Environment-friendly weather-resistant polyurea bird damage prevention insulating paint based on transgenic soybean oil polyamine and preparation method and coating of environment-friendly weather-resistant polyurea bird damage prevention insulating paint

Abstract

The invention relates to the technical field of high polymer materials, and discloses an environment-friendly weather-resistant polyurea bird damage prevention insulating paint based on transgenic soybean oil polyamine, and a preparation method and a coating of the environment-friendly weather-resistant polyurea bird damage prevention insulating paint. The coating contains a component A and a component B, wherein the raw materials for preparing the component A comprise aliphatic isocyanate, a chain extender, an organic bismuth catalyst and a diluent; the component B is prepared from the following raw materials: transgenic soybean oil-based polyamine, a nano modifier, a thixotropic agent, an anti-aging agent and water. Through bio-based raw material innovation, weather-proof structure design, an insulation enhancement technology and a rapid curing system, the finally obtained coating not only has a good insulation effect, but also has a good bird damage prevention effect.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to an environmentally friendly, weather-resistant polyurea bird-proof insulating coating based on genetically modified soybean oil polyamines, its preparation method, and the coating itself. Background Technology

[0002] With the deepening implementation of the national ecological restoration strategy, bird activity along power transmission corridors is becoming increasingly frequent. Bird damage not only harms power equipment but can also lead to power outages and fires. Traditional bird-proof coatings mostly use epoxy resins or silicone materials, which have the following drawbacks: insufficient environmental friendliness: solvent-based systems contain high VOCs, and curing agents contain benzene or heavy metal components; poor weather resistance: aromatic polyurea is prone to yellowing, and its mechanical properties degrade significantly after ultraviolet radiation; low utilization rate of bio-based materials: high dependence on petroleum-based raw materials, which does not meet the needs of sustainable development; complex construction process: two-component polyurea requires specialized equipment, and single-component polyurea has poor storage stability.

[0003] Chinese patent application CN120699526A discloses an insulating coating for preventing bird damage and foreign object overlap, and its preparation method. This invention provides an insulating coating for preventing bird damage and foreign object overlap, comprising the following raw materials in parts by weight: 55-80 parts of methylsilane-modified polyurethane liquid, 23-40 parts of polyamide fiber nanopowder, 10-20 parts of organosilicon-modified calcium lignosulfonate suspension, 8-10 parts of hydrophobic silica, 2-5 parts of leveling agent, 1-2 parts of pigment, 3-5 parts of anti-aging agent, and 10-15 parts of diluent. This coating exhibits extremely high insulation performance, with a withstand voltage of 40kV or higher per millimeter, while conventional insulating coatings typically have a withstand voltage of 18kV per millimeter. Furthermore, the insulating coating itself has high strength, good toughness, and excellent hydrophobicity and hydrophobic migration properties. However, this coating has limitations in weather resistance and anti-aging properties, and its long-term performance may degrade.

[0004] Chinese patent application CN118325438A discloses an insulating coating for AC / DC filters to prevent bird damage, a coating layer, and a method for preparing the same. The insulating coating, by weight, comprises the following components: 30-35% polyurethane resin, 26-30% epoxy resin, 10-15% nano-ceramic powder, 5-10% inorganic filler, 23% conductive carbon black, 12% UV stabilizer, 12% flame retardant, with the remainder being solvent. The beneficial effects are: the addition of conductive carbon black to the coating improves its conductivity to a certain extent, ensuring that the coating maintains a certain level of conductivity under specific conditions and preventing static electricity accumulation. However, the long-term weather resistance and flame retardancy of this coating may be insufficient. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems existing in the prior art and to provide an environmentally friendly, weather-resistant polyurea bird-proof insulating coating based on genetically modified soybean oil polyamines, as well as its preparation method and coating. This invention solves the problems of long curing time, insufficient environmental protection, and insufficient insulation strength of existing bird-proof coatings by combining insulation protection, and achieves an innovative breakthrough in the technical route.

