Quick-drying corrosion-resistant waterborne epoxy ester coating and preparation method thereof

Abstract

The invention relates to the technical field of anticorrosive coatings, in particular to a quick-drying corrosion-resistant waterborne epoxy ester coating and a preparation method thereof.Epoxy ester resin is modified, interpenetrating-network-like waterborne epoxy ester resin of epoxy ester resin and acrylic resin is synthesized, the compatibility of the epoxy ester resin and the acrylic resin is improved, and the corrosion resistance of the epoxy ester resin and the acrylic resin is improved; the interpenetrating network type polymer prepared by the preparation method disclosed by the invention is good in compatibility with water-based epoxy ester resin and relatively good in dispersity in water, and after the paint is prepared, the water-based epoxy ester resin and the water-based epoxy ester resin can be uniformly dispersed, so that the water-based epoxy ester resin can be uniformly dispersed, and the water-based epoxy ester resin can be uniformly dispersed in the water-based epoxy ester resin, so that the water-based epoxy ester resin can be uniformly dispersed in the water-based epoxy ester resin. According to the present invention, the coating material preparation process is improved, and the prepared paint has characteristics of good storage stability, good initial water resistance, good nitrolacquer resistance, good impact resistance, good adhesion, rust resistance, cracking resistance and foaming resistance after the paint preparation process is improved, such that the prepared paint has characteristics of good storage stability, good initial water resistance, good nitrolacquer resistance, good impact resistance and good adhesion.

Description

Technical Field

[0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a quick-drying corrosion-resistant water-based epoxy ester coating and a preparation method thereof. Background Art

[0002] Epoxy ester coatings are easy to apply, have good corrosion resistance and are inexpensive. Epoxy esters are obtained by esterifying unsaturated fatty acids or plant oils with epoxy resins. The production process of solvent-based epoxy ester resins and epoxy ester coatings is simple and the raw materials are readily available. However, a large amount of volatile organic solvents will enter the environment during the preparation and use process, affecting human health and environmental safety.

[0003] Making solvent-based epoxy ester coatings water-based is currently the most effective way to reduce VOC. Patent CN 117511320A maintains a relatively low product viscosity of water-based epoxy ester resins to ensure good workability of resin products by synthesizing the distribution and ratio of conjugated epoxy esters and non-conjugated epoxy ester intermediates. However, in the modification of conjugated epoxy ester resins by vinyl monomers, the ring opening fails to be completely esterified, and the hydroxyl content will be too high, which will cause the paint film to easily absorb water in a humid environment. Patent CN 115926565A adds water-based acrylic emulsion to water-based epoxy ester coatings to improve the drying and corrosion resistance of the paint film. However, the addition of acrylic emulsions requires consideration of compatibility issues, and excessive use will lead to a decrease in the salt spray resistance of the paint film.

[0004] At present, water-based epoxy ester coatings still have problems such as slow film drying, poor water and salt spray resistance, poor storage stability, and high VOC content resulting from excessive use of co-solvents. Summary of the invention

[0005] The purpose of the present invention is to provide a quick-drying corrosion-resistant water-based epoxy ester coating having the characteristics of low VOC content, fast paint film drying, good initial water resistance, good salt spray resistance, storage stability and excellent comprehensive performance, and a preparation method thereof.

[0006] A quick-drying, corrosion-resistant water-based epoxy ester coating comprises the following components in parts by weight with a total weight of 100 parts:

[0007]

[0008] The waterborne epoxy ester resin is prepared by the following method:

[0009] 30-45 parts of 604 epoxy resin, 10-18 parts of linoleic acid, 10-25 parts of tung oil acid and 0.03-0.1 parts of monobutyltin oxide are put into a reaction kettle, heated to 180±5°C and kept for 1 hour, then 2-4 parts of xylene are added, heated to 200°C and refluxed for 1 hour, then heated to 215±10°C and refluxed until the acid value is less than 5 mgKOH / g, and then 20-30 parts of propylene glycol methyl ether are added to dilute the mixture to obtain an epoxy ester base resin, wherein the total number of parts by weight of the above components is 100 parts;

