A conductive and ultra-wear-resistant polyurethane floor coating and its preparation method

Abstract

This invention discloses a conductive, ultra-wear-resistant polyurethane floor coating and its preparation method, comprising separately packaged components A, B, and C, formulated in a weight ratio. Component A: HDI trimer. Component B: Preparation of the grinding pigment paste: mixing aldehyde-ketone resin liquid, leveling agent, wetting and dispersing agent, single-walled carbon nanotubes, defoamer, propylene glycol methyl ether acetate, and pigment; paint mixing: mixing fumed silica, wax powder, reaction accelerator, leveling agent, substrate wetting agent, and propylene glycol methyl ether acetate to obtain component B. Component C: spherical stainless steel beads. This invention, when used in conjunction with epoxy self-leveling flooring, exhibits excellent wear resistance and long-lasting conductivity, increasing the wear resistance of epoxy self-leveling flooring by 20 times, while also taking into account the environmental friendliness, easy cleaning, and corrosion resistance of the floor coating, extending the service life of the coated conductive substrate.

Description

Technical Field

[0001] This invention belongs to the field of floor coatings and relates to a conductive, ultra-wear-resistant polyurethane floor coating suitable for applications requiring high conductivity and wear resistance, as well as its preparation method. Background Technology

[0002] Currently, there are two main types of conductive and ultra-wear-resistant floor coatings: epoxy ultra-wear-resistant conductive floor coatings and... polyurethane Epoxy ultra-wear-resistant conductive floor coatings possess advantages such as high hardness, high compressive strength, and excellent chemical resistance. However, they are brittle, prone to cracking, and have poor wear resistance, weather resistance, and short-lasting conductivity. Moisture-curing polyurethane floor coatings can overcome these mechanical property defects. Their curing principle involves the reaction of isocyanate with moisture in the air, resulting in cross-linking and the formation of a coating with numerous urea and urethane bonds. Therefore, antistatic and wear-resistant polyurethane floor coatings show significant improvements in multiple technical indicators such as film hardness, wear resistance, and scratch resistance. However, due to limitations in the application of conductive materials and wear-resistant aggregates, they still suffer from insufficient wear resistance and short-lasting conductivity.

[0003] Both types of ultra-wear-resistant flooring materials almost universally use white fused alumina as the wear-resistant aggregate and single-walled carbon nanotubes as the conductive material. Although white fused alumina has a Mohs hardness of 9, it can still be worn down in harsh environments. As the only conductive material in the system, single-walled carbon nanotubes will experience a decrease in resistance or even become non-conductive after prolonged floor wear, significantly reducing their conductivity. This leads to the need for repeated floor renovations, which can ultimately disrupt industrial production. Failure to renovate in a timely manner can even endanger personnel's lives, as seen in the floors of some military factories, large electronics factories, and powder production plants.

[0004] Therefore, it is necessary to design a conductive, ultra-wear-resistant polyurethane floor coating that can solve the above problems. Summary of the Invention

[0005] To address the aforementioned deficiencies in the existing technology, the present invention aims to provide a conductive, ultra-wear-resistant polyurethane floor coating and its preparation method. By combining spherical inorganic metal materials with organic polymer materials, a floor coating with excellent wear resistance and long-lasting conductivity is prepared. This coating can significantly improve the service life of the conductive, ultra-wear-resistant polyurethane floor, while also taking into account the environmental protection, easy cleaning, and corrosion resistance characteristics of the floor coating.

[0006] The present invention is achieved through the following technical solution.

[0007] According to one aspect of the present invention, a method for preparing a conductive, ultra-wear-resistant polyurethane floor coating is provided, comprising the following steps:

[0008] Preparation of component A:

[0009] Filter the HDI trimer and dispense it to obtain component A;

[0010] Preparation of component B:

[0011] a) Preparation of the grinding paste: 40-60 parts of aldehyde-ketone resin solution are metered into a tank, and 0.4-0.8 parts of wetting agent, 0.8-1.2 parts of dispersant, 0.2-0.3 parts of single-walled carbon nanotubes, 1.0-1.5 parts of defoamer, 5-15 parts of propylene glycol methyl ether acetate, and 20-30 parts of pigment are added sequentially while stirring and dispersing. The fineness is controlled to reach 30µm to obtain the grinding paste.

