All-weather long-acting reflective marking paint and its construction method

Abstract

The present application relates to reticle paint and construction technology field, specifically relates to a kind of all-weather long-acting retroreflective marking paint and its construction method, including A, B, C three paint components and later maintenance component D;A component in the present application is designed with water-based acrylic-epoxy hybrid resin emulsion and silane coupling agent, greatly improve the depth of road surface penetration and adhesion, from the root, close road surface pore and strengthen interlayer anchoring, prevent the failure of primer resulting in marking sheet peeling, and the embedded double-silicon film of B component is used to cover energy storage luminous powder and core-shell magnetic porous glass microspheres, with the ability of active light-emitting and high-refraction light, so that the marking is still clear in rainy night and light source condition, further, the design of C component can improve the protection ability to marking, three component gradient cooperation, can break through the limitation of traditional passive retroreflective with active energy storage light, eliminate the problem of wet water film optical failure, meet the purpose of all-weather clear visibility.

Description

Technical Field

[0001] This invention relates to the field of road marking paint and construction technology, specifically to an all-weather long-lasting reflective road marking paint and its construction method. Background Technology

[0002] Road marking paint is a specialized material used for road markings. Its core function is to maintain excellent reflectivity in various weather conditions, including dry, wet, and even rainy nights, ensuring clear visibility for drivers and guaranteeing traffic safety. All-weather long-lasting reflective road marking paint is a high-performance, primarily two-component type. Through special material and structural design, it provides superior reflectivity under various weather and lighting conditions and boasts a longer service life. Due to its outstanding safety performance, all-weather long-lasting reflective road marking paint is particularly suitable for road sections with extremely high driving safety requirements. All-weather long-lasting reflective road marking paint is mostly multi-component and typically employs a multi-stage application process of "primer first, then coat," requiring no heating during the entire application process, making it more environmentally friendly.

[0003] For example, application number CN200610035230.7, publication date 20071031, describes a water-based long-lasting reflective road traffic marking paint and its preparation and application method. This paint is a water-based composition consisting of binders, fillers, pigments, coupling agents, various additives and organic solvents. It provides a water-based paint that does not require the use of a primer to enhance adhesion, can be directly sprayed onto the road surface, and has a strong adhesion to road materials (including asphalt and cement) and glass microspheres, thereby maintaining the long life and high reflectivity of traffic markings.

[0004] For example, application number CN202510599521.1, with authorization announcement date of 20251028, describes a functional coating for long-lasting reflective road markings and its preparation method. The coating, by weight, comprises the following raw materials: 40 parts polyacrylic acid resin emulsion. 60 parts, defoamer 1 3 parts, modified nano-silicon carbide 3 5 parts, modified glass microspheres 1 3 parts, filler 4 10 parts, curing agent 1 3 parts, dispersant 2 5 portions, 30 ml of deionized water 35 samples. Nano-silicon carbide was modified with maleic anhydride and then grafted with polyphenylene ether. The polyphenylene ether improved the interfacial compatibility between the nano-silicon carbide and the matrix, promoted uniform dispersion of the nano-silicon carbide, and inhibited agglomeration, significantly improving the wear resistance and impact resistance of the coating. Benzophenone structures were grafted onto glass microspheres using a silane coupling agent, achieving a high-density directional distribution of ultraviolet-absorbing groups. This maintained the coating's transparency, while the surface graft layer inhibited photo-oxidation chain reactions, significantly enhancing the coating's anti-aging ability.

[0005] Traditional road marking paints are mostly focused on single-function reinforcement, with insufficient interlayer adhesion. Under heavy traffic and complex weather conditions, they are prone to problems such as interlayer peeling and collapse of reflective structures. Moreover, they rely too much on passively reflective glass microspheres, resulting in a sharp drop in visibility at night in rain or when there is insufficient light. They also lack active light-emitting capabilities. In addition, traditional road marking construction relies heavily on manual layout, which limits accuracy and efficiency. Furthermore, they lack digital quality control and full life cycle maintenance methods, making it difficult to meet the comprehensive requirements of modern smart roads for high precision, long life, and low maintenance.

[0006] In view of this, there is an urgent need to design an all-weather, long-lasting reflective coating and its application method to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide an all-weather, long-lasting reflective coating and its application method to address the aforementioned shortcomings in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A long-lasting all-weather reflective marking paint, composed of four components A, B, C and D, forming a marking system with gradient functions; Component A is the primer component, which achieves deep penetration and sealing of pavement pores and enhanced interlayer adhesion through the synergistic effect of water-based hybrid resin and silane coupling agent. Component A is used to seal pavement pores and enhance interlayer adhesion. The components of Component A, by mass parts, are as follows: The composition includes 40-50 parts of waterborne acrylic-epoxy hybrid resin emulsion or silicone-acrylic emulsion, 1.5-3 parts of silane coupling agent, 0.5-2 parts of penetrating wetting agent or adhesion promoter, wherein the penetrating wetting agent is a polyether-modified polysiloxane wetting agent, the adhesion promoter is an epoxy phosphate ester or modified polyester adhesion promoter, 2-5 parts of film-forming aid, wherein the film-forming aid is at least one of alcohol ester dodecyl, dipropylene glycol butyl ether, diethylene glycol butyl ether or a mixture of multiple thereof in any proportion, 2-5 parts of film-forming aid, 15-30 parts of filler, 0.5-2 parts of additives, and 10-25 parts of deionized water. After the A component is applied, its penetration depth into the road surface is ≥0.2 mm, and its adhesion is ≥2.5 MPa. In component A: The solid content of the waterborne acrylic-epoxy hybrid resin emulsion or silicone-acrylic emulsion is 45%-55%, and its glass transition temperature is -20℃-30℃. The silane coupling agent is at least one of KH550, KH560, and KH570, or a mixture of multiple silanes in any proportion; The filler is at least one of heavy calcium carbonate, silica powder, talc powder or calcined kaolin, or a mixture of multiple materials in any proportion, with a particle size of 800-2000 mesh.

[0009] Component B is a cross-linking enhanced functional layer component. It forms a network structure that combines chemical cross-linking and magnetic assisted polymerization by embedding a double silicon film to encapsulate energy-storing luminescent powder and core-shell magnetic porous glass microspheres in a cross-linkable resin matrix. It integrates active luminescence, high refractive index reflection and in-situ repair potential. Component B is the main functional layer of the marking, used to form a dense network structure of chemical cross-linking and magnetically assisted polymerization, and integrates reflectivity, self-luminescence, and repair potential. The components of Component B are as follows by mass parts: 35-45 parts of methyl methacrylate prepolymer or epoxy-polyurethane composite resin; Dual-silicon film-coated modified SrAl2O4:Eu 2+ ,Dy 3+ 10-18 parts of energy-storing luminescent powder; Core-shell magnetic porous glass microspheres have a structure consisting of a Fe3O4 magnetic core encapsulated in 5-15 parts of a mesoporous SiO2 shell. 4-12 parts of rutile titanium dioxide or natural mineral pigments; 15-30 parts of filler material; 1-3 parts of nano anti-aging agent; 1-3 parts of silane coupling agent, wherein the silane coupling agent is at least one of KH550, KH560, and KH570 or a mixture of multiple silane coupling agents in any proportion; The total amount of dispersant, anti-settling agent and defoamer is 0.5-2 parts, wherein the dispersant is a sodium polycarboxylate dispersant, the anti-settling agent is organobentonite or fumed silica, and the defoamer is an organosilicon defoamer; The microcapsule encapsulates 3-6 parts of a foaming agent, the capsule wall being at least one of urea-formaldehyde resin, melamine-formaldehyde resin, polyurethane or polymethyl methacrylate or a mixture of multiples in any proportion, and the core being a low-boiling-point alkane physical foaming agent. The curing agent, benzoyl peroxide, is used at a rate of 1.0%-2.5% of the total mass of all components in component B except the curing agent. It is added externally during construction. During the preparation of component B: The mass ratio of methyl methacrylate prepolymer or epoxy-polyurethane composite resin in component B to curing agent benzoyl peroxide is 100:1.0-100:2.5, and the curing agent is added externally during construction. Component B further comprises a crosslinking agent, wherein the amount of the crosslinking agent is 1%-5% of the mass of the methyl methacrylate prepolymer or the epoxy-polyurethane composite resin, and the crosslinking agent is selected from ethylene glycol dimethacrylate, trimethylolpropane triacrylate or divinylbenzene; The drying time of component B after application at room temperature is 10-30 minutes; The filler material in component B is at least one of quartz powder, heavy calcium carbonate, talc powder, mica powder, silica powder or hollow ceramic microspheres or a mixture of multiple materials in any proportion, with a particle size of 200-1250 mesh. The natural mineral pigment is at least one of iron oxide red, iron oxide yellow, ultramarine or ochre, or a mixture of multiple pigments in any proportion, with a weather resistance rating of ≥8. The nano anti-aging agent is at least one of nano SiO2, TiO2, ZnO or CeO2 or a mixture of multiple nano SiO2 in any proportion, with a particle size of 5-50 nm, and is modified by surface hydrophobicity of silane coupling agent. The core-shell magnetic porous glass microspheres and the double-silica film-coated modified SrAl2O4:Eu in component B 2+ ,Dy 3+ The energy-storing luminescent powder and the microcapsule-encapsulated foaming agent are: The core-shell magnetic porous glass microspheres have a core-shell structure with Fe3O4 as the core and mesoporous SiO2 as the outer shell. The core particle size is 10 nm-10 μm, and the saturation magnetization is 30-120 emu / g. The outer shell thickness is 20-500 nm, the mesopore size is 2-50 nm, and the BET specific surface area is ≥400 m² / g. The overall particle size of the core-shell magnetic porous glass microspheres is 5-200 μm, the refractive index is 1.85-1.95, and its surface is modified by grafting with a silane coupling agent. The dual-silicon film coating modified SrAl2O4:Eu 2+ ,Dy 3+ The energy-storing luminescent powder has a double-layer coating structure with an inner inorganic silicon film and an outer organic silicon film. Its pH growth rate in aqueous dispersion is reduced by more than 60% compared with the unmodified luminescent powder. Its luminescence brightness is ≥190 mcd / m² after 10 minutes of excitation cessation, and its afterglow time is ≥12 h. When the microcapsules are used for in-situ repair, they preferably achieve controllable micro-expansion of 10%-30%. The microcapsule particle size is 5-100 μm, the foaming trigger temperature is 40-150℃, the foaming volume expansion ratio is 1.1-30 times, and the specific structure of the foaming agent encapsulated in the microcapsules is as follows: The capsule wall is made of urea-formaldehyde resin, melamine-formaldehyde resin, polyurethane, or polymethyl methacrylate. The core is a physical foaming agent.

