High-toughness long-acting steel structure anticorrosive coating material and preparation method thereof

Abstract

The invention discloses a high-toughness long-acting steel structure anticorrosive coating material, and relates to the technical field of anticorrosive paint. The anti-rust paint is prepared from the following components in parts by mass: 15 to 20 parts of epoxy resin, 10 to 15 parts of organic silicon polyurethane modified epoxy resin, 5 to 10 parts of organic silicon oligomer containing multiple epoxy groups, 10 to 15 parts of polypropylene glycol diglycidyl ether, 4 to 6 parts of titanium dioxide, 5 to 10 parts of anti-rust pigment, 10 to 20 parts of micaceous iron oxide gray, 2 to 3 parts of auxiliaries, 30 to 40 parts of polyamide 650 and 10 to 15 parts of triethanolamine. The flexibility, the ultraviolet resistance and the corrosion resistance of the anti-corrosion coating material are remarkably improved, and the service life is effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of anticorrosive coatings, and particularly relates to a high-toughness long-lasting steel structure anticorrosive coating material and a preparation method thereof. Background Art

[0002] Steel structures are easily corroded by long-term ultraviolet irradiation, rainwater, etc. Therefore, it is particularly important during the normal and long-term service of steel structures. Epoxy resin has excellent mechanical properties, corrosion resistance, chemical resistance and good adhesion properties, and is commonly used as an anticorrosive coating material for steel structures. However, the cured product of epoxy resin has problems of insufficient anti-ultraviolet aging performance and high brittleness. High brittleness and insufficient toughness are likely to cause cracks and it is difficult to meet the requirements. Therefore, it is necessary to modify epoxy resin to improve its overall performance and the service performance of the anticorrosive coating material. Summary of the Invention

[0003] Aiming at the above problems, the technical problem to be solved by the present invention is to provide a high-toughness long-lasting steel structure anticorrosive coating material with high toughness, high anti-ultraviolet property and high anticorrosive property.

[0004] To solve the above technical problems, the technical scheme adopted by the present invention is as follows:

[0005] A high-toughness long-lasting steel structure anticorrosive coating material, characterized in that, by mass:

[0006] 15-20 parts of epoxy resin, 10-15 parts of organosilicon polyurethane modified epoxy resin, 5-10 parts of organosilicon oligomer containing multiple epoxy groups, 10-15 parts of polypropylene glycol diglycidyl ether, 4-6 parts of titanium dioxide, 5-10 parts of rust-inhibiting pigment, 10-20 parts of mica iron oxide gray, 2-3 parts of auxiliary agent, 30-40 parts of polyamide 650, 10-15 parts of triethanolamine.

[0007] As a further improvement of the present invention, the rust-inhibiting pigment includes graphene oxide and zinc powder with a mass ratio of 1.5:8.5.

[0008] As a further improvement of the present invention, the auxiliary agent includes a silane coupling agent, a wetting and dispersing agent, an antifoaming agent, a leveling agent and a thixotropic agent with a mass ratio of 1:0.5-1:0.5-1:0.5-1:0.5-1.

[0009] As a further improvement of the present invention, the silane coupling agent is γ-glycidoxypropyltrimethoxysilane;

[0010] The wetting and dispersing agent is BYK-110;

[0011] The antifoaming agent is BYK-065;

[0012] The leveling agent is PV88;

[0013] The thixotropic agent is fumed silica.

[0014] As a further improvement of the present invention, the preparation method of the organosilicon polyurethane modified epoxy resin is as follows:

[0015] (1) Add hydrogen-terminated silicone oil and trimethylolpropane diallyl ether to isopropanol solvent. The amount of isopropanol solvent is 30% of the total mass of the mixture. Add 0.2 wt% of platinum catalyst based on the total mass of the mixture. Under stirring conditions, heat up to 75 - 80 °C and react for 2 - 3 h. Then, dropwise add allyl glycidyl ether and continue to react for 2 h. Remove the solvent under reduced pressure to obtain reaction product 1.

[0016] (2) Add diisocyanate to xylene solvent. The amount of xylene solvent is 60% of the total mass of the mixture. Under nitrogen protection, stir and heat up to 65 - 70 °C, then add polyether diol and heat up to 75 - 80 °C and react for 3 - 5 h to obtain a polyurethane prepolymer with terminal isocyanate groups.

