A wear-resistant toughened waterborne epoxy resin coating and a preparation method thereof

Abstract

This invention belongs to the technical field of waterborne epoxy coatings and their applications, specifically relating to a wear-resistant and toughened waterborne epoxy resin coating and its preparation method. Component A consists of E-44 type epoxy resin, a wear-resistant and toughening agent, CO897 emulsifier, LJ emulsifier, and deionized water. Component B consists of talc powder, titanium dioxide, mica powder, barium sulfate powder, anti-wear agent, defoamer, leveling agent, UV absorber, waterborne epoxy curing agent, and industrial water. Components A and B are mixed in a 1:2 mass ratio to form a waterborne epoxy resin coating, which can be brushed or sprayed at room temperature and pressure. The surface drying time is 20-30 minutes, and the complete drying time is 20-24 hours. This coating exhibits excellent wear resistance, flexibility, and mechanical properties, and can be widely used in concrete sealing primers, waterproofing and seepage prevention materials, industrial floor coatings, and tunnel lighting engineering coatings. This wear-resistant and toughened waterborne epoxy resin coating does not use any organic solvents, making it green, environmentally friendly, and environmentally conscious.

Description

Technical Field

[0001] This invention belongs to the technical field of waterborne epoxy coatings and their applications, specifically relating to a wear-resistant and toughened waterborne epoxy resin coating and its preparation method. Background Technology

[0002] Epoxy resins have long been widely used in casting, coatings, and construction due to their excellent mechanical properties, corrosion resistance, chemical resistance, and good adhesion. However, after curing, epoxy resins suffer from high crosslinking density, high internal stress, brittleness, and poor toughness, which limits their applications. Therefore, toughening modification of epoxy resins is necessary.

[0003] Toughening epoxy resins primarily involves modifying the existing uniformly dispersed epoxy resin and adding toughening agents to improve the toughness of the cured epoxy resin product. Relatively mature toughening methods for epoxy resins both domestically and internationally include: introducing rubber particles, thermoplastic resins, and nanoparticles with specific functions into the epoxy matrix as a dispersed phase; designing interpenetrating / semi-interpenetrating network polymer systems by molecularly designing the epoxy resin and a second component; and designing core-shell structured polymers and block copolymers. These methods improve the toughness and impact resistance of the epoxy resin, while simplifying the process and endowing the cured product with new and unique properties.

[0004] Yang Qingyan et al. used a chemical modification method to introduce polyethylene glycol (PEG) segments into epoxy resin, preparing a self-emulsifying waterborne epoxy resin. A waterborne epoxy emulsion was prepared via phase inversion. TiO2, mica iron oxide, talc powder, and additives were added to a self-made epoxy-modified polyamine curing agent emulsion, which was then mixed with the waterborne epoxy emulsion to prepare a waterborne epoxy anti-corrosion coating. (Journal of Guangdong University of Petrochemical Technology, 2021, Vol. 31, No. 3)

[0005] Publication No. CN103740234B discloses a high-strength, high-toughness epoxy waterborne coating and its preparation method. The waterborne coating contains water, curable epoxy material, and 0.01-5 wt% large-sheet graphene oxide. The preparation method includes: uniformly dispersing large-sheet graphene oxide in an aqueous system containing epoxy material to form the epoxy waterborne coating. Summary of the Invention

[0006] This invention addresses the traditional toughening methods for waterborne epoxy coatings by providing a wear-resistant and toughened waterborne epoxy resin coating and its preparation method.

[0007] The technical solution adopted in this invention is: a wear-resistant and toughened waterborne epoxy resin coating, composed of the following components A and B, wherein the content of the components is in parts by mass;

[0008] Component A: 65-70 parts of E-44 type epoxy resin, 10-15 parts of wear-resistant toughening agent, 3-4 parts of CO897 emulsifier, 1-2 parts of LJ emulsifier, and 80 parts of deionized water;

[0009] Component B: 5-7 parts talc, 12-15 parts rutile titanium dioxide, 8-10 parts wet-process sericite powder, 10-12 parts barium sulfate powder, 1-2 parts ET810 anti-wear agent, 0.12-0.15 parts A10 defoamer, 0.15-0.2 parts 2020 leveling agent, 0.15-0.2 parts hydroxyethyl cellulose, 0.5-0.8 parts BYK-3840 ultraviolet absorber, 0.5-0.7 parts 2,6-di-tert-butyl-p-cresol antioxidant, 0.5 parts Texanal film-forming aid, 30-32 parts waterborne epoxy curing agent, and 32 parts industrial water.

[0010] The preparation method of the above-mentioned wear-resistant and toughened waterborne epoxy resin coating includes the following steps:

[0011] Step 1: Preparation of Component A

[0012] Emulsification process: Add 65-70 parts of E-44 epoxy resin to the emulsification kettle, heat to 65℃, then add 10-15 parts of wear-resistant toughening agent, stir and mix evenly, then add 3-4 parts of CO897 emulsifier and 1-2 parts of LJ emulsifier, start the emulsifier, and gradually add 80 parts of deionized water to the emulsification kettle in 3 batches, maintaining the emulsification speed at 2000-3000 r / min and the emulsification time at 20-30 min, to obtain epoxy resin emulsion component A with a solid content of 50-52% and an epoxy value of 0.196-0.205 mol / 100g;

[0013] Step 2: Preparation of Component B

[0014] Dispersion process: First, add 30-32 parts of water-based epoxy curing agent to a 150 kg dispersion vessel, then add 5-7 parts of talc powder, 12-15 parts of rutile titanium dioxide, 8-10 parts of wet-process sericite powder, 10-12 parts of barium sulfate powder, 1-2 parts of ET810 anti-wear agent, 0.12-0.15 parts of A10 defoamer, 0.15-0.2 parts of 2020 leveling agent, 0.15-0.2 parts of hydroxyethyl cellulose, 0.5-0.8 parts of BYK-3840 ultraviolet absorber, 0.5-0.7 parts of 2,6-di-tert-butyl-p-cresol antioxidant, and 0.5 parts of Texanal film-forming aid. Finally, add 32 parts of industrial water. Disperse the mixture using a basket mill for 30-60 min to prepare component B; the amine value is 0.099-0.211 mol / 100g.

[0015] Step 3: Wear-resistant and toughened waterborne epoxy resin coating

[0016] Mix components A and B at a mass ratio of 1:2, with a molar ratio of epoxy value to amine value of approximately 1:1. Stir rapidly for 5–10 minutes until homogeneous to form a wear-resistant and toughened waterborne epoxy resin coating with a solid content greater than 50%.