[0010] Component C is a transparent, wear-resistant protective layer component used to protect layer B and give the markings anti-fouling and anti-yellowing properties; Component C is a transparent, wear-resistant surface layer used to protect the functional structure of layer B, and also has anti-fouling and anti-yellowing properties. The components of component C by mass parts are as follows: The mixture comprises 55-75 parts of aliphatic polyurethane-silicone modified transparent resin or silicone modified acrylic transparent resin, 5-15 parts of nano-wear-resistant filler, 1.5-3 parts of ultraviolet absorber and stabilizer, 0.5-1.5 parts of hydrophobic modifier, and 0.5-1.5 parts of leveling agent and defoamer combined, wherein the leveling agent is a silicone or acrylic leveling agent, the defoamer is a silicone defoamer, and 10-30 parts of diluent or deionized water, wherein the diluent is at least one of butyl acetate and propylene glycol methyl ether acetate or a mixture of multiple types in any proportion; The pencil hardness of component C is ≥2H. During the manufacturing process of component C: The light transmittance of the aliphatic polyurethane-silicone modified transparent resin or the silicone modified acrylic transparent resin is ≥90%. The nano-wear-resistant filler is at least one of nano-alumina, zirconium oxide, silicon dioxide or diamond micro powder or a mixture of multiple materials in any proportion, with a particle size of 10-100 nm. The ultraviolet absorber is a benzotriazole or triazine; The stabilizer is a hindered amine light stabilizer, and the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is 1:1 to 1:2. The hydrophobic modifier is a fluorocarbon-modified polysiloxane or a long-chain alkylsilane, which makes the water contact angle of the C component coating surface ≥95°.

[0011] Component D is the post-repair triggering liquid component, used to penetrate and activate the microcapsule foaming agent pre-embedded in component B to achieve in-situ micro-expansion repair of the marking wear; Component D is a post-repair triggering liquid, used to penetrate and activate the microcapsule foaming agent pre-embedded in component B, causing the markings to expand slightly in situ to repair wear and blurring. It can also be used with magnetic equipment to straighten the shape of the markings. The component ratio of component D by mass is as follows: The mixture comprises 75-95 parts of an aliphatic ester or fatty alcohol polyoxyethylene ether activator and penetrant, 0.5-5 parts of a thickening stabilizer, wherein the thickening stabilizer is at least one of hydroxyethyl cellulose, hydroxypropyl methyl cellulose or polyurethane associative thickener or a mixture of multiple types in any proportion, 1-5 parts of an antifreeze agent or retarder, wherein the antifreeze agent is propylene glycol, the retarder is polyvinyl alcohol, and 5-20 parts of deionized water. During the preparation of component D: The mass ratio of the activator to the penetrant is 3:1-8:2; The activator is an aliphatic ester, selected from at least one of butyl acetate, ethyl propionate, ethyl lactate, propylene glycol methyl ether acetate, or propylene carbonate, or a mixture of multiples in any proportion; The penetrant is a fatty alcohol polyoxyethylene ether, selected from at least one of JFC, AEO-3, AEO-5, AEO-7 or AEO-9 or a mixture of multiple types in any proportion; The D component also contains 0.5%-2% by mass of an acid anhydride or sulfonic acid chemical foaming accelerator in the total mass of the activator and penetrant mixture; The viscosity of component D is 50-500 mPa·s, and the application rate is 50-150 g / m³. 2 The penetration time after spraying is ≤15 min, and the trigger response time for microcapsule-encapsulated foaming agent is 1-15 min.

[0012] It should be noted that the total dry film thickness of the three layers (components A, B, and C) is 0.5-2.5 mm, wherein: Component A has a layer thickness of 0.05-0.20 mm; Stratification of component B is 0.3-2.0 mm; The C group has stratification of 0.05-0.20 mm.

[0013] A method for applying all-weather, long-lasting reflective road marking paint includes the following steps: Step S1. Road cleaning and visual exploration: Clean the road surface to remove dust, oil and loose materials, and ensure that the road surface is dry and clean. During the cleaning process, visual exploration equipment is used to scan the construction area to obtain road surface data and mark the damaged areas. It should be noted that in step S1: The cleaning process is detailed below: A combination of high-pressure water jetting, vacuuming, and mechanical sweeping is used to clean the road surface, removing dust, oil, loose particles, and old road marking residue, ensuring the road surface is clean and dry with a moisture content of ≤8%. During visual exploration, drones or mobile inspection equipment equipped with 3D LiDAR and high-definition cameras are used to perform low-altitude scanning of the road section to be constructed, and to obtain data on road surface smoothness, slope, curvature of curves and residual status of old road markings. Then, the data on road surface smoothness, slope, curvature of curves and residual status of old road markings are imported into modeling software. Through point cloud data registration and meshing processing, a digital twin model of the road surface in the construction area is constructed, and the location and size of cracks with a width ≥2mm or potholes with a depth ≥5mm are automatically marked. After the exploration is completed, the marked defective areas are filled and leveled using repair materials that are compatible with the road surface material. For asphalt pavement, cold-mixed asphalt or polymer-modified cement mortar is used, and for cement concrete pavement, epoxy mortar or polymer quick-drying cement mortar is used. After repair, the road surface flatness deviation is ≤2mm / m.

[0014] Step S2. Coating and Construction Selection: Select an all-weather long-lasting reflective road marking coating system and matching construction equipment according to the road grade and climate conditions, verify the coating composition and ratio, then mix the coating and seal the road to be constructed. It should be noted that in step S2: The supporting construction equipment includes: low-pressure airless spraying equipment, scraper or high-pressure airless spraying equipment, high-refractive-index glass microsphere synchronous spreading device, external directional magnetic field equipment, magnetic roller pressing equipment, RTK differential positioning base station, high-precision laser projection equipment and AR / VR auxiliary glasses. During the mixing process, component B of the coating and the curing agent are mixed on-site in proportion, and stirred with a stirrer at a speed of 200-300 r / min for 3-5 minutes until uniform. The mixed component B should be used within a 15-40 minute pot life.

