ratio of 1:0.05-0.15:0.01-0.05:0.1-0.5.

[0016] By adopting the above technical solution, polycarbonate melt, porous glass microspheres, silica aerogel and high-transparency polyurethane liquid phase are combined. The good light transmittance of high-transparency polyurethane and polycarbonate, combined with the porous and transparent structure of porous glass microspheres and silica aerogel, ensures the entry and refraction of light. After the light passes through the polycarbonate layer formed by the polycarbonate melt, it can be uniformly refracted to various positions, ensuring the uniform absorption of light energy by rare earth phosphor. This achieves uniform loading of light energy while ensuring the luminescence effect of phosphor at night.

[0017] Polycarbonate, porous glass microspheres, and silica aerogel can improve the strength of the coating. Combined with the elasticity of high-transparency polyurethane, the composite phosphor has good toughness and impact resistance, and is not prone to detachment from the coating surface due to vehicle friction and impact. At the same time, porous glass microspheres and silica aerogel have high porosity, so even if wear causes powder to appear, the pores can absorb phosphor as much as possible, ensuring the fluorescent effect of the coating on the road surface.

[0018] Preferably, the calcium sulfide composite powder comprises the following raw materials in parts by weight:

[0019] Calcium sulfide 60-70 parts, strontium sulfate 10-20 parts, potassium sulfate 10-15 parts, sodium chloride 5-10 parts, silver nitrate 1-2 parts, magnesium sulfide 5-10 parts.

[0020] By adopting the above technical solution, the coating formed by the road marking paint can emit a fluorescent effect at night quickly and for a long time, while ensuring the strength of the coating and extending its service life on the road surface.

[0021] Preferably, the polyetheretherketone liquid is composed of a polyetheretherketone melt and porous PMMA microparticles in a mass ratio of 1:0.05-0.2.

[0022] By adopting the above technical solution, polyetheretherketone melt and porous PMMA microparticles are combined. The porous structure of the porous PMMA microparticles promotes light refraction. During the refraction process, the light can better contact with the calcium sulfide composite powder and rare earth phosphor, and increase the energy storage effect of light, prolonging the fluorescence time. Thus, the coating on the road surface has a long-lasting fluorescent effect. Furthermore, by utilizing the good elasticity and toughness of polyetheretherketone, combined with the strength of the porous PMMA microparticles, the abrasion resistance of the coating formed by the road surface marking paint is further improved, protecting the composite phosphor from falling off due to vehicle friction. Thus, the coating still has the advantages of not easily discoloring, good nighttime reflectivity, and not easily cracking after long-term use.

[0023] Preferably, the composite filler is composed of water-white rosin resin-modified polyurethane and modified alumina fiber in a mass ratio of 1:0.5-1.

[0024] By adopting the above technical solution, water-white rosin resin-modified polyurethane and modified alumina fiber are combined. The transparency of water-white rosin resin, combined with the light transmittance of polyurethane and the good light transmittance of alumina fiber, ensures that the addition of composite fillers does not easily affect the absorption and storage of light energy by the composite fluorescent powder in the paint, thus guaranteeing the fluorescent effect of the paint. Furthermore, the water-white rosin resin's water-blocking and moisture-proof properties prevent polyurethane from absorbing moisture and affecting the adhesion stability of the marking coating on the road surface. This ensures that the marking paint is not prone to cracking, discoloration, or fading even when washed by rain. Simultaneously, the modified alumina fiber acts as a connector, improving the bonding stability of the internal raw materials of the marking paint. Combined with the elasticity and toughness of the water-white rosin resin-modified polyurethane, this further enhances the wear resistance and impact resistance of the marking coating on the road surface. Even when subjected to vehicle friction and impact, the composite fluorescent powder is less likely to detach from the coating, protecting the fluorescent effect of the marking coating after long-term use.

[0025] Preferably, the modified alumina fiber is composed of single-crystal alumina fiber and EVA in a mass ratio of 1:0.2-0.6.

