A non-slip and wear-resistant coating, its preparation method, and its application in basketball courts.

Abstract

This invention discloses an anti-slip and wear-resistant coating, its preparation method, and its application in basketball courts, relating to the field of coating technology. In preparing the anti-slip and wear-resistant coating, firstly, vinyl diphenylphosphine is grafted onto epoxy resin and then reacted with epichlorohydrin to obtain a modified epoxy resin; then, 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride are reacted to obtain a UV-absorbing monomer; then, aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, and the UV-absorbing monomer are reacted to obtain modified titanium dioxide nanosheets; finally, the modified epoxy resin, modified titanium dioxide nanosheets, ceramsite sand, defoamer, leveling agent, curing agent, and diluent are mixed to obtain an anti-slip and wear-resistant coating material, which is then coated and cured to obtain the anti-slip and wear-resistant coating. The anti-slip and wear-resistant coating prepared by this invention has excellent anti-slip, wear-resistant, flame-retardant, UV-resistant, and antibacterial properties.

Description

Technical Field

[0001] This invention relates to the field of coating technology, specifically to an anti-slip and wear-resistant coating, its preparation method, and its application in basketball courts. Background Technology

[0002] Epoxy resin coatings have gradually become the preferred material for basketball court surface coatings due to their high strength and wear resistance. However, during the long-term use of basketball courts, the mechanical properties of the surface coating often decline due to frequent sports impacts and friction. Outdoor basketball court surface coatings are prone to aging due to prolonged exposure to sunlight, which can accelerate the decline in mechanical properties and even cause cracks and peeling. In addition, in terms of safety, epoxy resin itself is flammable. In some accidental situations, its flammability may pose a safety hazard. Once a fire occurs, the combustion of epoxy resin will produce a large amount of dense smoke and toxic gases.

[0003] To avoid problems such as wear, insufficient UV aging resistance, and inadequate flame retardancy that occur with epoxy resin coatings during use, developing a new type of basketball court surface coating that integrates anti-slip, wear-resistant, UV-resistant, and flame-retardant properties is particularly urgent and important. Such a coating can not only improve the performance and safety of basketball courts but also create a healthier and safer sports environment for athletes. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-slip and wear-resistant coating, its preparation method, and its application in basketball courts, so as to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A non-slip and wear-resistant coating, characterized in that it is obtained by coating and curing a non-slip and wear-resistant paint, wherein the non-slip and wear-resistant paint mainly comprises: by weight parts, 100 parts modified epoxy resin, 3-4 parts modified titanium dioxide nanosheets, 2-3 parts ceramsite sand, 1-2 parts defoamer, 1-2 parts leveling agent, 22-24 parts curing agent, and 30-35 parts diluent.

[0007] As an optimization, the modified epoxy resin is obtained by grafting vinyl diphenylphosphine onto epoxy resin and then reacting it with epichlorohydrin.

[0008] As an optimization, the modified titanium dioxide nanosheets are obtained by reacting aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, and a UV-absorbing monomer; the UV-absorbing monomer is obtained by reacting 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride.

[0009] A method for preparing an anti-slip and wear-resistant coating includes the following preparation steps:

[0010] (1) Weigh epoxy resin and vinyl diphenylphosphine at a mass ratio of 1:(0.3-0.4). Mix epoxy resin and propylene glycol methyl ether at a mass ratio of 1:(1.8-2.0) at 110℃ for 3-5 min to obtain solution A. Mix vinyl diphenylphosphine, azobisisobutyronitrile, and propylene glycol methyl ether at a mass ratio of 1:(0.06-0.08):(2-3) to obtain solution B. Add solution B dropwise to solution A at a drop rate of 1 mL / min. After the dropwise addition is completed, raise the temperature to 115℃ and continue the reaction for 3-4 h. Cool the temperature to 70-80℃ and add epichlorohydrin at a mass ratio of 0.3-0.4 times that of vinyl diphenylphosphine to continue the reaction for 3-4 h. Remove propylene glycol methyl ether by rotary evaporation under reduced pressure to obtain modified epoxy resin.

