A high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating, its preparation method and application

Abstract

The present invention relates to the technical field of special coating materials, and more particularly to a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating and its preparation method and application. The high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating is made of the following components in parts by mass: 80 to 100 parts of fluorosilicon resin, 10 to 15 parts of nano anti-corrosion material, 5 to 15 parts of wear-resistant powder, 5 to 10 parts of rust-inhibiting pigment, 1 to 2 parts of siloxane dispersant, 1 to 2 parts of polysiloxane defoamer, 1 to 2 parts of organosilicon leveling agent, 1 to 3 parts of polyamide wax anti-settling agent, 25 to 35 parts of amino curing agent, and 2 to 5 parts of amino silane coupling agent; the fluorosilicon resin is a fluorosilicon resin with a molecular weight of 8000 to 12000 and containing silicon-oxygen bonds. The high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating prepared by the present invention improves the adhesion to the substrate, can be cured at room temperature, and has excellent high-temperature anti-corrosion performance.

Description

Technical Field

[0001] The present invention relates to the technical field of special coating materials, and more particularly to a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating, its preparation method and application. Background Art

[0002] The anti-corrosion problem of metal materials seriously affects the service life and safety of equipment. Especially for high-temperature equipment with an application scenario in the temperature range of 100°C to 200°C, there is double corrosion of gas phase and liquid phase in the high and low temperature alternating environment. Existing anti-corrosion coatings have problems such as unstable coating quality, easy peeling, poor anti-corrosion performance, high price, etc., and it is necessary to develop a new type of anti-corrosion coating with excellent performance.

[0003] High-temperature resistant heavy-duty anti-corrosion coatings generally refer to a special functional coating that can withstand high and low temperature alternation and corrosive environments for a long time, enabling the protected object to maintain certain physical and chemical properties and normally play its role in high-temperature environments. The components of high-temperature resistant heavy-duty anti-corrosion coatings include high-temperature resistant film-forming substances, pigments and fillers, solvents, and additives, etc. Existing organic high-temperature resistant heavy-duty anti-corrosion coatings mainly have two categories: organic fluororesin high-temperature resistant coatings and silicone resin high-temperature resistant coatings.

[0004] The side groups of organic fluororesins are short and the structure is saturated, so they have excellent chemical resistance and chemical stability; organic fluororesins are completely non-toxic and friendly to the environment and human health; the large cohesive force of the organic fluororesin chain segments gives organic fluororesins strong surface self-cleaning properties, but organic fluororesins have poor wettability to pigments and fillers and poor solubility in organic solvents. At the same time, because organic fluororesins contain fluorine, their cost is relatively high, which limits the popularization and application of organic fluororesins.

[0005] The main chain of silicone resin is composed of Si-O linkages, and the side chains are various other organic groups. Therefore, silicone resin has both organic and inorganic structures. The relative electronegativity of the two atoms in the Si-O bond differs greatly, so the Si-O bond is highly polar. Due to the above reasons, silicone resin has the dual characteristics of both organic and inorganic substances. Therefore, silicone resin has excellent weather resistance, heat resistance, acid rain resistance, stain resistance, light retention, moisture resistance, water resistance, chemical stability, and electrical insulation. However, precisely because the Si-O bond of silicone resin is highly polar, it is easily broken under the attack of electrophilic reagents or nucleophilic reagents. Therefore, the film-forming property of silicone resin is poor, the curing temperature is relatively high, the curing temperature is 150°C to 250°C, the adhesion to the substrate is poor, and its high-temperature anti-corrosion ability is also very poor. Summary of the Invention

[0006] In view of the above problems, the present invention provides a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating, its preparation method and application, which improve the adhesion to the substrate, can be cured at room temperature, and have excellent high-temperature anti-corrosion performance.

[0007] The first object of the present invention is to provide a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating, which is made of the following components in parts by mass: 80 to 100 parts of fluorosilicon resin, 10 to 15 parts of nano anti-corrosion material, 5 to 15 parts of wear-resistant powder, 5 to 10 parts of rust-inhibiting pigment, 1 to 2 parts of siloxane dispersant, 1 to 2 parts of polysiloxane defoamer, 1 to 2 parts of silicone leveling agent, 1 to 3 parts of polyamide wax anti-settling agent, 25 to 35 parts of amino curing agent, and 2 to 5 parts of amino silane coupling agent.

[0008] The fluorosilicon resin is a fluorosilicon resin with a molecular weight of 8000 to 12000 and containing silicon-oxygen bonds.

[0009] For example, the fluorosilicon resin is 80 parts, 85 parts, 90 parts, 95 parts or 100 parts, etc.; the nano anti-corrosion material is 10 parts, 11 parts, 12 parts, 13 parts, 14 parts or 15 parts, etc.; the wear-resistant powder is 5 parts, 7 parts, 9 parts, 11 parts, 13 parts or 15 parts, etc.; the rust-inhibiting pigment is 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.; the siloxane dispersant is 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts or 2 parts, etc.; the polysiloxane defoamer is 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts or 2 parts, etc.; the silicone leveling agent is 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts or 2 parts, etc.; the polyamide wax anti-settling agent is 1 part, 1.5 parts, 2 parts, 2.5 parts or 3 parts, etc., the amino curing agent is 25 parts, 27 parts, 29 parts, 31 parts, 33 parts or 35 parts, etc.; the amino silane coupling agent is 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts or 5 parts, etc.; but not limited to the listed values, and other unlisted values within the above value range are equally applicable.

[0010] In a preferred embodiment of the present invention, the preparation method of the fluorosilicon resin includes the following steps:

[0011] In an inert atmosphere, add trifluoropropylmethylcyclotrisiloxane to hydrochloric acid solution, and carry out the first ring-opening polymerization reaction at 80°C to 100°C to obtain trifluoropropylmethylchlorosilazane polymer; for example, the temperature of the first ring-opening polymerization reaction is 80°C, 82°C, 84°C, 86°C, 88°C, 90°C, 92°C, 94°C, 96°C, 98°C or 100°C, etc.; but not limited to the listed values, and other unlisted values within the above value range are equally applicable.

[0012] Under an inert atmosphere, a trifluoropropylmethylchlorocyclotrisiloxane polymer and tetramethyltetravinylcyclotetrasiloxane are mixed and preheated for dehydration at 80°C to 100°C, and then a catalyst and a neutralizing agent are added to carry out a second ring-opening polymerization reaction at 150°C to 160°C to form an interpenetrating network fluorosilicone resin. Then, the temperature is lowered to 80°C to 90°C for a holding reaction, and then cooled to room temperature to prepare the fluorosilicone resin. For example, the temperature for preheating dehydration is 80°C, 82°C, 84°C, 86°C, 88°C, 90°C, 92°C, 94°C, 96°C, 98°C or 100°C, etc.; the temperature for the second ring-opening polymerization reaction is 150°C, 152°C, 154°C, 156°C, 158°C or 160°C, etc., and the temperature for the holding reaction is 80°C, 82°C, 84°C, 86°C, 88°C or 90°C, etc.; however, it is not limited to the listed values, and other unlisted values within the above value ranges are equally applicable.

[0013] In a preferred embodiment of the present invention, the molar ratio of trifluoropropylmethylcyclotrisiloxane to hydrochloric acid solution is 100:2 to 3; the reaction time of the first ring-opening polymerization reaction is 1 h to 2 h. For example, the molar ratio of trifluoropropylmethylcyclotrisiloxane to hydrochloric acid solution is 100:2, 100:2.2, 100:2.4, 100:2.6, 100:2.8 or 100:3, etc., and the reaction time of the first ring-opening polymerization reaction is 1 h, 1.2 h, 1.4 h, 1.6 h, 1.8 h or 2.0 h, etc.; however, it is not limited to the listed values, and other unlisted values within the above value ranges are equally applicable.