[0006] To achieve the above objectives, the present invention provides an environmentally friendly, weather-resistant polyurea bird-proof insulating coating based on genetically modified soybean oil polyamines, the coating containing component A (isocyanate prepolymer) and component B (amine-based curing system). The raw materials used to prepare component A include aliphatic isocyanate, chain extender, organobismuth catalyst, and diluent. The aliphatic isocyanate, as the core curing agent of component A, undergoes a cross-linking reaction with the hydroxyl compound of component B to construct a polyurethane network structure, imparting weather resistance, mechanical strength, and electrical insulation properties to the insulating coating. The chain extender connects the aliphatic isocyanate to the matrix resin molecular chains, increasing the cross-linking density of the coating and improving the flexibility, adhesion, and crack resistance of the insulating coating. The organobismuth catalyst efficiently catalyzes the curing reaction between isocyanate and hydroxyl groups, reducing the curing temperature and shortening the curing time. It is also environmentally friendly and free of heavy metal toxicity, ensuring the stability of the coating performance. The diluent adjusts the viscosity of component A to a suitable application range, improving the leveling properties during spraying and brushing. It does not participate in the curing reaction; its volatilization or slight residue after curing does not affect the insulation performance of the coating.

[0007] The raw materials used to prepare component B contain genetically modified soybean oil-based polyamine, nano-modifier, thixotropic agent, anti-aging agent, and water. Among them, genetically modified soybean oil-based polyamine, as a raw material for insulating coatings, has the advantages of being renewable and cost-effective as a biomass-based raw material. Its molecular structure can improve the coating's flexibility, crack resistance, and substrate adhesion. It has excellent insulation properties and good compatibility with other components of the coating. The reaction rate is controllable, and it can be seamlessly adapted to existing preparation and electrostatic spraying processes. It can also give the coating good hydrolysis resistance and weather resistance, making it suitable for the service conditions of outdoor power equipment.

[0008] In this invention, the weight ratio of component A to component B is 1:1.2-1.5.

[0009] Preferably, the aliphatic isocyanate is hexamethylene diisocyanate trimer (HDI trimer) and / or isophorone diisocyanate (IPDI).

[0010] In this invention, the chain extender is a hydroxyl-terminated polytetrahydrofuran (PTMG, also known as polytetrahydrofuran diol or polytetramethylene ether diol); in one specific embodiment, the number-average molecular weight Mn of the hydroxyl-terminated polytetrahydrofuran is 2000.

[0011] In a specific embodiment of the present invention, the organic bismuth catalyst used is BICAT® WS8.

[0012] In this invention, the diluent is a divalent ester (DBE, which is an environmentally friendly, high-solubility ester mixed diluent suitable for insulating coatings such as methyl silicone resin, with the core being an industrial mixed ester of dimethyl glutarate, dimethyl succinate, and dimethyl adipate).

[0013] In a preferred embodiment, the genetically modified soybean oil-based polyamine of the present invention is prepared by ring-opening reaction of epoxidized soybean oil and diethylenetriamine, with a hydroxyl value of 150-200 mgKOH / g.

[0014] The nanomodifiers described in this invention are boron nitride nanosheets (BNNS) and / or hydrophobic fumed silica.

[0015] The thixotropic agent is a polyamide wax; the anti-aging agent contains the hindered amine light stabilizer HALS 770 (chemical name: bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate) and the ultraviolet absorber UV-327 (benzotriazole UV absorber).

[0016] In a preferred embodiment, based on the total weight of aliphatic isocyanate, chain extender, organobismuth catalyst and diluent as 100%, the content of aliphatic isocyanate is 50-70%, the content of chain extender is 20-30%, the content of organobismuth catalyst is 0.1-0.5%, and the content of diluent is 9.5-20%.

[0017] Preferably, based on the total weight of genetically modified soybean oil-based polyamine, nano-modifier, thixotropic agent, anti-aging agent, and water as 100%, the content of genetically modified soybean oil-based polyamine is 60-80%, the content of nano-modifier is 3-5%, the content of thixotropic agent is 1-3%, the content of anti-aging agent is 2-4%, and the balance is water.

[0018] A second aspect of this invention provides a method for preparing the above-mentioned environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines, comprising: Aliphatic isocyanate and chain extender are mixed and reacted, then mixed with organic bismuth catalyst and diluent, and degassed to obtain component A; Epoxidized soybean oil and diethylenetriamine were subjected to a ring-opening reaction under the catalysis of BF3·Et2O. After purification by vacuum distillation, genetically modified soybean oil-based polyamine was obtained. The genetically modified soybean oil-based polyamine, nano-modifier, thixotropic agent, anti-aging agent and water were mixed and sieved to obtain component B.

[0019] In this invention, aliphatic isocyanate and chain extender are mixed and reacted at 60-80°C until the -NCO content in the system is 12-16%.