[0011] (2) Weigh 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride in a molar ratio of 1:2. Mix chloroacetyl chloride and tetrahydrofuran in a mass ratio of 1:(20-30) to obtain a chloroacetyl chloride solution. Mix 2,2',4,4'-tetrahydroxybenzophenone, triethylamine, and tetrahydrofuran in a mass ratio of 1:(0.7-0.9):(20-30). Add the chloroacetyl chloride solution dropwise at 4-8℃ at a rate of 0.6 mL / min. After the addition is complete, continue the reaction at 4-8℃ for 5-6 h. After the reaction is complete, add 80-100 times the mass of 2,2',4,4'-tetrahydroxybenzophenone in an ice-water mixture. Filter and wash 3-4 times with saturated sodium bicarbonate solution. Dry at room temperature for 10-12 h to obtain the ultraviolet-absorbing monomer.

[0012] (3) Aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, UV-absorbing monomer, triethylamine, and N,N-dimethylformamide were mixed in a mass ratio of 1:(1.5-2):(1.7-1.9):(0.5-0.7):(40-50), heated to 90-95℃, reacted for 4-5 h, cooled to room temperature, filtered, and washed 3-4 times with pure water. The mixture was then dried at 60℃ for 10-12 h to obtain modified titanium dioxide nanosheets.

[0013] (4) Weigh the following components by mass: 100 parts modified epoxy resin, 3-4 parts modified titanium dioxide nanosheets, 2-3 parts ceramsite sand, 1-2 parts defoamer, 1-2 parts leveling agent, 22-24 parts curing agent, and 30-35 parts diluent. Mix the above components evenly and apply them to the substrate surface using a coater. After curing, an anti-slip and wear-resistant coating is obtained.

[0014] As an optimization, the preparation method of the aminated titanium dioxide nanosheets in step (3) is as follows: Tetrabutyl titanate and 36wt% hydrofluoric acid solution are mixed at a volume ratio of 1:(0.12-0.14), and reacted at 180℃ for 24h in a high-pressure reactor. After the reaction is completed, the mixture is cooled to room temperature, washed three times each with 0.1mol / L sodium hydroxide solution and pure water, dried at 80℃ for 4-6h, calcined in a muffle furnace at 400℃ for 2h, and finally passed through a 200-mesh sieve to obtain titanium dioxide nanosheets. Titanium dioxide nanosheets, 3-aminopropyl-trimethoxysilane, and anhydrous ethanol are mixed at a mass ratio of 1:(0.5-0.7):(50-60), stirred at 40-50℃ for 6-8h, filtered, washed 3-4 times with pure water, and dried at 60℃ for 6-8h to obtain aminated titanium dioxide nanosheets.

[0015] As an optimization, the curing conditions in step (4) are: baking at 80°C for 30 minutes, then heating to 120°C and baking for 30 minutes.

[0016] As an optimization, the coating thickness of the coater in step (4) is 80 μm.

[0017] As an optimization, the epoxy resin used in step (1) is of type E20.

[0018] As an optimization, the particle size of the ceramsite sand in step (4) is 250-380μm; the defoamer is DC-65; the leveling agent is BYK307; the curing agent is BANCO-905; and the diluent is acetone.

[0019] As an optimization, the reaction process of the UV-absorbing monomer in step (2) is as follows:

[0020]

[0021] The present invention also provides an application of the anti-slip and wear-resistant coating prepared according to the above-described method for preparing the anti-slip and wear-resistant coating in a basketball court.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0023] In preparing the anti-slip and wear-resistant coating, this invention first grafts vinyl diphenylphosphine onto epoxy resin and then reacts it with epichlorohydrin to obtain a modified epoxy resin. Next, 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride are reacted to obtain a UV-absorbing monomer. Aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, and the UV-absorbing monomer are reacted to obtain modified titanium dioxide nanosheets. Finally, the modified epoxy resin, modified titanium dioxide nanosheets, ceramsite, defoamer, leveling agent, curing agent, and diluent are mixed to obtain the anti-slip and wear-resistant coating. The anti-slip and wear-resistant coating is then applied and cured to obtain the anti-slip and wear-resistant coating layer.

