Anti-rust water-based paint for AGV forklift and preparation method thereof

Abstract

The present application discloses an anti-rust water-based paint for AGV forklift and a preparation method thereof, the water-based paint comprises components A, B and C, component A comprises: water-based epoxy resin, defoamer, leveling agent, wetting agent, dispersant, wear-resistant filler, rust inhibitor, anti-settling agent, deionized water; component B comprises curing agent and water; component C is zinc powder; the water-based epoxy resin is prepared by dispersing a main epoxy resin and an organosilicon-modified epoxy resin in an emulsifier solution, the main epoxy resin is a bisphenol F type epoxy resin, and the organosilicon-modified epoxy resin is prepared by reacting bisphenol A type epoxy resin, diphenyl dihydroxy silane, and silane-modified polyether under the catalysis of an organotin catalyst. The water-based paint of the present application has excellent comprehensive properties, and its paint film is superior in flexibility, hardness, low temperature resistance and wear resistance.

Description

Technical Field

[0001] The present application relates to the field of water-based paints, and in particular to an anti-rust water-based paint for AGV forklifts and a preparation method thereof. Background Art

[0002] Automated Guided Vehicle (AGV) is an automated logistics device that can complete material handling tasks without manual driving. It is widely used in manufacturing, warehousing, logistics centers and other scenarios, which can significantly improve work efficiency and reduce labor costs.

[0003] In the cold chain logistics industry, AGV forklifts are often used in refrigerated warehouses, which are usually maintained at a relatively low temperature (such as 0℃ to -20℃) to keep the goods fresh. However, in such a low temperature environment, traditional water-based resin paint films are prone to brittle cracks or peeling. In particular, water-based epoxy resin paint films have a high cross-linking density and good bonding properties, but the paint film hardness is also high, and the brittle cracking problem is more prominent. In addition, the phenomenon of water vapor penetration and rust in cold storage is also more serious, especially when the paint film is damaged, the metal surface of the forklift is exposed, which will accelerate the rust phenomenon. Summary of the invention

[0004] In order to solve the problem that the current water-based epoxy resin paint has poor low-temperature resistance and is prone to cracking and causing serious corrosion, the present application provides an anti-rust water-based paint for AGV forklifts and a preparation method thereof.

[0005] In a first aspect, the present application provides an anti-rust water-based paint for an AGV forklift, which comprises a component A, a component B and a component C in a mass ratio of 1:1:0.15 to 0.25, wherein the component A comprises:

[0006] 100 parts of water-based oxidizing resin, 0.1-0.5 parts of defoaming agent, 1-2 parts of leveling agent, 0.3-1 parts of wetting agent, 1-3 parts of dispersant, 15-30 parts of wear-resistant filler, 1-5 parts of rust inhibitor, 1-2 parts of anti-settling agent, 50-60 parts of deionized water;

[0007] The B component includes 10 to 15 parts of curing agent and 20 to 30 parts of water, calculated by weight percentage;

[0008] The C component is zinc powder;

[0009] The water-based epoxy resin is prepared by dispersing a main epoxy resin and an organosilicon-modified epoxy resin in an emulsifier solution, wherein the main epoxy resin is a bisphenol F epoxy resin, and the organosilicon-modified epoxy resin is prepared by reacting a bisphenol A epoxy resin, diphenyl dihydroxy silane, and a silane-modified polyether under the catalysis of an organotin catalyst, and the mass ratio of the bisphenol A epoxy resin, diphenyl dihydroxy silane, and the silane-modified polyether is 3 to 5:0.2 to 0.5:1.

[0010] Preferably, the preparation method of the organosilicon-modified epoxy resin is:

[0011] Dissolve bisphenol A epoxy resin in an organic solvent to obtain a solution with a solid content of 45-60%, then add diphenyl dihydroxysilane, silane-modified polyether and an organic tin catalyst, mix them evenly and add them to a reaction container, introduce nitrogen into the reaction container under stirring conditions, exhaust the air, then heat to 145-165° C., keep the temperature for reaction, exhaust the water produced during the reaction until no water is produced in the system, and cool to room temperature to obtain an organosilicon-modified epoxy resin.

[0012] Preferably, the mass ratio of the main epoxy resin to the silicone-modified epoxy resin is 2 to 4:1.

[0013] Preferably, the silane-modified polyether is a methoxysilane-terminated polyether.

