Polyaspartic acid ester polyurea coating as well as preparation method and application thereof

Abstract

The invention discloses a polyaspartic acid ester polyurea coating as well as a preparation method and application thereof. The polyaspartic acid ester polyurea coating comprises a component A and a component B, the mass ratio of the component A to the component B is (3-5): 1; the component A is prepared from the following raw materials: polyaspartic acid ester, a silane-terminated polyether polymer, a processing aid and a filler; and the preparation raw material of the component B comprises aliphatic polyisocyanate. The silane modified ether polymer is added into the polyaspartic acid ester polyurea anticorrosive paint disclosed by the invention, so that the toughness, strength and compactness of a prepared coating can be improved, and the impact resistance and chemical corrosion resistance of the coating are enhanced. The silane structure of the silane modified polymer is used as an adhesion promoter to improve the bonding effect of the coating and the base material and improve the adhesion between the polyaspartic acid ester polyurea coating and the substrate, so that other primer is not needed, the construction process is simplified, the construction efficiency is improved, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and particularly relates to a polyaspartic ester polyurea coating, a preparation method thereof, and an application thereof. Background Art

[0002] Polyaspartic ester polyurea is the third-generation new polyurea that emerged after aromatic polyurea and aliphatic polyurea. It has the advantages of adjustable curing time, no need for special construction equipment, good coating appearance state, sufficient wetting of the substrate, good color retention, and good ultraviolet resistance, and is widely used in industries such as construction, pipelines, and water conservancy.

[0003] Polyaspartic ester polyurea generally uses HDI trimer or aliphatic isocyanate prepolymer as a curing agent. The polyaspartic ester polyurea coating cured by HDI trimer has a high crosslinking density and excellent corrosion resistance, but has poor toughness and impact resistance, resulting in damage to the paint film; aliphatic isocyanate prepolymer is generally formed by the reaction of polyester polyol or polyether polyol with aliphatic isocyanate, which can significantly improve the flexibility of the polyaspartic ester polyurea coating and improve the impact resistance. However, the prepolymer prepared from polyester polyol has a high viscosity, making it difficult to prepare a solvent-free coating, which does not conform to the concept of low-carbon environmental protection. At the same time, polyester polyol has poor water resistance; the prepolymer prepared from polyether polyol has a moderate viscosity, but poor weather resistance and poor anti-corrosion performance, and cannot meet the application requirements of long-term high-performance petrochemical and marine anti-corrosion fields. On the other hand, the adhesion of polyaspartic ester polyurea to various substrates is poor, and it is often necessary to apply a primer first, increasing the complexity of construction. Summary of the Invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, one of the purposes of the present invention is to provide a polyaspartic ester polyurea coating. The second purpose of the present invention is to provide a preparation method of the above polyaspartic ester polyurea coating. The third purpose of the present invention is to provide an application of the above polyaspartic ester polyurea coating.

[0005] In order to achieve the above purposes, the technical solutions adopted by the present invention are as follows:

[0006] The present invention provides a polyaspartic ester polyurea coating in the first aspect, which includes component A and component B; the component A and component B are composed according to a mass ratio of (3-6):1; the preparation raw materials of the component A include polyaspartic ester and a silane-modified polymer; the preparation raw materials of the component B include an aliphatic polyisocyanate.

[0007] Preferably, it is composed of component A and component B according to a mass ratio of (3-4):1

[0008] Preferably, by mass percentage, the raw materials for preparing Component A include: polyaspartate ester: 30% - 50%; silane-terminated polyether polymer: 5% - 20%; additives: 5% - 18%; fillers: 30% - 50%.

[0009] Preferably, the silane-modified polymer is at least one of α-silane-modified polyether polymer or α-silane-modified polyurethane polymer, and its structural formula is as shown in Formula a:

[0010]

[0011] Among them, R is a polyether polymer segment or a polyurethane segment.

[0012] More preferably, the silane-modified polymer is selected from at least one of WP1 of Wacker Chemie AG, XB 502 of Wacker Chemie AG, XT 120 of Wacker Chemie AG, XT 50 of Wacker Chemie AG, BS 6920 of Wacker Chemie AG, BS 6921 of Wacker Chemie AG.

