A dealcoholized mildew-proof anti-flash coating and a preparation method and application thereof

Abstract

The application discloses a dealcoholized mildew-proof anti-flash coating and a preparation method and application thereof, and belongs to the technical field of mildew-proof coatings. The coating comprises, in weight percentage, alkoxysilicone oil, inorganic filler, cross-linking agent, catalyst, curing accelerator, coupling agent, structure control agent and mildew-proof agent. The mildew-proof agent comprises BiM hollow silica material, octadecyl trimethyl ammonium chloride and inorganic silicate. The preparation method comprises the following steps: taking the alkoxysilicone oil, adding the inorganic filler into the alkoxysilicone oil, and then stirring; after uniform stirring, the structure control agent and the coupling agent are added to obtain a mixed solution; the cross-linking agent, the curing accelerator, the mildew-proof agent and the catalyst are sequentially added into the mixed solution, and then stirring is conducted to obtain a composite glue; and finally, filtration is conducted to obtain the dealcoholized mildew-proof anti-flash coating. The dealcoholized mildew-proof anti-flash coating and the preparation method thereof can inhibit the growth of mildew and achieve the effect of long-acting mildew prevention, and the service life is improved under harsh conditions.

Description

Technical Field

[0001] This invention relates to a de-alcoholized anti-mildew and anti-flashover coating, its preparation method and application, belonging to the field of anti-mildew coating technology. Background Technology

[0002] However, existing anti-flashover coatings have been found to exhibit reduced external insulation levels, shortened lifespan, and severe aging failure during spraying and service, especially in harsh environments such as warm and humid southern regions. Currently available conventional anti-flashover coatings, when exposed to harsh conditions for extended periods, are prone to mold growth, which damages the coating structure, leading to chalking, peeling, loss of protective and decorative functions, and environmental pollution. Furthermore, most inorganic anti-mold agents lack durability and gradually lose their anti-mold effect over long-term use, thus failing to achieve long-lasting anti-mold protection. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a de-alcoholized anti-mildew and anti-flashover coating, its preparation method and application, which can inhibit mold growth and prevent mold, achieve long-term anti-mildew effect, and improve service life under harsh conditions.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present invention provides a de-alcoholized anti-mildew and anti-flashover coating, comprising, by weight, 80-100 parts of alkoxy silicone oil, 40-75 parts of inorganic filler, 3-7 parts of crosslinking agent, 0.2-0.5 parts of catalyst, 1-3 parts of curing accelerator, 0.5-3 parts of coupling agent, 10-100 parts of structure control agent and 0.5-3 parts of anti-mildew agent, wherein the anti-mildew agent comprises BiM polyhollow silica, octadecyltrimethylammonium chloride and inorganic silicate in a mass ratio of 6-10:1.5-3.5:1-2.

[0006] The alkoxy silicone oil includes one or more of the following: hydrogen-terminated polysiloxane, methoxyvinyl polysiloxane, methoxyfluorinated polysiloxane, and methoxydimethylsiloxane.

[0007] The inorganic filler includes one or more of the following: nano-titanium dioxide, aluminum hydroxide, iron hydroxide, silica, silicon carbide, alumina, aluminum nitride, calcined gypsum, boron nitride, silicon carbide, clay, silica powder, asbestos wool, and calcium carbonate.

[0008] The catalyst includes one or more of platinum catalyst, tetrabutyl titanate, ethyl acetoacetate, and tetramethylammonium hydroxide.

[0009] The crosslinking agent includes one or more of methyltrimethoxysilane, vinyltrimethoxysilane, hydroxyl-terminated hyperbranched polysiloxane, methyl orthosilicate, phenyltrimethoxysilane, aniline methyltrimethoxysilane, diethylamine methyltrimethoxysilane, and propyltrimethoxysilane.

[0010] The coupling agent includes one or more of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

[0011] The structure control agent includes one or more of vinyl silicone oil, hydroxy silicone oil, diphenylsilanediol, hexamethyldisilazane, and cyclic trisilane.

[0012] The curing accelerator includes one or more of dihexylamine, N-methylimidazole, and dimethyl sulfoxide.

[0013] Secondly, the present invention provides a method for preparing a de-alcoholized, mildew-resistant, and flashover-resistant coating, comprising the following steps:

[0014] Inorganic silicate is dissolved in water and stirred for 8-12 minutes to adjust the pH to 5-8. Then, octadecyltrimethylammonium chloride is added, the temperature is raised to 50-80℃, and the reaction is carried out for 1.5-2.5 hours. After filtration, BiM hollow silica material is added to the filtrate, dried, and ground into powder to obtain the antifungal agent.

[0015] Take alkoxy silicone oil, add inorganic filler to it, stir, and after stirring evenly, add structure control agent and coupling agent to obtain a mixed solution;

[0016] Then, add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 3-5 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-flashover coating.

[0017] Thirdly, this invention provides the application of de-alcoholized anti-mildew and anti-flashover coatings in power equipment.