[0014] Preferably, the bisphenol A epoxy resin has an epoxy equivalent of 450 to 600 g / eq.

[0015] Preferably, the organotin catalyst is dibutyltin dilaurate, and the amount of the organotin catalyst used is 0.8-1.5% of the total mass of bisphenol A epoxy resin, diphenyldihydroxysilane, and silane-modified polyether.

[0016] The main epoxy resin of the present application adopts bisphenol F type epoxy resin with small molecular weight, low viscosity and low epoxy equivalent value. On the one hand, it can reduce the cross-linking density of the paint film and alleviate the problem of brittle cracking of the paint film under high hardness and low temperature; on the other hand, it can compensate for the loss of paint fluidity caused by the addition of zinc powder and filler, which is beneficial to improve the penetration and leveling of water-based paint for tiny gaps, such as welds and weld cracks, and inhibit the formation of undesirable appearances such as cracks during the curing process of the paint film, thereby ensuring the wear resistance of the paint film.

[0017] More importantly, the present application adopts epoxy resin modified by diphenyl dihydroxysilane and silane-modified polyether, which can significantly improve the flexibility of epoxy resin by introducing organosilicon polyether chain, thereby improving the toughness, wear resistance and low temperature resistance of paint film. The introduction of benzene ring group can also appropriately reduce the intermolecular force of epoxy resin and improve the low temperature resistance of paint film. In addition, the introduction of organosilicon polyether chain segment can also improve the hydrophobicity of paint film, and cooperate with zinc powder and rust inhibitor to improve the anti-rust effect of paint film.

[0018] Preferably, the wear-resistant filler is obtained by reacting a spherical filler, an epoxy-containing silane coupling agent and carboxybenzotriazole in a mass ratio of 1:0.3-0.5:0.1-0.3.

[0019] Preferably, the spherical filler is selected from one or more of spherical alumina, spherical zirconia, spherical silica, and spherical calcium carbonate.

[0020] Preferably, the sphericity of the spherical filler is greater than 0.9.

[0021] Preferably, the D50 particle size of the spherical filler is 10 to 40 microns.

[0022] Preferably, the epoxy-containing silane coupling agent is selected from one or more of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltriethoxysilane, 3-(2,3-epoxypropoxy)propylmethyldimethoxysilane, 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane, 3-(2,3-epoxypropoxy)propyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane and γ-glycidyloxypropyltriethoxysilane.

[0023] Preferably, the preparation method of the wear-resistant filler is as follows:

[0024] Add the wear-resistant filler to the ethanol solution of carboxybenzotriazole, mix well, add p-toluenesulfonic acid, heat to 65-75°C, react for 4-6 hours, cool to room temperature, add epoxy-containing silane coupling agent, stir to react for 0.5-1 hour, filter, wash with water, and dry to obtain.

[0025] The use of low molecular weight and epoxy equivalent main resin and the introduction of silicone polyether chains will reduce the crosslinking density of the paint film. This measure can certainly improve the toughness and low temperature resistance of the paint film, but it also causes the loss of hardness and wear resistance of the paint film. In order to compensate for the loss of its wear resistance, this application uses the above-mentioned wear-resistant filler, whose surface is grafted with epoxy silane coupling agent to introduce epoxy groups, which can achieve chemical bonding with epoxy resin under the action of curing agent to increase the hardness of the paint film; at the same time, the benzotriazole ring is introduced through esterification reaction, which can coordinate and complex with the metal ions on the surface of zinc powder, on the one hand, promoting the dispersion of zinc powder, and exerting the reinforcing effect of zinc powder to improve the wear resistance of the paint film; on the other hand, it can play a slow-release protective role on zinc powder and improve its long-term anti-rust performance.

[0026] In addition, it should be noted that the role of spherical fillers is to improve the fluidity of water-based paint and enhance its penetration and covering power into gaps.

[0027] In a second aspect, the present application provides a method for preparing an anti-rust water-based paint for an AGV forklift, which adopts any of the above-mentioned raw material ratios of the water-based paint and performs the following operations:

[0028] Preparation of component A: Weigh the water, wetting agent, defoamer, leveling agent and dispersant in the formula and mix them evenly, then add the wear-resistant filler, stir evenly, grind until the slurry fineness is not more than 40 microns, then add the water-based epoxy resin, rust inhibitor and anti-settling agent, stir evenly to obtain the product;

[0029] Preparation of component B: Weigh the amount of curing agent in the formula and dissolve it in water;

[0030] Preparation of component C: weigh the formulated amount of zinc powder;

[0031] Before use, mix component A, component B and component C according to the proportion.