[0017] (3) Add the reaction product 1 from step (1) to the isocyanate-terminated polyurethane prepolymer from step (2). The mass ratio of the polyurethane prepolymer to the reaction product 1 is 5:2 - 3. Then, add 0.1 wt% of dibutyltin dilaurate as a catalyst based on the total mass of the mixture, and continue to stir and react for 3 h. Remove the solvent under reduced pressure to obtain the organosilicon polyurethane modified epoxy resin.

[0018] As a further improvement of the present invention, the molar ratio of the hydrogen-terminated silicone oil, trimethylolpropane diallyl ether, and allyl glycidyl ether is 2 - 2.5:1:2.

[0019] As a further improvement of the present invention, the diisocyanate is hexamethylene diisocyanate (HDI), and the polyether polyol is polytetrahydrofuran diol.

[0020] As a further improvement of the present invention, the molar ratio of the diisocyanate to the polyether diol is 1.6 - 2:1.

[0021] As a further improvement of the present invention, the preparation method of the organosilicon oligomer containing multiple epoxy groups is as follows: Mix dimethyldimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, and water in a molar ratio of 3:1:5, add them to 50% of ethanol solvent based on the weight of the mixture, add hydrochloric acid with a concentration of 36% to adjust the pH value to 3 - 4, stir and heat up to 50 - 60 °C, react for 3 - 4 h, add 15% of epoxypropanol based on the total weight of dimethyldimethoxysilane and γ-glycidoxypropylmethyldimethoxysilane, continue to react for 2 h, and remove the solvent under reduced pressure to obtain the organosilicon oligomer containing multiple epoxy groups.

[0022] A preparation method of a high-toughness and long-lasting anti-corrosion coating material for steel structures, comprising the following preparation steps:

[0023] (1) Mix epoxy resin, organosilicon polyurethane-modified epoxy resin, organosilicon oligomer containing multiple epoxy groups, polypropylene glycol diglycidyl ether, titanium dioxide, anti-rust pigment, mica iron oxide gray and additives evenly to obtain component A;

[0024] (2) Mix polyamide 650 and triethanolamine evenly to obtain component B;

[0025] (3) Mix component A and component B and react to obtain the anti-corrosion coating material.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention utilizes the addition reaction of terminal hydrogen-containing silicone oil, trimethylolpropane diallyl ether, and allyl glycidyl ether under the action of a platinum catalyst to obtain a reaction product containing multiple hydroxyl groups and epoxy groups at the molecular end. The multiple hydroxyl groups of this reaction product react with a low-molecular-weight linear polyurethane prepolymer containing terminal isocyanate to obtain an organosilicon polyurethane-modified epoxy resin. At the same time, dimethyldimethoxysilane, γ-glycidyletheroxypropylmethyldimethoxysilane and epichlorohydrin undergo a condensation reaction under acidic conditions to obtain an organosilicon oligomer with multiple epoxy groups at the end and side chains. The epoxy resin, organosilicon polyurethane-modified epoxy resin, and organosilicon oligomer containing multiple epoxy groups form a crosslinked network during the curing process. Polyurethane and organosilicon segments are introduced into the system, significantly improving the toughness and UV resistance of the epoxy resin and ensuring good adhesion performance of the coating material.

[0028] The present invention introduces organosilicon segments through organosilicon polyurethane-modified epoxy resin and introduces organosilicon segments into the crosslinked network through an organosilicon oligomer containing multiple epoxy groups, increasing the content of organosilicon segments in the system and further improving the UV resistance of the coating material.

[0029] The present invention further enhances the stability, impact resistance and anti-corrosion properties of the coating material by adding anti-rust pigments such as mica iron oxide gray, graphene oxide, and zinc powder. Specific Embodiments

[0030] The following further illustrates the specific embodiments of the present invention with reference to the examples.

[0031] Example 1

[0032] By mass fraction, the formulation of the anti-corrosion coating material is as follows: 15 parts of epoxy resin E44, 10 parts of silicone polyurethane modified epoxy resin, 5 parts of silicone oligomer containing multiple epoxy groups, 10 parts of polypropylene glycol diglycidyl ether, 4 parts of titanium dioxide, 5 parts of anti-rust pigment, 15 parts of mica iron oxide gray, 2 parts of additives, 32 parts of polyamide 650, and 10 parts of triethanolamine.