[0014] In a preferred embodiment of the present invention, the molar ratio of trifluoropropylmethylchlorocyclotrisiloxane polymer to tetramethyltetravinylcyclotetrasiloxane is 2:1 to 1.5; the reaction time of the second ring-opening polymerization reaction is 2 h to 3 h. For example, the molar ratio of trifluoropropylmethylchlorocyclotrisiloxane polymer to tetramethyltetravinylcyclotetrasiloxane is 2:1, 2:1.1, 2:1.2, 2:1.3, 2:1.4 or 2:1.5, etc.; however, it is not limited to the listed values, and other unlisted values within the above value ranges are equally applicable.

[0015] In a preferred embodiment of the present invention, the addition amount of the catalyst is 0.3% to 0.4% of the total mass of the trifluoropropylmethylchlorocyclotrisiloxane polymer and tetramethyltetravinylcyclotetrasiloxane; for example, the addition amount of the catalyst is 0.3%, 0.32%, 0.34%, 0.36%, 0.38% or 0.4% of the total mass of the trifluoropropylmethylchlorocyclotrisiloxane polymer and tetramethyltetravinylcyclotetrasiloxane, etc.; however, it is not limited to the listed values, and other unlisted values within the above value ranges are equally applicable.

[0016] In a preferred embodiment of the present invention, the addition amount of the neutralizing agent is 0.5% to 0.6% of the total mass of the trifluoropropylmethylchlorosilazane polymer and tetramethyltetravinylcyclotetrasiloxane. For example, the addition amount of the neutralizing agent is 0.5%, 0.52%, 0.54%, 0.56%, 0.58% or 0.6% of the total mass of the trifluoropropylmethylchlorosilazane polymer and tetramethyltetravinylcyclotetrasiloxane, etc., but is not limited to the listed values, and other unlisted values within the above value range are equally applicable.

[0017] In a preferred embodiment of the present invention, the catalyst is a manganese catalyst. The neutralizing agent is AMP95.

[0018] In a preferred embodiment of the present invention, the nano anti-corrosion material is one or more of nano-aluminum oxide, nano-iron oxide, nano-magnesium oxide, nano-titanium dioxide and nano-silica gel. Typical but non-limiting examples of the combination include the combination of nano-aluminum oxide and nano-iron oxide, the combination of nano-iron oxide and nano-magnesium oxide, the combination of nano-titanium dioxide and nano-silica gel, etc.

[0019] The wear-resistant powder is one or more of silicon carbide, wollastonite, zirconia, white fused alumina and glass powder. Typical but non-limiting examples of the combination include the combination of silicon carbide and wollastonite, the combination of wollastonite and zirconia, the combination of zirconia and white fused alumina, the combination of white fused alumina and glass powder, etc.

[0020] The rust-inhibiting pigment is one or more of zinc phosphate, aluminum tripolyphosphate, mica powder and iron oxide. Typical but non-limiting examples of the combination include the combination of zinc phosphate and aluminum tripolyphosphate, the combination of aluminum tripolyphosphate and mica powder, the combination of mica powder and iron oxide, etc.

[0021] The second object of the present invention is to provide a preparation method of the above high-temperature resistant heavy anti-corrosion fluorosilicon polymer coating, which is prepared according to the following steps:

[0022] Weigh each component according to the following mass parts: 80 parts to 100 parts of fluorosilicon resin, 10 parts to 15 parts of nano anti-corrosion material, 5 parts to 15 parts of wear-resistant powder, 5 parts to 10 parts of rust-inhibiting pigment, 1 part to 2 parts of siloxane dispersant, 1 part to 2 parts of polysiloxane defoamer, 1 part to 2 parts of silicone leveling agent, 1 part to 3 parts of polyamide wax anti-settling aid, 25 parts to 35 parts of amino curing agent, 2 parts to 5 parts of amino silane coupling agent.

[0023] Take 1 / 3 to 1 / 2 of the fluorosilicon resin, silicone leveling agent, siloxane dispersant, wear-resistant powder and rust-inhibiting pigment, mix them evenly, grind them, and then add the remaining fluorosilicon resin and mix evenly to obtain the first mixture.

[0024] Mix the remaining fluorosilicon resin, nano anti-corrosion material and polyamide wax anti-settling aid evenly to obtain the second mixture.

[0025] After mixing the first mixture and the second mixture, a polysiloxane defoaming agent is added. When applying by spraying, an amino curing agent and a mixture of amino silane coupling agents are added and stirred evenly to obtain a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating.

[0026] The third object of the present invention is to provide the application of the above-mentioned high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating in the preparation of anti-corrosion materials, including the following steps:

[0027] After the substrate is degreased and derusted, the high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating is sprayed on the surface of the substrate, and the total wet film thickness of the coating is controlled to be 1 mm to 2 mm, and the total dry film thickness of the coating is 0.5 mm to 1 mm. After spraying, it is dried at room temperature for 7 days to 15 days to prepare a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The present invention selects a high molecular weight fluorosilicon resin with a molecular weight of 8000 - 12000 as the film-forming substance, which has a high adhesion to the substrate. The advantage of the silicon-oxygen bond on the fluorosilicon resin is its high bond energy strength, which can improve the corrosion resistance, high-temperature resistance, and wear resistance of the fluorosilicon resin. Adding a nano anti-corrosion material can improve the shielding effect of the coating and shield the penetration of corrosive media; adding a rust-inhibiting pigment as an anti-corrosion component can enhance the chemical resistance of the coating as an inert material; adding an amino curing agent and a silane coupling agent as curing agents, the amino curing agent as the main curing agent component reacts with the silicon-oxygen bond of the fluorosilicon resin, and in combination with the silane coupling agent, taking advantage of the self-crosslinking characteristic of the silane coupling agent, it can be cured by drying at room temperature, thereby improving the overall drying speed and performance indicators. In addition, it is beneficial to improve the overall denseness and tensile strength of the coating, making the coating have excellent corrosion resistance; the nano anti-corrosion material forms an interpenetrating network arrangement characteristic with the high molecular weight fluorosilicon resin in the coating, playing an excellent shielding effect. Under the synergistic action of all components in a reasonable ratio, it ensures that the coating has heavy-duty anti-corrosion performance. In addition, the fluorosilicon polymer coating has the advantages of low surface tension and self-cleaning performance of organic fluorine coatings, resulting in the fact that the coating surface is not easily adhered to corrosion substances such as dust, salt, moisture, and chemicals, greatly enhancing the high-temperature anti-corrosion performance.

[0030] (2) The high molecular weight organic fluorine resin and organic silicon resin used in the present invention both have excellent high-temperature resistance and can maintain toughness in a high-temperature environment of 300 °C for a long time. After the organic fluorine resin and organic silicon resin are modified and synthesized into fluorosilicon resin, it has the advantages of good solubility and dispersibility of the organic silicon resin, thereby improving the solubility of the organic fluorine resin. The high molecular weight fluorosilicon resin improves the disadvantage of low adhesion of the organic silicon resin when used alone on the substrate surface, and can still maintain good thermal shock performance in a high-low temperature alternating environment, improving the overall adhesion and bonding strength.

[0031] (3) The present invention improves the wear resistance and erosion resistance of the fluorosilicon polymer coating by adding wear-resistant powders such as silicon carbide, wollastonite, zirconia, white fused alumina, and glass powder, and adding a silane coupling agent to improve the crosslinking density and coating hardness, so that the coating has excellent wear resistance and erosion resistance. Description of the Drawings

[0032] Figure 1 It is a schematic diagram for preparing the trifluoropropylmethylchlorosilane polymer of the present invention.