[0012] b) Paint mixing: Grind the color paste into a container, and add 1-2 parts of fumed silica, 1-6 parts of wax powder, 2-4 parts of reaction accelerator, 1-2 parts of leveling agent, 1-2 parts of substrate wetting agent, and 5-10 parts of propylene glycol methyl ether acetate in sequence while stirring. Stir, control the viscosity, filter, and you will get component B.

[0013] Preparation of component C:

[0014] By dispensing spherical stainless steel beads with a diameter of 0.25 mm according to the weight ratio, component C is obtained;

[0015] Mixture of components A, B, and C:

[0016] The components A:B:C are mixed in a weight ratio of 5:2:4. After thorough mixing, the mixture is applied by scraping first and then rolling.

[0017] Preferably, the HDI trimer has a solid content greater than 90% and a viscosity less than 2000 mPa·s.

[0018] Preferably, the aldehyde-ketone resin has a molecular weight of less than 1000 and a hydroxyl value of less than 60 mg KOH / g.

[0019] Preferably, the aldehyde-ketone resin solution is prepared by mixing and dispersing 50-70 parts by weight of aldehyde-ketone resin with 20-30 parts by weight of propylene glycol methyl ether acetate and 10-20 parts by weight of S-150 aromatic solvent oil at 1200-1500 r / min until a transparent liquid is formed, and the fineness is measured to be below 20 μm.

[0020] Preferably, the reaction promoter is prepared by mixing 70-80 parts by weight of propylene glycol methyl ether acetate with 20-30 parts by weight of organotin drying agent at 500-800 r / min.

[0021] The organotin drying agent is either DABCO T-12 or Deqian Catacure TIN-22.

[0022] Preferably, the leveling agent is BYK333, DIGIC 1484, or Efka 3777.

[0023] Preferably, the dispersant is BYK110, BYK161, or BYK-P104S.

[0024] Preferably, the defoamer is Hemings Deqian 6500, Deqian 6800 or Digo Airex 900.

[0025] Preferably, the substrate wetting agent is BYK346, DIGIC 245, or DIGIC 280.

[0026] Preferably, the pigment is rutile titanium dioxide, carbon black, or CJ-15SG lemon yellow.

[0027] Preferably, the grinding paste is prepared by dispersing it for 10-15 minutes under stirring at 2000-3000 r / min; and the grinding fineness is controlled to reach 30µm at a temperature below 60℃.

[0028] Preferably, the paint is prepared by adding the raw materials at a speed of 1500~3000r / min and stirring for 10~15min, controlling the viscosity at 25±5sFord-4 cup.

[0029] According to another aspect of the present invention, a conductive, ultra-wear-resistant polyurethane floor coating prepared by the method described above is provided.

[0030] The present invention, by adopting the above technical solution, has the following beneficial effects:

[0031] This invention utilizes a combination of wear-resistant spherical stainless steel beads and single-walled carbon nanotubes to prepare an antistatic, ultra-wear-resistant polyurethane floor coating. Compared to traditional antistatic coatings, this method effectively solves the problem of unstable or reduced conductivity of conventional conductive materials after wear, maintaining a consistently stable resistance value below 1×10⁻⁶. 5 By adjusting the ratio of stainless steel beads to HDI isocyanate curing agent, the coating exhibits excellent wear resistance, increasing it by four times compared to traditional ultra-wear-resistant polyurethane coatings. Simultaneously, the HDI trimer, containing NCO groups, absorbs moisture from the air and cross-links to cure the film. In addition to the urea bonds formed during moisture curing, melamine and urethane bonds are also generated, thereby improving the chemical stability and chemical corrosion resistance of the coating. It also features high hardness, good water resistance, and good weather resistance.

[0032] The features of this invention are as follows:

[0033] 1. Durable and stable conductivity. Using spherical stainless steel beads as the main conductive material and single-walled carbon nanotubes as the auxiliary conductive material, the problem of unstable or reduced conductivity after wear of conventional conductive materials is solved.

[0034] 2. Superior wear resistance. The film is formed by HDI trimer absorbing moisture from the air and reacting to crosslink and cure. Spherical stainless steel beads are used as wear-resistant aggregate, which greatly improves the wear resistance of the coating. The wear resistance is 4 times that of polyurethane super wear-resistant coatings.

