High-pressure-resistant long-acting stable two-component insulating paint and preparation method thereof

Abstract

The invention relates to a high-pressure-resistant long-acting stable two-component insulating coating and a preparation method thereof, and belongs to the field of insulating material preparation, and the high-pressure-resistant long-acting stable two-component insulating coating is composed of a film-forming agent, an oxidizing agent, a reducing agent, a promoter, a nanofiller and a leveling agent. The film forming agent is prepared from dodecafluoroheptyl methacrylate, tridecafluorooctyl methacrylate, tridecafluorooctyl acrylate, laurate methacrylate and trimethylolpropane trimethacrylate. According to the coating, fluorine-containing acrylic resin is mainly used as a main film forming substance, a redox system curing agent is compounded to form a double-component coating, a certain amount of insulating filler and additives are added into the double-component coating, coating curing is initiated through free radical polymerization, and the insulating property of the double-component coating is improved.

Description

Technical Field

[0001] The invention belongs to the field of insulating material preparation, and in particular relates to a high-voltage-resistant, long-acting and stable two-component insulating coating. Background Art

[0002] There are a large number of overhead bare wires (pole openings, lightning arresters, linchpins, and parallel trench wire clamps) in the power distribution lines of the power grid, and the installation height is limited. They usually cross waters, forests, high-rise buildings, and densely populated areas, which are prone to accidents such as bird nest grounding tripping, accidental electric shock, and tree short circuit fires. Such accidents seriously affect the safe operation of the power grid and pose a great threat to the safety of people's lives and property. Therefore, it is of great practical significance to develop an insulating coating and spray it on exposed areas such as wires.

[0003] Existing patents such as CN118325399A propose an insulating coating for overhead high-voltage wires and a preparation method thereof, but a certain amount of conductive filler is added to the resin, so the insulation effect of the coating is poor; Patent CN116496695A proposes an insulating coating material for high-voltage transmission lines and a preparation method thereof, the coating uses trimethoxy-terminated polydimethylsiloxane of different viscosities as the main film-forming material, and forms an insulating material by adding additives of different contents, but the curing speed of the coating is slow, and it is greatly affected by environmental temperature and humidity factors, and is not suitable for outdoor applications. Patent CN118325399A proposes an insulating coating for overhead high-voltage wires and a preparation method thereof, the coating uses polytetrafluoroethylene resin with a certain hydroxyl value and curing agent isocyanate as the main film-forming material, the coating has certain self-cleaning, anti-snow, and high voltage resistance properties, but due to the poor adhesion of the coating system, the durability of the coating is not long. In summary, the existing technology has problems such as slow coating reaction speed, poor coating adhesion, and poor coating insulation effect. Summary of the invention

[0004] The present invention proposes a high-voltage, long-lasting and stable two-component insulation for high-voltage transmission lines. The coating mainly uses fluorine-containing acrylic resin as the main film-forming material, and is compounded with a redox system curing agent to form a two-component coating. A certain amount of insulating fillers and additives are added thereto, and the coating is cured by free radical polymerization to improve its insulation performance.

[0005] The technical solution adopted by the present invention is:

[0006] A high-voltage-resistant, long-lasting and stable two-component insulating coating is composed of a film-forming agent, an oxidant, a reducing agent, a promoter, a nano-filler and a leveling agent.

[0007] Furthermore, the film-forming agent is composed of dodecafluoroheptyl methacrylate, tridecafluorooctyl methacrylate, tridecafluorooctyl acrylate, lauric methacrylate, and trimethylolpropane trimethacrylate.

[0008] Furthermore, the film-forming agent comprises 20-40 parts by weight of dodecafluoroheptyl methacrylate, 30-50 parts by weight of tridecafluorooctyl methacrylate, 30-40 parts by weight of tridecafluorooctyl acrylate, 3-5 parts by weight of lauric methacrylate, and 2-4 parts by weight of trimethylolpropane trimethacrylate.

[0009] Furthermore, in the two-component insulating coating, the added amounts of the oxidant, the reductant, the promoter, the nanofiller and the leveling agent are 3-5 parts, 2.5-4 parts, 0.2-0.8 parts, 3-5 parts and 0.2-0.5 parts by mass respectively.

[0010] Furthermore, the oxidant is cumene hydroperoxide.

[0011] Furthermore, the reducing agent is triethylamine.

[0012] Furthermore, the co-promoter is cobalt naphthenate.

