A water-dispersible energy-storing light-emitting type tunnel waistline coating and a preparation method thereof

Abstract

The present application relates to a kind of water dispersion energy storage luminous type tunnel waist line paint and its preparation method, it is related to paint technical field, by weight parts, the water dispersion energy storage luminous type tunnel waist line paint includes following components: water-based emulsion 35~45 parts, cement 90~105 parts, modified expanded graphite powder 15~20 parts, flame retardant 20~30 parts, luminous substance 5~10 parts, curing agent 2~5 parts and water 15~20 parts.Based on the existing tunnel water-based paint ingredient system, the present application introduces specific compound water-based emulsion and modified expanded graphite powder, each component synergistically, not only improves the fireproof and heat insulation effect and freeze-thaw cycle performance of coating, enhances the stability of coating system, without additional coating additive, while having good luminous effect, can improve the light environment in tunnel, can be widely applied in such as highway tunnel and other types of dark environment, improve the safety of highway tunnel.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a water-dispersible energy-storing luminescent tunnel waistline coating and its preparation method. Background Technology

[0002] In highway transportation infrastructure construction, highway tunnels, as key projects traversing mountains or obstacles, play a crucial role in ensuring the safety and comfort of their internal environment. The relatively enclosed and dimly lit interiors of tunnels pose a significant threat to safety and structural integrity in the event of emergencies such as fires. The rapid spread of fire, coupled with high temperatures and dense smoke, can severely impede evacuation and rescue efforts. Therefore, improving the fire-resistant and heat-insulating properties of highway tunnel coatings, as well as their visibility in dark environments, is of paramount importance for ensuring the safe operation of tunnels.

[0003] Although there are various highway tunnel coating products on the market, their performance mainly suffers from the following shortcomings: 1. In terms of fire prevention and heat insulation, some water-based coatings only add conventional flame retardants. Although they can delay combustion to a certain extent, their heat insulation effect is limited and they cannot effectively prevent heat from being transferred to the tunnel structure during a fire, making it difficult to meet the high standards of fire safety requirements for highway tunnels.

[0004] 2. In terms of freeze-thaw cycle resistance, the compatibility and stability of the components in water-based coating systems are poor. After multiple freeze-thaw cycles, the internal structure of the coating is easily damaged, resulting in problems such as peeling and powdering of the coating. This not only affects the protective effect and aesthetics, but also shortens the service life of the tunnel, and may even cause serious accidents such as tunnel collapse.

[0005] 3. Regarding the stability of the coating system, in order to improve stability, it is often necessary to add a variety of additives such as dispersants, defoamers, and thickeners. This not only increases the cost of the coating, but may also introduce new impurities, which will have an adverse effect on the environmental performance of the coating.

[0006] 4. Current tunnel coatings also face challenges in improving visibility in dark tunnel environments. While some coatings incorporate reflective materials, the reflective effect is weakened by dense smoke and darkness during a fire, failing to provide continuous and effective visual guidance. Furthermore, changes in light intensity at tunnel entrances and exits can easily create "black holes" and "white holes," posing a safety hazard to drivers. Additionally, self-luminous tunnel coatings are scarce, and existing self-luminous coatings often fail to meet practical requirements in terms of brightness and duration of illumination.

[0007] Given the shortcomings of existing water-based coatings for highway tunnels in terms of fire resistance, heat insulation, system stability, and self-luminescence properties, it is of great practical significance to develop a water-based coating for highway tunnels that has excellent fire resistance and heat insulation effects, good system stability, and reliable self-luminescence properties. Summary of the Invention

[0008] To address the above problems, this invention provides a water-dispersible energy-storing luminescent tunnel waistline coating and its preparation method.