[0033] Figure 2 It is a schematic diagram for preparing the fluorosilicon resin of the present invention. Detailed Embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of 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 of 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.

[0035] The present invention provides a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating, which is made of the following components in parts by mass: 80 to 100 parts of fluorosilicon resin, 10 to 15 parts of nano anti-corrosion material, 5 to 15 parts of wear-resistant powder, 5 to 10 parts of rust-inhibiting pigment, 1 to 2 parts of siloxane dispersant, 1 to 2 parts of polysiloxane defoamer, 1 to 2 parts of organosilicon leveling agent, 1 to 3 parts of polyamide wax anti-settling agent, 25 to 35 parts of amino curing agent, and 2 to 5 parts of amino silane coupling agent.

[0036] The fluorosilicon resin is a fluorosilicon resin with a molecular weight of 8000 to 12000 and containing silicon-oxygen bonds.

[0037] The present invention optimizes and modifies by means of high-temperature chelation reaction of a high-molecular fluororesin monomer and a high-molecular silicone resin monomer in a certain proportion. The synthesized fluorosilicone resin is used as the main film-forming substance, and an amino curing agent is used as a curing agent to improve the drying speed and coating strength. A silane coupling agent is added to increase the crosslinking degree and toughness, and a nano anti-corrosion material, wear-resistant powder and functional anti-rust pigment are added, so that the coating has excellent corrosion resistance and wear resistance; the coating has high hardness and strong flexibility, has a low water vapor permeability coefficient and high flexibility performance, and can prevent the penetration of corrosive substances and long-term contact aging; at the same time, it has excellent wear resistance to avoid the erosion and wear of corrosive substances. After the organic fluororesin and the organic silicone resin are modified and synthesized into the fluorosilicone resin, it has the advantages of good adhesion of the organic fluororesin, improves the adhesion of the organic silicone resin, and improves the disadvantages of poor wettability and solubility of the organic fluororesin coating and poor adhesion and general anti-corrosion performance of the organic silicone resin coating, and improves the overall adhesion, temperature resistance, corrosion resistance and wear resistance of the coating, and can be cured by heat at room temperature with a curing agent. Specifically, the amino curing agent undergoes a substitution crosslinking reaction with the fluorosilicone resin. Coupled with the self-crosslinking characteristics of the silane coupling agent, it can be dried and cured at room temperature, eliminating the conditions of high-temperature baking and curing of traditional organic fluororesin coatings and organic silicone coatings, and making a breakthrough in improving the construction efficiency and reducing the construction cost during the coating application process.

[0038] Further, the preparation method of the fluorosilicone resin includes the following steps:

[0039] Under an inert atmosphere, trifluoropropylmethylcyclotrisiloxane is added to a hydrochloric acid solution, and a first ring-opening polymerization reaction occurs at 80°C to 100°C to obtain a trifluoropropylmethylchlorosilazane polymer; specifically, under the action of the hydrochloric acid solution, the silicon-oxygen bond of trifluoropropylmethylcyclotrisiloxane is opened and broken, a polycondensation reaction occurs, and a substitution reaction occurs with chloride ions to generate a trifluoropropylmethylchlorosilazane polymer, as Figure 1 shown.

[0040] Under an inert atmosphere, the trifluoropropylmethylchlorosilazane polymer and tetramethyltetravinylcyclotetrasiloxane are mixed and preheated and dehydrated at 80°C to 100°C, and then a catalyst and a neutralizing agent are added, and a second ring-opening polymerization reaction occurs at 150°C to 160°C to generate an interpenetrating network fluorosilicone resin. Then, the temperature is lowered to 80°C to 90°C for heat preservation reaction, and then cooled to room temperature to prepare the fluorosilicone resin. After the trifluoropropylmethylchlorosilazane polymer and tetramethyltetravinylcyclotetrasiloxane are mixed and dehydrated, under the action of a catalyst and a neutralizing agent, the internal silicon-oxygen bond of tetramethyltetravinylcyclotetrasiloxane is broken, and a substitution reaction occurs with the chloromethyl group in the trifluoropropylmethylchlorosilazane polymer, and a macromolecular polycondensation reaction is completed to generate the fluorosilicone resin, as Figure 2 shown.

[0041] Further, the molar ratio of trifluoropropylmethylcyclotrisiloxane to hydrochloric acid solution is 100:2 to 3; the reaction time of the first ring-opening polymerization reaction is 1 h to 2 h.

[0042] Further, the molar ratio of trifluoropropylmethylchlorosilazane polymer to tetramethyltetravinylcyclotetrasiloxane is 2:1 to 1.5; the reaction time of the second ring-opening polymerization reaction is 2 h to 3 h.

[0043] Further, the addition amount of the catalyst is 0.3% to 0.4% of the total mass of trifluoropropylmethylchlorosilazane polymer and tetramethyltetravinylcyclotetrasiloxane.

[0044] The addition amount of the neutralizing agent is 0.5% to 0.6% of the total mass of trifluoropropylmethylchlorosilazane polymer and tetramethyltetravinylcyclotetrasiloxane.

[0045] Further, the catalyst is a manganese catalyst.

[0046] The neutralizing agent is AMP95.

[0047] Further, the nano anti-corrosion material is one or more of nano-aluminum oxide, nano-iron oxide, nano-magnesium oxide, nano-titanium dioxide and nano-silica gel.

[0048] The wear-resistant powder is one or more of silicon carbide, wollastonite, zirconia, white fused alumina and glass powder.

[0049] The rust-inhibiting pigment is one or more of zinc phosphate, aluminum tripolyphosphate, mica powder and iron oxide pigment.

[0050] The present invention also provides a preparation method of the above high-temperature resistant heavy anti-corrosion fluorosilicon polymer coating, which is prepared according to the following steps:

[0051] Weigh each component according to the following mass parts: 80 to 100 parts of fluorosilicon resin, 10 to 15 parts of nano anti-corrosion material, 5 to 15 parts of wear-resistant powder, 5 to 10 parts of rust-inhibiting pigment, 1 to 2 parts of siloxane dispersant, 1 to 2 parts of polysiloxane defoamer, 1 to 2 parts of organosilicon leveling agent, 1 to 3 parts of polyamide wax anti-settling agent, 25 to 35 parts of amino curing agent, and 2 to 5 parts of amino silane coupling agent.

[0052] Take 1 / 3 to 1 / 2 of the fluorosilicon resin, organosilicon leveling agent, siloxane dispersant, wear-resistant powder and rust-inhibiting pigment, mix them evenly, grind them, and then add the remaining fluorosilicon resin and mix evenly to obtain the first mixture.

[0053] Mix the remaining fluorosilicon resin, nano anti-corrosion material and polyamide wax anti-settling agent evenly to obtain the second mixture.

[0054] After the first mixture and the second mixture are mixed, a polysiloxane defoamer is added and stirred evenly to obtain component A.

[0055] The amino curing agent and the aminosilane coupling agent are mixed to obtain component B.

[0056] During spraying, component A and component B are stirred evenly to obtain a high temperature resistant and heavy corrosion resistant fluorosilicone polymer coating.

[0057] The high temperature resistant and heavy corrosion resistant fluorosilicone polymer coating prepared by the present invention can be used for high temperature, corrosion and wear of metal substrates, such as carbon steel, stainless steel, alloy steel, etc. The high temperature resistant and heavy corrosion resistant fluorosilicone polymer coating prepared by the present application is used in the following steps:

[0058] (1) The substrate is degreased and derusted to at least Sa2.0 level; the construction environment is controlled at a temperature of 10°C to 35°C and a relative humidity of <90%.