[0010] Then, 60-75 parts of epoxy ester base resin and 5-10 parts of versatate epoxy acrylate are added into a reaction kettle, the temperature is raised to (120-130)° C., a mixture of 5-6 parts of methacrylic acid, 1-5 parts of versatate vinyl carbonate, 10-17 parts of methyl methacrylate and 1-2 parts of di-tert-butyl peroxide is added dropwise, the dripping is completed within 2-3 hours, and the temperature is kept for 1 hour, 0.1-0.3 parts of initiator are added, and the temperature is kept for another 1 hour, and 0.1-0.3 parts of initiator are added again, and the temperature is lowered after keeping the temperature for 1 hour to obtain epoxy ester resin, and the above total weight is calculated as 100 parts;

[0011] 55 parts of the modified epoxy ester resin were added to 2.5 parts of N,N-dimethylethanolamine and 42.5 parts of deionized water to neutralize to a pH value of ≥8 to obtain a water-based epoxy ester resin.

[0012] The versatile carbonic acid epoxy acrylate is a functional monomer obtained by the grafting reaction of epoxy resin, acrylate and versatile carbonic acid.

[0013] The interpenetrating network polymer is prepared by the following method:

[0014] 23-26 parts of polyethylene glycol diglycidyl ether, 9-10 parts of maleic anhydride and 0.1-0.2 parts of tetrabutylammonium bromide are put into a reaction kettle, the temperature is raised to 120±5°C, and after reacting for 2 hours, 15-25 parts of 634 epoxy resin are added and the reaction is continued for 2 hours, and then the temperature is lowered to 85±5°C, 25-35 parts of linoleic acid, 0.1-0.2 parts of tert-butyl hydroperoxide / sodium formaldehyde sulfoxylate redox initiator with a mass ratio of 1.3:1 and 10-15 parts of propylene glycol methyl ether are added, and the temperature is lowered to 35±5°C after reacting for 6-8 hours, and 1-5 parts of blocked aliphatic isocyanate solution are added within 0.5-1 hour, the rotation speed is 500-1000r / min, and after keeping warm for 1-2 hours, an interpenetrating network polymer is obtained, and the total amount of the above components is 100 parts.

[0015] Preferably, the polyethylene glycol diglycidyl ether has an epoxide value of 0.35-0.4 at 25 degrees and a viscosity of 40-80 mPa·s;

[0016] Preferably, the blocked aliphatic isocyanate solution has an equivalent weight of 550, a solid content of 60%, and a solvent of DBA;

[0017] Preferably, the dispersant is one or more of BYK-190, BYK-191, and BKY-195;

[0018] Preferably, the defoaming agent is one or both of Digo 810 and Euka 290W;

[0019] Preferably, the leveling agent is one or two of ST-5100 and Digo 760w;

[0020] Preferably, the flash rust preventer is one or more of FA179, WX9192, WX9178, and WX9176;

[0021] Preferably, the drying agent is one or more of zinc isooctanoate, calcium isooctanoate, cobalt isooctanoate, cerium isooctanoate, and lanthanum isooctanoate;

[0022] Preferably, the anti-settling agent is one or two of polyamide wax slurry, fumed silica and bentonite powder;

[0023] Preferably, the pigment is one or more of carbon black, titanium dioxide, red iron oxide, yellow iron oxide, permanent violet and phthalocyanine blue;

[0024] Preferably, the filler is one or more of feldspar powder, silica powder, and barium sulfate;

[0025] The quick-drying, corrosion-resistant water-based epoxy ester coating is prepared by the following method:

[0026] Add water-based epoxy ester resin, interpenetrating network polymer and dispersant into the batching pot, stir at 400-600rpm for 5-10 minutes; then add filler, pigment, defoamer, leveling agent, anti-flash rust agent, anti-settling agent and drying agent in turn, adjust the stirring speed to 1000-1200rpm, stir and disperse for 20-30 minutes, disperse and grind to a fineness of ≤50μm, and finally add deionized water to adjust to the construction viscosity before discharging.