[0009] In a first aspect, the present invention provides a water-dispersible energy-storing and luminescent tunnel waistline coating, wherein the water-dispersible energy-storing and luminescent tunnel waistline coating comprises the following components in parts by weight: The mixture consists of 35-45 parts of water-based emulsion, 90-105 parts of cement, 15-20 parts of modified expanded graphite powder, 20-30 parts of flame retardant, 5-10 parts of luminescent material, 2-5 parts of curing agent, and 15-20 parts of water. The aqueous emulsion is obtained by compounding an acrylate-methacrylate copolymer emulsion, an aqueous polyurethane dispersion, and an aqueous epoxy resin dispersion in a weight ratio of (65~75):(15~20):(10~15). The modified expanded graphite powder is obtained by treating expanded graphite powder with oxygen-enriched microwave plasma.

[0010] Furthermore, by weight, the water-dispersible energy-storing luminescent tunnel waistline coating comprises the following components: The mixture consists of 40 parts water-based emulsion, 100 parts cement, 18 parts modified expanded graphite powder, 25 parts flame retardant, 8 parts luminescent material, 3.5 parts curing agent, and 17 parts water.

[0011] Furthermore, the method for preparing the aqueous emulsion includes the following steps: At room temperature, the acrylate-methacrylate copolymer emulsion is added to a premixing tank and stirred at 200-300 rpm. Then, the aqueous polyurethane dispersion and aqueous epoxy resin dispersion are slowly added and stirred for 15-20 minutes. Finally, the emulsifier is added, and the stirring speed is increased to 300-400 rpm and stirred for 30-40 minutes to obtain the premix. The premixed material is added to a high-speed shearing machine for shearing at a speed of 2000-3000 rpm for 20-30 minutes to obtain the aqueous emulsion.

[0012] Furthermore, the emulsifier is composed of Span 80, AEO-9 and Tween 80 in a weight ratio of 1:2:1, and the amount of the emulsifier added accounts for 1% to 2.5% of the weight percentage of the premix.

[0013] Furthermore, the weight ratio of the acrylate-methacrylate copolymer emulsion, the aqueous polyurethane dispersion, and the aqueous epoxy resin dispersion is 70:17:13.

[0014] Furthermore, the oxygen-rich microwave plasma treatment step includes the following process: Expanded graphite powder was placed in a microwave plasma processor, and oxygen and argon gas with a volume ratio of 6:1 were introduced as the working medium. Glow discharge treatment was performed for 90 to 120 seconds under the conditions of microwave power of 400 to 500 W and gas flow rate of 80 to 90 mL / min. Oxygen was then introduced for another 5 to 10 minutes to obtain the modified expanded graphite powder.

[0015] Furthermore, the acrylate-methacrylate copolymer emulsion includes BASF's product model Acronal. ® 7015, the aqueous polyurethane dispersion includes Covestro's product model Bayhydrol ® U XP 2750, the waterborne epoxy resin dispersion includes Hansen's product model EPI-REZ™6520-WH-53, the cement includes at least one of silicate cement and sulfoaluminate cement, and the luminescent material includes europium strontium aluminate powder.

[0016] Furthermore, the flame retardant is composed of aluminum hydroxide and ammonium polyphosphate in a weight ratio of (1~2):1.

[0017] Furthermore, the curing agent is composed of divinyltriamine and dimethylaminopropylamine in a weight ratio of (2~3):1.

[0018] Secondly, based on the same inventive concept, the present invention provides a method for preparing the water-dispersible energy-storing luminescent tunnel waistline coating as described in any one of the first aspects, the preparation method comprising the following steps: The luminescent material is mixed with water, which accounts for 1 / 2 to 2 / 3 of the total weight, to obtain the luminescent paste. The curing agent and the remaining water are mixed to obtain an aqueous solution of the curing agent; Cement, modified expanded graphite powder and flame retardant are mixed evenly to obtain dry mix; The aqueous emulsion and the luminescent paste are added to the dry mixture and mixed evenly, and then the curing agent aqueous solution is added and mixed evenly to obtain the water-dispersed energy storage luminescent tunnel waistline coating.