[0024] First, vinyl diphenylphosphine is grafted onto epoxy resin and then reacted with epichlorohydrin to obtain a modified epoxy resin. The carbon-carbon double bonds on vinyl diphenylphosphine are grafted onto the side chains of the epoxy resin under the action of an initiator, thereby introducing phosphorus elements with flame-retardant functions into the epoxy resin, thus endowing the coating with flame-retardant properties. Epichlorohydrin, through its reaction with phosphorus, can not only increase the epoxy group content of the epoxy resin, but also transform vinyl diphenylphosphine into a quaternary phosphate salt structure. Quaternary phosphate salt molecules can penetrate the cell membranes of bacteria or fungi, destroy the cell membrane structure, and thus inhibit or kill microorganisms. Therefore, the presence of the quaternary phosphate salt structure can endow the coating with certain antibacterial properties.

[0025] Then, a silane coupling agent is used to imbue the surface of titanium dioxide nanosheets with amino groups. As a rigid particle, titanium dioxide has high hardness and strong wear resistance, which can improve the wear resistance and impact resistance of the coating. For coatings used outdoors, it can reflect ultraviolet rays to achieve a certain function of anti-ultraviolet aging. 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride are reacted to prepare an ultraviolet absorbing monomer. The ultraviolet absorbing monomer contains acyl chloride groups at both ends. The aminated titanium dioxide is polymerized with the amino groups on the surface and the acyl chloride groups at both ends of the ultraviolet absorbing monomer and R-1,1'-bi-2-naphthylaminoamino groups to form a polymer with an ortho-hydroxybenzophenone structure on the surface of titanium dioxide. The hydroxyl and carbonyl groups in the ortho-hydroxybenzophenone structure can form a chelate ring structure. Under ultraviolet irradiation, the molecule undergoes thermal vibration, the chelate ring opens, and the light energy is converted into heat energy, thereby achieving the function of absorbing ultraviolet rays and resisting ultraviolet aging.

[0026] Finally, a non-slip and wear-resistant coating is prepared by mixing modified epoxy resin, modified titanium dioxide nanosheets, ceramsite sand, defoamer, leveling agent, curing agent and diluent. The ceramsite sand in the coating has a rough surface, which can increase the friction of the contact surface, thereby improving the non-slip performance and giving the coating non-slip properties. Detailed Implementation

[0027] 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.

[0028] In all the following examples and comparative examples, the epoxy resin used was E20; the ceramsite particle size was 250-380μm; the defoamer was DC-65; the leveling agent was BYK307; the curing agent was BANCO-905; the diluent was acetone; the substrate coated by the applicator was tinplate, and the coating thickness was 80μm.

[0029] Example 1

[0030] An anti-slip and wear-resistant coating is prepared by the following method:

[0031] (1) Weigh epoxy resin and vinyl diphenylphosphine at a mass ratio of 1:0.3. Mix epoxy resin and propylene glycol methyl ether at a mass ratio of 1:1.8 at 110℃ for 5 min to obtain solution A. Mix vinyl diphenylphosphine, azobisisobutyronitrile and propylene glycol methyl ether at a mass ratio of 1:0.06:2 to obtain solution B. Add solution B dropwise to solution A at a drop rate of 1 mL / min. After the dropwise addition is completed, raise the temperature to 115℃ and continue the reaction for 4 h. Cool down to 80℃ and add epichlorohydrin at a mass ratio of 0.3 times that of vinyl diphenylphosphine to continue the reaction for 4 h. Remove propylene glycol methyl ether by rotary evaporation under reduced pressure to obtain modified epoxy resin.

[0032] (2) Weigh 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride in a molar ratio of 1:2. Mix chloroacetyl chloride and tetrahydrofuran in a mass ratio of 1:20 to obtain a chloroacetyl chloride solution. Mix 2,2',4,4'-tetrahydroxybenzophenone, triethylamine, and tetrahydrofuran in a mass ratio of 1:0.7:20. Add the chloroacetyl chloride solution dropwise at 8°C at a rate of 0.6 mL / min. After the addition is complete, continue the reaction at 8°C for 6 h. After the reaction is complete, add an ice-water mixture with a mass of 80 times that of 2,2',4,4'-tetrahydroxybenzophenone. Filter and wash 4 times with saturated sodium bicarbonate solution. Dry at room temperature for 12 h to obtain the ultraviolet-absorbing monomer.