[0032] Preferably, when the water-based paint is sprayed, the thickness of the wet film layer is controlled to be 70 to 100 microns, more preferably 80 to 90 microns.

[0033] In summary, this application has the following beneficial effects:

[0034] The present application adopts the epoxy resin modified by grafting of organosilicon polyether chain and the epoxy resin with low molecular weight and low epoxy equivalent, which can effectively improve the toughness and low temperature resistance of epoxy resin paint film, and can adapt to the application of cold storage environment. At the same time, it can improve the permeability of paint film to external water vapor and inhibit rust. In addition, the present application uses the spherical filler modified by epoxy silane coupling agent and carboxybenzotriazole surface to compensate for the loss of wear resistance of paint film caused by the aforementioned epoxy resin, and achieve the balance of toughness and hardness, low temperature performance and wear resistance of paint film. DETAILED DESCRIPTION

[0035] Preparation Example

[0036] Preparation Example 1-1, a silicone-modified epoxy resin, the preparation steps are as follows:

[0037] 420g of bisphenol A epoxy resin (epoxy equivalent of 500g / eq) was dissolved in a mixed solvent of ethyl acetate and xylene (volume ratio of 1:1) to obtain a resin solution with a solid content of 55%. 30g of diphenyldihydroxysilane, 100g of silane-modified polyether (kaneka S203) and 6g of dibutyltin dilaurate were added to the resin solution, mixed and stirred evenly and added to a reaction container. Nitrogen was introduced into the reaction container under stirring conditions of 500rpm to exhaust the air, and then heated to 155°C for insulation reaction. During the reaction, the water produced by the reaction was discharged through a water separator until no water was produced in the reaction system, and the material was discharged at room temperature to obtain a silicone-modified epoxy resin.

[0038] Preparation Example 1-2, a silicone-modified epoxy resin, the preparation steps are as follows:

[0039] 340g of bisphenol A epoxy resin (epoxy equivalent of 500g / eq) was dissolved in a mixed solvent of ethyl acetate and xylene (volume ratio of 1:1) to obtain a resin solution with a solid content of 60%. 20g of diphenyl dihydroxysilane, 100g of silane-modified polyether (kaneka SAX350) and 5.3g of dibutyltin dilaurate were added to the resin solution, mixed and stirred evenly and added to a reaction container. Nitrogen was introduced into the reaction container under stirring conditions of 500rpm to exhaust the air, and then heated to 160°C for insulation reaction. During the reaction, the water produced by the reaction was discharged through a water separator until no water was produced in the reaction system, and the material was discharged at room temperature to obtain a silicone-modified epoxy resin.

[0040] Preparation Example 1-3, a silicone-modified epoxy resin, the preparation steps are as follows:

[0041] 500g of bisphenol A epoxy resin (epoxy equivalent of 500g / eq) was dissolved in a mixed solvent of ethyl acetate and xylene (volume ratio of 1:1) to obtain a resin solution with a solid content of 45%. 45g of diphenyldihydroxysilane, 100g of silane-modified polyether (kaneka SAX350) and 7.2g of dibutyltin dilaurate were added to the resin solution, mixed and stirred evenly and added to a reaction container. Nitrogen was introduced into the reaction container under stirring conditions of 500rpm to exhaust the air, and then heated to 160°C for insulation reaction. During the reaction, the water produced by the reaction was discharged through a water separator until no water was produced in the reaction system, and the reaction was discharged at room temperature to obtain a silicone-modified epoxy resin.

[0042] Preparation Example 1-4, a silicone-modified epoxy resin, is different from Preparation Example 1 in that the silane-modified polyether is replaced by an equal amount of diphenyldihydroxysilane.

[0043] Preparation Example 2-1, a wear-resistant filler, the preparation method is as follows:

[0044] Weigh 20g of carboxybenzotriazole, dissolve it in 350mL of ethanol solution, add 100g of spherical silica (D50 particle size 30 microns) and 1.2g of p-toluenesulfonic acid, stir evenly, heat to 72°C, continue stirring and react for 35h, and cool to room temperature; add 40g of γ-(2,3-epoxypropoxy)propyltriethoxysilane, stir and react for 1h, centrifuge and filter, wash the filtered product with water until neutral, and dry it at 50°C for 3h.

