A high abrasion-resistant water-based elastic coating

Abstract

This application relates to the technical field of waterborne polyurethane elastic coatings, and more specifically, to a high-wear-resistant waterborne elastic coating. A high-wear-resistant waterborne elastic coating comprises the following raw materials in parts by weight: 50-70 parts waterborne polyurethane emulsion, 30-40 parts wear-resistant lubricating composition, 2-6 parts dispersant, 0.2-0.4 parts defoamer, 0.1-0.3 parts leveling agent, 0.8-1.2 parts rheology modifier, and 0.3-0.7 parts thickener; the wear-resistant lubricating composition is solid lubricating particles coated with polytetrafluoroethylene (PTFE), wherein the PTFE is modified with a coupling agent, and the solid lubricating particles are one or a mixture of NiPS and MoO3-MoS2 nanoribbons. The high-wear-resistant waterborne elastic coating of this application possesses both excellent wear resistance and flame retardant properties.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water-based polyurethane elastic paint, more particularly, it relates to a high wear-resistant water-based elastic paint. BACKGROUND

[0002] Water-based paint is a kind of paint with water as the base solvent. Compared with traditional solvent-based paint, water-based paint has relatively less toxic and harmful organic volatile substances, has a lighter odor during construction, and has a relatively shorter drying time.

[0003] Water-based polyurethane elastic paint is one of the more important types of water-based paint, which has good film-forming performance, strong adhesion, good wear resistance, good weather resistance and other advantages, and has a relatively low content of volatile organic compounds, which is relatively friendly to the environment, and is widely used in corrosion protection, waterproofing, decoration of buildings, industries and handicrafts.

[0004] However, although the water-based polyurethane elastic paint has relatively excellent wear resistance, in actual work and life, wear still often occurs in areas where personnel activities are frequent, therefore, there is an urgent need for a high wear-resistant water-based elastic polyurethane paint with more excellent wear resistance. SUMMARY

[0005] In order to improve the defects of insufficient wear resistance of conventional water-based polyurethane elastic paint, the present application provides a high wear-resistant water-based elastic paint.

[0006] In a first aspect, the present application provides a high wear-resistant water-based elastic paint, which adopts the following technical solution:

[0007] A high wear-resistant water-based elastic paint, comprising the following raw materials by weight: 50-70 parts of water-based polyurethane emulsion, 30-40 parts of wear-resistant lubricating composition, 2-6 parts of dispersing agent, 0.2-0.4 parts of defoaming agent, 0.1-0.3 parts of leveling agent, 0.8-1.2 parts of rheological agent and 0.3-0.7 parts of thickening agent.

[0008] The wear-resistant lubricating composition is a polytetrafluoroethylene-coated solid lubricating particle, the polytetrafluoroethylene is modified by a coupling agent, and the solid lubricating particle is a mixture of one or more of NiPS and MoO3-MoS2 nanobelt.

[0009] Preferably, the solid lubricating particle is a mixture of MoO3-MoS2 nanobelt and NiPS.

[0010] NiPS has a structure of sheet layer accumulation, which has a huge specific surface area, so in the environment of complex friction force, the sheet layer structure of NiPS is likely to be stressed off or damaged, thereby playing a similar sheet layer lubrication effect as other sheet layer materials, at the same time, the off sheet layer can also be transferred to the friction surface to form a more perfect transfer layer, thereby improving the friction and wear performance of the matrix.

[0011] The crystal structure of MoS2 is similar to that of graphite, both of which belong to hexagonal system and have a close-packed hexagonal structure of layered structure. The edge surface of Mo-S is large, and the specific surface area is large. Moreover, the layers of MoS2 are combined by weak van der Waals force, and the layers are combined by covalent bond, so the layers are easy to slip along the close-packed, and the layers are easy to peel off, and have good anisotropy and low friction coefficient.

[0012] Among them, the connection effect between the layers of NiPS is relatively good, thereby leading to the relatively insufficient lubrication performance of NiPS, and the MoO3-MoS2 nanobelt is easy to oxidize in a humid environment, thereby leading to a significant decline in the lubrication effect of the MoO3-MoS2 nanobelt, therefore, compared with using NiPS or MoO3-MoS2 nanobelt alone, the mixed use of NiPS and MoO3-MoS2 nanobelt can improve the lubrication performance of the matrix.

