Epoxy anticorrosive material and preparation method thereof

Abstract

The present invention belongs to the field of coating technology, and specifically relates to an epoxy anticorrosive material and a preparation method thereof. The epoxy anticorrosive material is composed of component A and component B: component A is made of the following raw materials in parts by mass: 60-65 parts of epoxy resin I, 10-15 parts of zinc powder, 5-10 parts of talcum powder, and 3-5 parts of curing agent; component B is made of the following raw materials in parts by mass: 75-80 parts of epoxy resin I I, 4-5 parts of 2,2,6,6-tetramethylpiperidinol, 1-1.5 parts of light stabilizer M, 0.5-0.75 parts of light stabilizer N, 5-7 parts of acetone, 3-5 parts of curing agent, and 1-2 parts of photothermal conversion agent. The epoxy anticorrosive material prepared by the present invention can effectively improve the aging resistance and corrosion resistance of the coated material, thereby extending the service life of the coated material.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and in particular relates to an epoxy anticorrosive material and a preparation method thereof. Background Art

[0002] Materials such as coatings are prone to adverse reactions such as aging and degradation under the multiple effects of light, heat, oxygen, etc., which affect the normal use of the materials. Light stabilizers are a class of compounds that can intervene in the physical and chemical process of light-induced degradation of polymer materials. They are also the most commonly used and effective polymer material additives that can delay the aging process.

[0003] The commonly used light stabilizers are hindered amine light stabilizers, which mainly capture free radicals and decompose photooxidants to prevent the degradation of molecular chains, and can significantly improve the material's anti-photooxidation ability and stabilization effect. Low molecular weight hindered amine light stabilizers have good compatibility with polymers, but have high mobility and are easy to volatilize, which affects the light stability of the material; therefore, the research on the macromolecularization of hindered amine light stabilizers is increasing.

[0004] The Chinese patent application document with publication number CN106589237A discloses a composite macromolecular light stabilizer based on Diels-Alder click chemistry and its preparation method. The patent uses 3-(N,N-2-maleimidopropionic acid ethyl ester-aminomethyl)-2,4-dihydroxybenzophenone and difurfuryl sebacate as raw monomers to undergo Diels-Alder reaction, and then adds 2,2,6,6-tetramethylpiperidinol maleimidopropionate as a capping agent to prepare a composite macromolecular light stabilizer. The macromolecular light stabilizer has dual light stabilizer effects of ultraviolet absorption and free radical capture, and has good compatibility with most polymer materials.

[0005] However, the mobility of hindered amine light stabilizers with higher molecular weight is lower, so that the light stabilizers cannot migrate to the surface of the coated material in time to replenish the lost light stabilizers. Therefore, the amount of hindered amine light stabilizers with higher molecular weight added to the material is generally larger, which increases the material cost. Summary of the invention

[0006] The existing low molecular weight hindered amine light stabilizers are easy to volatilize and have large losses; the high molecular weight hindered amine light stabilizers are added in large amounts; in order to solve this problem, the present invention provides a preparation method of an epoxy anticorrosive material and an anticorrosive material, which can reduce the loss of the hindered amine light stabilizer and reduce its addition amount.

[0007] In order to achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a method for preparing an epoxy anticorrosive material, wherein the epoxy anticorrosive material is composed of component A and component B, and the epoxy anticorrosive material comprises the following preparation steps:

[0009] Step (1): uniformly mixing zinc powder, talcum powder, epoxy resin I and curing agent to obtain component A;

[0010] Step (2): uniformly mixing light stabilizer M, light stabilizer N, 2,2,6,6-tetramethylpiperidinol, acetone, epoxy resin II and a photothermal conversion agent to obtain component B;

[0011] The light stabilizer M is mainly prepared by reacting 2,2,6,6-tetramethylpiperidinol with methyl tert-butyl acetate, and the light stabilizer N is mainly prepared by reacting 2,2,6,6-tetramethylpiperidinol with methyl p-tert-butylbenzoate.

