A colored pavement coating with reflective heat insulation function and its preparation method

Abstract

The application relates to the field of color pavement materials, and particularly discloses a color pavement paint with a reflection and heat insulation function and a preparation method thereof. The color pavement paint with the reflection and heat insulation function is composed of A component, B component and C component, and the weight ratio of the A component, the B component and the C component is 1:(2-4):(10-15). The A component comprises the following raw materials: a curing agent, a dispersing agent, a wetting agent, a water reducing agent, a leveling agent, a defoaming agent, a thickening agent and a reflection and heat insulation pigment. The B component is a water-based EVU emulsion, and the water-based EVU emulsion is a mixture of a styrene modified hydroxyl acrylic emulsion and a water-based acrylic acid epoxy hybrid emulsion. The C component comprises colored sand, and the mass ratio of the colored sand and the reflection and heat insulation pigment is (50-80):(10-40). The color pavement paint prepared by the application has good reflection and heat insulation performance, and the coating has good adhesion, wear resistance and anti-cracking performance.

Description

Technical Field

[0001] This application relates to the field of colored pavement materials, and more specifically, to a colored pavement coating with reflective heat insulation function and a method for preparing the same. Background Technology

[0002] Colored pavements beautify the environment and protect the ground for durability. Water-based EAU colored coatings are commonly used in colored pavements to improve their physical properties. Water-based EAU technology is an eco-friendly, environmentally friendly water-based acrylic crosslinking technology. It has no irritating odor, no harmful emissions, and extremely low VOCs. The entire process of production, transportation, storage, construction, and use is safe and environmentally friendly. The base adhesive system is composed primarily of interpenetrating network composite water-based pure acrylic resin, featuring high environmental friendliness, high weather resistance, and high adhesion.

[0003] However, existing colored pavements easily absorb solar radiation heat, causing the pavement temperature to rise, which in turn leads to energy consumption issues for vehicles due to cooling. Traditional processes mainly use hollow glass microspheres and solid ceramic microspheres added to water-based EAU colored pavements to reduce surface temperature. However, hollow glass microspheres and solid ceramic microspheres have limited reflective and heat insulation properties for solar radiation and cannot reduce heat conduction. At the same time, if a large amount of microsphere filler is added, the bonding force between the coating and the pavement can be problematic, leading to cracking. Summary of the Invention

[0004] In order to improve the reflective heat insulation effect and crack resistance of road coatings, this application provides a colored road coating with reflective heat insulation function and its preparation method.

[0005] Firstly, this application provides a colored pavement coating with reflective heat insulation function, employing the following technical solution:

[0006] A colored pavement coating with reflective heat insulation function comprises component A, component B, and component C, wherein the weight ratio of component A, component B, and component C is 1:(2-4):(10-15). Component A comprises the following raw materials: curing agent, dispersant, wetting agent, water-reducing agent, leveling agent, defoamer, thickener, and reflective heat insulation pigment. The mass ratio of the curing agent, dispersant, wetting agent, water-reducing agent, leveling agent, defoamer, thickener, and reflective heat insulation pigment is (20-44):(1-3):(0.5-1.5):(0.8-1.5):(0.8-1.5):(0.5-0.7):(0.5-1.5):(10-40).

[0007] Component B is an aqueous EVU emulsion, which is a mixture of styrene-modified hydroxy acrylic emulsion and aqueous acrylic epoxy hybrid emulsion; Component C includes colored sand.

[0008] By adopting the above technical solutions, the use of reflective heat-insulating pigments can improve the reflective heat-insulating effect of coatings. Combining reflective heat-insulating pigments with waterborne EVU emulsions, styrene-modified hydroxy acrylic emulsions, and waterborne acrylic-epoxy hybrid emulsions can improve the crosslinking strength of the coating system, promoting the firm bonding of reflective heat-insulating pigments within the coating system, improving the stability and durability of the coating's reflective heat-insulating performance, and reducing delamination and cracking. Waterborne acrylic-epoxy hybrid emulsions combine the advantages of acrylic and epoxy resins, enhancing the adhesion between traditional waterborne EAU acrylic emulsions and the substrate, improving the coating's adhesion, strength, and abrasion resistance, and enhancing the coating's crack resistance and abrasion resistance. Styrene-modified hydroxy acrylic emulsions combine the advantages of styrene and hydroxy acrylic emulsions, improving the coating's adhesion and abrasion resistance, while also enhancing the coating's impact resistance and stability.