[0045] Preparation Example 2-2, a wear-resistant filler, the preparation method is as follows:

[0046] Weigh 10g of carboxybenzotriazole, dissolve it in 300mL of ethanol solution, add 100g of spherical alumina (D50 particle size 20 microns) and 1.0g of p-toluenesulfonic acid, stir evenly, heat to 68°C, continue stirring and react for 4h, and cool to room temperature; add 50g of γ-glycidyloxypropyltriethoxysilane, stir and react for 1h, centrifuge and filter, wash the filtered product with water until neutral, and dry it at 50°C for 3h.

[0047] Preparation Example 2-3, a wear-resistant filler, the preparation method is as follows:

[0048] Weigh 30g of carboxybenzotriazole, dissolve it in 350mL of ethanol solution, add 100g of spherical calcium carbonate (D50 particle size 30 microns) and 1.8g of p-toluenesulfonic acid, stir evenly, heat to 75°C, continue stirring and react for 3h, and cool to room temperature; add 50g of γ-glycidyloxypropyltriethoxysilane, stir and react for 1h, centrifuge and filter, wash the filtered product with water until neutral, and dry it at 50°C for 3h.

[0049] Preparation Example 2-4, a wear-resistant filler, the preparation method is as follows:

[0050] Weigh 60 g of carboxybenzotriazole, dissolve it in 350 mL of ethanol solution, add 100 g of spherical silica (D50 particle size 20 μm) and 2.0 g of p-toluenesulfonic acid, stir evenly, heat to 72°C, continue stirring and react for 6 hours, cool to room temperature; centrifuge and filter, wash the filtered product with water until it is neutral, and dry it at 50°C for 3 hours.

[0051] Preparation Example 2-5, a wear-resistant filler, the preparation method is as follows:

[0052] Weigh 60 g of γ-(2,3-epoxypropoxy)propyltriethoxysilane, dissolve it in 350 mL of ethanol solution, add 100 g of spherical silica and 1.2 g of p-toluenesulfonic acid, stir and react for 1 h, centrifuge and filter, wash the filtered product with water until it is neutral, and dry it at 50°C for 3 h.

[0053] Preparation Example 2-6, a wear-resistant filler, the preparation method is as follows:

[0054] Weigh 60 g of vinyltriethoxysilane, dissolve it in 350 mL of ethanol solution, add 100 g of spherical silica and 1.2 g of p-toluenesulfonic acid, stir and react for 1 h, centrifuge and filter, wash the filtered product with water until it is neutral, and dry it at 50°C for 3 h. Example

[0055] Example 1, an anti-rust water-based paint for AGV forklift, the raw material ratio is as follows:

[0056] Component A: 10kg of water-based epoxy resin, 0.02kg of defoamer (P-09 polyether defoamer), 0.12kg of leveling agent (BYK-3710), 0.08kg of wetting agent (Tween 80), 0.2kg of dispersant (BYK-190), 2kg of wear-resistant filler obtained in Preparation Example 2-1, 0.23kg of rust inhibitor (HZJ-601), 0.1kg of anti-settling agent (DEURHEO WT-115), and 5kg of deionized water.

[0057] Among them, the water-based epoxy resin is prepared according to the following operation: polyoxyethylene fatty alcohol ether (TX-10) is added to the aqueous solution, and an emulsifier solution with a concentration of 3wt% is prepared in a homogenizer, and the solution is heated to 60°C, 1kg of the silicone-modified epoxy resin obtained in Preparation Example 1-1 and 3kg of bisphenol F epoxy resin (epoxy equivalent is 165g / eq) are added, the temperature is raised to 80°C, and the solution is stirred for 3h.

[0058] Component B: 1.2kg curing agent, 2.3kg water.

[0059] Component C: zinc powder.

[0060] The preparation method is as follows:

[0061] Preparation of component A: Weigh the formulated amount of water, wetting agent, defoamer, leveling agent, and dispersant, mix them evenly, then add the wear-resistant filler, stir evenly, grind to a slurry fineness of 30 microns, then add water-based epoxy resin, rust inhibitor, and anti-settling agent, stir evenly.

