Solvent type anti-icing coating and application thereof

Abstract

The invention provides a solvent type anti-icing coating and application thereof, and belongs to the technical field of coatings. The hydroxyl-containing fluorosilicone resin adopted by the invention has excellent hydrophobicity; inorganic nanoparticles are added to form a micro-nano coarse structure in the coating, so that water does not stay on the surface of the coating for a long time, and the anti-icing performance of the coating is improved; an anti-icing additive is added to reduce the freezing point of water; graphene is added, so that the temperature of the coating is increased by utilizing relatively good heat-conducting property of the graphene, and icing is avoided or ice melting is accelerated; and the types of the anti-icing coating and the dosage of each component are controlled, so that the coating has excellent anti-icing performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and particularly relates to a solvent-based anti-icing coating and its application. Background Art

[0002] Under cold climate conditions, many surfaces such as road bridges, high-voltage wires, wind power generation equipment, etc. are prone to icing, which will not only increase the weight of the equipment, but may also lead to safety hazards such as road traffic accidents, aircraft accidents, damage to transmission lines, etc. In order to avoid the occurrence of safety hazards, generally, an anti-icing coating is applied to the surfaces of roads or equipment, etc. Currently, the commonly used anti-icing coatings are mainly composed of fluorocarbon resin and nanoparticles. However, the anti-icing performance of the existing anti-icing coatings still needs to be further improved. Summary of the Invention

[0003] The purpose of the present invention is to provide a solvent-based anti-icing coating and its application. The anti-icing coating provided by the present invention has better anti-icing performance.

[0004] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0005] The present invention provides a solvent-based anti-icing coating, which comprises component A and component B. Component A comprises the following components in mass percentage: fluorosilicone resin containing hydroxyl groups 10 - 60%, inorganic nanoparticles 1 - 20%, anti-icing additive 1 - 5%, graphene 0.1 - 10%, auxiliary agent 0.1 - 5% and the balance of organic solvent; component B comprises a polyisocyanate curing agent.

[0006] Preferably, the inorganic nanoparticles include one or more of nano-silica, nano-titanium dioxide, nano-aluminum oxide and nano-zinc oxide.

[0007] Preferably, the anti-icing additive includes one or both of polyethylene glycol and glycerol.

[0008] Preferably, the graphene includes one or more of graphene with a particle size of 0.5 - 5 μm and graphene with a particle size of 20 - 50 μm.

[0009] Preferably, the mass ratio of the graphene with a particle size of 0.5 - 5 μm to the graphene with a particle size of 20 - 50 μm is (2 - 4):(6 - 8).

[0010] Preferably, the auxiliary agent includes one or more of a dispersant, a leveling agent and an antifoaming agent.

[0011] Preferably, the organic solvent includes ethyl acetate and / or butyl acetate.

[0012] Preferably, the polyisocyanate curing agent includes one or more of N3390, N75, and HDI.

[0013] Preferably, the mass ratio of the component A to the component B is (1-8):1.

[0014] The present invention also provides an application of the solvent-based anti-icing coating described in the above technical solution in anti-icing of road bridges, high-voltage wires, and wind power generation equipment.

[0015] The present invention provides a solvent-based anti-icing coating, including component A and component B. The component A includes the following components by mass percentage: fluorosilicone resin containing hydroxyl groups 10-60%, inorganic nanoparticles 1-20%, anti-icing additive 1-5%, graphene 0.1-10%, auxiliary agent 0.1-5%, and the balance of organic solvent; the component B includes a polyisocyanate curing agent. The fluorosilicone resin containing hydroxyl groups adopted in the present invention has excellent hydrophobicity; adding inorganic nanoparticles forms a micro-nano rough structure in the coating, so that water will not stay on the coating surface for a long time, improving its anti-icing performance; adding an anti-icing additive to lower the freezing point of water; adding graphene, and using its good thermal conductivity to increase the coating temperature, avoiding icing or accelerating the melting of ice; controlling the types and dosages of the components of the anti-icing coating, so that the coating has excellent anti-icing performance. The results of the examples show that the water contact angle of the solvent-based anti-icing coating provided by the present invention is above 110°. Detailed Embodiments