[0017] The preparation process of the wear-resistant toughening agent is as follows:

[0018] Step 1: Reaction of polyethylene glycol with diisocyanate

[0019] Weigh 2 mol of polyethylene glycol (200-400 parts) and add it to a mixer. Dehydrate it at 120℃ and 0.08-0.09 MPa for 2 hours. Then cool it down. When the temperature drops to 50℃, turn off the vacuum system and accurately add 0.93-0.96 mol of MDI-50 or MDI-100 diisocyanate (233-240 parts). React at 50℃ for 1 hour. Then raise the temperature to 80℃ and react for 2.5 hours. Finally, degas it under vacuum at 0.08-0.09 MPa for 15 minutes to obtain the polyethylene glycol-terminated isocyanate reaction product.

[0020] Step 2: Etherification reaction

[0021] Add 2.21-2.24 parts of boron trifluoride diethyl ether catalyst (0.35% by mass of the polyethylene glycol end-capping reaction product) to the above polyethylene glycol end-capping reaction product. Maintain the temperature at 45°C with stirring, and start adding 2.2 mol of epichlorohydrin (204 parts) dropwise to carry out the etherification reaction. Turn on the reflux device on the reactor and finish adding the catalyst in 1.5 hours. Then raise the temperature to 60°C and continue the reflux reaction for 3 hours to complete the etherification stage.

[0022] Step 3: Cycling reaction

[0023] The product of the second step reaction was cooled to 45°C, and 184 parts of sodium hydroxide diluent dispersion were added in three portions, including 84 parts of NaOH and 100 parts of 95% industrial ethanol diluent. After the dispersion was added, the reaction was refluxed at 50-55°C for 3 hours to close the ring. The ring-closing reaction was then completed.

[0024] Preparation of NaOH diluent dispersion: Crush NaOH into powder using a pulverizer and add it to a plastic container. Then add 1 to 2 times the mass of sodium hydroxide and 95% industrial ethanol diluent. Stir and disperse evenly.

[0025] Step 4: Distillation to remove small molecules

[0026] Turn off the reflux condenser and turn on the recovery condenser. Heat the reaction material after the second step reaction to 60°C and maintain a vacuum of 0.08-0.09 MPa to remove byproduct water, a small amount of unreacted epichlorohydrin and ethanol diluent. This further disrupts the reaction equilibrium, shifting the reaction towards the product side and increasing the yield of polyethylene glycol polyurethane epoxy toughening agent. Continue this process until no more condensate flows out. The distilled small molecule compounds are then recovered and reused.

[0027] Step 5: Centrifugal filtration

[0028] The mixture in the reaction vessel after distillation in the fourth step is centrifuged and filtered to separate the solid and liquid components. The filtrate is collected to obtain the product, reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, i.e., wear-resistant toughening agent, with an epoxy value of 0.265~0.269mol / 100g.

[0029] Abrasion-resistant toughening agent - Synthesis reaction mechanism of reactive polyethylene glycol polyurethane epoxy abrasion-resistant toughening agent:

[0030]

[0031] Furthermore, the preparation process of the LJ emulsifier is as follows:

[0032] Take 80 parts of polyethylene glycol 8000 resin and 5 parts of E-20 epoxy resin, add them to a reaction vessel, and melt them at 70°C. Then add 0.34 parts of boron trifluoride diethyl ether complex catalyst, heat to 80°C and stir for 5-6 hours, with the stirring speed controlled at 40-50 r / min. After the reaction is completed, add 34 parts of deionized water and stir for 30-40 minutes to obtain LJ emulsifier.

[0033] Furthermore, the E-44 type epoxy resin, CO897 emulsifier, talc powder, rutile titanium dioxide, wet-process sericite powder, barium sulfate powder, ET810 anti-wear agent, A10 defoamer, 2020 leveling agent, hydroxyethyl cellulose, BYK-3840 ultraviolet absorber, 2,6-di-tert-butyl-p-cresol antioxidant, and Texanal film-forming aid are commercially available industrial products.

[0034] Furthermore, the talc powder, rutile titanium dioxide, wet-process sericite powder, and barium sulfate powder have a mesh size greater than 800 mesh.

[0035] Furthermore, the water-based epoxy curing agent is produced by Shanxi Yongli Industrial Co., Ltd.

[0036] The present invention has the following advantages:

[0037] First, the wear-resistant toughening agent of the present invention is a reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, which modifies epoxy resin in the form of a block copolymer, changes the toughening molecular structure of traditional glycidyl ether, and assembles the polyurethane molecular structure into the epoxy resin molecular structure, so that it has the wear-resistant and toughening properties of polyurethane.

[0038] Secondly, the high molecular weight LJ emulsifier of the present invention contains hydrophilic hydroxyl groups and ether bonds, as well as lipophilic epoxy groups and phenyl groups. It is a reactive emulsifier and has good emulsifying and emulsion stabilizing effects on epoxy resins.

[0039] Third, the waterborne epoxy resin coating of the present invention has high toughness, which improves the inherent brittleness of epoxy resin coatings. At the same time, due to the addition of reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, the epoxy coating is endowed with wear resistance, impact resistance, bending resistance and comprehensive mechanical properties, thus expanding the application field of epoxy resin.

[0040] Fourth, the water-based epoxy resin coating of this invention contains no organic solvents, is green and environmentally friendly.

[0041] Fifth, the waterborne epoxy resin coating of the present invention has good fluidity, is easy to use, and after curing into a film, it also has good mechanical properties such as flexibility and wear resistance. In addition, it is easy to prepare and has low cost.

[0042] Sixth, the present invention has a uniform system with no impurities, no hard lumps, no sediment, no layering. Detailed Implementation

[0043] Example 1

[0044] The wear-resistant and toughening waterborne epoxy resin coating described in this embodiment is composed of the following components A and B, wherein the content of the components is in parts by mass; wherein:

[0045] Component A: 65 parts of E-44 type epoxy resin, 15 parts of wear-resistant toughening agent, 4 parts of CO897 emulsifier, 2 parts of LJ emulsifier, and 80 parts of deionized water;

[0046] Component B: 5 parts talc, 15 parts rutile titanium dioxide, 10 parts wet-process sericite powder, 12 parts barium sulfate powder, 2 parts ET810 anti-wear agent, 0.15 parts A10 defoamer, 0.2 parts 2020 leveling agent, 0.2 parts hydroxyethyl cellulose, 0.8 parts BYK-3840 ultraviolet absorber, 0.7 parts 2,6-di-tert-butyl-p-cresol antioxidant, 0.5 parts Texanal film-forming aid, 30 parts waterborne epoxy curing agent, and 32 parts industrial water.

