A high-toughness hot-melt marking paint and its preparation method

Abstract

This invention relates to the field of road marking technology, and proposes a high-toughness hot-melt road marking paint and its preparation method. The high-toughness hot-melt road marking paint comprises the following raw materials in parts by weight: 30-35 parts petroleum resin, 20-30 parts glass beads, 30-40 parts talc powder, 0.5-1 part ultraviolet stabilizer, 1-2 parts plasticizer, 1-2 parts 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid, 0.5-1 part antioxidant, and 1-2 parts defoamer. This technical solution solves the problem of low toughness and wear resistance in related technologies for hot-melt road marking paints.

Description

Technical Field

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

[0002] Road marking paint is a type of paint applied to roads to mark road markings. Traffic safety management departments use road marking paint to delineate vehicle lanes, thereby strengthening traffic safety management and reducing accidents. Currently, road marking paints are broadly classified into three categories: normal temperature paint, hot-melt paint, and two-component paint. Among these, hot-melt paint is widely used in road marking construction due to its characteristics of rapid drying, strong nighttime reflectivity, and good environmental performance. Good toughness and abrasion resistance allow hot-melt paint to better adhere to the road surface during construction, forming a stable coating and extending its service life. Therefore, to improve the lifespan of hot-melt paint, higher requirements are placed on its toughness and abrasion resistance. Summary of the Invention

[0003] This invention proposes a high-toughness hot-melt marking paint and its preparation method, which solves the problem of low toughness and wear resistance of hot-melt marking paint in related technologies.

[0004] The technical solution of the present invention is as follows:

[0005] This invention proposes a high-toughness hot-melt road marking coating, comprising the following raw materials in parts by weight: 30-35 parts petroleum resin, 20-30 parts glass beads, 30-40 parts talc, 0.5-1 part ultraviolet stabilizer, 1-2 parts plasticizer, 1-2 parts 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid, 0.5-1 part antioxidant, and 1-2 parts defoamer.

[0006] As a further technical solution, the particle size of the talc powder is 325 mesh.

[0007] As a further technical solution, the petroleum resin is C5 petroleum resin.

[0008] As a further technical solution, the ultraviolet stabilizer is a hindered amine ultraviolet stabilizer.

[0009] As a further technical solution, the ultraviolet stabilizer is BASF's Tinuvin 770DF light stabilizer.

[0010] As a further technical solution, the talc powder is modified by a modifier before use, the modifier being 2-naphthylamine-4,8-disulfonic acid and / or hydroxynonylbenzenesulfonic acid.

[0011] As a further technical solution, the amount of the modifier added is 2% to 3% of the mass of talc.

[0012] As a further technical solution, the modifier is 2-naphthylamine-4,8-disulfonic acid and hydroxynonylbenzenesulfonic acid.

[0013] As a further technical solution, the mass ratio of the hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid is 1:1~4.

[0014] This invention discovers that when talc powder is treated with hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid in a mass ratio of 1:1 to 4, the compressive strength and wear resistance of high-toughness hot-melt road marking paint can be further improved, better meeting the needs of use.

[0015] As a further technical solution, the mass ratio of the hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid is 1:3.

[0016] This invention discovers that by limiting the mass ratio of hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid to 1:3, the compressive strength and abrasion resistance of hot-melt road marking paint can be further improved.

[0017] As a further technical solution, the modification treatment method for the talc powder before use is as follows: add the modifier and talc powder to the solvent and mix them evenly to carry out the modification.

[0018] As a further technical solution, the modification temperature is 50~60℃ and the modification time is 2~3h.

[0019] As a further technical solution, the plasticizer includes one or more of dioctyl phthalate, dioctyl terephthalate, and dioctyl adipate.

[0020] As a further technical solution, the antioxidant includes one or both of antioxidants BHA and BHT.

[0021] As a further technical solution, the defoamer includes one or more of dioctyl adipate, polydimethylsiloxane, and polyoxypropylene glycerol ether.

[0022] The present invention also proposes a method for preparing a high-toughness hot-melt road marking paint, comprising the following steps: mixing the raw materials evenly to obtain a high-toughness hot-melt road marking paint.