[0013] Furthermore, the nano filler is nano alumina.

[0014] Furthermore, the leveling agent is BYK-333.

[0015] Furthermore, the preparation method of the two-component insulating coating is as follows: first, the film-forming agent, nanofiller and leveling agent are evenly mixed, and then divided into component A1 and component B1 with equal mass; then, an oxidant is added to component A1 and mixed evenly to form component A2; then, a reducing agent and a promoter are added to component B1 and mixed evenly to form component B2; finally, components A2 and B2 are evenly mixed to form the two-component insulating coating; when in use, the two-component insulating coating is sprayed on the surface of the exposed area of ​​the high-voltage line, and initially cured for 30-50 minutes at room temperature to form a coating.

[0016] Beneficial effects of the present invention:

[0017] The present invention adopts dodecafluoroheptyl methacrylate, tridecafluorooctyl methacrylate, and tridecafluorooctyl acrylate, which contain fluorine in their molecular structures, and the cured coating has low surface energy, good weather resistance, and good hydrophobicity and insulation properties; methacrylate laurate is a viscosity regulator, which has the advantages of high boiling point and low odor, and can produce a good viscosity regulation effect on the coating; trimethylolpropane trimethacrylate has three functionalities, which can accelerate the curing speed of the coating and improve the strength of the coating (if fluorinated acrylate is used alone, the curing speed of the coating is slow, and the strength of the cured coating is low. The present invention adopts trimethylolpropane trimethacrylate, which has three functionalities, and under the joint action of an oxidant, a reducing agent, and an accelerator, the reaction speed can be increased, and the cured coating has high strength and good adhesion). Then, through the redox system, under the action of an accelerator, a room temperature reaction generates free radicals, which initiate a free radical polymerization curing reaction, and the addition of nano aluminum oxide can further improve the strength of the coating, while a leveling agent can reduce the surface tension of the coating, reduce the generation of shrinkage cavities, and make the coating surface uniform and flat.

[0018] Through the above reaction principle, the coating of the present invention has the advantages of strong weather resistance, fast reaction speed, strong coating adhesion, etc. DETAILED DESCRIPTION

[0019] Embodiment 1: First, 20 parts of dodecafluoroheptyl methacrylate, 30 parts of tridecafluorooctyl methacrylate, 30 parts of tridecafluorooctyl acrylate, 3 parts of methacrylate laurate, 2 parts of trimethylolpropane trimethacrylate, 3 parts of nano aluminum oxide, and 0.2 parts of leveling agent BYK-333 are mixed evenly and divided into A1 component and B1 component by equal weight, then 3 parts of oxidant cumene hydroperoxide are added to A1 component and mixed evenly to form A2 component, then 2.5 parts of triethylamine and 0.2 parts of cobalt naphthenate are added to B1 component and mixed evenly to form B2 component, finally, A2 component and B2 component are mixed evenly to form the two-component insulating coating; when used, the two-component insulating coating is sprayed on the surface of the exposed area of ​​the high-voltage line, and initially cured for 50 minutes at room temperature to form a coating. It is completely cured for 24 hours, and the insulating voltage resistance of the cured coating is 13.28KV.

[0020] Embodiment 2: First, 22 parts of 12-fluoroheptyl methacrylate, 35 parts of 13-fluorooctyl methacrylate, 32 parts of 13-fluorooctyl acrylate, 4 parts of methacrylate laurate, 3 parts of trimethylolpropane trimethacrylate, 3 parts of nano aluminum oxide, and 0.3 parts of leveling agent BYK-333 are mixed evenly and divided into A1 component and B1 component by equal weight, then 3 parts of oxidant cumene hydroperoxide are added to A1 component and mixed evenly to form A2 component, then 3 parts of triethylamine and 0.3 parts of cobalt naphthenate are added to B1 component and mixed evenly to form B2 component, finally, A2 component and B2 component are mixed evenly to form the two-component insulating coating; when used, the two-component insulating coating is sprayed on the surface of the exposed area of ​​the high-voltage line, and initially cured for 40 minutes at room temperature to form a coating. It is completely cured for 24 hours, and the insulating voltage resistance of the cured coating is 14.95KV.