[0015] Step S3. Marker layout and visual assistance: Step S3.1. Data import and calibration: Import the designed road marking data into the portable projection system, then set up a high-precision laser projection device in the construction area, and use known road reference points to locate the device and calibrate the image distortion. It should be noted that the road marking data in step S3.1 is a road traffic marking design file in CAD or BIM format, which includes the line type, width, spacing, position coordinates and radius of curvature parameters of lane lines, zebra crossings, guide arrows and text markings; The road reference point is at least one of the following: curbstone, existing road marking endpoint, road intersection, or a mixture of multiple points in any proportion; Step S3.2. Projection and boundary locking: Using a high-precision laser projection device, the outer contour boundary line, specific pattern filling area or center guide line of the marking are projected directly and without distortion onto the cleaned road surface with high-contrast visible light. During the projection process, adjustments and boundary locking are performed to ensure that the position, curvature and spacing of the marking meet the design requirements. It should be noted that the projection brightness and contrast of high-precision laser projection equipment can be adaptively adjusted according to the ambient light intensity, and the specific requirements are as follows: In strong light environments, the projection brightness is no less than 5000 lumens, and the projected visible light is a high-contrast green or red laser line. During the projection adjustment and boundary locking process: The width of the projection boundary line is ≤3mm, and the overall deviation between the projection pattern and the design drawing is ≤±2mm; Step S3.3. Equipment selection and construction preparation: After the projection is adjusted, select AR / VR auxiliary glasses to overlay and display the three-dimensional outline of the marking line, design thickness, travel speed deviation and construction boundary warning information in the field of vision, in preparation for subsequent visual coating; It should be noted that AR / VR assistive glasses are augmented reality smart glasses with spatial positioning capabilities, which overlay and display at least one of the following information or multiple information mixed in any proportion within their field of view in real time: The three-dimensional virtual model of the road markings, the recommended design thickness values ​​of each component A / B / C, the deviation between the current construction equipment speed and the design speed, the coating thickness warning threshold, and the construction boundary crossing warning information; The threshold values ​​for construction deviations are as follows: the coating thickness deviation threshold is set to ±10% of the design thickness, the travel speed deviation threshold is set to ±15% of the design speed, and the construction boundary crossing threshold is set to ≥5mm beyond the projected boundary line. When the construction deviation exceeds the set threshold, the AR / VR auxiliary glasses will issue an audible and visual alarm. The AR / VR auxiliary glasses have a built-in processing unit that uses the high-precision position signal obtained in real time by the RTK differential positioning base station to calculate the actual speed and position of the current construction equipment and compare it in real time with the predetermined speed and projection boundary coordinates imported from the design documents. When the deviation exceeds the set threshold, the audible and visual alarm will be triggered. The AR auxiliary glasses simultaneously receive the positioning signal from the projection device and enhance the brightness of the projection edges.

[0016] Step S4. Graded coating and marking construction: Pour the A, B and C components of the coating that have been mixed in step S2 into the coating equipment, and then strictly follow the order of A component → B component → C component to carry out three-level layer construction. The entire construction process is guided by the projected pattern and visual aids. It should be noted that the specific process parameters for the three-level layered construction are as follows: When applying the primer layer of component A: Apply using low-pressure airless spraying equipment at a pressure of 10-15 MPa. Hold the spray gun perpendicular to the road surface at a distance of 30-50 cm. Control the dry film thickness to 0.05-0.20 mm and the coating weight to 0.2-0.4 kg / m². 2 Allow to air dry for 5-15 minutes until surface dry after spraying. During the construction of the functional layer of component B: After component A is surface dry, component B is applied by scraping or high-pressure airless spraying, with the dry film thickness controlled at 0.3-2.0 mm. During the construction of the C-component protective layer: After component B has dried to the surface, component C is applied using low-pressure spraying equipment. The spraying pressure is 8-12 MPa, the spray gun is 30-40 cm away from the road surface, the dry film thickness is controlled at 0.05-0.20 mm, and the coating amount is 0.1-0.3 kg / m². 2 ; The total thickness of the three-layer dry film consisting of components A, B, and C is controlled between 0.5 and 2.5 mm.

[0017] Step S5. Drying and curing: After each layer of components in step S4 is coated, a drying process is carried out for a period of time. During the drying process, drying equipment can be used to assist drying according to the ambient temperature. It should be noted that the drying and curing conditions are as follows: Natural drying is suitable for environments with temperatures between 20-35℃ and relative humidity ≤70%, where: Surface drying time for component A is 5-15 minutes; Component B non-stick drying time is 10-30 minutes, and complete curing time is 20-60 minutes; The drying time for component C is 10-30 minutes, and component C is cured naturally at room temperature or with the assistance of hot air. During the drying and curing process, when the ambient temperature is below 15℃ or the relative humidity is above 70%, a hot air circulation heating device is used to blow hot air at 40-60℃ onto the marking surface for auxiliary drying, and the auxiliary drying time is 5-10 minutes.

[0018] Step S6. Quality Inspection and Record Delivery: Inspect the appearance, thickness, adhesion, retroreflective coefficient and anti-skid performance of the road markings, record the construction parameters and test data, and deliver the construction file for acceptance. Step S7. Post-maintenance and quality inspection: Regularly inspect the condition of the road markings. When the road markings show wear or reduced reflectivity, spray the D-component repair triggering liquid to activate the microcapsule foaming agent inside the road markings, causing the road markings to expand slightly. Then, use a magnetic roller pressing device to straighten and repair the road markings and restore their performance.

[0019] It should be noted that: The specific conditions for triggering the repair are as follows: When the inspection finds that the retroreflection coefficient of the road marking has decreased to less than 60% of the initial value, or the thickness of the road marking has been worn by more than 20%, or the edges are blurred and the regularity deviation is ≥3mm, the post-maintenance procedure will be initiated. During repair work: First, clean the surface of the road markings and let it dry. Then, use a low-pressure sprayer to evenly spray the D-component repair triggering liquid. The spraying amount is 50-150g / m² and the spraying pressure is 0.3-0.8MPa. Component D penetrates into the marking coating within 5-15 minutes, with a penetration depth ≥0.5mm, causing the marking coating to undergo slight volume expansion. The expansion rate is controlled at 10%-30%, and the thickness recovery rate reaches over 80%. Standardization and processing: Within 8-15 minutes after the D component is sprayed, a vehicle-mounted magnetic roller pressing device is used to straighten and repair the markings. The magnetic field strength of the magnetic roller pressing device is 0.1-0.5T, the roller pressing pressure is 0.1-0.3MPa, and the traveling speed is 3-8km / h, so that the edge regularity deviation of the markings is restored to ≤2mm.

[0020] Furthermore, the construction method is applicable to asphalt pavement and cement concrete pavement. The ambient temperature during construction should be controlled between 5℃ and 40℃, the relative humidity should be ≤85%, the pavement temperature should be at least 3℃ higher than the dew point temperature, and construction should be avoided during rain, snow, fog, freezing, and winds with a force of ≥5.

[0021] In the above technical solution, the present invention provides an all-weather long-lasting reflective marking coating and its application method, the beneficial effects of which are: (1) In this invention, component A is designed with water-based acrylic-epoxy hybrid resin emulsion and silane coupling agent, which greatly improves the penetration depth and adhesion of the road surface, seals the road surface pores from the source and strengthens the interlayer anchoring, and prevents the marking from peeling off in pieces due to primer failure. Component B is embedded with double silicon film coated with energy-storing luminescent powder and core-shell magnetic porous glass microspheres, which has the ability to actively emit light and high refractive reflection, so that the marking is still clearly visible in rainy nights and in the absence of light source. Furthermore, the design of component C can improve the protection of the marking. The gradient combination of the three components can break through the limitations of traditional passive reflection with active energy storage and light emission, eliminate the problem of optical failure of wet water film, and meet the purpose of clear visibility in all weather.

[0022] (2) This invention projects the outline of the road marking directly onto the road surface using a high-precision laser projection device. Combined with AR / VR auxiliary glasses with spatial positioning function, it displays the three-dimensional model of the road marking, the design thickness of each layer, the deviation of the construction speed and the warning information of boundary crossing in real time. This reduces the cumulative error that is difficult to control by manual layout from the centimeter level to the millimeter level. This not only greatly improves the accuracy of road marking construction, but also avoids the problem of constant adjustment required by manual layout, thus greatly improving the efficiency of road marking construction.

[0023] (3) The present invention pre-sets microcapsule-encapsulated foaming agent in component B. When the marking shows wear, retroreflection coefficient attenuation, or wear of the thickness of component C layer of the marking exceeds the set value, component D can be sprayed. Since component D contains aliphatic ester activator, fatty alcohol polyoxyethylene ether penetrant and acid anhydride or sulfonic acid chemical foaming promoter, component D can penetrate after coating and trigger microcapsules to undergo controllable micro-expansion, causing the marking to expand. Subsequently, with the help of magnetic roller pressing equipment to straighten the edge of the marking, the marking can be repaired, extending the high-performance life cycle of the marking by several times and greatly reducing the maintenance cost of the marking.

[0024] (4) By introducing core-shell magnetic porous glass microspheres into component B and using an external directional magnetic field to guide them during construction, the microspheres can be arranged in a gradient in the resin matrix to form a specific microstructure orientation, thereby enhancing the effective area of ​​the reflective interface and the ability to resist crushing. Moreover, the aliphatic polyurethane-organosilicon modified transparent resin used in component C, combined with fluorocarbon modified polysiloxane or long-chain alkylsilane, gives the coating surface excellent hydrophobic properties, giving the marking surface outstanding hydrophobic, anti-fouling and anti-yellowing properties. Furthermore, through the synergy between the magnetic directional microstructure of component B and the transparent wear-resistant protective layer of component C, the marking can maintain a high retroreflection coefficient retention rate after long-term wear, enabling the marking to meet the long-term service requirements of extreme climates such as high cold, high humidity and strong ultraviolet radiation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a flowchart illustrating an embodiment of the all-weather long-lasting reflective marking coating and its application method according to the present invention.