[0013] Preferably, the polyaspartate ester is selected from at least one of tetraethyl N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartate, tetrabutyl N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartate, tetraethyl N,N'-(methylenedi-(1-methyl,-4,1-cyclohexanediyl))diaspartate, and tetrabutyl N,N'-(methylenedi-(1-methyl,-4,1-cyclohexanediyl))diaspartate.

[0014] Preferably, the aliphatic polyisocyanate is selected from at least one of hexamethylene diisocyanate trimer and hexamethylene diisocyanate biuret.

[0015] Preferably, the additives include latent curing agents.

[0016] The polyaspartate ester polyurea anticorrosive coating of the present invention is crosslinked and cured based on the secondary amino group in the polyaspartate ester and the NCO in the polyisocyanate to form an anticorrosive coating. The latent curing agent ketimine or aldehyde imine undergoes hydrolysis in the presence of water vapor during the coating curing to generate amine molecules, which not only reduces the reaction of NCO with water vapor to produce bubbles and affects the coating density, but also the generated amine molecules can further react with the NCO in the polyisocyanate, improving the crosslinking density and increasing the mechanical properties such as the strength and wear resistance of the coating.

[0017] More preferably, the latent curing agent includes at least one of ketimine and aldehyde imine.

[0018] Preferably, the processing aids further include a dispersant, a leveling agent, an antifoaming agent, and a water remover.

[0019] More preferably, by mass percentage, the raw materials for preparing component A include: polyaspartic acid ester: 30% - 50%; silane-terminated polyether polymer: 5% - 20%; dispersant: 0.3% - 0.5%; leveling agent: 0.2% - 1%; antifoaming agent: 0.3% - 1%; water remover: 3 - 10%; latent curing agent: 1 - 5%; filler: 30 - 50%.

[0020] More preferably, the dispersant is selected from at least one of DISPERBYK-161 of BYK, DISPERBYK-163 of BYK, BAFT SPERSE-5265S of Bafute, and AFCONA-4071 of Efka.

[0021] More preferably, the antifoaming agent is selected from at least one of TEGO Airex 900 of Degussa, Defom 6800 of Elementis Specialties, AFCONA-2727 of Efka, and BYK-057 of BYK.

[0022] More preferably, the leveling agent is selected from at least one of BYK-333 of BYK, FLOW 361S of Ucar Chemical, FLOW 375S of Ucar Chemical, AFCONA-3670 of Efka, Crayvallac@Flow-100 of Arkema, and Crayvallac@Flow-450 of Arkema.

[0023] More preferably, the water remover is molecular sieve.

[0024] Preferably, the filler includes at least one of titanium dioxide, barium sulfate, mica powder, and silica powder.

[0025] The second aspect of the present invention provides a method for preparing the polyaspartic acid ester polyurea coating described in the first aspect, including the following steps: respectively mixing the raw materials of component A and component B, and then mixing component A and component B to obtain the polyaspartic acid ester polyurea coating.

[0026] Preferably, the mixing process of component A includes the following steps: first, stir and mix polyaspartic acid ester, dispersant, leveling agent, and antifoaming agent, then add the water remover and filler into the mixing system for stirring and mixing, and finally add the latent curing agent and silane-modified polymer for stirring and mixing to obtain component A.

[0027] More preferably, the mixing process of component A specifically includes the following steps: adding polyaspartate ester into a stirring device, stirring at a rotation speed of 300 - 500 r / min for 5 - 10 min, then adding a dispersant, a leveling agent and an antifoaming agent, and continuing to stir for 5 - 10 min; then adding a water remover and a filler, adjusting the stirring speed to 1000 - 2000 r / min, and stirring for 30 - 60 min; adjusting the stirring speed to 500 - 1000 r / min, adding a latent curing agent and a silane-modified polymer, and continuing to stir for 5 - 10 min to obtain component A.

[0028] The third aspect of the present invention provides the application of the polyaspartate ester polyurea coating described in the first aspect in the preparation of an anti-corrosion coating.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1) The polyaspartate ester polyurea anti-corrosion coating of the present invention is added with a silane-modified polymer, the main chain of which is a soft polyether or polyurethane segment, providing excellent flexibility for the coating. The two ends are connected with α-silanes containing isocyanate groups. There is only one methylene group between the organic functional group on the capped silane and the siloxane, and the electron-donating group is blocked only by one methylene group. Therefore, the cross-linking reaction speed is greatly increased. In a general formulation system, no tin catalyst is required, and it can react and cure in the presence of the primary amine released after the hydrolysis of the latent curing agent, forming an interpenetrating network structure with the polyurea segment, which can improve the toughness, strength and density of the obtained coating, thereby enhancing the impact resistance and chemical corrosion resistance of the coating.

