Fluorine-silicon-boron nitride two-component coating as well as preparation method and application thereof

Abstract

The invention discloses a preparation method of a fluorine-silicon-boron nitride two-component coating, which comprises the following steps: S1, preparing a component A: mixing a fluorine-silicon polymer and hydrogenated epoxy resin, and dispersing into a uniform liquid state; adding boron nitride, a dispersing agent, a defoaming agent, a base material wetting agent, a flatting agent and a thixotropic agent into the mixed solution, and continuously dispersing; adding nano titanium dioxide, and dispersing at a high speed until the fineness reaches the standard; adding a light stabilizer / light absorbent and a mixed solvent, and continuously dispersing into uniform liquid to obtain a component A; s2, preparing a component B: mixing an organic silicon curing agent and a mixed solvent, and uniformly dispersing to obtain the component B; the invention also discloses a corresponding fluorine-silicon-boron nitride two-component coating and application thereof. By implementing the invention, the obtained coating has good thermal conductivity, insulativity, corrosion resistance and adhesive force, and can effectively prolong the service life of electrical equipment.

Description

Technical Field

[0001] The invention relates to the technical field of coatings applied to power equipment, and in particular to a fluorine-silicon-boron nitride two-component coating, a preparation method and application thereof. Background Art

[0002] During the operation of power equipment, its surface is susceptible to a variety of harsh environmental factors, including high temperature, high humidity, ultraviolet radiation and chemical corrosion. Traditional power equipment coatings mostly use epoxy resins, polyurethane and other materials. Although these materials can meet basic insulation and protection needs to a certain extent, their performance will gradually degrade under long-term high temperature, high pressure and electric field, resulting in reduced insulation and protection performance, and even cracking, peeling and other problems.

[0003] In order to improve the weather resistance, corrosion resistance and insulation of power equipment, there is an urgent need for a coating with excellent performance for protection. Currently, the coating products on the market often cannot fully meet the use requirements of power equipment in extreme environments. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a fluorine-silicon-boron nitride two-component coating, a preparation method and application thereof. The coating has good thermal conductivity, insulation, corrosion resistance and good adhesion, and can effectively extend the service life of power equipment.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: As a first aspect of the present invention, a fluorine silicon boron nitride two-component coating is provided, which comprises, by weight, at least:

[0006] Component A:

[0007] 30-45 parts of fluorosilicone polymer;

[0008] 10-20 parts of hydrogenated epoxy resin;

[0009] Boron nitride 5-10 parts;

[0010] As well as dispersants, defoamers, substrate wetting agents, leveling agents, thixotropic agents, nano titanium dioxide, light stabilizers / light absorbers and mixed solvents;

[0011] Component B:

[0012] 50-70 parts of organosilicon curing agent; and mixed solvent;

[0013] During construction, component A and component B in the coating are mixed evenly.

[0014] Optionally, in component A, the weight proportions of each material are:

[0015] 2 to 5 parts of dispersant;

[0016] Defoaming agent 0.3-0.6 parts;

[0017] 0.2-0.5 parts of substrate wetting agent;

[0018] 0.5-1 part of leveling agent;

[0019] Thixotropic agent 0.3-0.6 parts;

[0020] 15-20 parts of nano titanium dioxide;

[0021] Light stabilizer / light absorber 1 to 3 parts;

[0022] 10 to 15 parts of mixed solvent.

[0023] Optionally, the mixed solvent in component B is butyl acetate, and its weight proportion is 30 to 50 parts.

[0024] Accordingly, as another aspect of the present invention, a method for preparing a fluorine-silicon-boron nitride two-component coating is also provided, which comprises the following steps:

[0025] Step S1, preparing component A:

[0026] Mix the fluorosilicone polymer and the hydrogenated epoxy resin and disperse them into a uniform liquid state;

[0027] Add boron nitride, dispersant, defoamer, substrate wetting agent, leveling agent, thixotropic agent to the mixed solution and continue to disperse;

[0028] Add nano titanium dioxide and disperse at high speed until the fineness reaches the standard;

[0029] Adding a light stabilizer / light absorber and a mixed solvent, and continuing to disperse until a uniform liquid is obtained to obtain a mixture A;

[0030] Step S2, preparing component B:

[0031] The organosilicon curing agent and the mixed solvent are mixed and dispersed to be uniform to obtain component B.

[0032] Optionally, in step S1, the rotation speed when mixing the fluorosilicone polymer and the hydrogenated epoxy resin is controlled at 800 rpm, and the dispersion time is 15 minutes.