[0027] Figure 2 This is a schematic diagram showing the comparison curves of various embodiments of the present invention, which describes an all-weather, long-lasting reflective coating and its application method.

[0028] Figure 3 This is a schematic diagram showing the comparison curves between the embodiments and comparative examples of the present invention, which describes an all-weather long-lasting reflective line coating and its construction method. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] The present invention provides an all-weather long-lasting reflective marking coating, which is composed of four components, A, B, C and D, forming a marking system with gradient functions. Component A is the primer component, which achieves deep penetration and sealing of pavement pores and enhanced interlayer adhesion through the synergistic effect of water-based hybrid resin and silane coupling agent. Component A is used to seal pavement pores and enhance interlayer adhesion. The components of Component A, by mass parts, are as follows: The composition includes 40-50 parts of waterborne acrylic-epoxy hybrid resin emulsion or silicone-acrylic emulsion, 1.5-3 parts of silane coupling agent, 0.5-2 parts of penetrating wetting agent or adhesion promoter, wherein the penetrating wetting agent is a polyether-modified polysiloxane wetting agent, the adhesion promoter is an epoxy phosphate ester or modified polyester adhesion promoter, 2-5 parts of film-forming aid, wherein the film-forming aid is at least one of alcohol ester dodecyl, dipropylene glycol butyl ether, diethylene glycol butyl ether or a mixture of multiple thereof in any proportion, 2-5 parts of film-forming aid, 15-30 parts of filler, 0.5-2 parts of additives, and 10-25 parts of deionized water. After the A component is applied, its penetration depth into the road surface is ≥0.2 mm, and its adhesion is ≥2.5 MPa. In component A: The solid content of the waterborne acrylic-epoxy hybrid resin emulsion or silicone-acrylic emulsion is 45%-55%, and its glass transition temperature is -20℃-30℃. The silane coupling agent is at least one of KH550, KH560, and KH570, or a mixture of multiple silanes in any proportion; The filler is at least one of heavy calcium carbonate, silica powder, talc powder or calcined kaolin, or a mixture of multiple materials in any proportion, with a particle size of 800-2000 mesh.

[0031] Component B is a cross-linking enhanced functional layer component. It forms a network structure that combines chemical cross-linking and magnetic assisted polymerization by embedding a double silicon film to encapsulate energy-storing luminescent powder and core-shell magnetic porous glass microspheres in a cross-linkable resin matrix. It integrates active luminescence, high refractive index reflection and in-situ repair potential. Component B is the main functional layer of the marking, used to form a dense network structure of chemical cross-linking and magnetically assisted polymerization, and integrates reflectivity, self-luminescence, and repair potential. The components of Component B are as follows by mass parts: 35-45 parts of methyl methacrylate prepolymer or epoxy-polyurethane composite resin; Dual-silicon film-coated modified SrAl2O4:Eu 2+ ,Dy 3+ 10-18 parts of energy-storing luminescent powder; Core-shell magnetic porous glass microspheres have a structure consisting of a Fe3O4 magnetic core encapsulated in 5-15 parts of a mesoporous SiO2 shell. 4-12 parts of rutile titanium dioxide or natural mineral pigments; 15-30 parts of filler material; 1-3 parts of nano anti-aging agent; 1-3 parts of silane coupling agent, wherein the silane coupling agent is at least one of KH550, KH560, and KH570 or a mixture of multiple silane coupling agents in any proportion; The total amount of dispersant, anti-settling agent and defoamer is 0.5-2 parts, wherein the dispersant is a sodium polycarboxylate dispersant, the anti-settling agent is organobentonite or fumed silica, and the defoamer is an organosilicon defoamer; The microcapsule encapsulates 3-6 parts of a foaming agent, the capsule wall being at least one of urea-formaldehyde resin, melamine-formaldehyde resin, polyurethane or polymethyl methacrylate or a mixture of multiples in any proportion, and the core being a low-boiling-point alkane physical foaming agent. The curing agent, benzoyl peroxide, is used at a rate of 1.0%-2.5% of the total mass of all components in component B except the curing agent. It is added externally during construction. During the preparation of component B: The mass ratio of methyl methacrylate prepolymer or epoxy-polyurethane composite resin in component B to curing agent benzoyl peroxide is 100:1.0-100:2.5, and the curing agent is added externally during construction. Component B further comprises a crosslinking agent, wherein the amount of the crosslinking agent is 1%-5% of the mass of the methyl methacrylate prepolymer or the epoxy-polyurethane composite resin, and the crosslinking agent is selected from ethylene glycol dimethacrylate, trimethylolpropane triacrylate or divinylbenzene; The drying time of component B after application at room temperature is 10-30 minutes; The filler material in component B is at least one of quartz powder, heavy calcium carbonate, talc powder, mica powder, silica powder or hollow ceramic microspheres or a mixture of multiple materials in any proportion, with a particle size of 200-1250 mesh. The natural mineral pigment is at least one of iron oxide red, iron oxide yellow, ultramarine or ochre, or a mixture of multiple pigments in any proportion, with a weather resistance rating of ≥8. The nano anti-aging agent is at least one of nano SiO2, TiO2, ZnO or CeO2 or a mixture of multiple nano SiO2 in any proportion, with a particle size of 5-50 nm, and is modified by surface hydrophobicity of silane coupling agent. The core-shell magnetic porous glass microspheres and the double-silica film-coated modified SrAl2O4:Eu in component B 2+ ,Dy 3+ The energy-storing luminescent powder and the microcapsule-encapsulated foaming agent are: The core-shell magnetic porous glass microspheres have a core-shell structure with Fe3O4 as the core and mesoporous SiO2 as the outer shell. The core particle size is 10 nm-10 μm, and the saturation magnetization is 30-120 emu / g. The outer shell thickness is 20-500 nm, the mesopore size is 2-50 nm, and the BET specific surface area is ≥400 m² / g. The overall particle size of the core-shell magnetic porous glass microspheres is 5-200 μm, the refractive index is 1.85-1.95, and its surface is modified by grafting with a silane coupling agent. The dual-silicon film coating modified SrAl2O4:Eu 2+ ,Dy 3+ The energy-storing luminescent powder has a double-layer coating structure with an inner inorganic silicon film and an outer organic silicon film. Its pH growth rate in aqueous dispersion is reduced by more than 60% compared with the unmodified luminescent powder. Its luminescence brightness is ≥190 mcd / m² after 10 minutes of excitation cessation, and its afterglow time is ≥12 h. When the microcapsules are used for in-situ repair, they preferably achieve controllable micro-expansion of 10%-30%. The microcapsule particle size is 5-100 μm, the foaming trigger temperature is 40-150℃, the foaming volume expansion ratio is 1.1-30 times, and the specific structure of the foaming agent encapsulated in the microcapsules is as follows: The capsule wall is made of urea-formaldehyde resin, melamine-formaldehyde resin, polyurethane, or polymethyl methacrylate. The core is a physical foaming agent.

[0032] Component C is a transparent, wear-resistant protective layer component used to protect layer B and give the markings anti-fouling and anti-yellowing properties; Component C is a transparent, wear-resistant surface layer used to protect the functional structure of layer B, and also has anti-fouling and anti-yellowing properties. The components of component C by mass parts are as follows: The mixture comprises 55-75 parts of aliphatic polyurethane-silicone modified transparent resin or silicone modified acrylic transparent resin, 5-15 parts of nano-wear-resistant filler, 1.5-3 parts of ultraviolet absorber and stabilizer, 0.5-1.5 parts of hydrophobic modifier, and 0.5-1.5 parts of leveling agent and defoamer combined, wherein the leveling agent is a silicone or acrylic leveling agent, the defoamer is a silicone defoamer, and 10-30 parts of diluent or deionized water, wherein the diluent is at least one of butyl acetate and propylene glycol methyl ether acetate or a mixture of multiple types in any proportion; The pencil hardness of component C is ≥2H. During the manufacturing process of component C: The light transmittance of the aliphatic polyurethane-silicone modified transparent resin or the silicone modified acrylic transparent resin is ≥90%. The nano-wear-resistant filler is at least one of nano-alumina, zirconium oxide, silicon dioxide or diamond micro powder or a mixture of multiple materials in any proportion, with a particle size of 10-100 nm. The ultraviolet absorber is a benzotriazole or triazine; The stabilizer is a hindered amine light stabilizer, and the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is 1:1 to 1:2. The hydrophobic modifier is a fluorocarbon-modified polysiloxane or a long-chain alkylsilane, which makes the water contact angle of the C component coating surface ≥95°.