[0012] Preferably, in step (1), the epoxy resin I is a phenolic epoxy resin; more preferably, the epoxy resin I is a phenolic epoxy resin F-44.

[0013] Preferably, in step (2), the epoxy resin II is epoxy resin E-44; and the photothermal conversion agent is p-benzoquinone dioxime.

[0014] Preferably, in step (1), the mixing temperature is 30-40°C.

[0015] Preferably, in step (2), the mixing temperature is 40-50°C.

[0016] Preferably, in step (1), the epoxy resin I, zinc powder, talcum powder and curing agent are calculated in parts by mass:

[0017] Epoxy resin I 60-65 parts, zinc powder 10-15 parts, talcum powder 5-10 parts, curing agent 5-8 parts.

[0018] Preferably, the step (1) further comprises the following raw materials in parts by weight: 0.5-1 part of a leveling agent and 30-35 parts of water.

[0019] Preferably, in step (2), the epoxy resin ⅠⅠ, 2,2,6,6-tetramethylpiperidinol, light stabilizer M, light stabilizer N, acetone, and photothermal conversion agent are calculated in parts by mass:

[0020] Epoxy resin ⅠⅠ 75-80 parts, 2,2,6,6-tetramethylpiperidinol 4-5 parts, light stabilizer M 1-1.5 parts, light stabilizer N 0.5-0.75 parts, acetone 5-7 parts, curing agent 6-9 parts, photothermal conversion agent 1-2 parts.

[0021] Preferably, the step (2) further comprises the following raw materials in parts by weight: 0.5-1 part of a leveling agent.

[0022] Preferably, in step (2), the method for preparing the light stabilizer M comprises the following steps:

[0023] Under nitrogen protection, 2,2,6,6-tetramethylpiperidinol and methyl tert-butyl acetate were mixed, acetone and dioctyltin oxide were added, and the temperature was raised to 160-170°C for reaction for 2-3h to obtain light stabilizer M.

[0024] Preferably, when preparing the light stabilizer M, the mass ratio of 2,2,6,6-tetramethylpiperidinol, methyl tert-butyl acetate and dioctyltin oxide is 1:0.85-1.25:0.04-0.08.

[0025] Preferably, in step (2), the method for preparing the light stabilizer N comprises the following steps:

[0026] Under nitrogen protection, 2,2,6,6-tetramethylpiperidinol and methyl p-tert-butylbenzoate were mixed, acetone and dioctyltin oxide were added, and the temperature was raised to 170-180°C for reaction for 2-4h to obtain light stabilizer N.

[0027] Preferably, when preparing light stabilizer N, the mass ratio of 2,2,6,6-tetramethylpiperidinol, methyl p-tert-butylbenzoate and dioctyltin oxide is 1:1.85-2.45:0.06-0.1.

[0028] Preferably, in step (1), the zinc powder is flaky zinc powder, and the mesh size of the flaky zinc powder is 600-800 mesh.

[0029] Preferably, in step (1), the mesh size of the talc powder is 1000-1200 mesh.

[0030] In component A, the flaky zinc powder can form an overlapping and staggered structure in the material, which greatly increases the distance that water and corrosive media can penetrate through the material, thereby improving the material's corrosion resistance; the 600-800 mesh flaky zinc powder has a moderate particle size and is evenly distributed, which can better fill the tiny pores in the epoxy anti-corrosion material and improve the density and hardness of the material.

[0031] In component A, the naturally stable flaky structure of talc can effectively prevent the penetration of corrosive media such as acids, alkalis and salts in the material, thereby extending the service life of the coating; talc with a slightly larger mesh size makes the coating surface smoother and flatter; talc with too small a mesh size has a larger particle size and is easily unevenly distributed in the coating, affecting the flatness of the coating.