[0013] Polytetrafluoroethylene is a lubricating material with excellent self-lubricating performance, which has a very low friction coefficient, a very low surface energy and a high molecular chain activity, thereby reducing the friction and wear of the matrix. At the same time, polytetrafluoroethylene also has excellent hydrophobic performance, so when polytetrafluoroethylene is coated on the surface of MoO3-MoS2 nanobelt and NiPS, it can effectively improve the influence of water absorption on MoO3-MoS2 nanobelt. However, the compatibility of polytetrafluoroethylene with waterborne polyurethane emulsion is relatively poor, so the coupling agent can make the wear-resistant lubricating composition and the waterborne polyurethane emulsion more closely connected.

[0014] In addition, NiPS is mainly composed of Si, O, Ni and H, and when NiPS is heated, it can decompose to produce SiO2, H2O and Ni oxide and other flame-retardant components. Among them, SiO2 can improve the flame-retardant performance of the composite material, H2O can reduce the temperature and dilute the combustible gas, and the oxide of Ni can catalyze the formation of carbon when burning, which helps to form a more dense carbon layer. MoO3-MoS2 nanobelt contains MoS2, and when MoO3-MoS2 nanobelt is heated, MoO3-MoS2 nanobelt will produce flame-retardant gas SO2, thereby inhibiting the further spread of fire.

[0015] Therefore, the addition of the NiPS and the MoO3-MoS2 nanobelt can improve the wear resistance and the flame retardance of the water-based elastic polyurethane coating.

[0016] Preferably, the solid lubricating particle further comprises a hydrotalcite.

[0017] The compatibility between the polytetrafluoroethylene and the NiPS and the MoO3-MoS2 nanobelt is relatively poor, and the hydrotalcite has a certain grease adsorption capacity, which can adsorb and fix the polytetrafluoroethylene, so that the polytetrafluoroethylene can be stably coated on the surface of the solid lubricating particle. At the same time, the magnesium ions in the structure of the hydrotalcite can also form ionic bonds with the grease, so that the hydrotalcite also has a certain lubricating effect.

[0018] In addition, the hydrotalcite has various inorganic metal ions, such as Mg 2+ , Zn 2+ , Cu 2+ , Al 3+ , Fe 3+ , and also has OH- and H2O, so that the hydrotalcite has the same flame retardant effect and filling effect as aluminum hydroxide or magnesium hydroxide, and even the flame retardant effect is more prominent due to the diversity of ions. In addition, the metal oxides produced by the decomposition of the hydrotalcite can also absorb the toxic and harmful gases generated by the combustion of the high wear-resistant water-based elastic coating, thereby reducing the impact on human health.

[0019] Preferably, the mass ratio of the hydrotalcite, the MoO3-MoS2 nanobelt and the NiPS is (3-5):(6-8):(2-4).

[0020] When the hydrotalcite, the MoO3-MoS2 nanobelt and the NiPS adopt the above mass ratio, the high wear-resistant water-based elastic coating prepared has more excellent flame retardant performance and wear resistance.

[0021] Preferably, the wear-resistant and lubricating composition comprises the following raw materials in mass parts: 2-4 parts of a coupling agent, 18-22 parts of polytetrafluoroethylene and 8-12 parts of a solid lubricating particle.

[0022] Preferably, the preparation method of the NiPS is as follows: gas phase silicon dioxide, nickel nitrate hexahydrate and urea are mixed, then dilute nitric acid is added and stirring is continued until the nickel nitrate hexahydrate and the urea are completely dissolved, then the stirring is continued and the temperature is raised to 80-100℃, then the reaction is carried out for 7-9h, after the reaction is completed, the temperature is cooled to room temperature, centrifugation, washing and drying are carried out, and the NiPS is obtained.

[0023] Preferably, the preparation method of the MoO3-MoS2 nanoribbons is as follows: MoS2 powder is heated to 400-600℃ in an oxygen environment, then the product is ground and pulverized, then diluted and stirred in deionized water, then heated to 150-200℃ for hydrothermal reaction, and finally cooled naturally, washed and freeze-dried to obtain MoO3-MoS2 nanoribbons.

[0024] Preferably, the preparation method of the wear-resistant lubricating composition is as follows: polytetrafluoroethylene and solid lubricating particles are mixed, followed by injection molding and granulation at an injection temperature of 340-390°C, and finally the injection-molded particles are mixed and stirred with a coupling agent to obtain the wear-resistant lubricating composition.