[0026] By adopting the above technical solution, monocrystalline alumina fiber and EVA are combined. The transparency of the monocrystalline alumina fiber is utilized to ensure that the addition of modified alumina fiber does not affect the absorption of light energy and emission of fluorescence by the composite phosphor.

[0027] As summer temperatures rise, the temperature on asphalt pavements can reach 60-80℃. EVA on the surface of single-crystal alumina fibers softens and melts at temperatures above 60℃, not only binding the internal materials and improving the coating's adhesion stability on the road surface, but also protecting the composite fluorescent powder from wear and tear caused by vehicle friction, thus preserving the coating's nighttime fluorescence effect. Furthermore, even if the composite fluorescent powder is ground into powder and partially lost, the exposed EVA, when heated, readily adheres to the ground powder, ensuring the fluorescent effect of the road marking paint at night.

[0028] Preferably, the thickener is a polyvinyl alcohol solution.

[0029] By adopting the above technical solution, the acrylic emulsion and polyvinyl alcohol solution are combined, and the carboxyl groups in the acrylic emulsion and the hydroxyl groups in the polyvinyl alcohol attract and connect with each other. Combined with the thickening effect of polyvinyl alcohol, the bonding stability of the raw materials inside the coating is further improved, and the structural density of the coating is increased. As a result, the coating formed by the marking paint has high strength and good wear resistance and impact resistance.

[0030] Secondly, this application provides a method for preparing a durable hot-melt road marking paint, using the following technical solution:

[0031] A method for preparing a durable hot-melt road marking paint includes the following steps:

[0032] S1, acrylate emulsion, and composite fluorescent powder are mixed and stirred evenly. Then, composite filler, dispersant, and thickener are added and mixed and stirred evenly to obtain component A.

[0033] S2. Prepare component B. Mix components A and B immediately to obtain the marking paint.

[0034] By adopting the above technical solutions, the coating formed by the finished road marking paint not only has good adhesion stability and is not prone to cracking, but also is resistant to friction and impact. Even if vehicles rub against it, the paint is not prone to discoloration or poor fluorescence. At the same time, it has good waterproof properties, which can resist the erosion of rainwater, protect the road marking coating from discoloration and deterioration of fluorescence, and extend the service life of the paint on the road surface.

[0035] In summary, this application has the following beneficial effects:

[0036] 1. By combining acrylic emulsion and composite fluorescent powder, a fluorescent road marking paint can be obtained. The addition of dispersants and composite fillers facilitates the uniform dispersion of the composite fluorescent powder, ensuring even dispersion of the luminescent material in the paint and further enhancing the fluorescent effect of the coating. It also promotes the uniform dispersion of the composite filler, whose reinforcing and abrasion-resistant properties prevent discoloration and reduced nighttime reflectivity due to friction on the road surface. Furthermore, the thickening effect of the thickener improves the adhesion of the raw materials within the paint, reducing the likelihood of cracking in the coating. Combined with the good waterproof properties of the acrylic emulsion, the coating is protected from erosion by rainwater, ensuring its fluorescent effect remains unaffected.

[0037] 2. Rare earth phosphors, polycarbonate liquid, calcium sulfide composite powder, and polyetheretherketone liquid are combined to form a fluorescent layer structure. The outermost polyetheretherketone liquid has good light transmittance, ensuring that natural light, sunlight, artificial light, and ultraviolet light can contact the calcium sulfide composite powder. Utilizing the light absorption, energy storage, and fluorescence emission effects of calcium sulfide, the phosphor first exhibits its fluorescent effect as darkness falls. Then, the high light transmittance of polycarbonate allows light energy to be gradually absorbed by the rare earth phosphors. Combined with the light energy dispersion and storage effects of polycarbonate, the rare earth phosphors exhibit their fluorescent effect even when the fluorescence effect of calcium sulfide diminishes in the dark. Rare earth phosphors have a slow light absorption but a long fluorescence effect, while calcium sulfide composite powder absorbs light quickly, but its fluorescence disappears faster than that of rare earth phosphors. Therefore, by utilizing the progressive light absorption, energy storage, and fluorescence effects of each layer, the coating can achieve a long-lasting fluorescent effect at night.

