Wear-resistant hot-melt traffic marking paint and preparation method thereof

Abstract

The present application relates to hot melt coating technical field, propose a kind of wear-resistant hot melt traffic marking paint and preparation method thereof, wear-resistant hot melt traffic marking paint, including the following weight parts component raw materials: 55~65 parts C5 petroleum resin, 5~10 parts terpene resin, 180~260 parts wear-resistant component, 70~80 parts hollow glass microsphere, 10~16 parts auxiliary agent, 8~12 parts titanium white;Wear-resistant component includes heavy calcium carbonate powder, quartz sand, polyurethane emulsion;The viscosity of polyurethane emulsion is 100~4500cps.By the above technical scheme, the problem of poor wear resistance of hot melt traffic marking paint in related art is solved.

Description

Technical Field

[0001] This invention relates to the field of hot melt coating technology, specifically to a wear-resistant hot melt traffic marking coating and its preparation method. Background Technology

[0002] With the rapid development of my country's transportation industry, highway traffic volume is increasing daily, and the performance requirements for traffic markings are also becoming more stringent. Hot-melt traffic marking paints, with their advantages of rapid drying, good wear resistance, and strong nighttime reflectivity, have been widely used in road markings. However, existing hot-melt traffic marking paints still reveal some problems that urgently need to be addressed in practical use.

[0003] For example, hot-melt traffic marking paint lacks sufficient abrasion resistance. Under long-term vehicle pressure, friction, and natural environmental erosion, the markings are prone to wear and fading, leading to reduced clarity and legibility, and shortening their lifespan. Furthermore, frequent repainting not only increases maintenance costs but also disrupts traffic. For instance, on highways and main urban roads with high traffic volume, markings may need to be repainted after only 1-2 years, consuming significant manpower, resources, and financial investment.

[0004] To address the issue of insufficient abrasion resistance in hot-melt traffic marking paint, the amount of abrasion-resistant filler added is often increased. However, adding too much abrasion-resistant filler can actually lead to a decrease in abrasion resistance.

[0005] Therefore, there is a need to develop a wear-resistant hot-melt traffic marking coating to improve the service life of hot-melt traffic markings and save manpower, material resources, and financial resources. Summary of the Invention

[0006] This invention proposes a wear-resistant hot-melt traffic marking paint and its preparation method, which solves the problem of poor wear resistance of hot-melt traffic marking paint in related technologies.

[0007] The technical solution of the present invention is as follows:

[0008] This invention proposes a wear-resistant hot-melt traffic marking paint, comprising the following raw materials in parts by weight: 55-65 parts C5 petroleum resin, 5-10 parts terpene resin, 180-260 parts wear-resistant component, 70-80 parts hollow glass microspheres, 10-16 parts additives, and 8-12 parts titanium dioxide; wherein the wear-resistant component includes heavy calcium carbonate powder, quartz sand, and polyurethane emulsion; and the viscosity of the polyurethane emulsion is 100-4500 cps.

[0009] As a further technical method, the viscosity of the polyurethane emulsion is 800~1500cps.

[0010] In this invention, by limiting the viscosity of the polyurethane emulsion, the wear resistance of heavy calcium carbonate powder and quartz sand can be better utilized, thereby improving the overall wear resistance and stability of the hot-melt road marking paint.

[0011] As a further technical solution, the particle size of the heavy calcium carbonate powder is 180~600 mesh, and the particle size of the quartz sand is 400~200 mesh.

[0012] In this invention, by limiting the particle size of heavy calcium carbonate powder and quartz sand, they can be evenly distributed in hot-melt traffic marking paint, filling the gaps between materials, making the paint denser, reducing voids and defects, improving the overall uniformity and stability, playing a reinforcing role in the paint, improving the wear resistance of the paint, and extending the service life of the paint.

[0013] As a further technical solution, the preparation method of the wear-resistant component includes the following steps: adding heavy calcium carbonate powder and quartz sand into a polyurethane emulsion and stirring, then filtering and drying to obtain the wear-resistant component.

[0014] As a further technical solution, the mass ratio of the heavy calcium carbonate powder and quartz sand to the mass of the polyurethane emulsion added is 1:7.

[0015] As a further technical solution, the mass ratio of the heavy calcium carbonate powder to the quartz sand is 1:1~2.

[0016] As a further technical solution, the wear-resistant component also includes one or more of 3,3'-diaminobenzidine, 3-aminobiphenyl, and 4,4-diamino-1,1-biphenyl-3,3-dicarboxylic acid.

