A kind of waterborne polyurethane anti-skid floor coating and preparation method thereof

Abstract

The present invention relates to the technical field of coating compositions, and specifically discloses a water-based polyurethane anti-skid floor coating and a preparation method thereof. The floor coating comprises component A, component B and component C; component A comprises the following raw materials in parts by weight: 10 to 55 parts of water-based polyurethane dispersion, 2 to 8 parts of pigment, 0.5 to 2 parts of trihydroxypropane, and 25 to 40 parts of water; component B comprises the following raw materials in parts by weight: 10 to 25 parts of water-based isocyanate curing agent, 4 to 10 parts of film-forming aid; component C comprises the following raw materials in parts by weight: 2 to 8 parts of modified SiC, 0.5 to 1.5 parts of dispersant, 0.1 to 1 part of defoamer, 0.1 to 1 part of wetting agent, and 0.1 to 1 part of leveling agent. The coating prepared by the present invention is wear-resistant and anti-skid, has good durability, and is highly environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of coating compositions, and in particular to a waterborne polyurethane anti-slip floor coating and a preparation method thereof. Background Art

[0002] In the cold or wet, open-air environment of winter, people need to carry out construction on buildings, roads and activity places, such as working on outdoor vehicles or work sites. Operators often work on the roof, the upper part of equipment, the ground or the platform. Due to low temperature, ice and other phenomena, anti-skid becomes one of the prominent and important safety issues. Among the various methods of anti-skid treatment, anti-skid coating is a more convenient and effective method. It can be used on a variety of surface conditions and can also give different colors to the surface of objects to beautify and decorate. Anti-skid coating is a functional material. Its function is to improve the friction of the surface of an object, form an anti-skid surface with a high friction coefficient, increase the friction of the surface of an object, so as to reduce the sliding of people, vehicles and other objects on the surface of the object, reduce the occurrence of slip and fall accidents, and avoid property losses.

[0003] Most of the classifications of anti-slip coatings are classified by the type of resin, including epoxy anti-slip coatings, polyurethane anti-slip coatings, alkyd anti-slip coatings, chlorinated rubber anti-slip coatings, etc. According to the composition of the coating, it can be divided into single-component, two-component and multi-component anti-slip coatings. Single-component anti-slip coatings have only one component, which packages the film-forming resin and anti-slip material in one component. It is more convenient to apply, but the performance is not as good as that of two-component coatings. Two-component anti-slip coatings are the most commonly used. The resin and curing agent are packaged separately, and the anti-slip material can be placed in one component. During construction, the two components are mixed together and then applied. This type of coating currently includes epoxy polyamide anti-slip coatings, polyurethane anti-slip coatings, etc. At present, most of them use two-component epoxy systems. The curing agent is often an amine that can chemically react with epoxy. This thermosetting system is very hard and wear-resistant after the reaction, and can be used on steel and concrete. Multi-component anti-slip coatings are made by packaging film-forming resins, curing agents, anti-slip particles separately. They are mixed mechanically when used, or the anti-slip particles are sprayed immediately after the coating is applied so that the anti-slip particles are firmly embedded in the coating film.

[0004] Polyurethane has good anti-skid properties, and the static friction coefficient of its coating in dry, water-wet and oil-wet states is greater than 0.45. Therefore, it can be used in places with high anti-skid performance requirements, such as offshore oil platforms, high-voltage transmission line towers, microwave towers, aircraft carrier decks, as well as parking lots, workshops, hospitals, sidewalks, overpasses, stadiums and swimming pools. The floors of buildings can achieve good anti-skid effects. Anti-skid granules are an important component of anti-skid coatings. Anti-skid granules can be divided into two categories according to their materials: synthetic organic materials such as inert polymer materials such as polyvinyl chloride, polyethylene, polypropylene resin particles, polyurethane resin particles, rubber particles, etc.; inorganic materials such as silica powder, quartz sand, glass flakes, silicon carbide, crystalline alumina, mica, etc.