[0059] (2) Use spraying method to spray the paint film to the specified thickness in multiple times. After each layer of coating is sprayed and dried, the next layer of spraying can be carried out.

[0060] (3) The total wet film thickness of the coating is controlled to be 1 mm to 2 mm, and the total dry film thickness of the coating is controlled to be 0.5 mm to 1 mm. After spraying, the coating is dried at room temperature for 7 to 15 days to prepare a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating on the surface of the substrate.

[0061] The siloxane dispersant used in the present invention is TSI-316. The polysiloxane defoamer is Deqian 5100 solvent-based defoamer. The organosilicon leveling agent is BYK-300. The polyamide wax anti-settling aid is PA-8610. The manganese catalyst is manganese acetate.

[0062] Example 1

[0063] This embodiment provides a high temperature resistant and heavy corrosion resistant fluorosilicone polymer coating, which is composed of the following components in parts by weight:

[0064] Component A: 100 parts of fluorosilicone resin, 15 parts of nano anti-corrosion materials, 12 parts of wear-resistant powder, 6 parts of anti-rust pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoaming agent, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling aid.

[0065] Component B: 30 parts of 4-4'-dicyclohexylamine and 5 parts of aminosilane coupling agent.

[0066] The molecular weight of the fluorosilicone resin used in this embodiment is about 9,000.

[0067] The molecular weight of 4-4'-dicyclohexylamine is about 1000.

[0068] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5-10 nm.

[0069] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0070] The rust-inhibitive pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the rust-inhibitive pigment is 5-10 μm.

[0071] The amino-silane coupling agent is 3-aminopropyltrimethoxysilane.

[0072] The preparation method of the fluorosilicone resin comprises the following steps:

[0073] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution by mass concentration according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:2. Under argon protection, heat to 80 °C and react for 2 h to carry out ring-opening polymerization reaction to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 4000.

[0074] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to the molar ratio of 2:1. Gradually heat to 100 °C under argon protection for preheating and dehydration for 30 min. Then add 0.3% manganese catalyst based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and 0.5% neutralizer AMP95 based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane. React at 150 °C under argon protection for 2 h to carry out ring-opening polymerization reaction to form a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 2 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin with a molecular weight of about 9000.

[0075] This embodiment also provides a preparation method of a high-temperature resistant heavy-duty anti-corrosion fluorosilicone polymer coating, which comprises the following steps:

[0076] (1) Mix 1 / 3 of the high-molecular fluorosilicone resin, organosilicon leveling agent and siloxane dispersant evenly, add the wear-resistant powder and rust-inhibitive pigment and stir for 20 min to obtain a slurry.

[0077] (2) Grind the slurry stirred evenly in step (1) by a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0078] (3) Mix the remaining 2 / 3 of the high-molecular fluorosilicone resin, nano anti-corrosion material and polyamide wax anti-settling aid evenly, and stir for 40 min to obtain a second mixture.

[0079] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoamer, and stir for 20 min to obtain Component A.

[0080] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain Component B.

[0081] (6) During spray construction, mix Component A and Component B evenly before use.

[0082] Example 2

[0083] This example provides a high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating, which is composed of the following components in parts by mass:

[0084] Component A: 90 parts of fluorosilicon resin, 10 parts of nano anti-corrosion material, 10 parts of wear-resistant powder, 6 parts of rust-inhibiting pigment, 1 part of siloxane dispersant, 1 part of polysiloxane defoamer, 1 part of organosilicon leveling agent, 1 part of polyamide wax anti-settling agent.

[0085] Component B: 35 parts of 4,4'-methylenebis(cyclohexylamine), 5 parts of amino-silane coupling agent.

[0086] In this example, the molecular weight of the fluorosilicon resin is about 9000.

[0087] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1000.

[0088] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5 - 10 nm.

[0089] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0090] The rust-inhibiting pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the rust-inhibiting pigment is 5 - 10 μm.

[0091] The amino-silane coupling agent is 3-aminopropyltrimethoxysilane.

[0092] The preparation method of the fluorosilicon resin includes the following steps:

[0093] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and a hydrochloric acid solution with a mass concentration of 5% according to a molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:2. Under argon protection, heat to 80 °C and react for 2 h to carry out a ring-opening polymerization reaction to obtain a trifluoropropylmethylchlorosilane polymer with a molecular weight of about 4000.

[0094] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly at a molar ratio of 2:1, and gradually heat it to 100 °C under argon protection for preheating and dehydration for 30 min. Then add a manganese catalyst accounting for 0.3% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and a neutralizing agent AMP95 accounting for 0.5% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane, and react at 150 °C under argon protection for 2 h to undergo ring-opening polymerization to form a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 2 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin. The molecular weight of the fluorosilicone resin is about 9000.

[0095] This example also provides a preparation method of a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, including the following steps:

[0096] (1) Mix 1 / 3 of the high-molecular fluorosilicone resin, an organosilicon leveling agent, and a siloxane dispersant evenly, add wear-resistant powder and anti-rust pigment, and stir for 20 min to obtain a slurry.

[0097] (2) Grind the slurry stirred evenly in step (1) with a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0098] (3) Mix the remaining 2 / 3 of the high-molecular fluorosilicone resin, nano anti-corrosion material, and polyamide wax anti-settling aid evenly, and stir for 40 min to obtain a second mixture.

[0099] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoaming agent, and stir for 20 min to prepare component A.

[0100] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain component B.

[0101] (6) During spraying construction, mix component A and component B evenly before use.

[0102] Example 3

[0103] This example provides a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, which is composed of the following components in parts by mass:

[0104] Component A: 100 parts of fluorosilicone resin, 15 parts of nano anti-corrosion material, 12 parts of wear-resistant powder, 6 parts of anti-rust pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoaming agent, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling aid.

[0105] Component B: 30 parts of 4,4'-methylenebis(cyclohexylamine) and 5 parts of silane coupling agent, so the total of Component B is 35 parts.

[0106] In this embodiment, the molecular weight of the fluorosilicone resin is about 9000.

[0107] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1000.

[0108] The nano anti-corrosion material is nano titanium dioxide with a particle size of 5 - 10 nm.

[0109] The wear-resistant powder is silicon carbide.

[0110] The rust-inhibiting pigment is mica powder with a particle size of 5 - 10 μm.

[0111] The amino silane coupling agent is 3-aminopropyltrimethoxysilane.

[0112] The preparation method of the fluorosilicone resin includes the following steps:

[0113] (1) Weigh the 1,3,5-tris(trifluoropropyl)cyclotrisiloxane monomer and the hydrochloric acid solution with a mass concentration of 5% according to the molar ratio of 100:2. Under the protection of argon, heat to 80 °C and react for 2 h to carry out ring-opening polymerization reaction to obtain 1,3,5-tris(trifluoropropyl)chlorosilane polymer with a molecular weight of about 4000.

[0114] (2) Mix the 1,3,5-tris(trifluoropropyl)chlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to the molar ratio of 2:1. Under the protection of argon, gradually heat to 100 °C for preheating and dehydrating for 30 min. Then add 0.3% of manganese catalyst based on the total mass of 1,3,5-tris(trifluoropropyl)chlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and 0.5% of neutralizer AMP95 based on the total mass of 1,3,5-tris(trifluoropropyl)chlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane, and react at 150 °C under the protection of argon for 2 h to carry out ring-opening polymerization reaction to generate a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 2 h, and cool to room temperature, thus preparing a stable high-molecular fluorosilicone resin with a molecular weight of about 9000.

