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

Abstract

The invention relates to the technical field of hot-melt coatings, and provides a wear-resistant hot-melt traffic marking coating and a preparation method thereof.The wear-resistant hot-melt traffic marking coating is prepared from, by weight, 55-65 parts of C5 petroleum resin, 5-10 parts of terpene resin, 180-260 parts of wear-resistant components, 70-80 parts of hollow glass beads, 10-16 parts of auxiliaries and 8-12 parts of titanium dioxide; the wear-resistant component comprises heavy calcium carbonate powder, quartz sand and polyurethane emulsion; and the viscosity of the polyurethane emulsion is 100 to 4500 cps. According to the technical scheme, the problem of poor wear resistance of the hot-melt traffic marking paint in related technologies is solved.

Description

Technical Field

[0001] The invention relates to the technical field of hot-melt coatings, and in particular to a wear-resistant hot-melt traffic marking coating and a preparation method thereof. Background Art

[0002] With the rapid development of my country's transportation industry, the traffic volume on highways is increasing, and the performance requirements for traffic markings are getting higher and higher. Thermoplastic traffic marking paint has been widely used in road markings due to its advantages such as quick drying, good wear resistance, and strong night reflectivity. However, the existing thermoplastic traffic marking paint still exposes some problems that need to be solved in actual use.

[0003] For example, the wear resistance of hot-melt traffic marking paint is insufficient. Under long-term vehicle rolling, friction and natural environmental erosion, the markings are prone to wear and fading, resulting in reduced clarity and recognition of the markings, shortening the service life of the markings. Moreover, frequent re-marking of the markings not only increases maintenance costs, but also has a certain impact on traffic. For example, on some highways and urban main roads with heavy traffic, the markings may need to be re-marked after 1-2 years of use, which consumes a lot of manpower, material resources and financial resources.

[0004] In order to solve the problem of insufficient wear resistance of hot-melt traffic marking paint, the amount of wear-resistant filler added is often increased, but excessive addition of wear-resistant filler will lead to a decrease in wear resistance.

[0005] Therefore, it is necessary to propose a wear-resistant hot-melt traffic marking paint to improve the service life of hot-melt traffic markings and save manpower, material resources and financial resources. Summary of the invention

[0006] The invention provides a wear-resistant hot-melt traffic marking paint and a preparation method thereof, which solves the problem of poor wear resistance of the hot-melt traffic marking paint in the related art.

[0007] The technical solution of the present invention is as follows: The invention provides a wear-resistant hot-melt traffic marking paint, which comprises the following raw materials in parts by weight: 55-65 parts of C5 petroleum resin, 5-10 parts of terpene resin, 180-260 parts of wear-resistant components, 70-80 parts of hollow glass microspheres, 10-16 parts of additives, and 8-12 parts of titanium dioxide; the wear-resistant components comprise heavy calcium carbonate powder, quartz sand, and polyurethane emulsion; and the viscosity of the polyurethane emulsion is 100-4500cps.

[0008] As a further technical method, the viscosity of the polyurethane emulsion is 800~1500cps.

[0009] In the present invention, the wear resistance of heavy calcium carbonate powder and quartz sand can be better exerted by limiting the viscosity of the polyurethane emulsion, thereby improving the overall wear resistance and stability of the hot-melt road marking paint.

[0010] 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.

[0011] In the present invention, by limiting the particle size of heavy calcium carbonate powder and quartz sand, they can be evenly distributed in the hot-melt traffic marking paint, fill the material gaps, make the paint denser, reduce voids and defects, improve the overall uniformity and stability, play a reinforcing role in the paint, improve the wear resistance of the paint, and extend the service life of the paint.

[0012] As a further technical solution, the preparation method of the wear-resistant component comprises the following steps: adding heavy calcium carbonate powder and quartz sand into the polyurethane emulsion and stirring, filtering and drying to obtain the wear-resistant component.

[0013] As a further technical solution, the mass ratio of the heavy calcium carbonate powder and quartz sand to the amount of polyurethane emulsion added is 1:7.

[0014] As a further technical solution, the mass ratio of the heavy calcium carbonate powder to quartz sand is 1:1~2.

[0015] As a further technical solution, the wear-resistant component further includes one or more of 3,3'-diaminobenzidine, 3-aminobiphenyl, and 4,4-diamino-1,1-biphenyl-3,3-dicarboxylic acid.

[0016] In the present 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 wear-resistant component, improve the uniformity of the wear-resistant component performance, and avoid the decrease in overall wear resistance due to poor local wear resistance.

[0017] 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 to the polyurethane emulsion and stirring, adding 3,3'-diaminobenzidine and stirring again, filtering and drying to obtain the wear-resistant component.

[0018] As a further technical solution, the added amount of the 3,3'-diaminobenzidine is 5% of the total mass of the heavy calcium carbonate powder and the quartz sand.