[0038] 3. Polycarbonate melt, porous glass microspheres, silica aerogel, and high-transparency polyurethane liquid phase are combined. The good light transmittance of high-transparency polyurethane and polycarbonate, combined with the porous and transparent structure of porous glass microspheres and silica aerogel, ensures the entry and refraction of light. After the light passes through the polycarbonate layer formed by the polycarbonate melt, it can be uniformly refracted to various positions, ensuring the uniform absorption of light energy by the rare earth phosphor. This achieves uniform light energy loading while ensuring the luminescence effect of the phosphor at night. Detailed Implementation

[0039] The present application will be further described in detail below with reference to the embodiments.

[0040] Preparation example of polycarbonate liquid

[0041] The porous glass microspheres in the following raw materials were purchased from HL-1 porous glass microspheres produced by Changzhou Jiujiu Chemical Co., Ltd.; the high-transparency polyurethane was purchased from Dongguan Siwell Plastic Raw Materials Co., Ltd., grade 80; other raw materials and equipment were all commercially available.

[0042] Preparation Example 1: The polycarbonate liquid was prepared by the following method:

[0043] Weigh out polycarbonate and heat it to 250°C until it is completely melted to obtain polycarbonate melt.

[0044] Weigh out high-permeability polyurethane, heat it to 200℃, and after it is completely melted, you will get a high-permeability polyurethane liquid.

[0045] 0.1 kg of porous glass microspheres with an average particle size of 5 μm were added to 1 kg of polycarbonate melt at a rate of 100 g / min, while the polycarbonate melt was stirred at 120 r / min. Then, 0.03 kg of silica aerogel with an average particle size of 200 nm was added at a rate of 30 g / min, while the polycarbonate melt was stirred continuously. Finally, 0.37 kg of high-permeability polyurethane liquid was added at a rate of 300 mL / min. After thorough mixing, a polycarbonate solution was obtained.

[0046] Preparation Example 2: The difference between this preparation example and Preparation Example 1 is that...

[0047] 0.05 kg of porous glass microspheres with an average particle size of 5 μm were added to 1 kg of polycarbonate melt at a rate of 100 g / min, while the polycarbonate melt was stirred at 120 r / min. Then, 0.01 kg of silica aerogel with an average particle size of 200 nm was added at a rate of 30 g / min, while the polycarbonate melt was stirred continuously. Finally, 0.1 kg of high-permeability polyurethane liquid was added at a rate of 300 mL / min. After thorough mixing, a polycarbonate solution was obtained.

[0048] Preparation Example 3: The difference between this preparation example and Preparation Example 1 is that...

[0049] 0.15 kg of porous glass microspheres with an average particle size of 5 μm were added to 1 kg of polycarbonate melt at a rate of 100 g / min, while the polycarbonate melt was stirred at 120 r / min. Then, 0.05 kg of silica aerogel with an average particle size of 200 nm was added at a rate of 30 g / min, while the polycarbonate melt was stirred continuously. Finally, 0.5 kg of high-permeability polyurethane liquid was added at a rate of 300 mL / min. After thorough mixing, a polycarbonate solution was obtained.

[0050] Preparation example of calcium sulfide composite powder

[0051] All of the following ingredients are commercially available.

[0052] Preparation Example 4: Calcium Sulfide Composite Powder:

[0053] 65 kg of calcium sulfide, 15 kg of strontium sulfate, 12 kg of potassium sulfate, 8 kg of sodium chloride, 1.5 kg of silver nitrate, and 8.5 kg of magnesium sulfide;

[0054] The preparation method is as follows:

[0055] Weigh out calcium sulfide, strontium sulfate, potassium sulfate, sodium chloride, silver nitrate, and magnesium sulfide, mix and stir evenly, then heat at 135℃ for 50 minutes, remove impurities, grind into fine powder, soak in water, filter out the water, dry and disperse the precipitated powder to obtain the finished calcium sulfide composite powder.