[0016] The present invention provides a solvent-based anti-icing coating, including component A and component B. The component A includes the following components by mass percentage: fluorosilicone resin containing hydroxyl groups 10-60%, inorganic nanoparticles 1-20%, anti-icing additive 1-5%, graphene 0.1-10%, auxiliary agent 0.1-5%, and the balance of organic solvent; the component B includes a polyisocyanate curing agent.

[0017] The solvent-based anti-icing coating provided by the present invention includes component A.

[0018] By mass percentage, the component A includes 10-60% of fluorosilicone resin containing hydroxyl groups. As an implementation method, the dosage of the fluorosilicone resin containing hydroxyl groups can be specifically 10%, 20%, 30%, 40%, 50%, or 60%. In the present invention, the fluorosilicone resin containing hydroxyl groups combines the excellent properties of fluorocarbon resin and silicone resin, not only making the formed coating have excellent hydrophobicity, but also making the coating have excellent adhesion, hardness, flexibility, weather resistance and other properties. The present invention controls the dosage of the fluorosilicone resin containing hydroxyl groups within the above range, which can further improve the anti-icing performance of the coating.

[0019] The present invention has no special limitation on the source of the hydroxyl-containing fluorosilicone resin, and commercially available products well-known to those skilled in the art can be used. In the examples of the present invention, the hydroxyl-containing fluorosilicone resin is a product with the model number ETERFLON 4263 produced by Changxing Materials Industry Co., Ltd., Taiwan, China.

[0020] By mass percentage, the component A further includes 1-20% of inorganic nanoparticles. As an embodiment, the dosage of the inorganic nanoparticles can specifically be 1%, 5%, 10%, 15% or 20%. The present invention controls the dosage of the inorganic nanoparticles within the above range, which can further improve the anti-icing performance of the coating.

[0021] In the present invention, the inorganic nanoparticles preferably include one or more of titanium dioxide, silicon dioxide, zinc oxide and aluminum oxide, and more preferably include titanium dioxide, silicon dioxide, zinc oxide and aluminum oxide.

[0022] In the present invention, when the inorganic nanoparticles include titanium dioxide, silicon dioxide, zinc oxide and aluminum oxide, the mass ratio of titanium dioxide, silicon dioxide, zinc oxide and aluminum oxide is preferably 1:(0.1-2):(0.8-1.6):(0.5-3).

[0023] In the present invention, when the inorganic nanoparticles include titanium dioxide, silicon dioxide, zinc oxide and aluminum oxide, the particle size of titanium dioxide is preferably 600-800 nm; the particle size of silicon dioxide is preferably 500-650 nm; the particle size of zinc oxide is preferably 200-400 nm; the particle size of aluminum oxide is preferably 300-500 nm. The present invention controls the particle size and mass ratio of titanium dioxide, silicon dioxide, zinc oxide and aluminum oxide within the above range, which can form a micro-nano structure in the coating, and at the same time fill each other to improve the density of the coating, prevent moisture from entering the interior of the coating, and further improve the anti-icing performance of the coating.

[0024] The present invention has no special limitation on the source of the inorganic nanoparticles, and commercially available products well-known to those skilled in the art can be used.

[0025] By mass percentage, the component A further includes 1-5% of an anti-icing additive. As an embodiment, the dosage of the anti-icing additive can specifically be 1%, 2%, 3%, 4% or 5%.

[0026] In the present invention, the anti-icing additive preferably includes one or two of polyethylene glycol and glycerol. In the present invention, the anti-icing additive can lower the freezing point of water, thereby improving the anti-icing performance of the coating. The present invention controls the dosage and type of the anti-icing additive within the above range, which can further improve the anti-icing performance of the coating.

[0027] The present invention has no special limitation on the source of the anti-icing additive, and commercially available products well-known to those skilled in the art can be used.