[0019] The technical solutions provided in the embodiments of the present invention have at least the following advantages compared with the prior art: This invention provides a water-dispersible, energy-storing, luminescent tunnel waistline coating and its preparation method. Based on the existing water-based coating formulation system for tunnels, this invention introduces a specific compounded water-based emulsion and modified expanded graphite powder. The components synergistically enhance each other, improving not only the fireproof and heat-insulating effects and freeze-thaw cycle resistance of the coating, but also enhancing the stability of the coating system. No additional coating additives are required. Furthermore, it exhibits excellent luminescent effects, improving the light environment inside tunnels. It can be widely applied in various dark environments such as highway tunnels, enhancing the safety of highway tunnels.

[0020] Specifically, the functions of each main component in this invention are as follows: Aqueous Emulsion: The aqueous emulsion of this invention uses an acrylate-methacrylate copolymer emulsion as the core film-forming substance. Its molecular structure contains functional groups such as ester groups, which can form a tight molecular chain structure during the film-forming process, providing a basic protective film for the coating and preventing external moisture, oxygen, etc. from eroding the tunnel wall. It is also compounded with an appropriate ratio of aqueous polyurethane dispersion and aqueous epoxy resin dispersion to enhance the cohesiveness of the coating film and the adhesion between the coating and the substrate (such as the tunnel inner wall). At the same time, it gives the coating a certain degree of elasticity, enabling it to adapt to possible minor deformations of the tunnel wall and improve the compatibility and freeze-thaw cycle resistance of the coating system, providing a basic guarantee for the overall performance of the coating.

[0021] Cement: Cement acts as a skeleton and filler in coatings. When cement comes into contact with water, it undergoes a hydration reaction, forming hard hydration products that increase the hardness and strength of the coating. At the same time, the porous structure of cement can adsorb other components, making the coating system more uniform and stable. Because cement itself has a certain degree of high-temperature resistance, it can help improve the fire resistance of the coating.

[0022] Modified expanded graphite powder: Modified expanded graphite powder is obtained by treating expanded graphite powder with oxygen-enriched microwave plasma. Expanded graphite powder expands rapidly at high temperatures, forming a loose, porous carbon layer structure. Oxygen-enriched microwave plasma treatment further improves the surface properties and chemical activity of the expanded graphite powder, allowing it to disperse better in coatings and expand more quickly in the event of a fire. This expanded carbon layer acts as a heat and oxygen barrier, preventing heat and oxygen from being transferred to the tunnel walls, thereby improving the fireproof and heat-insulating effect of the coating.

[0023] Flame retardant: In this coating system, the flame retardant and modified expanded graphite powder work synergistically. When the temperature rises, the flame retardant decomposes and absorbs heat, reducing the system temperature. At the same time, it generates non-combustible gas to dilute the oxygen concentration, while the modified expanded graphite powder expands to form a heat insulation layer, thus improving the fire resistance of the coating.

[0024] Luminescent material: When the coating provided by this invention is applied to the entrance and exit sections of a tunnel, the luminescent material absorbs external energy (such as sunlight and light energy from vehicle headlights), stores the energy, and then releases it as light in the dark. In dark environments such as highway tunnels, the luminescent material can provide drivers with certain visual guidance, thereby improving driving safety.

[0025] Hardener: Promotes the curing reaction of the coating. After coating application, the hardener reacts chemically with components such as water-based emulsions and cement, allowing the coating to quickly form a solid film. The addition of a hardener can shorten the drying time of the coating, improve its early strength and hardness, and ensure that the coating can be used as soon as possible. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0028] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Experimental methods in the following embodiments, unless otherwise specified, are generally performed according to national standards. If no corresponding national standard exists, then generally accepted international standards, conventional conditions, or conditions recommended by the manufacturer are followed.