[0056] Preparation Example 5: The difference between this preparation example and Preparation Example 4 is that:

[0057] 60 kg of calcium sulfide, 10 kg of strontium sulfate, 10 kg of potassium sulfate, 5 kg of sodium chloride, 1 kg of silver nitrate, and 5 kg of magnesium sulfide.

[0058] Preparation Example 6: The difference between this preparation example and Preparation Example 4 is that:

[0059] 70 kg of calcium sulfide, 20 kg of strontium sulfate, 15 kg of potassium sulfate, 10 kg of sodium chloride, 2 kg of silver nitrate, and 10 kg of magnesium sulfide.

[0060] Preparation example of polyetheretherketone solution

[0061] The porous PMMA microparticles in the following raw materials were obtained by Xi'an Ruixi Biotechnology Co., Ltd.; other raw materials and equipment are commercially available.

[0062] Preparation Example 7: The polyetheretherketone solution was prepared by the following method:

[0063] Weigh out polyetheretherketone and heat it to 350°C. After it is completely melted, you will get a polyetheretherketone melt.

[0064] Add 0.1 kg of porous PMMA microparticles to 1 kg of polyetheretherketone melt. The average particle size of the porous PMMA microparticles is 5 μm and the porosity is 20-25%. The addition rate of the porous PMMA microparticles is 100 g / min. During the addition process, the stirring speed of the polyetheretherketone melt is 120 r / min. Mix evenly to obtain a polyetheretherketone solution.

[0065] Preparation Example 8: The difference between this preparation example and Preparation Example 7 is that:

[0066] 0.05 kg of porous PMMA microparticles with an average particle size of 5 μm were added to 1 kg of polyetheretherketone melt. The addition rate of the porous PMMA microparticles was 100 g / min. During the addition process, the stirring speed of the polyetheretherketone melt was 120 r / min. After uniform mixing, a polyetheretherketone solution was obtained.

[0067] Preparation Example 9: The difference between this preparation example and Preparation Example 7 is that:

[0068] 0.2 kg of porous PMMA microparticles with an average particle size of 5 μm were added to 1 kg of polyetheretherketone melt. The addition rate of the porous PMMA microparticles was 100 g / min. During the addition process, the stirring speed of the polyetheretherketone melt was 120 r / min. After uniform mixing, a polyetheretherketone solution was obtained.

[0069] Preparation example of composite phosphor

[0070] The rare earth fluorescent powder in the following raw materials was purchased from Kunjian Mineral Products Processing Plant in Lingshou County, and is 500 mesh; other raw materials and equipment are all commercially available.

[0071] Preparation Example 10: The composite phosphor was prepared by the following method:

[0072] 0.36 kg of polycarbonate liquid prepared in Preparation Example 1 was uniformly sprayed onto the surface of 1 kg of rare earth phosphor to obtain a carrier phosphor; then 1 kg of calcium sulfide composite powder prepared in Preparation Example 4 was added at a rate of 60 g / min, and the stirring speed of the carrier phosphor was 120 r / min during the addition process to obtain a composite material; finally, 0.25 kg of polyether ether ketone liquid prepared in Preparation Example 7 was uniformly sprayed onto the surface of the composite material, and after drying and dispersion, the finished composite phosphor was obtained.

[0073] Preparation Example 11: The difference between this preparation example and Preparation Example 10 is that:

[0074] 0.2 kg of polycarbonate liquid prepared in Preparation Example 2 was uniformly sprayed onto the surface of 1 kg of rare earth phosphor to obtain a carrier phosphor; then 0.5 kg of calcium sulfide composite powder prepared in Preparation Example 5 was added at a rate of 60 g / min, and the stirring speed of the carrier phosphor was 120 r / min during the addition process to obtain a composite material; finally, 0.1 kg of polyether ether ketone liquid prepared in Preparation Example 8 was uniformly sprayed onto the surface of the composite material, and after drying and dispersion, the finished composite phosphor was obtained.