[0031] 2) The polyaspartate ester polyurea anti-corrosion coating of the present invention is added with a silane-modified polymer, and its silane structure improves the bonding effect between the coating and the substrate as an adhesion promoter, enhancing the adhesion between the polyaspartate ester polyurea coating and the substrate, so that other primers do not need to be used, simplifying the construction process, improving the construction efficiency and reducing the construction cost.

[0032] 3) The polyaspartate ester polyurea anti-corrosion coating of the present invention is a solvent-free polyurea coating. Since it does not contain solvents, the coating has the characteristics of environmental friendliness and high safety, and can be applied to the internal and external anti-corrosion coatings of drinking water pipelines, and can also be applied to the internal and external anti-corrosion coatings of petrochemical storage tanks, etc. Specific Embodiments

[0033] The content of the present invention will be further described in detail through specific examples below. The raw materials used in the following examples can be obtained from conventional commercial channels or prepared and separated by simple synthesis if not otherwise specified; the processes used, if not otherwise specified, are all conventional processes in the art.

[0034] Example 1

[0035] This embodiment provides a polyaspartic ester polyurea coating, and its composition is shown in Table 1 below:

[0036] Table 1 Composition table of the polyaspartic ester polyurea coating of Example 1

[0037]

[0038] The preparation method of the above polyaspartic ester polyurea coating is as follows:

[0039] 1) Add tetraethyl N,N'-(methylenedi-4,1-cyclohexanediyl) diaspartate to the stirring tank, stir at a speed of 500 r / min for 10 min, then add DISPERBYK-161, AFCONA-3670 and TEGO Airex 900, continue to stir for 10 min, then add molecular sieve, titanium dioxide, silica powder, adjust the stirring speed to 1500 r / min, stir for 45 min, adjust the stirring speed to 600 r / min, and add ketimine and silicon α-silane modified polymer WP1, continue to stir for 10 min to obtain Component A;

[0040] 2) Weigh hexamethylene diisocyanate trimer to obtain Component B;

[0041] 3) Mix Component A and Component B in a mass ratio of 3.5:1, stir for 2 min to prepare the polyaspartic ester polyurea coating.

[0042] Example 2

[0043] This embodiment provides a polyaspartic ester polyurea coating, and its composition is shown in Table 2 below:

[0044] Table 2 Composition table of the polyaspartic ester polyurea coating of Example 2

[0045]

[0046] The preparation method of the above polyaspartic ester polyurea coating is as follows:

[0047] 1) Add tetraethyl N,N'-(methylenedi-(1-methyl,-4,1-cyclohexanediyl)) diaspartate to the stirring tank, stir at a speed of 3400 r / min for 8 min, then add BAFT SPERSE-5265S, AFCONA-3670 and TEGOAirex900, continue to stir for 7 min, then add molecular sieve, titanium dioxide, mica powder, barium sulfate, adjust the stirring speed to 1500 r / min, stir for 60 min, adjust the stirring speed to 800 r / min, and add ketimine and α-silane modified polymer BS6920, continue stirring for 10 min to obtain Component A;

[0048] 2) Weigh hexamethylene diisocyanate trimer to obtain Component B;

[0049] 3) Mix Component A and Component B in a mass ratio of 4:1 and stir for 2 min to prepare the polyaspartic ester polyurea coating.

