Corrosion-resistant and flame-retardant material for electrical equipment as well as preparation method and application thereof

Abstract

The invention discloses an anticorrosive flame-retardant material for electrical equipment as well as a preparation method and application of the anticorrosive flame-retardant material. The anticorrosive flame-retardant material comprises the following components in parts by mass: 100 parts of blended resin, 20-40 parts of pigment filler, 30-60 parts of a flame retardant, 50-90 parts of a solvent, 0.1-3 parts of a defoaming agent, 0.1-3 parts of a flatting agent and 0.1-3 parts of a dispersing agent, the blend resin is prepared by carrying out polymerization reaction on bisphenol A type epoxy resin, bisphenol F type epoxy resin and a curing agent. Two resins are blended and modified to form an interpenetrating polymer network (IPN) structure, the apparent viscosity of the resins is improved, so that the material has better corrosion resistance, the stability of the material is further improved by adding the combination of the flame retardant, the defoaming agent, the flatting agent and the dispersing agent in specific parts, and the material has good corrosion resistance and also has good weather resistance. The material also has excellent fireproof and flame-retardant capabilities, and finally the anticorrosive and flame-retardant material for the electrical equipment, which has excellent corrosion resistance and fireproof and flame-retardant properties, is obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-corrosion and flame-retardant materials, and specifically relates to an anti-corrosion and flame-retardant material for electric power equipment, and also relates to a preparation method and application of the anti-corrosion and flame-retardant material for electric power equipment. Background Art

[0002] In the power system, there are usually many devices arranged in the same room, and there is often a risk of short circuit and fire. The safety protection of power equipment can be divided into anti-corrosion protection and fire protection. Anti-corrosion protection is mainly related to the project site environment. Coastal areas or offshore islands are typical. The air contains a large amount of salt spray, and the anti-corrosion of power equipment faces severe challenges. Fire protection is mainly related to the operating environment of the equipment. When a fire occurs in a building, the surface protective layer of the existing power equipment has basically no flame retardant, fireproof and heat insulation effect. For this reason, an anti-corrosion and flame retardant material for power equipment is needed, which can effectively protect power equipment and improve power supply reliability.

[0003] Chinese invention patent CN201910721572.1 discloses a water-based nano-silicon-acrylic metal anticorrosion coating and its preparation method, which uses aminopropyltrimethoxysilane to modify the surface hydroxyl-rich silica nanoparticles. The obtained coating not only has better anticorrosion performance, but also has better effects in hardness and solvent resistance, but the acid and alkali resistance can only reach 24h, and the salt spray resistance can reach 500h, and the anticorrosion effect is insufficient; Chinese invention patent CN201510869748.X discloses a water-based PVDF fluorocarbon metal baking paint for drilling single board, which is applied to aluminum plate, has good weather resistance and antirust performance, good adhesion, but the cost of fluorocarbon metal baking paint is high, and the daily construction is difficult, and the environmental protection of fluorocarbon raw materials is not good. And none of the above materials have flame retardant function. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-corrosion and flame-retardant material for electric equipment and a preparation method and application thereof, so as to combine anti-corrosion protection and fire protection for electric equipment and improve the service life and performance of the electric equipment.

[0005] The technical solution adopted by the present invention is an anti-corrosion and flame-retardant material for electric power equipment, comprising the following components in parts by mass: 100 parts of blended resin, 20-40 parts of pigments and fillers, 30-60 parts of flame retardants, 50-90 parts of solvents, 0.1-3 parts of defoaming agents, 0.1-3 parts of leveling agents, and 0.1-3 parts of dispersants.

[0006] Furthermore, the above-mentioned blended resin is prepared by polymerization reaction of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent, the mass ratio of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent is 5:5:1-4, and the curing agent is a combination of one or more of Mannich base, phenolaldehyde amine and phenolamide.

[0007] Furthermore, the flame retardant is a combination of one or more of ammonium phosphate, ammonium polyphosphate, triphenyl phosphate, tricresyl phosphate, and triethyl phosphate.