[0115] This embodiment also provides a preparation method of a high-temperature resistant heavy anti-corrosion fluorosilicone polymer coating, including the following steps:

[0116] (1) Mix 1 / 3 of the high-molecular fluorosilicone resin, an organosilicon leveling agent and a siloxane dispersant evenly, add the wear-resistant powder and the functional rust-inhibiting pigment, and stir for 20 min to obtain a slurry.

[0117] (2) Grind the slurry stirred evenly in step (1) through a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain the first mixture.

[0118] (3) Mix the remaining 2 / 3 of the high molecular fluorosilicone resin, nano anti-corrosion material and polyamide wax anti-settling agent evenly and stir for 40 min to obtain a second mixture.

[0119] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoaming agent, and stir for 20 min to prepare component A.

[0120] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino silane coupling agent to obtain component B.

[0121] (6) During spraying construction, mix component A and component B evenly before use.

[0122] Example 4

[0123] This example provides a high-temperature resistant heavy anti-corrosion fluorosilicone polymer coating, which is composed of the following components in parts by mass:

[0124] Component A: 100 parts of fluorosilicone resin, 10 parts of nano anti-corrosion material, 15 parts of wear-resistant powder, 8 parts of rust-inhibiting pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoaming agent, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling agent.

[0125] Component B: 35 parts of 4,4'-methylenebis(cyclohexylamine), 5 parts of amino silane coupling agent.

[0126] The molecular weight of the high molecular fluorosilicone resin in the coating is about 9000.

[0127] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1000.

[0128] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5 - 10 nm.

[0129] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0130] The rust-inhibiting pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the rust-inhibiting pigment is 5 - 10 μm.

[0131] The amino silane coupling agent is N-(β-aminoethyl-γ-aminopropyl)methylsilane.

[0132] The preparation method of the fluorosilicone resin includes the following steps:

[0133] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid being 100:2. Under argon protection, heat to 80 °C and react for 2 h to carry out ring-opening polymerization to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 4000.

[0134] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to the molar ratio of 2:1. Gradually heat to 100 °C under argon protection for preheating and dehydration for 30 min. Then add a manganese catalyst accounting for 0.3% of the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and a neutralizing agent AMP95 accounting for 0.5% of the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane, and react at 150 °C under argon protection for 2 h to carry out ring-opening polymerization to form a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 2 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin with a molecular weight of about 9000.

[0135] This example also provides a preparation method of a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, including the following steps:

[0136] (1) Mix 1 / 3 of the high-molecular fluorosilicone resin, an organosilicon leveling agent and a siloxane dispersant evenly, add wear-resistant powder and a functional anti-rust pigment and stir for 20 min to obtain a slurry.

[0137] (2) Grind the slurry stirred evenly in step (1) with a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0138] (3) Mix the remaining 2 / 3 of the high-molecular fluorosilicone resin, a nano anti-corrosion material and a polyamide wax anti-settling aid evenly, and stir for 40 min to obtain a second mixture.

[0139] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoamer, and stir for 20 min to prepare component A.

[0140] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain component B.

[0141] (6) During spraying construction, mix component A and component B evenly for use.

[0142] Example 5

[0143] This example provides a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, which is composed of the following components in parts by mass:

[0144] Component A: 100 parts of fluorosilicone resin, 15 parts of nano anti-corrosion material, 12 parts of wear-resistant powder, 6 parts of anti-rust pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoamer, 2 parts of silicone leveling agent, 2 parts of polyamide wax anti-settling agent.

[0145] Component B: 30 parts of 4,4'-methylenebis(cyclohexylamine), 5 parts of amino-silane coupling agent.

[0146] In this example, the molecular weight of the fluorosilicone resin used is about 8000.

[0147] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1000.

[0148] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5 - 10 nm.

[0149] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0150] The anti-rust pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the anti-rust pigment is 5 - 10 μm.

[0151] The amino-silane coupling agent is 3-aminopropyltrimethoxysilane.

[0152] The preparation method of the fluorosilicone resin includes the following steps:

[0153] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:2.5. Under argon protection, heat to 80°C and react for 1 h to carry out ring-opening polymerization reaction to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 3000.

[0154] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to the molar ratio of 2:1. Under argon protection, gradually heat to 100°C for preheating and dehydration for 30 min. Then add 0.3% manganese catalyst based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and 0.5% neutralizer AMP95 based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane, and react at 150°C under argon protection for 2 h to carry out ring-opening polymerization reaction to generate a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80°C, keep the temperature for reaction for 1 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin with a molecular weight of about 8000.

[0155] This embodiment also provides a method for preparing a high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating, comprising the following steps:

[0156] (1) Mix 1 / 3 of the fluorosilicon resin, an organosilicon leveling agent, and a siloxane dispersant evenly, add wear-resistant powder and rust-inhibiting pigment, and stir for 20 min to obtain a slurry.

[0157] (2) Grind the slurry stirred evenly in step (1) through a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0158] (3) Mix the remaining 2 / 3 of the fluorosilicon resin, nano anti-corrosion material, and polyamide wax anti-settling agent evenly, and stir for 40 min to obtain a second mixture.

[0159] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoaming agent, and stir for 20 min to prepare component A.

[0160] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain component B.

[0161] (6) During spray construction, mix component A and component B evenly before use.

[0162] Example 6

[0163] This embodiment provides a high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating, which is composed of the following components in parts by mass:

[0164] Component A: 100 parts of fluorosilicon resin, 15 parts of nano anti-corrosion material, 12 parts of wear-resistant powder, 6 parts of rust-inhibiting pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoaming agent, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling agent.

[0165] Component B: 30 parts of 4,4'-methylenebis(cyclohexylamine), 5 parts of amino-silane coupling agent.

[0166] The molecular weight of the fluorosilicon resin used in this embodiment is about 12,000.

[0167] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1,000.

[0168] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5 - 10 nm.

[0169] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0170] The rust-inhibiting pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the rust-inhibiting pigment is 5-10 μm.

[0171] The amino silane coupling agent is 3-aminopropyltrimethoxysilane.

[0172] The preparation method of the fluorosilicone resin comprises the following steps:

[0173] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:3. Under argon protection, heat to 80 °C and react for 1.5 h to carry out ring-opening polymerization reaction to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 4000.

[0174] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to the molar ratio of 2:1.5. Gradually heat to 100 °C under argon protection for 30 min for preheating and dehydration. Then add 0.3% manganese catalyst based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and 0.5% neutralizer AMP95 based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane. React at 160 °C under argon protection for 3 h to carry out ring-opening polymerization reaction to generate a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 1.5 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin with a molecular weight of about 12000.

[0175] This embodiment also provides a preparation method of a high-temperature resistant heavy-duty anti-corrosion fluorosilicone polymer coating, which comprises the following steps:

[0176] (1) Mix 1 / 3 of the high-molecular fluorosilicone resin, an organosilicon leveling agent and a siloxane dispersant evenly, add wear-resistant powder and rust-inhibiting pigment and stir for 20 min to obtain a slurry.

[0177] (2) Grind the slurry stirred evenly in step (1) by a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0178] (3) Mix the remaining 2 / 3 of the high-molecular fluorosilicone resin, nano anti-corrosion material and polyamide wax anti-settling aid evenly, and stir for 40 min to obtain a second mixture.

[0179] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoamer, and stir for 20 min to prepare component A.

[0180] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain Component B.

[0181] (6) During spray application, mix Component A and Component B evenly before use.