[0047] Preparation of the wear-resistant and toughening waterborne epoxy resin coating

[0048] Step 1: Preparation of Component A

[0049] Emulsification process: Add 65 parts of E-44 epoxy resin to the emulsification kettle and heat to 65℃. Then add 15 parts of wear-resistant toughening agent and stir to mix evenly. Next, add 4 parts of CO897 emulsifier and 2 parts of LJ emulsifier. Start the emulsifier and gradually add 80 parts of deionized water to the emulsification kettle in 3 batches. Maintain the emulsification speed at 2000-3000 r / min and the emulsification time at 20-30 min to obtain epoxy resin emulsion component A with a solid content of 50-52% and an epoxy value of 0.196-0.205 mol / 100g.

[0050] Step 2: Preparation of Component B

[0051] Dispersion process: First, add 30 parts of water-based epoxy curing agent to a 150 kg dispersion vessel, then add 5 parts of talc powder, 15 parts of rutile titanium dioxide, 10 parts of wet-process sericite powder, 12 parts of barium sulfate powder, 2 parts of ET810 anti-wear agent, 0.15 parts of A10 defoamer, 0.2 parts of 2020 leveling agent, 0.2 parts of hydroxyethyl cellulose, 0.8 parts of BYK-3840 ultraviolet absorber, 0.7 parts of 2,6-di-tert-butyl-p-cresol antioxidant, and 0.5 parts of Texanal film-forming aid. Finally, add 32 parts of industrial water. Disperse the mixture using a basket mill for 30-60 minutes to prepare component B; amine value: 0.099-0.211 mol / 100g.

[0052] Step 3: Wear-resistant and toughened waterborne epoxy resin coating

[0053] Mix components A and B at a mass ratio of 1:2, with a molar ratio of epoxy value to amine value of approximately 1:1. Stir rapidly for 5–10 minutes until homogeneous to form a wear-resistant and toughened waterborne epoxy coating. This waterborne epoxy resin coating has a solid content greater than 50%, and exhibits a uniform system free of impurities, lumps, sediment, and stratification.

[0054] This coating can be applied by brushing or spraying. The viscosity can be adjusted with industrial water. The first coat can be thinned before application, while subsequent coats should be applied after the surface is dry. At 25°C, the surface drying time is 20-30 minutes, and the complete curing time is 20-24 hours. Since the pot life of the mixed components A and B is approximately 2 hours, the mixture should be applied as soon as possible. All tools, especially the spray gun, should be thoroughly cleaned with water after use. This wear-resistant and toughening waterborne epoxy coating can be applied to concrete sealing primers, industrial floor coatings, waterproofing and seepage prevention materials, tunnel lighting projects, and road crack sealing and repair materials.

[0055] In this embodiment, the preparation process of the wear-resistant toughening agent

[0056] The first step involves the reaction of polyethylene glycol with diisocyanate.

[0057] Weigh 2 mol of polyethylene glycol (200-400 parts) and add it to a mixer. Dehydrate the mixture at 120℃ and 0.08-0.09 MPa for 2 hours. Then cool the mixture down to 50℃, turn off the vacuum system, and accurately add 0.95 mol of MDI-50 diisocyanate (238 parts). React at 50℃ for 1 hour, then raise the temperature to 80℃ and react for 2.5 hours. Finally, degas the mixture under vacuum at 0.08-0.09 MPa for 15 minutes to obtain the polyethylene glycol-terminated isocyanate reaction product.

[0058] The second step is the etherification reaction.

[0059] Add 2.23 parts of boron trifluoride diethyl ether catalyst with a mass content of 0.35% of the polyethylene glycol end-capping reaction product to the above polyethylene glycol end-capping reaction product. Maintain the temperature at 45°C with stirring, and start adding 2.2 mol of epichlorohydrin (204 parts) dropwise to carry out the etherification reaction. Turn on the reflux device on the reactor and finish adding the catalyst in 1.5 hours. Then raise the temperature to 60°C and continue the reflux reaction for 3 hours to complete the etherification stage.

[0060] The third step is the cyclization reaction.

[0061] The product from the second step reaction was cooled to 45°C, and 184 parts of a sodium hydroxide diluent dispersion were added in three portions, including 84 parts NaOH and 100 parts 95% industrial ethanol diluent. After the dispersion was added, the mixture was refluxed at 50–55°C for 3 hours to complete the ring-closure reaction.

[0062] The NaOH diluent dispersion is prepared by pulverizing NaOH into powder using a pulverizer and adding it to a plastic container. Then, add 1 to 2 times the mass of 95% industrial ethanol diluent and stir to disperse evenly.

[0063] The fourth step is distillation to remove small molecules.

[0064] Turn off the reflux condenser and turn on the recovery condenser. Heat the reaction material after the second step reaction to 60°C and maintain a vacuum of 0.08-0.09 MPa to remove byproduct water, a small amount of unreacted epichlorohydrin and ethanol diluent. This further disrupts the reaction equilibrium, shifting the reaction towards the product side and increasing the yield of polyethylene glycol polyurethane epoxy toughening agent. Continue this process until no more condensate flows out. The distilled small molecule compounds are then recovered and reused.

[0065] Step 5: Centrifugal filtration

[0066] After the fourth step of distillation, the mixture in the reaction vessel was centrifuged and filtered to separate the solid and liquid components. The filtrate was collected to obtain the product, reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, i.e., wear-resistant toughening agent, with an epoxy value of approximately 0.266 mol / 100g.

[0067] In this embodiment, the LJ emulsifier preparation process

[0068] Take 80 parts of polyethylene glycol 8000 resin and 5 parts of E-20 epoxy resin, add them to a reaction vessel, and melt them at 70°C. Then add 0.34 parts of boron trifluoride diethyl ether complex catalyst, heat to 80°C and stir for 5-6 hours, controlling the stirring speed at 40-50 r / min. After the reaction is completed, add 34 parts of deionized water and stir for 30-40 minutes to obtain LJ emulsifier.

[0069] Example 2

[0070] The wear-resistant and toughening waterborne epoxy resin coating described in this embodiment is composed of the following components A and B, wherein the content of the components is in parts by mass; wherein:

[0071] Component A: 70 parts E-44 type epoxy resin, 10 parts wear-resistant toughening agent, 3 parts CO897 emulsifier, 1 part LJ emulsifier, and 80 parts deionized water.