[0029] The main raw material information involved in the embodiments and comparative examples of this invention is as follows: The acrylate-methacrylate copolymer emulsion was selected from BASF's product model Acronal. ® 7015.

[0030] The waterborne polyurethane dispersion is selected from Covestro's product model Bayhydrol. ® U XP 2750.

[0031] The waterborne epoxy resin dispersion is selected from Hansen's product model EPI-REZ™6520-WH-53.

[0032] The cement is selected from PO42.5 grade ordinary Portland cement.

[0033] The particle size of the expanded graphite powder is 80 mesh.

[0034] The particle size of aluminum hydroxide is 80 mesh.

[0035] The CAS number for ammonium polyphosphate is 68333-79-9.

[0036] The particle size of europium strontium aluminate powder is 50 mesh.

[0037] The CAS number for divinyltriamine is 111-40-0.

[0038] The CAS number for dimethylaminopropylamine is 109-55-7.

[0039] Span 80 is known in Chinese as sorbitan monooleate, and its CAS number is 1338-43-8.

[0040] The Chinese name for AEO-9 is fatty alcohol polyoxyethylene ether, and its CAS number is 68439-50-9.

[0041] The Chinese name for Tween 80 is polyoxyethylene sorbitan monooleate, and its CAS number is 9005-65-6. Example

[0042] This example provides a water-dispersible energy-storing and luminescent tunnel waistline coating, which, by weight, comprises the following components: The mixture consists of 40 parts water-based emulsion, 100 parts cement, 18 parts modified expanded graphite powder, 25 parts flame retardant, 8 parts luminescent material, 3.5 parts curing agent, and 17 parts water. The aqueous emulsion is obtained by compounding an acrylate-methacrylate copolymer emulsion, an aqueous polyurethane dispersion, and an aqueous epoxy resin dispersion in a weight ratio of 70:17:13. Its preparation method includes the following steps: At room temperature, the acrylate-methacrylate copolymer emulsion is added to a premixing tank and stirred at 260 rpm. Then, the aqueous polyurethane dispersion and the aqueous epoxy resin dispersion are slowly added, and stirring continues for 18 minutes. Finally, an emulsifier composed of Span 80, AEO-9, and Tween 80 in a weight ratio of 1:2:1 is added, wherein the amount of emulsifier added accounts for 2% of the weight percentage of the premix. The stirring speed is increased to 350 rpm, and stirring is carried out for 25 minutes to obtain a premix. The premix is ​​then added to a high-speed shear mill for shearing at a shearing speed of 2400 rpm for 25 minutes to obtain the aqueous emulsion. The modified expanded graphite powder is obtained by treating expanded graphite powder with oxygen-enriched microwave plasma. The preparation method includes the following process: the expanded graphite powder is placed in a microwave plasma treatment instrument, and oxygen and argon with a volume ratio of 6:1 are introduced as the working medium. Glow discharge treatment is performed for 100 seconds under the conditions of microwave power of 460W and gas flow rate of 85 mL / min. Then, oxygen is introduced for another 8 minutes to obtain the modified expanded graphite powder. The flame retardant is composed of aluminum hydroxide and ammonium polyphosphate in a weight ratio of 1.5:1; The curing agent is composed of divinyltriamine and dimethylaminopropylamine in a weight ratio of 2.5:1; The luminescent material is europium strontium aluminate powder.

