A flexible epoxy asphalt corrosion-resistant coating and its preparation and application

Abstract

The present invention belongs to the field of concrete corrosion-resistant protective materials, and discloses a flexible epoxy asphalt corrosion-resistant coating and its preparation and application. The coating comprises component 1 and component 2; component 1 comprises emulsified asphalt, polymer emulsion and asphalt-containing curing agent; optionally, it also comprises at least one of filler, wetting dispersant, thickener and defoamer; component 2 comprises epoxy resin; optionally, it also comprises diluent. The present invention forms a cross-linked structure through a ring-opening reaction between the epoxy group in the curing agent and the polymer emulsion and emulsified asphalt, thereby improving the flexibility and corrosion resistance of the epoxy asphalt coating.

Description

Technical Field

[0001] The invention belongs to the field of concrete corrosion-resistant protective materials, and more specifically, relates to a flexible epoxy asphalt corrosion-resistant coating and its preparation and application. Background Art

[0002] Epoxy resin is a reliable corrosion-resistant protective material with thermosetting properties. It is rigid in application and will crack under impact, shrinkage, corrosion and other conditions, resulting in flakes falling off. The impact resistance and flexibility of epoxy resin can be improved by toughening, but the material cost is significantly increased, and the application field is limited. It is not suitable for the field of concrete corrosion protection. The price of epoxy asphalt corrosion-resistant coating is lower than that of epoxy coating. Through formula adjustment, it can have a certain degree of flexibility at room temperature, but it is still a rigid material, and the problems of cracking and falling off cannot be effectively solved. According to the characteristics of the application field, the field of concrete corrosion protection requires cost-effective and flexible epoxy materials. On the premise of ensuring corrosion resistance, it needs to have a certain flexibility at room temperature and low temperature.

[0003] Therefore, it is urgent to propose a flexible epoxy asphalt corrosion-resistant coating and its preparation and application. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and to propose a flexible epoxy asphalt corrosion-resistant coating and its preparation and application. The present invention forms a cross-linked structure through a ring-opening reaction between the epoxy groups in the curing agent and the polymer emulsion and the emulsified asphalt, thereby improving the flexibility and corrosion resistance of the epoxy asphalt coating.

[0005] In order to achieve the above-mentioned object, the first aspect of the present invention provides a flexible epoxy asphalt corrosion-resistant coating, which comprises component 1 and component 2;

[0006] The component 1 includes emulsified asphalt, polymer emulsion and asphalt-containing curing agent; optionally, it also includes at least one of a filler, a wetting and dispersing agent, a thickener and a defoaming agent;

[0007] The component 2 comprises epoxy resin; optionally, further comprises a diluent.

[0008] In the present invention, as a preferred embodiment, the component 1 includes emulsified asphalt, polymer emulsion and asphalt-containing curing agent; and the component 2 includes epoxy resin.

[0009] In the present invention, as a preferred embodiment, the component 1 includes emulsified asphalt, polymer emulsion, asphalt-containing curing agent and filler; the component 2 includes epoxy resin and diluent.

[0010] In the present invention, as a preferred embodiment, the component 1 includes emulsified asphalt, polymer emulsion, asphalt-containing curing agent, filler, wetting dispersant, thickener and defoamer; and the component 2 includes epoxy resin and diluent.

[0011] According to the present invention, preferably, based on the total weight of the component 1, the content of emulsified asphalt is 20-70%, the content of polymer emulsion is 5-50%, the content of asphalt-containing curing agent is 10-50%, the content of filler is 0-50%, the content of wetting and dispersing agent is 0-3%, the content of thickener is 0-3%, and the content of defoaming agent is 0-3%; preferably, based on the total weight of the component 1, the content of emulsified asphalt is 20-70%, the content of polymer emulsion is 5-50%, the content of asphalt-containing curing agent is 10-50%, the content of filler is 5-30%, the content of wetting and dispersing agent is 0.1-3%, the content of thickener is 0.1-3%, and the content of defoaming agent is 0.1-3%;

[0012] Based on the total weight of the component 2, the content of the epoxy resin is 50-100%, and the content of the diluent is 0-50%; preferably, based on the total weight of the component 2, the content of the epoxy resin is 50-95%, and the content of the diluent is 5-50%.