[0027] The core part of the present invention is as follows: First, water-based epoxy ester resin is synthesized and prepared, epoxy ester and tert-butyl epoxy acrylate are used as the matrix, and grafting and copolymerization are performed on them respectively. The synthesized acrylic resin and epoxy ester resin are in a state of quasi-interpenetrating network type, which enhances the compatibility of acrylic resin and epoxy ester resin, and the acrylic resin component improves the drying of the paint film. At the same time, tert-butyl vinyl carbonate is used as a functional monomer to enhance the compatibility with the cosolvent, thereby reducing the amount of cosolvent and reducing the VOC content. The branched structure forms a steric hindrance to protect the ester group from being easily hydrolyzed, improves the storage stability, and further improves the water resistance and chemical resistance of the paint film. Second, an interpenetrating network polymer is synthesized, and polyethylene glycol diglycidyl ether is used to modify it to enhance the hydrophilicity of the polymer, and then it is matched with linoleic acid, maleic anhydride and 634 epoxy resin to form a semi-interpenetrating network structure, and then with a closed aliphatic isocyanate to form an interpenetrating network polymer. After being introduced into waterborne epoxy ester coatings, the urethane bonds in the polymer improve the bonding between the coating and the substrate; and the cross-linked structure in the polymer further enhances the strength and hardness of the paint film. After being added into the coating, through the synergistic effect with the waterborne epoxy ester resin, a tighter and stronger paint film and a cross-linked structure with higher mechanical strength are formed, thereby improving the initial water resistance, salt spray resistance and other comprehensive properties of the paint film.

[0028] 1. The present invention modifies epoxy ester resin and synthesizes a water-based epoxy ester resin of a quasi-interpenetrating network type of epoxy ester resin and acrylic resin, thereby improving the compatibility of the two, enhancing the hydrolysis stability of the resin, and improving the drying and water resistance of the paint film. Functional monomers such as tert-butyl vinyl carbonate are introduced to further reduce the amount of cosolvent used and reduce the VOC content.

[0029] 2. The interpenetrating network polymer prepared by the present invention has good compatibility with waterborne epoxy ester resin and good dispersibility in water. After painting, the storage stability is (50±2)℃ / 30d>6 level, and other comprehensive properties such as initial water resistance and salt spray resistance of the paint film are further improved.

[0030] 3. The present invention improves the coating preparation process, has good storage stability after painting, the surface drying time of the paint film is ≤30min, the actual drying time is ≤8h, the initial water resistance and nitrocellulose lacquer resistance are good, the impact resistance and adhesion are good, the VOC is less than 200g / L, the salt spray resistance is ≥1080h, and it does not rust, crack or blister. DETAILED DESCRIPTION

[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the preferred embodiments.

[0032] Example 1

[0033] A quick-drying, corrosion-resistant water-based epoxy ester coating comprises the following components in parts by weight with a total weight of 100 parts:

[0034]

[0035]

[0036] Wherein, the water-based epoxy ester resin is prepared by the following method:

[0037] 31 parts of 604 epoxy resin, 18 parts of linoleic acid, 25 parts of tung oil acid and 0.05 parts of monobutyl tin oxide were put into a reactor, the temperature was raised to (180±5)°C and kept for 1 hour, then 2.95 parts of xylene were added and the temperature was raised to 200°C and refluxed for 1 hour, then the temperature was raised to (215±10)°C and refluxed until the acid value was less than 5 mgKOH / g, the xylene was removed by vacuum, and 23 parts of propylene glycol methyl ether were added for dilution to obtain a basic epoxy ester resin.

[0038] Then, 60 parts of epoxy ester resin and 10 parts of versatate epoxy acrylate are added into the reaction kettle, the temperature is raised to (120-130)°C, and a mixture of 6 parts of methacrylic acid, 5 parts of versatate vinyl ester, 17 parts of methyl methacrylate and 1.5 parts of di-tert-butyl peroxide are added dropwise within (2-3) hours, and the mixture is kept warm for 1 hour. After adding 0.25 parts of initiator and keeping warm for another hour, 0.25 parts of initiator are added again, and after keeping warm for 1 hour, the temperature is lowered and the material is discharged to obtain the modified epoxy ester resin.

[0039] 55 parts of the modified epoxy ester resin were added into 2.5 parts of N,N-dimethylethanolamine and 42.5 parts of deionized water to neutralize to a pH value of ≥8 to obtain an aqueous epoxy ester resin with a solid content of >45%.

