Pressure-resistant hot-melt pavement marking paint and preparation method thereof

Abstract

The present application relates to the technical field of marking paint, and proposes a kind of anti-pressure hot melt pavement marking paint and a preparation method thereof.A kind of anti-pressure hot melt pavement marking paint, raw materials include the following weight parts of components: petroleum resin 25~35 parts, EVA resin 4~8 parts, PFA resin 2~6 parts, filler 45~64 parts, glass bead 20~25 parts, pigment 2~5 parts, plasticizer 2~4 parts.Through the above technical scheme, the problem that the mechanical property of hot melt pavement marking paint in the related art needs to be improved is solved.

Description

Technical Field

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

[0002] Hot-melt pavement marking paint is widely used in road traffic marking construction, and its performance directly affects the service life of the markings and driving safety. In actual use, pavement markings need to withstand repeated pressure and friction from vehicles, as well as changes in environmental temperature and humidity. Therefore, good mechanical properties are one of the important indicators for evaluating paint quality. Improving the mechanical properties of the paint, especially compressive strength and impact resistance, can effectively extend the service life of the markings, reduce maintenance frequency, lower road traffic management costs, and simultaneously improve nighttime reflectivity and driving safety.

[0003] However, currently available hot-melt pavement marking paints still have certain shortcomings in terms of mechanical properties, mainly manifested in weak compressive strength and susceptibility to cracking or peeling, making it difficult to meet the requirements of long-term, high-intensity use environments. Therefore, developing a hot-melt pavement marking paint with excellent compressive strength has become an urgent technical problem to be solved in this field. Summary of the Invention

[0004] This invention proposes a pressure-resistant hot-melt pavement marking paint and its preparation method to solve or alleviate at least one of the above-mentioned problems.

[0005] The technical solution of the present invention is as follows: This invention proposes a pressure-resistant hot-melt pavement marking paint, the raw materials of which include the following components in parts by weight: 25-35 parts petroleum resin, 4-8 parts EVA resin, 2-6 parts PFA resin, 45-64 parts filler, 20-25 parts glass microspheres, 2-5 parts pigment, and 2-4 parts plasticizer.

[0006] Preferably, the weight ratio of the filler to the PFA resin is 50:3~5.

[0007] Preferably, the raw material for the filler comprises the following components in parts by weight: 10-15 parts calcium carbonate, 5-10 parts mullite powder, and 25-30 parts silicone-acrylic emulsion.

[0008] Preferably, the method for preparing the filler includes the following steps: The calcium carbonate and mullite powder are mixed together, added to the silicone-acrylic emulsion, dispersed, and dried to obtain the filler.

[0009] Preferably, the viscosity of the silicone-acrylic emulsion is 1000~4000 cps and the solid content is 47%~49%.

[0010] Preferably, the average particle size of the glass microspheres is 300~800μm.

[0011] Preferably, the raw materials further include 1-2 parts of antioxidant, 1-2 parts of light stabilizer, and 1-3 parts of lubricant.

[0012] Preferably, the antioxidant includes one or more of antioxidant 1010, antioxidant 1076, and antioxidant BHT; The light stabilizer includes one or both of the light stabilizer UV-327 and the light stabilizer UV-531; The lubricant includes polyethylene wax.

[0013] Preferably, the plasticizer includes one or two of dioctyl phthalate and diisononyl phthalate; The pigment includes one or both of anatase titanium dioxide and rutile titanium dioxide.

[0014] This invention also proposes a method for preparing a pressure-resistant hot-melt pavement marking paint, comprising the following steps: After blending petroleum resin, EVA resin, and PFA resin, the remaining components other than the filler are added, and the mixture is stirred evenly. Then, the filler is added and stirred evenly to obtain the compressive heat-melt pavement marking paint.

[0015] The beneficial effects of this invention are as follows: This invention relates to a pressure-resistant hot-melt pavement marking paint, which uses petroleum resin as the main resin base and incorporates EVA resin, PFA resin, fillers, glass microspheres, and plasticizers to prepare a hot-melt pavement marking paint with a stable internal structure and good mechanical properties. Specifically, the introduction of PFA resin into the hot-melt pavement marking paint, a perfluoroalkoxy resin copolymerized from perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene, offers superior processing performance compared to conventional fluorinated polysaccharides. Furthermore, PFA resin possesses excellent compressive strength. Its introduction into the hot-melt pavement marking paint not only provides pressure resistance but also, as an organic polymer component, effectively fills the spaces between the fillers forming the supporting framework, thereby better dispersing stress. Therefore, the combined use of PFA resin and fillers in the pressure-resistant hot-melt pavement marking paint significantly improves its mechanical properties. Detailed Implementation

[0016] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will be described through embodiments.