[0028] By mass percentage, the component A further includes 0.1-10% of graphene. As an embodiment, the dosage of the graphene can be specifically 0.1%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10%.

[0029] In the present invention, the graphene preferably includes one or more of graphene with a particle size of 0.5-5 μm and graphene with a particle size of 20-50 μm, and more preferably includes graphene with a particle size of 0.5-5 μm and graphene with a particle size of 20-50 μm.

[0030] In the present invention, the mass ratio of the graphene with a particle size of 0.5-5 μm to the graphene with a particle size of 20-50 μm is preferably (2-4):(6-8). As an embodiment, the mass ratio of the graphene with a particle size of 0.5-5 μm to the graphene with a particle size of 20-50 μm can be specifically 2:8, 3:7 or 4:6. In the present invention, the graphene has good thermal conductivity, and its good thermal conductivity is used to increase the coating temperature, avoid icing or accelerate the melting of ice; the present invention uses two kinds of graphene with different particle sizes and controls their mass ratio within the above range, which can form a more continuous heat conduction path in the coating and further improve the anti-icing performance of the coating.

[0031] The present invention has no special limitation on the source of the graphene, and commercially available products well-known to those skilled in the art can be used.

[0032] By mass percentage, the component A further includes 0.1-5% of an auxiliary agent. As an embodiment, the dosage of the auxiliary agent can be specifically 0.1%, 1%, 2%, 3%, 4% or 5%.

[0033] In the present invention, the auxiliary agent preferably includes one or more of a dispersant, a leveling agent and an antifoaming agent, and more preferably includes a dispersant, a leveling agent and an antifoaming agent.

[0034] In the present invention, when the auxiliary agent includes a dispersant, a leveling agent and an antifoaming agent, the mass ratio of the dispersant, the leveling agent and the antifoaming agent is preferably (1-3):1:(0.5-1.5), and more preferably 2:1:1. The present invention controls the dosage and type of the auxiliary agent within the above range, which can make each component disperse more uniformly, the coating thickness more uniform and avoid or reduce the appearance of bubbles in the coating, so as to avoid defects such as pinholes and shrinkage holes in the cured coating and further improve the anti-icing performance of the coating.

[0035] The present invention has no special limitation on the source of the additives, and commercially available products well-known to those skilled in the art can be used. In the examples of the present invention, the dispersant is a product with the model number BYK170 produced by BYK Chemie GmbH in Germany; the leveling agent is a product with the model number BYK300 produced by BYK Chemie GmbH in Germany; the defoaming agent is a product with the model number BYK070 produced by BYK Chemie GmbH in Germany.

[0036] The present invention has no special limitation on the source of the additives, and commercially available products well-known to those skilled in the art can be used.

[0037] By mass percentage, the component A further includes the balance of organic solvent. In the present invention, the organic solvent serves as a dispersion medium. By controlling the amount of the organic solvent within the above range, the present invention can make each component dissolve or disperse more fully, and further improve the anti-icing performance of the coating.

[0038] In the present invention, the organic solvent preferably includes ethyl acetate and / or butyl acetate. By using the above organic solvents, the present invention has relatively low toxicity and relatively good environmental friendliness.

[0039] The present invention has no special limitation on the source of the organic solvent, and commercially available products well-known to those skilled in the art can be used.

[0040] The solvent-based anti-icing coating provided by the present invention further includes a component B.

[0041] In the present invention, the component B includes a polyisocyanate curing agent.

[0042] In the present invention, the polyisocyanate preferably includes one or more of N3390, N75, and HDI.

[0043] The present invention has no special limitation on the source of the polyisocyanate, and commercially available products well-known to those skilled in the art can be used.

[0044] In the present invention, the mass ratio of the component A to the component B is preferably (1 to 8):1. As an implementation manner, the mass ratio of the component A to the component B can be specifically 1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, or 8:1. By controlling the mass ratio of the component A to the component B within the above range, the present invention can make the coating cure fully, improve the compactness of the coating, and further improve the anti-icing performance of the coating.