[0035] 3. Excellent weather resistance. It does not change color after 800 hours of artificial aging, making it suitable for use as a topcoat for epoxy flooring, ensuring the epoxy flooring coating system can be used outdoors.

[0036] 4. Easier to clean. The spherical stainless steel beads reduce frictional resistance in all directions on the paint film surface, making it less likely for external impurities to adhere. At the same time, the smooth surface makes it easier to clean, and after long-term use, it can be restored to its original condition with simple cleaning.

[0037] 5. Higher hardness. The hardness reaches 6H, far exceeding the 2H of epoxy flooring, greatly improving scratch resistance.

[0038] The conductive, ultra-wear-resistant polyurethane floor coating of this invention belongs to the polyurethane product category. Polyurethane floor coatings also have the following characteristics: excellent UV resistance. Therefore, they can also be applied to outdoor flooring applications. Detailed Implementation

[0039] The present invention will now be described in detail with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0040] This invention provides a method for preparing a conductive, ultra-wear-resistant polyurethane floor coating, comprising the following steps:

[0041] (1) Preparation of component A:

[0042] Filter and dispense HDI trimer (Covestro N3600 or N3390) with a solid content greater than 90% and a viscosity less than 2000 mPa·s to obtain component A.

[0043] (2) Preparation of component B:

[0044] 1) Preparation of aldehyde-ketone resin solution: 50-70 parts by weight of aldehyde-ketone resin with a molecular weight of less than 1000 and a hydroxyl value of less than 60 mg KOH / g are mixed with 20-30 parts of propylene glycol methyl ether acetate and 10-20 parts of S-150 aromatic solvent oil. The mixture is dispersed at a speed of 1200-1500 r / min until it becomes a transparent liquid. The fineness is measured to be less than 20 μm to obtain the aldehyde-ketone resin solution, which is ready for use.

[0045] 2) Preparation of reaction promoter: Mix 70-80 parts by weight of propylene glycol methyl ether acetate with 20-30 parts by weight of organotin drying agent (DABCO T-12 or Deqian Catacure TIN-22) and stir evenly at 500-800 r / min to obtain the reaction promoter for later use.

[0046] 3) Preparation of the grinding paste: Measure 40-60 parts by mass of aldehyde-ketone resin solution into a tank. While stirring at 500-800 r / min, add sequentially 0.4-0.8 parts of leveling agent (BYK333, DIGIC 1484, or Efka 3777), 0.8-1.2 parts of wetting and dispersing agent (BYK110, BYK161, or BYK-P 104S), 0.2-0.3 parts of single-walled carbon nanotubes (Jingyi New Materials' MATRIX301), and 1.0-1.5 parts of defoamer (Hemings Deqian 6500, Deqian 6800, DIGIC Airex). 900), 5-15 parts of propylene glycol methyl ether acetate, and 20-30 parts of pigment (rutile titanium dioxide, carbon black, or CJ-15SG lemon yellow) are stirred and dispersed at 2000-3000 r / min for 10-15 min; the fineness is controlled to reach 30µm at a temperature below 60℃ to obtain a ground color paste.

[0047] Among them, the pigments are organic or inorganic pigments with weather resistance greater than level 4 and lightfastness greater than level 6.

[0048] 4) Paint mixing: Grind the color paste into a container, and while stirring at 1500~3000r / min, add 1~2 parts of fumed silica, 1~6 parts of wax powder, 2~4 parts of reaction accelerator, 1~2 parts of leveling agent (BYK333, DIG1484 or Efka3777), 1~2 parts of substrate wetting agent (BYK346, DIG245 or DIG280), and 5~10 parts of propylene glycol methyl ether acetate to adjust the viscosity. Stir for 10~15min, control the viscosity at 25±5s (Ford-4 cup), filter, and package to obtain component B.

[0049] (3) Preparation of component C:

[0050] By dispensing spherical stainless steel beads with a diameter of 0.25 mm according to the weight ratio, component C is obtained.

[0051] (4) Mixing of components A, B and C:

[0052] When using, mix the components A, B, and C by weight in a ratio of 5:2:4, stir thoroughly, and then apply using a scraper followed by a roller.

[0053] The preparation method of the present invention will be further illustrated below through different embodiments.