[0043] The preparation method of the above-mentioned water-dispersible energy storage and luminescent tunnel waistline coating includes the following steps: The luminescent material is mixed with water, which accounts for 1 / 2 to 2 / 3 of the total weight, to obtain the luminescent paste. The curing agent and the remaining water are mixed to obtain an aqueous solution of the curing agent; Cement, modified expanded graphite powder and flame retardant are mixed evenly to obtain dry mix; The aqueous emulsion and the luminescent paste are added to the dry mixture and mixed evenly, and then the curing agent aqueous solution is added and mixed evenly to obtain the water-dispersed energy storage luminescent tunnel waistline coating. Example

[0044] This example provides a water-dispersible energy-storing and luminescent tunnel waistline coating, which, by weight, comprises the following components: The mixture consists of 35 parts water-based emulsion, 90 parts cement, 15 parts modified expanded graphite powder, 20 parts flame retardant, 5 parts luminescent material, 2 parts curing agent, and 15 parts water. The aqueous emulsion is obtained by compounding an acrylate-methacrylate copolymer emulsion, an aqueous polyurethane dispersion, and an aqueous epoxy resin dispersion in a weight ratio of 65:20:15. Its preparation method includes the following steps: At room temperature, the acrylate-methacrylate copolymer emulsion is added to a premixing tank and stirred at 260 rpm. Then, the aqueous polyurethane dispersion and the aqueous epoxy resin dispersion are slowly added, and stirring continues for 18 minutes. Finally, an emulsifier composed of Span 80, AEO-9, and Tween 80 in a weight ratio of 1:2:1 is added, with the emulsifier accounting for 2% of the weight percentage of the premix. The stirring speed is increased to 350 rpm, and stirring is continued for 25 minutes to obtain the premix. The premix is ​​then added to a high-speed shear mill for shearing at a shearing speed of 2000 rpm for 25 minutes to obtain the aqueous emulsion. The modified expanded graphite powder is obtained by treating expanded graphite powder with oxygen-enriched microwave plasma. The preparation method includes the following process: the expanded graphite powder is placed in a microwave plasma treatment instrument, and oxygen and argon with a volume ratio of 6:1 are introduced as working medium. Glow discharge treatment is performed for 120 seconds under the conditions of microwave power of 400W and gas flow rate of 90 mL / min. Then, oxygen is introduced for another 10 minutes to obtain the modified expanded graphite powder. The flame retardant is composed of aluminum hydroxide and ammonium polyphosphate in a weight ratio of 1:1; The curing agent is composed of divinyltriamine and dimethylaminopropylamine in a weight ratio of 2:1; The luminescent material is europium strontium aluminate powder.

[0045] The preparation method of the above-mentioned water-dispersible energy storage luminescent tunnel waistline coating is the same as that in Example 1. Example

[0046] This example provides a water-dispersible energy-storing and luminescent tunnel waistline coating, which, by weight, comprises the following components: The mixture consists of 45 parts water-based emulsion, 105 parts cement, 20 parts modified expanded graphite powder, 30 parts flame retardant, 10 parts luminescent material, 5 parts curing agent, and 20 parts water. The aqueous emulsion is obtained by compounding an acrylate-methacrylate copolymer emulsion, an aqueous polyurethane dispersion, and an aqueous epoxy resin dispersion in a weight ratio of 75:15:10. Its preparation method includes the following steps: At room temperature, the acrylate-methacrylate copolymer emulsion is added to a premixing tank and stirred at 260 rpm. Then, the aqueous polyurethane dispersion and the aqueous epoxy resin dispersion are slowly added, and stirring continues for 18 minutes. Finally, an emulsifier composed of Span 80, AEO-9, and Tween 80 in a weight ratio of 1:2:1 is added, wherein the amount of emulsifier added accounts for 2% of the weight percentage of the premix. The stirring speed is increased to 350 rpm, and stirring is carried out for 25 minutes to obtain the premix. The premix is ​​then added to a high-speed shear mill for shearing at a shearing speed of 3000 rpm for 25 minutes to obtain the aqueous emulsion. The modified expanded graphite powder is obtained by treating expanded graphite powder with oxygen-enriched microwave plasma. The preparation method includes the following process: the expanded graphite powder is placed in a microwave plasma treatment instrument, and oxygen and argon with a volume ratio of 6:1 are introduced as working medium. Glow discharge treatment is performed for 120 seconds under the conditions of microwave power of 400W and gas flow rate of 90 mL / min. Then, oxygen is introduced for another 10 minutes to obtain the modified expanded graphite powder. The flame retardant is composed of aluminum hydroxide and ammonium polyphosphate in a weight ratio of 2:1; The curing agent is composed of divinyltriamine and dimethylaminopropylamine in a weight ratio of 3:1; The luminescent material is europium strontium aluminate powder.