[0013] According to the present invention, preferably, the mass ratio of component 1 to component 2 is 10:(1-5).

[0014] According to the present invention, preferably, the polymer emulsion is at least one of acrylic emulsion, vinyl acetate-ethylene copolymer emulsion, styrene-butadiene rubber emulsion, chloroprene rubber emulsion and nitrile rubber emulsion.

[0015] According to the present invention, preferably, the filler is at least one of barium sulfate, titanium dioxide, quartz powder, mica powder, talc powder and bentonite.

[0016] According to the present invention, preferably, the wetting and dispersing agent is at least one of a polycarboxylate sodium salt type wetting and dispersing agent, a polyacrylic acid sodium salt type wetting and dispersing agent and a nonionic surfactant type wetting and dispersing agent.

[0017] According to the present invention, preferably, the thickener is at least one of a cellulose ether thickener, an associative thickener and an alkali swelling thickener.

[0018] According to the present invention, preferably, the defoamer is at least one of a mineral oil defoamer, a polyether defoamer and a silicone defoamer.

[0019] According to the present invention, preferably, the epoxy resin is at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, aliphatic glycidyl ether epoxy resin and glycidyl ester epoxy resin.

[0020] According to the present invention, preferably, the diluent is a reactive diluent and / or a non-reactive diluent; preferably, the diluent is at least one of xylene, n-butanol, benzyl alcohol, alkyl glycidyl ether and aryl glycidyl ether.

[0021] According to the present invention, preferably, the asphalt-containing curing agent is prepared by addition and ring-opening reactions of epoxy resin, ethyl triphenylphosphine acetate, ethylene glycol monopropyl ether, asphalt and an organic amine compound under a nitrogen atmosphere.

[0022] According to the present invention, preferably, in the asphalt-containing curing agent, the mass of ethyl triphenylphosphine acetate is 0.1-5% of the mass of the epoxy resin, the mass of ethylene glycol monopropyl ether is 10-70% of the mass of the epoxy resin, the mass of asphalt is 1-10% of the mass of the epoxy resin, and the mass of the organic amine compound is 5-50% of the mass of the epoxy resin;

[0023] The epoxy resin is at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, aliphatic glycidyl ether epoxy resin and glycidyl ester epoxy resin.

[0024] According to the present invention, preferably, the preparation method of the asphalt-containing curing agent comprises the following steps:

[0025] S1: Under a nitrogen atmosphere, epoxy resin and ethyl triphenylphosphine acetate are uniformly mixed to obtain a mixture;

[0026] S2: uniformly mixing the mixture with ethylene glycol monopropyl ether and asphalt and reacting them to obtain a reactant;

[0027] S3: uniformly mixing the reactants and the organic amine compound and reacting them to obtain the asphalt-containing curing agent.

[0028] According to the present invention, preferably, in step S1, the temperature for uniformly mixing the epoxy resin and ethyl triphenylphosphine acetate is 70-180°C, the stirring time is 0.5-1h, and the stirring speed is 100-300rpm. Preferably, in step S1, under a nitrogen atmosphere, the epoxy resin is stirred and the temperature is slowly raised to 70-90°C, and the ethyl triphenylphosphine acetate solution is slowly added dropwise to the epoxy resin, the temperature is raised to 130-180°C, and stirring is continued for 0.5-1h to obtain a mixture.

[0029] According to the present invention, preferably, in step S2, the conditions for uniform mixing and reacting include a temperature of 130-180° C., a stirring time of 1-3 h, and a stirring speed of 100-300 rpm.