[0054] Example 1

[0055] (1) Preparation of component A:

[0056] Filter the Covestro N3600 or N3390 trimer and dispense it to obtain component A;

[0057] (2) Preparation of component B:

[0058] 1) Preparation of aldehyde-ketone resin solution: 70 parts by weight of aldehyde-ketone resin, 20 parts by weight of propylene glycol methyl ether acetate and 10 parts by weight of S-150 aromatic solvent oil are mixed and dispersed at 1500 r / min until a transparent liquid is formed. The fineness is measured to be below 20 μm and then set aside for use.

[0059] 2) Preparation of reaction promoter: Mix 80 parts by weight of propylene glycol methyl ether acetate with 20 parts of Deqian TIN-22 and stir evenly at 800 r / min for later use;

[0060] 3) Preparation of the grinding paste: 52 parts by mass of aldehyde-ketone resin solution were metered into a tank. While stirring at 500-800 rpm, 0.8 parts of leveling agent (one or more of BYK333, DIGIC 1484, and Efka 3777), 1 part of wetting and dispersing agent (one or more of BYK110, BYK161, and BYK-P 104S), 0.2 parts of single-walled carbon nanotubes (MATRIX301 from Jingyi New Materials), 1.0 part of defoamer (one or more of Haimings Deqian 6500, Deqian 6800, and DIGIC Airex 900), 15 parts of propylene glycol methyl ether acetate, and 30 parts of pigment (rutile titanium dioxide, carbon black, or CJ-15SG lemon yellow) were added sequentially. The mixture was stirred and dispersed at 2000-3000 rpm for 10-15 minutes. The grinding process was carried out at a temperature below 60℃ to control the fineness to 30 µm, thus obtaining the grinding paste.

[0061] 4) Paint mixing: 78 parts of the ground color paste are put into a tank. While stirring at 1500r / min, 2 parts of R972 atmospheric silica, 6 parts of BYK996 wax powder, 4 parts of TIN-22 accelerator, 2 parts of leveling agent, 2 parts of substrate wetting agent, and 6 parts of propylene glycol methyl ether acetate are added in sequence to adjust the viscosity. Stir for 10-15min, control the viscosity at 25±5s Ford cup, filter, and package to obtain component B.

[0062] (3) Preparation of component C:

[0063] By dispensing spherical stainless steel beads according to the weight ratio, component C is obtained;

[0064] (4) Mixing of components A, B and C:

[0065] When using, mix component A : component B : component C in a weight ratio of 5 : 2 : 4, and stir well. Apply by scraping first, then by rolling.

[0066] The test results of the main performance indicators of the conductive ultra-wear-resistant polyurethane floor coating (gray) are shown in Table 1 below:

[0067] Table 1 Performance of Gray Conductive Ultra-Wear-Resistant Polyurethane Flooring

[0068]

[0069] Example 2

[0070] (1) Preparation of component A:

[0071] Filter and dispense Asahi Kasei TPA-100 isocyanate curing agent to obtain component A;

[0072] (2) Preparation of component B:

[0073] 1) Preparation of aldehyde-ketone resin solution: 70 parts by weight of aldehyde-ketone resin, 15 parts by weight of propylene glycol methyl ether acetate and 15 parts by weight of S-150 aromatic solvent oil are mixed and dispersed at 1200 r / min until a transparent liquid is formed. The fineness is measured to be below 20 μm and then set aside for use.

[0074] 2) Preparation of reaction promoter: 75 parts by weight of propylene glycol methyl ether acetate and 25 parts by weight of DABCO T-12 were mixed and stirred evenly at 700 r / min, and set aside for use;

[0075] 3) Preparation of the grinding paste: 54.4 parts by mass of aldehyde-ketone resin solution were metered into the tank. While stirring at 500-800 r / min, 0.6 parts of leveling agent (one or more of BYK333, DIGIC 1484, and Efka 3777), 1.2 parts of wetting and dispersing agent (one or more of BYK110, BYK161, and BYK-P 104S), 0.3 parts of single-walled carbon nanotubes (MATRIX301 from Jingyi New Materials), and 1.5 parts of defoamer (Hemings Deqian 6500, Deqian 6800, DIGIC Airex) were added sequentially. One or more of 900), 12 parts of propylene glycol methyl ether acetate, and 30 parts of pigment (rutile titanium dioxide, carbon black, or CJ-15SG lemon yellow) are stirred and dispersed at 2000~3000 r / min for 10~15 min; the fineness is controlled to reach 30µm at a temperature below 60℃ to obtain a ground color paste.