[0025] Preferably, the preparation method of the high wear-resistant waterborne elastic coating is as follows: waterborne polyurethane emulsion, wear-resistant lubricating composition, dispersant, defoamer, leveling agent and rheology modifier are dispersed at high speed, then ground until the fineness is <25um, then thickener is added and mixed, and finally filtered to obtain the high wear-resistant waterborne elastic coating.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. The bonding effect between NiPS layers is relatively good, which leads to relatively insufficient lubrication performance of NiPS. MoO3-MoS2 nanoribbons are easily oxidized in humid environments, which leads to a significant decrease in the lubrication effect of MoO3-MoS2 nanoribbons. Therefore, compared with using NiPS or MoO3-MoS2 nanoribbons alone, the method of using NiPS and MoO3-MoS2 nanoribbons in combination can promote the better lubrication performance of the matrix.

[0028] 2. Polytetrafluoroethylene (PTFE) has an extremely low coefficient of friction, extremely low surface energy, and high molecular chain activity, thereby reducing the friction and wear of the matrix. At the same time, PTFE also has excellent hydrophobic properties. Therefore, when PTFE is coated on the surface of MoO3-MoS2 nanoribbons and NiPS, it can effectively improve the effect of water absorption on MoO3-MoS2 nanoribbons.

[0029] 3. NiPS is mainly composed of four elements: Si, O, Ni, and H. When heated, NiPS can decompose to produce flame-retardant components such as SiO2, H2O, and Ni oxides. Among them, SiO2 can improve the flame-retardant properties of the composite material, H2O can reduce the temperature and dilute the combustible gas, and Ni oxides can catalyze the formation of char during combustion, which helps to form a denser char layer. MoO3-MoS2 nanoribbons contain MoS2. When MoO3-MoS2 nanoribbons are heated, they will produce the flame-retardant gas SO2, thereby inhibiting the further spread of fire. Detailed Implementation

[0030] The present application will be further described in detail below with reference to Examples 1-10 and Comparative Examples 1-3.

[0031] raw material

[0032] Waterborne polyurethane emulsion (Wuhan Shiquanxing New Material Technology Co., Ltd.) 7140; Dispersant EFKA PU4061; Defoamer BYK-A530; Leveling agent BYK-333; Rheology modifier ATE299; Thickener PU-16; Coupling agent KH-330; Polytetrafluoroethylene (PTFE) Daikin M-18; Hydrotalcite CAS: 102-09-0; Fumed silica AEROSIL 380; Nickel nitrate hexahydrate CAS: 13478-00-7; Urea CAS: 57-13-6; Nitric acid CAS: 7697-37-2; Molybdenum disulfide CAS: 1317-33-5.

[0033] Example

[0034] Example 1

[0035] A high-wear-resistant waterborne elastic coating comprises the following raw materials by weight: 60g waterborne polyurethane emulsion, 35g wear-resistant lubricating composition, 4g dispersant, 0.3g defoamer, 0.2g leveling agent, 1.0g rheology modifier and 0.5g thickener.

[0036] The preparation method of high wear-resistant waterborne elastic coating is as follows: waterborne polyurethane emulsion, wear-resistant lubricating composition, dispersant, defoamer, leveling agent and rheology modifier are dispersed at high speed at 600 r / min, then ground until the fineness is <25 μm, then thickener is added and mixed, and finally filtered to obtain high wear-resistant waterborne elastic coating.

[0037] The wear-resistant lubricating composition comprises the following raw materials by weight: 3g coupling agent, 20g polytetrafluoroethylene, and 10g solid lubricant.

[0038] The preparation method of the wear-resistant lubricating composition is as follows: polytetrafluoroethylene and solid lubricating particles are mixed, and then injection molded into granules. The injection temperature is adjusted between 340-390℃ according to the actual situation. Finally, the injection molded particles are mixed and stirred with a coupling agent to obtain the wear-resistant lubricating composition.

[0039] The solid lubricant is MoO3-MoS2 nanoribbons;

[0040] The preparation method of MoO3-MoS2 nanoribbons is as follows: MoS2 powder is heated to 500℃ in an oxygen environment, and then the product is ground and pulverized to a particle size of 650nm. Then, deionized water is added for dilution and stirring, with a powder-to-water ratio of 1:5. Then, the mixture is heated to 200℃ for hydrothermal reaction for 72h. Finally, it is naturally cooled, washed, and freeze-dried to obtain MoO3-MoS2 nanoribbons.