[0017] In this invention, one or more of 3,3'-diaminobenzidine, 3-aminobiphenyl, and 4,4-diamino-1,1-biphenyl-3,3-dicarboxylic acid are added to the wear-resistant component, which can further enhance the reinforcing effect of the wear-resistant component, improve the uniformity of the wear-resistant component's performance, and avoid the decline in overall wear resistance caused by poor local wear resistance.

[0018] As a further technical solution, the preparation method of the wear-resistant component includes the following steps: adding heavy calcium carbonate powder and quartz sand into polyurethane emulsion and stirring, then adding 3,3'-diaminobenzidine and stirring again, followed by filtration and drying to obtain the wear-resistant component.

[0019] As a further technical solution, the amount of 3,3'-diaminobenzidine added is 5% of the total mass of heavy calcium carbonate powder and quartz sand.

[0020] As a further technical solution, the terpene resin is composed of a first terpene resin and a second terpene resin, wherein the first terpene resin and the second terpene resin have different softening points.

[0021] In this invention, the overall performance of the coating can be improved by adding terpene resins with different softening points.

[0022] As a further technical solution, the softening point of the first terpene resin is less than that of the second terpene resin, and the mass ratio of the first terpene resin to the second terpene resin is 1:2.

[0023] As a further technical solution, the additives include one or more of defoamers, anti-settling agents, plasticizers, leveling agents, antioxidants, and dispersants.

[0024] As a further technical solution, the defoamer is an organosilicone defoamer.

[0025] As a further technical solution, the plasticizer includes one or more of dioctyl adipate, dioctyl phthalate, and epoxidized soybean oil.

[0026] As a further technical solution, the antioxidant includes one or more of hindered phenolic antioxidants, phosphite antioxidants, and thioester antioxidants.

[0027] As a further technical solution, the antioxidant is composed of hindered phenolic antioxidants and phosphite antioxidants.

[0028] In this invention, the antioxidant is composed of hindered phenolic antioxidants and phosphite antioxidants, which can effectively improve the thermal stability of hot melt coatings, reduce thermal degradation, improve processing performance, and extend the life of hot melt coatings.

[0029] As a further technical solution, the hindered phenolic antioxidant includes one or more of antioxidant BHT, antioxidant 1010, and antioxidant 1076, and the phosphite antioxidant includes one or two of antioxidant 168 and antioxidant 626.

[0030] As a further technical solution, the dispersant includes one or two of polyethylene wax and polyethylene oxide, preferably polyethylene wax and polyethylene oxide.

[0031] In this invention, the dispersant is preferably a mixture of polyethylene wax and polyethylene oxide. Using the mixture of the two can better utilize their dispersing properties and improve the dispersibility of wear-resistant components and other inorganic materials in hot-melt road marking paint.

[0032] The present invention also proposes a method for preparing a wear-resistant hot-melt traffic marking paint, comprising the following steps: mixing the raw materials in the specified weight proportions evenly to obtain a hot-melt traffic marking paint.

[0033] The working principle and beneficial effects of this invention are as follows:

[0034] In this invention, the hot-melt traffic marking paint uses petroleum resin and terpene resin as film-forming agents, which can improve the interaction force between the components in the paint raw materials, making the markings less likely to fall off during friction and improving the wear resistance of the paint. Titanium dioxide can improve the light resistance of the paint, thereby reducing the aging of the markings due to factors such as light exposure, maintaining the wear resistance of the markings, and extending their service life. The addition of hollow glass microspheres can enhance the reflectivity of the markings and reduce the cost of the hot-melt traffic marking paint. The wear-resistant components include heavy calcium carbonate powder, quartz sand, and polyurethane emulsion. Heavy calcium carbonate powder and quartz sand both have high hardness and can directly improve the wear resistance of the hot-melt traffic marking paint. Polyurethane emulsion can improve the stability of the wear-resistant component system of heavy calcium carbonate powder and quartz sand in the hot-melt traffic marking paint and improve the overall wear resistance of the marking paint. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] In the following embodiments and comparative examples:

[0037]

[0038] Hollow glass microspheres: average particle size 0.8 mm;

[0039] Titanium dioxide: average particle size 0.5μm;

[0040] Silicone defoamer: Model BYK-018;

[0041] C5 petroleum resin: Model SK130, Yuanliang, Taiwan, China;

[0042] Polyethylene wax: LP0020P, Thai SCG;

[0043] Polyoxyethylene: WSR-205, Dow Chemical, USA.