[0033] Component D is the post-repair triggering liquid component, used to penetrate and activate the microcapsule foaming agent pre-embedded in component B to achieve in-situ micro-expansion repair of the marking wear; Component D is a post-repair triggering liquid, used to penetrate and activate the microcapsule foaming agent pre-embedded in component B, causing the markings to expand slightly in situ to repair wear and blurring. It can also be used with magnetic equipment to straighten the shape of the markings. The component ratio of component D by mass is as follows: The mixture comprises 75-95 parts of an aliphatic ester or fatty alcohol polyoxyethylene ether activator and penetrant, 0.5-5 parts of a thickening stabilizer, wherein the thickening stabilizer is at least one of hydroxyethyl cellulose, hydroxypropyl methyl cellulose or polyurethane associative thickener or a mixture of multiple types in any proportion, 1-5 parts of an antifreeze agent or retarder, wherein the antifreeze agent is propylene glycol, the retarder is polyvinyl alcohol, and 5-20 parts of deionized water. During the preparation of component D: The mass ratio of the activator to the penetrant is 3:1-8:2; The activator is an aliphatic ester, selected from at least one of butyl acetate, ethyl propionate, ethyl lactate, propylene glycol methyl ether acetate, or propylene carbonate, or a mixture of multiples in any proportion; The penetrant is a fatty alcohol polyoxyethylene ether, selected from at least one of JFC, AEO-3, AEO-5, AEO-7 or AEO-9 or a mixture of multiple types in any proportion; The D component also contains 0.5%-2% by mass of an acid anhydride or sulfonic acid chemical foaming accelerator in the total mass of the activator and penetrant mixture; The viscosity of component D is 50-500 mPa·s, and the application rate is 50-150 g / m³. 2 The penetration time after spraying is ≤15 min, and the trigger response time for microcapsule-encapsulated foaming agent is 1-15 min.

[0034] It should be noted that the total dry film thickness of the three layers (components A, B, and C) is 0.5-2.5 mm, wherein: Component A has a layer thickness of 0.05-0.20 mm; Stratification of component B is 0.3-2.0 mm; The C group has stratification of 0.05-0.20 mm.

[0035] A method for applying all-weather, long-lasting reflective road marking paint includes the following steps: Step S1. Road cleaning and visual exploration: Clean the road surface to remove dust, oil and loose materials, and ensure that the road surface is dry and clean. During the cleaning process, visual exploration equipment is used to scan the construction area to obtain road surface data and mark the damaged areas. It should be noted that in step S1: The cleaning process is detailed below: A combination of high-pressure water jetting, vacuuming, and mechanical sweeping is used to clean the road surface, removing dust, oil, loose particles, and old road marking residue, ensuring the road surface is clean and dry with a moisture content of ≤8%. During visual exploration, drones or mobile inspection equipment equipped with 3D LiDAR and high-definition cameras are used to perform low-altitude scanning of the road section to be constructed, and to obtain data on road surface smoothness, slope, curvature of curves and residual status of old road markings. Then, the data on road surface smoothness, slope, curvature of curves and residual status of old road markings are imported into modeling software. Through point cloud data registration and meshing processing, a digital twin model of the road surface in the construction area is constructed, and the location and size of cracks with a width ≥2mm or potholes with a depth ≥5mm are automatically marked. After the exploration is completed, the marked defective areas are filled and leveled using repair materials that are compatible with the road surface material. For asphalt pavement, cold-mixed asphalt or polymer-modified cement mortar is used, and for cement concrete pavement, epoxy mortar or polymer quick-drying cement mortar is used. After repair, the road surface flatness deviation is ≤2mm / m.

[0036] Step S2. Coating and Construction Selection: Select an all-weather long-lasting reflective road marking coating system and matching construction equipment according to the road grade and climate conditions, verify the coating composition and ratio, then mix the coating and seal the road to be constructed. It should be noted that in step S2: The supporting construction equipment includes: low-pressure airless spraying equipment, scraper or high-pressure airless spraying equipment, high-refractive-index glass microsphere synchronous spreading device, external directional magnetic field equipment, magnetic roller pressing equipment, RTK differential positioning base station, high-precision laser projection equipment and AR / VR auxiliary glasses. During the mixing process, component B of the coating and the curing agent are mixed on-site in proportion, and stirred with a stirrer at a speed of 200-300 r / min for 3-5 minutes until uniform. The mixed component B should be used within a 15-40 minute pot life.

[0037] Step S3. Marker layout and visual assistance: Step S3.1. Data import and calibration: Import the designed road marking data into the portable projection system, then set up a high-precision laser projection device in the construction area, and use known road reference points to locate the device and calibrate the image distortion. It should be noted that the road marking data in step S3.1 is a road traffic marking design file in CAD or BIM format, which includes the line type, width, spacing, position coordinates and radius of curvature parameters of lane lines, zebra crossings, guide arrows and text markings; The road reference point is at least one of the following: curbstone, existing road marking endpoint, road intersection, or a mixture of multiple points in any proportion; Step S3.2. Projection and boundary locking: Using a high-precision laser projection device, the outer contour boundary line, specific pattern filling area or center guide line of the marking are projected directly and without distortion onto the cleaned road surface with high-contrast visible light. During the projection process, adjustments and boundary locking are performed to ensure that the position, curvature and spacing of the marking meet the design requirements. It should be noted that the projection brightness and contrast of high-precision laser projection equipment can be adaptively adjusted according to the ambient light intensity, and the specific requirements are as follows: In strong light environments, the projection brightness is no less than 5000 lumens, and the projected visible light is a high-contrast green or red laser line. During the projection adjustment and boundary locking process: The width of the projection boundary line is ≤3mm, and the overall deviation between the projection pattern and the design drawing is ≤±2mm; Step S3.3. Equipment selection and construction preparation: After the projection is adjusted, select AR / VR auxiliary glasses to overlay and display the three-dimensional outline of the marking line, design thickness, travel speed deviation and construction boundary warning information in the field of vision, in preparation for subsequent visual coating; It should be noted that AR / VR assistive glasses are augmented reality smart glasses with spatial positioning capabilities, which overlay and display at least one of the following information or multiple information mixed in any proportion within their field of view in real time: The three-dimensional virtual model of the road markings, the recommended design thickness values ​​of each component A / B / C, the deviation between the current construction equipment speed and the design speed, the coating thickness warning threshold, and the construction boundary crossing warning information; The threshold values ​​for construction deviations are as follows: the coating thickness deviation threshold is set to ±10% of the design thickness, the travel speed deviation threshold is set to ±15% of the design speed, and the construction boundary crossing threshold is set to ≥5mm beyond the projected boundary line. When the construction deviation exceeds the set threshold, the AR / VR auxiliary glasses will issue an audible and visual alarm. The AR / VR auxiliary glasses have a built-in processing unit that uses the high-precision position signal obtained in real time by the RTK differential positioning base station to calculate the actual speed and position of the current construction equipment and compare it in real time with the predetermined speed and projection boundary coordinates imported from the design documents. When the deviation exceeds the set threshold, the audible and visual alarm will be triggered. The AR auxiliary glasses simultaneously receive the positioning signal from the projection device and enhance the brightness of the projection edges.

[0038] Step S4. Graded coating and marking construction: Pour the A, B and C components of the coating that have been mixed in step S2 into the coating equipment, and then strictly follow the order of A component → B component → C component to carry out three-level layer construction. The entire construction process is guided by the projected pattern and visual aids. It should be noted that the specific process parameters for the three-level layered construction are as follows: When applying the primer layer of component A: Apply using low-pressure airless spraying equipment at a pressure of 10-15 MPa. Hold the spray gun perpendicular to the road surface at a distance of 30-50 cm. Control the dry film thickness to 0.05-0.20 mm and the coating weight to 0.2-0.4 kg / m². 2 Allow to air dry for 5-15 minutes until surface dry after spraying. During the construction of the functional layer of component B: After component A is surface dry, component B is applied by scraping or high-pressure airless spraying, with the dry film thickness controlled at 0.3-2.0 mm. During the construction of the C-component protective layer: After component B has dried to the surface, component C is applied using low-pressure spraying equipment. The spraying pressure is 8-12 MPa, the spray gun is 30-40 cm away from the road surface, the dry film thickness is controlled at 0.05-0.20 mm, and the coating amount is 0.1-0.3 kg / m². 2 ; The total thickness of the three-layer dry film consisting of components A, B, and C is controlled between 0.5 and 2.5 mm.

[0039] Step S5. Drying and curing: After each layer of components in step S4 is coated, a drying process is carried out for a period of time. During the drying process, drying equipment can be used to assist drying according to the ambient temperature. It should be noted that the drying and curing conditions are as follows: Natural drying is suitable for environments with temperatures between 20-35℃ and relative humidity ≤70%, where: Surface drying time for component A is 5-15 minutes; Component B non-stick drying time is 10-30 minutes, and complete curing time is 20-60 minutes; The drying time for component C is 10-30 minutes, and component C is cured naturally at room temperature or with the assistance of hot air. During the drying and curing process, when the ambient temperature is below 15℃ or the relative humidity is above 70%, a hot air circulation heating device is used to blow hot air at 40-60℃ onto the marking surface for auxiliary drying, and the auxiliary drying time is 5-10 minutes.

