High-stain-resistance epoxy wall coating and preparation method thereof

Abstract

The present application relates to a kind of high stain resistance epoxy wall coating, including A component and B component, the A component includes by mass fraction: modified epoxy emulsion 20-30 parts, pigment and filler 35-45 parts, auxiliary agent 3.21-7.83 parts, water 25-31 parts;Wherein, the modified epoxy emulsion is mainly by epoxy resin E51 and fluorine silicon modified non-ionic epoxy emulsifier is made by phase inversion method;The B component includes water-based epoxy curing agent.The present application is emulsified to epoxy resin E51 using independently synthesized fluorine silicon modified non-ionic epoxy emulsifier, and it is made into modified epoxy emulsion using phase inversion method, as the main film-forming material of A component.Fluorine silicon modified non-ionic epoxy emulsifier can reduce the surface energy of coating film due to the silicon and fluorine groups in its structure, so that the stain resistance of coating film is good;At the same time, due to the epoxy groups in its structure, it has good compatibility with epoxy resin E51, and can react with B component to form a film, so that the fluorine and silicon groups can be retained in the coating for a long time, and play a role in stain resistance and durability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coating technology, in particular to a high-stain-resistant water-based epoxy wall coating and a preparation method thereof. BACKGROUND

[0002] For small B-end engineering projects and special places such as industrial plants, subways, schools, and hospitals, the performance indicators of coatings such as hardness, chemical resistance, and stain resistance need to have higher requirements. Traditional acrylic coatings form a film by physical entanglement of latex particles, and the structure is not dense enough to meet the requirements of high hardness and stain resistance. The film-forming mechanism of water-based epoxy coatings is different, and the film-forming process has both physical and chemical processes. After crosslinking reaction, the intermolecular interaction is tight, and the paint film is more dense, which can be better applied to the above-mentioned special places. However, due to the presence of hydrophilic groups, the coating film formed by water-based epoxy coatings has high surface free energy, and its stain resistance is still limited, making it difficult for water-based epoxy coatings to be widely promoted.

[0003] The current common ways to improve the stain resistance of coatings include:

[0004] (1) Using two-component reactive coatings to improve the density of the paint film, such as Chinese patent CN113913083A discloses a stain-resistant and scrub-resistant epoxy interior wall coating and a preparation method thereof, which improves the density of the paint film by using commercially available epoxy emulsion and curing agent, and gives the paint film certain stain resistance, but this method has limited improvement on stain resistance;

[0005] (2) Using organosilicon to reduce the surface energy of the coating film, such as Chinese patent CN113831812A discloses an environmentally friendly anti-scratch easy-to-clean interior wall coating and a preparation method thereof, which introduces a stain-resistant promoter (such as polyether-modified hydroxyl-containing polydimethylsiloxane), which can migrate to the surface of the coating film after drying, reducing the surface energy to improve the stain resistance of the coating film, but this method has the problem of poor stain resistance durability. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a high-stain-resistant water-based epoxy wall coating and a preparation method thereof. The coating uses component A as the main paint, which uses modified epoxy emulsion as the main film-forming material, and component B as the curing agent. After crosslinking and curing, it can give the paint film high and durable stain resistance, effectively solving the harsh requirements of high-stain-resistant environments such as hospitals, schools, and subway stations.

[0007] To solve the above technical problems, the technical solution adopted by the present application is:

[0008] The application provides a high-stain water-resistant epoxy wall coating, which comprises an A component and a B component.

[0009] The modified epoxy emulsion 20-30 parts, the pigment and filler 35-45 parts, the auxiliary agent 3.21-7.83 parts, and water 25-31 parts.

[0010] The modified epoxy emulsion is mainly prepared from epoxy resin E51 and a fluorosilicon modified non-ionic epoxy emulsifier by phase inversion.

[0011] The B component comprises a water-based epoxy curing agent.