[0009] Preferably, the mass ratio of the styrene-modified hydroxy acrylic emulsion to the aqueous acrylic epoxy hybrid emulsion is (4-6):1.

[0010] Preferably, the reflective heat-insulating pigment is one of reflective heat-insulating titanium dioxide, reflective heat-insulating red powder, reflective heat-insulating yellow powder, and reflective heat-insulating black powder.

[0011] By adopting the above technical solutions, titanium dioxide has the highest refractive index among white pigments, resulting in stronger reflection of sunlight. Simultaneously, it possesses high hiding power, thus contributing to better reflective and heat-insulating effects in coatings. Reflective and heat-insulating red, yellow, and black pigments are formed by combining different pigments with aluminum silicate, iron oxide, and titanium oxide. These pigments exhibit strong reflective and heat-insulating properties, improving the heat reflection, heat radiation, and heat barrier properties of coatings, thereby reducing surface temperature.

[0012] Preferably, the raw material of component A further includes polyvinyl alcohol and aminosilane coupling agent, wherein the mass ratio of polyvinyl alcohol, aminosilane coupling agent and reflective heat-insulating pigment is (5-8):(3-5):(10-40).

[0013] By employing the above technical solution, the reflective heat-insulating pigment is surface-coated using an aminosilane coupling agent and polyvinyl alcohol (PVA). The aminosilane coupling agent coats the surface of the reflective heat-insulating pigment, effectively preventing the aggregation and reinforcement between pigment particles due to its long carbon chain. It also links active groups such as amino groups to the surface of the pigment, promoting uniform dispersion of the pigment in the aqueous EVU emulsion. This improves the dispersion uniformity of the EVU emulsion in the coating system, thereby enhancing the stability and uniformity of the coating's reflective heat-insulating performance. PVA promotes the uniform distribution of the reflective heat-insulating pigment in the coating system, reducing stratification and sedimentation. Simultaneously, PVA enhances the adhesion between the coating and the substrate, further reducing coating peeling and cracking.

[0014] Preferably, the reflective heat-insulating pigment, aminosilane coupling agent, and solvent are mixed in advance, heated and reacted, the reflective heat-insulating pigment is taken out and dried, and then the reflective heat-insulating pigment is dispersed in polyvinyl alcohol, reacted and dried to obtain the modified reflective heat-insulating pigment.

[0015] By adopting the above technical solution, an aminosilane coupling agent is first used to encapsulate the reflective heat-insulating pigment, thereby increasing the active groups on the surface of the reflective heat-insulating pigment and reducing the agglomeration of the reflective heat-insulating pigment particles. Then, polyvinyl alcohol is used to modify the reflective heat-insulating pigment, which can promote the uniform dispersion of the reflective heat-insulating pigment after being encapsulated by the aminosilane coupling agent in the coating system. Polyvinyl alcohol firmly suspends and disperses the reflective heat-insulating pigment in the coating system, reducing the precipitation and stratification of the reflective heat-insulating pigment in the coating system.

[0016] Preferably, the dispersant is at least one of natural polymers, synthetic polymers, and ethylene polymer dispersants.

[0017] By adopting the above technical solutions, natural polymeric dispersants such as sodium lignosulfonate have strong dispersing ability and can improve the dispersion stability of coatings. Synthetic polymeric dispersants such as ammonium salts, sulfonates, and carboxylates, as well as ethylene polymeric dispersants such as vinyl tert-butyl ether, can improve the leveling and dispersibility of coating systems, thereby enhancing the uniformity and smoothness of the coating.

[0018] Preferably, component C further includes raw materials: wear-resistant powder, quartz powder, dust suppressant, preservative and cellulose ether, wherein the mass ratio of wear-resistant powder, quartz powder, dust suppressant, preservative, cellulose ether and colored sand is (15-30):(3-10):(0.1-1):(0.2-0.6):(0.01-0.1):(50-80).

