Insulating flame-retardant coating for three-electric product and groove matching treatment process of insulating flame-retardant coating

Abstract

The invention discloses an insulating flame-retardant coating for three-electric products, which is characterized by comprising an agent A and an agent B. The agent A is prepared by mixing and stirring the following components in percentage by weight at normal temperature for 20-40 minutes: 6-10% of hexafluorozirconic acid, 0.3-1% of aluminum nitrate, 4-6% of nitric acid and the balance of water; and the agent B is prepared by mixing and stirring the following components in percentage by weight at normal temperature for 20-40 minutes: 1-3% of cationic resin, 3-5% of sodium nitrate, 4-6% of manganous nitrate and the balance of water. The insulating flame-retardant coating does not contain heavy metal, phosphorus, nickel and other harmful substances and meets the requirement for environmental protection, and in addition, a coating film formed after treatment meets the characteristics of insulation, flame retardance and corrosion resistance of three-electric products.

Description

Technical Field

[0001] The invention belongs to the field of chemical industry, and in particular relates to an insulating flame-retardant coating for three-electric products and a groove treatment process thereof. Background Art

[0002] The three-electric system refers to the battery, motor and electronic control system in new energy vehicles. Currently, the surface treatment of the three-electric products contains resin. After the resin is cross-linked with the coating, a dense network structure is formed to achieve excellent corrosion resistance.

[0003] Due to the particularity of three-electric products, the surface coating of three-electric products is required to have insulating and flame-retardant properties. However, the existing insulating flame-retardant coatings of three-electric products have the following defects: (1) Contain heavy metals, which do not meet the requirements of environmental protection; (2) Contain elements such as phosphorus and nickel. Phosphorus-containing wastewater will pollute water bodies, stimulate the proliferation of algae and aquatic plants, lead to eutrophication of water bodies, and then cause sudden outbreaks of algae and large-scale death of aquatic plants, causing serious pollution of water bodies. Nickel-containing wastewater will pollute the environment and have adverse effects on the growth and reproduction of aquatic organisms. In severe cases, it may even cause death and endanger human health.

[0004] Patent publication number CN116948494A proposes an insulating, flame-retardant, and corrosion-resistant powder coating for batteries. The powder coating comprises, by weight, 30-50 parts of bisphenol A epoxy resin, 10-30 parts of phenolic-modified epoxy resin, 10-30 parts of a curing agent, 0.3-0.7 parts of a curing accelerator, 0.3-0.7 parts of a brightener, 0.5-1.5 parts of a leveling agent, 0.2-1 parts of a defoamer, 5-15 parts of a flame retardant, 0.1-1 parts of benzoin, and 1-10 parts of an insulating filler. While this powder coating meets the requirements for insulation, flame retardancy, and corrosion resistance, it is expensive and has low processing efficiency. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an insulating flame-retardant coating and a groove treatment process for three-electric products. The product does not contain harmful substances such as heavy metals and phosphorus, meets environmental protection requirements, and the coating film formed after treatment meets the characteristics of insulation, flame retardancy and corrosion resistance.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An insulating flame-retardant coating for three-electric products comprises an agent A and an agent B. The agent A is prepared by mixing and stirring the following components at room temperature for 20-40 minutes according to weight percentage: 6-10% fluorozirconic acid, 0.3-1% aluminum nitrate, 4-6% nitric acid, and the balance water; and the agent B is prepared by mixing and stirring the following components at room temperature for 20-40 minutes according to weight percentage: 1-3% cationic resin, 3-5% sodium nitrate, 4-6% manganese nitrate, and the balance water.

[0008] Preferably, the agent A is prepared by mixing 8% fluorozirconic acid, 0.5% aluminum nitrate, 5% nitric acid, and the balance water at room temperature and stirring for 30 minutes.

[0009] Preferably, the agent B is prepared by mixing 2% cationic resin, 4% sodium nitrate, 5% manganese nitrate and the balance water at room temperature for 30 minutes.

[0010] The above coatings are prepared in a tank according to the weight percentage of 2% of agent A and 1% of agent B. The preparation process is as follows:

[0011] S1: Add 80% pure water into the container;

[0012] S2: Add 2% of agent A, stir for 10 minutes, then add 1% of agent B, stir for 10 minutes;

[0013] S3: replenish the remaining pure water;

[0014] S4: Adjust the pH to 4.5 with a pH adjuster;

[0015] S5: Treat the workpiece at a temperature of 30°C for 3 minutes.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention provides an insulating flame retardant coating with the following beneficial effects:

[0018] 1. The insulating flame retardant coating does not contain heavy metals, phosphorus, nickel and other harmful substances, and meets the requirements of environmental protection.

[0019] 2. The coating formed after treatment meets the insulation, flame retardancy, and corrosion resistance characteristics of three-electric products.

[0020] 3. The existing coating treatment process of three-electric products is pre-degreasing → degreasing → water washing → pure water washing → chemical formation → pure water washing → electrophoresis → powder spraying. The treatment process of the present invention is simpler, improves the coating treatment efficiency, and saves costs. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] An insulating flame-retardant coating for three-electric products comprises an agent A and an agent B. The agent A is prepared by mixing and stirring the following components at room temperature for 20-40 minutes according to weight percentage: 6-10% fluorozirconic acid, 0.3-1% aluminum nitrate, 4-6% nitric acid, and the balance water; and the agent B is prepared by mixing and stirring the following components at room temperature for 20-40 minutes according to weight percentage: 1-3% cationic resin, 3-5% sodium nitrate, 4-6% manganese nitrate, and the balance water.