[0020] In this invention, the molar ratio of epoxidized soybean oil to diethylenetriamine is 1:2-4.

[0021] The weight ratio of BF3·Et2O to the total weight of epoxidized soybean oil and diethylenetriamine is 0.5-2:100.

[0022] Preferably, the conditions for the ring-opening reaction include: a temperature of 70-90°C and a time of 2-4 hours. In a specific implementation, the vacuum distillation process is as follows: First, the reaction system is heated to 60~70℃, and the vacuum system is turned on to gradually evacuate to -0.07~-0.08MPa, while continuously stirring to remove easily volatile light components; then, the temperature is raised to 75~85℃, and the vacuum degree is increased to -0.09~-0.095MPa, and vacuum distillation is carried out for 2~3 hours until no distillate is distilled off; low-speed stirring is used throughout the process to prevent local overheating of the system.

[0023] In a preferred embodiment, the genetically modified soybean oil-based polyamine, nano-modifier, thixotropic agent, anti-aging agent and water are mixed and dispersed at high speed at 3000 rpm for 30 min, and then passed through a 100-300 mesh sieve to obtain component B.

[0024] A third aspect of this invention provides an environmentally friendly, weather-resistant polyurea bird-proof insulating coating. This coating is prepared using the aforementioned environmentally friendly, weather-resistant polyurea bird-proof insulating paint based on genetically modified soybean oil polyamines. The preparation method includes: After mixing components A and B, the mixture is sprayed onto the surface of the transmission line and cured to obtain an environmentally friendly, weather-resistant polyurea bird-proof insulating coating.

[0025] In this invention, the power transmission line includes not only power transmission lines, but also electrical equipment such as substation switch porcelain bushings.

[0026] Components A and B must be stored in a sealed environment at 5-35℃. Stir them thoroughly separately before use, completing the mixing process within 5-10 seconds to prevent premature gelation and inactivation. After curing, a visual inspection is required to confirm that the coating surface is smooth and free of defects such as bubbles, cracks, and missed areas. Simultaneously, random checks of coating adhesion and insulation performance are conducted to ensure compliance with bird protection and electrical safety requirements for power transmission lines. Only after passing these checks can the coating be put into use.

[0027] The viscosity of the system after mixing components A and B is ≤500 mPa·s (25℃), the pot life is ≥30 min (i.e., construction must begin within 30 minutes; the pot life refers to the longest time that the multi-component coating can maintain its designed construction performance (viscosity, leveling, atomization, etc.) under standard environmental conditions after being mixed in the specified proportions. If this time is exceeded, the coating will gel, thicken or even solidify due to cross-linking reaction, and construction will not be possible), the surface drying time is ≤5 min, and the complete curing time is 5-60 min.

[0028] In this invention, the curing process can be performed by standing at room temperature for 30 minutes or baking at 60°C for 10 minutes.

[0029] The room temperature in this invention refers to 20-30℃.

[0030] Preferably, the insulation strength of the environmentally friendly and weather-resistant polyurea bird-proof insulating coating is ≥22 kV / mm.

[0031] Compared with the prior art, the present invention has the following beneficial effects: 1. Innovation in bio-based raw materials: For the first time, genetically modified soybean oil-derived polyamines are used to replace petroleum-based amines, achieving a bio-carbon content of over 60% and reducing carbon emissions.

[0032] 2. Weather-resistant structural design: The synergistic effect of aliphatic isocyanate and benzotriazole UV absorber breaks through the traditional weather resistance limit of polyurea.

[0033] 3. Insulation enhancement technology: The nano-modifiers are oriented to form a dual-function network of insulation and thermal conductivity, which increases the insulation strength by 30%.

[0034] 4. Rapid curing system: The organic bismuth catalyst and DBE diluent are used together to achieve controllable curing in 5-30 minutes, balancing construction efficiency and coating performance. Detailed Implementation

[0035] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0036] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0037] The present invention will be described in detail below through embodiments. Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods in the art.

[0038] The number-average molecular weight (Mn) of the hydroxyl-terminated polytetrahydrofurans used in the following examples was 2000, purchased from BASF under the brand name PolyTHF® 2000; the divalent esters were purchased from DuPont.

[0039] In the following examples, room temperature refers to 25°C.