[0019] By adopting the above technical solutions, adding appropriate amounts of wear-resistant powder and quartz powder to the coating system can improve the hardness and wear resistance of the coating, reducing wear and cracking caused by long-term friction from vehicles on the road surface. Cellulose ether can stabilize the dispersion of reflective heat-insulating pigments and other filler particles, reducing the sedimentation or aggregation of filler particles in the coating system. At the same time, it enhances the adhesion between the coating and the substrate, improving the adhesion and uniformity of the coating, thereby reducing coating cracking and peeling.

[0020] Preferably, the wear-resistant powder is hydrophilic silica, and the particle size of the hydrophilic silica is 50-100 nm.

[0021] By adopting the above technical solution, the use of hydrophilic silica can improve the wear resistance of coatings, enhance the hardness and wear resistance of coatings, and reduce the wear and cracking of coatings on road surfaces.

[0022] Preferably, the cellulose ether is one of hydroxyethyl cellulose ether and sodium carboxymethyl cellulose.

[0023] Secondly, this application provides a method for preparing a colored pavement coating with reflective heat insulation function, using the following technical solution:

[0024] A method for preparing a colored pavement coating with reflective and heat-insulating functions includes the following specific steps:

[0025] The curing agent, dispersant, wetting agent, water-reducing agent, leveling agent, defoamer and thickener are mixed and stirred evenly. Then, reflective heat-insulating pigments are added and dispersed evenly to obtain component A. Then, components A, B and C are mixed to obtain a colored pavement coating with reflective heat-insulating function.

[0026] By adopting the above technical solution, the prepared colored road surface coating can firmly disperse reflective and heat-insulating pigments in the coating system under the synergistic effect of various components, thereby improving the reflective and heat-insulating performance of the coating and reducing the phenomenon of coating cracking.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. Because this application uses a styrene-modified hydroxy acrylic emulsion and a water-based acrylic-epoxy hybrid emulsion, it can enhance the crosslinking strength of the coating system, firmly bind the reflective and heat-insulating pigments to the coating ethylene, improve the reflective and heat-insulating properties of the coating, and reduce the phenomenon of coating cracking and delamination.

[0029] 2. In this application, aminosilane coupling agent and polyvinyl alcohol are used to sequentially bond with reflective heat-insulating pigments to the surface, which can improve the active groups on the surface of reflective heat-insulating pigments, promote the uniform and firm dispersion of reflective heat-insulating pigments in the coating system, and further improve the reflective and heat-insulating performance of the coating. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the embodiments.

[0031] The curing agent selected was Huntsman D230 polyether amine curing agent from the United States.

[0032] The wetting agent chosen was Tego4000 polyether-modified polysiloxane.

[0033] The water-reducing agent selected was polycarboxylate water-reducing agent from Shandong Tianhong Chemical Co., Ltd.

[0034] The leveling agent chosen was BYK-300 silicone surface additive.

[0035] The defoamer chosen was BYK-024, sold by the German company BYK.

[0036] The thickener chosen was Dow Chemical's hydrophobically modified alkali-swellable thickener TT-935.

[0037] The quartz powder was selected to be supplied by Fuyuan Refined Quartz Sand Plant.

[0038] The dust suppressant chosen was Hemings water-based lithium montmorillonite bentonite (BENTONE).

[0039] The preservative chosen was sodium nitrite from Tongli Chemical Co., Ltd.

[0040] The hydroxyethyl cellulose ether selected was Dow Chemical QP4400H.

[0041] The colored sand is a special colored sand for colored road surfaces, which is made by Suzhou High-tech Zone Dacheng Low-carbon Environmental Protection New Materials Co., Ltd.

[0042] The styrene-modified hydroxy acrylic emulsion selected was Badifu emulsion RS-938.

[0043] The waterborne acrylic-epoxy hybrid emulsion was selected as a mixture of BLJ-2337A acrylic emulsion and Beckopox387W waterborne epoxy emulsion, with a mass ratio of 2:1.