[0076] 4) Paint mixing: 78 parts of the ground color paste are put into a tank. While stirring at 1500r / min, 2 parts of R972 atmospheric silica, 5.4 parts of BYK996 wax powder, 3 parts of 20% T-12 accelerator, 2 parts of leveling agent, 2 parts of substrate wetting agent, and 10 parts of propylene glycol methyl ether acetate are added in sequence to adjust the viscosity. Stir for 10-15min, control the viscosity at 25±5s Ford cup, filter and package to obtain component B.

[0077] (3) Preparation of component C:

[0078] By dispensing spherical stainless steel beads according to the weight ratio, component C is obtained;

[0079] (4) Mixing of components A, B and C:

[0080] When using, mix component A : component B : component C in a weight ratio of 5 : 2 : 4, and stir well. Apply by scraping first, then by rolling.

[0081] The test results of the main performance indicators of the conductive ultra-wear-resistant polyurethane floor coating (green) are shown in Table 2 below:

[0082] Table 2 Performance of Green Conductive Ultra-Wear-Resistant Polyurethane Flooring

[0083]

[0084] Example 3

[0085] (1) Preparation of component A:

[0086] Filter and package Wanhua HT-600 isocyanate curing agent to obtain component A;

[0087] (2) Preparation of component B:

[0088] 1) Preparation of aldehyde-ketone resin solution: 60 parts by weight of aldehyde-ketone resin, 25 parts by weight of propylene glycol methyl ether acetate and 15 parts by weight of S-150 aromatic solvent oil are mixed and dispersed at 1300 r / min until a transparent liquid is formed. The fineness is measured to be below 30 μm and then set aside for use.

[0089] 2) Preparation of reaction promoter: Mix 70 parts by weight of propylene glycol methyl ether acetate with 30 parts by weight of Deqian CatacureTIN-22 and stir evenly at 500 r / min for later use;

[0090] 3) Preparation of the grinding paste: Measure 61.6 parts by mass of the aldehyde-ketone resin solution into a tank. While stirring at 500-800 r / min, add sequentially 0.4 parts of leveling agent (one or more of BYK333, DIG1484, and Efka 3777), 0.8 parts of wetting and dispersing agent (one or more of BYK110, BYK161, and BYK-P 104S), 0.2 parts of single-walled carbon nanotubes (MATRIX301 from Jingyi New Materials), and 1.0 part of defoamer (Hemings Deqian 6500, Deqian 6800, DIG Airex). One or more of 900), 6 parts of propylene glycol methyl ether acetate, and 30 parts of pigment (rutile titanium dioxide, carbon black, or CJ-15SG lemon yellow) are stirred and dispersed at 2000~3000 r / min for 10~15 min; the fineness is controlled to reach 30µm at a temperature below 60℃ to obtain a ground color paste.

[0091] 4) Paint mixing: 86.4 parts of the ground color paste are put into a tank. While stirring at 1500r / min, 2 parts of R972 atmospheric silica, 2 parts of BYK996 wax powder, 2 parts of 20% Deqian TIN-22 accelerator, 1 part of leveling agent, 1 part of substrate wetting agent, and 5.6 parts of propylene glycol methyl ether acetate are added in sequence to adjust the viscosity. Stir for 10-15min, control the viscosity at 25±5s Ford cup, filter and package to obtain component B.

[0092] (3) Preparation of component C:

[0093] By dispensing spherical stainless steel beads according to the weight ratio, component C is obtained;

[0094] (4) Mixing of components A, B and C:

[0095] When using, mix component A : component B : component C in a weight ratio of 5 : 2 : 4, and stir well. Apply by scraping first, then by rolling.

[0096] The test results of the main performance indicators of the conductive ultra-wear-resistant polyurethane floor coating (blue) are shown in Table 3 below:

[0097] Table 3 Performance of Blue Conductive Ultra-Wear-Resistant Polyurethane Flooring

[0098]

[0099] As can be seen from the test results of the above examples, the floor coating prepared by the method of the present invention has excellent wear resistance and long-lasting electrical conductivity, with an wear resistance of 0.0001 g and a resistivity of 3 × 10⁻⁶. 4With a solid content of not less than 93%, the coating of this invention extends the service life of conductive flooring and avoids the problem of repeated renovations of existing conductive flooring materials on the market due to poor wear resistance and resistance decay. At the same time, this invention has the characteristics of being environmentally friendly, easy to clean, and corrosion resistant. This invention has great economic and environmental value and is suitable for widespread application.