[0033] Optionally, in step S1, the dispersion speed after adding boron nitride, dispersant, defoamer, substrate wetting agent, leveling agent, and thixotropic agent to the mixed solution is 550 rpm and the dispersion time is 10 minutes;

[0034] In step S1, after adding nano titanium dioxide, the speed of high-speed dispersion is 1000 rpm, and the dispersion time is 40 minutes, until the fineness is ≤20um;

[0035] In step S1, after adding the light stabilizer / light absorber and the mixed solvent, the dispersion speed is 600 rpm and the dispersion is carried out for 10 minutes.

[0036] Optionally, the step S2 is specifically:

[0037] The organosilicon curing agent and butyl acetate were put into a dispersion tank and mixed at 500 rpm. After dispersion for 15 minutes, component B was obtained.

[0038] Correspondingly, as another aspect of the present invention, an application of a fluorine silicon boron nitride two-component coating is also provided, characterized in that the coating as described above is applied to the main body casing of the power equipment and its accessory metal parts for corrosion protection or equipment phase color spraying.

[0039] Optionally, the power equipment includes power transformers, combined electrical appliances, circuit breakers, disconnectors, mutual inductors, lightning arresters and capacitors.

[0040] The implementation of the embodiments of the present invention has the following beneficial effects:

[0041] The present invention provides a fluorine-silicon-boron nitride two-component coating, a preparation method and an application thereof. In the present invention, due to the addition of fluorine-silicon polymer and nano-titanium dioxide, the coating can resist the influence of harsh environmental factors such as high temperature, high humidity, ultraviolet radiation and chemical corrosion.

[0042] In the present invention, boron nitride is used as a thermally conductive filler, which effectively improves the thermal conductivity of the coating and helps to dissipate heat during the operation of the power equipment.

[0043] In the present invention, a combination of hydrogenated epoxy resin and fluorosilicone polymer is used to provide the coating with good insulation performance, thereby meeting the high insulation requirements of power equipment.

[0044] In the present invention, due to the synergistic effect of the substrate wetting agent and the hydrogenated epoxy resin, the coating can be firmly attached to the surface of the electric equipment and is not easy to fall off.

[0045] In the present invention, due to the addition of thixotropic agent, leveling agent and defoaming agent, the coating is easy to control during the construction process, and a smooth and uniform coating can be obtained.

[0046] In summary, the technical solution of the present invention provides a protective coating with excellent performance for power equipment, effectively prolongs the service life of the power equipment, and has important practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0048] Figure 1 The main process diagram of an embodiment of a method for preparing a fluorine-silicon-boron nitride two-component coating provided by the present invention is shown. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] The present invention provides a fluorine silicon boron nitride two-component coating, which comprises, by weight, at least:

[0051] Component A:

[0052] 30-45 parts of fluorosilicone polymer;

[0053] 10-20 parts of hydrogenated epoxy resin;

[0054] Boron nitride 5-10 parts;

[0055] As well as dispersants, defoamers, substrate wetting agents, leveling agents, thixotropic agents, nano titanium dioxide, light stabilizers / light absorbers and mixed solvents;

[0056] Component B:

[0057] 50-70 parts of organosilicon curing agent; and mixed solvent;

[0058] During construction, component A and component B in the coating are mixed evenly.

[0059] Optionally, in component A, the weight proportions of each material are:

[0060] 2 to 5 parts of dispersant;

[0061] Defoaming agent 0.3-0.6 parts;

[0062] 0.2-0.5 parts of substrate wetting agent;

[0063] 0.5-1 part of leveling agent;

[0064] Thixotropic agent 0.3-0.6 parts;

[0065] 15-20 parts of nano titanium dioxide;

[0066] Light stabilizer / light absorber 1 to 3 parts;

[0067] 10 to 15 parts of mixed solvent.

[0068] Optionally, the mixed solvent in component B is butyl acetate, and its weight proportion is 30 to 50 parts.

[0069] Specifically, the fluorine silicon boron nitride two-component coating includes the components shown in Table 1 below in parts by weight:

[0070] Table 1

[0071] raw material Weight Component A: Fluorosilicone polymer 30~45 servings Hydrogenated epoxy resin 10~20 servings Boron Nitride 5-10 servings Dispersants 2-5 servings Defoaming agent 0.3~0.6 Substrate wetting agent 0.2~0.5 Leveling agent 0.5~1 serving Thixotropic agent 0.3~0.6 Nano Titanium Dioxide 15-20 servings Light Stabilizer / Light Absorber 1~3 servings Mixed solvents 10-15 servings; Component B: Silicone curing agent 50~70 servings Mixed solvents 30-50 servings;

[0072] In actual examples, the contents of each component of the fluorine silicon boron nitride two-component coating are different.