[0012] The application discloses a high-stain water-resistant epoxy wall coating, which is prepared from epoxy resin E51 and a fluorosilicon modified non-ionic epoxy emulsifier by phase inversion, and the fluorosilicon modified non-ionic epoxy emulsifier is used as a main film-forming material of the A component. On one hand, the fluorosilicon modified non-ionic epoxy emulsifier contains silicon and fluorine groups, and the silicon and fluorine groups can migrate to the surface of the coating film during the process of two-component curing and film-forming, so that the surface energy of the coating film is greatly reduced, and stains are difficult to adhere to the surface of the coating film, thereby achieving excellent stain resistance and hydrophobic effect. On the other hand, the fluorosilicon modified non-ionic epoxy emulsifier contains epoxy groups, which ensures good compatibility with the epoxy resin E51, thereby improving the stability of the modified epoxy emulsion, and the excess epoxy groups can also react with the B component to participate in the process of two-component curing and film-forming, so that the fluorine and silicon groups can be retained in the coating film for a long time, thereby overcoming the problem that the traditional stain resistance accelerator cannot resist stains for a long time. In addition, the two-component setting is adopted in the application, and the curing and film-forming principle is a physical process and a chemical reaction, so that a more compact coating film can be formed compared with ordinary single-component polymer latex coating, and the immersion of stains into the coating film is further blocked, and the stain resistance is also improved.

[0013] Optionally, the preparation method of the modified epoxy emulsion comprises the following steps: epoxy resin E51 and a fluorosilicon modified non-ionic epoxy emulsifier are added into a reaction kettle at a mass ratio of 5:1, heated to 60 DEG C, deionized water is added drop by drop, and high-speed stirring is performed until a milky white uniform emulsion is formed.

[0014] Optionally, the solid content of the modified epoxy emulsion is 55%, and the epoxy equivalent weight is 550±20.

[0015] Optionally, the fluorosilicon modified non-ionic epoxy emulsifier is prepared by reacting epoxy resin E51, polytrifluoropropylhydroxysiloxane and polyether amine at a mass ratio of 32:10-15:53-58.

[0016] According to the above description, the fluorosilicon modified non-ionic epoxy emulsifier of the application is prepared by ring-opening reaction of epoxy resin E51, polytrifluoropropylhydroxylsiloxane and polyether amine. The introduced polyether segment has hydrophilicity, and can form amphiphilic polymer segment with hydrophilicity and lipophilicity after reaction with epoxy resin E51. The retention of epoxy group makes the prepared fluorosilicon modified non-ionic epoxy emulsifier have excellent emulsifying performance, and can perform phase inversion emulsification of epoxy resin E51 to form modified epoxy resin emulsion. The introduced polytrifluoropropylhydroxylsiloxane has the advantages of organic silicon and organic fluorine compound, and has Si-O chain as main chain and fluorine-containing group introduced on the side chain. The Si-O bond has high bond energy and low bond rotation energy barrier. The fluorine atom has small radius, high electronegativity, low polarizability, short carbon-fluorine bond length and high bond energy, and has low surface energy, thereby well improving the stain resistance of the coating film.

[0017] Optionally, the reaction temperature is 140 DEG C, and the reaction time is 5-5.5 h.

[0018] Optionally, the pigment and filler are at least two of rutile titanium dioxide, talc and superfine barium sulfate.

[0019] According to the above description, the talc and superfine barium sulfate are preferably used as the filler. The talc is composed of layers of magnesium silicate, and is connected by weak van der Waals force between each layer to form a layered structure. After being wrapped and wound by the epoxy resin polymer chain, the diffusion path of the surface stain in the paint film is prolonged, so that the stain is more easily wiped off. The superfine barium sulfate has small particle size and narrow particle size distribution, can reduce the roughness of the coating film, make the paint film more flat and dense, and effectively improve the stain resistance of the paint film.

[0020] Optionally, the auxiliary agent includes, by mass fraction:

[0021] The thickening agent is 0.5-1 part, the pH adjusting agent is 0.01-0.03 part, the dispersing agent is 1-2 parts, the wetting agent is 0.1-0.3 part, the defoaming agent is 0.5-2 parts, the bactericidal preservative is 0.1-0.5 part, and the film forming aid is 1-2 parts.

[0022] Optionally, the thickening agent is bentonite or cellulose ether.

[0023] The pH adjusting agent is AMP-95.

[0024] The dispersing agent is a high molecular weight block copolymer solution containing pigment affinity groups.

[0025] The wetting agent is a polyether modified siloxane solution.

[0026] The defoaming agent is a mineral oil type defoaming agent and / or a silicone type defoaming agent.

[0027] The bactericidal and preservative agent is a mixture of zinc pyrithione and 2-octyl-3(2H)-isothiazolidinone;

[0028] The film-forming aid is dodecyl alcohol ester and / or dipropylene glycol ethyl ether.