[0040] The interpenetrating network polymer is prepared by the following method:

[0041] 26 parts of polyethylene glycol diglycidyl ether, 10 parts of maleic anhydride and 0.2 parts of tetrabutylammonium bromide were put into a reaction kettle, heated to (120±5)°C, reacted for 2 hours, then 25.3 parts of 634 epoxy resin were added and the reaction was continued for 2 hours, then the temperature was lowered to (85±5)°C, 27.3 parts of linoleic acid, 0.2 parts of tert-butyl hydroperoxide / sodium formaldehyde sulfoxylate redox initiator and 10 parts of propylene glycol methyl ether were added, reacted for (6-8) hours, then the temperature was lowered to (35±5)°C, 1 part of blocked aliphatic isocyanate solution was added after 0.6 hours, the rotation speed was 500-1000r / min, and after keeping warm for (1-2) hours, an interpenetrating network polymer was obtained.

[0042] The quick-drying, corrosion-resistant water-based epoxy ester coating described above is prepared by the following method: 55 parts of water-based epoxy resin and 10 parts of interpenetrating network polymer, 0.3 parts of BYK-190 dispersant, 0.3 parts of Digo 810 defoamer, 0.1 parts of Digo 760w leveling agent, 0.5 parts of WX9192 anti-flash rust agent, 0.3 parts of zinc isooctanoate drier, 0.5 parts of polyamide wax slurry anti-settling agent, 0.5 parts of carbon black, 10 parts of titanium dioxide and 17.5 parts of barium sulfate are added into a mixing pot, dispersed and ground to a fineness of ≤50 μm, and 5 parts of deionized water are added to adjust to the construction viscosity before discharging.

[0043] Example 2

[0044] A quick-drying, corrosion-resistant water-based epoxy ester coating comprises the following components in parts by weight with a total weight of 100 parts:

[0045]

[0046] Wherein, the water-based epoxy ester resin is prepared by the following method:

[0047] 31 parts of 604 epoxy resin, 18 parts of linoleic acid, 25 parts of tung oil acid and 0.05 parts of monobutyl tin oxide were put into a reactor, the temperature was raised to (180±5)°C and kept for 1 hour, then 2.95 parts of xylene were added and the temperature was raised to 200°C and refluxed for 1 hour, then the temperature was raised to (215±10)°C and refluxed until the acid value was less than 5 mgKOH / g, the xylene was removed by vacuum, and 23 parts of propylene glycol methyl ether were added for dilution to obtain a basic epoxy ester resin.

[0048] Then, 60 parts of epoxy ester resin and 10 parts of versatate epoxy acrylate are added into the reaction kettle, the temperature is raised to (120-130)°C, and a mixture of 6 parts of methacrylic acid, 5 parts of versatate vinyl ester, 17 parts of methyl methacrylate and 1.5 parts of di-tert-butyl peroxide are added dropwise within (2-3) hours, and the mixture is kept warm for 1 hour. After adding 0.25 parts of initiator and keeping warm for another hour, 0.25 parts of initiator are added again, and after keeping warm for 1 hour, the temperature is lowered and the material is discharged to obtain the modified epoxy ester resin.

[0049] 55 parts of the modified epoxy ester resin were added into 2.5 parts of N,N-dimethylethanolamine and 42.5 parts of deionized water to neutralize to a pH value of ≥8 to obtain an aqueous epoxy ester resin with a solid content of >45%.

[0050] The interpenetrating network polymer is prepared by the following method:

[0051] 26 parts of polyethylene glycol diglycidyl ether, 10 parts of maleic anhydride and 0.2 parts of tetrabutylammonium bromide were put into a reaction kettle, heated to (120±5)°C, reacted for 2 hours, then 25.3 parts of 634 epoxy resin were added and the reaction was continued for 2 hours, then the temperature was lowered to (85±5)°C, 27.3 parts of linoleic acid, 0.2 parts of tert-butyl hydroperoxide / sodium formaldehyde sulfoxylate redox initiator and 10 parts of propylene glycol methyl ether were added, reacted for (6-8) hours, then the temperature was lowered to (35±5)°C, 1 part of blocked aliphatic isocyanate solution was added after 0.6 hours, the rotation speed was 500-1000r / min, and after keeping warm for (1-2) hours, an interpenetrating network polymer was obtained.