[0018] A specific embodiment of the first aspect of the present invention provides a pressure-resistant hot-melt pavement marking paint, the raw materials of which include the following components in parts by weight: 25-35 parts petroleum resin, 4-8 parts EVA resin, 2-6 parts PFA resin, 45-64 parts filler, 20-25 parts glass microspheres, 2-5 parts pigment, and 2-4 parts plasticizer.

[0019] In this invention, petroleum resin, as the main resin in the hot-melt pavement marking paint, can bind together various components such as fillers, EVA resin, and PFA resin in the paint to form a uniform and stable coating structure. The petroleum resin can be any petroleum resin in the art that can be used in hot-melt pavement marking paints, such as C5 petroleum resin or C9 petroleum resin, preferably C5 petroleum resin. Compared to C9 petroleum resin, C5 petroleum resin, as the main resin in the hot-melt pavement marking paint of this invention, has better compatibility with the components and a superior film-forming effect.

[0020] In this invention, EVA resin is present as an additive, which can improve the flexibility of hot-melt pavement marking paint to a certain extent, making the hot-melt pavement marking paint less prone to brittleness due to temperature changes. At the same time, the combined use of EVA resin and plasticizer can also improve the processing performance of hot-melt pavement marking paint, making it easier to flow and apply during the hot-melt process.

[0021] In this invention, PFA resin is a perfluoroalkoxy resin copolymerized from perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. Adding PFA resin to hot-melt pavement marking paint, along with fillers, can make the internal structure of the paint more compact and improve the mechanical properties of the hot-melt pavement marking paint.

[0022] In this invention, the filler can be any filler that can be used in hot-melt pavement marking paints in the art, such as calcium carbonate, quartz sand, talc, wollastonite, and mullite powder, preferably calcium carbonate and mullite powder. The addition of fillers to hot-melt pavement marking paint can provide basic skeletal support for the paint, and at the same time, it can also give the paint basic wear resistance, enabling it to better withstand the heavy pressure from vehicles and other external forces such as friction. In this invention, the average particle size of calcium carbonate is 30~80μm, for example, it can be 30μm, 40μm, 50μm, 60μm, 70μm, or 80μm, preferably 40~70μm, and more preferably 50μm; the average particle size of mullite powder is 0.2~1μm, for example, it can be 0.2μm, 0.3μm, 0.4μm, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, or 1.0μm, preferably 0.4~0.8μm, and more preferably 0.6μm.

[0023] In this invention, glass microspheres serve as a reflective material in hot-melt pavement marking paint. Their uniform distribution within the paint allows the markings to exhibit excellent reflectivity at night or under low-light conditions, thereby improving road safety. The average particle size of the glass microspheres in this invention is 300-800 μm, for example, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, or 800 μm, preferably 400-600 μm, and more preferably 500 μm. In this invention, when the average particle size of the glass microspheres is 400-600 μm, the reflectivity in the hot-melt pavement marking paint is even better.

[0024] In this invention, pigments can impart a specific color to the hot-melt pavement marking paint. The pigments used in this hot-melt pavement marking paint can be any pigment suitable for hot-melt pavement marking paints in the art, such as anatase titanium dioxide or rutile titanium dioxide, preferably rutile titanium dioxide. Compared to anatase titanium dioxide, rutile titanium dioxide has better weather resistance and can better resist ultraviolet radiation, ensuring the long-term visibility of the markings.

[0025] In one embodiment of the present invention, the weight ratio of filler to PFA resin is 50:3~5.

[0026] In this invention, by optimizing the ratio of filler and PFA resin content, when the weight ratio of filler to PFA resin is 50:3~5, the mechanical properties of hot-melt pavement marking paint can be further improved, thereby further increasing its compressive strength.

[0027] In one embodiment of the present invention, the raw material for the filler comprises the following components in parts by weight: 10-15 parts calcium carbonate, 5-10 parts mullite powder.