[0030] According to the present invention, preferably, in step S3, the conditions for uniform mixing and reacting include a temperature of 70-90° C., a stirring time of 0.5-2 h, and a stirring speed of 100-300 rpm.

[0031] The second aspect of the present invention provides a method for preparing the flexible epoxy asphalt corrosion-resistant coating, the preparation method comprising the following steps:

[0032] L1: Obtain component 1:

[0033] Under a nitrogen atmosphere, the emulsified asphalt and the polymer emulsion are uniformly mixed;

[0034] Add asphalt-containing curing agent and mix evenly;

[0035] Optionally, at least one of a wetting and dispersing agent, a defoaming agent, a filler and a thickener is added and uniformly mixed to obtain component 1;

[0036] L2: Obtain component 2:

[0037] The epoxy resin and an optional diluent are mixed and stirred to obtain component 2.

[0038] According to the present invention, preferably, the conditions for uniformly mixing the emulsified asphalt and the polymer emulsion include: a temperature of 30-50° C. and a stirring speed of 100-300 rpm.

[0039] According to the present invention, preferably, the conditions for uniform mixing after adding the asphalt-containing curing agent include: temperature of 50-70°C, time of 0.5-2h, and stirring speed of 100-300rpm.

[0040] In the present invention, as a preferred embodiment, the preparation method of the flexible epoxy asphalt corrosion-resistant coating comprises the following steps:

[0041] L1: Obtain component 1:

[0042] Under nitrogen atmosphere, the emulsified asphalt and polymer emulsion are uniformly mixed, and the temperature is raised to 30-50°C under stirring at a stirring speed of 100-300 rpm;

[0043] Slowly add the asphalt curing agent, raise the temperature to 50-70℃ after adding, and continue stirring for 0.5-2h at a stirring speed of 100-300rpm;

[0044] Stop heating and add wetting dispersant and defoamer while stirring at a speed of 100-300 rpm;

[0045] Increase the stirring speed to 400-1000rpm, slowly add filler, and stir for 20-40min;

[0046] Slowly add thickener and stir for 20-40 minutes at a stirring speed of 400-1000 rpm to obtain component 1;

[0047] L2: Obtain component 2:

[0048] The epoxy resin and the optional diluent are mixed and stirred uniformly at a stirring speed of 100-300 rpm to obtain component 2.

[0049] The third aspect of the present invention provides the application of the flexible epoxy asphalt corrosion-resistant coating in the field of concrete corrosion protection.

[0050] The beneficial effects of the technical solution of the present invention are as follows:

[0051] The present invention prepares a self-made asphalt-containing curing agent through addition and ring-opening reactions, so that the curing agent contains epoxy groups. The epoxy groups in the curing agent react with the polymer emulsion and the emulsified asphalt to form a cross-linked structure through ring-opening reactions, thereby improving the flexibility and corrosion resistance of the epoxy asphalt coating.

[0052] The flexible epoxy asphalt corrosion-resistant coating prepared in the present invention is a water-based environmentally friendly coating, which can be bent from room temperature to low temperature. The present invention changes the properties of epoxy thermosetting materials and can be applied to fields such as concrete corrosion protection to avoid problems such as cracks and flaking, and has better corrosion protection performance.

[0053] Other features and advantages of the present invention will be described in detail in the following detailed description. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0055] The components in the following embodiments and comparative examples can all be obtained commercially.

[0056] Example 1

[0057] This embodiment provides an asphalt-containing curing agent, and the preparation method thereof includes:

[0058] S1: In a nitrogen atmosphere, 100 g of bisphenol A epoxy resin was added to a sealed mixing tank equipped with a condensing device, the temperature was slowly raised to 80° C. under stirring at 100 rpm, and 3 g of ethyl triphenylphosphine acetate solution was slowly added dropwise; the temperature was raised to 170° C., and stirring was continued for 0.5 h to react and obtain a mixture;

[0059] S2: Slowly add 60 g of ethylene glycol monopropyl ether to the mixture, and after the addition is complete, add 6 g of asphalt, continue stirring for 1.5 hours, and react to obtain a reactant;

[0060] S3: Cooling to 80° C., slowly dropping 35 g of an organic amine compound into the reactant, and after the dropping is completed, continuously stirring for 1 hour to react, thereby obtaining the asphalt-containing curing agent.