[0032] The curing agent described in the present invention can be a commonly used curing agent without special limitation, such as diethylenetriamine, triethylenetetramine, ethylenediamine, etc.; the leveling agent used in component A of the present invention can be a commonly used leveling agent without special limitation, such as German BYK BYK-333, BYK-358N, etc.; the leveling agent used in component B of the present invention is Dow Corning DC-57; no further details are given here.

[0033] In a second aspect, the present invention provides an epoxy anti-corrosion material, which is prepared by the above-mentioned method for preparing the epoxy anti-corrosion material.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] (1) The epoxy anticorrosion material prepared by the present invention is a two-component coating. When used, component B is first applied to the coated material, and then component A is applied; component A is mainly prepared by filling flaky zinc powder and talcum powder in the epoxy resin I matrix to obtain an epoxy resin coating with a relatively dense surface structure, which can effectively prevent the light stabilizer in component B from volatilizing into the air. At the same time, the density and low porosity make it difficult for oxygen molecules in the air to enter the epoxy resin system, thereby slowing down the aging rate of the epoxy anticorrosion material under light-oxidation conditions;

[0036] (2) Three light stabilizers with different steric hindrances are used in component B prepared by the present invention; in terms of steric hindrance, 2,2,6,6-tetramethylpiperidinol < light stabilizer M < light stabilizer N; in terms of migration rate, 2,2,6,6-tetramethylpiperidinol > light stabilizer M > light stabilizer N; different light stabilizer molecules have different migration rates, and 2,2,6,6-tetramethylpiperidinol with the smallest steric hindrance is first concentrated in the upper layer of the epoxy anticorrosive material, followed by light stabilizer M and light stabilizer N in turn; when the surface layer 2,2,6,6-tetramethylpiperidinol is lost due to inactivation, the lower layer light stabilizer with high steric hindrance and slow migration rate can be supplemented, so that the surface light stabilizer concentration maintains a dynamic balance between consumption and replenishment, so that it can play a role in the coating for a longer time;

[0037] (3) The epoxy anti-corrosion material prepared by the present invention can improve the problem that the low molecular weight light stabilizer is easy to volatilize out of the coating and the high molecular weight light stabilizer cannot migrate to the surface of the coating and increase the usage through the superposition of component A and component B; the epoxy anti-corrosion material prepared by the present invention can effectively improve the aging resistance and corrosion resistance of the coated material, thereby extending the service life of the coated material. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The synthetic route diagram of the light stabilizer M and the light stabilizer N of the present invention is shown in FIG. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments.

[0040] In the following embodiments, the curing agent can be a commonly used curing agent without special limitation, such as diethylenetriamine, triethylenetetramine, ethylenediamine, etc.; the leveling agent in component A can be a commonly used leveling agent without special limitation, such as German BYK-333, BYK-358N, etc.; the leveling agent in component B is Dow Corning DC-57; no further details are given here.

[0041] Example 1

[0042] A method for preparing an epoxy anticorrosive material, the specific steps are as follows:

[0043] (1) Preparation of light stabilizer M

[0044] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 26.74 g of methyl tert-butyl acetate were mixed, and then 600 mL of acetone and 1.58 g of dioctyltin oxide were added, and the temperature was raised to 170°C at a rate of 5°C / min and reacted for 2 h to obtain light stabilizer M;

[0045] (2) Preparation of light stabilizer N

[0046] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 58.19 g of methyl p-tert-butylbenzoate were mixed, and then 800 mL of acetone and 2.52 g of dioctyltin oxide were added, and the temperature was raised to 170°C at a rate of 6°C / min and reacted for 2 h to obtain light stabilizer N;

[0047] The synthetic route of light stabilizer M and light stabilizer N is shown in Figure 1 ;

[0048] (3) Preparation of component A

[0049] 10g of 600-mesh flaky zinc powder and 5g of 1000-mesh talcum powder were added to 35g of water and mixed evenly. 65g of phenolic epoxy resin F-44 was added and stirred at 30°C for 0.5h. 6g of curing agent diethylenetriamine and 0.5g of leveling agent BYK-333 were added and stirred for 2h to obtain component A.