[0029] Another aspect of the present invention provides a method for preparing the above-mentioned highly wastewater resistant epoxy wall coating, comprising the following steps:

[0030] S1. Preparation of modified epoxy emulsion;

[0031] S2. Weigh each raw material in component A according to the proportion, stir evenly, and obtain component A;

[0032] S3. When using, mix components A and B evenly to obtain the final product. Detailed Implementation

[0033] The present invention will be described in detail below with reference to embodiments, and the advantages and features of the present invention will become clearer with the description. However, the embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details of the technical solutions of the present invention without departing from the spirit and scope of the present invention, but such modifications and substitutions all fall within the protection scope of the present invention.

[0034] This invention provides a highly wastewater-resistant epoxy wall coating, comprising component A and component B, wherein component A comprises, by weight:

[0035] 20-30 parts modified epoxy emulsion, 35-45 parts pigments and fillers, 3.21-7.83 parts additives, and 25-31 parts water;

[0036] The modified epoxy emulsion is mainly prepared by epoxy resin E51 and fluorosilicone modified nonionic epoxy emulsifier through a phase inversion method.

[0037] Component B includes an aqueous epoxy curing agent.

[0038] In some preferred embodiments of the present invention, the waterborne epoxy curing agent is BANCO 937 (active hydrogen equivalent: 300, solid content: 50±2%) and / or BANCO 903 (active hydrogen equivalent: 285, solid content: 50±2%).

[0039] The preparation method of the modified epoxy emulsion specifically includes the following steps: epoxy resin E51 and fluorosilicone modified nonionic epoxy emulsifier are added to the reaction vessel at a mass ratio of 5:1, the temperature is raised to 60°C, deionized water is added dropwise, and the mixture is stirred at high speed until a milky white homogeneous emulsion is formed, which is the final product.

[0040] The solid content of the modified epoxy emulsion is 55%, and the epoxy equivalent is 550±20.

[0041] The fluorosilicon modified non-ionic epoxy emulsifier is prepared by reacting epoxy resin E51, polytrifluoropropylhydroxylsiloxane and polyether amine in a mass ratio of 32:10-15:53-58.

[0042] The reaction temperature is 140℃, and the reaction time is 5-5.5h.

[0043] The color filler includes at least two of rutile titanium dioxide, talcum powder and superfine barium sulfate.

[0044] The auxiliary agent includes, by mass fraction:

[0045] The thickening agent is 0.5-1 part, the pH adjusting agent is 0.01-0.03 part, the dispersing agent is 1-2 parts, the wetting agent is 0.1-0.3 part, the defoaming agent is 0.5-2 parts, the bactericidal preservative is 0.1-0.5 part, and the film forming auxiliary agent is 1-2 parts.

[0046] The thickening agent is bentonite or cellulose ether;

[0047] The pH adjusting agent is AMP-95;

[0048] The dispersing agent is a high molecular weight block copolymer solution containing a pigment affinity group;

[0049] The wetting agent is a polyether modified siloxane solution;

[0050] The defoaming agent is a mineral oil type defoaming agent and / or an organic silicon type defoaming agent;

[0051] The bactericidal preservative is a mixture of zinc pyrithione and 2-octyl-3(2H)-isothiazolone;

[0052] The film forming auxiliary agent is dodecanol ester and / or dipropylene glycol ethyl ether.

[0053] It is prepared by the following method, including the following steps:

[0054] S1, preparing a modified epoxy emulsion.

[0055] S2, weighing each raw material in the A component according to the proportion, stirring uniformly, and preparing the A component.

[0056] S3, when used, stirring the A component and the B component uniformly, and obtaining.

[0057] In some preferred embodiments of the present application, step S2 specifically includes the following steps:

[0058] S21, deionized water is placed in the reaction kettle, then the thickening agent and pH regulator are added at a speed of 300 rpm, the speed is increased to 1500 rpm, stirring until uniformly dispersed, then the speed is reduced to 600 rpm, the dispersant, wetting agent, bactericidal preservative and defoaming agent are added;

[0059] S22, the speed is increased to 1500 rpm, the color filler is added, and the stirring is continued for 20 min until the fineness of the powder reaches below 50 μm;

[0060] S23, the speed is reduced to 600 rpm, the modified epoxy emulsion and film-forming aid are added, stirring for 10 min, discharging, and the product is obtained.