[0047] The preparation method of the above-mentioned water-dispersible energy storage luminescent tunnel waistline coating is the same as that in Example 1.

[0048] Comparative Example 1 This example provides a water-dispersible energy-storing luminescent tunnel waistline coating and its preparation method. The only difference from Example 1 is that the water-based emulsion is obtained by compounding an acrylate-methacrylate copolymer emulsion, a water-based polyurethane dispersion, and a water-based epoxy resin dispersion in a weight ratio of 50:25:25 (i.e., adjusting the compounding ratio in the water-based emulsion); the remaining steps and parameters are the same.

[0049] Comparative Example 2 This example provides a water-dispersible energy-storing luminescent tunnel waistline coating and its preparation method. The only difference from Example 1 is that the expanded graphite powder is not subjected to oxygen-enriched microwave plasma treatment (i.e., the expanded graphite powder raw material in Example 1 is directly used to replace the modified expanded graphite powder); the other steps and parameters are the same.

[0050] Test case In this example, the performance of the water-dispersible energy storage luminescent tunnel waistline coatings obtained in the above embodiments and comparative examples was tested according to existing testing methods such as GB 28375-2012 "Fireproof Coatings for Concrete Structures" and JG / T 446-2014 "Luminescence Performance Test Method". The coating thickness was 8 mm. The test results are shown in Tables 1 and 2 below. Note: In Table 1, the coating is considered qualified if it does not crack, peel, or fall off after 30 freeze-thaw cycles; otherwise, it is considered unqualified.

[0051] Table 1. Test results of fireproof and heat insulation effects and freeze-thaw cycle resistance of Examples 1-3 and Comparative Examples 1-2

[0052] Table 2. Test results of luminescence effect in Examples 1-3

[0053] As shown in Tables 1 and 2, compared with Comparative Examples 1-2, the water-dispersible energy-storing luminescent tunnel waistline coatings provided in Examples 1-3 of this invention exhibit superior fireproofing, heat insulation, and freeze-thaw cycle resistance. Simultaneously, they possess excellent luminescent properties, improving the lighting environment within tunnels. Furthermore, the water-dispersible energy-storing luminescent tunnel waistline coatings provided in these embodiments demonstrate a bonding strength exceeding 0.45 MPa, exhibiting good adhesion to the substrate. Their water resistance, acid resistance, alkali resistance, and freeze-thaw cycle resistance all meet requirements, making them widely applicable in various dark environments such as highway tunnels, thereby enhancing the safety of highway tunnels.

[0054] Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a hard limitation on the scope of the invention; therefore, it should be considered that the range description has specifically disclosed all possible subranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Furthermore, whenever a numerical range is referred to herein, it means including any referenced number (fraction or integer) within the range referred to.

[0055] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A water-dispersible, energy-storing, luminescent tunnel waistline coating, characterized in that, The water-dispersible energy-storing luminescent tunnel waistline coating comprises the following components by weight: The mixture consists of 35-45 parts of water-based emulsion, 90-105 parts of cement, 15-20 parts of modified expanded graphite powder, 20-30 parts of flame retardant, 5-10 parts of luminescent material, 2-5 parts of curing agent, and 15-20 parts of water. The aqueous emulsion is obtained by compounding an acrylate-methacrylate copolymer emulsion, an aqueous polyurethane dispersion, and an aqueous epoxy resin dispersion in a weight ratio of (65~75):(15~20):(10~15). The modified expanded graphite powder is obtained by treating expanded graphite powder with oxygen-enriched microwave plasma. The oxygen-enriched microwave plasma treatment process includes the following steps: Expanded graphite powder was placed in a microwave plasma processor, and oxygen and argon gas with a volume ratio of 6:1 were introduced as the working medium. Glow discharge treatment was performed for 90 to 120 seconds under the conditions of microwave power of 400 to 500 W and gas flow rate of 80 to 90 mL / min. Oxygen was then introduced for another 5 to 10 minutes to obtain the modified expanded graphite powder.

