CN-121136540-B - High-brightness water-based elevation reflective marking paint and preparation method thereof

Abstract

The invention discloses a high-brightness water-based elevation reflective marking paint and a preparation method thereof, belonging to the technical field of road marking paint. The coating is prepared from the following raw materials, by weight, 20-35 parts of aqueous acrylic emulsion, 20-30 parts of water, 25-30 parts of glass beads, 10-15 parts of flaky pearlescent powder, 1-2 parts of wetting dispersant, 0.2-0.5 part of anti-settling agent, 5-10 parts of modified pearlescent powder and 1-3 parts of pearlescent powder orientation arrangement agent. The modified pearl powder is prepared by grafting and modifying flaky pearl powder through a silane coupling agent KH550 and polyvinyl alcohol, so that the dispersibility of the modified pearl powder in an aqueous system is remarkably improved, and the pearl powder orientation arrangement agent is a comb-shaped polymer formed by copolymerizing acrylic acid, a large monomer EPEG3000 and 3-pentenoic acid monoglyceride according to a specific mass ratio, and can effectively promote the orientation ordered arrangement of the pearl powder during film formation, so that a high-efficiency reflecting layer is formed. The two have synergistic effect, so that the coating has extremely high retroreflection brightness coefficient (more than or equal to 578 mcd/m 2 /lx), is far superior to the traditional product, and has the advantages of easily available raw materials and simple process.

Inventors

• Liu Ketang
• CHANG JUN
• ZHANG HONGWEI
• Ge Jiyan
• LI YAN
• GE MINGRUI
• XIE DONG

Assignees

• 山东路美交通设施有限公司

Dates

Publication Date

20260512

Application Date

20251015

Claims (7)

1. 1. The high-brightness water-based elevation reflective marking paint is characterized by being prepared from the following raw materials, by weight, 20-35 parts of water-based acrylic emulsion, 20-30 parts of water, 25-30 parts of glass beads, 10-15 parts of flaky pearl powder, 1-2 parts of wetting dispersant, 0.2-0.5 part of anti-settling agent, 5-10 parts of modified pearl powder and 1-3 parts of pearl powder directional arrangement agent; The modified pearl powder is prepared by reacting flaky pearl powder, a silane coupling agent KH550 and polyvinyl alcohol according to the mass ratio of 100 (1-1.5): 5; The pearl powder orientation alignment agent is prepared by copolymerization of acrylic acid, a large monomer EPEG3000 and 3-pentenoic acid monoglyceride according to a mass ratio of 10:90:2; The modified pearl powder is prepared by mixing and hydrolyzing a silane coupling agent KH550, water and ethanol according to a mass ratio of 2:1:9 for 30min, adding flaky pearl powder and polyvinyl alcohol into the mixture, and stirring and reacting at a high speed at 75-90 ℃ for 30-45 min to obtain the modified pearl powder; The pearl powder orientation arrangement agent is prepared by the following method: (a) Adding an initiator A and water into acrylic acid, and mixing to obtain a component A; (b) Uniformly mixing an initiator B, a chain transfer agent and water to obtain a component B; (c) And uniformly stirring and mixing the macromonomer EPEG3000, the 3-pentenoic acid monoglyceride and water to obtain a substrate, simultaneously dropwise adding the component A and the component B into the substrate, stirring and dropwise adding for 90-120 min, and adding saturated liquid alkali for neutralization after the dropwise adding is completed to obtain the pearl powder directional alignment agent.
2. 2. The high-brightness water-based elevation reflecting marking paint according to claim 1, wherein the initiator A is VC, the dosage is 1% -2% of the mass of acrylic acid, and the mass ratio of water to acrylic acid in the component A is 0.8:1.
3. 3. The high-brightness water-based elevation reflecting marking paint according to claim 1, wherein the initiator B is ammonium persulfate, the dosage is 3% -5% of the mass of acrylic acid, the chain transfer agent is mercaptopropionic acid, and the mass ratio of water to acrylic acid in the component B is 0.2:1.
4. 4. The high brightness aqueous elevation reflective marking paint of claim 1, wherein the amount of water in the substrate in step (c) is 80 times the mass of 3-pentenoic acid monoglyceride, and the amount of saturated liquid alkali is the same as the mass of acrylic acid.
5. 5. The high-brightness aqueous elevation reflective marking paint of claim 1, wherein the glass beads have a coefficient of retroreflection of 1.9 and a particle size of 200-350 mesh.
6. 6. The high brightness aqueous elevation reflective marking paint of claim 1, wherein the anti-settling agent is one of montmorillonite, hydroxymethyl cellulose powder, and hydroxymethyl propyl cellulose saturated solution.
7. 7. A method of preparing a high brightness aqueous fagade reflective marking paint as claimed in any one of claims 1 to 6, comprising the steps of: (1) Preparing modified pearl powder and pearl powder orientation arrangement agent respectively; (2) Adding the aqueous acrylic emulsion, water and the wetting dispersant into a dispersing kettle, stirring for 15-20 min at 1500-2000 r/min, continuously adding the flaky pearl powder, the modified pearl powder, the anti-settling agent, the pearl powder orientation arrangement agent and the glass beads, stirring for the second time, stirring for 20-30 min at 2500-3000 r/min, and filtering with a 60-mesh filter screen to obtain the finished product.