[0028] In one embodiment of the present invention, the raw material for the filler comprises the following components in parts by weight: 10-15 parts calcium carbonate, 5-10 parts mullite powder, and 25-30 parts silicone-acrylic emulsion.

[0029] In this invention, the filler raw materials include calcium carbonate, mullite powder, and silicone-acrylic emulsion. By laminating silicone-acrylic emulsion onto the surface of calcium carbonate and mullite powder, the stable structure of calcium carbonate and mullite powder in the marking paint can be improved, so that it will not easily wear off and fall off when subjected to external friction. In addition, after the calcium carbonate and mullite powder are surface treated with silicone-acrylic emulsion, they can also better resist the erosion of the marking by the external environment, thereby enabling them to exert good wear resistance.

[0030] In one embodiment of the present invention, the method for preparing the filler includes the following steps: Calcium carbonate and mullite powder are mixed, added to silicone-acrylic emulsion, dispersed, and dried to obtain the filler.

[0031] In one embodiment of the present invention, dispersion is carried out by stirring at a speed of 400-600 rpm for a duration of 1.5-2.5 h.

[0032] In one embodiment of the present invention, the viscosity of the silicone-acrylic emulsion is 1000~4000cps and the solid content is 47%~49%.

[0033] In this invention, the viscosity of the silicone-acrylic emulsion is 1000~4000 cps, for example, it can be 1000 cps, 1500 cps, 2000 cps, 2500 cps, 3000 cps, 3500 cps, or 4000 cps, preferably 2000~3000 cps, more preferably 2500 cps; the solid content is 47%~49%, for example, it can be 47%, 48%, or 49%, preferably 48%.

[0034] In one embodiment of the present invention, the raw materials also include 1-2 parts of antioxidant, 1-2 parts of light stabilizer, and 1-3 parts of lubricant.

[0035] In one embodiment of the present invention, the antioxidant includes one or more of antioxidant 1010, antioxidant 1076, and antioxidant BHT, preferably antioxidant 1010; The light stabilizer includes one or both of the light stabilizer UV-327 and the light stabilizer UV-531, preferably the light stabilizer UV-531; Lubricants include polyethylene wax.

[0036] In one embodiment of the present invention, the plasticizer includes one or two of dioctyl phthalate and diisononyl phthalate, preferably dioctyl phthalate; The pigments include one or both of anatase titanium dioxide and rutile titanium dioxide, preferably rutile titanium dioxide.

[0037] A second aspect of the present invention provides a method for preparing a pressure-resistant hot-melt pavement marking paint, used to prepare the pressure-resistant hot-melt pavement marking paint provided in the first aspect of the present invention, comprising the following steps: After blending petroleum resin, EVA resin, and PFA resin, the remaining components except for the filler are added and mixed evenly. Then, the filler is added and mixed evenly to obtain a pressure-resistant hot-melt pavement marking paint.

[0038] Detailed information on some of the components used in the following examples and comparative examples is as follows: C5 petroleum resin, model A4100; EVA resin, model VA810; PFA resin, model P-802UP; Polytetrafluoroethylene, model number M532; The glass microspheres are solid glass microspheres with an average particle size of 400 μm. Calcium carbonate, specifically heavy calcium carbonate, with an average particle size of 50 μm; Mullite powder with an average particle size of 0.6 μm; Silicone-acrylic emulsion, model BF-400, solid content 48%, viscosity 2500cps; The polyurethane emulsion, model F0410, has a viscosity of 800 mPa·s and a solid content of 40%.

[0039] Example 1 A method for preparing a pressure-resistant hot-melt pavement marking paint includes the following steps: After blending 25 parts of C5 petroleum resin, 4 parts of EVA resin and 2 parts of PFA resin, add 20 parts of glass microspheres, 2 parts of rutile titanium dioxide, 2 parts of dioctyl phthalate, 1 part of antioxidant 1010, 1 part of light stabilizer UV-531 and 1 part of polyethylene wax, mix evenly, add 64 parts of filler (calcium carbonate and mullite powder in a weight ratio of 3:1), mix evenly, and obtain a pressure-resistant hot-melt pavement marking paint.