[0033] (3) Tetrabutyl titanate and 36wt% hydrofluoric acid solution were mixed at a volume ratio of 1:0.12 and reacted in a high-pressure reactor at 180℃ for 24h. After the reaction was completed, the mixture was cooled to room temperature, washed three times each with 0.1mol / L sodium hydroxide solution and pure water, dried at 80℃ for 6h, and then calcined in a muffle furnace at 400℃ for 2h. Finally, it was passed through a 200-mesh sieve to obtain titanium dioxide nanosheets. Titanium dioxide nanosheets, 3-aminopropyltrimethoxysilane, and anhydrous ethanol were mixed at a mass ratio of 1:0.5. The mixture was stirred at 50°C for 8 hours, filtered, washed four times with pure water, and dried at 60°C for 8 hours to obtain aminated titanium dioxide nanosheets. Aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, UV-absorbing monomer, triethylamine, and N,N-dimethylformamide were mixed at a mass ratio of 1:1.5:1.7:0.5:40, heated to 95°C, reacted for 5 hours, cooled to room temperature, filtered, washed four times with pure water, and dried at 60°C for 12 hours to obtain modified titanium dioxide nanosheets.

[0034] (4) Weigh the following components according to the mass fractions: 100 parts modified epoxy resin, 3 parts modified titanium dioxide nanosheets, 2 parts ceramsite sand, 1 part defoamer, 1 part leveling agent, 22 parts curing agent, and 30 parts diluent. Mix the above components evenly and apply them to the substrate surface using a coater. Bake at 80°C for 30 minutes, then raise the temperature to 120°C and bake for another 30 minutes to obtain an anti-slip and wear-resistant coating.

[0035] Example 2

[0036] An anti-slip and wear-resistant coating is prepared by the following method:

[0037] (1) Weigh epoxy resin and vinyl diphenylphosphine at a mass ratio of 1:0.35. Mix epoxy resin and propylene glycol methyl ether at a mass ratio of 1:1.9 at 110℃ for 4 min to obtain solution A. Mix vinyl diphenylphosphine, azobisisobutyronitrile, and propylene glycol methyl ether at a mass ratio of 1:0.07:2.5 to obtain solution B. Add solution B dropwise to solution A at a drop rate of 1 mL / min. After the dropwise addition is completed, raise the temperature to 115℃ and continue the reaction for 3.5 h. Cool down to 75℃ and add epichlorohydrin at a mass ratio of 0.35 times that of vinyl diphenylphosphine to continue the reaction for 3.5 h. Remove propylene glycol methyl ether by rotary evaporation under reduced pressure to obtain modified epoxy resin.

[0038] (2) Weigh 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride in a molar ratio of 1:2. Mix chloroacetyl chloride and tetrahydrofuran in a mass ratio of 1:25 to obtain a chloroacetyl chloride solution. Mix 2,2',4,4'-tetrahydroxybenzophenone, triethylamine, and tetrahydrofuran in a mass ratio of 1:0.8:25. Add the chloroacetyl chloride solution dropwise at 6°C at a rate of 0.6 mL / min. After the addition is complete, continue the reaction at 6°C for 5.5 h. After the reaction is complete, add a mixture of ice and water with a mass of 90 times that of 2,2',4,4'-tetrahydroxybenzophenone. Filter and wash three times with saturated sodium bicarbonate solution. Dry at room temperature for 11 h to obtain the ultraviolet-absorbing monomer.

[0039] (3) Tetrabutyl titanate and 36wt% hydrofluoric acid solution were mixed at a volume ratio of 1:0.13 and reacted in a high-pressure reactor at 180℃ for 24h. After the reaction was completed, the mixture was cooled to room temperature, washed three times each with 0.1mol / L sodium hydroxide solution and pure water, dried at 80℃ for 5h, and then calcined in a muffle furnace at 400℃ for 2h. Finally, it was passed through a 200-mesh sieve to obtain titanium dioxide nanosheets. Titanium dioxide nanosheets, 3-aminopropyltrimethoxysilane, and anhydrous ethanol were mixed at a mass ratio of 1:0.6: Mix 55g, stir at 45℃ for 7h, filter and wash three times with pure water, and dry at 60℃ for 7h to obtain aminated titanium dioxide nanosheets. Mix aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, UV-absorbing monomer, triethylamine, and N,N-dimethylformamide at a mass ratio of 1:1.7:1.8:0.6:45, heat to 93℃, react for 4.5h, cool to room temperature, filter and wash three times with pure water, and dry at 60℃ for 11h to obtain modified titanium dioxide nanosheets.