[0018] The beneficial effects of this invention are as follows: This invention provides a dealcohol-based anti-mildew and anti-flashover coating, its preparation method, and its application. The anti-mildew agent in the coating includes BiM hollow silica, octadecyltrimethylammonium chloride, and inorganic silicate in a mass ratio of 6~10:1.5~3.5:1~2. The BiM hollow silica does not provide a breeding environment for parasites and fungi, thus inhibiting mold growth. Furthermore, the inorganic silicate adsorbs mold onto the coating surface through its charge. The inorganic silicate then directly acts on the mold cell membrane, disrupting its structure and penetrating the cell to enter the fungal body. This causes protein denaturation and ultimately disrupts the activity of the mold cell's synthetic enzymes, affecting its entire metabolic process and causing it to lose its ability to divide and proliferate, leading to death. In summary, this invention can inhibit mold growth and prevent mold growth, achieving a long-lasting anti-mildew effect and extending service life under harsh conditions. Detailed Implementation

[0019] The present invention will be further described below. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the scope of protection of the present invention.

[0020] Example 1

[0021] The alcohol-based anti-mildew and anti-flashover coating provided in this embodiment comprises the following components by weight:

[0022]

[0023] The antifungal agent includes BiM hollow silica, octadecyltrimethylammonium chloride and inorganic silicate in a mass ratio of 6:1.5:2.

[0024] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0025] Step 1: Dissolve inorganic silicate in water, mix and stir for 8 minutes, and adjust the pH to 8; then add octadecyltrimethylammonium chloride, heat to 50℃, react for 2.5 hours, then filter, take the filtrate, add BiM polyhollow silica material, dry, grind into powder to obtain antifungal agent.

[0026] Step 2: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0027] Step 3: Add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 3 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-fouling flashover coating.

[0028] Example 2

[0029] The alcohol-based anti-mildew and anti-flashover coating provided in this embodiment comprises the following components by weight:

[0030]

[0031] The antifungal agent includes BiM hollow silica, octadecyltrimethylammonium chloride and inorganic silicate in a mass ratio of 8:2:1.

[0032] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0033] Step 1: Dissolve inorganic silicate in water, mix and stir for 12 minutes, and adjust the pH to 8; then add octadecyltrimethylammonium chloride, heat to 80℃, react for 1.5 hours, then filter, take the filtrate, add BiM polyhollow silica material, dry, grind into powder to obtain antifungal agent.

[0034] Step 2: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0035] Step 3: Add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 4 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-fouling flashover coating.

[0036] Example 3

[0037] The alcohol-based anti-mildew and anti-flashover coating provided in this embodiment comprises the following components by weight:

[0038]

[0039] The antifungal agent comprises BiM hollow silica, octadecyltrimethylammonium chloride, and inorganic silicate in a mass ratio of 10:3.5:1.5.

[0040] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0041] Step 1: Dissolve inorganic silicate in water, mix and stir for 10 minutes, and adjust the pH to 7; then add octadecyltrimethylammonium chloride, heat to 60℃, react for 2 hours, then filter, take the filtrate, add BiM polyhollow silica material, dry, grind into powder to obtain antifungal agent.

[0042] Step 2: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0043] Step 3: Add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 5 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-fouling flashover coating.

[0044] Example 4

[0045] The alcohol-based anti-mildew and anti-flashover coating provided in this embodiment comprises the following components by weight:

[0046]

[0047] The antifungal agent comprises BiM hollow silica, octadecyltrimethylammonium chloride, and inorganic silicate in a mass ratio of 6:2:2.

[0048] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0049] Step 1: Dissolve inorganic silicate in water, mix and stir for 12 minutes, and adjust the pH to 8; then add octadecyltrimethylammonium chloride, heat to 80℃, react for 1.5 hours, then filter, take the filtrate, add BiM polyhollow silica material, dry, grind into powder to obtain antifungal agent.

[0050] Step 2: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0051] Step 3: Add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 4 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-fouling flashover coating.

[0052] Example 5

[0053] The alcohol-based anti-mildew and anti-flashover coating provided in this embodiment comprises the following components by weight:

[0054]

[0055] The antifungal agent includes BiM hollow silica, octadecyltrimethylammonium chloride and inorganic silicate in a mass ratio of 6~10:1.5~3.5:1~2.

[0056] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0057] Step 1: Dissolve inorganic silicate in water, mix and stir for 12 minutes, and adjust the pH to 5; then add octadecyltrimethylammonium chloride, heat to 70℃, react for 2 hours, then filter, take the filtrate, add BiM polyhollow silica material, dry, grind into powder to obtain antifungal agent.

[0058] Step 2: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0059] Step 3: Add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 4 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-fouling flashover coating.

[0060] Comparative Example 1

[0061] The alcohol-free anti-flashover coating provided in this comparative example comprises the following components by weight:

[0062]

[0063] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0064] Step 1: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0065] Step two, add crosslinking agent, curing accelerator and catalyst to the mixed solution in sequence, stir for 3 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized anti-mildew and anti-fouling flashover coating.