[0052] The quick-drying, corrosion-resistant water-based epoxy ester coating described above is prepared by the following method: 65 parts of water-based epoxy resin and 5 parts of interpenetrating network polymer, 0.3 parts of BYK-191 dispersant, 0.3 parts of Euka 290w defoamer, 0.1 parts of ST-5100 leveling agent, 0.5 parts of FA179 anti-flash rust agent, 0.3 parts of zinc isooctanoate drier, 0.5 parts of polyamide wax slurry anti-settling agent, 0.5 parts of permanent violet, 10 parts of titanium dioxide and 14.5 parts of silicon micropowder are added into a mixing pot, dispersed and ground to a fineness of ≤50 μm, and 3 parts of deionized water are added to adjust to the construction viscosity before discharging.

[0053] Example 3

[0054] A quick-drying, corrosion-resistant water-based epoxy ester coating comprises the following components in parts by weight with a total weight of 100 parts:

[0055]

[0056] Wherein, the water-based epoxy ester resin is prepared by the following method:

[0057] 45 parts of 604 epoxy resin, 10 parts of linoleic acid, 15 parts of tung oil acid and 0.1 parts of monobutyl tin oxide were put into a reactor, heated to (180±5)°C and kept warm for 1 hour, then 2.90 parts of xylene were added and heated to 200°C and refluxed for 1 hour, then heated to (215±10)°C and refluxed until the acid value was less than 5 mgKOH / g, the xylene was removed by vacuum, and then 27 parts of propylene glycol methyl ether were added for dilution to obtain an epoxy ester base resin.

[0058] Then, 75 parts of epoxy ester resin and 5 parts of versatate epoxy acrylate are added into the reaction kettle, the temperature is raised to (120-130)°C, and a mixture of 5 parts of methacrylic acid, 3 parts of versatate vinyl ester, 10 parts of methyl methacrylate and 1.5 parts of di-tert-butyl peroxide are added dropwise within (2-3) hours, and the mixture is kept warm for 1 hour. After adding 0.25 parts of initiator and keeping warm for another hour, 0.25 parts of initiator are added again, and after keeping warm for 1 hour, the temperature is lowered and the material is discharged to obtain the modified epoxy ester resin.

[0059] 55 parts of the modified epoxy ester resin were added to 2.5 parts of N,N-dimethylethanolamine and 42.5 parts of deionized water to neutralize to a pH value of ≥8 to obtain an aqueous epoxy ester resin with a solid content of >45%.

[0060] The interpenetrating network polymer is prepared by the following method:

[0061] 23 parts of polyethylene glycol diglycidyl ether, 10 parts of maleic anhydride and 0.2 parts of tetrabutylammonium bromide were put into a reaction kettle, heated to (120±5)°C, reacted for 2 hours, 15 parts of 634 epoxy resin were added and the reaction was continued for 2 hours, then the temperature was lowered to (85±5)°C, 35 parts of linoleic acid, 0.2 parts of tert-butyl hydroperoxide / sodium formaldehyde sulfoxylate redox initiator and 11.6 parts of propylene glycol methyl ether were added, reacted for (6-8) hours, then the temperature was lowered to (35±5)°C, 5 parts of blocked aliphatic isocyanate solution were added after 0.6 hours, the rotation speed was 500-1000r / min, and after keeping warm for (1-2) hours, an interpenetrating network polymer was obtained.

[0062] The quick-drying, corrosion-resistant water-based epoxy ester coating described above is prepared by the following method: 55 parts of water-based epoxy resin and 10 parts of interpenetrating network polymer, 0.3 parts of BYK-190 dispersant, 0.3 parts of Digo 810 defoamer, 0.1 parts of Digo 760w leveling agent, 0.5 parts of WX9192 anti-flash rust agent, 0.3 parts of zinc isooctanoate drier, 0.5 parts of polyamide wax slurry anti-settling agent, 0.5 parts of carbon black, 10 parts of titanium dioxide and 17.5 parts of barium sulfate are added into a mixing pot, dispersed and ground to a fineness of ≤50 μm, and 5 parts of deionized water are added to adjust to the construction viscosity before discharging.