[0040] Step S6. Quality Inspection and Record Delivery: Inspect the appearance, thickness, adhesion, retroreflective coefficient and anti-skid performance of the road markings, record the construction parameters and test data, and deliver the construction file for acceptance. It should be noted that: The specific items and pass / fail standards for quality inspection are as follows: (1) Marking appearance quality: The edges are neat, without burrs, bubbles, cracks, or peeling, and the width deviation of the marking is ≤ ±3mm; (2) Geometric dimensions: Total thickness of three-layer dry film is 1.0-2.5mm, and the edge regularity deviation is ≤1mm; (3) Adhesion: The adhesion was tested by the pull-out method and was ≥2.5MPa; (4) Anti-slip performance: Anti-slip pendulum value BPN≥50; (5) Optical performance: Dry retroreflection coefficient ≥ 500 mcd·m -2 ·lx -1 Retroreflection coefficient on rainy nights ≥300mcd·m -2 ·lx -1 .

[0041] Step S7. Post-maintenance and quality inspection: Regularly inspect the condition of the road markings. When the road markings show wear or reduced reflectivity, spray the D-component repair triggering liquid to activate the microcapsule foaming agent inside the road markings, causing the road markings to expand slightly. Then, use a magnetic roller pressing device to straighten and repair the road markings and restore their performance.

[0042] It should be noted that: The specific conditions for triggering the repair are as follows: When the inspection finds that the retroreflection coefficient of the road marking has decreased to less than 60% of the initial value, or the thickness of the road marking has been worn by more than 20%, or the edges are blurred and the regularity deviation is ≥3mm, the post-maintenance procedure will be initiated. During repair work: First, clean the surface of the road markings and let it dry. Then, use a low-pressure sprayer to evenly spray the D-component repair triggering liquid. The spraying amount is 50-150g / m² and the spraying pressure is 0.3-0.8MPa. Component D penetrates into the marking coating within 5-15 minutes, with a penetration depth ≥0.5mm, causing the marking coating to undergo slight volume expansion. The expansion rate is controlled at 10%-30%, and the thickness recovery rate reaches over 80%. Standardization and processing: Within 8-15 minutes after the D component is sprayed, a vehicle-mounted magnetic roller pressing device is used to straighten and repair the marking. The magnetic field strength of the magnetic roller pressing device is 0.1-0.5T, the roller pressing pressure is 0.1-0.3MPa, and the traveling speed is 3-8km / h, so that the edge regularity deviation of the marking is restored to ≤2mm. After the repair is completed, a follow-up inspection of the effect is required. The inspection indicators include: Retroreflection coefficient recovery rate ≥80%, marking thickness recovery rate ≥70%; After passing the re-inspection, the repair time, repair location, dosage of component D, and test data before and after the repair will be entered into the full life cycle maintenance file.

[0043] In one embodiment of the present invention, the construction method is applicable to asphalt pavement and cement concrete pavement. The ambient temperature during construction is controlled at 5℃-40℃, the relative humidity is ≤85%, the pavement temperature needs to be 3℃ higher than the dew point temperature, and construction should be avoided in rain, snow, fog, freezing, and winds with a force of ≥5.

[0044] Example 1: The general-purpose component A (primer) and component C (clear protective layer) are as follows: Component A (by weight): 46 parts of waterborne acrylic-epoxy hybrid resin emulsion (50% solids), 2 parts of silane coupling agent KH560, 0.8 parts of adhesion promoter, 3 parts of film-forming aid, 22 parts of 800-mesh heavy calcium carbonate, 9 parts of silica powder, 1.2 parts of additives, and 15 parts of deionized water. Dry film thickness after spraying: 60 μm. Component C (by weight): 65 parts aliphatic polyurethane acrylate transparent resin (transmittance ≥92%), 11 parts nano-alumina dispersion (30% solids content, 30nm), 1.5 parts UV absorber, 1.0 part light stabilizer, 1.0 part hydrophobic agent, 0.8 parts leveling agent and defoamer, and 15 parts diluent or deionized water. Dry film thickness after spraying: 80μm. Component B formulation (by mass): 40 parts methyl methacrylate prepolymer, 8 parts toughening resin (the toughening resin is a thermoplastic polyurethane elastomer or a core-shell structured acrylate copolymer), 2 parts crosslinking agent ethylene glycol dimethacrylate; 10 parts energy-storing luminescent powder, 6 parts core-shell magnetic porous microspheres (Fe3O4@SiO2, KH570 grafted, particle size 50μm, magnetic strength 55emu / g), 10 parts titanium dioxide, 16 parts heavy calcium carbonate, 5 parts quartz powder, 2 parts nano SiO2, 1.5 parts silane coupling agent, 0.5 parts dispersant, 0.3 parts anti-settling agent, 0.5 parts defoamer, and 4 parts microcapsule foaming agent (melamine resin / isopentane, foaming temperature 60℃). Apply 1.8 parts of benzoyl peroxide curing agent (based on 100 parts of the base resin), coat to a thickness of 0.6 mm, treat with a magnetic field of 0.5 T for 5 min, and sprinkle 0.4 kg / m² of high refractive index glass beads on the surface.

[0045] Example 2: Component B formulation: 14 parts luminescent powder, 10 parts core-shell microspheres, 6 parts foaming agent, and filler adjustment (12 parts heavy calcium carbonate and 5 parts quartz powder). The rest is the same as in Example 1, with a thickness of 0.6 mm.

[0046] Example 3: Component B formulation: 14 parts luminescent powder, 14 parts core-shell microspheres, 4 parts foaming agent, filler (10 parts heavy calcium carbonate, 5 parts quartz powder), 10 parts titanium dioxide, the rest are the same as above, thickness 1.2mm.

[0047] A performance comparison table of the embodiments can be obtained by comparing the embodiments, as shown below: Performance Comparison Table of Examples As can be seen from the table above, Example 3 is the best in terms of reflective durability, repair effect, anti-slip and luminous performance. Therefore, Example 3 is determined to be the best example.

[0048] Comparative Example 1: Traditional hot melt reflective lines Coating formulation (parts by weight): 18 parts petroleum resin (C5 / C9 copolymer), 2 parts ethylene-vinyl acetate copolymer (EVA), 1.5 parts polyethylene wax, 2 parts dioctyl phthalate plasticizer, 8 parts rutile titanium dioxide, 48 parts 800-mesh heavy calcium carbonate, 18 parts premixed glass beads (refractive index 1.5), 0.5 parts antioxidant, and 2 parts other additives.

[0049] Preparation process: Add resin, EVA, wax and plasticizer to the reactor, heat to 180-200℃ and stir to melt, cool to 160℃ and add titanium dioxide and calcium carbonate in sequence, stir and disperse for 30 minutes, cool to 130℃ and add premixed glass beads, stir at low speed for 5 minutes, discharge, cool and crush.

[0050] Construction process: After cleaning the road surface, apply a primer. Use a hot-melt marking machine to apply the primer at 180-220℃, with a coating thickness of 2.0mm. Simultaneously, sprinkle ordinary glass beads (refractive index 1.5, 30-60 mesh) onto the surface at a rate of 0.4kg / m². 2 .

[0051] Comparative Example 2: Conventional Waterborne Acrylic Road Marking Paint Coating formulation (parts by weight): 45 parts water-based acrylic emulsion (solid content 48%, Tg=25℃), 12 parts rutile titanium dioxide, 25 parts 800-mesh heavy calcium carbonate, 10 parts 400-mesh silica powder, 3 parts film-forming aid alcohol ester twelve, 0.8 parts dispersant sodium polycarboxylate, 0.3 parts defoamer, 0.5 parts anti-settling agent hydroxyethyl cellulose, and 3.4 parts deionized water.

[0052] Construction process: After road surface cleaning, apply airless spray coating with a wet film thickness of 0.5mm (dry film thickness approximately 0.25mm). Apply two coats, with a total dry film thickness of approximately 0.5mm. Top with ordinary glass beads (refractive index 1.5) at a rate of 0.3kg / m². 2 .

[0053] Comparative Example 3: Conventional Two-Component MMA Road Marking Paint Coating formulation (parts by weight): 42 parts MMA resin prepolymer, 10 parts rutile titanium dioxide, 30 parts 800 mesh heavy calcium carbonate, 10 parts 400 mesh quartz powder, 1 part dispersant, 0.5 parts defoamer, 0.5 parts anti-settling agent, and 1.8 parts BPO curing agent (external additive).

[0054] Application process: Mix components A and B on-site, apply by airless spraying, coating thickness 1.0mm, top-sprinkle with high-refractive-index glass beads (refractive index 1.9), application rate 0.4kg / m². 2 .