[0061] This embodiment uses the above-mentioned asphalt-containing curing agent to prepare a flexible epoxy asphalt corrosion-resistant coating, including the following steps:

[0062] L1: Under nitrogen atmosphere, 180 g of emulsified asphalt, 15 g of styrene-butadiene rubber emulsion and 15 g of chloroprene rubber emulsion were mixed and heated to 40°C with stirring at 200 rpm;

[0063] Slowly add 60g of asphalt curing agent, raise the temperature to 60℃ after adding, and continue stirring for 1h;

[0064] Stop heating, add 0.6 g of polyacrylic acid sodium salt wetting and dispersing agent and 0.6 g of silicone defoaming agent under stirring;

[0065] Increase the stirring speed to 700 rpm, slowly add 20 g of mica powder and 10 g of barium sulfate, and stir for 20 min;

[0066] Slowly add 1.5 g of alkali swellable thickener and stir for 20 min to obtain component 1;

[0067] L2: Mix 15 g of bisphenol A epoxy resin and 15 g of aryl glycidyl ether and stir them evenly to obtain component 2.

[0068] When the flexible epoxy asphalt corrosion-resistant coating of this embodiment is used, component 1 and component 2 are mixed in a mass ratio of 10:3 and then applied on the surface of the concrete base.

[0069] Example 2

[0070] This embodiment provides an asphalt-containing curing agent, and the preparation method thereof includes:

[0071] S1: In a nitrogen atmosphere, 100 g of polyphenol type glycidyl ether epoxy resin was added to a sealed mixing tank equipped with a condensing device, the temperature was slowly raised to 70° C. under stirring at 200 rpm, and 0.3 g of ethyl triphenylphosphine acetate solution was slowly added dropwise; the temperature was raised to 140° C., and stirring was continued for 1 h to react to obtain a mixture;

[0072] S2: Slowly add 15 g of ethylene glycol monopropyl ether to the mixture, and after the addition is complete, add 2 g of asphalt, continue stirring for 1 hour, and react to obtain a reactant;

[0073] S3: Cooling to 70° C., slowly dropping 10 g of an organic amine compound into the reactant, and after the dropping is completed, continuously stirring for 2 h to react, thereby obtaining the asphalt-containing curing agent.

[0074] This embodiment uses the above-mentioned asphalt-containing curing agent to prepare a flexible epoxy asphalt corrosion-resistant coating, including the following steps:

[0075] L1: Under nitrogen atmosphere, 90 g of emulsified asphalt, 50 g of acrylic emulsion and 10 g of vinyl acetate-ethylene copolymer emulsion were mixed and heated to 50°C with stirring at 100 rpm;

[0076] Slowly add 120g of asphalt curing agent, raise the temperature to 70℃ after adding, and continue stirring for 0.5h;

[0077] Stop heating, add 0.3 g of sodium polyacrylate wetting and dispersing agent and 0.9 g of silicone defoaming agent under stirring;

[0078] Increase the stirring speed to 800 rpm, slowly add 25 g of quartz powder and 5 g of talcum powder, and stir for 30 min;

[0079] Slowly add 2.5 g of associative thickener and 0.5 g of cellulose ether thickener, and stir for 40 min to obtain component 1;

[0080] L2: 15 g of polyphenol type glycidyl ether epoxy resin and 5 g of alkyl glycidyl ether were mixed and stirred uniformly to obtain component 2.

[0081] When the flexible epoxy asphalt corrosion-resistant coating of this embodiment is used, component 1 and component 2 are mixed in a mass ratio of 10:2 and then applied on the surface of the concrete base.