2. The water-dispersible, energy-storing, luminescent tunnel waistline coating according to claim 1, characterized in that, The water-dispersible energy-storing luminescent tunnel waistline coating comprises the following components by weight: The mixture consists of 40 parts water-based emulsion, 100 parts cement, 18 parts modified expanded graphite powder, 25 parts flame retardant, 8 parts luminescent material, 3.5 parts curing agent, and 17 parts water.

3. The water-dispersible, energy-storing, luminescent tunnel waistline coating according to claim 1, characterized in that, The method for preparing the aqueous emulsion includes the following steps: At room temperature, the acrylate-methacrylate copolymer emulsion is added to a premixing tank and stirred at 200-300 rpm. Then, the aqueous polyurethane dispersion and aqueous epoxy resin dispersion are slowly added and stirred for 15-20 minutes. Finally, the emulsifier is added, and the stirring speed is increased to 300-400 rpm and stirred for 30-40 minutes to obtain the premix. The premixed material is added to a high-speed shearing machine for shearing at a speed of 2000-3000 rpm for 20-30 minutes to obtain the aqueous emulsion.

4. The water-dispersible, energy-storing, luminescent tunnel waistline coating according to claim 3, characterized in that, The emulsifier is composed of Span 80, AEO-9 and Tween 80 in a weight ratio of 1:2:1, and the amount of the emulsifier added accounts for 1% to 2.5% of the weight of the premix.

5. The water-dispersible energy-storing luminescent tunnel waistline coating according to claim 3, characterized in that, The weight ratio of the acrylate-methacrylate copolymer emulsion, the aqueous polyurethane dispersion, and the aqueous epoxy resin dispersion is 70:17:

13.

6. The water-dispersible, energy-storing, luminescent tunnel waistline coating according to claim 1, characterized in that, The acrylate-methacrylate copolymer emulsion includes BASF's Acronal... ® 7015, the aqueous polyurethane dispersion includes Covestro's Bayhydrol ® U XP 2750, wherein the aqueous epoxy resin dispersion comprises Hansen's EPI-REZ™6520-WH-53, the cement comprises at least one of silicate cement and sulfoaluminate cement, and the luminescent material comprises europium strontium aluminate powder.

7. The water-dispersible, energy-storing, luminescent tunnel waistline coating according to claim 1, characterized in that, The flame retardant is composed of aluminum hydroxide and ammonium polyphosphate in a weight ratio of (1~2):

1.

8. The water-dispersible, energy-storing, luminescent tunnel waistline coating according to claim 1, characterized in that, The curing agent is composed of divinyltriamine and dimethylaminopropylamine in a weight ratio of (2~3):

1.

9. A method for preparing a water-dispersible, energy-storing, luminescent tunnel waistline coating according to any one of claims 1 to 8, characterized in that, The preparation method of the water-dispersible energy-storing luminescent tunnel waistline coating includes the following steps: The luminescent material is mixed with water, which accounts for 1 / 2 to 2 / 3 of the total weight, to obtain the luminescent paste. The curing agent and the remaining water are mixed to obtain an aqueous solution of the curing agent; Cement, modified expanded graphite powder and flame retardant are mixed evenly to obtain dry mix; The aqueous emulsion and the luminescent paste are added to the dry mixture and mixed evenly, and then the curing agent aqueous solution is added and mixed evenly to obtain the water-dispersed energy storage luminescent tunnel waistline coating.

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