[0063] Example 4

[0064] A quick-drying, corrosion-resistant water-based epoxy ester coating comprises the following components in parts by weight with a total weight of 100 parts:

[0065]

[0066]

[0067] Wherein, the water-based epoxy ester resin is prepared by the following method:

[0068] 45 parts of 604 epoxy resin, 10 parts of linoleic acid, 15 parts of tung oil acid and 0.1 parts of monobutyl tin oxide were put into a reactor, heated to (180±5)°C and kept warm for 1 hour, then 2.90 parts of xylene were added and heated to 200°C and refluxed for 1 hour, then heated to (215±10)°C and refluxed until the acid value was less than 5 mgKOH / g, the xylene was removed by vacuum, and then 27 parts of propylene glycol methyl ether were added for dilution to obtain an epoxy ester base resin.

[0069] Then, 75 parts of epoxy ester resin and 5 parts of versatate epoxy acrylate are added into the reaction kettle, the temperature is raised to (120-130)°C, and a mixture of 5 parts of methacrylic acid, 3 parts of versatate vinyl ester, 10 parts of methyl methacrylate and 1.5 parts of di-tert-butyl peroxide are added dropwise within (2-3) hours, and the mixture is kept warm for 1 hour. After adding 0.25 parts of initiator and keeping warm for another hour, 0.25 parts of initiator are added again, and after keeping warm for 1 hour, the temperature is lowered and the material is discharged to obtain the modified epoxy ester resin.

[0070] 55 parts of the modified epoxy ester resin were added into 2.5 parts of N,N-dimethylethanolamine and 42.5 parts of deionized water to neutralize to a pH value of ≥8 to obtain an aqueous epoxy ester resin with a solid content of >45%.

[0071] The interpenetrating network polymer is prepared by the following method:

[0072] 23 parts of polyethylene glycol diglycidyl ether, 10 parts of maleic anhydride and 0.2 parts of tetrabutylammonium bromide were put into a reaction kettle, heated to (120±5)°C, reacted for 2 hours, 15 parts of 634 epoxy resin were added and the reaction was continued for 2 hours, then the temperature was lowered to (85±5)°C, 35 parts of linoleic acid, 0.2 parts of tert-butyl hydroperoxide / sodium formaldehyde sulfoxylate redox initiator and 11.6 parts of propylene glycol methyl ether were added, reacted for (6-8) hours, then the temperature was lowered to (35±5)°C, 5 parts of blocked aliphatic isocyanate solution were added after 0.6 hours, the rotation speed was 500-1000r / min, and after keeping warm for (1-2) hours, an interpenetrating network polymer was obtained.

[0073] The quick-drying, corrosion-resistant water-based epoxy ester coating described above is prepared by the following method: 65 parts of water-based epoxy resin and 5 parts of interpenetrating network polymer, 0.3 parts of BYK-191 dispersant, 0.3 parts of Euka 290w defoamer, 0.1 parts of ST-5100 leveling agent, 0.5 parts of FA179 anti-flash rust agent, 0.3 parts of zinc isooctanoate drier, 0.5 parts of polyamide wax slurry anti-settling agent, 0.5 parts of permanent violet, 10 parts of titanium dioxide and 14.5 parts of silicon micropowder are added into a mixing pot, dispersed and ground to a fineness of ≤50 μm, and 3 parts of deionized water are added to adjust to the construction viscosity before discharging.

[0074] The test result indicators are compared as follows.

[0075]

[0076]

Claims

1. A quick-drying, corrosion-resistant water-based epoxy ester coating, characterized in that: The composition includes the following components in parts by weight and the total weight is 100 parts:

2. A quick-drying, corrosion-resistant water-based epoxy ester coating according to claim 1, characterized in that: The waterborne epoxy ester resin is prepared by the following method: 30-45 parts of 604 epoxy resin, 10-18 parts of linoleic acid, 10-25 parts of tung oil acid and 0.03-0.1 parts of monobutyltin oxide are put into a reaction kettle, heated to 180±5°C and kept for 1 hour, then 2-4 parts of xylene are added, heated to 200°C and refluxed for 1 hour, then heated to 215±10°C and refluxed until the acid value is less than 5 mgKOH / g, and then 20-30 parts of propylene glycol methyl ether are added to dilute the mixture to obtain an epoxy ester base resin, wherein the total number of parts by weight of the above components is 100 parts; Then, 60-75 parts of epoxy ester base resin and 5-10 parts of versatate epoxy acrylate are added into a reaction kettle, the temperature is raised to (120-130)° C., a mixture of 5-6 parts of methacrylic acid, 1-5 parts of versatate vinyl carbonate, 10-17 parts of methyl methacrylate and 1-2 parts of di-tert-butyl peroxide is added dropwise, the dripping is completed within 2-3 hours, and the temperature is kept for 1 hour, 0.1-0.3 parts of initiator are added, and the temperature is kept for another 1 hour, and 0.1-0.3 parts of initiator are added again, and the temperature is lowered after keeping the temperature for 1 hour to obtain epoxy ester resin, and the above total weight is calculated as 100 parts; 55 parts of the modified epoxy ester resin were added to 2.5 parts of N,N-dimethylethanolamine and 42.5 parts of deionized water to neutralize to a pH value of ≥8 to obtain a water-based epoxy ester resin.

3. A quick-drying, corrosion-resistant water-based epoxy ester coating according to claim 2, characterized in that: The versatile carbonic acid epoxy acrylate is a functional monomer obtained by the grafting reaction of epoxy resin, acrylate and versatile carbonic acid.

4. A quick-drying, corrosion-resistant water-based epoxy ester coating according to claim 1, characterized in that: The interpenetrating network polymer is prepared by the following method: 23-26 parts of polyethylene glycol diglycidyl ether, 9-10 parts of maleic anhydride and 0.1-0.2 parts of tetrabutylammonium bromide are put into a reaction kettle, the temperature is raised to 120±5°C, and after reacting for 2 hours, 15-25 parts of 634 epoxy resin are added and the reaction is continued for 2 hours, and then the temperature is lowered to 85±5°C, 25-35 parts of linoleic acid, 0.1-0.2 parts of tert-butyl hydroperoxide / sodium formaldehyde sulfoxylate redox initiator with a mass ratio of 1.3:1 and 10-15 parts of propylene glycol methyl ether are added, and the temperature is lowered to 35±5°C after reacting for 6-8 hours, and 1-5 parts of blocked aliphatic isocyanate solution are added within 0.5-1 hour, the rotation speed is 500-1000r / min, and after keeping warm for 1-2 hours, an interpenetrating network polymer is obtained, and the total amount of the above components is 100 parts.

5. A quick-drying, corrosion-resistant water-based epoxy ester coating according to claim 4, characterized in that: The epoxy value of the polyethylene glycol diglycidyl ether at 25 degrees is 0.35-0.4, and the viscosity is 40-80 mPa·s.

6. A quick-drying, corrosion-resistant water-based epoxy ester coating according to claim 4, characterized in that: The equivalent weight of the blocked aliphatic isocyanate solution is 550, the solid content is 60%, and the solvent is DBA.

7. The quick-drying, corrosion-resistant water-based epoxy ester coating according to claim 1, characterized in that: The dispersant is one or more of BYK-190, BYK-191, and BKY-195, the defoamer is one or two of Digo 810 and Euka 290W, the leveling agent is one or two of ST-5100 and Digo 760w, the anti-flash rust agent is one or more of FA179, WX9192, WX9178, and WX9176, the drying agent is one or more of zinc isooctanoate, calcium isooctanoate, cobalt isooctanoate, cerium isooctanoate, and lanthanum isooctanoate, the anti-settling agent is one or two of polyamide wax slurry, fumed silica, and bentonite powder, the pigment is one or more of carbon black, titanium dioxide, red iron oxide, yellow iron oxide, permanent violet, and phthalocyanine blue, and the filler is one or more of feldspar powder, silica powder, and barium sulfate.

8. The method for preparing the above-mentioned quick-drying corrosion-resistant water-based epoxy ester coating is characterized by: Add water-based epoxy ester resin, interpenetrating network polymer and dispersant into the batching pot, stir at 400-600rpm for 5-10 minutes; then add filler, pigment, defoamer, leveling agent, anti-flash rust agent, anti-settling agent and drying agent in turn, adjust the stirring speed to 1000-1200rpm, stir and disperse for 20-30 minutes, disperse and grind to a fineness of ≤50μm, and finally add deionized water to adjust to the construction viscosity before discharging.

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