[0050] (4) Preparation of component B

[0051] 1.5 g of light stabilizer M, 0.5 g of light stabilizer N, 4 g of 2,2,6,6-tetramethylpiperidinol and 7 g of acetone were mixed evenly, stirred at 45°C for 20 min, and then 75 g of epoxy resin E-44, 7 g of curing agent diethylenetriamine, 0.1 g of leveling agent DC-57 and 2 g of photothermal conversion agent benzoquinone dioxime were added and stirred continuously to obtain component B.

[0052] An epoxy anti-corrosion material is prepared by the preparation method of Example 1.

[0053] The epoxy anticorrosive material prepared in Example 1 was applied onto a steel plate in the order of first applying component B and then applying component A, and was recorded as sample 1.

[0054] Example 2

[0055] A method for preparing an epoxy anticorrosive material, the specific steps are as follows:

[0056] (1) Preparation of light stabilizer M

[0057] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 39.31 g of methyl tert-butyl acetate were mixed, and then 600 mL of acetone and 1.26 g of dioctyltin oxide were added, and the temperature was raised to 165 ° C at a rate of 6 ° C / min for 3 h to obtain light stabilizer M;

[0058] (2) Preparation of light stabilizer N

[0059] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 62.9 g of methyl p-tert-butylbenzoate were mixed, and then 800 mL of acetone and 1.89 g of dioctyltin oxide were added, and the temperature was raised to 180 ° C at a rate of 5 ° C / min for 3 h to obtain light stabilizer N;

[0060] (3) Preparation of component A

[0061] 12g 650 mesh flaky zinc powder and 7g 1200 mesh talcum powder were added to 30g water and mixed evenly, 60g phenolic epoxy resin F-44 was added and stirred at 35°C for 1h, 5g curing agent ethylenediamine and 0.2g leveling agent BYK-333 were added, and stirring was continued for 2h to obtain component A;

[0062] (4) Preparation of component B

[0063] 1.2 g of light stabilizer M, 0.75 g of light stabilizer N, 4 g of 2,2,6,6-tetramethylpiperidinol and 5 g of acetone were mixed evenly, stirred at 40°C for 25 min, and then 80 g of epoxy resin E-44, 6 g of curing agent ethylenediamine, 0.2 g of leveling agent DC-57 and 1 g of photothermal conversion agent benzoquinone dioxime were added and stirred continuously to obtain component B.

[0064] An epoxy anti-corrosion material is prepared by the preparation method of Example 2.

[0065] The epoxy anti-corrosion material prepared in Example 2 was applied onto a steel plate in the order of first applying component B and then applying component A, and was recorded as sample 2.

[0066] Example 3

[0067] A method for preparing an epoxy anticorrosive material, the specific steps are as follows:

[0068] (1) Preparation of light stabilizer M

[0069] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 34.6 g of methyl tert-butyl acetate were mixed, and then 600 mL of acetone and 2.51 g of dioctyltin oxide were added, and the temperature was raised to 160°C at a rate of 6°C / min and reacted for 3 h to obtain light stabilizer M;

[0070] (2) Preparation of light stabilizer N

[0071] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 77.05 g of methyl p-tert-butylbenzoate were mixed, and then 800 mL of acetone and 3.14 g of dioctyltin oxide were added, and the temperature was raised to 175 ° C at a rate of 5 ° C / min for 4 hours to obtain light stabilizer N;

[0072] (3) Preparation of component A

[0073] 15 g of 800-mesh flaky zinc powder and 10 g of 1100-mesh talc were added to 32 g of water and mixed evenly. 65 g of phenolic epoxy resin F-44 was added and stirred at 40° C. for 1 h. 8 g of curing agent triethylenetetramine and 0.2 g of leveling agent BYK-358N were added and stirred for 3 h to obtain component A.