[0082] Example 3

[0083] This embodiment provides an asphalt-containing curing agent, and the preparation method thereof includes:

[0084] S1: In a nitrogen atmosphere, add 60 g of aliphatic glycidyl ether epoxy resin and 40 g of glycidyl ester epoxy resin to a sealed mixing tank equipped with a condensing device, slowly raise the temperature to 80° C. under stirring at 250 rpm, slowly dropwise add 4.8 g of ethyl triphenylphosphine acetate solution; raise the temperature to 170° C., continue stirring for 0.5 h, react, and obtain a mixture;

[0085] S2: slowly add 30 g of ethylene glycol monopropyl ether to the mixture, and after the addition is complete, add 8 g of asphalt, continue stirring for 1.5 hours, and react to obtain a reactant;

[0086] S3: Cooling to 85° C., slowly dropping 46 g of an organic amine compound into the reactant, and after the dropping is completed, continuously stirring for 1 hour to react, thereby obtaining the asphalt-containing curing agent.

[0087] This embodiment uses the above-mentioned asphalt-containing curing agent to prepare a flexible epoxy asphalt corrosion-resistant coating, including the following steps:

[0088] L1: Under nitrogen atmosphere, 105 g of emulsified asphalt, 20 g of styrene-butadiene rubber emulsion and 40 g of nitrile rubber emulsion were mixed and heated to 45°C with stirring at 250 rpm;

[0089] Slowly add 45g of asphalt curing agent, raise the temperature to 55℃ after adding, and continue stirring for 2h;

[0090] Stop heating, add 4g of nonionic surfactant wetting and dispersing agent, 2g of sodium polyacrylate wetting and dispersing agent and 6g of mineral oil defoaming agent under stirring;

[0091] Increase the stirring speed to 900 rpm, slowly add 70 g of titanium dioxide and 20 g of talcum powder, and stir for 20 min;

[0092] Slowly add 3 g of alkali swellable thickener and 3 g of associative thickener, stir for 30 min, and obtain component 1;

[0093] L2: 5 g of aliphatic glycidyl ether epoxy resin, 4 glycidyl ester epoxy resin and 1 g of benzyl alcohol were mixed and stirred uniformly to obtain component 2.

[0094] When the flexible epoxy asphalt corrosion-resistant coating of this embodiment is used, component 1 and component 2 are mixed in a mass ratio of 10:1 and then applied on the surface of the concrete base.

[0095] Comparative Example 1

[0096] This comparative example provides a curing agent, which differs from Example 1 only in that:

[0097] No asphalt is added in step S2.

[0098] The method for preparing epoxy asphalt corrosion-resistant coating using the curing agent of this comparative example is the same as that of Example 1.

[0099] When using the epoxy asphalt corrosion-resistant coating of this comparative example, the same as in Example 1, component 1 and component 2 are mixed in a mass ratio of 10:3, and then coated on the surface of the concrete base.

[0100] Comparative Example 2

[0101] This comparative example provides a curing agent, which differs from Example 1 only in that:

[0102] No asphalt is added in step S2.

[0103] The method for preparing epoxy asphalt corrosion-resistant coating using the curing agent of this comparative example comprises the following steps:

[0104] L1: At room temperature, stir 180g of emulsified asphalt, 15g of styrene-butadiene rubber emulsion, 15g of chloroprene rubber emulsion and 60g of curing agent at a stirring speed of 200rpm;

[0105] Add 0.6 g of polyacrylic acid sodium salt wetting and dispersing agent and 0.6 g of silicone defoaming agent;

[0106] Increase the stirring speed to 700 rpm, slowly add 20 g of mica powder and 10 g of barium sulfate, and stir for 20 min;

[0107] Slowly add 1.5 g of alkali swellable thickener and stir for 20 min to obtain component 1;

[0108] L2: Mix 15 g of bisphenol A epoxy resin and 15 g of aryl glycidyl ether and stir them evenly to obtain component 2.