[0005] Chinese patent 202010587275.5 discloses an antistatic wear-resistant polyurethane floor coating and a preparation method thereof. The antistatic wear-resistant polyurethane floor coating of the invention is composed of component A, component B and component C in a mass ratio of (2-3): (2-3): (4-5), component A is composed of polymer polyols, carbon nanotubes, dispersants, defoamers, leveling agents, wetting agents, chain extenders, catalysts and color pastes, component B is composed of plant polyols, terminal hydroxyl polysiloxanes and aliphatic isocyanates, and component C is a wear-resistant aggregate. The construction thickness of the polyurethane floor coating of the invention is small, and the formed floor has permanent antistatic properties, super wear resistance, scratch resistance, anti-slip, chemical corrosion resistance and other properties, and can be used in industrial plants with high loads and high traffic flow.

[0006] Chinese patent 201811525843.8 discloses a polyurethane texture anti-skid floor coating, which includes component A and component B; component A includes the following raw materials in parts by weight: 15-25 parts of 1,6-diisocyanate, 15-25 parts of methyl 2,6-diisocyanate hexanoate; 30-45 parts of butanediol, 10-20 parts of ethyl butyl acetate, 8-10 parts of organic bentonite, 8-10 parts of kaolin, 1-5 parts of color paste, 0.1-0.5 parts of EFKA-2040, 0.1-0.5 parts of EFKA-3650, 0.1-0.5 parts of EFKA-4310 0.1-0.5 parts; the B component includes the following raw materials by weight: 30-40 parts of hydroxyl-containing fluororesin, 0.5-1 parts of zinc cyclohexaneate, and 0.5-1 parts of lead cyclohexaneate; the weight ratio of the A component to the B component is 4:1. The polyurethane texture anti-skid floor coating prepared by the invention is a new type of floor coating, which is green and environmentally friendly, has excellent weather resistance, good wear resistance, strong anti-skid property, and good chemical resistance.

[0007] Anti-skid granules are indispensable in anti-skid coatings. Inorganic fillers such as SiC and Al2O3 have high hardness, good wear resistance and high temperature resistance, and are therefore widely used in the prior art. However, inorganic fillers have poor compatibility with organic resins, and SiC has poor dispersion stability in water-based coatings. This causes it to easily settle in the coating, thereby affecting the uniformity of the coating and the adhesion of the paint film. Excessive settling results in insufficient convexity on the paint film surface, which reduces the anti-skid performance. Summary of the invention

[0008] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is a water-based polyurethane anti-slip floor coating and a preparation method thereof.

[0009] SiC has excellent properties such as high hardness, high strength, high modulus, high temperature resistance, and corrosion resistance. As one of the high-performance reinforcing fillers of advanced composite materials, it has been widely used. However, it is an inorganic material and has poor compatibility with the coating matrix resin. It cannot really play the role of anti-slip and toughening, and even leads to the deterioration of coating performance. In addition, due to its small particle size and high surface energy, although there are a large number of hydroxyl groups on the surface, it is very easy to form hydrogen bonds and thus agglomerate, further reducing its dispersibility in the coating. Therefore, modification of SiC is very necessary. In the present invention, the inventors first graft SiC and azobisisobutyronitrile by free radical initiation, introduce hydrophilic groups on the surface, and then introduce hydrophobic long chains by reaction with NaH and 1-bromohexadecane, thereby obtaining amphiphilic SiC. When dispersed in an aqueous solution, the hydrophilic side of the SiC can well adsorb water molecules, while the long alkyl chains form steric hindrance with each other, which greatly reduces the agglomeration of SiC, thereby improving its dispersibility in aqueous solution. Adding the SiC to an anti-slip floor coating can well improve the anti-slip and wear resistance of the coating, and the prepared coating has good durability and high environmental friendliness.