[0074] (4) Preparation of component B

[0075] 1.2 g of light stabilizer M, 0.6 g of light stabilizer N, 5 g of 2,2,6,6-tetramethylpiperidinol and 7 g of acetone were mixed evenly, stirred at 4°C for 25 min, and then 75 g of epoxy resin E-44, 9 g of curing agent triethylenetetramine, 0.4 g of leveling agent DC-57 and 1 g of photothermal conversion agent benzoquinone dioxime were added and stirred continuously to obtain component B.

[0076] An epoxy anti-corrosion material is prepared by the preparation method of Example 3.

[0077] The epoxy anti-corrosion material prepared in Example 3 was applied onto a steel plate in the order of first applying component B and then applying component A, and was recorded as sample 3.

[0078] Example 4

[0079] A method for preparing an epoxy anticorrosive material, the specific steps are as follows:

[0080] (1) Preparation of light stabilizer M

[0081] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 28.31 g of methyl tert-butyl acetate were mixed, and then 600 mL of acetone and 1.89 g of dioctyltin oxide were added, and the temperature was raised to 165 ° C at a rate of 7 ° C / min for 2 h to obtain light stabilizer M;

[0082] (2) Preparation of light stabilizer N

[0083] Under nitrogen protection, 31.45 g of 2,2,6,6-tetramethylpiperidinol and 69.19 g of methyl p-tert-butylbenzoate were mixed, and then 800 mL of acetone and 2.52 g of dioctyltin oxide were added, and the temperature was raised to 170°C at a rate of 7°C / min and reacted for 4 h to obtain light stabilizer N;

[0084] (3) Preparation of component A

[0085] 10 g of 700-mesh flaky zinc powder and 7 g of 1000-mesh talc were added to 30 g of water and mixed evenly. 60 g of phenolic epoxy resin F-44 was added and stirred at 40° C. for 0.5 h. 8 g of curing agent diethylenetriamine and 0.3 g of leveling agent BYK-358N were added and stirred for 3 h to obtain component A.

[0086] (4) Preparation of component B

[0087] 1 g of light stabilizer M, 0.6 g of light stabilizer N, 5 g of 2,2,6,6-tetramethylpiperidinol and 5 g of acetone were mixed evenly, stirred at 50°C for 30 min, and then 80 g of epoxy resin E-44, 8 g of curing agent diethylenetriamine, 0.2 g of leveling agent DC-57 and 2 g of photothermal conversion agent p-benzoquinone dioxime were added and stirred continuously to obtain component B.

[0088] An epoxy anti-corrosion material is prepared by the preparation method of Example 4.

[0089] The epoxy anti-corrosion material prepared in Example 4 was applied onto a steel plate in the order of first applying component B and then applying component A, and was recorded as sample 4.

[0090] Comparative Example 1

[0091] A method for preparing an epoxy anticorrosive material, which is different from Example 1 in that this comparative example examines the effect of the amount of light stabilizer added on the epoxy anticorrosive material, and the rest is the same as Example 1. The epoxy anticorrosive material prepared in Comparative Example 1 is applied to a steel plate in the order of first applying component B and then applying component A, and is respectively recorded as Samples 5 to 8, as shown in Table 1.

[0092] Table 1 Light stabilizer addition amount

[0093]

[0094] Comparative Example 2

[0095] A method for preparing an epoxy anticorrosive material, which is different from Example 1 in that this comparative example investigates the effect of zinc powder on the epoxy anticorrosive material, and the rest is the same as Example 1. The epoxy anticorrosive material prepared in Comparative Example 2 is applied to a steel plate in the order of first applying component B and then applying component A, and is respectively recorded as Samples 9 to 11, as shown in Table 2.