[0044] Example 1

[0045] A method for preparing a wear-resistant hot-melt traffic marking paint includes the following steps:

[0046] A wear-resistant hot-melt traffic marking paint is obtained by mixing 55 parts of C5 petroleum resin, 5 parts of terpene resin T-100, 180 parts of wear-resistant component, 70 parts of hollow glass microspheres, 5 parts of dioctyl adipate, 2 parts of silicone defoamer, 1 part of polyethylene wax, 1 part of polyethylene oxide, 0.5 parts of antioxidant 168, 0.5 parts of antioxidant 1010, and 8 parts of titanium dioxide.

[0047] The wear-resistant components include heavy calcium carbonate powder (average particle size 180 mesh), quartz sand (average particle size 200 mesh), and YC-350 polyurethane emulsion. The mass ratio of heavy calcium carbonate powder and quartz sand to the amount of YC-350 polyurethane emulsion added is 1:7, and the mass ratio of heavy calcium carbonate powder to quartz sand is 1:2.

[0048] The preparation method of the wear-resistant component includes the following steps: adding heavy calcium carbonate powder (average particle size 180 mesh) and quartz sand (average particle size 200 mesh) into YC-350 polyurethane emulsion and stirring for 40 min, filtering and drying to obtain the wear-resistant component.

[0049] Example 2

[0050] A method for preparing a wear-resistant hot-melt traffic marking paint includes the following steps:

[0051] A wear-resistant hot-melt traffic marking paint is obtained by mixing 65 parts of C5 petroleum resin, 10 parts of terpene resin T-100, 260 parts of wear-resistant component, 80 parts of hollow glass microspheres, 9 parts of dioctyl phthalate, 2.5 parts of silicone defoamer, 1.5 parts of polyethylene wax, 1.5 parts of polyoxyethylene, 1 part of antioxidant 168, 0.5 parts of antioxidant 1010, and 12 parts of titanium dioxide.

[0052] The wear-resistant components include heavy calcium carbonate powder (average particle size 400 mesh), quartz sand (average particle size 600 mesh), and YC-350 polyurethane emulsion. The mass ratio of heavy calcium carbonate powder and quartz sand to the amount of YC-350 polyurethane emulsion added is 1:7, and the mass ratio of heavy calcium carbonate powder to quartz sand is 1:2.

[0053] The preparation method of the wear-resistant component includes the following steps: adding heavy calcium carbonate powder (average particle size 400 mesh) and quartz sand (average particle size 600 mesh) into YC-350 polyurethane emulsion and stirring for 40 min, filtering and drying to obtain the wear-resistant component.

[0054] Example 3

[0055] Compared to Example 1, the YC-350 polyurethane emulsion was replaced with an equal amount of RY8410 polyurethane emulsion.

[0056] Example 4

[0057] Compared to Example 1, the YC-350 polyurethane emulsion was replaced with an equal amount of YC-1150 polyurethane emulsion.

[0058] Example 5

[0059] Compared with Example 3, the only difference is in the wear-resistant component. In this example, the wear-resistant component also includes 3,3'-diaminobenzidine. The preparation method of the wear-resistant component includes the following steps: adding heavy calcium carbonate powder (average particle size 180 mesh) and quartz sand (average particle size 200 mesh) to RY8410 polyurethane emulsion and mixing for 40 min, then adding 3,3'-diaminobenzidine (the amount added is 5% of the sum of the mass of heavy calcium carbonate powder and quartz sand) and stirring for 40 min, filtering and drying to obtain the wear-resistant component.

[0060] Example 6

[0061] Compared with Example 5, the only difference is that 3,3'-diaminobenzidine is replaced with an equal amount of 3-aminobiphenyl.

[0062] Example 7

[0063] Compared with Example 5, the only difference is that 3,3'-diaminobenzidine is replaced with an equal amount of 4,4-diamino-1,1-biphenyl-3,3-dicarboxylic acid.

[0064] Example 8

[0065] Compared with Example 5, the only difference is the preparation method of the wear-resistant component. The preparation method of the wear-resistant component in this example includes the following steps: adding heavy calcium carbonate powder (average particle size 180 mesh), quartz sand (average particle size 200 mesh), and 3,3'-diaminobenzidine to RY8410 polyurethane emulsion, stirring for 80 minutes, and then filtering and drying to obtain the wear-resistant component.

[0066] Example 9

[0067] Compared with Example 5, the only difference is that terpene resin T-100 is replaced with an equal amount of terpene resin T-110.

[0068] Example 10

[0069] Compared with Example 5, the only difference is that terpene resin T-100 is replaced with terpene resin T-100 and terpene resin T-110 in a mass ratio of 1:2.

[0070] Example 11

[0071] Compared with Example 5, the only difference is that terpene resin T-100 is replaced with terpene resin T-100 and terpene resin T-110 in a mass ratio of 2:1.