[0041] Example 2

[0042] The difference from Example 1 is that the solid lubricant is NiPS;

[0043] The preparation method of NiPS is as follows: 0.38g of fumed silica, 2.03g of nickel nitrate hexahydrate and 1.26g of urea are mixed, and then 50ml of dilute nitric acid (0.02M) is added and stirred continuously until the nickel nitrate hexahydrate and urea are completely dissolved. Then, stirring is continued and the temperature is raised to 90℃. The reaction is then carried out for 8 hours. After the reaction is completed, the mixture is cooled to room temperature, centrifuged, washed with water and dried. The drying temperature is 60℃ and the drying time is 12 hours to obtain NiPS.

[0044] Example 3

[0045] The difference from Example 1 is that the solid lubricant is a mixture of MoO3-MoS2 and NiPS nanoribbons, and the mass ratio of MoO3-MoS2 nanoribbons to NiPS is 7:3.

[0046] Example 4

[0047] The difference from Example 3 is that the solid lubricant also includes hydrotalcite, and the mass ratio of hydrotalcite, MoO3-MoS2 nanoribbons and NiPS is 4:7:3.

[0048] Examples 5-6

[0049] The difference from Example 4 is that the mass ratio of each component of the solid lubricant is different, as shown in Table 1.

[0050] Table 1. Mass ratio of each component in the solid lubricant in Examples 4-6

[0051]

[0052]

[0053] Examples 7-8

[0054] The difference from Example 4 is that the amount of each component added in the wear-resistant lubricating composition is different, as shown in Table 2.

[0055] Table 2. Dosage of each component added to the wear-resistant lubricating composition of Examples 4 and 7-8 (g)

[0056] Example 4 Example 7 Example 8 Coupling agent 3 4 2 Polytetrafluoroethylene 20 18 22 Solid lubricating particles 10 12 8

[0057] Examples 9-10

[0058] The difference from Example 4 is that the amount of each component added in the high abrasion-resistant water-based elastic coating is different, as shown in Table 3.

[0059] Table 3. Addition amount of each component of the high abrasion-resistant elastic coatings in Examples 4 and 9-10 (g)

[0060] Example 4 Example 9 Example 10 Aqueous polyurethane emulsion 60 70 50 Wear resistant lubricating composition 35 30 40 Dispersant 4 2 6 Defoamer 0.3 0.4 0.2 Leveling agent 0.2 0.1 0.3 Rheological agent 1.0 1.2 0.8 Thickening agent 0.5 0.3 0.7

[0061] Comparative Example

[0062] Comparative Example 1

[0063] The difference from Example 1 is that the wear-resistant lubricating composition is no longer added.

[0064] Comparative Example 2

[0065] The difference from Example 1 is that no coupling agent is added to the wear-resistant lubricating composition.

[0066] Comparative Example 3

[0067] The difference from Example 1 is that the wear-resistant lubricating composition no longer contains coupling agents and polytetrafluoroethylene.

[0068] Performance testing

[0069] Detection methods

[0070] Sample preparation: The high wear-resistant water-based elastic coatings of Examples 1-10 and Comparative Examples 1-3 were mixed with the curing agent at a mass ratio of 10:1. The curing agent used was 7140 curing agent from Wuhan Shiquanxing New Material Technology Co., Ltd. The mixture was then sprayed onto a template and cured at room temperature until fully cured to obtain a coating sample with a thickness of 40 μm.

[0071] I. Wear Resistance Test

[0072] Three samples were taken from Examples 1-10 and Comparative Examples 1-3 respectively. The initial mass M0 of the samples was measured. Then, the samples were subjected to a 500r friction test according to GB / T1768-2006 "Determination of Abrasion Resistance of Paints and Varnishes - Rotating Rubber Grinding Wheel Method". The mass M1 of the samples after the test was recorded. Finally, the abrasion resistance was characterized by the wear amount, where wear amount = M0 - M1, and the average value of the result was taken.

[0073] II. Flame retardant performance test

[0074] Three samples were taken from Examples 1-10 and Comparative Examples 1-3 respectively, and the oxygen index of the above samples was tested according to GB / T2406.2-2009 "Determination of Combustion Behavior by Oxygen Index Method for Plastics at Room Temperature", and the average value was taken.

[0075] The test data are shown in Table 4.