[0050] Example 3

[0051] This example provides a polyaspartic ester polyurea coating, and its composition is shown in Table 3 below:

[0052] Table 3 Composition table of the polyaspartic ester polyurea coating in Example 3

[0053]

[0054] The preparation method of the above polyaspartic ester polyurea coating is as follows:

[0055] 1) Add N,N'-(methylenedi-(1-methyl,-4,1-cyclohexanediyl)) diethyl aspartate and N,N'-(methylenedi-4,1-cyclohexanediyl) dibutyl aspartate to the stirring tank, stir at a speed of 300 r / min for 6 min, then add BAFT SPERSE-5265S, BYK-333 and continue stirring for 10 min, then add molecular sieve, titanium dioxide, silica powder, barium sulfate, adjust the stirring speed to 2000 r / min, stir for 60 min, adjust the stirring speed to 1000 r / min, add aldehyde imine and α-silane modified polymer BS 6920, continue stirring for 5 - 10 min to obtain Component A;

[0056] 2) Weigh hexamethylene diisocyanate biuret to obtain Component B;

[0057] 3) Mix Component A and Component B in a mass ratio of 3.5:1 and stir for 1 - 2 min to prepare the polyaspartic ester polyurea coating.

[0058] Example 4

[0059] This example provides a polyaspartic ester polyurea coating, and its composition is shown in Table 4 below:

[0060] Table 4 Composition table of the polyaspartic ester polyurea coating in Example 4

[0061]

[0062] The preparation method of the above polyaspartic ester polyurea coating is as follows:

[0063] 1) Add tetrabutyl N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartate to a stirring tank, stir at a rotation speed of 300 r / min for 10 min, then add AFCONA-4071, BYK-333 and BYK-057, continue to stir for 10 min, then add molecular sieve, titanium dioxide, silica powder, adjust the stirring speed to 2000 r / min, stir for 60 min, adjust the stirring speed to 800 r / min, and add aldehyde imine and α-silane modified polymer XT 120 and XB 502, continue to stir for 10 min to obtain Component A;

[0064] 2) Weigh hexamethylene diisocyanate trimer and hexamethylene diisocyanate biuret, put them into a stirring tank and mix evenly to obtain Component B;

[0065] 3) Mix Component A and Component B in a mass ratio of 3.5:1, stir for 2 min to prepare the polyaspartate polyurea coating.

[0066] Comparative Example 1

[0067] This comparative example provides a polyaspartate polyurea coating, which is different from Example 1 in that the ketone imine is replaced by silica powder, and its composition is shown in Table 5 below:

[0068] Table 5 Composition Table of Polyaspartate Polyurea Coating in Comparative Example 1

[0069]

[0070] The preparation method of the above polyaspartate polyurea anticorrosive coating is as follows:

[0071] 1) Add tetraethyl N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartate to a stirring tank, stir at a rotation speed of 500 r / min for 10 min, then add DISPERBYK-161, AFCONA-3670 and TEGO Airex 900, continue to stir for 10 min, then add molecular sieve, titanium dioxide, silica powder, adjust the stirring speed to 1500 r / min, stir for 45 min, adjust the stirring speed to 600 r / min, and add silica α-silane modified polymer WP1, continue to stir for 10 min to obtain Component A;

[0072] 2) Weigh hexamethylene diisocyanate trimer to obtain Component B;

[0073] 3) Mix component A and component B in a mass ratio of 3.5:1, and stir for 2 min to obtain a silane-capped polymer-modified polyaspartic acid polyurea anticorrosive coating.

[0074] Comparative Example 2

[0075] This comparative example provides a polyaspartic acid ester polyurea anticorrosive coating. The difference from Example 1 is that 10 parts of α-silane-capped polyether polymer WP1 is replaced by 8 parts of polyether polyol with a molecular weight of 1000 (DL1000 from Bluestar Dongda Co., Ltd.) and 2 parts of silane KH560. Its composition is shown in Table 6 below:

[0076] Table 6 Composition table of the polyaspartic acid ester polyurea anticorrosive coating in Comparative Example 2

[0077]

[0078] The preparation method of the above polyaspartic acid ester polyurea anticorrosive coating is as follows:

[0079] 1) Add N,N'-(methylenedi-4,1-cyclohexanediyl) diaspartic acid tetraethyl ester to the stirring tank, stir at a speed of 500 r / min for 10 min, then add DISPERBYK-161, AFCONA-3670 and TEGO Airex 900, continue to stir for 10 min, then add molecular sieve, titanium dioxide and silica powder, adjust the stirring speed to 1500 r / min, stir for 45 min, adjust the stirring speed to 600 r / min, add ketimine, polyether polyol and silane KH560, and continue to stir for 10 min to obtain component A;

[0080] 2) Weigh hexamethylene diisocyanate trimer to obtain component B;

[0081] 3) Mix component A and component B in a mass ratio of 3.5:1, and stir for 2 min to obtain a polyaspartic acid ester polyurea anticorrosive coating.