[0072] Component B: 7 parts talc, 12 parts rutile titanium dioxide, 8 parts wet-process sericite powder, 10 parts barium sulfate powder, 2 parts ET810 anti-wear agent, 0.15 parts A10 defoamer, 0.2 parts 2020 leveling agent, 0.2 parts hydroxyethyl cellulose, 0.8 parts BYK-3840 ultraviolet absorber, 0.7 parts 2,6-di-tert-butyl-p-cresol antioxidant, 0.5 parts Texanal film-forming aid, 30 parts waterborne epoxy curing agent, and 32 parts industrial water.

[0073] Preparation of the wear-resistant and toughened waterborne epoxy resin coating

[0074] Step 1: Preparation of Component A

[0075] Emulsification process: Add 70 parts of E-44 epoxy resin to the emulsification kettle, heat to 65℃, then add 10 parts of wear-resistant toughening agent, stir and mix evenly, then add 3 parts of CO897 emulsifier and 1 part of LJ emulsifier, start the emulsifier, and gradually add 80 parts of deionized water to the emulsification kettle in 3 batches, maintaining the emulsification speed at 2000-3000 r / min and the emulsification time at 20-30 min, to obtain epoxy resin emulsion component A with a solid content of 50-52% and an epoxy value of 0.196-0.205 mol / 100g.

[0076] Step 2: Preparation of Component B

[0077] Dispersion process: First, add 30 parts of water-based epoxy curing agent to a 150 kg dispersion vessel. Then, add 7 parts of talc powder, 12 parts of rutile titanium dioxide, 8 parts of wet-process sericite powder, 10 parts of barium sulfate powder, 2 parts of ET810 anti-wear agent, 0.15 parts of A10 defoamer, 0.2 parts of 2020 leveling agent, 0.2 parts of hydroxyethyl cellulose, 0.8 parts of BYK-3840 ultraviolet absorber, 0.7 parts of 2,6-di-tert-butyl-p-cresol antioxidant, and 0.5 parts of Texanal film-forming aid. Finally, add 32 parts of industrial water. Disperse using a basket mill for 30–60 min to prepare component B. Amine value: 0.099–0.211 mol / 100g

[0078] Step 3: Preparation of wear-resistant and toughened waterborne epoxy resin coating

[0079] Mix components A and B at a mass ratio of 1:2, with a molar ratio of epoxy value to amine value of approximately 1:1. Stir rapidly for 5–10 minutes until homogeneous to form a wear-resistant and toughened waterborne epoxy coating. This waterborne epoxy resin coating has a solid content greater than 50%, and exhibits a uniform system with no impurities, no hard lumps, no sedimentation, and no stratification.

[0080] This coating can be applied by brushing or spraying. The viscosity can be adjusted with industrial water. The first coat can be thinned before application, while subsequent coats should be applied after the surface is dry. At 25°C, the surface drying time is 20-30 minutes, and the complete curing time is 20-24 hours. Since the pot life of the mixed components A and B is approximately 2 hours, the mixture should be applied as soon as possible. All tools, especially the spray gun, should be thoroughly cleaned with water after use. This wear-resistant and toughening waterborne epoxy coating can be applied to concrete sealing primers, industrial floor coatings, waterproofing and seepage prevention materials, tunnel lighting projects, and road crack sealing and repair materials.

[0081] The preparation process of the wear-resistant toughening agent

[0082] Step 1: Reaction of polyethylene glycol with diisocyanate

[0083] Weigh 2 mol of polyethylene glycol (200-400 parts) and add it to a mixer. Dehydrate the mixture at 120℃ and 0.08-0.09 MPa for 2 hours. Then cool the mixture down to 50℃, turn off the vacuum system, and accurately add 0.96 mol of MDI-100 diisocyanate (240 parts). React at 50℃ for 1 hour, then raise the temperature to 80℃ and react for 2.5 hours. Finally, degas the mixture under vacuum at 0.08-0.09 MPa for 15 minutes to obtain the polyethylene glycol-terminated isocyanate reaction product.

[0084] Step 2: Etherification reaction

[0085] Add 2.24 parts of boron trifluoride diethyl ether catalyst with a mass content of 0.35% of the polyethylene glycol end-capping reaction product to the above polyethylene glycol end-capping reaction product. Maintain the temperature at 45°C with stirring, and start adding 2.2 mol of epichlorohydrin (204 parts) dropwise to carry out the etherification reaction. Turn on the reflux device on the reactor and finish adding the catalyst in 1.5 hours. Then raise the temperature to 60°C and continue the reflux reaction for 3 hours to complete the etherification stage.

[0086] Step 3: Cycling reaction

[0087] The product from the second step reaction was cooled to 45°C, and 184 parts of a sodium hydroxide diluent dispersion were added in three portions, including 84 parts NaOH and 100 parts 95% industrial ethanol diluent. After the dispersion was added, the mixture was refluxed at 50–55°C for 3 hours to complete the ring-closure reaction.

[0088] The NaOH diluent dispersion is prepared by pulverizing NaOH into powder using a pulverizer and adding it to a plastic container. Then, add 1 to 2 times the mass of 95% industrial ethanol diluent and stir to disperse evenly.

[0089] Step 4: Distillation to remove small molecules

[0090] Turn off the reflux condenser and turn on the recovery condenser. Heat the reaction material after the second step reaction to 60°C and maintain a vacuum of 0.08-0.09 MPa to remove byproduct water, a small amount of unreacted epichlorohydrin and ethanol diluent. This further disrupts the reaction equilibrium, shifting the reaction towards the product side and increasing the yield of polyethylene glycol polyurethane epoxy toughening agent. Continue this process until no more condensate flows out. The distilled small molecule compounds are then recovered and reused.

[0091] Step 5: Centrifugal filtration

[0092] After the fourth step of distillation, the mixture in the reaction vessel was centrifuged and filtered to separate the solid and liquid components. The filtrate was collected to obtain the product, reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, i.e., wear-resistant toughening agent, with an epoxy value of approximately 0.265 mol / 100g.

[0093] The LJ emulsifier preparation process

[0094] Take 80 parts of polyethylene glycol 8000 resin and 5 parts of E-20 epoxy resin, add them to a reaction vessel, and melt them at 70°C. Then add 0.34 parts of boron trifluoride diethyl ether complex catalyst, heat to 80°C and stir for 5-6 hours, controlling the stirring speed at 40-50 r / min. After the reaction is completed, add 34 parts of deionized water and stir for 30-40 minutes to obtain LJ emulsifier.

