High-temperature-resistant electromagnetic wire self-adhesive paint and preparation method thereof

Abstract

The invention is suitable for the technical field of electromagnetic wire self-adhesive paint, and provides high-temperature-resistant electromagnetic wire self-adhesive paint and a preparation method thereof. The high-temperature-resistant electromagnetic wire self-adhesive paint is prepared from the following components in parts by weight: 40 to 60 parts of epoxy resin, 3 to 6 parts of plant fiber, 1.5 to 2.5 parts of carbon black, 0.9 to 1.6 parts of diatomite, 4.5 to 9.5 parts of zinc phthalocyanine conjugated microporous polymer, 0.6 to 1.2 parts of curing agent, 24 to 32 parts of solvent, 0.3 to 0.7 part of surfactant, 2.3 to 5.5 parts of nano metal oxide and 3 to 6 parts of adhesive. Preferably, the plant fiber is one or more of bamboo fiber, coconut fiber and jute fiber; the solvent is a mixed solution of ethanol, isopropanol and acetone, and the mixing ratio of the ethanol to the isopropanol to the acetone is (9-12): (1-2): (4-5). The prepared electromagnetic wire self-adhesive paint has the advantages of excellent high temperature resistance, strong adhesion, excellent electrical insulation performance and high mechanical strength, and the heat resistance and chemical stability of the paint film are effectively improved through the mutual synergistic effect of the components.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic wire self-adhesive paint, in particular to a high temperature resistant electromagnetic wire self-adhesive paint and a preparation method thereof. Background Art

[0002] Electromagnetic wire (also known as enameled wire) is a type of wire used in electrical equipment, usually made of copper or aluminum conductors and coated with a layer of insulating varnish. It plays a key role in various electrical equipment, especially in motors, transformers, generators, household appliances and other equipment, mainly used to transmit electrical energy, generate magnetic fields and transmit electrical signals. Electromagnetic wire self-adhesive varnish (also known as electromagnetic wire paint) is a special coating that is usually applied to the surface of electromagnetic wire (such as motor windings, transformer windings, etc.). Its main function is to provide electrical insulation, enhance mechanical strength and heat resistance. It also has self-adhesive properties and can directly adhere to and form a protective layer when the electromagnetic wire is wound to avoid wear and short circuit of the wire.

[0003] The main functions and characteristics of electromagnetic wire self-adhesive paint include: ① Electrical insulation: It has high electrical insulation performance, which can effectively isolate the current and prevent short circuit or leakage between electromagnetic wires; ② Heat resistance: It can withstand high temperature environment and ensure the stability and long-term service life of the electromagnetic wire at high temperature; ③ Self-adhesion: It has good adhesion. The paint layer can be firmly attached to the surface of the electromagnetic wire after coating, and it has a self-adhesive effect during the winding process, avoiding the shedding of the coating; ④ Mechanical protection: The coating can enhance the wear resistance of the electromagnetic wire and prevent damage to the wire during processing; ⑤ Chemical stability: It has strong resistance to chemical corrosion, can adapt to harsh environments, and extend the service life of the electromagnetic wire.

[0004] However, the traditional electromagnetic wire self-adhesive paint is prone to performance degradation in high temperature environments, such as insufficient heat resistance and weakened adhesion, which limits its application in high temperature electrical equipment. In order to overcome these defects, the present invention proposes a high temperature resistant electromagnetic wire self-adhesive paint and a preparation method thereof, aiming to provide an electromagnetic wire self-adhesive paint that can still maintain excellent performance in a high temperature environment. Summary of the invention

[0005] The purpose of the present invention is to provide a high-temperature resistant electromagnetic wire self-adhesive paint and a preparation method thereof, so as to solve the problem that traditional electromagnetic wire self-adhesive paint in the prior art is prone to performance degradation in high-temperature environments, such as insufficient heat resistance and weakened adhesion, which limits its application in high-temperature electrical equipment.