[0044] Example of preparation of component A

[0045] Preparation Example 1

[0046] Component A comprises the following raw materials in parts by weight: 433.4 kg curing agent, 26.7 kg dispersant, 10.7 kg wetting agent, 13.4 kg water-reducing agent, 13.4 kg leveling agent, 5 kg defoamer, 10 kg thickener, and 100 kg reflective heat-insulating pigment. The reflective heat-insulating pigment is reflective heat-insulating titanium dioxide, and the dispersant is Dow Chemical CA-2500 high-molecular-weight ammonium salt dispersant.

[0047] The preparation method of component A includes the following specific steps:

[0048] Mix the curing agent, dispersant, wetting agent, water-reducing agent, leveling agent, and defoamer, add water (water to curing agent mass ratio of 0.9:1), disperse at high speed of 1000 rpm for 15 min, then reduce the stirring speed to 500 rpm, add thickener and reflective heat-insulating pigment, increase the stirring speed to 1500 rpm, disperse for 30 min, and after the fineness reaches within 40 μm, component A is obtained.

[0049] Preparation Example 2

[0050] The difference between Preparation Example 2 and Preparation Example 1 is that the amount of curing agent used in component A is 650.1 kg, the amount of dispersant used is 40.05 kg, the amount of wetting agent used is 16.05 kg, the amount of water-reducing agent used is 20.1 kg, the amount of leveling agent used is 20.1 kg, the amount of defoamer used is 7.5 kg, the amount of thickener used is 10 kg, and the amount of reflective heat-insulating pigment used is 100 kg.

[0051] Preparation Example 3

[0052] The difference between Preparation Example 3 and Preparation Example 1 is that the amount of curing agent used in component A is 886.8 kg, the amount of dispersant used is 53.4 kg, the amount of wetting agent used is 21.4 kg, the amount of water-reducing agent used is 26.8 kg, the amount of leveling agent used is 26.8 kg, the amount of defoamer used is 10 kg, the amount of thickener used is 20 kg, and the amount of reflective heat-insulating pigment used is 200 kg.

[0053] Preparation Example 4

[0054] The difference between Preparation Example 4 and Preparation Example 1 is that the amount of curing agent used in component A is 1300.2 kg, the amount of dispersant used is 80.1 kg, the amount of wetting agent used is 32.1 kg, the amount of water-reducing agent used is 40.2 kg, the amount of leveling agent used is 40.2 kg, the amount of defoamer used is 15 kg, the amount of thickener used is 30 kg, and the amount of reflective heat-insulating pigment used is 300 kg.

[0055] Preparation Example 5

[0056] The difference between Preparation Example 5 and Preparation Example 1 is that the amount of curing agent used in component A is 20 kg, the amount of dispersant is 1 kg, the amount of wetting agent is 0.5 kg, the amount of water-reducing agent is 0.8 kg, the amount of leveling agent is 0.8 kg, the amount of defoamer is 0.5 kg, the amount of thickener is 0.5 kg, and the amount of reflective heat-insulating pigment is 10 kg.

[0057] Preparation Example 6

[0058] The difference between Preparation Example 6 and Preparation Example 1 is that the amount of curing agent used in component A is 44 kg, the amount of dispersant used is 3 kg, the amount of wetting agent used is 1.5 kg, the amount of water reducing agent used is 1.5 kg, the amount of leveling agent used is 1.5 kg, the amount of defoamer used is 0.7 kg, the amount of thickener used is 1.5 kg, and the amount of reflective heat-insulating pigment used is 40 kg.

[0059] Preparation Example 7

[0060] The difference between Preparation Example 7 and Preparation Example 1 is that the raw material of Component A also includes an aminosilane coupling agent, wherein the mass ratio of the aminosilane coupling agent to the reflective heat-insulating pigment is 4:25, and the aminosilane coupling agent is γ-aminopropyltrimethoxysilane.

[0061] The preparation method of component A includes the following specific steps:

[0062] S1: Mix the reflective heat-insulating pigment, aminosilane coupling agent, and isopropanol in advance, stir thoroughly for 2 hours, dry at 85°C for 5 hours, and then heat to 120°C and vacuum dry for 5 hours to obtain the aminosilane coupling agent coated reflective heat-insulating pigment.