[0055] A comparison table of performance between the examples and comparative examples can be obtained through sampling experiments. Performance Comparison Table of Examples and Comparative Examples As shown in the table above, this invention, through the synergistic effect of the ABC three-layer functional separation structure, the magnetic-assisted polymerization of core-shell magnetic porous glass microspheres, the active luminescence of energy-storing luminescent powder coated with a double silicon film, and the in-situ micro-expansion repair technology of component D, significantly outperforms existing traditional road marking paint systems in terms of reflectivity and durability, all-weather visibility, anti-slip properties, adhesion, and overall economic efficiency.

[0056] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A long-lasting all-weather reflective marking paint, composed of four components A, B, C, and D, forming a marking system with gradient functional combinations, characterized in that: Component A is a primer component, and the composition of component A by mass parts is as follows: 40-50 parts of waterborne acrylic-epoxy hybrid resin emulsion or silicone-acrylic emulsion, 1.5-3 parts of silane coupling agent, 0.5-2 parts of penetrating wetting agent or adhesion promoter, 2-5 parts of film-forming aid, 15-30 parts of filler, 0.5-2 parts of additives, and 10-25 parts of deionized water; Component B is the main functional layer of the road marking, and is expressed in parts by weight as follows: 35-45 parts of methyl methacrylate prepolymer or epoxy-polyurethane composite resin; Dual-silicon film-coated modified SrAl2O4:Eu 2+ ,Dy 3+ 10-18 parts of energy-storing luminescent powder; 5-15 parts of core-shell magnetic porous glass microspheres; 4-12 parts of rutile titanium dioxide or natural mineral pigments; 15-30 parts of filler material; 1-3 parts of nano anti-aging agent; 1-3 parts of silane coupling agent, wherein the silane coupling agent is at least one of KH550, KH560, and KH570 or a mixture of multiple silane coupling agents in any proportion; The total amount of dispersant, anti-settling agent and defoamer is 0.5-2 parts, wherein the dispersant is a sodium polycarboxylate dispersant, the anti-settling agent is organobentonite or fumed silica, and the defoamer is an organosilicon defoamer; The microcapsule encapsulates 3-6 parts of a foaming agent, the capsule wall being at least one of urea-formaldehyde resin, melamine-formaldehyde resin, polyurethane or polymethyl methacrylate or a mixture of multiples in any proportion, and the core being a low-boiling-point alkane physical foaming agent. The curing agent, benzoyl peroxide, is used at a rate of 1.0%-2.5% of the total mass of all components in component B except the curing agent. It is added externally during construction. The C component is a transparent, wear-resistant surface layer, and is expressed in parts by weight as follows: The mixture comprises 55-75 parts of aliphatic polyurethane-silicone modified transparent resin or silicone modified acrylic transparent resin, 5-15 parts of nano wear-resistant filler, 1.5-3 parts of ultraviolet absorber and stabilizer, 0.5-1.5 parts of hydrophobic modifier, 0.5-1.5 parts of leveling agent and defoamer combined, and 10-30 parts of diluent or deionized water, wherein the diluent is at least one of butyl acetate and propylene glycol methyl ether acetate or a mixture of multiple types in any proportion; The D component, which is a post-repair triggering solution, is shown in the following mass fractions: 75-95 parts of aliphatic ester or fatty alcohol polyoxyethylene ether activator and penetrant mixture, 0.5-5 parts of thickening stabilizer, 1-5 parts of antifreeze or retarder, and 5-20 parts of deionized water; The thickening stabilizer is at least one of hydroxyethyl cellulose, hydroxypropyl methyl cellulose, or polyurethane associative thickener, or a mixture of multiple thickeners in any proportion; the antifreeze is propylene glycol; and the retarder is polyvinyl alcohol.

2. The all-weather long-lasting reflective coating according to claim 1, characterized in that: In component A: The solid content of the waterborne acrylic-epoxy hybrid resin emulsion or silicone-acrylic emulsion is 45%-55%, and its glass transition temperature is -20℃-30℃. The silane coupling agent is at least one of KH550, KH560, and KH570, or a mixture of multiple silanes in any proportion; The filler is at least one of heavy calcium carbonate, silica powder, talc powder or calcined kaolin or a mixture of multiple types in any proportion, with a particle size of 800-2000 mesh. The penetrating wetting agent is a polyether-modified polysiloxane wetting agent, the adhesion promoter is an epoxy phosphate ester or modified polyester adhesion promoter, and 2-5 parts of film-forming aid are film-forming aids. The film-forming aid is at least one of alcohol ester dodecyl, dipropylene glycol butyl ether, and diethylene glycol butyl ether, or a mixture of multiple types in any proportion. In component B: The mass ratio of the methyl methacrylate prepolymer or epoxy-polyurethane composite resin to the curing agent benzoyl peroxide is 100:1.0-100:2.5; It also includes a crosslinking agent, the amount of which is 1%-5% of the mass of the methyl methacrylate prepolymer or epoxy-polyurethane composite resin, and the crosslinking agent is selected from ethylene glycol dimethacrylate, trimethylolpropane triacrylate or divinylbenzene; The filler material is at least one of quartz powder, heavy calcium carbonate, talc powder, mica powder, silica powder or hollow ceramic microspheres, with a particle size of 200-1250 mesh. The natural mineral pigment is at least one of iron oxide red, iron oxide yellow, ultramarine, or ochre, with a weather resistance rating of ≥8. The nano anti-aging agent is at least one of nano SiO2, TiO2, ZnO or CeO2, with a particle size of 5-50 nm, and is modified by a silane coupling agent for surface hydrophobicity. In component C: The light transmittance of the aliphatic polyurethane-silicone modified transparent resin or the silicone modified acrylic transparent resin is ≥90%. The nano-wear-resistant filler is at least one of nano-alumina, zirconium oxide, silicon dioxide or diamond powder, with a particle size of 10-100 nm. The ultraviolet absorber is a benzotriazole or triazine derivative; the stabilizer is a hindered amine light stabilizer, and the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is 1:1 to 1:

2. The hydrophobic modifier is a fluorocarbon-modified polysiloxane or a long-chain alkylsilane. In component D: The mass ratio of the activator to the penetrant is 3:1-8:2; The activator is an aliphatic ester, selected from at least one of butyl acetate, ethyl propionate, ethyl lactate, propylene glycol methyl ether acetate, or propylene carbonate. The penetrant is a fatty alcohol polyoxyethylene ether, selected from at least one of JFC, AEO-3, AEO-5, AEO-7 or AEO-9; It also contains 0.5%-2% by weight of acid anhydride or sulfonic acid chemical foaming accelerators in the total mass of the activator and penetrant mixture.

3. The all-weather long-lasting reflective marking coating according to claim 2, characterized in that, The core-shell magnetic porous glass microspheres and the double-silica film-coated modified SrAl2O4:Eu in component B 2+ ,Dy 3+ The energy-storing luminescent powder and the microcapsule-encapsulated foaming agent are: The core-shell magnetic porous glass microspheres have a core-shell structure with Fe3O4 as the core and mesoporous SiO2 as the outer shell. The core particle size is 10 nm-10 μm, and the saturation magnetization is 30-120 emu / g. The outer shell thickness is 20-500 nm, the mesopore size is 2-50 nm, and the BET specific surface area is ≥400 m² / g. The overall particle size of the core-shell magnetic porous glass microspheres is 5-200 μm, the refractive index is 1.85-1.95, and its surface is modified by grafting with a silane coupling agent. The dual-silicon film coating modified SrAl2O4:Eu 2+ ,Dy 3+ The energy-storing luminescent powder has a double-layer coating structure with an inner inorganic silicon film and an outer organic silicon film. Its pH growth rate in aqueous dispersion is reduced by more than 60% compared with the unmodified luminescent powder. Its luminescence brightness is ≥190 mcd / m² after 10 min of excitation cessation and its afterglow time is ≥12 h. The microcapsules have a particle size of 5-100 μm, a foaming trigger temperature of 40-150℃, and a foaming volume expansion ratio of 1.1-30 times. The specific structure of the foaming agent encapsulated in the microcapsules is as follows: The capsule wall is made of urea-formaldehyde resin, melamine-formaldehyde resin, polyurethane, or polymethyl methacrylate. The core is a physical foaming agent.

4. The all-weather long-lasting reflective marking coating according to claim 3, characterized in that, The total dry film thickness of the three layers (components A, B, and C) is 0.5-2.5 mm, wherein: Component A has a layer thickness of 0.05-0.20 mm; Component B is stratified 0.3-2.0 mm; The C group has stratification of 0.05-0.20 mm.