[0075] Preparation Example 12: The difference between this preparation example and Preparation Example 10 is that:

[0076] 0.5 kg of polycarbonate liquid prepared in Preparation Example 3 was uniformly sprayed onto the surface of 1 kg of rare earth phosphor to obtain a carrier phosphor; then 1 kg of calcium sulfide composite powder prepared in Preparation Example 6 was added at a rate of 60 g / min, and the stirring speed of the carrier phosphor was 120 r / min during the addition process to obtain a composite material; finally, 0.4 kg of polyether ether ketone liquid prepared in Preparation Example 9 was uniformly sprayed onto the surface of the composite material, and after drying and dispersion, the finished composite phosphor was obtained.

[0077] Preparation example of modified alumina fiber

[0078] Preparation Example 13: Modified alumina fibers were prepared by the following method:

[0079] EVA was heated to 90℃ and completely melted to obtain EVA melt; 0.4kg of EVA melt was uniformly sprayed onto the surface of 1kg alumina fiber, the average length of the alumina fiber was 20μm, and after drying and dispersion, modified alumina fiber was obtained.

[0080] Preparation Example 14: The difference between this preparation example and Preparation Example 13 is that:

[0081] EVA was heated to 90℃ and completely melted to obtain EVA melt; 0.2kg of EVA melt was uniformly sprayed onto the surface of 1kg of alumina fiber, the average length of the alumina fiber was 20μm, and after drying and dispersion, modified alumina fiber was obtained.

[0082] Preparation Example 15: The difference between this preparation example and Preparation Example 13 is that:

[0083] EVA was heated to 90℃ and completely melted to obtain EVA melt; 0.6kg of EVA melt was uniformly sprayed onto the surface of 1kg of alumina fiber, the average length of the alumina fiber was 20μm, and after drying and dispersion, modified alumina fiber was obtained.

[0084] Preparation example of water-white rosin resin modified polyurethane

[0085] The water-white rosin resin in the following raw materials was purchased from Guangzhou Qunlin Chemical Co., Ltd., with a softening point of 95℃; the polyurethane microparticles were purchased from Dongguan Siwell Plastic Raw Materials Co., Ltd., grade 80; other raw materials and equipment were commercially available.

[0086] Preparation Example 16: Water-white rosin resin modified polyurethane was prepared by the following method:

[0087] Water-white rosin resin is heated to 100℃ and completely melted to obtain water-white rosin resin melt; 0.3kg of water-white rosin resin melt is uniformly sprayed onto the surface of 1kg of polyurethane particles, and then dried and dispersed until the polyurethane particles do not stick together or agglomerate to obtain water-white rosin resin modified polyurethane. Example

[0088] Example 1: A durable hot-melt road marking paint:

[0089] It contains component A and component B, with a mass ratio of component A to component B of 5:1;

[0090] Component A: 60 kg of acrylate emulsion, 50 kg of composite phosphor, 3 kg of dispersant, 3 kg of thickener, and 10 kg of composite filler; the acrylate emulsion is methyl methacrylate; the composite phosphor is the composite phosphor prepared in Preparation Example 10; the dispersant is sodium hexametaphosphate; the thickener is a polyvinyl alcohol solution, which is a 2% (w / w) aqueous solution of polyvinyl alcohol; the composite filler consists of water-white rosin resin-modified polyurethane and modified alumina fiber in a 1:1 (w / w) ratio, the water-white rosin resin-modified polyurethane is the water-white rosin resin-modified polyurethane prepared in Preparation Example 16, and the modified alumina fiber is the modified alumina fiber prepared in Preparation Example 13;

[0091] Component B is the curing agent, and the curing agent is a diisocyanate.

[0092] The preparation method is as follows:

[0093] S1. Weigh out the acrylate emulsion and composite fluorescent powder, mix and stir evenly, then add composite filler, dispersant and thickener, mix and stir evenly to obtain component A;

[0094] S2. Prepare component B. Mix components A and B immediately to obtain the marking paint.