[0072] Example 12

[0073] Compared with Example 5, the only difference is that terpene resin T-100 is replaced with terpene resin T-100 and terpene resin T-110 in a mass ratio of 1:3.

[0074] Comparative Example 1

[0075] Compared with Example 1, the only difference is that the wear-resistant component does not contain YC-350 polyurethane emulsion. The preparation method of the wear-resistant component includes the following steps: mixing heavy calcium carbonate powder (average particle size 180 mesh) and quartz sand (average particle size 200 mesh) evenly to obtain the wear-resistant component.

[0076] After the hot-melt traffic marking paints of Examples 1-12 and Comparative Example 1 were hot-melted, they were applied to the markings to form a paint film with a thickness of 16±0.5μm, and the following tests were conducted.

[0077] Experimental Example 1

[0078] According to the test method in JT / T 280-2022 "Road Marking Paint", the abrasion resistance of the hot melt traffic marking paint in Examples 1 to 8 and Comparative Example 1 was determined, and the test results are shown in Table 1.

[0079] Table 1

[0080]

[0081] The wear resistance in Examples 1-8 of this invention is as low as 17.8-21.8 mg, indicating that the hot-melt traffic marking paint of this invention has excellent wear resistance and complies with the relevant provisions in JT / T 280-2022 "Road Marking Paint".

[0082] Experiment Example 2

[0083] According to the test method in JT / T 280-2022 "Road Marking Paint", the compressive strength (23±1℃) of the hot melt traffic marking paint in Examples 5 and 9~11 was measured, and the test results are shown in Table 2.

[0084] Table 2

[0085]

[0086] As shown in Table 2, the hot-melt traffic marking paint prepared by the present invention has high compressive strength, which can meet the requirements of practical applications and comply with the relevant provisions in JT / T 280-2022 "Road Marking Paint".

[0087] Experimental Example 3

[0088] According to the test methods in JT / T 280-2022 "Road Marking Paint", the low-temperature crack resistance and heating stability of the hot melt traffic marking paint in Example 1 were determined, and the test results are shown in Table 3.

[0089] Table 3

[0090]

[0091] As shown in Table 3, the hot-melt traffic marking paint of the present invention has excellent low-temperature crack resistance and heating stability, which meets the relevant provisions of JT / T 280-2022 "Road Marking Paint".

[0092] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wear-resistant hot-melt traffic marking paint, characterized in that, The raw materials comprise the following components by weight: 55-65 parts C5 petroleum resin, 5-10 parts terpene resin, 180-260 parts wear-resistant components, 70-80 parts hollow glass microspheres, 10-16 parts additives, and 8-12 parts titanium dioxide; the wear-resistant components include heavy calcium carbonate powder, quartz sand, and polyurethane emulsion; the viscosity of the polyurethane emulsion is 800-1500 cps. The wear-resistant component also includes one or more of 3,3'-diaminobenzidine or 4,4-diamino-1,1-biphenyl-3,3-dicarboxylic acid.

2. The wear-resistant hot-melt traffic marking paint according to claim 1, characterized in that, The particle size of the heavy calcium carbonate powder is 180-600 mesh, and the particle size of the quartz sand is 200-400 mesh.

3. The wear-resistant hot-melt traffic marking paint according to claim 2, characterized in that, The mass ratio of the heavy calcium carbonate powder to the quartz sand is 1:1~2.

4. The wear-resistant hot-melt traffic marking paint according to claim 1, characterized in that, The terpene resin is composed of a first terpene resin and a second terpene resin, and the first terpene resin and the second terpene resin have different softening points.

5. The wear-resistant hot-melt traffic marking paint according to claim 4, characterized in that, The softening point of the first terpene resin is less than that of the second terpene resin, and the mass ratio of the first terpene resin to the second terpene resin is 1:

2.

6. The wear-resistant hot-melt traffic marking paint according to claim 1, characterized in that, The additives include one or more of the following: defoamers, antisettling agents, plasticizers, leveling agents, antioxidants, and dispersants.

7. The wear-resistant hot-melt traffic marking paint according to claim 6, characterized in that, The defoamer is an organosilicone defoamer.

8. The wear-resistant hot-melt traffic marking paint according to claim 6, characterized in that, The plasticizer includes one or more of dioctyl adipate, dioctyl phthalate, and epoxidized soybean oil.

9. A method for preparing a wear-resistant hot-melt traffic marking paint according to any one of claims 1 to 8, characterized in that, The process includes the following steps: mixing the raw materials in the specified weight proportions evenly to obtain hot-melt traffic marking paint.

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