[0033] Among them, the anti-rust pigment includes graphene oxide and zinc powder with a mass ratio of 1.5:8.5. The additives include silane coupling agent, wetting and dispersing agent, defoaming agent, leveling agent, and thixotropic agent with a mass ratio of 1:0.5:0.5:0.8:1. The wetting and dispersing agent is selected as BYK-110; the defoaming agent is selected as BYK-065; the leveling agent is selected as PV88; the thixotropic agent is selected as fumed silica.

[0034] The preparation method of the silicone polyurethane modified epoxy resin is as follows:

[0035] (1) Add hydrogen-terminated silicone oil and trimethylolpropane diallyl ether into isopropanol solvent. The amount of xylene solvent is 30% of the total mass of the mixture. Add 0.2 wt% of platinum catalyst based on the total weight of the mixture. Under stirring conditions, heat up to 75 - 80 °C and react for 2 - 3 h. Then, dropwise add allyl glycidyl ether and continue to react for 2 h. Remove the solvent under reduced pressure to obtain reaction product 1. Among them, the molar ratio of hydrogen-terminated silicone oil, trimethylolpropane diallyl ether, and allyl glycidyl ether is 2:1:2;

[0036] (2) Add hexamethylene diisocyanate (HDI) into xylene solvent. The amount of xylene solvent is 60% of the total mass of the mixture. Under nitrogen protection, stir and heat up to 65 - 70 °C. Then, add polytetrahydrofuran diol. The molar ratio of diisocyanate to polyether diol is 1.6:1. Heat up to 75 - 80 °C and react for 3 - 5 h to obtain a polyurethane prepolymer with terminal isocyanate groups;

[0037] (3) Add reaction product 1 from step (1) to the isocyanate-terminated polyurethane prepolymer in step (2). The mass ratio of the polyurethane prepolymer to reaction product 1 is 5:2. Then, add 0.1 wt% of catalyst dibutyltin dilaurate based on the total mass of the mixture and continue to stir and react for 3 h. Remove the solvent under reduced pressure to obtain the silicone polyurethane modified epoxy resin.

[0038] The preparation method of the silicone oligomer containing multiple epoxy groups is as follows:

[0039] Mix dimethyldimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane and water in a molar ratio of 3:1:5, add them to 50% by weight of ethanol solvent in the mixture, add hydrochloric acid with a concentration of 36% to adjust the pH value to 3-4, stir and heat up to 50-60 °C, react for 3-4 h, add 15% by weight of glycidol based on the total mass of dimethyldimethoxysilane and γ-glycidoxypropylmethyldimethoxysilane, continue to react for 2 h, and carry out vacuum distillation to obtain an organosilicon oligomer containing multiple epoxy groups.

[0040] The preparation method of the anticorrosive coating material is as follows:

[0041] (1) Mix epoxy resin, organosilicon polyurethane modified epoxy resin, organosilicon oligomer containing multiple epoxy groups, polypropylene glycol diglycidyl ether, titanium dioxide, rust-inhibiting pigment, mica iron oxide gray and additives evenly to obtain Component A;

[0042] (2) Mix polyamide 650 and triethanolamine evenly to obtain Component B;

[0043] (3) Mix Component A and Component B and carry out a reaction to obtain the anticorrosive coating material.

[0044] Example 2

[0045] By mass, the formula of the anticorrosive coating material is as follows: 15 parts of epoxy resin, 15 parts of organosilicon polyurethane modified epoxy resin, 5 parts of organosilicon oligomer containing multiple epoxy groups, 10 parts of polypropylene glycol diglycidyl ether, 4 parts of titanium dioxide, 5 parts of rust-inhibiting pigment, 15 parts of mica iron oxide gray, 2 parts of additives, 35 parts of polyamide 650, and 10 parts of triethanolamine.

[0046] The preparation method of the polyurethane organosilicon modified epoxy resin is the same as that in Example 1.

[0047] The preparation method of the organosilicon oligomer containing multiple epoxy groups is the same as that in Example 1.

[0048] The preparation method of the anticorrosive coating material is the same as that in Example 1.