[0040] Example 1 (1) Mix aliphatic isocyanate (HDI trimer) and chain extender (double-terminated hydroxyl polytetrahydrofuran), and react at 70°C until the -NCO content in the system is 12%. Then mix with organobismuth catalyst (BICAT® WS8) and diluent (DBE), and after degassing, obtain component A, which is then sealed and stored. Based on the total weight of aliphatic isocyanate, chain extender, organobismuth catalyst and diluent as 100%, the content of aliphatic isocyanate is 65%, the content of chain extender is 25%, the content of organobismuth catalyst is 0.5%, and the content of diluent is 9.5%. (2) Epoxidized soybean oil and diethylenetriamine (the molar ratio of epoxidized soybean oil to diethylenetriamine is 1:3) were reacted at 80°C for 3 hours under the catalysis of BF3·Et2O (the weight ratio of BF3·Et2O to the total weight of epoxidized soybean oil and diethylenetriamine is 1:100). After purification by vacuum distillation (the specific operation of vacuum distillation is as follows: first, the reaction system is heated to 65°C, the vacuum system is turned on and the vacuum is gradually evacuated to -0.07MPa, and the volatile light components are removed by continuous stirring; then the temperature is raised to 80°C, the vacuum degree is raised to -0.09MPa, and vacuum distillation is carried out for 3 hours until no distillate is distilled out; the system is stirred at low speed throughout to prevent local overheating), transgenic soybean oil-based polyamine was obtained with a hydroxyl value of 150 mgKOH / g. The transgenic soybean oil-based polyamine, nano-modifier (BNNS), thixotropic agent (polyamide wax), and anti-aging agent (hindered amine light stabilizer HALS) were then purified. 770 and UV absorber UV-327) were mixed with water and dispersed at 3000 rpm for 30 min. Then, the mixture was passed through a 200-mesh sieve and packaged to obtain component B. Based on the total weight of genetically modified soybean oil-based polyamine, nano-modifier, thixotropic agent, anti-aging agent and water as 100%, the content of genetically modified soybean oil-based polyamine was 75%, the content of nano-modifier was 4%, the content of thixotropic agent was 2%, the content of anti-aging agent was 3%, and the balance was water. (3) Mix component A and component B in a weight ratio of 1:1.3 and spray the mixture onto the surface of the power transmission line. After curing, an environmentally friendly and weather-resistant polyurea bird-proof insulating coating is obtained. The curing operation is to let it stand at room temperature for 30 min. Components A and B need to be stored in a sealed environment at 25℃. Before use, they should be stirred evenly and poured into a special mixing equipment according to the product specifications. The mixture should be fully mixed by a high-pressure airless sprayer. The mixing process should be completed within 10 seconds. The viscosity of the system after mixing components A and B is 500 mPa·s (25℃), the pot life is 30 min, the surface drying time is 5 min, and the complete curing time is 20 min (25℃).

[0041] The volume resistivity of the above-mentioned environmentally friendly and weather-resistant polyurea bird-proof insulating coating was tested according to GB / T 1410-2006; the insulation strength (dielectric strength) of the above-mentioned environmentally friendly and weather-resistant polyurea bird-proof insulating coating was tested according to GB / T 1408.1-2016. Testing showed that the volume resistivity of the environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating described in this embodiment is 1.8 × 10⁻⁶. 15 Ω·cm, insulation strength is 28 kV / mm.