[0040] (4) Weigh the following components according to the mass percentage: 100 parts modified epoxy resin, 3.5 parts modified titanium dioxide nanosheets, 2.5 parts ceramsite sand, 1.5 parts defoamer, 1.5 parts leveling agent, 23 parts curing agent, and 33 parts diluent. Mix the above components evenly and apply them to the substrate surface using a coater. Bake at 80°C for 30 minutes, then raise the temperature to 120°C and bake for another 30 minutes to obtain an anti-slip and wear-resistant coating.

[0041] Example 3

[0042] An anti-slip and wear-resistant coating is prepared by the following method:

[0043] (1) Weigh epoxy resin and vinyl diphenylphosphine at a mass ratio of 1:0.4. Mix epoxy resin and propylene glycol methyl ether at a mass ratio of 1:2.0 at 110℃ for 3 min to obtain solution A. Mix vinyl diphenylphosphine, azobisisobutyronitrile, and propylene glycol methyl ether at a mass ratio of 1:0.08:3 to obtain solution B. Add solution B dropwise to solution A at a drop rate of 1 mL / min. After the dropwise addition is completed, raise the temperature to 115℃ and continue the reaction for 3 h. Cool down to 70℃ and add epichlorohydrin at a mass ratio of 0.4 times that of vinyl diphenylphosphine to continue the reaction for 3 h. Remove propylene glycol methyl ether by rotary evaporation under reduced pressure to obtain modified epoxy resin.

[0044] (2) Weigh 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride in a molar ratio of 1:2. Mix chloroacetyl chloride and tetrahydrofuran in a mass ratio of 1:30 to obtain a chloroacetyl chloride solution. Mix 2,2',4,4'-tetrahydroxybenzophenone, triethylamine, and tetrahydrofuran in a mass ratio of 1:0.9:30. Add the chloroacetyl chloride solution dropwise at 4℃ at a rate of 0.6 mL / min. After the addition is complete, continue the reaction at 4℃ for 5 h. After the reaction is complete, add 100 times the mass of 2,2',4,4'-tetrahydroxybenzophenone in an ice-water mixture. Filter and wash three times with saturated sodium bicarbonate solution. Dry at room temperature for 10 h to obtain the ultraviolet-absorbing monomer.

[0045] (3) Tetrabutyl titanate and 36wt% hydrofluoric acid solution were mixed at a volume ratio of 1:0.14 and reacted in a high-pressure reactor at 180℃ for 24h. After the reaction was completed, the mixture was cooled to room temperature, washed three times each with 0.1mol / L sodium hydroxide solution and pure water, dried at 80℃ for 4h, and then calcined in a muffle furnace at 400℃ for 2h. Finally, it was passed through a 200-mesh sieve to obtain titanium dioxide nanosheets. Titanium dioxide nanosheets, 3-aminopropyl-trimethoxysilane, and anhydrous ethanol were mixed at a mass ratio of 1:0.14. The mixture was stirred at 40℃ for 6 hours, filtered, washed three times with pure water, and dried at 60℃ for 6 hours to obtain aminated titanium dioxide nanosheets. Aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, UV-absorbing monomer, triethylamine, and N,N-dimethylformamide were mixed at a mass ratio of 1:2:1.9:0.7:50, heated to 90℃, reacted for 4 hours, cooled to room temperature, filtered, washed three times with pure water, and dried at 60℃ for 10 hours to obtain modified titanium dioxide nanosheets.

[0046] (4) Weigh the following components according to the mass fractions: 100 parts modified epoxy resin, 4 parts modified titanium dioxide nanosheets, 3 parts ceramsite sand, 2 parts defoamer, 2 parts leveling agent, 24 parts curing agent, and 35 parts diluent. Mix the above components evenly and apply them to the substrate surface using a coater. Bake at 80°C for 30 minutes, then raise the temperature to 120°C and bake for another 30 minutes to obtain an anti-slip and wear-resistant coating.