[0049] Example 3

[0050] By mass, the formula of the anticorrosive coating material is as follows: 20 parts of epoxy resin, 15 parts of organosilicon polyurethane modified epoxy resin, 10 parts of organosilicon oligomer containing multiple epoxy groups, 15 parts of polypropylene glycol diglycidyl ether, 6 parts of titanium dioxide, 5 parts of rust-inhibiting pigment, 20 parts of mica iron oxide gray, 3 parts of additives, 40 parts of polyamide 650, and 15 parts of triethanolamine.

[0051] Among them, the anti-rust pigment includes graphene oxide and zinc powder with a mass ratio of 1.5:8.5. The additives include a silane coupling agent, a wetting and dispersing agent, an anti-foaming agent, a leveling agent, and a thixotropic agent with a mass ratio of 1:0.5:0.5:0.8:1. The wetting and dispersing agent is selected as BYK-110; the anti-foaming agent is selected as BYK-065; the leveling agent is selected as PV88; the thixotropic agent is selected as fumed silica.

[0052] The preparation method of the organosilicon polyurethane-modified epoxy resin is as follows:

[0053] (1) Add the hydrogen-terminated silicone oil and trimethylolpropane diallyl ether into the isopropanol solvent. The dosage of the xylene solvent is 30% of the mass of the mixture. Add 0.2 wt% of the platinum catalyst based on the total mass of the mixture. Under stirring conditions, heat up to 75 - 80 °C and react for 2 - 3 h. Then, dropwise add allyl glycidyl ether and continue to react for 2 h. Remove the solvent under reduced pressure to obtain the reaction product 1. Among them, the molar ratio of the hydrogen-terminated silicone oil, trimethylolpropane diallyl ether, and allyl glycidyl ether is 2.5:1:2;

[0054] (2) Add hexamethylene diisocyanate (HDI) into the xylene solvent. The dosage of the xylene solvent is 60% of the weight of the mixture. Under nitrogen protection, stir and heat up to 65 - 70 °C. Then, add polytetrahydrofuran diol. The molar ratio of the diisocyanate to the polyether diol is 2:1. Heat up to 75 - 80 °C and react for 3 - 5 h to obtain the isocyanate-terminated polyurethane prepolymer;

[0055] (3) Add the reaction product 1 from step (1) to the isocyanate-terminated polyurethane prepolymer from step (2). The mass ratio of the polyurethane prepolymer to the reaction product 1 is 5:3. Then, add 0.1 wt% of the catalyst dibutyltin dilaurate based on the total mass of the mixture. Continue to stir and react for 3 h. Remove the solvent under reduced pressure to obtain the organosilicon polyurethane-modified epoxy resin.

[0056] The preparation method of the organosilicon oligomer containing multiple epoxy groups is as follows:

[0057] Mix dimethyldimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane and water in a molar ratio of 3:1:5. Add them into 50% of the ethanol solvent based on the weight of the mixture. Adjust the pH value to 3 - 4 by adding 36% hydrochloric acid. Stir and heat up to 50 - 60 °C and react for 3 - 4 h. Add 15% of glycidol based on the total weight of dimethyldimethoxysilane and γ-glycidoxypropylmethyldimethoxysilane, and continue to react for 2 h. Then, perform vacuum distillation to obtain the organosilicon oligomer containing multiple epoxy groups.

[0058] Comparative Example 1

[0059] By mass fraction, the formulation of the anti-corrosion coating material is as follows: 15 parts of epoxy resin E44, 5 parts of organosilicon oligomer containing multiple epoxy groups, 10 parts of polypropylene glycol diglycidyl ether, 4 parts of titanium dioxide, 5 parts of anti-rust pigment, 20 parts of micaceous iron oxide grey, 1 part of additive, 23 parts of polyamide 650, and 10 parts of triethanolamine.

[0060] Among them, the anti-rust pigment includes graphene oxide and zinc powder with a mass ratio of 1.5:8.5. The additive includes silane coupling agent, wetting and dispersing agent, defoaming agent, leveling agent, and thixotropic agent with a mass ratio of 1:0.5:0.5:0.8:1. The wetting and dispersing agent is selected as BYK-110; the defoaming agent is selected as BYK-065; the leveling agent is selected as PV88; the thixotropic agent is selected as fumed silica.

[0061] The preparation method of the organosilicon oligomer containing multiple epoxy groups is the same as that in Example 1.