[0095] Example 2: The difference between this example and Example 1 is that:

[0096] Component A: 50 kg acrylate emulsion, 40 kg composite phosphor, 1 kg dispersant, 1 kg thickener, and 5 kg composite filler; the acrylate emulsion is methyl methacrylate; the composite phosphor is the composite phosphor prepared in Preparation Example 11; the dispersant is sodium hexametaphosphate; the thickener is a polyvinyl alcohol solution, which is a 2% (w / w) aqueous solution of polyvinyl alcohol; the composite filler consists of a water-white rosin resin-modified polyurethane and modified alumina fiber in a mass ratio of 1:0.5, the water-white rosin resin-modified polyurethane is the water-white rosin resin-modified polyurethane prepared in Preparation Example 16, and the modified alumina fiber is the modified alumina fiber prepared in Preparation Example 14.

[0097] Example 3: The difference between this example and Example 1 is that:

[0098] Component A: 70 kg of acrylate emulsion, 60 kg of composite phosphor, 5 kg of dispersant, 5 kg of thickener, and 15 kg of composite filler; the acrylate emulsion is methyl methacrylate; the composite phosphor is the composite phosphor prepared in Preparation Example 12; the dispersant is sodium hexametaphosphate; the thickener is a polyvinyl alcohol solution, which is a 2% (w / w) aqueous solution of polyvinyl alcohol; the composite filler consists of a water-white rosin resin-modified polyurethane and modified alumina fiber in a 1:1 (w / w) ratio, the water-white rosin resin-modified polyurethane is the water-white rosin resin-modified polyurethane prepared in Preparation Example 16, and the modified alumina fiber is the modified alumina fiber prepared in Preparation Example 15.

[0099] Example 4: The difference between this example and Example 1 is that:

[0100] The composite phosphor did not contain calcium sulfide composite powder.

[0101] Example 5: The difference between this example and Example 1 is that:

[0102] In the composite phosphor, the polycarbonate liquid is replaced by an equal mass of rosin resin melt; the rosin resin melt is obtained by heating rosin resin to 120℃ to soften and melt it, and the rosin resin is purchased from Wuhan Mengqi Technology Co., Ltd., and its color is yellow.

[0103] Example 6: The difference between this example and Example 1 is that:

[0104] No polyetheretherketone solution was added to the composite fluorescent powder.

[0105] Example 7: The difference between this example and Example 1 is that:

[0106] No porous glass microspheres or silica aerogel were added during the preparation of the polycarbonate solution in the composite phosphor.

[0107] Example 8: The difference between this example and Example 1 is that:

[0108] No high-permeability polyurethane liquid was added during the preparation of the polycarbonate liquid in the composite phosphor.

[0109] Example 9: The difference between this example and Example 1 is that:

[0110] No porous PMMA microparticles were added during the preparation of the polyether ether ketone solution in the composite phosphor.

[0111] Example 10: The difference between this example and Example 1 is that:

[0112] In the preparation of composite fillers, polyurethane modified with water-white rosin resin was replaced with an equal mass of polyurethane.

[0113] Preparation Example 11: The difference between this example and Example 1 is that:

[0114] In the composite filler, the water-white rosin resin modified polyurethane was replaced with rosin resin particles of equal mass; the rosin resin was purchased from Wuhan Mengqi Technology Co., Ltd., and its color was yellow.

[0115] Preparation Example 12: The difference between this example and Example 1 is that:

[0116] No EVA was added during the preparation of the modified alumina fiber in the composite filler.

[0117] Comparative Example

[0118] Comparative Example 1: The difference between this comparative example and Example 1 is that:

[0119] No composite filler was added to the raw materials.

[0120] Performance testing

[0121] 1. Fluorescence performance detection

[0122] Marking paint was prepared using the methods described in Examples 1-12. The marking paint was sprayed onto asphalt test blocks with a size of 20cm × 20cm. The thickness of the coating formed by the marking paint was 100μm. The fluorescence effect (retroreflection brightness coefficient) was tested according to JT / T280-2022.

[0123] Abrasion resistance testing

[0124] Marking paint was prepared using the preparation methods of Examples 1-4, 6-9, 12 and Comparative Example 1, respectively. The marking paint was sprayed onto asphalt test blocks with a size of 20cm×20cm. The coating thickness of the marking paint was 100μm, and the test samples were obtained.