[0076] Table 4. Detection data of Examples 1-10 and Comparative Examples 1-3

[0077]

[0078]

[0079] Referring to Example 1 and Comparative Example 1 and in conjunction with Table 4, it can be seen that, compared with Example 1, the wear amount of Comparative Example 1 is significantly increased, and the oxygen index of Comparative Example 1 is also significantly decreased. This indicates that the addition of MoO3-MoS2 nanoribbons can effectively improve the wear resistance and flame retardant properties of high wear-resistant waterborne elastic coatings.

[0080] The reason lies in the fact that MoS2's crystal structure is similar to graphite's, both belonging to the hexagonal crystal system and possessing a close-packed hexagonal structure with layered layers. Mo-S has many facets, resulting in a large specific surface area. Furthermore, because the layers of MoS2 are bonded by relatively weak van der Waals forces and within layers by covalent bonds, interlayer slip along the close packing is easy, and layer-to-layer separation is readily achieved, exhibiting good anisotropy and a low coefficient of friction. Simultaneously, MoO3-MoS2 nanoribbons contain MoS2, and when heated, they generate the flame-retardant gas SO2, thereby inhibiting the further spread of fire.

[0081] Referring to Example 1 and Comparative Examples 2-3 and in conjunction with Table 4, it can be seen that, compared to Example 1, the wear amount of Comparative Example 2 is significantly increased, and the wear amount of Comparative Example 3 is further increased; the oxygen index of Comparative Examples 2-3 is significantly decreased. This indicates that the addition of coupling agent can improve the wear resistance and flame retardant properties of high wear-resistant waterborne elastic coatings, while the addition of polytetrafluoroethylene significantly improves the wear resistance of high wear-resistant elastic coatings.

[0082] The reason for this lies in the fact that polytetrafluoroethylene (PTFE) is a lubricating material with excellent self-lubricating properties. It has an extremely low coefficient of friction, extremely low surface energy, and high molecular chain activity, thereby reducing friction and wear on the matrix. Meanwhile, MoO3-MoS2 nanoribbons are easily oxidized in humid environments, leading to a significant decrease in their lubricating effect. PTFE has excellent hydrophobic properties; therefore, when PTFE is coated on the surface of MoO3-MoS2 nanoribbons, it can effectively mitigate the impact of water absorption on the MoO3-MoS2 nanoribbons. Furthermore, the coupling agent promotes a tighter bond between the wear-resistant lubricating composition and the waterborne polyurethane emulsion.

[0083] Referring to Examples 1-3 and Comparative Example 1 and in conjunction with Table 4, it can be seen that, compared with Comparative Example 1, the wear amount of Examples 1-2 is significantly reduced, and the oxygen index of Examples 1-2 is also significantly increased. This indicates that MoO3-MoS2 nanoribbons and NiPS can both improve the wear resistance and flame retardant properties of high wear-resistant waterborne elastic coatings.

[0084] The reason for this is that NiPS has a layered stacked structure with a huge specific surface area. Therefore, under complex frictional forces, the NiPS layered structure is likely to detach or break under stress, thus achieving a layered lubrication effect similar to other layered materials. At the same time, the detached layers can be transferred to the friction surface to form a more complete transfer layer, thereby improving the tribological properties of the substrate.

[0085] In addition, NiPS is mainly composed of four elements: Si, O, Ni, and H. When heated, NiPS can decompose to produce flame-retardant components such as SiO2, H2O, and Ni oxides. Among them, SiO2 can improve the flame-retardant properties of the composite material, H2O can lower the temperature and dilute flammable gases, and Ni oxides can catalyze char formation during combustion, which helps to form a denser char layer.

[0086] Compared to Examples 1-2, Example 3 showed a further decrease in wear and a further increase in oxygen index. This indicates that, compared to using NiPS or MoO3-MoS2 nanoribbons alone, mixing NiPS with MoO3-MoS2 nanoribbons can further improve the wear resistance and flame retardant properties of high wear-resistant waterborne elastic coatings.

[0087] Referring to Examples 3-4 and Table 4, it can be seen that, compared with Example 3, the wear amount of Example 4 is further reduced and the oxygen index of Example 4 is further increased. This shows that the addition of hydrotalcite can further improve the wear resistance and flame retardant properties of high wear-resistant waterborne elastic coatings.

[0088] The reason for this is that polytetrafluoroethylene (PTFE) has relatively poor compatibility with NiPS and MoO3-MoS2 nanoribbons, while hydrotalcite has a certain oil adsorption capacity, which can adsorb and fix PTFE, thus enabling PTFE to stably coat the surface of solid lubricating particles. Simultaneously, the magnesium ions in the hydrotalcite structure can also form ionic bonds with oils, thereby giving hydrotalcite a certain lubricating effect.