[0095] Example 3

[0096] The wear-resistant and toughening waterborne epoxy resin coating described in this embodiment is composed of the following components A and B, wherein the content of the components is in parts by mass; wherein:

[0097] Component A: 67 parts of E-44 type epoxy resin, 13 parts of wear-resistant toughening agent, 4 parts of CO897 emulsifier, 1 part of LJ emulsifier, and 80 parts of deionized water.

[0098] Component B: 6 parts talc, 14 parts rutile titanium dioxide, 9 parts wet-process sericite powder, 11 parts barium sulfate powder, 2 parts ET810 anti-wear agent, 0.14 parts A10 defoamer, 0.17 parts 2020 leveling agent, 0.17 parts hydroxyethyl cellulose, 0.7 parts BYK-3840 ultraviolet absorber, 0.6 parts 2,6-di-tert-butyl-p-cresol antioxidant, 0.5 parts Texanal film-forming aid, 31 parts waterborne epoxy curing agent, and 32 parts industrial water.

[0099] Preparation of the wear-resistant and toughened waterborne epoxy resin coating

[0100] Step 1: Preparation of Component A

[0101] Emulsification process: 67 parts of E-44 epoxy resin were added to the emulsification kettle and heated to 65℃. Then, 13 parts of wear-resistant toughening agent were added and stirred until uniform. Next, 4 parts of CO897 emulsifier and 1 part of LJ emulsifier were added. The emulsifier was started and 80 parts of deionized water were gradually added to the emulsification kettle in 3 batches. The emulsification speed was maintained at 2000-3000 r / min and the emulsification time was 20-30 min. Component A of epoxy resin emulsion with a solid content of 50-52% and an epoxy value of 0.196-0.205 mol / 100g were obtained.

[0102] Step 2: Preparation of Component B

[0103] Dispersion process: First, add 31 parts of water-based epoxy curing agent to a 150 kg dispersion vessel. Then, add 6 parts of talc powder, 14 parts of rutile titanium dioxide, 9 parts of wet-process sericite powder, 11 parts of barium sulfate powder, 2 parts of ET810 anti-wear agent, 0.14 parts of A10 defoamer, 0.17 parts of 2020 leveling agent, 0.17 parts of hydroxyethyl cellulose, 0.7 parts of BYK-3840 ultraviolet absorber, 0.6 parts of 2,6-di-tert-butyl-p-cresol antioxidant, and 0.5 parts of Texanal film-forming aid. Finally, add 32 parts of industrial water. Disperse using a basket mill for 30–60 min to prepare component B. Amine value: 0.099–0.211 mol / 100g

[0104] Step 3: Wear-resistant and toughened waterborne epoxy resin coating

[0105] Mix components A and B at a mass ratio of 1:2, with a molar ratio of epoxy value to amine value of approximately 1:1. Stir rapidly for 5–10 minutes until homogeneous to form a wear-resistant and toughened waterborne epoxy coating. The coating has a solid content greater than 50%, and is free of impurities, lumps, sediment, and stratification, exhibiting a uniform system.

[0106] This coating can be applied by brushing or spraying. The viscosity can be adjusted with industrial water. The first coat can be thinned before application, while subsequent coats should be applied after the surface is dry. At 25°C, the surface drying time is 20-30 minutes, and the complete curing time is 20-24 hours. Since the pot life of the mixed components A and B is approximately 2 hours, the mixture should be applied as soon as possible. All tools, especially the spray gun, should be thoroughly cleaned with water after use. This wear-resistant and toughening waterborne epoxy coating can be applied to concrete sealing primers, industrial floor coatings, waterproofing and seepage prevention materials, tunnel lighting projects, and road crack sealing and repair materials.

[0107] The preparation process of the wear-resistant toughening agent

[0108] Step 1: Reaction of polyethylene glycol with diisocyanate

[0109] Weigh 2 mol of polyethylene glycol (200-400 parts) and add it to a mixer. Dehydrate the mixture at 120℃ and 0.08-0.09 MPa for 2 hours. Then cool the mixture down to 50℃, turn off the vacuum system, and accurately add 0.93 mol of MDI-50 diisocyanate (233 parts). React at 50℃ for 1 hour, then raise the temperature to 80℃ and react for 2.5 hours. Finally, degas the mixture under vacuum at 0.08-0.09 MPa for 15 minutes to obtain the polyethylene glycol-terminated isocyanate reaction product.

[0110] Step 2: Etherification reaction

[0111] Add 2.21 parts of boron trifluoride diethyl ether catalyst with a mass content of 0.35% of the polyethylene glycol end-capping reaction product to the above polyethylene glycol end-capping reaction product. Maintain the temperature at 45°C with stirring, and start adding 2.2 mol of epichlorohydrin (204 parts) dropwise to carry out the etherification reaction. Turn on the reflux device on the reactor and finish adding the catalyst in 1.5 hours. Then raise the temperature to 60°C and continue the reflux reaction for 3 hours to complete the etherification stage.

[0112] Step 3: Cycling reaction

[0113] The product from the second step reaction was cooled to 45°C, and 184 parts of a sodium hydroxide diluent dispersion were added in three portions, including 84 parts NaOH and 100 parts 95% industrial ethanol diluent. After the dispersion was added, the mixture was refluxed at 50–55°C for 3 hours to complete the ring-closure reaction.

[0114] The NaOH diluent dispersion is prepared by pulverizing NaOH into powder using a pulverizer and adding it to a plastic container. Then, add 1 to 2 times the mass of 95% industrial ethanol diluent and stir to disperse evenly.

[0115] Step 4: Distillation to remove small molecules

[0116] Turn off the reflux condenser and turn on the recovery condenser. Heat the reaction material after the second step reaction to 60°C and maintain a vacuum of 0.08-0.09 MPa to remove byproduct water, a small amount of unreacted epichlorohydrin and ethanol diluent. This further disrupts the reaction equilibrium, shifting the reaction towards the product side and increasing the yield of polyethylene glycol polyurethane epoxy toughening agent. Continue this process until no more condensate flows out. The distilled small molecule compounds are then recovered and reused.

[0117] Step 5: Centrifugal filtration

[0118] After the fourth step of distillation, the mixture in the reaction vessel was centrifuged and filtered to separate the solid and liquid components. The filtrate was collected to obtain the product, reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, i.e., wear-resistant toughening agent, with an epoxy value of approximately 0.269 mol / 100g.