[0010] To achieve the above-mentioned purpose, the present invention provides a water-based polyurethane anti-slip floor coating, comprising component A, component B and component C; component A comprises the following raw materials in parts by weight: 10 to 55 parts of water-based polyurethane dispersion, 2 to 8 parts of pigment, 0.5 to 2 parts of trihydroxypropane, and 25 to 40 parts of water; component B comprises the following raw materials in parts by weight: 10 to 25 parts of water-based isocyanate curing agent, 4 to 10 parts of film-forming aid; component C comprises the following raw materials in parts by weight: 2 to 8 parts of modified SiC, 0.5 to 1.5 parts of dispersant, 0.1 to 1 part of defoamer, 0.1 to 1 part of wetting agent, and 0.1 to 1 part of leveling agent.

[0011] Furthermore, the pigment is one of carbon black, titanium dioxide, red iron oxide, yellow iron oxide, phthalocyanine green and phthalocyanine blue.

[0012] Furthermore, the film-forming aid is a mixture of one or more of dipropylene glycol butyl ether, propylene glycol methyl ether and dodecyl alcohol ester.

[0013] Furthermore, the dispersant is a mixture of one or more of Disponer W-18, Disponer W-19, and Disponer W-77.

[0014] Furthermore, the defoamer is a NXZ type defoamer.

[0015] Furthermore, the wetting agent is a mixture of one or more of Tego245, Tego277, and Tego4100.

[0016] Furthermore, the leveling agent is a mixture of one or more of BYK-3720, BYK-333, and BYK-6410.

[0017] The preparation method of the modified SiC comprises the following steps:

[0018] X1 weighs 5-15 parts by weight of SiC and disperses it in 15-50 parts by weight of toluene, stirs and disperses it evenly to obtain solution A; weighs 10-25 parts by weight of azobisisobutyronitrile and adds it to 15-50 parts by weight of toluene, stirs and disperses it evenly to obtain solution B; adds solution B to solution A under a nitrogen atmosphere, and continues to heat to 60-90°C under a nitrogen atmosphere after the addition is completed, stirs for 2-8 hours, and after the reaction is completed, cools to room temperature, filters, washes the residue with toluene, dries to constant weight, and adds it to 60-80 times the volume of a mixed solution (water: concentrated sulfuric acid: acetic acid = 1:1:1), heats to 100-130°C and stirs for 16-28 hours, and after the reaction is completed, cools to room temperature, dilutes with water, filters, and washes the filter cake with water and then dries it to obtain grafted SiC;

[0019] X2 weighs 1.0-2.5 parts by weight of NaH, rinses it with n-hexane, and adds it to 45-100 parts by weight of 1,4-dioxane to obtain a mixed solution. Weigh 4-10 parts by weight of the grafted SiC in step X1, add it to the mixed solution, stir and mix evenly, then add 0.8-1.5 parts by weight of 1-bromohexadecane, heat to 90-120°C and stir for 20-30 hours. After the reaction is completed, cool to room temperature, add ice water to quench, filter, and dry the residue to obtain modified SiC.

[0020] A method for preparing a waterborne polyurethane anti-slip floor coating comprises the following steps:

[0021] Weigh the raw materials in component A according to the formula, stir evenly at 1000-2000 rpm, then add the raw materials in component B, mix evenly at 500-1000 rpm, finally add component C, stir and mix evenly at 300-850 rpm, and finally filter through 120-mesh filter cloth to obtain the anti-slip floor coating.

[0022] Beneficial effects of the present invention:

[0023] 1. The present invention introduces hydrophilic groups and hydrophobic long chains on the surface of SiC by grafting and modifying SiC, thereby obtaining amphiphilic SiC. When SiC is dispersed in an aqueous solution, the hydrophilic group side can well adsorb water molecules, while the long alkyl chains form steric hindrance with each other, which well reduces the aggregation of SiC, thereby improving its dispersibility in an aqueous solution, and the obtained water-based coating is more uniform;

[0024] 2. Adding modified SiC to anti-slip floor coatings can greatly improve the anti-slip and wear resistance of the coatings. The prepared coatings have good durability and high environmental friendliness. DETAILED DESCRIPTION

[0025] Waterborne polyurethane dispersion, model: Leasys 3900A, Shizhong Mingzhi Chemical Co., Ltd.