[0047] Comparative Example 1

[0048] The difference between Comparative Example 1 and Example 2 is that step (1) is omitted, and step (4) is modified to weigh the following components by mass: 100 parts epoxy resin, 3.5 parts modified titanium dioxide nanosheets, 2.5 parts ceramsite sand, 1.5 parts defoamer, 1.5 parts leveling agent, 23 parts curing agent, and 33 parts diluent. The above components are mixed evenly and coated onto the substrate surface using a coater. The coating is baked at 80°C for 30 minutes, and then heated to 120°C and baked for 30 minutes to obtain an anti-slip and wear-resistant coating.

[0049] Comparative Example 2

[0050] The difference between Comparative Example 2 and Example 2 is that step (1) is modified as follows: epoxy resin and vinyl diphenylphosphine are weighed at a mass ratio of 1:0.35. Epoxy resin and propylene glycol methyl ether are mixed at a mass ratio of 1:1.9 at 110°C for 4 min to obtain solution A. Vinyl diphenylphosphine, azobisisobutyronitrile, and propylene glycol methyl ether are mixed at a mass ratio of 1:0.07:2.5 to obtain solution B. Solution B is added dropwise to solution A at a dropping rate of 1 mL / min. After the addition is completed, the temperature is raised to 115°C and the reaction continues for 3.5 h. The temperature is then lowered to 75°C, and propylene glycol methyl ether is removed by rotary evaporation under reduced pressure to obtain modified epoxy resin.

[0051] Comparative Example 3

[0052] The difference between Comparative Example 3 and Example 2 is that step (3) is modified as follows: Tetrabutyl titanate and 36wt% hydrofluoric acid solution are mixed at a volume ratio of 1:0.13 and reacted at 180°C for 24 hours in a high-pressure reactor. After the reaction is completed, the mixture is cooled to room temperature, washed three times each with 0.1mol / L sodium hydroxide solution and pure water, dried at 80°C for 5 hours, calcined in a muffle furnace at 400°C for 2 hours, and finally passed through a 200-mesh sieve to obtain titanium dioxide nanosheets. Titanium dioxide nanosheets, 3-aminopropyltrimethoxysilane, and anhydrous ethanol are mixed at a mass ratio of 1:0.6:55, stirred at 45°C for 7 hours, filtered, washed three times with pure water, and dried at 60°C for 7 hours to obtain modified titanium dioxide nanosheets.

[0053] Comparative Example 4

[0054] The difference between Comparative Example 4 and Example 2 is that step (3) is omitted, and step (4) is modified as follows: Weigh the following components by mass: 100 parts modified epoxy resin, 2.5 parts ceramsite sand, 1.5 parts defoamer, 1.5 parts leveling agent, 23 parts curing agent, and 33 parts diluent. Mix the above components evenly and apply them to the substrate surface using a coater. Bake at 80°C for 30 minutes, then raise the temperature to 120°C and bake for 30 minutes to obtain an anti-slip and wear-resistant coating.

[0055] Test Example 1

[0056] Flame retardant performance testing

[0057] Test method: The limiting oxygen index of the anti-slip and wear-resistant coatings prepared in each example and comparative example was tested using a limiting oxygen index tester according to standard GB / T2406.2-2009. The results are shown in Table 1.

[0058] Table 1

[0059] Example 1 31.43 Comparative Example 1 22.73 Example 2 30.61 Comparative Example 2 31.36 Example 3 32.02 Comparative Example 3 31.69 Comparative Example 4 27.96

[0060] A comparison of the experimental data from Examples 1-3 and Comparative Examples 1-4 in Table 1 reveals that the anti-slip and wear-resistant coating prepared by the present invention has good flame-retardant properties.

[0061] By comparison, the limiting oxygen index of Examples 1-3 is greater than that of Comparative Example 1, indicating that when vinyl diphenylphosphine is grafted onto epoxy resin and then reacted with epichlorohydrin to obtain modified epoxy resin, the carbon-carbon double bonds on vinyl diphenylphosphine are grafted onto the side chains of epoxy resin under the action of an initiator, thereby introducing phosphorus elements with flame-retardant function into the epoxy resin, thus giving the coating flame-retardant properties.

[0062] Test Example 2

[0063] Impact resistance test

[0064] Test method: The impact strength of the anti-slip and wear-resistant coatings prepared in the examples and comparative examples was tested using an impact tester according to standard GB / T 1732-2020. The results are shown in Table 2.