[0063] S2: Mix the curing agent, dispersant, wetting agent, water-reducing agent, leveling agent and defoamer, add water, the mass ratio of water to curing agent is 0.9:1, disperse at high speed of 1000 rpm for 15 min, then reduce the stirring speed to 500 rpm, add thickener and aminosilane coupling agent to coat the reflective heat-insulating pigment and mix, increase the stirring speed to 1500 rpm, disperse for 30 min, and after the fineness reaches within 40 μm, component A is obtained.

[0064] Preparation Example 8

[0065] The difference between Preparation Example 8 and Preparation Example 1 is that the raw material of Component A also includes polyvinyl alcohol, wherein the mass ratio of polyvinyl alcohol to reflective heat-insulating pigment is 7:25.

[0066] The preparation method of component A includes the following specific steps:

[0067] S1: Mix polyvinyl alcohol and water to form a polyvinyl alcohol aqueous solution with a mass fraction of 50%. Disperse the reflective heat-insulating pigment in the polyvinyl alcohol aqueous solution, stir thoroughly for 2 hours, then remove the residual solution, and dry at 120°C for 1 hour to obtain polyvinyl alcohol-coated reflective heat-insulating pigment.

[0068] S2: Mix the curing agent, dispersant, wetting agent, water-reducing agent, leveling agent and defoamer, add water, the mass ratio of water to curing agent is 0.9:1, disperse at high speed of 1000 rpm for 15 min, then reduce the stirring speed to 500 rpm, add thickener and polyvinyl alcohol coated reflective heat-insulating pigment and mix, increase the stirring speed to 1500 rpm, disperse for 30 min, and after the fineness reaches within 40 μm, component A is obtained.

[0069] Preparation Example 9

[0070] The difference between Preparation Example 9 and Preparation Example 8 is that the raw material of Component A also includes an aminosilane coupling agent, wherein the mass ratio of aminosilane coupling agent, polyvinyl alcohol and reflective heat-insulating pigment is 4:7:25, and the aminosilane coupling agent is γ-aminopropyltrimethoxysilane.

[0071] The preparation method of component A includes the following specific steps:

[0072] S1: The reflective heat-insulating pigment, aminosilane coupling agent, and isopropanol are mixed in advance and stirred thoroughly for 2 hours. Then, the mixture is dried at 85°C for 5 hours and then heated to 120°C and vacuum dried for 5 hours to obtain the aminosilane coupling agent-coated reflective heat-insulating pigment. Polyvinyl alcohol and water are mixed to form a polyvinyl alcohol aqueous solution with a mass fraction of 50%. The reflective heat-insulating pigment is dispersed in the polyvinyl alcohol aqueous solution and stirred thoroughly for 2 hours. Then, the residual solution is removed and the mixture is dried at 120°C for 1 hour to obtain the polyvinyl alcohol-coated reflective heat-insulating pigment.

[0073] S2: Mix the curing agent, dispersant, wetting agent, water-reducing agent, leveling agent and defoamer, add water, the mass ratio of water to curing agent is 0.9:1, disperse at high speed of 1000 rpm for 15 min, then reduce the stirring speed to 500 rpm, add thickener and polyvinyl alcohol coated reflective heat-insulating pigment and mix, increase the stirring speed to 1500 rpm, disperse for 30 min, and after the fineness reaches within 40 μm, component A is obtained.

[0074] Preparation Example 10

[0075] The difference between Preparation Example 10 and Preparation Example 9 is that the mass ratio of polyvinyl alcohol, aminosilane coupling agent and reflective heat-insulating pigment in component A is 5:5:10.

[0076] Preparation Example 11

[0077] The difference between Preparation Example 11 and Preparation Example 9 is that the mass ratio of polyvinyl alcohol, aminosilane coupling agent and reflective heat-insulating pigment in component A is 8:3:40.

[0078] Preparation example of component C

[0079] Preparation Example 12

[0080] Component C comprises the following raw materials in parts by weight: 8760 kg of colored sand, 2332.8 kg of wear-resistant powder, 828 kg of quartz powder, 9.6 kg of dust suppressant, 64.8 kg of preservative, and 4.8 kg of cellulose ether; wherein the cellulose ether is hydroxyethyl cellulose ether, and the wear-resistant powder is hydrophilic silica with an average particle size of 50-100 nm.