[0109] When the epoxy asphalt corrosion-resistant coating of this comparative example is used, component 1 and component 2 are mixed in a mass ratio of 10:3, and then applied on the surface of the concrete base.

[0110] Comparative Example 3

[0111] This comparative example provides an epoxy asphalt corrosion-resistant coating, comprising the following steps:

[0112] L1: At room temperature, 180 g of emulsified asphalt, 15 g of styrene-butadiene rubber emulsion, 15 g of chloroprene rubber emulsion and 60 g of organic amine curing agent were stirred and mixed at 200 rpm;

[0113] Add 0.6 g of polyacrylic acid sodium salt wetting and dispersing agent and 0.6 g of silicone defoaming agent;

[0114] Increase the stirring speed to 700 rpm, slowly add 20 g of mica powder and 10 g of barium sulfate, and stir for 20 min;

[0115] Slowly add 1.5 g of alkali swellable thickener and stir for 20 min to obtain component 1;

[0116] L2: Mix 15 g of bisphenol A epoxy resin and 15 g of aryl glycidyl ether and stir them evenly to obtain component 2.

[0117] When the epoxy asphalt corrosion-resistant coating of this comparative example is used, component 1 and component 2 are mixed in a mass ratio of 10:3, and then applied on the surface of the concrete base.

[0118] The organic amine curing agent used in this comparative example is commercially available.

[0119] Test Case

[0120] This test example tests the epoxy asphalt corrosion resistant coatings of Examples 1-3 and Comparative Examples 1-3, including:

[0121] According to the standard "Test Methods for Building Waterproof Coatings GB / T 16777-2008", the tensile properties (tensile strength and elongation at break) and low temperature flexibility are tested;

[0122] The salt water resistance and salt spray resistance tests were carried out in accordance with the standard "Epoxy Asphalt Anti-corrosion Coating GB / T 27806-2011".

[0123] The results are shown in Table 1.

[0124] Table 1

[0125]

[0126]

[0127] As shown in Table 1, compared with Comparative Examples 1-3, the epoxy asphalt corrosion-resistant coating obtained in Examples 1-3 has good flexibility, high elongation at break, can be bent at low temperature, and has better salt water resistance and salt spray resistance. Although Comparative Examples 1-3 use the same emulsified asphalt, polymer emulsion, filler, wetting dispersant, thickener and defoamer, asphalt is not used to participate in the reaction during the preparation of the curing agent, or a commercially available organic amine curing agent is used, so the effect consistent with the present invention cannot be obtained.

[0128] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A flexible epoxy asphalt corrosion-resistant coating, characterized in that: The coating comprises component 1 and component 2; The component 1 includes emulsified asphalt, polymer emulsion and asphalt-containing curing agent; optionally, it also includes at least one of a filler, a wetting and dispersing agent, a thickener and a defoaming agent; The polymer emulsion is at least one of acrylic emulsion, vinyl acetate-ethylene copolymer emulsion, styrene-butadiene rubber emulsion, chloroprene rubber emulsion and nitrile rubber emulsion; The component 2 comprises an epoxy resin; optionally, further comprises a diluent; The preparation method of the asphalt-containing curing agent comprises the following steps: S1: Under a nitrogen atmosphere, epoxy resin and ethyl triphenylphosphine acetate are uniformly mixed to obtain a mixture; S2: uniformly mixing the mixture with ethylene glycol monopropyl ether and asphalt and reacting them to obtain a reactant; S3: uniformly mixing the reactant and the organic amine compound and reacting them to obtain the asphalt-containing curing agent; In the asphalt-containing curing agent, the mass of ethyl triphenylphosphine acetate is 0.1-5% of the mass of the epoxy resin, the mass of ethylene glycol monopropyl ether is 10-70% of the mass of the epoxy resin, the mass of asphalt is 1-10% of the mass of the epoxy resin, and the mass of the organic amine compound is 5-50% of the mass of the epoxy resin; The epoxy resin is at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, aliphatic glycidyl ether epoxy resin and glycidyl ester epoxy resin; In step S1, the epoxy resin and ethyl triphenylphosphine acetate are uniformly mixed at a temperature of 70-180° C., a stirring time of 0.5-1 h, and a stirring speed of 100-300 rpm; In step S2, the conditions for uniform mixing and reaction include a temperature of 130-180° C., a stirring time of 1-3 h, and a stirring speed of 100-300 rpm; In step S3, the conditions for uniform mixing and reaction include a temperature of 70-90° C., a stirring time of 0.5-2 h, and a stirring speed of 100-300 rpm.