[0100] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A method for preparing a conductive, ultra-wear-resistant polyurethane floor coating, characterized in that, Includes the following steps: Preparation of component A: Filter the HDI trimer and dispense it to obtain component A; The HDI trimer has a solid content greater than 90% and a viscosity less than 2000 mPa·s; Preparation of component B: a) Preparation of the grinding paste: Measure 40-60 parts of aldehyde-ketone resin liquid into a tank, and add 0.4-0.8 parts of leveling agent, 0.8-1.2 parts of wetting and dispersing agent, 0.2-0.3 parts of single-walled carbon nanotubes, 1.0-1.5 parts of defoamer, 5-15 parts of propylene glycol methyl ether acetate, and 20-30 parts of pigment in sequence while stirring and dispersing. The grinding fineness is controlled to reach 30µm to obtain the ground color paste; b) Paint mixing: Grind the color paste into a container, and add 1-2 parts of fumed silica, 1-6 parts of wax powder, 2-4 parts of reaction accelerator, 1-2 parts of leveling agent, 1-2 parts of substrate wetting agent, and 5-10 parts of propylene glycol methyl ether acetate in sequence while stirring. Stir, control the viscosity, filter, and you will get component B. Preparation of component C: By dispensing spherical stainless steel beads according to the weight ratio, component C is obtained; The spherical stainless steel beads are 0.25mm diameter stainless steel beads from Shenzhen Jiuhe. Mixture of components A, B, and C: The components A:B:C are mixed in a weight ratio of 5:2:

4. After thorough mixing, the mixture is applied by scraping first and then rolling.

2. The preparation method of the conductive ultra-wear-resistant polyurethane floor coating according to claim 1, characterized in that, Preparation of the aldehyde-ketone resin solution: 50-70 parts by weight of aldehyde-ketone resin are mixed with 20-30 parts by weight of propylene glycol methyl ether acetate and 10-20 parts by weight of S-150 aromatic solvent oil, and dispersed at a speed of 1200-1500 r / min until a transparent liquid is formed, and the fineness is measured to be below 20 μm.

3. The preparation method of the conductive ultra-wear-resistant polyurethane floor coating according to claim 2, characterized in that, The aldehyde-ketone resin has a molecular weight of less than 1000 and a hydroxyl value of less than 60 mg KOH / g.

4. The preparation method of the conductive ultra-wear-resistant polyurethane floor coating according to claim 1, characterized in that, Preparation of the reaction promoter: 70-80 parts by weight of propylene glycol methyl ether acetate and 20-30 parts by weight of organotin drying agent are stirred and mixed at 500-800 r / min; The organotin drying agent includes DABCO T-12 or Deqian Catacure TIN-22.

5. The method for preparing the conductive ultra-wear-resistant polyurethane floor coating according to claim 1, characterized in that, The leveling agent is BYK333, DIG 1484 or Efka 3777; The wetting and dispersing agent is BYK110, BYK161, or BYK-P104S; The defoamer is Hemings Deqian 6500, Deqian 6800 or Digo Airex 900; The substrate wetting agent is BYK346, DIG 245 or DIG 280; The pigment is rutile titanium dioxide, carbon black, or CJ-15SG lemon yellow.

6. The method for preparing the conductive ultra-wear-resistant polyurethane floor coating according to claim 1, characterized in that, The grinding paste is prepared by dispersing it for 10-15 minutes under stirring at 2000-3000 r / min; the grinding fineness is controlled to reach 30µm at a temperature below 60℃.

7. The method for preparing the conductive ultra-wear-resistant polyurethane floor coating according to claim 1, characterized in that, The paint is prepared by adding the raw materials at a speed of 1500~3000r / min and stirring for 10~15min, controlling the viscosity at 25±5s Fort-4 cup.

8. A conductive, ultra-wear-resistant polyurethane floor coating prepared by the method described in any one of claims 1-7.

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