[0040] Example 2 A method for preparing a pressure-resistant hot-melt pavement marking paint includes the following steps: After mixing 30 parts of C5 petroleum resin, 6 parts of EVA resin and 2 parts of PFA resin, 25 parts of glass microspheres, 4 parts of rutile titanium dioxide, 3 parts of dioctyl phthalate, 2 parts of antioxidant 1010, 2 parts of light stabilizer UV-531 and 2 parts of polyethylene wax are added and mixed evenly. Then, 50 parts of filler (calcium carbonate and mullite powder in a weight ratio of 3:1) are added and mixed evenly to obtain a pressure-resistant hot-melt pavement marking paint.

[0041] Example 3 A method for preparing a pressure-resistant hot-melt pavement marking paint includes the following steps: After blending 35 parts of C5 petroleum resin, 8 parts of EVA resin and 5 parts of PFA resin, add 25 parts of glass microspheres, 5 parts of rutile titanium dioxide, 4 parts of dioctyl phthalate, 2 parts of antioxidant 1010, 2 parts of light stabilizer UV-531 and 3 parts of polyethylene wax, mix evenly, add 45 parts of filler (calcium carbonate and mullite powder in a weight ratio of 3:1), mix evenly, and obtain a pressure-resistant hot-melt pavement marking paint.

[0042] Example 4 The only difference between this embodiment and Embodiment 2 is that in this embodiment, 3 parts of PFA resin are added.

[0043] Example 5 The only difference between this embodiment and Embodiment 2 is that in this embodiment, 5 parts of PFA resin are added.

[0044] Example 6 The only difference between this embodiment and Embodiment 2 is that in this embodiment, 6 parts of PFA resin are added.

[0045] Example 7 A method for preparing a pressure-resistant hot-melt pavement marking paint includes the following steps: After mixing 30 parts of C5 petroleum resin, 6 parts of EVA resin and 2 parts of PFA resin, add 25 parts of glass microspheres, 4 parts of rutile titanium dioxide, 3 parts of dioctyl phthalate, 2 parts of antioxidant 1010, 2 parts of light stabilizer UV-531 and 2 parts of polyethylene wax, mix evenly, add 50 parts of filler, mix evenly, and obtain a pressure-resistant hot melt road marking paint. The method for preparing the filler includes the following steps: 15 parts calcium carbonate and 5 parts mullite powder were mixed together and added to 25 parts silicone acrylic emulsion. The mixture was stirred at 400 rpm for 2.5 hours and then dried to obtain the filler.

[0046] Example 8 A method for preparing a pressure-resistant hot-melt pavement marking paint includes the following steps: After mixing 30 parts of C5 petroleum resin, 6 parts of EVA resin and 2 parts of PFA resin, add 25 parts of glass microspheres, 4 parts of rutile titanium dioxide, 3 parts of dioctyl phthalate, 2 parts of antioxidant 1010, 2 parts of light stabilizer UV-531 and 2 parts of polyethylene wax, mix evenly, add 50 parts of filler, mix evenly, and obtain a pressure-resistant hot melt road marking paint. The method for preparing the filler includes the following steps: 10 parts calcium carbonate and 10 parts mullite powder were mixed together and added to 25 parts silicone acrylic emulsion. The mixture was stirred at 600 rpm for 1.5 hours and then dried to obtain the filler.

[0047] Example 9 The only difference between this embodiment and embodiment 8 is that in the preparation method of the filler in this embodiment, 20 parts of silicone-acrylic emulsion are added.

[0048] Example 10 The only difference between this embodiment and Embodiment 8 is that in the preparation method of the filler in this embodiment, 35 parts of silicone-acrylic emulsion are added.

[0049] Example 11 The only difference between this embodiment and Embodiment 8 is that in the preparation method of the filler in this embodiment, the silicone-acrylic emulsion is replaced with an equal amount of polyurethane emulsion.

[0050] Comparative Example 1 A method for preparing a pressure-resistant hot-melt pavement marking paint includes the following steps: After blending 30 parts of C5 petroleum resin and 6 parts of EVA resin, add 25 parts of glass microspheres, 4 parts of rutile titanium dioxide, 3 parts of dioctyl phthalate, 2 parts of antioxidant 1010, 2 parts of light stabilizer UV-531 and 2 parts of polyethylene wax, mix evenly, add 52 parts of filler (calcium carbonate and mullite powder in a weight ratio of 3:1), mix evenly, and obtain a pressure-resistant hot-melt pavement marking paint.