2. The flexible epoxy asphalt corrosion resistant coating according to claim 1, wherein: Based on the total weight of the component 1, the content of emulsified asphalt is 20-70%, the content of polymer emulsion is 5-50%, the content of asphalt curing agent is 10-50%, the content of filler is 0-50%, the content of wetting and dispersing agent is 0-3%, the content of thickener is 0-3%, and the content of defoaming agent is 0-3%; Based on the total weight of the component 2, the content of the epoxy resin is 50-100%, and the content of the diluent is 0-50%.

3. The flexible epoxy asphalt corrosion resistant coating according to claim 2, wherein: Based on the total weight of the component 1, the content of emulsified asphalt is 20-70%, the content of polymer emulsion is 5-50%, the content of asphalt curing agent is 10-50%, the content of filler is 5-30%, the content of wetting and dispersing agent is 0.1-3%, the content of thickener is 0.1-3%, and the content of defoaming agent is 0.1-3%.

4. The flexible epoxy asphalt corrosion resistant coating according to claim 2, wherein: Based on the total weight of the component 2, the content of the epoxy resin is 50-95%, and the content of the diluent is 5-50%.

5. The flexible epoxy asphalt corrosion resistant coating according to claim 1 or 2, wherein: The mass ratio of component 1 to component 2 is 10:(1-5).

6. The flexible epoxy asphalt corrosion resistant coating according to claim 1 or 2, wherein: The filler is at least one of barium sulfate, titanium dioxide, quartz powder, mica powder, talc powder and bentonite; The wetting and dispersing agent is at least one of a polycarboxylic acid sodium salt type wetting and dispersing agent, a polyacrylic acid sodium salt type wetting and dispersing agent and a non-ionic surfactant type wetting and dispersing agent; The thickener is at least one of a cellulose ether thickener, an associative thickener and an alkali swelling thickener; The defoamer is at least one of a mineral oil defoamer, a polyether defoamer and a silicone defoamer; The diluent is a reactive diluent and / or a non-reactive diluent.

7. The flexible epoxy asphalt corrosion resistant coating according to claim 6, wherein: The diluent is at least one of xylene, n-butanol, benzyl alcohol, alkyl glycidyl ether and aryl glycidyl ether.

8. The method for preparing the flexible epoxy asphalt corrosion resistant coating according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: L1: Obtain component 1: Under a nitrogen atmosphere, the emulsified asphalt and the polymer emulsion are uniformly mixed; Add asphalt-containing curing agent and mix evenly; Optionally, at least one of a wetting and dispersing agent, a defoaming agent, a filler and a thickener is added and uniformly mixed to obtain component 1; L2: Obtain component 2: The epoxy resin and an optional diluent are mixed and stirred to obtain component 2.

9. The method for preparing the flexible epoxy asphalt corrosion resistant coating according to claim 8, wherein: The conditions for uniformly mixing the emulsified asphalt and the polymer emulsion include: a temperature of 30-50°C and a stirring speed of 100-300 rpm; The conditions for uniform mixing after adding the asphalt curing agent include: temperature of 50-70°C, time of 0.5-2h, and stirring speed of 100-300rpm.

10. Application of the flexible epoxy asphalt corrosion-resistant coating according to any one of claims 1 to 7 in the field of concrete corrosion protection.

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