[0019] As a further technical solution, the terpene resin consists of a first terpene resin and a second terpene resin, and the first terpene resin and the second terpene resin have different softening points.

[0020] In the present invention, the overall performance of the coating can be improved by adding terpene resins with different softening point compositions for compounding.

[0021] As a further technical solution, the softening point of the first terpene resin is less than the softening point of the second terpene resin, and the mass ratio of the first terpene resin to the second terpene resin is 1:2.

[0022] As a further technical solution, the auxiliary agent includes one or more of a defoamer, an anti-settling agent, a plasticizer, a leveling agent, an antioxidant, and a dispersant.

[0023] As a further technical solution, the defoaming agent is a silicone defoaming agent.

[0024] As a further technical solution, the plasticizer includes one or more of dioctyl adipate, dioctyl phthalate, and epoxidized soybean oil.

[0025] As a further technical solution, the antioxidant includes one or more of hindered phenol antioxidants, phosphite antioxidants, and thioester antioxidants.

[0026] As a further technical solution, the antioxidant consists of a hindered phenol antioxidant and a phosphite antioxidant.

[0027] In the present invention, the antioxidant is a composite of a hindered phenol antioxidant and a phosphite antioxidant, which can effectively improve the thermal stability of the hot melt coating, reduce thermal degradation, improve processing performance, and extend the life of the hot melt coating.

[0028] As a further technical solution, the hindered phenol 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.

[0029] As a further technical solution, the dispersant includes one or two of polyethylene wax and polyoxyethylene, preferably polyethylene wax and polyoxyethylene.

[0030] In the present invention, the dispersant is preferably a compound of polyethylene wax and polyoxyethylene. The compound of the two can better exert the dispersibility of the two and improve the dispersibility of the wear-resistant component and other inorganic materials in the hot melt road marking paint.

[0031] The present invention also proposes a method for preparing a wear-resistant hot-melt traffic marking paint, comprising the following steps: uniformly mixing the raw materials in parts by weight to obtain the hot-melt traffic marking paint.

[0032] The working principle and beneficial effects of the present invention are: In the present invention, the hot-melt traffic marking paint uses petroleum resin and terpene resin as film-forming agents, which can improve the interaction between the components in the paint raw materials, make the markings not easy to fall off during the friction process, and improve the wear resistance of the paint. Titanium dioxide can improve the light resistance of the paint, so that the markings can reduce aging due to factors such as light, maintain the wear resistance of the markings, and extend the service life. The addition of hollow glass microbeads can enhance the reflective performance 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. The 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. The 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 DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the following examples and comparative examples:

[0035] Hollow glass microspheres: average particle size is 0.8mm; Titanium dioxide: average particle size 0.5μm; Silicone defoamer: model BYK-018; C5 petroleum resin: Model SK130, Yuanliang, Taiwan, China; Polyethylene wax: LP0020P, SCG, Thailand; Polyoxyethylene: WSR-205, Dow, USA.

[0036] Example 1 A method for preparing a wear-resistant hot-melt traffic marking paint comprises the following steps: 55 parts of C5 petroleum resin, 5 parts of terpene resin T-100, 180 parts of wear-resistant components, 70 parts of hollow glass microspheres, 5 parts of dioctyl adipate, 2 parts of silicone defoamers, 1 part of polyethylene wax, 1 part of polyoxyethylene, 0.5 parts of antioxidant 168, 0.5 parts of antioxidant 1010, and 8 parts of titanium dioxide are mixed to obtain a wear-resistant hot-melt traffic marking paint; The wear-resistant component includes 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 to quartz sand and 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; The preparation method of the wear-resistant component comprises the following steps: adding heavy calcium carbonate powder (average particle size 180 meshes) and quartz sand (average particle size 200 meshes) into YC-350 polyurethane emulsion, stirring for 40 minutes, filtering and drying to obtain the wear-resistant component.

[0037] Example 2 A method for preparing a wear-resistant hot-melt traffic marking paint comprises the following steps: 65 parts of C5 petroleum resin, 10 parts of terpene resin T-100, 260 parts of wear-resistant components, 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 are mixed to obtain a wear-resistant hot-melt traffic marking paint; The wear-resistant component includes 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 added amount of YC-350 polyurethane emulsion is 1:7, and the mass ratio of heavy calcium carbonate powder to quartz sand is 1:2; The preparation method of the wear-resistant component comprises the following steps: adding heavy calcium carbonate powder (average particle size 400 meshes) and quartz sand (average particle size 600 meshes) into YC-350 polyurethane emulsion, stirring for 40 minutes, filtering and drying to obtain the wear-resistant component.

[0038] Example 3 Compared with Example 1, the YC-350 polyurethane emulsion was replaced with an equal amount of RY8410 polyurethane emulsion.

[0039] Example 4 Compared with Example 1, the YC-350 polyurethane emulsion was replaced with an equal amount of YC-1150 polyurethane emulsion.