[0182] Example 7

[0183] This example provides a high-temperature resistant heavy-duty fluorosilicon polymer coating, which is composed of the following components in parts by mass:

[0184] Component A: 80 parts of fluorosilicon resin, 12 parts of nano anti-corrosion material, 5 parts of wear-resistant powder, 5 parts of anti-rust pigment, 1 part of siloxane dispersant, 2 parts of polysiloxane defoamer, 1.5 parts of silicone leveling agent, 3 parts of polyamide wax anti-settling agent.

[0185] Component B: 25 parts of 4,4'-methylenebis(cyclohexylamine), 2 parts of amino-silane coupling agent.

[0186] The molecular weight of the fluorosilicon resin used in this example is about 10,000.

[0187] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1,000.

[0188] The nano anti-corrosion material is a mixture of nano magnesium oxide and nano silica gel with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5 - 10 nm.

[0189] The wear-resistant powder is a mixture of white corundum and glass powder with a mass ratio of 1:2.

[0190] The anti-rust pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and iron oxide pigment with a mass ratio of 1:1:1, and the particle size of the anti-rust pigment is 5 - 10 μm.

[0191] The amino-silane coupling agent is 3-aminopropyltrimethoxysilane.

[0192] The preparation method of the fluorosilicon resin includes the following steps:

[0193] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:2. Under argon protection, heat to 80 °C and react for 3 h to carry out ring-opening polymerization reaction to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 5,000.

[0194] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to a molar ratio of 2:1, gradually heat it to 100 °C under argon protection for preheating and dehydration for 30 min. Then add a manganese catalyst accounting for 0.4% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and a neutralizing agent AMP95 accounting for 0.6% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane, and react at 150 °C under argon protection for 2 h to carry out ring-opening polymerization to form a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 2 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin. The molecular weight of the fluorosilicone resin is about 10,000.

[0195] This example also provides a preparation method of a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, including the following steps:

[0196] (1) Mix 2 / 5 of the high-molecular fluorosilicone resin, an organosilicon leveling agent, and a siloxane dispersant evenly, add wear-resistant powder and anti-rust pigment, and stir for 20 min to obtain a slurry.

[0197] (2) Grind the slurry stirred evenly in step (1) with a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0198] (3) Mix the remaining 3 / 5 of the high-molecular fluorosilicone resin, nano anti-corrosion material, and polyamide wax anti-settling aid evenly, and stir for 40 min to obtain a second mixture.

[0199] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoaming agent, and stir for 20 min to prepare component A.

[0200] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain component B.

[0201] (6) During spraying construction, mix component A and component B evenly for use.

[0202] Example 8

[0203] This example provides a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, which is composed of the following components in parts by mass:

[0204] Component A: 90 parts of fluorosilicone resin, 11 parts of nano anti-corrosion material, 10 parts of wear-resistant powder, 10 parts of anti-rust pigment, 1.5 parts of siloxane dispersant, 1.5 parts of polysiloxane defoaming agent, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling aid.

[0205] Component B: 30 parts of 4,4'-methylenebis(cyclohexylamine) and 4 parts of amino-silane coupling agent.

[0206] The molecular weight of the fluorosilicone resin used in this example is about 10,000.

[0207] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1,000.

[0208] The nano anti-corrosion material is a mixture of nano magnesium oxide and nano silica gel with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5 - 10 nm.

[0209] The wear-resistant powder is a mixture of white fused alumina and glass powder with a mass ratio of 1:2.

[0210] The anti-rust pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and iron oxide pigment with a mass ratio of 1:1:1, and the particle size of the anti-rust pigment is 5 - 10 μm.

[0211] The amino-silane coupling agent is 3-aminopropyltrimethoxysilane.

[0212] The preparation method of the fluorosilicone resin includes the following steps:

[0213] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:2. Under argon protection, heat to 80 °C and react for 3 h to carry out ring-opening polymerization reaction to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 4,000.

[0214] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to the molar ratio of 2:1. Under argon protection, gradually heat to 100 °C and preheat for dehydration for 30 min. Then add 0.35% manganese catalyst based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and 0.55% neutralizer AMP95 based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane. React at 150 °C under argon protection for 2 h to carry out ring-opening polymerization reaction to generate a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 2 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin with a molecular weight of about 10,000.

[0215] This example also provides a preparation method of a high-temperature resistant heavy-duty anti-corrosion fluorosilicone polymer coating, including the following steps:

[0216] (1) Mix 1 / 2 of the high-molecular fluorosilicone resin, organosilicon leveling agent and siloxane dispersant evenly, add the wear-resistant powder and anti-rust pigment and stir for 20 min to obtain a slurry.

[0217] (2) Grind the slurry evenly stirred in step (1) with a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain the first mixture.

[0218] (3) Mix the remaining 1 / 2 of the high molecular fluorosilicone resin, nano anti-corrosion material and polyamide wax anti-settling aid evenly, and stir for 40 min to obtain the second mixture.

[0219] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoamer, and stir for 20 min to prepare component A.

[0220] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain component B.

[0221] (6) During spray construction, mix component A and component B evenly before use.

[0222] Comparative Example 1

[0223] This comparative example provides a high-temperature resistant heavy anti-corrosion fluorosilicone polymer coating, which is basically the same as Example 1, except that the molecular weight of the fluorosilicone resin synthesized in this comparative example is 5000.

[0224] Component A: 100 parts of fluorosilicone resin, 15 parts of nano anti-corrosion material, 12 parts of wear-resistant powder, 6 parts of rust-inhibiting pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoamer, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling aid.

[0225] Component B: 30 parts of 4,4'-methylenebis(cyclohexylamine), 5 parts of amino-silane coupling agent.

[0226] The molecular weight of the fluorosilicone resin used in this comparative example is about 5000.

[0227] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1000.

[0228] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5-10 nm.

[0229] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0230] The rust-inhibiting pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the rust-inhibiting pigment is 5-10 μm.

[0231] The silane coupling agent is 3-aminopropyltrimethoxysilane.

[0232] The preparation method of the amino fluorosilicone resin includes the following steps:

[0233] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and a hydrochloric acid solution with a mass concentration of 5% according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid being 100:2. Under argon protection, heat to 80 °C and react for 30 min to undergo a ring-opening polymerization reaction to obtain a trifluoropropylmethylchlorosilane polymer with a molecular weight of approximately 2000.

[0234] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to a molar ratio of 2:1. Gradually heat to 100 °C under argon protection for 30 min for preheating and dehydration. Then add a manganese catalyst accounting for 0.3% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and a neutralizing agent AMP95 accounting for 0.5% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane, and react at 150 °C under argon protection for 1 h to undergo a ring-opening polymerization reaction to form a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for 2 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin with a molecular weight of approximately 5000.

[0235] This comparative example also provides a preparation method for a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, including the following steps:

[0236] (1) Mix 1 / 3 of the high-molecular fluorosilicone resin, an organosilicon leveling agent, and a siloxane dispersant evenly, add wear-resistant powder and a functional anti-rust pigment, and stir for 20 min to obtain a slurry.

[0237] (2) Grind the slurry stirred evenly in step (1) with a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0238] (3) Mix the remaining 2 / 3 of the high-molecular fluorosilicone resin, a nano anti-corrosion material, and a polyamide wax anti-settling aid evenly, and stir for 40 min to obtain a second mixture.

[0239] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoaming agent, and stir for 20 min to prepare component A.

[0240] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain component B.

[0241] (6) During spray construction, mix component A and component B evenly before use.