[0081] The preparation method of component C includes the following specific steps:

[0082] Abrasion-resistant powder, quartz powder, dust suppressant, preservative, colored sand, and cellulose ether are mixed and placed in a mixer to obtain component C.

[0083] Preparation Example 13

[0084] The difference between Preparation Example 13 and Preparation Example 12 is that the amount of colored sand used in component C is 13140 kg, the amount of wear-resistant powder is 3499.2 kg, the amount of quartz powder is 1242 kg, the amount of dust suppressant is 14.4 kg, the amount of preservative is 97.2 kg, and the amount of cellulose ether is 7.2 kg.

[0085] Preparation Example 14

[0086] The difference between Preparation Example 14 and Preparation Example 12 is that the amount of colored sand used in component C is 17520 kg, the amount of wear-resistant powder is 4665.6 kg, the amount of quartz powder is 1656 kg, the amount of dust suppressant is 19.2 kg, the amount of preservative is 129.6 kg, and the amount of cellulose ether is 9.6 kg.

[0087] Preparation Example 15

[0088] The difference between Preparation Example 15 and Preparation Example 12 is that the amount of colored sand used in component C is 26280 kg, the amount of wear-resistant powder is 6998.4 kg, the amount of quartz powder is 2484 kg, the amount of dust suppressant is 28.8 kg, the amount of preservative is 194.4 kg, and the amount of cellulose ether is 14.4 kg.

[0089] Preparation Example 16

[0090] The difference between Preparation Example 16 and Preparation Example 12 is that the amount of colored sand used in component C is 50 kg, the amount of wear-resistant powder is 15 kg, the amount of quartz powder is 3 kg, the amount of dust suppressant is 0.1 kg, the amount of preservative is 0.2 kg, and the amount of cellulose ether is 0.01 kg.

[0091] Preparation Example 17

[0092] The difference between Preparation Example 17 and Preparation Example 12 is that the amount of colored sand used in component C is 80 kg, the amount of wear-resistant powder is 30 kg, the amount of quartz powder is 1 kg, the amount of dust suppressant is 1 kg, the amount of preservative is 0.6 kg, and the amount of cellulose ether is 0.1 kg.

[0093] Preparation Example 18

[0094] The difference between Preparation Example 18 and Preparation Example 12 is that the cellulose ether in component C is sodium carboxymethyl cellulose.

[0095] Preparation Example 19

[0096] The difference between Preparation Example 19 and Preparation Example 12 is that the raw material for component C is colored sand.

[0097] Example

[0098] Example 1

[0099] This embodiment provides a colored pavement coating with reflective heat insulation function, comprising component A, component B, and component C, with a weight ratio of component A, component B, and component C of 1:3:12. Component A is derived from preparation example 1, component B is an aqueous EVU emulsion, and component C is derived from preparation example 12. The aqueous EVU emulsion is a mixture of styrene-modified hydroxy acrylic emulsion and aqueous acrylic-epoxy hybrid emulsion, with a mass ratio of styrene-modified hydroxy acrylic emulsion to aqueous acrylic-epoxy hybrid emulsion of 5:1.

[0100] The preparation method of colored pavement coating with reflective heat insulation function includes the following specific steps: mixing component A, component B and component C evenly to obtain colored pavement coating with reflective heat insulation function.

[0101] Example 2

[0102] The difference between Example 2 and Example 1 is that component A of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 2, and component C is derived from Preparation Example 13.

[0103] Example 3

[0104] The difference between Example 3 and Example 1 is that component A of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 3, and component C is derived from Preparation Example 14.

[0105] Example 4

[0106] The difference between Example 4 and Example 1 is that component A of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 4, and component C is derived from Preparation Example 15.

[0107] Example 5

[0108] The difference between Example 5 and Example 1 is that component A of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 5, and component C is derived from Preparation Example 16.

[0109] Example 6

[0110] The difference between Example 6 and Example 1 is that component A of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 6, and component C is derived from Preparation Example 17.

[0111] Example 7

[0112] The difference between Example 7 and Example 1 is that the mass ratio of styrene-modified hydroxyl acrylic emulsion and waterborne acrylic epoxy hybrid emulsion in the waterborne EVU emulsion of component B of the colored pavement coating with reflective heat insulation function is 4:1.