[0045] The present invention has no special limitation on the preparation method of the solvent-based anti-icing coating, and the component A and the component B can be mixed evenly by using the technical solution of material mixing well-known to those skilled in the art.

[0046] The present invention also provides an application of the solvent-based anti-icing coating described in the above technical solution in anti-icing of road bridges, high-voltage wires, and wind power generation equipment.

[0047] The present invention has no special limitation on the operation of the above application, and the technical solutions of the application well-known to those skilled in the art can be adopted.

[0048] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] Example 1

[0050] A solvent-based anti-icing coating is composed of component A and component B. Component A is composed of components with the following mass percentages: fluorosilicone resin containing hydroxyl groups (product with model ETERFLON 4263 produced by Changxing Materials Industry Co., Ltd., Taiwan, China) 15%, inorganic nanoparticles (titanium dioxide (600 - 800 nm), silicon dioxide (500 - 650 nm), zinc oxide (200 - 400 nm), and aluminum oxide (300 - 500 nm) with a mass ratio of 1:0.5:0.8:1) 5%, anti-icing additive (glycerol) 1%, graphene (graphene with a particle size of 0.5 - 5 μm and graphene with a particle size of 20 - 50 μm with a mass ratio of 3:7) 1%, auxiliary agent 1.5% (dispersant (product with model BYK170 produced by BYK Chemie GmbH, Germany), leveling agent (product with model BYK300 produced by BYK Chemie GmbH, Germany), and defoaming agent (product with model BYK070 produced by BYK Chemie GmbH, Germany) with a mass ratio of 2:1:1) and the balance of organic solvent (ethyl acetate); Component B is polyisocyanate N3390 curing agent; the mass ratio of component A to component B is 4:1.

[0051] Example 2

[0052] A solvent-based anti-icing coating is composed of component A and component B. Component A is composed of components with the following mass percentages: fluorosilicone resin containing hydroxyl groups (product with model ETERFLON 4263 produced by Changxing Materials Industry Co., Ltd., Taiwan, China) 30%, inorganic nanoparticles (titanium dioxide (600 - 800 nm), silicon dioxide (500 - 650 nm), zinc oxide (200 - 400 nm), and aluminum oxide (300 - 500 nm) with a mass ratio of 1:0.5:0.8:1) 10%, anti-icing additive (glycerol) 3%, graphene (graphene with a particle size of 0.5 - 5 μm and graphene with a particle size of 20 - 50 μm with a mass ratio of 3:7) 2%, auxiliary agent 2% (dispersant (product with model BYK170 produced by BYK Chemie GmbH, Germany), leveling agent (product with model BYK300 produced by BYK Chemie GmbH, Germany), and defoaming agent (product with model BYK070 produced by BYK Chemie GmbH, Germany) with a mass ratio of 2:1:1) and the balance of organic solvent (ethyl acetate); Component B is polyisocyanate N3390 curing agent; The mass ratio of component A to component B is 4:1.

[0053] Example 3

[0054] Replace the inorganic nanoparticles in Example 2 with silicon dioxide (500 - 650 nm), zinc oxide (200 - 400 nm), and aluminum oxide (300 - 500 nm) with a mass ratio of 0.5:0.8:1, and other parameters are the same as those in Example 2.

[0055] Example 4

[0056] Replace the graphene in Example 2 with only graphene with a particle size of 0.5 - 5 μm, and other parameters are the same as those in Example 2.

[0057] Example 5

[0058] Replace the graphene in Example 2 with only graphene with a particle size of 20 - 50 μm, and other parameters are the same as those in Example 2.

[0059] Comparative Example 1

[0060] Omit the graphene in Example 2, and other parameters are the same as those in Example 2.

[0061] Comparative Example 2

[0062] Omit the glycerol in Example 2, and other parameters are the same as those in Example 2.