5. A method for applying an all-weather, long-lasting reflective road marking coating, using the all-weather, long-lasting reflective road marking coating as described in any one of claims 1-5, characterized in that... Includes the following steps: Step S1. Road cleaning and visual inspection: Clean the road surface to ensure it is dry and clean, and use visual inspection equipment to scan the construction area, obtain road surface data, and mark the damaged areas; Step S2. Coating selection and construction preparation: Select the coating system and matching construction equipment, verify and mix the coating, and close the construction road at the same time; Step S3. Marking Layout and Visual Assistance: The designed marking data is projected directly and without distortion onto the road surface using a high-precision laser projection device for marking layout; and the three-dimensional outline of the marking, design thickness, and construction boundary warning information are overlaid and displayed in real time using AR / VR auxiliary glasses; Step S4. Graded coating and marking: Strictly follow the order of component A → component B → component C for three-level layering, and refer to the projected pattern and visual aids throughout the process; Step S5. Drying and curing: Each component layer is dried after application.

6. The method for applying an all-weather, long-lasting reflective marking coating according to claim 5, characterized in that, In step S1: The cleaning process is detailed below: A combination of high-pressure water jetting, vacuuming, and mechanical sweeping is used to clean the road surface, removing dust, oil, loose particles, and old road marking residue, ensuring the road surface is clean and dry with a moisture content of ≤8%. During visual exploration, drones or mobile inspection equipment equipped with 3D LiDAR and high-definition cameras are used to perform low-altitude scanning of the road section to be constructed. After acquiring data on road surface smoothness, slope, curvature of curves and residual status of old road markings, the data on road surface smoothness, slope, curvature of curves and residual status of old road markings are imported into modeling software. Through point cloud data registration and meshing processing, a digital twin model of the road surface in the construction area is constructed, and the location and size of cracks with a width ≥2mm or potholes with a depth ≥5mm are automatically marked. After the exploration is completed, the marked defective areas are filled and leveled using repair materials that are compatible with the road surface material. For asphalt pavement, cold-mixed asphalt or polymer-modified cement mortar is used, and for cement concrete pavement, epoxy mortar or polymer quick-drying cement mortar is used. After repair, the road surface flatness deviation is ≤2mm / m.

7. The method for applying an all-weather, long-lasting reflective marking coating according to claim 5, characterized in that, In step S2: The supporting construction equipment includes: low-pressure airless spraying equipment, scraper or high-pressure airless spraying equipment, high-refractive-index glass microsphere synchronous spreading device, external directional magnetic field equipment, magnetic roller pressing equipment, RTK differential positioning base station, high-precision laser projection equipment and AR / VR auxiliary glasses. During the mixing process, component B of the coating and the curing agent are mixed on-site in proportion, and stirred with a stirrer at a speed of 200-300 r / min for 3-5 minutes until uniform. The mixed component B should be used within a 15-40 minute pot life.

8. The method for applying an all-weather, long-lasting reflective road marking coating according to claim 5, characterized in that: Step S3 specifically includes: Step S3.

1. Data import and calibration: Import the designed road marking data into the portable projection system, then set up a high-precision laser projection device in the construction area, and use known road reference points to locate the device and calibrate the image distortion. Step S3.

2. Projection and boundary locking: Using a high-precision laser projection device, the outer contour boundary line, specific pattern filling area or center guide line of the marking are projected directly and without distortion onto the cleaned road surface with high-contrast visible light. During the projection process, adjustments and boundary locking are performed to ensure that the position, curvature and spacing of the marking meet the design requirements. Step S3.

3. Equipment selection and construction preparation: After the projection is adjusted, select AR / VR auxiliary glasses to overlay and display the three-dimensional outline of the marking line, design thickness, travel speed deviation and construction boundary warning information in the field of vision, in preparation for subsequent visual coating; In step S3: The road marking data in step S3.1 is a road traffic marking design file in CAD or BIM format, which includes the line type, width, spacing, position coordinates and radius of curvature parameters of lane lines, zebra crossings, guide arrows and text markings; The road reference point is at least one of the following: curbstone, existing road marking endpoint, road intersection, or a mixture of multiple points in any proportion; In step S3.2: The projection brightness and contrast of high-precision laser projection equipment can be adaptively adjusted according to the ambient light intensity, and the specific requirements are as follows: In strong light environments, the projection brightness should be no less than 5000 lumens, and the projected visible light should be a high-contrast green or red laser line. During the projection adjustment and boundary locking process: The width of the projection boundary line is ≤3mm, and the overall deviation between the projection pattern and the design drawing is ≤±2mm; In step S3.3: AR / VR assistive glasses are augmented reality smart glasses with spatial positioning capabilities, which overlay and display at least one of the following information or multiple information mixed in any proportion within their field of vision in real time: The three-dimensional virtual model of the road markings, the recommended design thickness values ​​of each component A / B / C, the deviation between the current construction equipment speed and the design speed, the coating thickness warning threshold, and the construction boundary crossing warning information; The threshold values ​​for construction deviations are as follows: the coating thickness deviation threshold is set to ±10% of the design thickness, the travel speed deviation threshold is set to ±15% of the design speed, and the construction boundary crossing threshold is set to ≥5mm beyond the projected boundary line. When the construction deviation exceeds the set threshold, the AR / VR auxiliary glasses will issue an audible and visual alarm. The AR / VR auxiliary glasses have a built-in processing unit that uses the high-precision position signal obtained in real time by the RTK differential positioning base station to calculate the actual speed and position of the current construction equipment and compare it in real time with the predetermined speed and projection boundary coordinates imported from the design documents. When the deviation exceeds the set threshold, the audible and visual alarm will be triggered. The AR auxiliary glasses simultaneously receive the positioning signal from the projection device and enhance the brightness of the projection edges.

9. The method for applying an all-weather, long-lasting reflective marking coating according to claim 5, characterized in that, In step S4: The specific process parameters for the three-level layered construction are as follows: When applying the primer layer of component A: Apply using low-pressure airless spraying equipment at a pressure of 10-15 MPa. Hold the spray gun perpendicular to the road surface at a distance of 30-50 cm. Control the dry film thickness to 0.05-0.20 mm and the coating weight to 0.2-0.4 kg / m². 2 Allow to air dry for 5-15 minutes until surface dry after spraying. During the construction of the functional layer of component B: After component A is surface dry, component B is applied by scraping or high-pressure airless spraying, with the dry film thickness controlled at 0.3-2.0 mm. During the construction of the C-component protective layer: After component B has dried to the surface, component C is applied using low-pressure spraying equipment. The spraying pressure is 8-12 MPa, the spray gun is 30-40 cm away from the road surface, the dry film thickness is controlled at 0.05-0.20 mm, and the coating amount is 0.1-0.3 kg / m². 2 ; The total thickness of the three-layer dry film consisting of components A, B, and C is controlled between 0.5 and 2.5 mm. The drying and curing conditions in step S5 are as follows: Natural drying is suitable for environments with temperatures between 20-35℃ and relative humidity ≤70%, where: Surface drying time for component A is 5-15 minutes; Component B non-stick drying time is 10-30 minutes, and complete curing time is 20-60 minutes; The drying time for component C is 10-30 minutes, and component C is cured naturally at room temperature or with the assistance of hot air. During the drying and curing process, when the ambient temperature is below 15℃ or the relative humidity is above 70%, a hot air circulation heating device is used to blow hot air at 40-60℃ onto the marking surface for auxiliary drying, and the auxiliary drying time is 5-10 minutes. In step S7: The specific conditions for triggering the repair are as follows: When the inspection finds that the retroreflection coefficient of the road marking has decreased to less than 60% of the initial value, or the thickness of the road marking has been worn by more than 20%, or the edges are blurred and the regularity deviation is ≥3mm, the post-maintenance procedure will be initiated. During repair work: First, clean the surface of the road markings and let it dry. Then, use a low-pressure sprayer to evenly spray the D-component repair triggering liquid. The spraying amount is 50-150g / m² and the spraying pressure is 0.3-0.8MPa. Component D penetrates into the marking coating within 5-15 minutes, with a penetration depth ≥0.5mm, causing the marking coating to undergo slight volume expansion. The expansion rate is controlled at 10%-30%, and the thickness recovery rate reaches over 80%. Standardization and processing: Within 8-15 minutes after the D component is sprayed, a vehicle-mounted magnetic roller pressing device is used to straighten and repair the markings. The magnetic field strength of the magnetic roller pressing device is 0.1-0.5T, the roller pressing pressure is 0.1-0.3MPa, and the traveling speed is 3-8km / h, so that the edge regularity deviation of the markings is restored to ≤2mm.

10. The method for applying an all-weather, long-lasting reflective marking coating according to claim 5, characterized in that, Also includes: Step S6. Quality Inspection and Record Delivery: Inspect the appearance, thickness, adhesion, retroreflective coefficient and anti-skid performance of the road markings, record the construction parameters and test data, and deliver the construction file for acceptance. Step S7. Post-maintenance and quality inspection: Regularly inspect the condition of the road markings. When the road markings show wear or reduced reflectivity, spray the D-component repair triggering liquid to activate the microcapsule foaming agent inside the road markings, causing the road markings to expand slightly. Then, use a magnetic roller pressing device to straighten and repair the road markings and restore their performance.

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