[0096] Table 2 Particle size and morphology of zinc powder

[0097]

[0098] Comparative Example 3

[0099] A method for preparing an epoxy anticorrosive material is different from Example 1 in that component A is not prepared in this comparative example, and the rest is the same as Example 1. Component B prepared in Comparative Example 3 is coated on a steel plate, which is recorded as Sample 12.

[0100] Related tests

[0101] Relevant tests were performed on samples 1 to 12 prepared in Examples 1 to 4 and Comparative Examples 1 to 3, and the test results are shown in Tables 3 and 4.

[0102] The adhesion is tested in accordance with GB / T 9286-2021; the salt spray resistance is tested in accordance with GB / T 1771-2007; and the aging resistance is tested in accordance with GB / T 1766-2008.

[0103] Table 3 Related test results

[0104]

[0105] Table 4 Related test results (aging resistance)

[0106]

[0107] By comparing Example 1 with Comparative Example 1b and Comparative Example 1c, it can be seen that when the total amount of light stabilizer added remains unchanged, the amount of each stabilizer added, light stabilizer M, light stabilizer N and 2,2,6,6-tetramethylpiperidinol, is reduced in the order of "2,2,6,6-tetramethylpiperidinol>light stabilizer M>light stabilizer N" to reach the optimal ratio; because 2,2,6,6-tetramethylpiperidinol with the smallest steric hindrance is first concentrated in the upper layer of the epoxy anticorrosive material, followed by light stabilizer M and light stabilizer N, so 2,2,6,6-tetramethylpiperidinol takes precedence and light stabilizer M and light stabilizer N are slowly replenished in sequence; the aging degree of comparative example 1c is slightly worse than that of comparative example 1b, which may be that the amount of light stabilizer M is small, and the light stabilizer N has not been replenished in time, so the aging degree is aggravated; from the comparison between Example 1 and Comparative Example 1d, it can be seen that the present invention can still achieve the same effect as comparative example 1d when the total amount of light stabilizer is small; from the comparison between Example 1 and Comparative Example 1, it can be seen that the light stabilizer has excellent performance and reasonable ratio, so that the epoxy anti-corrosion material has strong aging resistance, and at the same time, the addition of the light stabilizer does not affect the leveling, adhesion and other properties of the epoxy anti-corrosion material.

[0108] From the comparison between Example 1 and Comparative Example 2a and Comparative Example 2b, it can be seen that if the particle size of the flaky zinc powder is too large, it is easy to be unevenly distributed in the coating, making the coating surface granular, affecting the flatness and adhesion, and easily causing pitting in a corrosive environment; if the particle size of the flaky zinc powder is too small, it is easy to agglomerate, causing the coating to agglomerate and affecting the appearance of the coating. From the comparison between Comparative Example 1 and Comparative Example 2c, it can be seen that the performance of spherical zinc powder is slightly worse than that of flaky zinc powder in all aspects; the flaky zinc powder is arranged parallel to the surface of the coating in the coating, and the flaky zinc powder can form a mutually overlapping and staggered structure in the material, increasing the distance for water and corrosive media to penetrate the material; at the same time, the flaky zinc powder contacts the coated material with the contact surface, has better adhesion, and the formed coating is denser, which improves the anti-corrosion ability of the epoxy anti-corrosion material.

[0109] By comparing Example 1 with Comparative Example 3, it can be seen that talcum powder and flaky zinc powder are added to component A. Compared with component B, component A has stronger compactness and better anti-corrosion performance; the migration speed of the light stabilizer in component A is slightly slower than the migration speed of the light stabilizer in component B, which effectively avoids the volatilization of the light stabilizer. Therefore, component A is covered on component B at the same time, and compared with a single component, the aging resistance is better.

[0110] Although the present technology has been described with reference to certain embodiments, those skilled in the art will recognize that various modifications, changes, omissions and substitutions may be made without departing from the spirit of the present disclosure. Therefore, the present disclosure is intended to be limited only by the scope of the appended claims.