[0242] Comparative Example 2

[0243] This comparative example provides a high-temperature resistant heavy-duty anti-corrosion fluorosilicone polymer coating, which is basically the same as Example 1, except that the molecular weight of the fluorosilicone resin synthesized in this comparative example is 20,000.

[0244] Component A: 100 parts of fluorosilicone resin, 15 parts of nano anti-corrosion material, 12 parts of wear-resistant powder, 6 parts of rust-inhibiting pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoamer, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling aid.

[0245] Component B: 30 parts of 4,4'-methylenebis(cyclohexylamine), 5 parts of amino silane coupling agent.

[0246] The molecular weight of the fluorosilicone resin used in this comparative example is about 20,000.

[0247] The molecular weight of 4,4'-methylenebis(cyclohexylamine) is about 1000.

[0248] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5-10 nm.

[0249] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0250] The rust-inhibiting pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the rust-inhibiting pigment is 5-10 μm.

[0251] The amino silane coupling agent is 3-aminopropyltrimethoxysilane.

[0252] The preparation method of the fluorosilicone resin includes the following steps:

[0253] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:2. Under argon protection, heat to 80 °C and react for 2 h to carry out ring-opening polymerization reaction to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 9000.

[0254] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly at a molar ratio of 2:1, and gradually heat to 100 °C under argon protection for 30 min of preheating and dehydration. Then add a manganese catalyst accounting for 0.3% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and a neutralizing agent AMP95 accounting for 0.5% of the total mass of the trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane, and react at 150 °C under argon protection for 4 h to undergo ring-opening polymerization to form a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, hold the temperature for 2 h, and cool to room temperature to prepare a stable high-molecular-weight fluorosilicone resin with a molecular weight of about 20,000.

[0255] This comparative example also provides a preparation method of a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, including the following steps:

[0256] (1) Mix 1 / 3 of the high-molecular-weight fluorosilicone resin, an organosilicon leveling agent, and a siloxane dispersant evenly, add wear-resistant powder and a functional anti-rust pigment, and stir for 20 min to obtain a slurry.

[0257] (2) Grind the slurry stirred evenly in step (1) with a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0258] (3) Mix the remaining 2 / 3 of the high-molecular-weight fluorosilicone resin, a nano anti-corrosion material, and a polyamide wax anti-settling aid evenly, and stir for 40 min to obtain a second mixture.

[0259] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoaming agent, and stir for 20 min to prepare component A.

[0260] (5) Mix 4,4'-methylenebis(cyclohexylamine) and an amino-silane coupling agent to obtain component B.

[0261] (6) During spraying construction, mix component A and component B evenly before use.

[0262] Comparative Example 3

[0263] This comparative example provides a high-temperature resistant and heavy-duty anti-corrosion fluorosilicone polymer coating, which is composed of the following components in parts by mass:

[0264] Component A: 100 parts of fluorosilicone resin, 15 parts of nano anti-corrosion material, 12 parts of wear-resistant powder, 6 parts of anti-rust pigment, 2 parts of siloxane dispersant, 1 part of polysiloxane defoaming agent, 2 parts of organosilicon leveling agent, 2 parts of polyamide wax anti-settling aid.

[0265] Component B: 30 parts of 4,4'-methylenebis(cyclohexylamine).

[0266] In this embodiment, the molecular weight of the fluorosilicone resin used is about 9000.

[0267] The molecular weight of 4-4'-subunit dicyclohexylamine is about 1000.

[0268] The nano anti-corrosion material is a mixture of nano-aluminum oxide and nano-iron oxide with a mass ratio of 1:1, and the particle size of the nano anti-corrosion material is 5-10 nm.

[0269] The wear-resistant powder is a mixture of wollastonite and zirconia with a mass ratio of 1:2.

[0270] The rust-inhibiting pigment is a mixture of zinc phosphate, aluminum tripolyphosphate and mica powder with a mass ratio of 1:1:1, and the particle size of the rust-inhibiting pigment is 5-10 μm.

[0271] The preparation method of the fluorosilicone resin includes the following steps:

[0272] (1) Weigh trifluoropropylmethylcyclotrisiloxane monomer and 5% hydrochloric acid solution according to the molar ratio of trifluoropropylmethylcyclotrisiloxane monomer to hydrochloric acid of 100:2. Under argon protection, heat to 80 °C and react for 2 h to carry out ring-opening polymerization reaction to obtain trifluoropropylmethylchlorosilane polymer with a molecular weight of about 4000.

[0273] (2) Mix the trifluoropropylmethylchlorosilane polymer obtained in step (1) and tetramethyltetravinylcyclotetrasiloxane evenly according to the molar ratio of 2:1. Under argon protection, gradually heat to 100 °C for preheating and dehydration for 30 min. Then add 0.3% manganese catalyst based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane and 0.5% neutralizer AMP95 based on the total mass of trifluoropropylmethylchlorosilane polymer and tetramethyltetravinylcyclotetrasiloxane. React at 150 °C under argon protection for 2 h to carry out ring-opening polymerization reaction to generate a macromolecular interpenetrating network fluorosilicone resin. Then lower the reaction temperature to 80 °C, keep the temperature for reaction for 2 h, and cool to room temperature to prepare a stable high-molecular fluorosilicone resin with a molecular weight of about 9000.

[0274] This comparative example also provides a preparation method of a high-temperature resistant heavy-duty anti-corrosion fluorosilicone polymer coating, including the following steps:

[0275] (1) Mix 1 / 3 of the high-molecular fluorosilicone resin, an organosilicon leveling agent and a siloxane dispersant evenly, add the wear-resistant powder and the rust-inhibiting pigment and stir for 20 min to obtain a slurry.

[0276] (2) Grind the slurry stirred evenly in step (1) through a sand mill until the fineness reaches below 10 μm, and stir for 40 min to obtain a first mixture.

[0277] (3) Mix the remaining 2 / 3 of the high molecular fluorosilicone resin, nano anti-corrosion material and polyamide wax anti-settling agent evenly and stir for 40 min to obtain the second mixture.

[0278] (4) Mix the first mixture prepared in step (2) and the second mixture prepared in step (3), add a polysiloxane defoaming agent, and stir for 20 min to prepare component A.

[0279] (5) Use 4,4'-methylenebis(cyclohexylamine) as component B.

[0280] (6) During spraying construction, mix component A and component B evenly before use.

[0281] The following is to prepare coatings according to the formulations of the examples and comparative examples for performance testing:

[0282] Prepare experimental specimens according to the following construction method, including the following steps:

[0283] (1) Carry out degreasing and derusting treatment on the carbon steel substrate to at least reach Sa2.0 level; control the construction environment at a temperature of 10°C to 35°C and a relative humidity < 90%.

[0284] (2) Adopt the airless spraying method and spray in multiple times to the specified film thickness. After the surface of each coating is dry, carry out the next spraying.

[0285] (3) Control the total wet film thickness of the coating to be 1 - 2 mm and the total dry film thickness of the coating to be 0.5 - 1 mm. After spraying is completed, dry at room temperature for 7 - 15 days to prepare a high-temperature resistant heavy-duty anti-corrosion fluorosilicone polymer coating.

[0286] Test the experimental specimens prepared in Examples 1 - 4 and Comparative Examples 1 - 3, and test the pencil hardness, adhesion strength, tensile strength, wear resistance, temperature resistance, 20% sulfuric acid immersion, 20% sodium hydroxide immersion, 5% sodium chloride salt spray test of the coating. The specific results are shown in Table 1.