[0023] In the above-mentioned agent B, cationic resin refers to the resin whose exchanged ions are cationic resins in the ion exchange separation method. Cationic resins are divided into strong acid cationic resins and weak acid cationic resins. Strong acid cationic resins contain a large number of strong acidic groups, such as sulfonic acid group -SO3H, which can easily dissociate H+ in the solution, so they are strongly acidic; weak acidic cationic resins contain weak acidic groups, such as carboxyl group -COOH, which can dissociate H+ in water and are acidic.

[0024] The above coatings are prepared in a tank according to the weight percentage of 2% of agent A and 1% of agent B. The preparation process is as follows:

[0025] S1: Add 80% pure water into the container;

[0026] S2: Add 2% of agent A, stir for 10 minutes, then add 1% of agent B, stir for 10 minutes;

[0027] S3: replenish the remaining pure water;

[0028] S4: Adjust the pH to 4.5 using a pH adjuster (e.g., NaOH, NaHCO3, etc.);

[0029] S5: Treat the workpiece at a temperature of 30°C for 3 minutes.

[0030] Compared with the existing technology, the insulating flame-retardant coating of the present invention has a simple formula and process, which saves costs and improves processing efficiency. In addition, the formula of the present invention does not contain harmful substances such as heavy metals, phosphorus, nickel, etc., meets environmental protection requirements, and has better corrosion resistance and insulation than existing similar products.

[0031] Example

[0032] An insulating flame-retardant coating for three-electric products comprises an agent A and an agent B. The agent A is prepared by mixing 8% of fluorozirconic acid, 0.5% of aluminum nitrate, 5% of nitric acid, and the balance of water at room temperature and stirring for 30 minutes; the agent B is prepared by mixing 2% of cationic resin, 4% of sodium nitrate, 5% of manganese nitrate, and the balance of water at room temperature and stirring for 30 minutes.

[0033] Comparative Example

[0034] An insulating flame-retardant coating for three-electric products comprises an agent A and an agent B. The agent A is prepared by mixing 8% of fluorozirconic acid, 0.5% of aluminum nitrate, 5% of nitric acid, and the balance of water at room temperature and stirring for 30 minutes; the agent B is prepared by mixing 2% of aminopropyl-3-methoxysilane, 4% of sodium nitrate, 5% of manganese nitrate, and the balance of water at room temperature and stirring for 30 minutes.

[0035] The above coatings are prepared in a tank according to the weight percentage of 2% of agent A and 1% of agent B. The preparation process is as follows:

[0036] S1: Add 80% pure water into the container;

[0037] S2: Add 2% of agent A, stir for 10 minutes, then add 1% of agent B, stir for 10 minutes;

[0038] S3: replenish the remaining pure water;

[0039] S4: Adjust the pH to 4.5 with a pH adjuster;

[0040] S5: Treat the workpiece at a temperature of 30°C for 3 minutes.

[0041] The coatings of the embodiment and the comparative example were used to treat the workpieces according to the same tank preparation process as above, and the data results were as follows:

[0042]

[0043] It is not difficult to see from the above table that the data parameters of the workpiece coating obtained by using the formula and process of the present invention are basically the same as those of the existing formula and process, but the corrosion resistance and insulation resistance values ​​of the coating obtained by using the formula and process of the present invention are better than those of the coating obtained by using the existing formula and process.

[0044] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An insulating flame retardant coating for three-electric products, characterized in that: The invention comprises an agent A and an agent B. The agent A is prepared by mixing and stirring the following components at room temperature for 20-40 minutes according to weight percentage: 6-10% fluorozirconic acid, 0.3-1% aluminum nitrate, 4-6% nitric acid, and the balance water; and the agent B is prepared by mixing and stirring the following components at room temperature for 20-40 minutes according to weight percentage: 1-3% cationic resin, 3-5% sodium nitrate, 4-6% manganese nitrate, and the balance water.

2. The insulating flame retardant coating for three-electric products according to claim 1, characterized in that: The agent A is prepared by mixing 8% of fluorozirconic acid, 0.5% of aluminum nitrate, 5% of nitric acid and the balance of water at room temperature for 30 minutes.

3. The insulating flame retardant coating for three-electric products according to claim 1, characterized in that: The agent B is prepared by mixing 2% of cationic resin, 4% of sodium nitrate, 5% of manganese nitrate and the balance of water at room temperature for 30 minutes.

4. A process for preparing a groove for insulating flame retardant coatings for three-electric products, characterized in that: The tank is prepared according to the weight percentage of 2% of agent A and 1% of agent B. The processing process of the tank is as follows: S1: Add 80% pure water into the container; S2: Add 2% of agent A, stir for 10 minutes, then add 1% of agent B, stir for 10 minutes; S3: replenish the remaining pure water; S4: Adjust the pH to 4.5 with a pH adjuster; S5: Treat the workpiece at a temperature of 30°C for 3 minutes.

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