[0062] Preparation of component B: Weigh the formulated amount of curing agent, stir and dissolve it in water.

[0063] Preparation of component C: Weigh the formulated amount of zinc powder.

[0064] Take 10kg of component A, 10kg of component B and 2kg of component C and mix them.

[0065] Example 2, an anti-rust water-based paint for AGV forklift, the raw material ratio is as follows:

[0066] Component A: 10kg of water-based epoxy resin, 0.02kg of defoamer (P-09 polyether defoamer), 0.15kg of leveling agent (BYK-3710), 0.05kg of wetting agent (Tween 80), 0.1kg of dispersant (BYK-190), 1.5kg of wear-resistant filler obtained in Preparation Example 2-2, 0.15kg of rust inhibitor (HZJ-601), 0.1kg of anti-settling agent (DEURHEO WT-115), and 5kg of deionized water.

[0067] The water-based epoxy resin was prepared as follows: polyoxyethylene fatty alcohol ether (TX-10) was added to the aqueous solution, and an emulsifier solution with a concentration of 3 wt% was prepared in a homogenizer, and the solution was heated to 50°C, 1 kg of the silicone-modified epoxy resin obtained in Preparation Example 1-2 and 2 kg of bisphenol F epoxy resin (epoxy equivalent of 180 g / eq) were added, the temperature was raised to 90°C, and the solution was stirred for 3 hours.

[0068] Component B: 1.0kg curing agent, 2.0kg water.

[0069] Component C: zinc powder.

[0070] The preparation method is as follows:

[0071] Preparation of component A: Weigh the formulated amount of water, wetting agent, defoamer, leveling agent, and dispersant, mix them evenly, then add the wear-resistant filler, stir evenly, grind to a slurry fineness of 20 microns, then add water-based epoxy resin, rust inhibitor, and anti-settling agent, stir evenly.

[0072] Preparation of component B: Weigh the formulated amount of curing agent, stir and dissolve it in water.

[0073] Preparation of component C: Weigh the formulated amount of zinc powder.

[0074] Take 10kg of component A, 10kg of component B and 1.8kg of component C and mix them.

[0075] Example 3, an anti-rust water-based paint for AGV forklift, the raw material ratio is as follows:

[0076] Component A: 10kg of water-based epoxy resin, 0.04kg of defoamer (P-09 polyether defoamer), 0.2kg of leveling agent (BYK-3710), 0.06kg of wetting agent (Tween 80), 0.3kg of dispersant (BYK-190), 3kg of wear-resistant filler obtained in Preparation Example 2-3, 0.45kg of rust inhibitor (HZJ-601), 0.2kg of anti-settling agent (DEURHEO WT-115), and 6kg of deionized water.

[0077] The water-based epoxy resin was prepared according to the following operation: polyoxyethylene fatty alcohol ether (TX-10) was added to the aqueous solution, and an emulsifier solution with a concentration of 2 wt% was prepared in a homogenizer, and the solution was heated to 50°C, 1 kg of the silicone-modified epoxy resin obtained in Preparation Example 1-3 and 4 kg of bisphenol F epoxy resin (epoxy equivalent of 165 g / eq) were added, the temperature was raised to 80°C, and the solution was stirred for 3 hours.

[0078] Component B: 1.2kg curing agent, 2.3kg water.

[0079] Component C: zinc powder.

[0080] The preparation method is as follows:

[0081] Preparation of component A: Weigh the formulated amount of water, wetting agent, defoamer, leveling agent, and dispersant, mix them evenly, then add the wear-resistant filler, stir evenly, grind to a slurry fineness of 30 microns, then add water-based epoxy resin, rust inhibitor, and anti-settling agent, stir evenly.

[0082] Preparation of component B: Weigh the formulated amount of curing agent, stir and dissolve it in water.

[0083] Preparation of component C: Weigh the formulated amount of zinc powder.

[0084] Take 10kg of component A, 10kg of component B and 2.3kg of component C and mix them.

[0085] Example 4, an anti-rust water-based paint for AGV forklifts, is different from Example 1 in that the wear-resistant filler obtained in Preparation Example 2-1 is replaced with an equal amount of the wear-resistant filler obtained in Preparation Example 2-4.

[0086] Example 5, an anti-rust water-based paint for AGV forklifts, is different from Example 1 in that the wear-resistant filler obtained in Preparation Example 2-1 is replaced with an equal amount of the wear-resistant filler obtained in Preparation Example 2-5.