[0040] Example 5 Compared with Example 3, the only difference is the wear-resistant component. The wear-resistant component of this embodiment 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 minutes, then adding 3,3'-diaminobenzidine (the addition amount is 5% of the total mass of heavy calcium carbonate powder and quartz sand) and stirring for 40 minutes. After filtering and drying, the wear-resistant component is obtained.

[0041] Example 6 Compared with Example 5, the only difference is that 3,3'-diaminobenzidine is replaced by an equal amount of 3-aminobiphenyl.

[0042] Example 7 Compared with Example 5, the only difference is that 3,3'-diaminobenzidine is replaced by an equal amount of 4,4-diamino-1,1-biphenyl-3,3-dicarboxylic acid.

[0043] Example 8 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 embodiment 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, filtering and drying, and obtaining the wear-resistant component.

[0044] Example 9 Compared with Example 5, the only difference is that the terpene resin T-100 is replaced by an equal amount of terpene resin T-110.

[0045] Example 10 Compared with Example 5, the only difference is that the terpene resin T-100 is replaced by the terpene resin T-100 and the terpene resin T-110 in a mass ratio of 1:2.

[0046] Embodiment 11 Compared with Example 5, the only difference is that the terpene resin T-100 is replaced by the terpene resin T-100 and the terpene resin T-110 in a mass ratio of 2:1.

[0047] Example 12 Compared with Example 5, the only difference is that the terpene resin T-100 is replaced by the terpene resin T-100 and the terpene resin T-110 in a mass ratio of 1:3.

[0048] Comparative Example 1 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: heavy calcium carbonate powder (average particle size 180 meshes) and quartz sand (average particle size 200 meshes) are mixed evenly to obtain the wear-resistant component.

[0049] The hot-melt traffic marking paints in Examples 1 to 12 and Comparative Example 1 were hot-melted and then applied to marking lines to form a paint film with a thickness of 16±0.5 μm, and the following tests were performed.

[0050] Experimental Example 1 According to the determination method in JT / T 280-2022 "Road Marking Paint", the wear resistance of the hot-melt traffic marking paint in Examples 1 to 8 and Comparative Example 1 was determined, and the determination results are shown in Table 1.

[0051] Table 1

[0052] The wear resistance in Examples 1 to 8 of the present invention is as low as 17.8 to 21.8 mg, indicating that the hot-melt traffic marking paint of the present invention has good wear resistance and complies with the relevant provisions of JT / T 280-2022 "Road Marking Paint".

[0053] Experimental Example 2 According to the determination method in JT / T 280-2022 "Road Marking Paint", the (23±1°C) compressive strength of the hot-melt traffic marking paint in Examples 5 and 9 to 11 was determined. The determination results are shown in Table 2.

[0054] Table 2

[0055] It can be seen from Table 2 that the hot-melt traffic marking paint prepared by the present invention has high compressive strength, can meet the requirements of practical applications, and complies with the relevant provisions of JT / T 280-2022 "Road Marking Paint".

[0056] Experimental Example 3 According to the determination method 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 determination results are shown in Table 3.

[0057] Table 3

[0058] It can be seen from Table 3 that the hot-melt traffic marking paint of the present invention has excellent low-temperature crack resistance and heating stability, and complies with the relevant provisions of JT / T 280-2022 "Pavement Marking Paint".

[0059] The above are only 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 in the protection scope of the present invention.

Claims

1. A wear-resistant hot-melt traffic marking paint, characterized in that: The raw materials include the following components in parts by weight: 55-65 parts of C5 petroleum resin, 5-10 parts of terpene resin, 180-260 parts of wear-resistant components, 70-80 parts of hollow glass microspheres, 10-16 parts of additives, and 8-12 parts of titanium dioxide; the wear-resistant components include heavy calcium carbonate powder, quartz sand, and polyurethane emulsion; the viscosity of the polyurethane emulsion is 100-4500cps.

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 meshes, and the particle size of the quartz sand is 200-400 meshes.

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 quartz sand is 1:1-2.

4. The wear-resistant hot-melt traffic marking paint according to claim 1, characterized in that: The wear-resistant component further comprises one or more of 3,3'-diaminobenzidine, 3-aminobiphenyl, and 4,4-diamino-1,1-biphenyl-3,3-dicarboxylic acid.

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

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

2.

7. The wear-resistant hot-melt traffic marking paint according to claim 1, characterized in that: The auxiliary agent includes one or more of a defoamer, an anti-settling agent, a plasticizer, a leveling agent, an antioxidant, and a dispersant.

8. The wear-resistant hot-melt traffic marking paint according to claim 1, characterized in that: The defoamer is an organosilicon defoamer.

9. The wear-resistant hot-melt traffic marking paint according to claim 1, characterized in that: The plasticizer includes one or more of dioctyl adipate, dioctyl phthalate, and epoxidized soybean oil.

10. A method for preparing a wear-resistant hot-melt traffic marking paint according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain hot-melt traffic marking paint.

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