[0008] Furthermore, the pigment filler is a combination of one or more of green silicon carbide, alumina, quartz powder, titanium dioxide, talcum powder, wet silk masterbatch powder, and carbon black powder.

[0009] Furthermore, the above-mentioned solvent is a combination of one or more of toluene, xylene, mesitylene, ethanol, propanol, n-butanol, ethyl acetate, and butyl acetate.

[0010] Furthermore, the defoaming agent is one or two of polydimethylsiloxane and polyoxypropylene polyoxyethylene glycerol ether.

[0011] Furthermore, the leveling agent is one or more of polyacrylic acid, silicone, and fluorocarbon.

[0012] Furthermore, the above dispersant is one or more combinations of fatty acid salts, sulfonate glycols, fatty alcohol polyoxyethylene ethers, quaternary ammonium salts, and polyacrylates.

[0013] A method for preparing an anticorrosion and flame retardant material for electric power equipment comprises the following steps:

[0014] Step 1: put bisphenol A epoxy resin and bisphenol F epoxy resin into a stirring container and stir them evenly, slowly add curing agent, stir at 50° C. for 30 minutes, heat to 75° C. and continue to react for 30 minutes to obtain a blended resin; the mass ratio of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent is 5:5:1-4;

[0015] Step 2: Put 30% of the solvent into a stirring container, gradually add pigments, fillers and flame retardants, and use a high-speed disperser or grinder to fully disperse until the pigments, fillers and flame retardants are evenly dispersed without obvious agglomerated particles;

[0016] Step 3: In another container, mix the blended resin with 70% solvent and stir evenly to fully dissolve the resin;

[0017] Step 4: slowly add the dispersed mixture of pigments, fillers and flame retardants into the resin solution while continuously stirring, add dispersant, leveling agent and defoaming agent in sequence, stir evenly, and the anti-corrosion and flame retardant material for power equipment is obtained.

[0018] An application of an anti-corrosion and flame-retardant material for electric power equipment is applied to a metal substrate by brushing, first curing at room temperature for 4 days, and then heating to 50°C for curing for 2 days.

[0019] Compared with the prior art, the beneficial effect of the present invention is that the present invention provides a preparation raw material for an anti-corrosion and flame-retardant material for electric power equipment, which includes a base resin, a pigment filler, a curing agent, a flame retardant, a solvent, a defoamer, a leveling agent, and a dispersant in specific fractions; the bisphenol A resin has good flexibility after curing, and the bisphenol F resin has a high cross-linking density after curing, and the two resins are blended and modified to form an interpenetrating network polymer (IPN) structure to obtain a blended resin with both permeability resistance, flexibility and adhesion, and the apparent viscosity of the resin is further improved, so that the material has better corrosion resistance, and a combination of a specific number of flame retardants, defoamers, leveling agents, and dispersants is added to further improve the stability of the material, so that it has good corrosion resistance and excellent fire retardant ability, and finally an anti-corrosion and flame retardant material for electric power equipment with excellent corrosion resistance and fire retardant properties is obtained. DETAILED DESCRIPTION

[0020] The present invention will be further explained below in conjunction with the description to facilitate better understanding by those skilled in the art.

[0021] Example

[0022] An anticorrosion and flame retardant material for electric power equipment, the raw materials for preparation are calculated by weight, see Table 1, Table 1 (the embodiments need to include the raw material components as end values)

[0023] Components Example 1 Example 2 Example 3 Blending resin 100 100 100 Solvent 50 70 90 Flame retardants 30 45 60 Filling paint 20 30 40 Defoaming agent 0.1 1.5 3 Leveling agent 0.1 1.5 3 Dispersants 0.1 1.5 3

[0024] in,

[0025] The blended resin is prepared by polymerization reaction of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent, the mass ratio of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent is 5:5:1-4, and the curing agent is a combination of one or more of Mannich base, phenolaldehyde amine and phenolaldehyde amide.

[0026] The flame retardant is a combination of one or more of ammonium phosphate, ammonium polyphosphate, triphenyl phosphate, tricresyl phosphate and triethyl phosphate.

[0027] The pigment and filler is a combination of one or more of green silicon carbide, alumina, quartz powder, titanium dioxide, talcum powder, wet silk masterbatch powder and carbon black powder.