[0023] The working principle and beneficial effects of this invention are as follows:

[0024] In this invention, petroleum resin is used as the main raw material for hot-melt road markings, which improves the adhesion between the markings and the road surface, making the markings less prone to detachment. Furthermore, it offers advantages such as rapid drying and ease of operation during construction, making it suitable for large-scale operations. Glass beads possess excellent reflectivity, abrasion resistance, and weather resistance, enhancing road safety and extending the service life of vehicles. Talc effectively reduces the cost of hot-melt road marking paint while improving abrasion resistance and weather resistance. The addition of 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid enhances the toughness of the hot-melt road marking paint while maintaining high abrasion resistance. Detailed Implementation

[0025] 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.

[0026] In the following embodiments and comparative examples:

[0027] C5 petroleum resin: Model 4#, manufactured by Shanghai Sanlian Industrial Co., Ltd.

[0028] Glass beads: 40-60 mesh, manufactured by Langfang Senno Glass Microbeads Co., Ltd.

[0029] The UV stabilizer is BASF's Tinuvin 770DF light stabilizer.

[0030] Example 1

[0031] A high-toughness hot-melt road marking paint is obtained by mixing 30 parts of C5 petroleum resin, 20 parts of glass beads, 30 parts of talc powder (325 mesh particle size), 0.5 parts of ultraviolet stabilizer, 1 part of dioctyl phthalate, 1 part of 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid, 0.5 parts of antioxidant BHA, and 1 part of dioctyl adipate evenly.

[0032] Example 2

[0033] A high-toughness hot-melt road marking paint was obtained by mixing 33 parts of C5 petroleum resin, 25 parts of glass beads, 35 parts of talc powder (325 mesh particle size), 0.8 parts of ultraviolet stabilizer, 1.5 parts of dioctyl terephthalate, 1.5 parts of 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid, 0.8 parts of antioxidant BHA, and 1.5 parts of polydimethylsiloxane evenly.

[0034] Example 3

[0035] A high-toughness hot-melt road marking paint is obtained by mixing 35 parts of C5 petroleum resin, 30 parts of glass beads, 40 parts of talc powder (particle size 325 mesh), 1 part of ultraviolet stabilizer, 2 parts of dioctyl adipate, 2 parts of 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid, 1 part of antioxidant BHT, and 2 parts of polyoxypropylene glycerol ether evenly.

[0036] Example 4

[0037] The only difference between this embodiment and Example 1 is that the talc powder is modified before use. The modification process is as follows: 50g of talc powder (particle size 325 mesh) and 1g of hydroxynonylbenzenesulfonic acid are added to 300mL of water and mixed evenly. After modification at 50℃ for 3h, the mixture is dried.

[0038] Example 5

[0039] The only difference between this embodiment and Example 1 is that the talc powder is modified before use. The modification process is as follows: 50g of talc powder (325 mesh) and 1.5g of hydroxynonylbenzenesulfonic acid are added to 300mL of water and mixed evenly. After modification at 55℃ for 2.5h, the mixture is dried.

[0040] Example 6

[0041] The only difference between this embodiment and Example 1 is that the talc powder is modified before use. The modification process is as follows: 50g of talc powder (particle size 325 mesh) and 2g of hydroxynonylbenzenesulfonic acid are added to 300mL of water and mixed evenly. After modification at 60℃ for 2 hours, the mixture is dried.

[0042] Example 7

[0043] The only difference between this embodiment and Example 4 is that hydroxynonylbenzenesulfonic acid is replaced with an equal amount of 2-naphthylamine-4,8-disulfonic acid.

[0044] Example 8

[0045] The only difference between this embodiment and Example 4 is that hydroxynonylbenzenesulfonic acid is replaced with hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid in a mass ratio of 3:1.

[0046] Example 9

[0047] The only difference between this embodiment and Example 4 is that hydroxynonylbenzenesulfonic acid is replaced with hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid in a mass ratio of 1:6.

[0048] Example 10

[0049] The only difference between this embodiment and Example 4 is that hydroxynonylbenzenesulfonic acid is replaced with hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid in a mass ratio of 1:1.

[0050] Example 11

[0051] The only difference between this embodiment and Example 4 is that hydroxynonylbenzenesulfonic acid is replaced with hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid in a mass ratio of 1:3.