[0125] The abrasion resistance of the samples was tested according to the method of GB / T1768-2006 mentioned in JT / T280-2022; and the fluorescence effect of the polished samples was tested again, and the retroreflection brightness coefficient was recorded.

[0126] Water resistance test

[0127] Marking paint was prepared using the methods described in Examples 1-3, 6, and 10, respectively. The marking paint was sprayed onto asphalt test blocks with a size of 20cm × 20cm. The coating thickness formed by the marking paint was 100μm. Water resistance was tested according to GB / T5029-1985. The blocks were soaked in water at 23℃ for 24h, and the color change was observed. No color change and no loss of gloss scored 10 points, while no color change and no gloss scored 0 points.

[0128] Flexibility test

[0129] Marking paint was prepared using the methods described in Examples 1-3. The marking paint was sprayed onto asphalt test blocks with a size of 20cm × 20cm. The thickness of the coating formed by the marking paint was 100μm. The flexibility was tested according to GB / T1731-2020, and the data were recorded.

[0130] Adhesion stability test

[0131] Marking paint was prepared using the methods described in Examples 1-3 and 12, respectively. The marking paint was sprayed onto asphalt test blocks with a size of 20cm × 20cm. The coating thickness formed by the marking paint was 100μm, and the samples were obtained. The adhesion level was tested according to GB / T9286-2021, and the data were recorded.

[0132] Table 1 Performance Test Table

[0133]

[0134] As can be seen from Examples 1-3 and Table 1, the marking paint prepared in this application has good fluorescence effect, and after rubbing, it is not easy to excessively affect the fluorescence effect. It also has good water resistance and is not easy to discolor or lose its luster due to water immersion. At the same time, it has good flexibility and high adhesion, and can adhere to the road surface relatively stably.

[0135] Combining Examples 1 and 4-12 with Table 1, it can be seen that in Example 4, no calcium sulfide composite powder was added to the composite fluorescent powder. Compared with Example 1, the brightness coefficient of Example 4 was lower than that of Example 1, and the wear was greater than that of Example 1. This indicates that the addition of calcium sulfide composite powder can not only increase the fluorescence effect, but also increase the wear resistance of the coating formed by the marking paint.

[0136] In Example 5, the polycarbonate solution was replaced with an equal mass of rosin resin melt in the composite phosphor. Compared with Example 1, the brightness coefficient of Example 5 was lower than that of Example 1. This indicates that because the light transmittance of rosin resin melt is worse than that of polycarbonate solution, it is easy to affect the light absorption and energy storage effect of the composite phosphor, thereby affecting the fluorescence effect.

[0137] In Example 6, no polyetheretherketone (PEEK) solution was added to the composite phosphor. Compared to Example 1, the brightness coefficient of Example 6 after wear was lower than that of Example 1, the wear was greater than that of Example 1, and the water resistance was worse than that of Example 1. This indicates that the PEEK film formed by the PEEK solution has water-blocking properties and high toughness and strength, which improves the wear resistance of the coating and protects the fluorescent effect and water resistance of the coating.

[0138] In Example 7, no porous glass microspheres or silica aerogel were added during the preparation of the polycarbonate solution in the composite phosphor. Compared with Example 1, the brightness coefficient of Example 7 was lower than that of Example 1, and the wear was greater than that of Example 1. This indicates that the addition of porous glass microspheres and silica aerogel can increase the light absorption effect of the composite phosphor, thereby converting it into fluorescence with a higher fluorescence effect. Furthermore, porous glass microspheres and silica aerogel have good strength and toughness, which can improve the wear resistance of the coating.

[0139] In Example 8, no high-transparency polyurethane liquid was added during the preparation of the polycarbonate liquid in the composite phosphor. Compared with Example 1, the brightness coefficient of Example 8 after wear was lower than that of Example 1, and the wear was greater than that of Example 1. This indicates that the addition of high-transparency polyurethane can increase wear resistance, thereby ensuring the fluorescence effect. Even on the surface of the vehicle friction coating, it is not easy for the coating surface to discolor or lose its luster.