[0073] Embodiment 1:

[0074] The contents of each component of the fluorine silicon boron nitride two-component coating in Example 1 are shown in Table 2 below.

[0075] Table 2

[0076]

[0077]

[0078] Embodiment 2:

[0079] The contents of each component of the fluorine silicon boron nitride two-component coating in Example 2 are shown in Table 3 below.

[0080] Table 3

[0081] raw material Weight Component A: Fluorosilicone polymer 45 servings Hydrogenated epoxy resin 20 servings Boron Nitride 10 servings Dispersants 5 servings Defoaming agent 0.6 parts Substrate wetting agent 0.5 serving Leveling agent 1 serving Thixotropic agent 0.6 parts Nano Titanium Dioxide 20 servings Light Stabilizer / Light Absorber 3 servings Mixed solvents 15 servings; Component B: Silicone curing agent 70 servings Mixed solvents 50 copies;

[0082] Embodiment 3:

[0083] The contents of each component of the fluorine silicon boron nitride two-component coating in Example 3 are shown in Table 4 below.

[0084] Table 4

[0085]

[0086]

[0087] It is understandable that in the fluorine silicon boron nitride two-component coating provided by the present invention, the composition and function of each component are as follows:

[0088] For component A, where:

[0089] Fluorosilicone polymers are used to provide coatings with excellent weather resistance, corrosion resistance, water resistance and good hydrophobicity. Hydrogenated epoxy resins are used to enhance the adhesion and mechanical strength of coatings, while providing certain insulation properties. Boron nitride is used as a thermally conductive filler, which significantly improves the thermal conductivity of coatings and helps dissipate heat. Dispersants are used to help solid particles disperse evenly in liquids to prevent agglomeration. Defoamers are used to prevent bubbles from forming during the preparation and application of coatings. Substrate wetting agents are used to improve the wettability of coatings to substrates and improve adhesion. Leveling agents are used to enable coatings to level quickly after application to obtain a smooth surface. Thixotropic agents are used to give coatings thixotropy, that is, they are thick when stationary and become thinner when stirred, which is convenient for construction. Nano titanium dioxide is used to improve the weather resistance and UV resistance of coatings, while enhancing the whiteness and hiding power of coatings. Light stabilizers / light absorbers are used to protect coatings from UV damage and extend their service life. Mixed solvents are used to adjust the viscosity of coatings for easy construction.

[0090] For component B, the organosilicon curing agent is used to react with the resin in component A to form a cross-linked structure to improve the hardness, chemical resistance and weather resistance of the coating. The mixed solvent is used to adjust the viscosity of the curing agent to facilitate mixing with component A.

[0091] At the same time, in this scheme, there are interactions between the ingredients of each component, which together contribute to the beneficial effects of the coating, among which:

[0092] Fluorosilicone polymer and hydrogenated epoxy resin: Both are the main film-forming substances of the coating. Fluorosilicone polymer provides excellent weather resistance, corrosion resistance and water resistance, while hydrogenated epoxy resin enhances the adhesion and mechanical strength of the coating. The interaction between them makes the coating have both the weather resistance of fluorosilicone polymer and the good adhesion of epoxy resin.

[0093] Addition of Boron Nitride: Boron Nitride, as a thermal conductive filler, can significantly improve the thermal conductivity of the coating. Forming a thermal conductive network in the coating helps the power equipment to dissipate heat during operation, reduce the temperature, and thus extend the service life of the equipment.

[0094] The role of dispersants, defoamers, substrate wetting agents, leveling agents, and thixotropic agents: These additives play a key regulatory role in coatings. Dispersants ensure that solid particles are evenly dispersed in liquids; defoamers prevent bubbles from forming during the preparation and application of coatings; substrate wetting agents improve the wettability of coatings to substrates; leveling agents enable coatings to level quickly after application to obtain a smooth surface; and thixotropic agents give coatings thixotropy for ease of construction. Nano-titanium dioxide and light stabilizers / light absorbers:

[0095] Nano-titanium dioxide improves the weather resistance and UV resistance of the coating, while enhancing the whiteness and hiding power of the coating. Light stabilizers / light absorbers protect the coating from UV damage and extend its service life. The two work together to give the coating excellent aging resistance.