[0066] Comparative Example 2

[0067] The alcohol-free anti-flashover coating provided in this comparative example comprises the following components by weight:

[0068]

[0069] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0070] Step 1: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0071] Step two, add crosslinking agent, curing accelerator and catalyst to the mixed solution in sequence, stir for 3 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized anti-mildew and anti-fouling flashover coating.

[0072] Comparative Example 3

[0073] The alcohol-free anti-mildew and anti-fouling flashover coating provided in this comparative example comprises the following components by weight:

[0074]

[0075] The preparation of the above-mentioned alcohol-de-alcohol type anti-mildew type anti-flashover coating includes the following steps:

[0076] Step 1: Take alkoxy silicone oil, add inorganic filler to it, and then stir. After stirring evenly, add structure control agent and coupling agent to obtain a mixed solution.

[0077] Step two, add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 3 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-fouling flashover coating.

[0078] Table 1. Experimental data of the examples and comparative examples.

[0079]

[0080] Compared with comparative examples 1 to 5, the present invention significantly improves the anti-mold effect of the coating by setting the anti-mold agent components. Furthermore, compared with comparative example 3, the anti-mold agent of the present invention, using a mixture of three components, is more effective than a single anti-mold agent. The de-alcoholized anti-mold and anti-flashover coating of the present invention has high mechanical properties, reaching above 3 MPa, and superior electrical properties, with a dielectric strength exceeding 18 KV / mm. It also meets the requirements for spray application and fulfills the comprehensive performance requirements for anti-flashover coatings.

[0081] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A de-alcoholized, mildew-resistant, and anti-flashover coating, characterized in that: By weight, it comprises 80-100 parts alkoxy silicone oil, 40-75 parts inorganic filler, 3-7 parts crosslinking agent, 0.2-0.5 parts catalyst, 1-3 parts curing accelerator, 0.5-3 parts coupling agent, 10-100 parts structure control agent, and 0.5-3 parts mildew inhibitor. The mildew inhibitor comprises BiM polyhollow silica, octadecyltrimethylammonium chloride, and inorganic silicate in a mass ratio of 6-10:1.5-3.5:1-2. The preparation method of the de-alcoholized anti-mildew and anti-flashover coating includes the following steps: Inorganic silicate is dissolved in water and stirred for 8-12 minutes to adjust the pH to 5-8. Then, octadecyltrimethylammonium chloride is added, the temperature is raised to 50-80℃, and the reaction is carried out for 1.5-2.5 hours. After filtration, BiM hollow silica material is added to the filtrate, dried, and ground into powder to obtain the antifungal agent. Take alkoxy silicone oil, add inorganic filler to it, stir, and after stirring evenly, add structure control agent and coupling agent to obtain a mixed solution; Then, add crosslinking agent, curing accelerator, mildew inhibitor and catalyst to the mixed solution in sequence, stir for 3-5 minutes to obtain composite adhesive, and finally filter to obtain de-alcoholized mildew and anti-flashover coating.

2. The de-alcoholized anti-mildew and anti-flashover coating according to claim 1, characterized in that: The alkoxy silicone oil includes one or more of the following: hydrogen-terminated polysiloxane, methoxyvinyl polysiloxane, methoxyfluorinated polysiloxane, and methoxydimethylsiloxane.

3. The de-alcoholized anti-mildew and anti-flashover coating according to claim 1, characterized in that: The inorganic filler includes one or more of the following: nano-titanium dioxide, aluminum hydroxide, iron hydroxide, silica, silicon carbide, alumina, aluminum nitride, calcined gypsum, boron nitride, silicon carbide, clay, silica powder, asbestos wool, and calcium carbonate.

4. The de-alcoholized anti-mildew and anti-flashover coating according to claim 1, characterized in that: The catalyst includes one or more of platinum catalyst, tetrabutyl titanate, ethyl acetoacetate, and tetramethylammonium hydroxide.

5. The de-alcoholized anti-mildew and anti-flashover coating according to claim 1, characterized in that: The crosslinking agent includes one or more of methyltrimethoxysilane, vinyltrimethoxysilane, hydroxyl-terminated hyperbranched polysiloxane, methyl orthosilicate, phenyltrimethoxysilane, aniline methyltrimethoxysilane, diethylamine methyltrimethoxysilane, and propyltrimethoxysilane.

6. The de-alcoholized anti-mildew and anti-flashover coating according to claim 1, characterized in that: The coupling agent includes one or more of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

7. The de-alcoholized anti-mildew and anti-flashover coating according to claim 1, characterized in that: The structure control agent includes one or more of vinyl silicone oil, hydroxy silicone oil, diphenylsilanediol, hexamethyldisilazane, and cyclic trisilane.

8. The de-alcoholized anti-mildew and anti-flashover coating according to claim 1, characterized in that: The curing accelerator includes one or more of dihexylamine, N-methylimidazole, and dimethyl sulfoxide.

9. The application of the de-alcoholized anti-mildew and anti-flashover coating according to any one of claims 1 to 8 in power equipment.

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