[0065] UV aging resistance test

[0066] Test method: The anti-slip and wear-resistant coatings prepared in the examples and comparative examples were placed in an ultraviolet aging chamber for irradiation. The temperature in the aging chamber was 50℃, the irradiation time was 720h, the wavelength of the ultraviolet light was 340nm, the light power was 40W, and the distance between the coating and the light source was 50mm. The impact strength of the coating before and after ultraviolet aging was tested according to the test method for impact resistance, and the change rate W was calculated. The formula for calculating W is: W=(W0-W1) / W0*100%; W0 is the impact strength before ultraviolet aging, and W1 is the impact strength after ultraviolet aging; the results are shown in Table 2.

[0067] Table 2

[0068] Example 1 24.36 2.83 Example 2 23.54 2.76 Example 3 24.11 3.09 Comparative Example 1 22.14 3.45 Comparative Example 2 23.07 3.37 Comparative Example 3 21.75 43.24 Comparative Example 4 16.64 59.36

[0069] A comparison of the experimental data from Examples 1-3 and Comparative Examples 1-4 in Table 2 reveals that the anti-slip and wear-resistant coating prepared by this invention has good impact resistance and UV aging resistance.

[0070] By comparison, the impact strength of Examples 1-3 is greater than that of Comparative Example 4, and the rate of change of impact strength of Examples 1-3 is less than that of Comparative Examples 3 and 4. This indicates that using a silane coupling agent to imbue the surface of titanium dioxide nanosheets with amino groups, titanium dioxide, as a rigid particle, possesses high hardness and strong wear resistance, which can improve the wear resistance and impact resistance of the coating. For outdoor use, the coating can reflect ultraviolet rays to achieve a certain degree of anti-UV aging function; 2,2',4,4'-tetrahydroxybenzophenone and The ultraviolet-absorbing monomer is prepared by the reaction of chloroacetyl chloride. The ultraviolet-absorbing monomer contains acyl chloride groups at both ends. The aminated titanium dioxide is polymerized with the amino group on the surface and the acyl chloride groups at both ends of the ultraviolet-absorbing monomer and R-1,1'-bi-2-naphthylaminoamine to form a polymer with an ortho-hydroxybenzophenone structure on the surface of titanium dioxide. The hydroxyl and carbonyl groups in the ortho-hydroxybenzophenone structure can form a chelate ring structure. Under ultraviolet irradiation, the molecule undergoes thermal vibration, the chelate ring opens, and the light energy is converted into heat energy, thereby achieving the effect of absorbing ultraviolet rays and resisting ultraviolet aging.

[0071] Test Example 3

[0072] Antibacterial performance test

[0073] Test method: The anti-slip and wear-resistant coatings prepared in the examples and comparative examples were tested for antibacterial rate according to standard GB / T 21866-2008, with Staphylococcus aureus as the bacterial strain. The results are shown in Table 3.

[0074] Table 3

[0075]

[0076]

[0077] A comparison of the experimental data from Examples 1-3 and Comparative Examples 1-4 in Table 3 reveals that the anti-slip and wear-resistant coating prepared by the present invention has good antibacterial properties.

[0078] By comparison, the antibacterial rates of Examples 1-3 were better than those of Comparative Examples 1 and 2, indicating that epichlorohydrin, through its reaction with phosphorus, can not only increase the epoxy group content of epoxy resin but also transform vinyl diphenylphosphine into a quaternary phosphate structure. Quaternary phosphate molecules can penetrate the cell membranes of bacteria or fungi, destroy the cell membrane structure, and thus inhibit or kill microorganisms. Therefore, the presence of the quaternary phosphate structure can endow the coating with certain antibacterial properties.

[0079] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing an anti-slip and wear-resistant coating, characterized in that, The preparation steps include the following: (1) Weigh epoxy resin and vinyl diphenylphosphine at a mass ratio of 1:(0.3-0.4). Mix epoxy resin and propylene glycol methyl ether at a mass ratio of 1:(1.8-2.0) at 110℃ for 3-5 min to obtain solution A. Mix vinyl diphenylphosphine, azobisisobutyronitrile, and propylene glycol methyl ether at a mass ratio of 1:(0.06-0.08):(2-3) to obtain solution B. Add solution B dropwise to solution A at a drop rate of 1 mL / min. After the dropwise addition is completed, raise the temperature to 115℃ and continue the reaction for 3-4 h. Cool the temperature to 70-80℃ and add epichlorohydrin at a mass ratio of 0.3-0.4 times that of vinyl diphenylphosphine to continue the reaction for 3-4 h. Remove propylene glycol methyl ether by rotary evaporation under reduced pressure to obtain modified epoxy resin. (2) Weigh 2,2',4,4'-tetrahydroxybenzophenone and chloroacetyl chloride in a molar ratio of 1:

2. Mix chloroacetyl chloride and tetrahydrofuran in a mass ratio of 1:(20-30) to obtain a chloroacetyl chloride solution. Mix 2,2',4,4'-tetrahydroxybenzophenone, triethylamine and tetrahydrofuran in a mass ratio of 1:(0.7-0.9):(20-30). Add the chloroacetyl chloride solution dropwise at 4-8℃ at a rate of 0.6 mL / min. After the addition is complete, continue the reaction at 4-8℃ for 5-6 h. After the reaction is complete, add 80-100 times the mass of 2,2',4,4'-tetrahydroxybenzophenone in an ice-water mixture. Filter and wash 3-4 times with saturated sodium bicarbonate solution. Dry at room temperature for 10-12 h to obtain the ultraviolet-absorbing monomer. (3) Mix the aminated titanium dioxide nanosheets, R-1,1'-bi-2-naphthylamine, UV-absorbing monomer, triethylamine, and N,N-dimethylformamide in a mass ratio of 1:(1.5-2):(1.7-1.9):(0.5-0.7):(40-50), heat to 90-95℃, react for 4-5 h, cool to room temperature, filter and wash with pure water 3-4 times, and dry at 60℃ for 10-12 h to obtain modified titanium dioxide nanosheets; (4) Weigh the following components by mass: 100 parts modified epoxy resin, 3-4 parts modified titanium dioxide nanosheets, 2-3 parts ceramsite sand, 1-2 parts defoamer, 1-2 parts leveling agent, 22-24 parts curing agent, and 30-35 parts diluent. Mix the above components evenly and apply them to the substrate surface using a coater. After curing, an anti-slip and wear-resistant coating is obtained.

2. The method for preparing an anti-slip and wear-resistant coating according to claim 1, characterized in that, The preparation method of the aminated titanium dioxide nanosheets in step (3) is as follows: Tetrabutyl titanate and 36wt% hydrofluoric acid solution are mixed at a volume ratio of 1:(0.12-0.14). The mixture is reacted at 180℃ for 24h in a high-pressure reactor. After the reaction is completed, the mixture is cooled to room temperature and washed three times each with 0.1mol / L sodium hydroxide solution and pure water. The mixture is then dried at 80℃ for 4-6h and calcined in a muffle furnace at 400℃ for 2h. Finally, the mixture is passed through a 200-mesh sieve to obtain titanium dioxide nanosheets. Titanium dioxide nanosheets, 3-aminopropyltrimethoxysilane, and anhydrous ethanol are mixed at a mass ratio of 1:(0.5-0.7):(50-60). The mixture is stirred at 40-50℃ for 6-8h, filtered, and washed 3-4 times with pure water. The mixture is then dried at 60℃ for 6-8h to obtain aminated titanium dioxide nanosheets.

3. The method for preparing an anti-slip and wear-resistant coating according to claim 2, characterized in that, The curing conditions in step (4) are: bake at 80°C for 30 minutes, then raise the temperature to 120°C and bake for another 30 minutes.

4. The method for preparing an anti-slip and wear-resistant coating according to claim 2, characterized in that, In step (4), the coating thickness of the coating device is 80 μm.

5. The method for preparing an anti-slip and wear-resistant coating according to claim 2, characterized in that, The epoxy resin used in step (1) is of type E20.

6. The method for preparing an anti-slip and wear-resistant coating according to claim 2, characterized in that, In step (4), the particle size of the ceramsite sand is 250-380μm; the defoamer is DC-65; the leveling agent is BYK307; the curing agent is BANCO-905; and the diluent is acetone.

7. An anti-slip and wear-resistant coating prepared by a method according to any one of claims 1 to 6.

8. The application of an anti-slip and wear-resistant coating prepared by the method of any one of claims 1 to 6 in a basketball court.

Images