[0052] Example 12

[0053] The only difference between this embodiment and Example 4 is that hydroxynonylbenzenesulfonic acid is replaced with hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid in a mass ratio of 1:4.

[0054] Comparative Example 1

[0055] The only difference between this comparative example and Example 1 is that 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid was not added.

[0056] Test case

[0057] The hot-melt road marking paints from Examples 1-12 and Comparative Example 1 were melt-sprayed onto cement asbestos boards (spray thickness 2 mm). The abrasion rate, compressive strength (23±1℃), and low-temperature crack resistance were measured according to JT / T 280-2022 "Road Marking Paints". The evaluation standard for low-temperature crack resistance was: maintaining at -10℃ for 4 hours and placing at room temperature for 4 hours as one cycle. After 4 consecutive cycles, the presence or absence of cracks was determined. The test results are shown in Table 1.

[0058] Table 1. Performance test results of hot-melt road marking paints in Examples 1-12 and Comparative Example 1

[0059]

[0060] Compared with Example 1, Comparative Example 1 did not add 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid. As a result, the compressive strength of the hot-melt marking paint in Comparative Example 1 was lower than that in Example 1, the wear was higher than that in Example 1, and cracks appeared at low temperature. This indicates that the addition of 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid can improve the compressive strength, wear resistance and toughness of the hot-melt marking paint.

[0061] Compared with Example 1, the talc powder in Example 4 was modified with hydroxynonylbenzenesulfonic acid, the talc powder in Example 7 was modified with 2-naphthylamine-4,8-disulfonic acid, and the talc powder in Example 8 was modified with both hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid. The results showed that the compressive strength of the hot-melt marking paint in Example 8 was higher than that in Examples 1, 4, and 7, while the wear resistance was lower than that in Examples 1, 4, and 7. This indicates that the simultaneous treatment of talc powder with hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid can improve the compressive strength and wear resistance of the hot-melt marking paint.

[0062] Compared with Example 8, the addition amounts of hydroxynonylbenzenesulfonic acid and 2-naphthylamine-4,8-disulfonic acid were changed in Examples 9-12. As a result, the compressive strength of the hot-melt marking paint in Examples 10-12 was higher than that in Examples 8 and 9, and the abrasion was lower than that in Examples 8 and 9. This indicates that when the mass ratio of hydroxynonylbenzenesulfonic acid to 2-naphthylamine-4,8-disulfonic acid is 1:1 to 4, the compressive strength and abrasion resistance of the hot-melt marking paint can be further improved.

[0063] 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 high-toughness hot-melt road marking paint, characterized in that, The raw materials include the following components by weight: 30-35 parts petroleum resin, 20-30 parts glass beads, 30-40 parts talc, 0.5-1 part ultraviolet stabilizer, 1-2 parts plasticizer, 1-2 parts 2-(2-carboxyethylamino)-4-aminobenzenesulfonic acid, 0.5-1 part antioxidant, and 1-2 parts defoamer; the talc is modified by a modifier before use, the modifier being 2-naphthylamine-4,8-disulfonic acid and hydroxynonylbenzenesulfonic acid.

2. The high-toughness hot-melt marking paint according to claim 1, characterized in that, The petroleum resin is C5 petroleum resin.

3. The high-toughness hot-melt marking paint according to claim 1, characterized in that, The UV stabilizer is a hindered amine UV stabilizer.

4. The high-toughness hot-melt marking paint according to claim 1, characterized in that, The modification treatment method for talc powder before use is as follows: add the modifier and talc powder to the solvent and mix them evenly to carry out the modification.

5. The high-toughness hot-melt marking paint according to claim 1, characterized in that, The plasticizer includes one or more of dioctyl phthalate, dioctyl terephthalate, and dioctyl adipate.

6. The high-toughness hot-melt marking paint according to claim 1, characterized in that, The antioxidants include one or both of the antioxidants BHA and BHT.

7. The high-toughness hot-melt marking paint according to claim 1, characterized in that, The defoamer includes one or more of polyoxyethylene polyoxypropylene pentaerythritol ether, polydimethylsiloxane, and polyoxypropylene glycerol ether.

8. A method for preparing a high-toughness hot-melt road marking paint according to any one of claims 1 to 7, characterized in that, Includes the following steps: After the raw materials are mixed evenly, a high-toughness hot-melt marking paint is obtained.

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