[0062] The preparation method of the anti-corrosion coating material is as follows:

[0063] (1) Mix epoxy resin, organosilicon oligomer containing multiple epoxy groups, polypropylene glycol diglycidyl ether, titanium dioxide, anti-rust pigment, micaceous iron oxide grey, and additive evenly to obtain Component A;

[0064] (2) Mix polyamide 650 and triethanolamine evenly to obtain Component B;

[0065] (3) Mix Component A and Component B and react to obtain the anti-corrosion coating material.

[0066] Comparative Example 2

[0067] By mass fraction, the formulation of the anti-corrosion coating material is as follows: 15 parts of epoxy resin E44, 10 parts of polypropylene glycol diglycidyl ether, 4 parts of titanium dioxide, 2 parts of anti-rust pigment, 20 parts of micaceous iron oxide grey, 2 parts of additive, 20 parts of polyamide 650, and 10 parts of triethanolamine.

[0068] Among them, the anti-rust pigment includes graphene oxide and zinc powder with a mass ratio of 1.5:8.5. The additive includes silane coupling agent, wetting and dispersing agent, defoaming agent, leveling agent, and thixotropic agent with a mass ratio of 1:0.5:0.5:0.8:1. The wetting and dispersing agent is selected as BYK-110; the defoaming agent is selected as BYK-065; the leveling agent is selected as PV88; the thixotropic agent is selected as fumed silica.

[0069] The preparation method of the anti-corrosion coating material is as follows:

[0070] (1) Mix epoxy resin, polypropylene glycol diglycidyl ether, titanium dioxide, anti-rust pigment, micaceous iron oxide grey, and additive evenly to obtain Component A;

[0071] (2) Mix polyamide 650 and triethanolamine evenly to obtain Component B;

[0072] (3) Mix Component A and Component B and react to obtain the anticorrosive coating material.

[0073] Perform performance tests on the anticorrosive coating materials with different formulations in Examples 1-3 and Comparative Examples 1-2 above, and the results are shown in Table 1.

[0074] Test the adhesion of the coating according to the cross-cut method of ISO-2409;

[0075] Test the pencil hardness of the coating according to GB / T6739-2020;

[0076] Test the flexibility of the coating according to GB / T 1731-2020;

[0077] Test the impact resistance of the coating according to GB / T 1732-2020;

[0078] Test the resistance to artificial weathering of the coating according to GB / T 14522-2008;

[0079] Test the salt spray resistance of the coating according to GB / T 1771-2007.

[0080] Table 1

[0081]

[0082] It can be seen from Examples 1-3 and Comparative Examples 1-2 that the anticorrosive coating material of the present invention has good adhesion, hardness and salt spray resistance, and its impact resistance and resistance to artificial weathering are significantly better than those of Comparative Examples 1-2.

[0083] By adding a certain amount of organosilicon polyurethane modified epoxy resin and organosilicon oligomers with multiple epoxy groups at the ends and side chains, the present invention utilizes the cross-linking of epoxy resin, organosilicon polyurethane modified epoxy resin, and organosilicon oligomers with multiple epoxy groups during the curing process to form a cross-linked network, thereby introducing polyurethane and organosilicon segments into the system, significantly improving the toughness and UV resistance of the epoxy resin, and ensuring good adhesion performance of the coating material.

[0084] The present invention introduces organosilicon segments through organosilicon polyurethane modified epoxy resin, and introduces organosilicon segments into the cross-linked network through organosilicon oligomers with multiple epoxy groups, so that the content of organosilicon segments in the system is increased, and further improves the UV resistance of the coating material.

[0085] The present invention further enhances the stability, impact resistance and anticorrosion of the coating material by adding rust-inhibiting pigments such as mica iron oxide gray, graphene oxide, and zinc powder.

[0086] The above description is a detailed description of the preferred and feasible embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications made under the technical spirit disclosed by the present invention shall fall within the scope of the patent covered by the present invention.

Claims

1. A high-toughness long-lasting anti-corrosion coating material for steel structures, characterized in that Comprising by mass parts: 15 - 20 parts of epoxy resin, 10 - 15 parts of organosilicon polyurethane modified epoxy resin, 5 - 10 parts of organosilicon oligomer containing multiple epoxy groups, 10 - 15 parts of polypropylene glycol diglycidyl ether, 4 - 6 parts of titanium dioxide, 5 - 10 parts of anti-rust pigment, 10 - 20 parts of mica iron oxide gray, 2 - 3 parts of additives, 30 - 40 parts of polyamide 650, 10 - 15 parts of triethanolamine.