[0087] Example 6, an anti-rust water-based paint for AGV forklifts, is different from Example 1 in that the wear-resistant filler obtained in Preparation Example 2-1 is replaced with an equal amount of the wear-resistant filler obtained in Preparation Example 2-6. Comparative Example

[0088] Comparative Example 1, an anti-rust water-based paint for AGV forklifts, is different from Example 6 in that the organosilicon-modified epoxy resin obtained in Preparation Example 1-1 is replaced by an equal amount of the organosilicon-modified epoxy resin obtained in Preparation Example 1-4.

[0089] Comparative Example 2, an anti-rust water-based paint for AGV forklifts, is different from Example 6 in that an equal amount of bisphenol F epoxy resin (epoxy equivalent of 165 g / eq) is used to replace the organosilicon-modified epoxy resin obtained in Preparation Example 1-1.

[0090] Comparative Example 3, an anti-rust water-based paint for AGV forklifts, is different from Example 6 in that the bisphenol F epoxy resin (epoxy equivalent is 165 g / eq) is replaced by an equal amount of the organosilicon-modified epoxy resin obtained in Preparation Example 1-1.

[0091] Comparative Example 4, an anti-rust water-based paint for AGV forklifts, differs from Example 6 in that an equal amount of bisphenol A epoxy resin (epoxy equivalent of 500 g / eq) is used to replace bisphenol F epoxy resin (epoxy equivalent of 165 g / eq).

[0092] Performance testing

[0093] Test 1: Low temperature resistance test of paint film

[0094] Prepare the tinplate test plate in accordance with the provisions of GB / T 1731-93 "Determination of paint film flexibility", and then place the test plate in a low temperature environment box, set and maintain the temperature at -20°C for 24 hours to ensure that the temperature of the test plate is uniform and reaches a stable state. Then take out the test plate and wrap it with shaft rods of different radii (wrapping angle is 180°), and the diameter of the shaft rod is from large to small until the test plate cracks, and record the diameter of the smallest shaft rod without cracks. The smaller the minimum shaft rod diameter, the higher the toughness and low temperature resistance of the paint film.

[0095] Test 2: Paint film hardness test

[0096] The test is carried out in accordance with GB / T 6739-2006 “Determination of film hardness of paints and varnishes by pencil method”.

[0097] Test 3: Paint film wear resistance test

[0098] The test was carried out in accordance with the provisions of GB / T 1768-2006 "Determination of the abrasion resistance of paints and varnishes - Rotating rubber grinding wheel method". A Cs-10 rubber grinding wheel was selected, with a 1 kg counterweight. The specified number of revolutions was 2000. Five specimens were taken from each group, and the average mass loss of the specimens was calculated. The test results were accurate to 0.1 mg.

[0099] Test 4: Paint film moisture and heat resistance test

[0100] According to the provisions of GB / T 1740-2007 "Determination of moisture and heat resistance of paint films", the test time (d) when rust appears on the test plate is measured. During the test, it is observed once every 24 hours to characterize the waterproof and anti-rust ability of the paint film.

[0101] Table 1. Test results

[0102]

[0103] Analysis of test results:

[0104] 1. It can be seen from Examples 1 to 6 and Comparative Examples 1 to 4 and Table 1 that the present application adopts a combination of bisphenol A epoxy resin modified by grafting of organosilicon polyether chains and bisphenol F epoxy resin, which can significantly improve the toughness and low-temperature resistance of the paint film, which is manifested in that it is not easy to crack under bending force after being exposed to low temperature.

[0105] 2. Combining Examples 1 to 3 and Examples 4 to 6 with Table 1, it can be seen that, based on the above two epoxy resins, the use of fillers modified by epoxy-containing silane coupling agents and carboxybenzotriazole can effectively compensate for the loss of paint film hardness caused by the introduction of organic silicone resin, thereby obtaining a paint film with excellent flexibility and hardness, and achieving effective improvement in the wear resistance of the paint film. It can also be seen from the test results in Table 1 that the lack of any performance of paint film flexibility and hardness cannot achieve the best wear resistance effect.

[0106] In addition, the introduction of carboxybenzotriazole and the increase in cross-linking density both improve the moisture and heat resistance of the paint film.