[0287] Table 1 Performance results of experimental specimens It can be found from the test data in Table 1 that the coating provided by the present invention has excellent hardness, adhesion strength, tensile strength, wear resistance, temperature resistance and corrosion resistance. Specifically, through the selection of the coating composition and ratio, especially through the combined use of fluorine-modified silicone resin, nano anti-corrosion material, wear-resistant powder and functional anti-rust pigment, the anti-corrosion and wear-resistant properties of the coating are significantly enhanced, and it can be applied to complex environments of high temperature, wear and corrosion.

[0288] From the experimental data in Table 1, it can be found that in Example 2, less resin and more powder are selected, increasing the pigment-volume concentration (PVC) of the coating, which leads to a certain decrease in the bond strength and tensile strength compared to Example 1. This shows that the combination of PVC plays an important role in the bond strength and tensile strength of the coating, and the addition amount of pigments and fillers should not be too much.

[0289] In Example 3, a single and low-cost nano anti-corrosion material, wear-resistant powder, and functional anti-rust pigment are selected, resulting in a significant decrease in wear resistance and a slight whitening phenomenon in corrosion resistance compared to Example 1. This indicates that the combination of various powders plays an important and indispensable role in wear resistance and corrosion resistance.

[0290] In Example 4, the silane coupling agent selected is N-(β-aminoethyl-γ-aminopropyl)methylsilane, which has a faster drying speed and crosslinking density. As a result, there is a significant improvement in the pencil hardness and wear resistance compared to Example 1, indicating that selecting a more excellent silane coupling agent can enhance the overall crosslinking density of the coating.

[0291] After changing the molecular weight in Examples 5, 6, 7, and 8, the coating properties show little difference, indicating that during the synthesis of fluorosilicone resin, controlling the molecular weight between 8000 - 12000 meets the quality and performance requirements.

[0292] In Comparative Example 1, a fluorosilicone resin with a molecular weight of 5000 is selected. The coating hardness increases, but the bond strength, tensile strength, and wear resistance all show a significant decrease, indicating that too small a molecular weight will lead to a decrease in the overall density of the coating.

[0293] In Comparative Example 2, a fluorosilicone resin with a molecular weight of 20000 is selected. The coating hardness shows an obvious decrease, and the bond strength also decreases accordingly, but the tensile strength increases. The coating as a whole shows defects such as slower drying and insufficient crosslinking degree, making the coating structure relatively soft and the chemical resistance performance showing a significant decrease, indicating that too large a molecular weight will lead to insufficient crosslinking strength of the coating, a decrease in hardness, and poor performance.

[0294] In Comparative Example 3, 4,4'-methylenebis(cyclohexylamine) is selected as the curing agent component alone, and the hardness, bond strength, tensile strength, and wear resistance all show an obvious decrease, indicating that without adding a silane coupling agent, incomplete drying at room temperature will occur, and the addition of a silane coupling agent is essential.

[0295] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0296] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating, characterized in that, It is made from the following components in parts by mass: 80 to 100 parts of fluorosilicone resin, 10 to 15 parts of nano anti-corrosion material, 5 to 15 parts of wear-resistant powder, 5 to 10 parts of anti-rust pigment, 1 to 2 parts of siloxane dispersant, 1 to 2 parts of polysiloxane defoamer, 1 to 2 parts of silicone leveling agent, 1 to 3 parts of polyamide wax anti-settling agent, 25 to 35 parts of amino curing agent, and 2 to 5 parts of amino silane coupling agent; The fluorosilicone resin has a molecular weight of 8000 to 12000 and is a fluorosilicone resin containing silicon-oxygen bonds; The preparation method of the fluorosilicone resin includes the following steps: Under an inert atmosphere, add trifluoropropylmethylcyclotrisiloxane to hydrochloric acid solution, and carry out the first ring-opening polymerization reaction at 80°C to 100°C to obtain trifluoropropylmethylchloroazane polymer; Under an inert atmosphere, mix trifluoropropylmethylchloroazane polymer and tetramethyltetravinylcyclotetrasiloxane, preheat and dehydrate at 80°C to 100°C, then add a catalyst and a neutralizer, and carry out the second ring-opening polymerization reaction at 150°C to 160°C to generate an interpenetrating network fluorosilicone resin. Then, lower the temperature to 80°C to 90°C for heat preservation reaction, and then cool to room temperature to prepare the fluorosilicone resin.

2. The high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating according to claim 1, wherein The molar ratio of trifluoropropylmethylcyclotrisiloxane to hydrochloric acid solution is 100:2 to 3; the reaction time of the first ring-opening polymerization reaction is 1h to 2h.

3. The high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating according to claim 1, characterized in that, The molar ratio of trifluoropropylmethylchloroazane polymer to tetramethyltetravinylcyclotetrasiloxane is 2:1 to 1.5; the reaction time of the second ring-opening polymerization reaction is 2h to 3h.

4. A high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating according to claim 1, characterized in that, The addition amount of the catalyst is 0.3% to 0.4% of the total mass of trifluoropropylmethylchloroazane polymer and tetramethyltetravinylcyclotetrasiloxane.

5. The high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating according to claim 1, wherein The addition amount of the neutralizer is 0.5% to 0.6% of the total mass of trifluoropropylmethylchloroazane polymer and tetramethyltetravinylcyclotetrasiloxane.

6. The high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating according to claim 1, wherein The catalyst is a manganese catalyst; the neutralizer is AMP95.

7. The high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating according to claim 1, characterized in that, The nano anti-corrosion material is one or more of nano-aluminum oxide, nano-iron oxide, nano-magnesium oxide, nano-titanium dioxide, and nano-silica gel; The wear-resistant powder is one or more of silicon carbide, wollastonite, zirconia, white fused alumina, and glass powder; The anti-rust pigment is one or more of zinc phosphate, aluminum tripolyphosphate, mica powder, and iron oxide.

8. A method for preparing a high-temperature resistant and heavy-duty anti-corrosion fluorosilicon polymer coating according to any one of claims 1 to 7, characterized in that, The preparation is carried out according to the following steps: Weigh each component according to the following parts by mass: 80 to 100 parts of fluorosilicone resin, 10 to 15 parts of nano anti-corrosion material, 5 to 15 parts of wear-resistant powder, 5 to 10 parts of anti-rust pigment, 1 to 2 parts of siloxane dispersant, 1 to 2 parts of polysiloxane defoamer, 1 to 2 parts of silicone leveling agent, 1 to 3 parts of polyamide wax anti-settling agent, 25 to 35 parts of amino curing agent, and 2 to 5 parts of amino silane coupling agent; Take 1 / 3 to 1 / 2 of the fluorosilicone resin, silicone leveling agent, siloxane dispersant, wear-resistant powder, and anti-rust pigment, mix them evenly, grind them, and then add the remaining fluorosilicone resin and mix evenly to obtain the first mixture; Mix the remaining fluorosilicone resin, nano anti-corrosion material, and polyamide wax anti-settling agent evenly to obtain the second mixture; After mixing the first mixture and the second mixture, add the polysiloxane defoamer and stir evenly to obtain component A; Mix the amino curing agent and the amino silane coupling agent to obtain Component B; During spraying, stir Component A and Component B evenly to obtain the high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating.

9. Use of the high-temperature resistant heavy anti-corrosion fluorosilicon polymer coating according to any one of claims 1 to 7 in the preparation of an anti-corrosion material, characterized in that, It includes the following steps: After degreasing and derusting the substrate, spray the high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating on the surface of the substrate, control the total wet film thickness of the coating to be 1 mm to 2 mm, and the total dry film thickness of the coating to be 0.5 mm to 1 mm. After spraying, dry at room temperature for 7 days to 15 days to prepare the high-temperature resistant heavy-duty anti-corrosion fluorosilicon polymer coating.

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