[0061] Example 1

[0062] A high-stain-resistant epoxy wall coating, comprising A component and B component, the A component comprising, by mass fraction:

[0063] modified epoxy emulsion 27.5 parts, color filler 40 parts (20 parts of rutile titanium dioxide, 10 parts of talc and 10 parts of superfine barium sulfate), auxiliary agent 5.57 parts, water 26.93 parts;

[0064] The modified epoxy emulsion is mainly prepared by phase inversion method from epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier, which specifically comprises the following steps: epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier are added to the reaction kettle at a mass ratio of 5:1, heated to 60℃, deionized water is added dropwise, and high-speed stirring is carried out until a milky white uniform emulsion is formed, which is the modified epoxy emulsion with a solid content of 55% and an epoxy equivalent weight of 570.

[0065] The fluorosilicon modified non-ionic epoxy emulsifier is prepared from epoxy resin E51, polytrifluoropropylhydroxysiloxane and polyether amine at a mass ratio of 32:10:58, heated to 140℃, and reacted for 5h.

[0066] The auxiliary agent comprises, by mass fraction:

[0067] thickening agent 0.75 parts, pH regulator 0.02 parts, dispersant 1.5 parts, wetting agent 0.2 parts, defoaming agent 1.25 parts, bactericidal preservative 0.35 parts, film-forming aid 1.5 parts.

[0068] The thickening agent is bentonite or cellulose ether;

[0069] The pH regulator is AMP-95;

[0070] The dispersant is a high molecular weight block copolymer solution containing pigment affinity groups;

[0071] The wetting agent is a polyether modified siloxane solution;

[0072] The defoaming agent is a mineral oil-based defoaming agent and / or a silicone-based defoaming agent;

[0073] The bacteriostatic preservative is a mixture of zinc pyrithione and 2-octyl-3(2H)- isothiazolone;

[0074] The film-forming aid is dodecanol ester and / or dipropylene glycol ethyl ether.

[0075] The B component comprises an aqueous epoxy curing agent (Liangu Chemical BANCO 937, active hydrogen equivalent: 300, solid content: 50±2%).

[0076] It is prepared by the following method comprising the following steps:

[0077] S1, preparing a modified epoxy emulsion.

[0078] S2, weighing each raw material in the A component according to the proportion, stirring uniformly, and preparing the A component;

[0079] Specifically comprising the following steps:

[0080] S21, placing deionized water in a reaction kettle, then adding a thickening agent and a pH adjuster at a rotation speed of 300 rpm, increasing the rotation speed to 1500 rpm, stirring until uniformly dispersed, then reducing the rotation speed to 600 rpm, adding a dispersing agent, a wetting agent, a bacteriostatic preservative, and a defoaming agent;

[0081] S22, increasing the rotation speed to 1500 rpm, adding pigments and fillers, and continuously stirring for 20 min until the fineness of the powder reaches below 50 μm;

[0082] S23, reducing the rotation speed to 600 rpm, adding a modified epoxy emulsion and a film-forming aid, stirring for 10 min, discharging, and obtaining the A component.

[0083] S3, when used, stirring the A component and the B component uniformly according to a mass ratio of 7:1, and obtaining the product.

[0084] Example 2

[0085] A high-stain-resistance epoxy wall coating, comprising an A component and a B component, the A component comprising, by mass fraction:

[0086] 30 parts of a modified epoxy emulsion, 35 parts of pigments and fillers (15 parts of rutile titanium dioxide and 20 parts of talc), 4.73 parts of an aid, and 30.27 parts of water;

[0087] The modified epoxy emulsion is mainly prepared by phase inversion method from epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier, and specifically includes the following steps: epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier are added into a reaction kettle at a mass ratio of 5:1, heated to 60℃, deionized water is added drop by drop, and high-speed stirring is performed until a milky white uniform emulsion is formed, thereby obtaining a modified epoxy emulsion with a solid content of 55% and an epoxy equivalent of 550.

[0088] The fluorosilicon modified non-ionic epoxy emulsifier is prepared from epoxy resin E51, polytrifluoropropylhydroxysiloxane and polyether amine at a mass ratio of 32:13:55, heated to 140℃, and reacted for 5h.