[0042] Furthermore, the environmentally friendly, weather-resistant polyurea bird-proof insulating coating based on genetically modified soybean oil polyamines in this embodiment is applied to the protection of substation equipment: it is sprayed onto the porcelain bushing of the disconnector switch in a 500kV substation while energized. The specific operation is as follows: a fully insulated spray gun and supporting equipment (air compressor, storage tank, etc.) are used, and a double insulation layer is set between the spray gun handle and the nozzle to ensure the safe isolation of the operator from the energized body. Compressed air undergoes multi-stage filtration (first-stage filter removes particulate matter, second-stage refrigerated dryer dehydrates 80%) to ensure the spraying system is free of oil, water, and impurities, avoiding the risk of electric shock. During spraying, operators wear protective gear, including full-body insulating suits (EVA resin material, withstand voltage 27kV), insulating gloves (with withstand voltage matching the line voltage), and insulating boots, and grounding is used for equipotential protection. The ambient humidity during spraying is 78%, and the wind force is level 3. Live-line spraying of disconnector porcelain bushings must strictly adhere to electrical live-line work safety regulations. First, a safe working distance is determined based on the operating voltage. Operators wear full-body insulating protective gear, the spraying equipment is insulated and reliably grounded, and tools and materials are prepared. Then, a live-line cleaning agent (methyltriethoxysilane, resistivity ≥5×10⁻⁶) is used. 5(HP-113, purchased from Jiangxi Hongbai New Materials Co., Ltd.) Low-pressure spray cleaning of the porcelain bushing surface of the disconnecting switch (Ω·cm). After lightly wiping away surface dirt, ventilate until the cleaning agent completely evaporates. Cover conductive parts such as the flange and terminals of the disconnecting switch porcelain bushing with insulating tape beforehand. Mix components A and B according to the same procedure as above, and use compressed air spraying technology (pressure 5MPa) to achieve uniform atomization of the mixed material. The core is to use a spray gun to spray the atomized mixed material onto the cleaned porcelain bushing surface of the disconnecting switch. Control the spray gun to maintain a distance of 25cm and a 45° angle between it and the curved surface of the disconnecting switch porcelain bushing, and move the gun back and forth at a uniform speed from top to bottom, with each pass overlapping by 1 / 3. After curing, an environmentally friendly and weather-resistant polyurea bird-proof insulating coating is obtained (the spraying thickness and curing operation are the same as those for the above-mentioned transmission lines). According to statistics from the power operation and maintenance department, the environmentally friendly and weather-resistant polyurea bird-proof insulating coating on the disconnecting switch porcelain bushing can reduce the bird damage accident rate by 90%.

[0043] Example 2 (1) Mix aliphatic isocyanate (IPDI) and chain extender (double-terminated hydroxyl polytetrahydrofuran), and react at 60°C until the -NCO content in the system is 16%. Then mix with organobismuth catalyst (BICAT® WS8) and diluent (DBE), and after degassing, obtain component A, which is then sealed and stored. Based on the total weight of aliphatic isocyanate, chain extender, organobismuth catalyst and diluent as 100%, the content of aliphatic isocyanate is 60%, the content of chain extender is 30%, the content of organobismuth catalyst is 0.5%, and the content of diluent is 9.5%. (2) Epoxidized soybean oil and diethylenetriamine (molar ratio of epoxidized soybean oil to diethylenetriamine is 1:4) were subjected to ring-opening reaction at 70°C for 4 h under the catalysis of BF3·Et2O (the weight ratio of BF3·Et2O to the total weight of epoxidized soybean oil and diethylenetriamine is 2:100). After purification by vacuum distillation (the specific operation of vacuum distillation is: first heat the reaction system to 60°C, turn on the vacuum system and gradually evacuate to -0.07MPa, continuously stir to remove volatile light components; then heat to 85°C, increase the vacuum degree to -0.095MPa, keep warm and distill under vacuum for 2 h until no distillate is distilled out; low speed stirring throughout the process to prevent local overheating of the system), transgenic soybean oil-based polyamine was obtained with a hydroxyl value of 200 mgKOH / g. The transgenic soybean oil-based polyamine, nano-modifier (BNNS), thixotropic agent (polyamide wax), and anti-aging agent (hindered amine light stabilizer HALS) were then purified. 770 and UV absorber UV-327) were mixed with water and dispersed at 3000 rpm for 30 min. Then, the mixture was passed through a 200-mesh sieve and packaged to obtain component B. Based on the total weight of genetically modified soybean oil-based polyamine, nano-modifier, thixotropic agent, anti-aging agent and water as 100%, the content of genetically modified soybean oil-based polyamine was 80%, the content of nano-modifier was 4%, the content of thixotropic agent was 1%, the content of anti-aging agent was 4%, and the balance was water. (3) Mix component A and component B in a weight ratio of 1:1.5 and spray the mixture onto the surface of the power transmission line. After curing, an environmentally friendly and weather-resistant polyurea bird-proof insulating coating is obtained. The curing operation is to bake at 60°C for 10 min. Components A and B need to be stored in a sealed environment at 25°C. Before use, stir them evenly and pour them into a special mixing equipment according to the product specifications. Mix them thoroughly with a high-pressure airless sprayer. The mixing process needs to be completed within 10 seconds. The viscosity of the system after mixing components A and B is 500 mPa·s (25°C), the pot life is 40 min, the surface drying time is 5 min, and the complete curing time is 15 min (25°C).

[0044] The volume resistivity of the environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating described in this example was measured to be 1.6 × 10⁻⁶ using the same testing method as in Example 1. 15 Ω·cm, insulation strength 24 kV / mm.