[0113] Example 8

[0114] The difference between Example 8 and Example 1 is that the mass ratio of styrene-modified hydroxyl acrylic emulsion and waterborne acrylic epoxy hybrid emulsion in the waterborne EVU emulsion of component B of the colored pavement coating with reflective heat insulation function is 6:1.

[0115] Example 9

[0116] The difference between Example 9 and Example 1 is that the C component of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 18.

[0117] Example 10

[0118] The difference between Example 10 and Example 1 is that the A component of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 7.

[0119] Example 11

[0120] The difference between Example 11 and Example 1 is that the A component of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 8.

[0121] Example 12

[0122] The difference between Example 12 and Example 1 is that the A component of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 9.

[0123] Example 11

[0124] The difference between Example 11 and Example 1 is that the A component of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 10.

[0125] Example 12

[0126] The difference between Example 12 and Example 1 is that the A component of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 11.

[0127] Example 13

[0128] The difference between Example 13 and Example 1 is that the C component of the colored pavement coating with reflective heat insulation function is derived from Preparation Example 19.

[0129] Comparative Example

[0130] Comparative Example 1

[0131] The difference between Comparative Example 1 and Example 1 is that the waterborne EVU emulsion of component B of the colored pavement coating with reflective heat insulation function is a waterborne acrylic epoxy hybrid emulsion.

[0132] Comparative Example 2

[0133] The difference between Comparative Example 2 and Example 1 is that the waterborne EVU emulsion of component B of the colored pavement coating with reflective heat insulation function is a styrene-modified hydroxy acrylic emulsion.

[0134] Performance testing

[0135] The following performance tests were conducted on the colored pavement coatings with reflective heat insulation function provided in Examples 1-13 and Comparative Examples 1-2 of this application. The specific test results are shown in Tables 1 and 2.

[0136] Detection methods

[0137] I. Adhesion

[0138] The adhesion between the colored pavement coating prepared in this application and the substrate was tested in accordance with the standard GB / T 5210-2006 "Paints and Varnishes - Pull-off Adhesion Test".

[0139] II. Reflective heat insulation performance

[0140] Referring to the testing standards for solar reflectance and near-infrared reflectance in section 6.4 of JC / T235-2014 "Architectural Reflective Thermal Insulation Coatings", the L value was determined in accordance with the standard of GB / T11186.2 "Determination of Coating Color, Part 2: Color Measurement" to test the reflective thermal insulation performance of the colored pavement coating prepared in this application.

[0141] III. Abrasion resistance and crack resistance

[0142] Referring to Table 4 of GB / T22374-2018 "Floor Coating Materials", the abrasion resistance and crack resistance of the colored pavement coating prepared in this application were tested through abrasion resistance and impact resistance tests.

[0143] Table 1: Test Results of Reflective Thermal Insulation Performance

[0144] Example L value Solar reflectance Near-infrared reflectance Example 1 55.89 0.47 0.7 Example 12 69.82 0.56 0.76 Example 13 75.32 0.73 0.83 Comparative Example 1 32.56 0.3 0.42 Comparative Example 2 37.28 0.28 0.32

[0145] Table 2: Comprehensive Performance Test Results of Coatings

[0146]

[0147]

[0148] The performance test results show that, under the synergistic effect of the various components, this application has good reflective heat insulation performance, while the adhesion and crack resistance of the coating are also improved, enhancing the durability of the coating.

[0149] A comparison of Examples 10, 11, and 12 with the previous examples reveals that Example 10 added an appropriate amount of aminosilane coupling agent to the coating system, Example 11 added an appropriate amount of polyvinyl alcohol to the coating system, and Example 12 added an appropriate amount of both aminosilane coupling agent and polyvinyl alcohol to the coating system. Performance testing results show that the coatings prepared in Examples 10, 11, and 12 exhibit significantly improved wear resistance and adhesion, with Example 12 showing a more pronounced improvement. This further demonstrates that the synergistic effect of polyvinyl alcohol and aminosilane coupling agent can promote better reflective heat insulation performance in the coating, while also ensuring good adhesion and wear resistance.