[0021] Embodiment 3: First, 30 parts of 12-fluoroheptyl methacrylate, 40 parts of 13-fluorooctyl methacrylate, 30 parts of 13-fluorooctyl acrylate, 4 parts of methacrylate laurate, 4 parts of trimethylolpropane trimethacrylate, 4 parts of nano aluminum oxide, and 0.5 parts of leveling agent BYK-333 are mixed evenly and divided into A1 component and B1 component by equal weight, then 5 parts of oxidant cumene hydroperoxide are added to A1 component and mixed evenly to form A2 component, then 4 parts of triethylamine and 0.6 parts of cobalt naphthenate are added to B1 component and mixed evenly to form B2 component, finally, A2 component and B2 component are mixed evenly to form the two-component insulating coating; when used, the two-component insulating coating is sprayed on the surface of the exposed area of ​​the high-voltage line, and initially cured for 30 minutes at room temperature to form a coating. It is completely cured for 24 hours, and the insulating voltage resistance of the cured coating is 15.18KV.

[0022] Embodiment 4: First, 40 parts of dodecafluoroheptyl methacrylate, 45 parts of tridecafluorooctyl methacrylate, 40 parts of tridecafluorooctyl acrylate, 5 parts of methacrylate laurate, 4 parts of trimethylolpropane trimethacrylate, 5 parts of nano aluminum oxide, and 0.4 parts of leveling agent BYK-333 are mixed evenly and divided into A1 component and B1 component by equal weight, then 5 parts of oxidant cumene hydroperoxide are added to A1 component and mixed evenly to form A2 component, then 3.5 parts of triethylamine and 0.8 parts of cobalt naphthenate are added to B1 component and mixed evenly to form B2 component, finally, A2 component and B2 component are mixed evenly to form the two-component insulating coating; when used, the two-component insulating coating is sprayed on the surface of the exposed area of ​​the high-voltage line, and initially cured for 30 minutes at room temperature to form a coating. It is completely cured for 24 hours, and the insulating voltage resistance of the cured coating is 14.1KV.

Claims

1. A high-voltage, long-lasting and stable two-component insulating coating, characterized in that: The invention is composed of a film-forming agent, an oxidizing agent, a reducing agent, an accelerator, a nano filler and a leveling agent; the film-forming agent is composed of dodecafluoroheptyl methacrylate, tridecafluorooctyl methacrylate, tridecafluorooctyl acrylate, lauric methacrylate and trimethylolpropane trimethacrylate.

2. A high-voltage, long-lasting and stable two-component insulating coating as claimed in claim 1, characterized in that: The film-forming agent comprises 20-40 parts by weight of dodecafluoroheptyl methacrylate, 30-50 parts by weight of tridecafluorooctyl methacrylate, 30-40 parts by weight of tridecafluorooctyl acrylate, 3-5 parts by weight of lauric methacrylate, and 2-4 parts by weight of trimethylolpropane trimethacrylate.

3. A high-voltage, long-lasting and stable two-component insulating coating as claimed in claim 1, characterized in that: In the two-component insulating coating, the added amounts of the oxidant, the reductant, the accelerator, the nanofiller and the leveling agent are 3-5 parts, 2.5-4 parts, 0.2-0.8 parts, 3-5 parts and 0.2-0.5 parts by mass respectively.

4. A high-voltage, long-lasting and stable two-component insulating coating as claimed in claim 1, characterized in that: The oxidant is cumene hydroperoxide.

5. A high-voltage, long-lasting and stable two-component insulating coating as claimed in claim 1, characterized in that: The reducing agent is triethylamine.

6. A high-voltage, long-lasting and stable two-component insulating coating as claimed in claim 1, characterized in that: The auxiliary promoter is cobalt naphthenate.

7. A high-voltage, long-lasting and stable two-component insulating coating as claimed in claim 1, characterized in that: The nano filler is nano aluminum oxide.

8. The high-voltage, long-lasting and stable two-component insulating coating according to claim 1, characterized in that: The leveling agent is BYK-333.

9. A method for preparing a high-voltage, long-lasting and stable two-component insulating coating according to any one of claims 1 to 8, characterized in that: First, a film-forming agent, a nanofiller, and a leveling agent are mixed evenly, and then divided into an A1 component and a B1 component with equal mass, and then an oxidant is added to the A1 component and mixed evenly to form an A2 component, and then a reducing agent and a promoter are added to the B1 component and mixed evenly to form a B2 component, and finally, the A2 component and the B2 component are mixed evenly to form the two-component insulating coating; when in use, the two-component insulating coating is sprayed on the surface of the exposed area of ​​the high-voltage line, and initially cured for 30-50 minutes at room temperature to form a coating.