[0140] In Example 9, no porous PMMA microparticles were added during the preparation of the polyether ether ketone solution in the composite phosphor. Compared with Example 1, the brightness coefficient of Example 9 was lower than that of Example 1, and the wear was greater than that of Example 1. This indicates that porous PMMA microparticles can improve the light energy storage effect by utilizing the light transmission and refraction effects, thereby improving the fluorescence effect. Moreover, PMMA particles have high strength and can impart wear resistance to the coating.

[0141] In Example 10, the polyurethane modified with water-white rosin resin was replaced with the same mass of polyurethane during the preparation of the composite filler. Compared with Example 1, the water resistance score of Example 10 was lower than that of Example 1. This indicates that polyurethane has hygroscopic properties, while polyurethane coated with water-white rosin resin can improve the water resistance of the coating.

[0142] In Example 11, the polyurethane modified with water-white rosin resin was replaced with rosin resin particles of equal mass in the composite filler. Compared with Example 1, the gloss coefficient of Example 11 was lower than that of Example 1, indicating that the rosin resin was yellowish and the light transmittance was about 65-70%, which could easily affect the fluorescence effect of the finished coating.

[0143] In Example 12, no EVA was added during the preparation of the modified alumina fiber in the composite filler. Compared with Example 1, the wear of Example 12 was greater and the adhesion was worse than that of Example 1, indicating that the addition of EVA can increase wear resistance and weather resistance.

[0144] Based on Example 1 and Comparative Example 1 and Table 1, it can be seen that Comparative Example 1 did not contain any composite filler. Compared with Example 1, Comparative Example 1 had greater wear and poorer adhesion. This indicates that the addition of composite filler can increase the strength and wear resistance of the coating.

[0145] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A durable hot-melt road marking paint, characterized in that, It includes component A and component B; component A contains the following raw materials in parts by weight: 50-70 parts of acrylate emulsion, 40-60 parts of composite phosphor, 1-5 parts of dispersant, 1-5 parts of thickener, and 5-15 parts of composite filler; the composite phosphor is prepared by bonding rare earth phosphor with polycarbonate liquid, then bonding calcium sulfide composite powder, and finally bonding polyetheretherketone liquid; the mass ratio of rare earth phosphor, polycarbonate liquid, calcium sulfide composite powder, and polyetheretherketone liquid is 1:0.2-0.5:0.5-1:0.1-0.4; the polyetheretherketone liquid is composed of polyetheretherketone melt and porous PMMA particles in a mass ratio of 1:0.05-0.

2.

2. The durable hot-melt road marking paint according to claim 1, characterized in that: The acrylate emulsion is methyl methacrylate.

3. The durable hot-melt road marking paint according to claim 1, characterized in that, The polycarbonate liquid is composed of polycarbonate melt, porous glass microspheres, silica aerogel and high-permeability polyurethane liquid in a mass ratio of 1:0.05-0.15:0.01-0.05:0.1-0.

5.

4. The durable hot-melt road marking paint according to claim 1, characterized in that, The calcium sulfide composite powder comprises the following raw materials in parts by weight: Calcium sulfide 60-70 parts, strontium sulfate 10-20 parts, potassium sulfate 10-15 parts, sodium chloride 5-10 parts, silver nitrate 1-2 parts, magnesium sulfide 5-10 parts.

5. A durable hot-melt road marking paint according to claim 1, characterized in that, The composite filler is composed of water-white rosin resin modified polyurethane and modified alumina fiber in a mass ratio of 1:0.5-1.

6. A durable hot-melt road marking paint according to claim 5, characterized in that, The modified alumina fiber is composed of single-crystal alumina fiber and EVA in a mass ratio of 1:0.2-0.

6.

7. The durable hot-melt road marking paint according to claim 1, characterized in that, The thickener is a polyvinyl alcohol solution.

8. A method for preparing a durable hot-melt road marking paint according to any one of claims 1-7, characterized in that, Includes the following steps: S1, acrylate emulsion, and composite fluorescent powder are mixed and stirred evenly. Then, composite filler, dispersant, and thickener are added and mixed and stirred evenly to obtain component A. S2. Prepare component B. Mix components A and B immediately to obtain the marking paint.

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