[0051] Comparative Example 2 The only difference between this comparative example and Example 2 is that in this comparative example, the PFA resin is replaced with an equal amount of polytetrafluoroethylene.

[0052] Experimental Example 1 The hot-melt pavement marking paints prepared in Examples 1-6 and Comparative Examples 1-2 were tested for compressive strength according to the method in JT / T 280-2022 "Pavement Marking Paints", where the temperature was 23℃ during the test; the test results are shown in Table 1.

[0053] Table 1. Compressive strength test results of Examples 1-6 and Comparative Examples 1-2

[0054] Compared with Comparative Examples 1-2, the compressive strength of the hot-melt pavement marking paints prepared in Examples 1-6 was improved, indicating that the introduction of PFA resin into the hot-melt pavement marking paint and its use in conjunction with fillers can effectively improve the mechanical properties of the hot-melt pavement marking paint.

[0055] Experimental Example 2 The hot-melt pavement marking paints prepared in Examples 6-11 were subjected to abrasion resistance tests according to the methods in JT / T 280-2022 "Pavement Marking Paints". The test results are shown in Table 2.

[0056] Table 2. Abrasion resistance test results of Examples 6-11

[0057] Compared with Examples 6 and 11, the wear of the hot-melt pavement marking paints prepared in Examples 7-10 was reduced, indicating that when the filler is prepared by combining calcium carbonate, mullite powder and silicone-acrylic emulsion, it is more beneficial to improve the wear resistance of the hot-melt pavement marking paint than using calcium carbonate and mullite powder alone.

[0058] Compared with Examples 9-10, the wear amount in Examples 7-8 was further reduced, indicating that when the amount of silicone-acrylic emulsion is 25-30 parts, the composite effect with calcium carbonate and mullite powder is better and more conducive to improving wear resistance.

[0059] 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 pressure-resistant hot-melt pavement marking paint, characterized in that, The raw materials consist of the following components in parts by weight: 25-35 parts petroleum resin, 4-8 parts EVA resin, 2-6 parts PFA resin, 45-64 parts filler, 20-25 parts glass microspheres, 2-5 parts pigment, and 2-4 parts plasticizer.

2. The compressive-resistant hot-melt pavement marking paint according to claim 1, characterized in that, The weight ratio of the filler to the PFA resin is 50:3~5.

3. The compressive-resistant hot-melt pavement marking paint according to claim 1, characterized in that, The raw material for the filler comprises the following components in parts by weight: 10-15 parts calcium carbonate, 5-10 parts mullite powder, and 25-30 parts silicone-acrylic emulsion.

4. The compressive-resistant hot-melt pavement marking paint according to claim 3, characterized in that, The method for preparing the filler includes the following steps: The calcium carbonate and mullite powder are mixed together, added to the silicone-acrylic emulsion, dispersed, and dried to obtain the filler.

5. The compressive-resistant hot-melt pavement marking paint according to claim 3, characterized in that, The viscosity of the silicone-acrylic emulsion is 1000~4000cps, and the solid content is 47%~49%.

6. The compressive-resistant hot-melt pavement marking paint according to claim 1, characterized in that, The average particle size of the glass microspheres is 300~800μm.

7. The compressive-resistant hot-melt pavement marking paint according to claim 1, characterized in that, The raw materials also include 1-2 parts antioxidant, 1-2 parts light stabilizer, and 1-3 parts lubricant.

8. The compressive-resistant hot-melt pavement marking paint according to claim 7, characterized in that, The antioxidants include one or more of antioxidant 1010, antioxidant 1076, and antioxidant BHT; The light stabilizer includes one or both of the light stabilizer UV-327 and the light stabilizer UV-531; The lubricant includes polyethylene wax.

9. The compressive-resistant hot-melt pavement marking paint according to claim 1, characterized in that, The plasticizer includes one or both of dioctyl phthalate and diisononyl phthalate; The pigment includes one or both of anatase titanium dioxide and rutile titanium dioxide.

10. A method for preparing a pressure-resistant hot-melt pavement marking paint, used to prepare a pressure-resistant hot-melt pavement marking paint as described in any one of claims 1 to 9, characterized in that, Includes the following steps: After blending petroleum resin, EVA resin, and PFA resin, the remaining components other than the filler are added, and the mixture is stirred evenly. Then, the filler is added and stirred evenly to obtain the compressive heat-melt pavement marking paint.

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