[0045] Further following the procedure in Example 1, the environmentally friendly, weather-resistant polyurea bird-proof insulating coating based on genetically modified soybean oil polyamines from this example is applied to the protection of substation equipment. The environmentally friendly, weather-resistant polyurea bird-proof insulating coating on the porcelain bushing of the disconnecting switch can reduce the bird-damage accident rate by 85%.

[0046] As can be seen from the above results, the coating obtained by the present invention through the innovation of bio-based raw materials, weather-resistant structural design, insulation enhancement technology and rapid curing system not only has a good insulation effect, but also has a good bird protection effect.

[0047] It should be understood that any parts not described in detail in this specification belong to the prior art.

[0048] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines, characterized in that, This coating contains component A and component B; The raw materials used to prepare component A contain aliphatic isocyanate, chain extender, organic bismuth catalyst and diluent; The raw materials used to prepare component B contain genetically modified soybean oil-based polyamines, nano-modifiers, thixotropic agents, anti-aging agents, and water.

2. The environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines according to claim 1, characterized in that, The weight ratio of component A to component B is 1:1.2-1.

5.

3. The environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines according to claim 1 or 2, characterized in that, The aliphatic isocyanate is hexamethylene diisocyanate trimer and / or isophorone diisocyanate; The chain extender is a double-terminated hydroxyl polytetrahydrofuran; The diluent is a divalent ester.

4. The environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines according to claim 3, characterized in that, The genetically modified soybean oil-based polyamine was prepared by a ring-opening reaction of epoxidized soybean oil and diethylenetriamine, with a hydroxyl value of 150-200 mgKOH / g. The nano-modifier is boron nitride nanosheets and / or hydrophobic fumed silica; The thixotropic agent is a polyamide wax; The anti-aging agent contains the hindered amine light stabilizer HALS 770 and the ultraviolet absorber UV-327.

5. The environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines according to claim 1, characterized in that, Based on the total weight of aliphatic isocyanate, chain extender, organobismuth catalyst, and diluent as 100%, the content of aliphatic isocyanate is 50-70%, the content of chain extender is 20-30%, the content of organobismuth catalyst is 0.1-0.5%, and the content of diluent is 9.5-20%. Based on the total weight of genetically modified soybean oil-based polyamines, nano-modifiers, thixotropic agents, anti-aging agents, and water as 100%, the content of genetically modified soybean oil-based polyamines is 60-80%, the content of nano-modifiers is 3-5%, the content of thixotropic agents is 1-3%, the content of anti-aging agents is 2-4%, and the balance is water.

6. The preparation method of the environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines according to any one of claims 1-5, characterized in that, include: Aliphatic isocyanate and chain extender are mixed and reacted, then mixed with organic bismuth catalyst and diluent, and degassed to obtain component A; Epoxidized soybean oil and diethylenetriamine were subjected to a ring-opening reaction under the catalysis of BF3·Et2O. After purification by vacuum distillation, genetically modified soybean oil-based polyamine was obtained. The genetically modified soybean oil-based polyamine, nano-modifier, thixotropic agent, anti-aging agent and water were mixed and sieved to obtain component B.

7. The preparation method according to claim 6, characterized in that, Aliphatic isocyanate and chain extender are mixed and reacted at 60-80℃ until the -NCO content in the system is 12-16%.

8. The preparation method according to claim 6 or 7, characterized in that, The molar ratio of epoxidized soybean oil to diethylenetriamine is 1:2-4; The weight ratio of BF3·Et2O to the total weight of epoxidized soybean oil and diethylenetriamine is 0.5-2:100; The conditions for the ring-opening reaction include: a temperature of 70-90℃ and a time of 2-4 hours.

9. An environmentally friendly, weather-resistant polyurea bird-proof insulating coating, characterized in that, The environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating is prepared using the environmentally friendly, weather-resistant polyurea bird-damage-resistant insulating coating based on genetically modified soybean oil polyamines as described in any one of claims 1-5. The preparation method includes: After mixing components A and B, the mixture is sprayed onto the surface of the transmission line and cured to obtain an environmentally friendly, weather-resistant polyurea bird-proof insulating coating.

10. The environmentally friendly, weather-resistant polyurea bird-proof insulating coating according to claim 9, characterized in that, The insulation strength of the environmentally friendly and weather-resistant polyurea bird-proof insulating coating is ≥22 kV / mm.