[0028] The solvent is a combination of one or more of toluene, xylene, mesitylene, ethanol, propanol, n-butanol, ethyl acetate and butyl acetate.

[0029] The defoaming agent is one or two of polydimethylsiloxane and polyoxypropylene polyoxyethylene glycerol ether.

[0030] The leveling agent is one or more of polyacrylic acid, silicone, and fluorocarbon.

[0031] The dispersant is one or more combinations of fatty acid salts, sulfonate glycols, fatty alcohol polyoxyethylene ethers, quaternary ammonium salts, and polyacrylates.

[0032] A method for preparing an anticorrosion and flame retardant material for electric power equipment comprises the following steps:

[0033] Step 1: put bisphenol A epoxy resin and bisphenol F epoxy resin into a stirring container and stir them evenly, slowly add curing agent, stir at 50° C. for 30 minutes, heat to 75° C. and continue to react for 30 minutes to obtain a blended resin; the mass ratio of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent is 5:5:1-4;

[0034] Step 2: Put 30% of the solvent into a stirring container, gradually add pigments, fillers and flame retardants, and use a high-speed disperser or grinder to fully disperse until the pigments, fillers and flame retardants are evenly dispersed without obvious agglomerated particles;

[0035] Step 3: In another container, mix the blended resin with 70% solvent and stir evenly to fully dissolve the resin;

[0036] Step 4: slowly add the dispersed mixture of pigments, fillers and flame retardants into the resin solution while continuously stirring, add dispersant, leveling agent and defoaming agent in sequence, stir evenly, and the anti-corrosion and flame retardant material for power equipment is obtained.

[0037] An application of an anti-corrosion and flame-retardant material for electric power equipment is applied to a metal substrate by brushing, first curing at room temperature for 4 days, and then heating to 50°C for curing for 2 days.

[0038] Comparative Example 1

[0039] An anticorrosive flame retardant material, the raw materials for preparation are calculated by weight as shown in Table 2.

[0040] Table 2

[0041] Components Comparative Example 1 Blending resin 100 Solvent 90 Flame retardants 80 Filling paint 40 Defoaming agent 3 Leveling agent 3 Dispersants 3

[0042] A method for preparing an anticorrosion and flame retardant material for electric power equipment comprises the following steps:

[0043] Step 1: put bisphenol A epoxy resin and bisphenol F epoxy resin into a stirring container and stir them evenly, slowly add curing agent, stir at 50° C. for 30 minutes, heat to 75° C. and continue to react for 30 minutes to obtain a blended resin; the mass ratio of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent is 5:5:1-4;

[0044] Step 2: Put 30% of the solvent into a stirring container, gradually add pigments, fillers and flame retardants, and use a high-speed disperser or grinder to fully disperse until the pigments, fillers and flame retardants are evenly dispersed without obvious agglomerated particles;

[0045] Step 3: In another container, mix the blended resin with 70% solvent and stir evenly to fully dissolve the resin;

[0046] Step 4: slowly add the dispersed mixture of pigments, fillers and flame retardants into the resin solution while continuously stirring, add dispersant, leveling agent and defoaming agent in sequence, stir evenly, and the anti-corrosion and flame retardant material for power equipment is obtained.

[0047] An application of an anti-corrosion and flame-retardant material for electric power equipment is applied to a metal substrate by brushing, first curing at room temperature for 4 days, and then heating to 50°C for curing for 2 days.

[0048] Anticorrosive and flame retardant materials, preparation raw materials by weight, see Table 3,

[0049] Table 3

[0050] Components Comparative Example 2 Phosphorus-containing phenolic resin 20 Fluorosilicone polymer three-proof additives 1 Epoxy resin 15 Polyphthalamide resin 8 Methyl acetate 5 Nano Silica 6 Nano-TiO2 1 Nano zinc oxide 8 Silane coupling agent 2 Solvent 15

[0051] A method for preparing an anticorrosive flame retardant material comprises the following steps:

[0052] (1) mixing nano silicon dioxide, nano titanium dioxide, nano zinc oxide, and a silane coupling agent to obtain component A;

[0053] (2) adding phosphorus-containing phenolphthalein resin, fluorosilicone polymer anti-corrosion agent, epoxy resin, polyphthalamide resin and polymethyl acrylate to the solvent and mixing evenly to obtain component B;

[0054] (3) Finally, components A and B are mixed and stirred for 1 hour to obtain the product.