2. The high-toughness long-acting steel structure anti-corrosion coating material according to claim 1, characterized in that The anti-rust pigment includes graphene oxide and zinc powder with a mass ratio of 1.5:8.

5.

3. A high-toughness long-lasting steel structure anti-corrosion coating material according to claim 1, characterized in that, The additives include a silane coupling agent, a wetting and dispersing agent, an anti-foaming agent, a leveling agent, and a thixotropic agent with a mass ratio of 1:0.5 - 1:0.5 - 1:0.5 - 1:0.5 - 1.

4. The high-toughness long-acting steel structure anti-corrosion coating material according to claim 3, characterized in that, The silane coupling agent is γ-glycidoxypropyltrimethoxysilane; The wetting and dispersing agent is BYK-110; The anti-foaming agent is BYK-065; The leveling agent is PV88; The thixotropic agent is fumed silica.

5. A high-toughness long-lasting steel structure anti-corrosion coating material according to claim 1, characterized in that The preparation method of the organosilicon polyurethane modified epoxy resin is as follows: (1) Add hydrogen-terminated silicone oil and trimethylolpropane diallyl ether into isopropanol solvent, the amount of isopropanol solvent is 30% of the total mass of the mixture, add 0.2 wt% of platinum catalyst based on the total mass of the mixture, heat up to 75 - 80 °C under stirring conditions, react for 2 - 3 h, then dropwise add allyl glycidyl ether and continue to react for 2 h, remove the solvent under reduced pressure to obtain reaction product 1; (2) Add diisocyanate into xylene solvent, the amount of xylene solvent is 60% of the total mass of the mixture, stir and heat up to 65 - 70 °C under nitrogen protection, then add polyether diol, heat up to 75 - 80 °C and react for 3 - 5 h to obtain a polyurethane prepolymer with terminal isocyanate groups; (3) Add the reaction product 1 in step (1) to the isocyanate-terminated polyurethane prepolymer in step (2), the mass ratio of the polyurethane prepolymer to the reaction product 1 is 5:2 - 3, then add 0.1 wt% of catalyst dibutyltin dilaurate based on the total mass of the mixture, continue to stir and react for 3 h, remove the solvent under reduced pressure to obtain the organosilicon polyurethane modified epoxy resin.

6. A high-toughness long-lasting steel structure anti-corrosion coating material according to claim 5, characterized in that The molar ratio of the hydrogen-terminated silicone oil, trimethylolpropane diallyl ether, and allyl glycidyl ether is 2 - 2.5:1:

2.

7. A high-toughness long-lasting steel structure anti-corrosion coating material according to claim 5, characterized in that The diisocyanate is hexamethylene diisocyanate (HDI), and the polyether polyol is polytetrahydrofuran diol.

8. An anti-corrosion coating material for high-toughness and long-lasting steel structures according to claim 5, characterized in that, The molar ratio of the diisocyanate to the polyether diol is 1.6 - 2:

1.

9. A high-toughness long-lasting steel structure anti-corrosion coating material according to claim 1, characterized in that, The preparation method of the organosilicon oligomer containing multiple epoxy groups is as follows: Mix dimethyldimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane and water in a molar ratio of 3:1:5, add 50% of ethanol solvent based on the weight of the mixture, add hydrochloric acid with a concentration of 36% to adjust the pH value to 3 - 4, stir and heat up to 50 - 60 °C, react for 3 - 4 h, add 15% of epoxy propanol based on the total weight of dimethyldimethoxysilane and γ-glycidoxypropylmethyldimethoxysilane, continue to react for 2 h, remove the solvent under reduced pressure to obtain the organosilicon oligomer containing multiple epoxy groups.

10. The preparation method of a high-toughness long-lasting steel structure anti-corrosion coating material according to any one of claims 1-9, characterized in that, Including the following preparation steps: (1) Mix epoxy resin, organosilicon polyurethane modified epoxy resin, organosilicon oligomer containing multiple epoxy groups, polypropylene glycol diglycidyl ether, titanium dioxide, anti-rust pigment, micaceous iron oxide gray and additives evenly to obtain Component A; (2) Mix polyamide 650 and triethanolamine evenly to obtain Component B; (3) Mix Component A and Component B and carry out a reaction to obtain an anti-corrosion coating material.

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