[0089] The auxiliary agent includes, by mass fraction:

[0090] Thickening agent 1 part, pH regulator 0.03 part, dispersant 1 part, wetting agent 0.1 part, defoaming agent 0.5 part, bactericidal preservative 0.1 part, film-forming aid 2 parts.

[0091] The B component includes a water-based epoxy curing agent (Liangu Chemical BANCO 903, active hydrogen equivalent: 285, solid content: 50±2%).

[0092] The preparation method of the high-stain-resistant water-based epoxy wall coating of the embodiment is the same as that of Example 1, except that the mass ratio of the A component to the B component is 6:1.

[0093] Example 3

[0094] A high-stain-resistant water-based epoxy wall coating includes an A component and a B component, and the A component includes, by mass fraction:

[0095] Modified epoxy emulsion 20 parts, pigment and filler 45 parts (rutile titanium dioxide 13 parts, talc 18 parts and superfine barium sulfate 14 parts), auxiliary agent 6.31 parts, water 28.69 parts;

[0096] The modified epoxy emulsion is mainly prepared by phase inversion method from epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier, and specifically includes the following steps: epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier are added into a reaction kettle at a mass ratio of 5:1, heated to 60℃, deionized water is added drop by drop, and high-speed stirring is performed until a milky white uniform emulsion is formed, thereby obtaining a modified epoxy emulsion with a solid content of 55% and an epoxy equivalent of 530.

[0097] The fluorosilicon modified non-ionic epoxy emulsifier is prepared from epoxy resin E51, polytrifluoropropylhydroxysiloxane and polyether amine at a mass ratio of 32:15:53, heated to 140℃, and reacted for 5h.

[0098] The auxiliary agent includes, by mass fraction:

[0099] thickening agent 0.5 parts, pH regulator 0.01 parts, dispersant 2 parts, wetting agent 0.3 parts, defoaming agent 2 parts, bactericidal preservative 0.5 parts, film forming aid 1 part.

[0100] The B component includes a water-based epoxy curing agent (Lian fixed chemistry BANCO 937, active hydrogen equivalent: 300, solid content: 50±2%).

[0101] The preparation method of the high-stain-resistant water-based epoxy wall coating of the present embodiment is the same as that of Example 1, except that the mass ratio of the A component to the B component is 9:1.

[0102] Example 4

[0103] A high-stain-resistant water-based epoxy wall coating includes an A component and a B component, the A component includes, by mass parts:

[0104] modified epoxy emulsion 28 parts, pigment and filler 38 parts (rutile titanium dioxide 18 parts, ultra-fine barium sulfate 20 parts), auxiliary agent 6.27 parts, water 27.73 parts;

[0105] The modified epoxy emulsion is mainly prepared by phase inversion method from epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier, which specifically includes the following steps: epoxy resin E51 and fluorosilicon modified non-ionic epoxy emulsifier are added to the reaction kettle in a mass ratio of 5:1, heated to 60℃, deionized water is added dropwise, and high-speed stirring is carried out until a milky white uniform emulsion is formed, i.e. the modified epoxy emulsion with a solid content of 55% and an epoxy equivalent of 550.

[0106] The fluorosilicon modified non-ionic epoxy emulsifier is prepared from epoxy resin E51, polytrifluoropropylhydroxysiloxane and polyether amine in a mass ratio of 32:12:56, heated to 140℃, and reacted for 5h.

[0107] The auxiliary agent includes, by mass parts:

[0108] thickening agent 0.8 parts, pH regulator 0.02 parts, dispersant 1.75 parts, wetting agent 0.2 parts, defoaming agent 1.5 parts, bactericidal preservative 0.3 parts, film forming aid 1.7 parts.

[0109] The B component includes a water-based epoxy curing agent (Lian fixed chemistry BANCO 903, active hydrogen equivalent: 285, solid content: 50±2%).

[0110] The preparation method of the high-stain-resistant water-based epoxy wall coating of the present embodiment is the same as that of Example 1.

[0111] Comparative Example 1

[0112] The main difference between the present comparative example and example 1 is that the commercially available ordinary waterborne epoxy emulsion (solid content 75%, epoxy equivalent weight 250-290, non-ionic) is used to replace the modified epoxy emulsion in the A component in an equal amount, and the mass ratio of the A component to the B component is 3.5:1.

[0113] The coatings prepared in examples 1-4 and comparative example 1 are subjected to performance tests according to the standard HG / T 4756-2014 "Interior wall stain-resistant latex paint", and the results are recorded in Table 1.