[0026] Water-based isocyanate curing agent, model: Imprafix 2794XP, Zhenlishi’s powerful supplier.

[0027] SiC, particle size: 50nm.

[0028] NaH, 60 wt% sealed in oil.

[0029] Concentrated sulfuric acid, 98wt%.

[0030] Comparative Example 1

[0031] A method for preparing a waterborne polyurethane anti-slip floor coating comprises the following steps:

[0032] Weigh 4.5 kg of waterborne polyurethane dispersion Leasys 3900A, 0.5 kg of titanium dioxide, 0.1 kg of trihydroxypropane, and 4 kg of water, stir and mix evenly at 1500 rpm, then add 1.5 kg of waterborne isocyanate curing agent Imprafix 2794XP and 0.4 kg of dipropylene glycol butyl ether, stir and mix evenly at 850 rpm, finally add 0.5 kg of SiC, 0.1 kg of Disponer W-18, 0.05 kg of NZX defoamer, 0.1 kg of Tego245, and 0.1 kg of BYK-333, mix evenly at 450 rpm, and finally filter through a 120-mesh filter cloth to obtain the floor coating.

[0033] Example 1

[0034] A method for preparing a waterborne polyurethane anti-slip floor coating comprises the following steps:

[0035] Weigh 4.5 kg of waterborne polyurethane dispersion Leasys 3900A, 0.5 kg of titanium dioxide, 0.1 kg of trihydroxypropane, and 4 kg of water, stir and mix evenly at 1500 rpm, then add 1.5 kg of waterborne isocyanate curing agent Imprafix 2794XP and 0.4 kg of dipropylene glycol butyl ether, stir and mix evenly at 850 rpm, finally add 0.5 kg of modified SiC, 0.1 kg of Disponer W-18, 0.05 kg of NZX defoamer, 0.1 kg of Tego245, and 0.1 kg of BYK-333, mix evenly at 450 rpm, and finally filter through a 120-mesh filter cloth to obtain the floor coating.

[0036] The preparation method of the modified SiC comprises the following steps:

[0037] X1 weighed 1 kg of SiC and dispersed it in 4 L of toluene, stirred and dispersed it evenly to obtain solution A; weighed 2 kg of azobisisobutyronitrile and added it to 3 L of toluene to obtain solution B; solution B was added to solution A under a nitrogen atmosphere, and after the addition was completed, it was continued to be heated to 80°C under a nitrogen atmosphere and stirred for 6 hours. After the reaction was completed, it was cooled to room temperature and filtered. The residue was washed with toluene and dried to constant weight and added to 60 volumes of a mixed solution (water: concentrated sulfuric acid: acetic acid volume ratio = 1:1:1), heated to 110°C and stirred for 22 hours. After the reaction was completed, it was cooled to room temperature and diluted with water, filtered, and the filter cake was washed with water and dried at 80°C for 6 hours to obtain grafted SiC;

[0038] X2 weighed 150g of NaH, rinsed with n-hexane, and added to 6L of 1,4-dioxane to obtain a mixed solution. Weighed 0.8kg of the grafted SiC in step X1 and added it to the mixed solution. After stirring and mixing evenly, 0.1kg of 1-bromohexadecane was added. The mixture was heated to 105°C and stirred for 24h. After the reaction was completed, the mixture was cooled to room temperature, quenched with ice water, and filtered. The residue was dried at 80°C for 8h to obtain modified SiC.