[0119] The preparation process of the LJ emulsifier

[0120] Take 80 parts of polyethylene glycol 8000 resin and 5 parts of E-20 epoxy resin, add them to a reaction vessel, and melt them at 70°C. Then add 0.34 parts of boron trifluoride diethyl ether complex catalyst, heat to 80°C and stir for 5-6 hours, controlling the stirring speed at 40-50 r / min. After the reaction is completed, add 34 parts of deionized water and stir for 30-40 minutes to obtain LJ emulsifier.

[0121] Example 4

[0122] The wear-resistant and toughening waterborne epoxy resin coating described in this embodiment is composed of the following components A and B, wherein the content of the components is in parts by mass; wherein:

[0123] Component A: 66 parts of E-44 type epoxy resin, 15 parts of wear-resistant toughening agent, 3 parts of CO897 emulsifier, 2 parts of LJ emulsifier, and 80 parts of deionized water.

[0124] Component B: 7 parts talc, 12 parts rutile titanium dioxide, 8 parts wet-process sericite powder, 10 parts barium sulfate powder, 1 part ET810 anti-wear agent, 0.13 parts A10 defoamer, 0.18 parts 2020 leveling agent, 0.19 parts hydroxyethyl cellulose, 0.8 parts BYK-3840 ultraviolet absorber, 0.7 parts 2,6-di-tert-butyl-p-cresol antioxidant, 0.5 parts Texanal film-forming aid, 32 parts waterborne epoxy curing agent, and 32 parts industrial water.

[0125] Preparation of the wear-resistant and toughening waterborne epoxy resin coating

[0126] Step 1: Preparation of Component A

[0127] Emulsification process: Add 66 parts of E-44 epoxy resin to the emulsification kettle, heat to 65℃, then add 15 parts of wear-resistant toughening agent, stir and mix evenly, then add 3 parts of CO897 emulsifier and 2 parts of LJ emulsifier, start the emulsifier, and gradually add 80 parts of deionized water to the emulsification kettle in 3 batches, maintain the emulsification speed at 2000-3000 r / min, and the emulsification time at 20-30 min, to obtain epoxy resin emulsion component A with a solid content of 50-52% and an epoxy value of 0.196-0.205 mol / 100g.

[0128] Step 2: Preparation of Component B

[0129] Dispersion process: First, add 32 parts of water-based epoxy curing agent to a 150 kg dispersion vessel. Then, add 7 parts of talc powder, 12 parts of rutile titanium dioxide, 8 parts of wet-process sericite powder, 10 parts of barium sulfate powder, 1 part of ET810 anti-wear agent, 0.13 parts of A10 defoamer, 0.18 parts of 2020 leveling agent, 0.19 parts of hydroxyethyl cellulose, 0.8 parts of BYK-3840 ultraviolet absorber, 0.7 parts of 2,6-di-tert-butyl-p-cresol antioxidant, and 0.5 parts of Texanal film-forming aid. Finally, add 32 parts of industrial water. Disperse using a basket mill for 30–60 min to prepare component B. Amine value: 0.099–0.211 mol / 100g

[0130] Step 3: Wear-resistant and toughened waterborne epoxy resin coating

[0131] Mix components A and B at a mass ratio of 1:2, with a molar ratio of epoxy value to amine value of approximately 1:1. Stir rapidly for 5-10 minutes until homogeneous to form a wear-resistant and toughened waterborne epoxy coating. The coating of this invention has a solid content of more than 50%, and is free of impurities, lumps, sediment, and stratification, forming a homogeneous system.

[0132] This coating can be applied by brushing or spraying. The viscosity can be adjusted with industrial water. The first coat can be thinned before application, while subsequent coats should be applied after the surface is dry. At 25°C, the surface drying time is 20-30 minutes, and the complete curing time is 20-24 hours. Since the pot life of the mixed components A and B is approximately 2 hours, the mixture should be applied as soon as possible. All tools, especially the spray gun, should be thoroughly cleaned with water after use. This wear-resistant and toughening waterborne epoxy coating can be applied to concrete sealing primers, industrial floor coatings, waterproofing and seepage prevention materials, tunnel lighting projects, and road crack sealing and repair materials.

[0133] The preparation process of the wear-resistant toughening agent

[0134] Step 1: Reaction of polyethylene glycol with diisocyanate

[0135] Weigh 2 mol of polyethylene glycol (200-400 parts) and add it to a mixer. Dehydrate the mixture at 120℃ and 0.08-0.09 MPa for 2 hours. Then cool the mixture down to 50℃, turn off the vacuum system, and accurately add 0.94 mol of MDI-50 diisocyanate (235 parts). React at 50℃ for 1 hour, then raise the temperature to 80℃ and react for 2.5 hours. Finally, degas the mixture under vacuum at 0.08-0.09 MPa for 15 minutes to obtain the polyethylene glycol-terminated isocyanate reaction product.

[0136] Step 2, etherification reaction:

[0137] Add 2.22 parts of boron trifluoride diethyl ether catalyst with a mass content of 0.35% of the polyethylene glycol end-capping reaction product to the above polyethylene glycol end-capping reaction product. Maintain the temperature at 45°C with stirring, and start adding 2.2 mol of epichlorohydrin (204 parts) dropwise to carry out the etherification reaction. Turn on the reflux device on the reactor and finish adding the catalyst in 1.5 hours. Then raise the temperature to 60°C and continue the reflux reaction for 3 hours to complete the etherification stage.

[0138] Step 3: Cycling reaction

[0139] The product from the second step reaction was cooled to 45°C, and 184 parts of a sodium hydroxide diluent dispersion were added in three portions, including 84 parts NaOH and 100 parts 95% industrial ethanol diluent. After the dispersion was added, the mixture was refluxed at 50–55°C for 3 hours to complete the ring-closure reaction.

[0140] The NaOH diluent dispersion is prepared by pulverizing NaOH into powder using a pulverizer and adding it to a plastic container. Then, add 1 to 2 times the mass of 95% industrial ethanol diluent and stir to disperse evenly.

[0141] Step 4: Distillation to remove small molecules

[0142] Turn off the reflux condenser and turn on the recovery condenser. Heat the reaction material after the second step reaction to 60°C and maintain a vacuum of 0.08-0.09 MPa to remove byproduct water, a small amount of unreacted epichlorohydrin and ethanol diluent. This further disrupts the reaction equilibrium, shifting the reaction towards the product side and increasing the yield of polyethylene glycol polyurethane epoxy toughening agent. Continue this process until no more condensate flows out. The distilled small molecule compounds are then recovered and reused.