[0063] Coat the coatings in Examples 1 - 5 and Comparative Examples 1 - 2 on the surface of aluminum plates respectively, and then cure to obtain aluminum plates with coatings.

[0064] The water contact angles of the aluminum plates coated with the coatings in Examples 1 to 5 and Comparative Examples 1 to 2 were measured, and the results are shown in Table 1.

[0065] Table 1 Water contact angles of aluminum plates coated with the coatings in Examples 1 to 5 and Comparative Examples 1 to 2

[0066]

[0067] As can be seen from Table 1, the types of inorganic nanoparticles, the types of graphene, etc. all have a certain influence on the water contact angle of the coating. The coating obtained by curing the coating provided by the present invention has a large water contact angle, so that water droplets are not easily retained on the surface of the coating, thereby improving the anti-icing performance of the coating.

[0068] The aluminum plates coated with the coatings in Example 2 and Comparative Examples 1 to 2 were first placed in an environment at -5°C for 5 h, and then placed in an environment at 10°C for 1 h. Whether the different aluminum plates froze and the freezing time were observed. Among them, the coating of Example 2 began to freeze after being placed in the -5°C environment for 2.5 h, and the ice layer began to melt 20 min after being placed in the 10°C environment. The coating of Comparative Example 1 began to freeze after being placed in the -5°C environment for 1.8 h, and the ice layer began to melt nearly 1 h after being placed in the 10°C environment. The coating of Comparative Example 2 began to freeze 1 h after being placed in the -5°C environment. This is because, compared with Example 2, Comparative Example 1 omitted graphene, which not only affected the surface roughness of the coating, but also made the frozen coating not easy to melt due to the lack of the heat absorption function of graphene. Comparative Example 2 omitted glycerol, which increased the freezing point of water and made icing more likely to occur.

[0069] In summary, the coating provided by the present invention has excellent anti-icing performance, and after icing, it is also more conducive to the melting of the ice layer when the environmental temperature rises.

[0070] The above are only the preferred embodiments 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 should also be regarded as the protection scope of the present invention.

Claims

1. A solvent-based anti-icing coating, comprising component A and component B, wherein component A comprises the following components in percentage by weight: 10-60% of a fluorosilicone resin containing a hydroxyl group, 1-20% of inorganic nanoparticles, 1-5% of an anti-icing additive, 0.1-10% of graphene, 0.1-5% of an auxiliary agent and the remainder of an organic solvent; and component B comprises a polyisocyanate curing agent.

2. The solvent-based anti-icing coating according to claim 1, characterized in that: The inorganic nanoparticles include one or more of nano silicon dioxide, nano titanium dioxide, nano aluminum oxide and nano zinc oxide.

3. The solvent-based anti-icing coating according to claim 1, characterized in that: The anti-icing additive includes one or both of polyethylene glycol and glycerol.

4. The solvent-based anti-icing coating according to claim 1, characterized in that: The graphene includes one or more of graphene with a particle size of 0.5 to 5 μm and graphene with a particle size of 20 to 50 μm.

5. The solvent-based anti-icing coating according to claim 4, characterized in that: The mass ratio of the graphene with a particle size of 0.5 to 5 μm to the graphene with a particle size of 20 to 50 μm is (2 to 4): (6 to 8).

6. The solvent-based anti-icing coating according to claim 1, characterized in that: The auxiliary agent includes one or more of a dispersant, a leveling agent and a defoaming agent.

7. The solvent-based anti-icing coating according to claim 1, characterized in that: The organic solvent includes ethyl acetate and / or butyl acetate.

8. The solvent-based anti-icing coating according to claim 1, characterized in that: The polyisocyanate curing agent includes one or more of N3390, N75 and HDI.

9. The solvent-based anti-icing coating according to claim 1, characterized in that: The mass ratio of the A component to the B component is (1-8):

1.

10. Use of the solvent-based anti-icing coating according to any one of claims 1 to 9 in anti-icing of roads and bridges, high-voltage wires, and wind power generation equipment.

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