[0055] Special anti-corrosion flame retardant paint for power equipment, preparation raw materials by weight, see Table 4, Table 4

[0056]

[0057]

[0058] Preparation method of special anti-corrosion flame retardant paint for power equipment:

[0059] (1) adding ODDP flame retardant resin and 60% of the total weight of solvent, 60% of the total weight of dispersant, 60% of the total weight of wetting agent and 60% of the total weight of defoamer into a paint mixing tank at 30° C., starting stirring, stirring and mixing to obtain a first mixed material at a stirring speed of 1200 rpm until a vortex appears at the center of the liquid surface;

[0060] (2) adding the remaining dispersant, the remaining wetting agent, the remaining defoamer and the anti-settling agent to the paint mixing tank of step (1); then adding the flame retardant, the carbonizing agent and the foaming agent to the paint mixing tank, and dispersing the materials at a stirring speed of 2000 rpm for 20 minutes to fully mix the materials; then adding the pigments and fillers to the paint mixing tank, and dispersing them at a stirring speed of 2000 rpm for 150 minutes to obtain a second mixed material;

[0061] (3) refining the second mixed material to obtain a third mixed material. Specifically, grinding the second mixed material with a sand mill to a fineness of less than 50 μm for later use;

[0062] (4) Add the remaining raw materials to the third mixed material at 30° C., stir and disperse, the stirring speed is 1400 rpm, and the stirring time is 20 min, to obtain the special anti-corrosion flame retardant paint for power equipment.

[0063] Performance Testing

[0064] Before applying anti-corrosion paint to steel, the following steps should be performed:

[0065] ①Surface cleaning:

[0066] Removing Grease and Dirt: Using a suitable solvent such as gasoline, kerosene or a special degreaser, wipe the steel surface to remove grease and dirt.

[0067] Remove dust and debris: Use compressed air to blow away or use a brush to remove dust, grit and other debris from the surface.

[0068] ②Rust removal treatment:

[0069] Manual rust removal: For smaller areas or mild rust, you can use tools such as wire brushes and sandpaper to manually polish and remove rust.

[0070] Mechanical rust removal: For large areas or severe rust, mechanical methods such as sand blasting and shot blasting can be used to remove the rust layer.

[0071] Chemical rust removal: Use chemical methods such as pickling to remove rust, but pay attention to neutralization and cleaning after treatment.

[0072] ③Surface roughness treatment:

[0073] In order to enhance the adhesion of anti-corrosion paint, the steel surface can be given a certain degree of roughness by sandblasting or grinding after rust removal.

[0074] ④ Drying treatment:

[0075] Make sure the surface is dry, either let it dry naturally or use a drying device to speed up the drying process.

[0076] ⑤Inspection and evaluation:

[0077] Carefully inspect the treated surface to ensure there is no residual rust, oil, moisture, etc.

[0078] Evaluate whether the surface roughness meets the requirements of anti-corrosion paint.

[0079] ⑥Shielding protection:

[0080] For areas that do not require anti-corrosion paint, such as connectors, signs, etc., use masking materials for protection.

[0081] The steel was treated by the above ① to ⑥ and then put into use. The anticorrosion and flame retardant materials for electric power equipment in Examples 1 to 3 were applied to the prepared steel, first cured at room temperature for 4 days, then heated to 50° C. for 2 days and then tested.