[0039] Example 2

[0040] A method for preparing a waterborne polyurethane anti-slip floor coating comprises the following steps:

[0041] Weigh 4.5 kg of waterborne polyurethane dispersion Leasys 3900A, 0.5 kg of titanium dioxide, 0.1 kg of trihydroxypropane, and 4 kg of water, stir and mix evenly at 1500 rpm, then add 1.5 kg of waterborne isocyanate curing agent Imprafix 2794XP and 0.4 kg of dipropylene glycol butyl ether, stir and mix evenly at 850 rpm, finally add 0.5 kg of modified SiC, 0.1 kg of Disponer W-18, 0.01 kg of NZX defoamer, 0.1 kg of Tego245, and 0.1 kg of BYK-333, mix evenly at 450 rpm, and finally filter through 120-mesh filter cloth to obtain the floor coating.

[0042] The preparation method of the modified SiC comprises the following steps:

[0043] X1 weighed 1 kg of SiC and dispersed it in 4 L of toluene, stirred and dispersed it evenly to obtain solution A; weighed 2 kg of azobisisobutyronitrile and added it to 3 L of toluene to obtain solution B; solution B was added to solution A under a nitrogen atmosphere, and after the addition was completed, it was continued to be heated to 80°C under a nitrogen atmosphere and stirred for 6 hours. After the reaction was completed, it was cooled to room temperature and filtered. The residue was washed with toluene and dried to constant weight and added to 60 volumes of a mixed solution (water: concentrated sulfuric acid: acetic acid volume ratio = 1:1:1), heated to 110°C and stirred for 22 hours. After the reaction was completed, it was cooled to room temperature and diluted with water, filtered, and the filter cake was washed with water and dried at 80°C for 6 hours to obtain grafted SiC;

[0044] X2 weighed 150g of NaH, rinsed with n-hexane, and added to 6L of 1,4-dioxane to obtain a mixed solution. Weighed 0.8kg of the grafted SiC in step X1 and added it to the mixed solution. After stirring and mixing evenly, 0.1kg of 1-bromohexadecane was added. The mixture was heated to 105°C and stirred for 24h. After the reaction was completed, the mixture was cooled to room temperature, quenched with ice water, and filtered. The residue was dried at 80°C for 8h to obtain modified SiC.

[0045] Example 3

[0046] A method for preparing a waterborne polyurethane anti-slip floor coating comprises the following steps:

[0047] Weigh 4.5 kg of waterborne polyurethane dispersion Leasys 3900A, 0.8 kg of titanium dioxide, 0.1 kg of trihydroxypropane, and 4 kg of water, stir and mix evenly at 1500 rpm, then add 1.5 kg of waterborne isocyanate curing agent Imprafix 2794XP and 0.4 kg of dipropylene glycol butyl ether, stir and mix evenly at 850 rpm, finally add 0.5 kg of modified SiC, 0.1 kg of Disponer W-18, 0.05 kg of NZX defoamer, 0.1 kg of Tego245, and 0.1 kg of BYK-333, mix evenly at 450 rpm, and finally filter through 120-mesh filter cloth to obtain the floor coating.

[0048] The preparation method of the modified SiC comprises the following steps:

[0049] X1 weighed 1 kg of SiC and dispersed it in 4 L of toluene, stirred and dispersed it evenly to obtain solution A; weighed 2 kg of azobisisobutyronitrile and added it to 3 L of toluene to obtain solution B; solution B was added to solution A under a nitrogen atmosphere, and after the addition was completed, it was continued to be heated to 80°C under a nitrogen atmosphere and stirred for 6 hours. After the reaction was completed, it was cooled to room temperature and filtered. The residue was washed with toluene and dried to constant weight and added to 60 volumes of a mixed solution (water: concentrated sulfuric acid: acetic acid volume ratio = 1:1:1), heated to 110°C and stirred for 22 hours. After the reaction was completed, it was cooled to room temperature and diluted with water, filtered, and the filter cake was washed with water and dried at 80°C for 6 hours to obtain grafted SiC;

[0050] X2 weighed 150g of NaH, rinsed with n-hexane, and added to 6L of 1,4-dioxane to obtain a mixed solution. Weighed 0.8kg of the grafted SiC in step X1 and added it to the mixed solution. After stirring and mixing evenly, 0.1kg of 1-bromohexadecane was added. The mixture was heated to 105°C and stirred for 24h. After the reaction was completed, the mixture was cooled to room temperature, quenched with ice water, and filtered. The residue was dried at 80°C for 8h to obtain modified SiC.