[0096] Mixing of component A and component B: When component A is mixed with component B, the silicone curing agent undergoes a cross-linking reaction with the fluorosilicone polymer, hydrogenated epoxy resin, etc. to form a tough, dense coating. This cross-linking process improves the hardness, chemical resistance, and weather resistance of the coating.

[0097] The various properties of the fluorine silicon boron nitride two-component coating provided by the present invention were tested. The coating has good thermal conductivity, insulation, corrosion resistance and good adhesion, and can effectively extend the service life of power equipment. Please see Table 5 for specific test items, conditions and reference standards.

[0098] Table 5 Test contents involved in the present invention

[0099]

[0100]

[0101] like Figure 1 FIG. 1 is a schematic diagram showing the main process of an embodiment of a method for preparing a fluorine-silicon-boron-nitride two-component coating provided by the present invention. In this embodiment, the method comprises the following steps:

[0102] Step S1, preparing component A:

[0103] The fluorosilicone polymer and the hydrogenated epoxy resin are mixed and dispersed into a uniform liquid state; in this step, the rotation speed is controlled at 800 rpm and the dispersion time is 15 minutes.

[0104] Add boron nitride, dispersant, defoamer, substrate wetting agent, leveling agent, and thixotropic agent to the mixed solution, and continue to disperse; the dispersion speed in this step is 550 rpm, and the dispersion time is 10 minutes;

[0105] Add nano titanium dioxide and disperse at high speed until the fineness meets the standard; in this step, the speed of high-speed dispersion is 1000 rpm, the dispersion time is 40 minutes, and the fineness is ≤20um.

[0106] Add a light stabilizer / light absorber and a mixed solvent, and continue to disperse until a uniform liquid is obtained to obtain a mixture A. In this step, the dispersion speed is 600 rpm, and the dispersion time is 10 minutes until a uniform liquid is obtained;

[0107] Step S2, preparing component B:

[0108] The organosilicon curing agent and the mixed solvent are mixed and dispersed to be uniform to obtain component B. Specifically, the organosilicon curing agent and butyl acetate are put into a dispersion tank and mixed at 500 rpm for 15 minutes to obtain component B.

[0109] It is understandable that the weight percentages of the components in each step are the same as those in the various embodiments of the aforementioned fluorine silicon boron nitride two-component coating.

[0110] It is understood that in the embodiment of the present invention, when preparing component A, the rotation speed and dispersion time are controlled to ensure that the components are fully mixed and evenly dispersed. In particular, the addition of nano titanium dioxide requires high-speed dispersion to ensure that its particles are fully dispersed in the coating to avoid agglomeration.

[0111] The preparation of component B is relatively simple, and only requires the organic silicon curing agent and the mixed solvent to be mixed evenly. This simplified preparation process helps to improve efficiency and reduce production costs.

[0112] The two-component design allows the coating to maintain stable performance before use. Component A and component B are stored separately before mixing, avoiding performance degradation caused by premature mixing. At the same time, the two-component design also makes it easy to adjust the performance of the coating according to actual needs, such as changing the curing speed and hardness of the coating by adjusting the ratio of components A and B.

[0113] As another aspect of the present invention, an application of a fluorine-silicon-boron-nitride two-component coating is also provided, which applies the above-described fluorine-silicon-boron-nitride two-component coating to the main body shell of the power equipment and its accessory metal parts for corrosion protection or equipment phase color spraying. Wherein, the power equipment includes power transformers, combination electrical appliances, circuit breakers, disconnectors, mutual inductors, lightning arresters and capacitors, etc. For more details, reference can be made to and combined with the above-mentioned description of the fluorine-silicon-boron-nitride two-component coating and the preparation method, which will not be repeated here.

[0114] The implementation of the embodiments of the present invention has the following beneficial effects:

[0115] The present invention provides a fluorine-silicon-boron nitride two-component coating, a preparation method and an application thereof. In the present invention, due to the addition of fluorine-silicon polymer and nano-titanium dioxide, the coating can resist the influence of harsh environmental factors such as high temperature, high humidity, ultraviolet radiation and chemical corrosion.

[0116] In the present invention, boron nitride is used as a thermally conductive filler, which effectively improves the thermal conductivity of the coating and helps to dissipate heat during the operation of the power equipment.