[0089] In addition, hydrotalcite contains various inorganic metal ions, such as Mg. 2+ Zn 2+ Cu 2+ Al 3+ Fe 3+ It also contains OH- and H2O, therefore, hydrotalcite has the same flame retardant and filling effects as aluminum hydroxide or magnesium hydroxide, and its flame retardant effect is even more prominent due to the diversity of ions.

[0090] Referring to Examples 4-6 and Table 4, it can be seen that the wear amount of Examples 5-6 is relatively higher and the oxygen index is relatively lower than that of Examples 4. This indicates that when the components of the solid lubricant are in the same mass ratio as in Example 4, the high wear-resistant waterborne elastic coating prepared will have better wear resistance and flame retardant properties.

[0091] Referring to Examples 4 and 7-8 and in conjunction with Table 4, it can be seen that, compared to Example 4, the wear amount of Examples 7-8 is relatively higher, and the oxygen index of Examples 7-8 is relatively lower. This indicates that when the components of the wear-resistant lubricating composition are added in the amounts specified in Example 4, the resulting high-wear-resistant water-based elastic material will have superior wear resistance and flame retardant properties.

[0092] Referring to Examples 4 and 9-10 and in conjunction with Table 4, it can be seen that, compared to Example 4, Examples 9-10 have a relatively higher wear amount and a relatively lower oxygen index. This indicates that when the components of the high wear-resistant waterborne elastic coating are added in the amounts specified in Example 4, the resulting high wear-resistant waterborne elastic coating will have superior wear resistance and flame retardant properties.

[0093] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A high abrasion resistant waterborne elastomeric coating, characterized in that, The raw materials include the following weight parts: 50-70 parts of water-based polyurethane emulsion, 30-40 parts of wear-resistant lubricating composition, 2-6 parts of dispersing agent, 0.2-0.4 parts of defoaming agent, 0.1-0.3 parts of leveling agent, 0.8-1.2 parts of rheological agent, and 0.3-0.7 parts of thickening agent; The wear-resistant lubricating composition is a polytetrafluoroethylene-coated solid lubricating particle, the solid lubricating particle is a mixture of NiPS, MoO3-MoS2 nanobelt and hydrotalcite, and the mass ratio of the hydrotalcite, MoO3-MoS2 nanobelt and NiPS is (3-5):(6-8):(2-4); The preparation method of the MoO3-MoS2 nanobelt is as follows: MoS2 powder is heated to 400-600°C in an oxygen environment, then the product is ground and crushed, then added to deionized water for dilution and stirring, then heated to 150-200°C for hydrothermal reaction, and finally naturally cooled, washed and freeze-dried to obtain MoO3-MoS2 nanobelt; The preparation method of the wear-resistant lubricating composition is as follows: polytetrafluoroethylene and solid lubricating particles are mixed, then injection molding is performed, the injection molding temperature is between 340-390°C, and finally the injection molding particles are mixed and stirred with a coupling agent to obtain the wear-resistant lubricating composition.

2. The high-scratch-resistant waterborne elastic paint according to claim 1, characterized in that: The wear-resistant lubricating composition is composed of 2-4 parts by mass of coupling agent, 18-22 parts by mass of polytetrafluoroethylene and 8-12 parts by mass of solid lubricating particles.

3. The high-scratch-resistant waterborne elastic paint according to claim 1, characterized in that, The preparation method of the NiPS is as follows: fumed silica, nickel nitrate hexahydrate and urea are mixed, then dilute nitric acid is added and stirring is continued until the nickel nitrate hexahydrate and urea are completely dissolved, then the stirring is continued and the temperature is raised to 80-100°C, then the reaction is carried out for 7-9h, after the reaction is completed, the temperature is cooled to room temperature, centrifuged, washed with water and dried to obtain NiPS.

4. The high-scratch-resistant waterborne elastic paint according to claim 1, characterized in that, The preparation method of the high wear-resistant water-based elastic paint is as follows: the water-based polyurethane emulsion, wear-resistant lubricating composition, dispersing agent, defoaming agent, leveling agent and rheological agent are dispersed at high speed, then ground until the fineness is <25um, then the thickening agent is added and mixed, and finally the high wear-resistant water-based elastic paint is obtained by filtration.

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