[0051] Example 4

[0052] A method for preparing a waterborne polyurethane anti-slip floor coating comprises the following steps:

[0053] Weigh 4.5 kg of waterborne polyurethane dispersion Leasys 3900A, 0.5 kg of titanium dioxide, 0.1 kg of trihydroxypropane, and 4 kg of water, stir and mix evenly at 1500 rpm, then add 1.5 kg of waterborne isocyanate curing agent Imprafix 2794XP and 0.4 kg of dipropylene glycol butyl ether, stir and mix evenly at 850 rpm, finally add 0.5 kg of modified SiC, 0.1 kg of Disponer W-18, 0.05 kg of NZX defoamer, 0.1 kg of Tego245, and 0.05 kg of BYK-333, mix evenly at 450 rpm, and finally filter through 120-mesh filter cloth to obtain the floor coating.

[0054] The preparation method of the modified SiC comprises the following steps:

[0055] X1 weighed 1 kg of SiC and dispersed it in 4 L of toluene, stirred and dispersed it evenly to obtain solution A; weighed 2 kg of azobisisobutyronitrile and added it to 3 L of toluene to obtain solution B; solution B was added to solution A under a nitrogen atmosphere, and after the addition was completed, it was continued to be heated to 80°C under a nitrogen atmosphere and stirred for 6 hours. After the reaction was completed, it was cooled to room temperature and filtered. The residue was washed with toluene and dried to constant weight and added to 60 volumes of a mixed solution (water: concentrated sulfuric acid: acetic acid volume ratio = 1:1:1), heated to 110°C and stirred for 22 hours. After the reaction was completed, it was cooled to room temperature and diluted with water, filtered, and the filter cake was washed with water and dried at 80°C for 6 hours to obtain grafted SiC;

[0056] X2 weighed 150g of NaH, rinsed with n-hexane, and added to 6L of 1,4-dioxane to obtain a mixed solution. Weighed 0.8kg of the grafted SiC in step X1 and added it to the mixed solution. After stirring and mixing evenly, 0.1kg of 1-bromohexadecane was added. The mixture was heated to 105°C and stirred for 24h. After the reaction was completed, the mixture was cooled to room temperature, quenched with ice water, and filtered. The residue was dried at 80°C for 8h to obtain modified SiC.

[0057] Test Example 1

[0058] The floor coatings prepared in the control example and the embodiment were tested for a series of properties such as anti-slip, wear resistance, waterproofness, and chemical resistance. The test method was carried out in accordance with GB / T 22374-2018 Floor Coating Materials. The specific test results are shown in Table 1.

[0059] Table 1 Test results of anti-slip floor coatings

[0060]

[0061] From the test results of the anti-slip floor coatings of Example 1 and Control Example 1, it can be seen that the addition of modified SiC improves the anti-slip and wear resistance of the coating to a certain extent. This may be because although the high hardness of SiC itself will bring certain wear-resistant and anti-slip effects to the coating, due to the nature of SiC itself, it cannot be well dispersed in aqueous solutions and is very easy to agglomerate, which also causes SiC to easily settle in the coating. Therefore, the surface flatness of Control Example 1 is far inferior to that of Example 1. The improvement of anti-slip and wear resistance in Example 1 may be because SiC is grafted and modified, and hydrophilic groups and hydrophobic long chains are introduced on its surface at the same time, thereby obtaining amphiphilic SiC. When it is dispersed in an aqueous solution, the hydrophilic side of the group can well adsorb water molecules, while the long alkyl chains form steric hindrances with each other, which well reduces the agglomeration between SiC, thereby improving its dispersibility in aqueous solution, and the resulting water-based coating is more uniform, so the performance of the coating is also greatly improved. The difference in performance between Example 1 and Example 3 is due to the fact that when too much titanium dioxide is added, the dispersibility of the coating will deteriorate, resulting in increased viscosity, poor flatness of the coating surface, and affected wear resistance and anti-skid performance; the difference between Example 1 and Example 2 may be due to the fact that inappropriate use of defoaming agent will cause holes to form on the surface of the coating during coating, which will cause uneven coating surface, poor wear resistance, and weak impact resistance; the difference between Example 1 and Example 4 may be due to the fact that when the amount of leveling agent is too small, shrinkage holes will appear, thereby affecting the coating performance.