[0082] Table 5 Main properties of anticorrosion and flame retardant coatings for power equipment

[0083] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Room temperature drying time / h (surface drying) 3.8 4.3 4.8 4.8 4.7 4.1 Adhesion / Grade 1 1 1 1 1 1 Flexibility / mm 1 1 1 1 1 1 Flame retardant time / min 121 129 123 119 116 120 5% hydrochloric acid 500h No change No change No change No change No change No change 5% NaCl solution 2000h No change No change No change No change No change No change UV aging resistance 2000h No change No change No change No change No change No change

[0084] It can be seen from the above table that the anti-corrosion flame retardant coating provided by the present application has a flame retardant time of more than 2 hours, and while having excellent flame retardant properties, it can still show excellent corrosion resistance in acid and salt spray. Among them, the anti-corrosion flame retardant coating provided in Comparative Example 1 has the same ingredients as this product, and the amount of flame retardant and pigment filler is increased, but the flame retardant performance is not superior, and its corrosion resistance in acid and salt spray is reduced.

[0085] The above-described embodiments are only for describing the preferred implementation of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit and principles of the present invention, various modifications and improvements made by those skilled in the art to the technical solution of the present invention should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. An anticorrosion and flame retardant material for electric power equipment, characterized in that: The invention comprises the following components in parts by weight: 100 parts of blended resin, 20-40 parts of pigment and filler, 30-60 parts of flame retardant, 50-90 parts of solvent, 0.1-3 parts of defoamer, 0.1-3 parts of leveling agent and 0.1-3 parts of dispersant.

2. The anticorrosion and flame retardant material for electric power equipment according to claim 1, characterized in that: The blended resin is prepared by polymerization reaction of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent, the mass ratio of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent is 5:5:1-4, and the curing agent is a combination of one or more of Mannich base, phenolaldehyde amine and phenolaldehyde amide.

3. The anticorrosion and flame retardant material for electric power equipment according to claim 1, characterized in that: The flame retardant is a combination of one or more of ammonium phosphate, ammonium polyphosphate, triphenyl phosphate, tricresyl phosphate and triethyl phosphate.

4. The anticorrosion and flame retardant material for electric power equipment according to claim 1, characterized in that: The pigment filler is a combination of one or more of green silicon carbide, alumina, quartz powder, titanium dioxide, talcum powder, wet silk masterbatch powder and carbon black powder.

5. The anticorrosion and flame retardant material for electric power equipment according to claim 1, characterized in that: The solvent is a combination of one or more of toluene, xylene, mesitylene, ethanol, propanol, n-butanol, ethyl acetate, and butyl acetate.

6. The anticorrosion and flame retardant material for electric power equipment according to claim 1, characterized in that: The defoaming agent is one or two of polydimethylsiloxane and polyoxypropylene polyoxyethylene glycerol ether.

7. The anticorrosion and flame retardant material for electric power equipment according to claim 1, characterized in that: The leveling agent is one or more of polyacrylic acid, silicone, and fluorocarbon.

8. The anticorrosion and flame retardant material for electric power equipment according to claim 1, characterized in that: The dispersant is one or more combinations of fatty acid salts, sulfonate glycols, fatty alcohol polyoxyethylene ethers, quaternary ammonium salts, and polyacrylates.

9. A method for preparing an anticorrosion and flame retardant material for electric power equipment according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: put bisphenol A epoxy resin and bisphenol F epoxy resin into a stirring container and stir them evenly, slowly add curing agent, stir at 50° C. for 30 minutes, heat to 75° C. and continue to react for 30 minutes to obtain a blended resin; the mass ratio of bisphenol A epoxy resin, bisphenol F epoxy resin and curing agent is 5:5:1-4; Step 2: Put 30% solvent into a stirring container, gradually add pigments, fillers and flame retardants, and use a high-speed disperser or grinder to fully disperse until the pigments, fillers and flame retardants are evenly dispersed without obvious agglomerated particles; Step 3: In another container, mix the blended resin with 70% solvent and stir evenly to fully dissolve the resin; Step 4: slowly add the dispersed mixture of pigments, fillers and flame retardants into the resin solution while continuously stirring, add dispersant, leveling agent and defoaming agent in sequence, stir evenly, and the anti-corrosion and flame retardant material for power equipment is obtained.

10. The use of an anticorrosion and flame retardant material for electric power equipment according to any one of claims 1 to 8, characterized in that: Applied to metal substrates, the application method is brushing, first cured at room temperature for 4 days, then heated to 50℃ for 2 days.

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