Claims

1. A method for preparing an epoxy anticorrosive material, characterized in that: The epoxy anticorrosion material is composed of component A and component B, and the epoxy anticorrosion material includes the following preparation steps: Step (1): uniformly mixing zinc powder, talcum powder, epoxy resin I and curing agent to obtain component A; Step (2): uniformly mixing light stabilizer M, light stabilizer N, 2,2,6,6-tetramethylpiperidinol, acetone, epoxy resin II and a photothermal conversion agent to obtain component B; Wherein, the light stabilizer M is mainly prepared by the reaction of 2,2,6,6-tetramethylpiperidinol and methyl tert-butyl acetate, and the light stabilizer N is mainly prepared by the reaction of 2,2,6,6-tetramethylpiperidinol and methyl p-tert-butylbenzoate; When the epoxy anticorrosive material is used, component B is firstly applied on the material to be coated, and then component A is applied.

2. The method for preparing the epoxy anticorrosive material according to claim 1, characterized in that: In the step (1), the epoxy resin I, zinc powder, talcum powder and curing agent are calculated in parts by mass: Epoxy resin I 60-65 parts, zinc powder 10-15 parts, talcum powder 5-10 parts, curing agent 5-8 parts.

3. The method for preparing the epoxy anticorrosive material according to claim 1, characterized in that: In the step (2), the epoxy resin ⅠⅠ, 2,2,6,6-tetramethylpiperidinol, light stabilizer M, light stabilizer N, acetone, and photothermal conversion agent are calculated in parts by mass: Epoxy resin ⅠⅠ 75-80 parts, 2,2,6,6-tetramethylpiperidinol 4-5 parts, light stabilizer M 1-1.5 parts, light stabilizer N 0.5-0.75 parts, acetone 5-7 parts, curing agent 6-9 parts, photothermal conversion agent 1-2 parts.

4. The method for preparing the epoxy anticorrosive material according to claim 1, characterized in that: In step (2), the preparation method of the light stabilizer M comprises the following steps: Under nitrogen protection, 2,2,6,6-tetramethylpiperidinol and methyl tert-butyl acetate were mixed, acetone and dioctyltin oxide were added, and the temperature was raised to 160-170°C for reaction for 2-3h to obtain light stabilizer M.

5. The method for preparing the epoxy anticorrosive material according to claim 4, characterized in that: When preparing the light stabilizer M, the mass ratio of 2,2,6,6-tetramethylpiperidinol, methyl tert-butyl acetate and dioctyltin oxide is 1:0.85-1.25:0.04-0.

08.

6. The method for preparing the epoxy anticorrosive material according to claim 1, characterized in that: In the step (2), the preparation method of the light stabilizer N comprises the following steps: Under nitrogen protection, 2,2,6,6-tetramethylpiperidinol and methyl p-tert-butylbenzoate were mixed, acetone and dioctyltin oxide were added, and the temperature was raised to 170-180°C for reaction for 2-4h to obtain light stabilizer N.

7. The method for preparing the epoxy anticorrosive material according to claim 6, characterized in that: When preparing light stabilizer N, the mass ratio of 2,2,6,6-tetramethylpiperidinol, methyl p-tert-butylbenzoate and dioctyltin oxide is 1:1.85-2.45:0.06-0.

1.

8. The method for preparing the epoxy anticorrosive material according to claim 1, characterized in that: In step (1), the zinc powder is flaky zinc powder, and the mesh size of the flaky zinc powder is 600-800 mesh.

9. The method for preparing the epoxy anticorrosive material according to claim 1, characterized in that: In step (1), the mesh size of the talc powder is 1000-1200 mesh.

10. An epoxy anticorrosive material, characterized in that: The epoxy anti-corrosion material is prepared by the preparation method of the epoxy anti-corrosion material according to any one of claims 1-9.

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