[0062] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A water-based polyurethane anti-slip floor coating, characterized in that: It comprises component A, component B and component C; wherein component A comprises the following raw materials in parts by weight: 10-55 parts of waterborne polyurethane dispersion, 2-8 parts of pigment, 0.5-2 parts of trihydroxypropane, and 25-40 parts of water; component B comprises the following raw materials in parts by weight: 10-25 parts of waterborne isocyanate curing agent, and 4-10 parts of film-forming aid; component C comprises the following raw materials in parts by weight: 2-8 parts of modified SiC, 0.5-1.5 parts of dispersant, 0.1-1 parts of defoamer, 0.1-1 parts of wetting agent, and 0.1-1 parts of leveling agent; The preparation method of the modified SiC comprises the following steps: X1 weighs 5-15 parts by weight of SiC and disperses it in 15-50 parts by weight of toluene, stirs and disperses it evenly to obtain solution A; weighs 10-25 parts by weight of azobisisobutyronitrile and adds it to 15-50 parts by weight of toluene, stirs and disperses it evenly to obtain solution B; adds solution B to solution A under a nitrogen atmosphere, and continues to heat to 60-90°C under a nitrogen atmosphere after the addition is complete, stirs for 2-8 hours, and after the reaction is completed, cools to room temperature, filters, washes the residue with toluene, dries to constant weight, and adds it to a 60-80 times volume mixed solution, in which the volume ratio of water: concentrated sulfuric acid: acetic acid is 1:1:1, heats to 100-130°C and stirs for 16-28 hours, and after the reaction is completed, cools to room temperature, dilutes with water, filters, and washes the filter cake with water and then dries it to obtain grafted SiC; X2: Weigh 1.0-2.5 parts by weight of NaH, rinse with n-hexane, and add to 45-100 parts by weight of 1,4-dioxane to obtain a mixed solution. Weigh 4-10 parts by weight of the grafted SiC in step X1, add to the mixed solution, stir and mix evenly, then add 0.8-1.5 parts by weight of 1-bromohexadecane, heat to 90-120°C and stir for 20-30 hours. After the reaction is completed, cool to room temperature, add ice water to quench, filter, and dry the residue to obtain modified SiC.

2. The coating according to claim 1, characterized in that: The pigment is one of carbon black, titanium dioxide, iron oxide red, iron oxide yellow, phthalocyanine green and phthalocyanine blue.

3. The coating according to claim 1, characterized in that: The film-forming aid is a mixture of one or more of dipropylene glycol butyl ether, propylene glycol methyl ether and dodecyl alcohol ester.

4. The coating according to claim 1, characterized in that: The dispersant is a mixture of one or more of Disponer W-18, Disponer W-19 and Disponer W-77.

5. The coating according to claim 1, characterized in that: The defoamer is a NXZ type defoamer.

6. The coating according to claim 1, characterized in that: The wetting agent is a mixture of one or more of Tego245, Tego277 and Tego4100.

7. The coating according to claim 1, characterized in that: The leveling agent is a mixture of one or more of BYK-3720, BYK-333 and BYK-6410.

8. A method for preparing the coating according to any one of claims 1 to 7, characterized in that: The steps include: Weigh the raw materials in component A according to the formula, stir evenly at 1000-2000 rpm, then add the raw materials in component B, mix evenly at 500-1000 rpm, finally add component C, stir and mix evenly at 300-850 rpm, and finally filter through 120-mesh filter cloth to obtain the anti-slip floor coating.

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