[0082] Comparative Example 3

[0083] This comparative example provides a polyaspartic acid ester polyurea anticorrosive coating. The difference from Example 1 is that the α-silane-modified polymer WP1 is replaced by a γ-silane-modified polymer (HP202 from Guangzhou Hechun Electronic Technology Co., Ltd.). Its composition is shown in Table 7 below:

[0084] Table 7 Composition table of the polyaspartic acid ester polyurea anticorrosive coating in Comparative Example 3

[0085]

[0086] The preparation method of the above-mentioned polyaspartic ester polyurea anticorrosive coating is as follows:

[0087] 1) Add tetraethyl N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartate to a stirring tank, stir at a speed of 500 r / min for 10 min, then add DISPERBYK-161, AFCONA-3670 and TEGO Airex 900, continue stirring for 10 min, then add molecular sieve, titanium dioxide and silica powder, adjust the stirring speed to 1500 r / min, stir for 45 min, adjust the stirring speed to 600 r / min, add ketimine and γ-silane modified polymer HP202, and continue stirring for 10 min to obtain Component A;

[0088] 2) Weigh hexamethylene diisocyanate trimer to obtain Component B;

[0089] 3) Mix Component A and Component B in a mass ratio of 3.5:1, stir for 2 min to prepare the polyaspartic polyurea anticorrosive coating.

[0090] Comparative Example 4

[0091] This comparative example provides a polyaspartic ester polyurea anticorrosive coating, and its composition is shown in Table 8 below:

[0092] Table 8 Composition table of the polyaspartic ester polyurea anticorrosive coating of Comparative Example 4

[0093]

[0094]

[0095] Remarks: The HDI prepolymer is a commonly used polyether polyol and HDI prepolymer on the market, and the NCO content is 23%.

[0096] The preparation method of the above-mentioned polyaspartic ester polyurea anticorrosive coating is as follows:

[0097] 1) Add tetraethyl N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartate to a stirring tank, stir at a speed of 500 r / min for 10 min, then add DISPERBYK-161, AFCONA-3670 and TEGO Airex 900, continue stirring for 10 min, then add molecular sieve, titanium dioxide and silica powder, adjust the stirring speed to 2000 r / min, stir for 50 min, adjust the stirring speed to 1000 r / min, add ketimine and silane KH560, and continue stirring for 10 min to obtain Component A;

[0098] 2) Weigh hexamethylene diisocyanate trimer to obtain Component B;

[0099] 3) Mix component A and component B in a mass ratio of 3.5:1, and stir for 2 minutes to obtain a polyaspartic ester polyurea anticorrosive coating.

[0100] Performance testing

[0101] There are currently no relevant testing standards for polyaspartic polyurea anticorrosive coatings. According to the performance indicators of acrylic polyurethane coatings and coatings in A.0.10 of the Technical Standard for Anti-Corrosion Engineering of Steel Petroleum Storage Tanks (GBT 50393-2017), the performance of the anticorrosive coatings in Examples 1-4 and Comparative Examples 1-4 was tested, and the test results are shown in Table 9 below:

[0102] Table 9 Performance test results of the floor coatings in Examples 1-4 and Comparative Examples 1-4

[0103]

[0104]

[0105] As can be seen from Table 9: By comparing Example 1 and Comparative Example 1, it can be seen that the coating does not contain latent curing agents such as ketimine or aldehyde imine, and the α-silane modified polymer is difficult to react due to the lack of primary amine catalysis, and its impact resistance and chemical corrosion resistance are both affected;

[0106] By comparing Example 1 and Comparative Example 2, it can be seen that for the polyaspartic ester polyurea anticorrosive coating prepared with ordinary silane as an adhesion promoter, the adhesion is also improved to a certain extent, but the flexibility and impact resistance are relatively poor. The polyaspartic ester polyurea anticorrosive coating of the present invention contains an α-silane modified polymer, which can improve the adhesion, flexibility, impact resistance, weather resistance and chemical corrosion resistance of the obtained coating more than the combination of silane and polyether.