[0143] Step 5: Centrifugal filtration

[0144] After the fourth step of distillation, the mixture in the reaction vessel was centrifuged and filtered to separate the solid and liquid components. The filtrate was collected to obtain the product, reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, i.e., wear-resistant toughening agent, with an epoxy value of 0.267 mol / 100g.

[0145] The LJ emulsifier preparation process

[0146] Take 80 parts of polyethylene glycol 8000 resin and 5 parts of E-20 epoxy resin, add them to a reaction vessel, and melt them at 70°C. Then add 0.34 parts of boron trifluoride diethyl ether complex catalyst, heat to 80°C and stir for 5-6 hours, controlling the stirring speed at 40-50 r / min. After the reaction is completed, add 34 parts of deionized water and stir for 30-40 minutes to obtain LJ emulsifier.

[0147] Example 5

[0148] The wear-resistant and toughening waterborne epoxy resin coating described in this embodiment is composed of the following components A and B, wherein the content of the components is in parts by mass; wherein:

[0149] Component A: 69 parts of E-44 type epoxy resin, 14 parts of wear-resistant toughening agent, 4 parts of CO897 emulsifier, 1 part of LJ emulsifier, and 80 parts of deionized water.

[0150] Component B: 6 parts talc, 14 parts rutile titanium dioxide, 10 parts wet-process sericite powder, 10 parts barium sulfate powder, 2 parts ET810 anti-wear agent, 0.15 parts A10 defoamer, 0.18 parts 2020 leveling agent, 0.2 parts hydroxyethyl cellulose, 0.8 parts BYK-3840 ultraviolet absorber, 0.6 parts 2,6-di-tert-butyl-p-cresol antioxidant, 0.5 parts Texanal film-forming aid, 32 parts waterborne epoxy curing agent, and 32 parts industrial water.

[0151] Preparation of the wear-resistant and toughening waterborne epoxy resin coating

[0152] Step 1: Preparation of Component A

[0153] Emulsification process: Add 69 parts of E-44 epoxy resin to the emulsification kettle and heat to 65℃. Then add 14 parts of wear-resistant toughening agent and stir to mix evenly. Next, add 4 parts of CO897 emulsifier and 1 part of LJ emulsifier. Start the emulsifier and gradually add 80 parts of deionized water to the emulsification kettle in 3 batches. Maintain the emulsification speed at 2000-3000 r / min and the emulsification time at 20-30 min to obtain epoxy resin emulsion component A with a solid content of 50-52% and an epoxy value of 0.196-0.205 mol / 100g.

[0154] Step 2: Preparation of Component B

[0155] Dispersion process: First, add 32 parts of water-based epoxy curing agent to a 150 kg dispersion vessel. Then, add 6 parts of talc powder, 14 parts of rutile titanium dioxide, 10 parts of wet-process sericite powder, 10 parts of barium sulfate powder, 2 parts of ET810 anti-wear agent, 0.15 parts of A10 defoamer, 0.18 parts of 2020 leveling agent, 0.2 parts of hydroxyethyl cellulose, 0.8 parts of BYK-3840 ultraviolet absorber, 0.6 parts of 2,6-di-tert-butyl-p-cresol antioxidant, and 0.5 parts of Texanal film-forming aid. Finally, add 32 parts of industrial water. Disperse using a basket mill for 30–60 min to prepare component B. Amine value: 0.099–0.211 mol / 100g

[0156] Step 3: Wear-resistant and toughened waterborne epoxy resin coating

[0157] Components A and B are mixed at a mass ratio of 1:2, with a molar ratio of epoxy value to amine value of approximately 1:1. The mixture is stirred rapidly for 5 to 10 minutes until homogeneous, forming a wear-resistant and toughened waterborne epoxy coating. The waterborne epoxy resin coating of this invention has a solid content of more than 50%, and is free of impurities, lumps, sediment, and stratification, exhibiting a uniform system.

[0158] This coating can be applied by brushing or spraying. The viscosity can be adjusted with industrial water. The first coat can be thinned before application, while subsequent coats should be applied after the surface is dry. At 25°C, the surface drying time is 20-30 minutes, and the complete curing time is 20-24 hours. Since the pot life of the mixed components A and B is approximately 2 hours, the mixture should be applied as soon as possible. All tools, especially the spray gun, should be thoroughly cleaned with water after use. This wear-resistant and toughening waterborne epoxy coating can be applied to concrete sealing primers, industrial floor coatings, waterproofing and seepage prevention materials, tunnel lighting projects, and road crack sealing and repair materials.

[0159] The preparation process of the wear-resistant toughening agent

[0160] Step 1: Reaction of polyethylene glycol with diisocyanate

[0161] Weigh 2 mol of polyethylene glycol (200-400 parts) and add it to a mixer. Dehydrate the mixture at 120℃ and 0.08-0.09 MPa for 2 hours. Then cool the mixture down to 50℃, turn off the vacuum system, and accurately add 0.95 mol of MDI-100 diisocyanate (238 parts). React at 50℃ for 1 hour, then raise the temperature to 80℃ and react for 2.5 hours. Finally, degas the mixture under vacuum at 0.08-0.09 MPa for 15 minutes to obtain the polyethylene glycol-terminated isocyanate reaction product.

[0162] Step 2: Etherification reaction

[0163] Add 2.23 parts of boron trifluoride diethyl ether catalyst with a mass content of 0.35% of the polyethylene glycol end-capping reaction product to the above polyethylene glycol end-capping reaction product. Maintain the temperature at 45°C with stirring, and start adding 2.2 mol of epichlorohydrin (204 parts) dropwise to carry out the etherification reaction. Turn on the reflux device on the reactor and finish adding the catalyst in 1.5 hours. Then raise the temperature to 60°C and continue the reflux reaction for 3 hours to complete the etherification stage.

[0164] Step 3: Cycling reaction

[0165] The product from the second step reaction was cooled to 45°C, and 184 parts of a sodium hydroxide diluent dispersion were added in three portions, including 84 parts NaOH and 100 parts 95% industrial ethanol diluent. After the dispersion was added, the mixture was refluxed at 50–55°C for 3 hours to complete the ring-closure reaction.

[0166] The NaOH diluent dispersion is prepared by pulverizing NaOH into powder using a pulverizer and adding it to a plastic container. Then, add 1 to 2 times the mass of 95% industrial ethanol diluent and stir to disperse evenly.