[0107] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An anti-rust water-based paint for AGV forklift, characterized in that: The invention comprises component A, component B and component C in a mass ratio of 1:1:0.15-0.25, wherein component A comprises: 100 parts of waterborne epoxy resin, 0.1-0.5 parts of defoaming agent, 1-2 parts of leveling agent, 0.3-1 parts of wetting agent, 1-3 parts of dispersant, 15-30 parts of wear-resistant filler, 1-5 parts of rust inhibitor, 1-2 parts of anti-settling agent, 50-60 parts of deionized water; The B component includes 10 to 15 parts of curing agent and 20 to 30 parts of water, calculated by weight percentage; The C component is zinc powder; The waterborne epoxy resin is prepared by dispersing a main epoxy resin and an organosilicon-modified epoxy resin in an emulsifier solution, wherein the main epoxy resin is a bisphenol F epoxy resin, and the organosilicon-modified epoxy resin is prepared by reacting a bisphenol A epoxy resin, diphenyl dihydroxy silane, and a silane-modified polyether under the catalysis of an organotin catalyst, wherein the mass ratio of the bisphenol A epoxy resin, the diphenyl dihydroxy silane, and the silane-modified polyether is 3 to 5:0.2 to 0.5:1; and the silane-modified polyether is a methoxysilane-terminated polyether; The preparation method of the wear-resistant filler is as follows: adding a spherical filler to an ethanol solution of carboxybenzotriazole, mixing evenly, adding p-toluenesulfonic acid, heating to 65-75°C, reacting for 4-6 hours, cooling down to room temperature, adding an epoxy-containing silane coupling agent, stirring and reacting for 0.5-1 hour, filtering, washing with water, and drying to obtain the wear-resistant filler; the mass ratio of the spherical filler, the epoxy-containing silane coupling agent and the carboxybenzotriazole is 1:0.3-0.5:0.1-0.

3.

2. The water-based paint according to claim 1, characterized in that: The preparation method of the organosilicon-modified epoxy resin is as follows: Dissolve bisphenol A epoxy resin in an organic solvent to obtain a solution with a solid content of 45-60%, then add diphenyl dihydroxysilane, silane-modified polyether and an organic tin catalyst, mix them evenly and add them to a reaction container, introduce nitrogen into the reaction container under stirring conditions, exhaust the air, then heat to 145-165° C., keep the temperature for reaction, exhaust the water produced during the reaction until no water is produced in the system, and cool to room temperature to obtain an organosilicon-modified epoxy resin.

3. The water-based paint according to claim 1, characterized in that: The mass ratio of the main epoxy resin to the silicone-modified epoxy resin is 2 to 4:

1.

4. The water-based paint according to claim 1, characterized in that: The epoxy equivalent of the bisphenol A epoxy resin is 155 to 200 g / eq, and the epoxy equivalent of the bisphenol A epoxy resin is 450 to 600 g / eq.

5. The water-based paint according to claim 1, characterized in that: The organic tin catalyst is dibutyltin dilaurate, and the dosage of the organic tin catalyst is 0.8-1.5% of the total mass of bisphenol A epoxy resin, diphenyl dihydroxy silane and silane-modified polyether.

6. The water-based paint according to claim 1, characterized in that: The spherical filler is selected from one or more of spherical alumina, spherical zirconia, spherical silica and spherical calcium carbonate.

7. The water-based paint according to claim 1, characterized in that: The epoxy-containing silane coupling agent is selected from one or more of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltriethoxysilane, 3-(2,3-epoxypropoxy)propylmethyldimethoxysilane, 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane, 3-(2,3-epoxypropoxy)propyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, and γ-glycidyloxypropyltriethoxysilane.

8. A method for preparing an anti-rust water-based paint for an AGV forklift, characterized in that: The raw material ratio of the water-based paint according to any one of claims 1 to 7 is used, and the following operations are performed: Preparation of component A: Weigh the water, wetting agent, defoamer, leveling agent, and dispersant in the formula and mix them evenly, then add the wear-resistant filler and stir evenly, then add the water-based epoxy resin, rust inhibitor, and anti-settling agent and stir evenly; grind until the slurry fineness is no more than 40 microns, Preparation of component B: Weigh the amount of curing agent in the formula and dissolve it in water; Preparation of component C: weigh the formulated amount of zinc powder; Before use, mix component A, component B and component C according to the proportion.

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