[0117] In the present invention, a combination of hydrogenated epoxy resin and fluorosilicone polymer is used to provide the coating with good insulation performance, thereby meeting the high insulation requirements of power equipment.

[0118] In the present invention, due to the synergistic effect of the substrate wetting agent and the hydrogenated epoxy resin, the coating can be firmly attached to the surface of the electric equipment and is not easy to fall off.

[0119] In the present invention, due to the addition of thixotropic agent, leveling agent and defoaming agent, the coating is easy to control during the construction process, and a smooth and uniform coating can be obtained.

[0120] In summary, the technical solution of the present invention provides a protective coating with excellent performance for power equipment, effectively prolongs the service life of the power equipment, and has important practical application value.

[0121] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A fluorine silicon boron nitride two-component coating, characterized in that: Calculated by weight, at least comprising: Component A: 30-45 parts of fluorosilicone polymer; 10-20 parts of hydrogenated epoxy resin; Boron nitride 5-10 parts; As well as dispersants, defoamers, substrate wetting agents, leveling agents, thixotropic agents, nano titanium dioxide, light stabilizers / light absorbers and mixed solvents; Component B: 50-70 parts of organosilicon curing agent; and mixed solvent; During construction, component A and component B in the coating are mixed evenly.

2. The fluorine silicon boron nitride two-component coating according to claim 1, characterized in that: In component A, the weight proportions of each material are: 2 to 5 parts of dispersant; Defoaming agent 0.3-0.6 parts; 0.2-0.5 parts of substrate wetting agent; 0.5-1 part of leveling agent; Thixotropic agent 0.3-0.6 parts; 15-20 parts of nano titanium dioxide; Light stabilizer / light absorber 1 to 3 parts; 10 to 15 parts of mixed solvent.

3. The fluorine silicon boron nitride two-component coating according to claim 1, characterized in that: The mixed solvent in component B is butyl acetate, and its weight proportion is 30 to 50 parts.

4. A method for preparing a fluorine-silicon-boron-nitride two-component coating, characterized in that: The following steps are involved: Step S1, preparing component A: Mix the fluorosilicone polymer and the hydrogenated epoxy resin and disperse them into a uniform liquid state; Add boron nitride, dispersant, defoamer, substrate wetting agent, leveling agent, thixotropic agent to the mixed solution and continue to disperse; Add nano titanium dioxide and disperse at high speed until the fineness reaches the standard; Adding a light stabilizer / light absorber and a mixed solvent, and continuing to disperse until a uniform liquid is obtained to obtain component A; Step S2, preparing component B: The organosilicon curing agent and the mixed solvent are mixed and dispersed to be uniform to obtain component B.

5. The method for preparing the fluorine silicon boron nitride two-component coating according to claim 4, characterized in that: In step S1, the rotation speed when mixing the fluorosilicone polymer and the hydrogenated epoxy resin is controlled at 800 rpm, and the dispersion time is 15 minutes.

6. The method for preparing the fluorine silicon boron nitride two-component coating according to claim 5, characterized in that: In step S1, the dispersion speed after adding boron nitride, dispersant, defoamer, substrate wetting agent, leveling agent, and thixotropic agent to the mixed solution is 550 rpm and the dispersion time is 10 minutes; And in step S1, after adding nano titanium dioxide, the speed of high-speed dispersion is 1000 rpm, the dispersion time is 40 minutes, until the fineness is ≤20um; In step S1, after adding the light stabilizer / light absorber and the mixed solvent, the dispersion speed is 600 rpm and the dispersion is carried out for 10 minutes.

7. The method for preparing the fluorine-silicon-boron-nitride two-component coating according to claim 6, characterized in that: The step S2 is specifically as follows: The organosilicon curing agent and butyl acetate were put into a dispersion tank and mixed at 500 rpm. After dispersion for 15 minutes, component B was obtained.

8. The method for preparing the fluorine silicon boron nitride two-component coating according to any one of claims 4 to 7, characterized in that: The weight percentages of the ingredients in each step are the same as those in the coating according to any one of claims 1 to 3.

9. An application of a fluorine silicon boron nitride two-component coating, characterized in that: The coating as claimed in any one of claims 1 to 3 is applied to the main body shell of the electric equipment and its accessory metal parts for corrosion protection or equipment phase color spraying.

10. The use of the fluorine silicon boron nitride two-component coating according to claim 9, characterized in that: The electric power equipment includes power transformers, combined electrical appliances, circuit breakers, disconnectors, mutual inductors, lightning arresters and capacitors.

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