[0167] The fourth step is distillation to remove small molecules.

[0168] Turn off the reflux condenser and turn on the recovery condenser. Heat the reaction material after the second step reaction to 60°C and maintain a vacuum of 0.08-0.09 MPa to remove byproduct water, a small amount of unreacted epichlorohydrin and ethanol diluent. This further disrupts the reaction equilibrium, shifting the reaction towards the product side and increasing the yield of polyethylene glycol polyurethane epoxy toughening agent. Continue this process until no more condensate flows out. The distilled small molecule compounds are then recovered and reused.

[0169] Step 5: Centrifugal filtration

[0170] After the fourth step of distillation, the mixture in the reaction vessel is centrifuged and filtered to separate the solid and liquid components. The filtrate is collected to obtain the product, reactive polyethylene glycol polyurethane epoxy wear-resistant toughening agent, i.e., wear-resistant toughening agent.

[0171] The preparation process of the LJ emulsifier

[0172] Take 80 parts of polyethylene glycol 8000 resin and 5 parts of E-20 epoxy resin, add them to a reaction vessel, and melt them at 70°C. Then add 0.34 parts of boron trifluoride diethyl ether complex catalyst, heat to 80°C and stir for 5-6 hours, controlling the stirring speed at 40-50 r / min. After the reaction is completed, add 34 parts of deionized water and stir for 30-40 minutes to obtain LJ emulsifier.

[0173] Referring to relevant standards such as GB / T22374 "Floor Coating Materials", GB / T9286 "Cross-cut Test for Paints and Varnishes", GB / T1731 "Determination of Flexibility of Paint Film and Putty Film", GB / T 6742 "Bending Test (Cylindrical Shaft) for Paints and Varnishes", and GB / T6739 "Determination of Hardness of Paint Film by Pencil Method", the mechanical properties of the wear-resistant and toughened waterborne epoxy resin coating of this invention were measured and are shown in Table 1.

[0174] Table 1. Mechanical properties of wear-resistant and toughened waterborne epoxy resin coatings

[0175] name Performance and phenomena Pencil hardness > 2H Abrasion resistance (750g / 500r) / g, ≤ 0.02 Adhesion (grade), ≤ 1 Impact resistance (with a 1000g steel ball) No cracks, no peeling Flexibility (mm) 1. No cracks, no peeling Bending performance (cylindrical shaft), mm 2. No cracks, no peeling Tensile bond strength (MPa), ≥ 2

Claims

1. A wear-resistant and toughened waterborne epoxy resin coating, characterized in that, It is composed of the following components A and B, the content of which is expressed in parts by mass; Component A: 65-70 parts of E-44 type epoxy resin, 10-15 parts of wear-resistant toughening agent, 3-4 parts of CO897 emulsifier, 1-2 parts of LJ emulsifier, and 80 parts of deionized water; Component B: 5-7 parts talc, 12-15 parts rutile titanium dioxide, 8-10 parts wet-process sericite powder, 10-12 parts barium sulfate powder, 1-2 parts ET810 anti-wear agent, 0.12-0.15 parts A10 defoamer, 0.15-0.2 parts 2020 leveling agent, 0.15-0.2 parts hydroxyethyl cellulose, 0.5-0.8 parts BYK-3840 ultraviolet absorber, 0.5-0.7 parts 2,6-di-tert-butyl-p-cresol antioxidant, 0.5 parts Texanal film-forming aid, 30-32 parts waterborne epoxy curing agent, 32 parts industrial water; The preparation process of the wear-resistant toughening agent is as follows: Step 1: Reaction of polyethylene glycol with diisocyanate Weigh 2 mol of polyethylene glycol (200-400 parts) and add it to a mixer. Dehydrate it at 120℃ and 0.08-0.09 MPa for 2 hours. Then cool it down. When the temperature drops to 50℃, turn off the vacuum system and accurately add 0.93-0.96 mol of MDI-50 or MDI-100 diisocyanate (233-240 parts). React at 50℃ for 1 hour, then raise the temperature to 80℃ and react for 2.5 hours. Finally, degas it under vacuum at 0.08-0.09 MPa for 15 minutes to obtain the polyethylene glycol-terminated isocyanate reaction product. Step 2: Etherification reaction Add 2.21-2.24 parts of boron trifluoride diethyl ether catalyst with a mass content of 0.35% of the polyethylene glycol end-capping reaction product to the above polyethylene glycol end-capping reaction product. Maintain the temperature at 45°C with stirring, and start adding 2.2 mol of epichlorohydrin (204 parts) dropwise to carry out the etherification reaction. Turn on the reflux device on the reactor and finish adding the catalyst in 1.5 hours. Then raise the temperature to 60°C and continue the reflux reaction for 3 hours to complete the etherification stage. Step 3: Cycling reaction The product of the second step reaction was cooled to 45°C, and 184 parts of sodium hydroxide diluent dispersion were added in three portions, including 84 parts of NaOH and 100 parts of 95% industrial ethanol diluent. After the dispersion was added, the mixture was refluxed at 50-55°C for 3 hours to close the ring. The ring-closing reaction was then completed. Step 4: Distillation to remove small molecules Step 5: Centrifugal filtration The preparation process of the LJ emulsifier is as follows: Take 80 parts of polyethylene glycol 8000 resin and 5 parts of E-20 epoxy resin, add them to a reaction vessel, dissolve them at 70℃, then add 0.34 parts of boron trifluoride diethyl ether complex catalyst, heat to 80℃ and stir for 5-6 hours, with the stirring speed controlled at 40-50 r / min. After the reaction is completed, add 34 parts of deionized water and stir for 30-40 minutes to obtain LJ emulsifier.

2. The wear-resistant and toughened waterborne epoxy resin coating according to claim 1, characterized in that, The E-44 type epoxy resin, CO897 emulsifier, talc powder, rutile titanium dioxide, wet-process sericite powder, barium sulfate powder, ET810 anti-wear agent, A10 defoamer, 2020 leveling agent, hydroxyethyl cellulose, BYK-3840 ultraviolet absorber, 2,6-di-tert-butyl-p-cresol antioxidant, and Texanal film-forming aid are commercially available industrial products.

3. The wear-resistant and toughened waterborne epoxy resin coating according to claim 1, characterized in that, The talc, rutile titanium dioxide, wet-process sericite powder, and barium sulfate powder have a mesh size greater than 800 mesh.

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