Description

High-brightness water-based elevation reflective marking paint and preparation method thereof Technical Field The invention belongs to the technical field of road marking paint, and particularly relates to a high-brightness water-based elevation reflective marking paint and a preparation method thereof. Background The reflective warning mark line realizes high visibility in night or low light environment by utilizing the light reverse reflection principle, and the construction materials mainly comprise a reflective film and a reflective coating. The front brightness of the traditional high-strength reflective film is about 250 mcd/m 2/lx, but the performance is obviously reduced under a large observation angle (such as 2 ℃) or rainy night environment, the reflective film of the full prism has high reflection efficiency (such as a diamond grade of 800 mcd/m 2/lx), but the cost is high and is easily limited by an installation angle, the reflective film needs to be adhered to a smooth surface, the rough surface of concrete and the like needs an additional step (such as an anchoring tinplate or special glue), the front construction is complex and is easily limited by a structure, the special-shaped surface is difficult to adhere, bubbles or wrinkles are easily generated, the old film needs to be thoroughly removed and re-adhered due to ageing of the back glue, temperature change or mechanical scratch, and the later maintenance is easy to cause edge warping and falling. The retroreflective coefficient of the reflective coating can reach 300-400 mcd/m 2/lx (measured value), the reflective coating still keeps high brightness in a rainy night or humid environment (for example, the retroreflective coefficient is more than or equal to 100 mcd/m 2/lx when continuous rainfall occurs), and the research shows that the wide angle visibility of the reflective coating is good, and the reflective coating can be directly attached to the surfaces of various materials such as cement concrete, wood, metal, asphalt and the like by adopting a spraying or brushing process, including uneven or special-shaped structures (for example, bridge pier columns, tunnel walls, anti-collision piers and the like). The construction of the steel plate does not need additional substrate treatment (such as galvanized plate installation), supports automatic spraying, has high efficiency, and can be formed in one step in multiple colors. Chinese patent CN106349838A discloses a super wide angle high brightness water-based environment-friendly elevation reflective coating and a preparation method thereof, wherein the reflective coating comprises, by weight, 20-30 parts of water-based acrylic resin, 1-5 parts of film forming auxiliary agents, 0.1-10 parts of cosolvent, 10-20 parts of metallic pigment, 5-15 parts of distilled water, 6-15 parts of coloring pigment, 20-60 parts of reflective carrier and 1-3 parts of auxiliary agents, and the auxiliary agents adopt a mixture of wetting dispersing agents, leveling agents, preservatives, thickening agents and defoaming agents in any proportion. The retroreflection coefficient in the patent is relatively low, only 288 mcd/m 2/lx is needed, and the national standard requirement cannot be met. Chinese patent CN119662089A discloses a formula, a preparation method and a preparation device of a facade reflective coating, wherein the reflective coating comprises, by weight, 30-40 parts of epoxy resin, 15-20 parts of glass beads, 10-20 parts of ceramic beads, 6-8 parts of titanium dioxide, 1-2 parts of polycarboxylate dispersant, 0.5-1 part of organosilicon defoamer, 1-2 parts of hydroxyethyl cellulose thickener, 1 part of silane coupling agent and 20-30 parts of deionized water. The patent does not give a specific value of the retroreflectivity, and the problem of low retroreflectivity and no brightness of the conventional reflective coating is not solved because the patent only improves the bonding strength of the reflective material and the matrix resin by modification and does not consider the retroreflectivity after film formation. The reflective coating can be found to be improved in reflective performance, and the reflective coating with the high-retroreflectivity material is obtained by combining and modifying different reflective materials, so that the production operation is simple and convenient, the cost is low, and the large-scale production is realized and the market is promoted. Disclosure of Invention The invention aims to provide a high-brightness water-based elevation reflecting marking paint, so as to further improve brightness and retroreflection of the water-based elevation reflecting marking paint. In order to achieve the technical purpose, the invention adopts the following technical scheme: The high-brightness water-based elevation reflective marking paint is prepared from the following raw materials, by weight, 20-35 parts of water-based acrylic emulsion, 20-30 parts of water, 25-30 parts of