[0114] Table 1 Performance test results

[0115]

[0116]

[0117] From the results in Table 1, it can be seen that the modified epoxy emulsion prepared by phase inversion method using epoxy resin E51 and the self-designed fluorosilicon modified non-ionic epoxy emulsifier is used in the A component of examples 1-4, which is prepared by using pigments, fillers, additives, etc. The stain resistance score of the paint film obtained by curing and crosslinking of the A component and the B component is as high as 90 points or more, and the stain resistance durability score is as high as 70 points or more, which is significantly better than the comparative example 1 using ordinary waterborne epoxy emulsion. The present application not only can efficiently prepare two-component high stain-resistant waterborne epoxy wall coating, but also is green and environmentally friendly, which meets the high requirements of people for healthy and green living environment.

[0118] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A high water-stain resistant epoxy wall coating, comprising an A component and a B component, the A component comprising, by mass fraction: 20-30 parts of a modified epoxy emulsion, 35-45 parts of a pigment filler, 3.21-7.83 parts of an additive, and 25-31 parts of water; wherein the modified epoxy emulsion is mainly prepared by phase inversion from epoxy resin E51 and a fluorosilicon-modified non-ionic epoxy emulsifier; the fluorosilicon-modified non-ionic epoxy emulsifier is prepared by reacting epoxy resin E51, polytrifluoropropylhydroxysiloxane, and polyether amine at a mass ratio of 32:10-15:53-58; and the B component comprises a water-based epoxy curing agent. 2.The high water-stain resistant epoxy wall coating of claim 1, wherein the preparation method of the modified epoxy emulsion comprises the following steps: adding epoxy resin E51 and the fluorosilicon-modified non-ionic epoxy emulsifier at a mass ratio of 5:1 into a reaction kettle, heating to 60℃, adding deionized water drop by drop, and stirring at high speed until a milky white uniform emulsion is formed. wherein 3.The high water-stain resistant epoxy wall coating of claim 1 or 2, wherein the modified epoxy emulsion has a solid content of 55% and an epoxy equivalent weight of 550±20. 4.The high water-stain resistant epoxy wall coating of any one of claims 1-3, wherein the reaction temperature for preparing the fluorosilicon-modified non-ionic epoxy emulsifier is 140℃, and the reaction time is 5-5.5h. 5.The high water-stain resistant epoxy wall coating of any one of claims 1-4, wherein the pigment filler comprises at least two of rutile titanium dioxide, talc, and ultra-fine barium sulfate.

2. The high stain resistant epoxy wall coating of claim 1, wherein, 6.The high water-stain resistant epoxy wall coating of any one of claims 1-5, wherein the additive comprises, by mass fraction: 0.5-1 parts of a thickening agent, 0.01-0.03 parts of a pH adjuster, 1-2 parts of a dispersant, 0.1-0.3 parts of a wetting agent, 0.5-2 parts of an antifoaming agent, 0.1-0.5 parts of a bactericidal preservative, and 1-2 parts of a film-forming aid.

3. The high stain resistant epoxy wall coating of claim 2, wherein, 7.The high water-stain resistant epoxy wall coating of claim 6, wherein the thickening agent is bentonite or a cellulose ether; the pH adjuster is AMP-95; the dispersant is a high-molecular-weight block copolymer solution containing a pigment affinity group; the wetting agent is a polyether-modified siloxane solution; the antifoaming agent is a mineral oil-based antifoaming agent and / or a silicone-based antifoaming agent; the bactericidal preservative is a mixture of zinc pyrithione and 2-octyl-3(2H)-isothiazolone; and the film-forming aid is dodecanol ester and / or dipropylene glycol ethyl ether.

4. The high stain resistant waterborne epoxy wall coating of claim 1, wherein, 8.A preparation method of the high water-stain resistant epoxy wall coating of claim 1, comprising the following steps: S1, preparing a modified epoxy emulsion; S2, weighing each raw material in the A component according to the proportion, stirring uniformly, and preparing the A component; and S3, stirring the A component and the B component uniformly when used.

5. The high stain resistant waterborne epoxy wall coating as claimed in claim 1, wherein, ​ 6. The high stain resistant waterborne epoxy wall coating as claimed in claim 1, wherein, ​ ​ 7. The high stain resistant epoxy wall coating as claimed in claim 6, wherein, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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