[0107] By comparing Example 1 and Comparative Example 3, it can be seen that for the polyaspartic ester polyurea anticorrosive coating prepared with γ-silane modified polymer as an adhesion promoter, the adhesion is also improved to a certain extent, but the γ-silane modified polymer reacts incompletely under the catalysis of primary amine, and the improvement of properties such as adhesion and flexibility is limited. At the same time, due to the incomplete reaction, the chemical resistance such as acid and salt spray resistance becomes poor. The polyaspartic ester polyurea anticorrosive coating of the present invention contains an α-silane modified polymer, which can improve the adhesion, flexibility, impact resistance, weather resistance and chemical corrosion resistance of the obtained coating more than the γ-silane modified polymer.

[0108] By comparing Example 1 and Comparative Example 4, it can be seen that when using HDI prepolymer as a curing agent, the chemical resistance of the coating becomes poor, and the weather resistance of the coating is also relatively poor.

[0109] In summary, the polyaspartic ester polyurea anticorrosive coating prepared by the present invention has good adhesion, good flexibility, good weather resistance and excellent chemical corrosion resistance, and can be applied to indoor and outdoor places such as petrochemical and marine industries, providing long-term anticorrosive protection.

[0110] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A polyaspartic acid ester polyurea coating, characterized in that: The invention comprises component A and component B; the component A and component B are composed according to a mass ratio of (3-6):1; the raw materials for preparing component A include polyaspartic acid ester and silane-modified polymer; the raw materials for preparing component B include aliphatic polyisocyanate.

2. The polyaspartic acid ester polyurea coating according to claim 1, characterized in that: In terms of mass percentage, the raw materials for preparing the component A include polyaspartic acid ester: 30% to 50%; silane-modified polymer: 5% to 20%; auxiliary agent: 5% to 18%; and filler: 30% to 50%.

3. The polyaspartic acid ester polyurea coating according to claim 1, characterized in that: The silane-modified polymer is at least one of an α-silane-modified polyether polymer or an α-silane-modified polyurethane polymer, and its structural formula is shown in formula a: Wherein, R is a polyether segment or a polyurethane segment.

4. The polyaspartic acid ester polyurea coating according to claim 3, characterized in that: The α-silane modified polymer is selected from Wacker WP1, Wacker XB 502, Wacker XT 120, Wacker XT 50, Wacker BS 6920, Wacker At least one of BS 6921.

5. The polyaspartic acid ester polyurea coating according to claim 1, characterized in that: The polyaspartic acid ester is selected from at least one of N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartic acid tetraethyl ester, N,N'-(methylenedi-4,1-cyclohexanediyl)diaspartic acid tetrabutyl ester, N,N'-(methylenedi-(1-methyl, -4,1-cyclohexanediyl))diaspartic acid tetraethyl ester, and N,N'-(methylenedi-(1-methyl, -4,1-cyclohexanediyl))diaspartic acid tetrabutyl ester; And / or, the aliphatic polyisocyanate is selected from at least one of hexamethylene diisocyanate trimer and hexamethylene diisocyanate biuret.

6. The polyaspartic acid ester polyurea coating according to claim 2, characterized in that: The auxiliary agent includes a latent curing agent; Preferably, the latent curing agent includes at least one of ketimine and aldimine.

7. The polyaspartic acid ester polyurea coating according to claim 6, characterized in that: The additives also include dispersants, leveling agents, defoamers, and water removers; And / or, the filler includes at least one of titanium dioxide, barium sulfate, mica powder and silicon powder.

8. The method for preparing the polyaspartic acid ester polyurea coating according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: mixing the raw materials for preparing component A respectively to obtain component A, and then mixing component A and component B to obtain polyaspartic acid ester polyurea coating.

9. The method for preparing the polyaspartic acid ester polyurea coating according to claim 8, characterized in that: The mixing process of component A comprises the following steps: firstly, polyaspartic acid ester, dispersant, leveling agent and defoamer are stirred and mixed, then dewatering agent and filler are added into the mixed system and stirred and mixed, and finally, latent curing agent and silane-terminated polymer are added and stirred and mixed to obtain component A.

10. Use of the polyaspartic acid ester polyurea coating according to any one of claims 1 to 7 in the preparation of an anti-corrosion coating.

Images