[0150] A comparison of Example 13 and Example 1 shows that in Example 1, component C, by combining colored sand and additives, can better improve the uniformity of the coating, thereby enhancing the adhesion and wear resistance of the coating and reducing the cracking phenomenon of the coating.

[0151] By comparing Comparative Examples 1 and 2 with Example 1, it can be seen that Comparative Example 1 uses a water-based acrylic-epoxy hybrid emulsion, and Comparative Example 2 uses a styrene-modified hydroxyl acrylic emulsion. The performance test results show that the overall performance of the coatings is lower than that of Example 1.

[0152] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A colored pavement coating having a heat-reflecting function, characterized by comprising: a pigment having a heat-reflecting function; and a binder. The composition comprises A component, B component and C component, the weight ratio of the A component, the B component and the C component is 1:(2-4):(10-15), the A component comprises the following raw materials: curing agent, dispersant, wetting agent, water reducing agent, leveling agent, defoaming agent, thickening agent and reflective thermal insulation pigment, the mass ratio of the curing agent, the dispersant, the wetting agent, the water reducing agent, the leveling agent, the defoaming agent, the thickening agent and the reflective thermal insulation pigment is (20-44):(1-3):(0.5-1.5):(0.8-1.5):(0.8-1.5):(0.5-0.7):(0.5-1.5):(10-40); The B component is a water-based EVU emulsion, the water-based EVU emulsion is a mixture of styrene modified hydroxy acrylic emulsion and water-based acrylic epoxy hybrid emulsion; the C component comprises colored sand.

2. The colored pavement coating having a reflective thermal insulation function according to claim 1, characterized by, The mass ratio of the styrene modified hydroxy acrylic emulsion and the water-based acrylic epoxy hybrid emulsion is (4-6):

1.

3. The colored pavement coating having a reflective thermal insulation function according to claim 1, characterized by, The reflective thermal insulation pigment is one of reflective thermal insulation titanium dioxide, reflective thermal insulation red powder, reflective thermal insulation yellow powder and reflective thermal insulation black powder.

4. The colored pavement coating having a reflective thermal insulation function according to claim 3, characterized in that, The A component raw material further comprises polyvinyl alcohol and amino silane coupling agent, and the mass ratio of the polyvinyl alcohol, the amino silane coupling agent and the reflective thermal insulation pigment is (5-8):(3-5):(10-40).

5. The colored pavement coating having a reflective thermal insulation function according to claim 4, characterized by, The reflective thermal insulation pigment, the amino silane coupling agent and the solvent are mixed in advance, heated and reacted, then the reflective thermal insulation pigment is taken out and dried, and then the reflective thermal insulation pigment is dispersed in the polyvinyl alcohol, reacted and dried to obtain the modified reflective thermal insulation pigment.

6. The colored pavement coating having a reflective thermal insulation function according to claim 1, wherein the pigment is titanium dioxide. The dispersant is at least one of natural polymer and synthetic polymer dispersant.

7. The colored pavement coating having a reflective thermal insulation function according to claim 1, wherein the pigment is titanium dioxide. The C component further comprises raw materials: wear-resistant powder, quartz powder, anti-settling agent, preservative and cellulose ether, and the mass ratio of the wear-resistant powder, the quartz powder, the anti-settling agent, the preservative, the cellulose ether and the colored sand is (15-30):(3-10):(0.1-1):(0.2-0.6):(0.01-0.1):(50-80).

8. The colored pavement coating having a reflective thermal insulation function according to claim 7, characterized by, The wear-resistant powder is hydrophilic silicon dioxide, and the particle size of the hydrophilic silicon dioxide is 50-100 nm.

9. The colored pavement coating having a reflective thermal insulation function according to claim 7, characterized by, The cellulose ether is one of hydroxyethyl cellulose ether and sodium carboxymethyl cellulose.

10. A preparation method of the colored pavement coating with reflective thermal insulation function according to any one of claims 1-9, comprising the following specific steps: The curing agent, the dispersant, the wetting agent, the water reducing agent, the leveling agent, the defoaming agent and the thickening agent are mixed and stirred uniformly, then the reflective thermal insulation pigment is added, and the A component is prepared after being dispersed uniformly; then the A component, the B component and the C component are mixed to obtain the colored pavement coating with reflective thermal insulation function.

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