[0006] To achieve the above object, the present invention provides the following technical solution: In a first aspect, the present invention provides a high temperature resistant electromagnetic wire self-adhesive paint, which comprises the following components and contents by weight: 40-60 parts of epoxy resin, 3-6 parts of plant fiber, 1.5-2.5 parts of carbon black, 0.9-1.6 parts of diatomaceous earth, 4.5-9.5 parts of zinc phthalocyanine conjugated microporous polymer, 0.6-1.2 parts of curing agent, 24-32 parts of solvent, 0.3-0.7 parts of surfactant, 2.3-5.5 parts of nano metal oxide, and 3-6 parts of adhesive.

[0007] Preferably, the plant fiber is one or more of bamboo fiber, coconut shell fiber and jute fiber.

[0008] Preferably, the solvent is a mixture of ethanol, isopropanol and acetone, and the mixing ratio of ethanol, isopropanol and acetone is (9-12): (1-2): (4-5).

[0009] Preferably, the surfactant is one or more of stearamide, aminoethylammonium chloride or palmitamide.

[0010] Preferably, the nano metal oxide comprises nano zinc oxide, nano aluminum oxide and nano silicon dioxide, and the mixing ratio of the nano zinc oxide, nano aluminum oxide and nano silicon dioxide is (1-2): (2-5): (3-5).

[0011] Preferably, the adhesive is one or more of epoxy silicone resin and alcohol silicone resin.

[0012] Preferably, the curing agent is one or more of a polyamide curing agent, an aromatic amine curing agent or an aliphatic amine curing agent.

[0013] Preferably, the zinc phthalocyanine conjugated microporous polymer is formed by polycondensation of tetraaminozinc phthalocyanine and terephthalaldehyde, and the molecular formula of tetraaminozinc phthalocyanine is as follows: .

[0014] Preferably, the high temperature resistant electromagnetic wire self-adhesive paint also includes beeswax, and the mass fraction of the beeswax is 0.3-0.6 parts.

[0015] The second aspect of the present invention provides a method for preparing the high temperature resistant electromagnetic wire self-adhesive paint according to the first aspect of the present invention, comprising the following steps: S1, preparation of zinc phthalocyanine conjugated microporous polymer: Weigh tetraaminozinc phthalocyanine, mix tetraaminozinc phthalocyanine and terephthalaldehyde in a molar ratio of 1:2, add an appropriate amount of N, N-dimethylacetamide as a solvent, heat to 210°C under nitrogen protection, and react at a constant temperature for 72 hours. After the reaction is completed, rinse with acetone, then use tetrahydrofuran as an eluent for Soxhlet extraction, and dry to obtain a zinc phthalocyanine conjugated microporous polymer; S2, preparation of high temperature resistant electromagnetic wire self-adhesive paint: The zinc phthalocyanine conjugated microporous polymer is mixed with the other components in proportion, stirred at high speed for 15-30 minutes at a temperature of 40-50° C. to obtain a high-temperature resistant electromagnetic wire self-adhesive paint, which is then filled and stored.

[0016] The present invention has at least the following beneficial effects: (1) The present invention provides a high temperature resistant electromagnetic wire self-adhesive paint and a preparation method thereof, wherein the prepared electromagnetic wire self-adhesive paint has excellent high temperature resistance, strong adhesion, excellent electrical insulation performance, and high mechanical strength; (2) The present invention provides a high-temperature resistant electromagnetic wire self-adhesive paint and a preparation method thereof. Through the synergistic effect of the various components, the heat resistance and chemical stability of the paint film are effectively improved. In a high-temperature environment, the self-adhesive paint can still maintain good performance without problems such as weakened adhesion and decreased heat resistance. It has broad market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a synthetic route of the zinc phthalocyanine conjugated microporous polymer in the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] This embodiment provides a high temperature resistant electromagnetic wire self-adhesive paint, which includes the following components and contents by weight: 40 parts of epoxy resin, 3 parts of plant fiber, 1.5 parts of carbon black, 0.9 parts of diatomaceous earth, 4.5 parts of zinc phthalocyanine conjugated microporous polymer, 0.6 parts of curing agent, 24 parts of solvent, 0.3 parts of surfactant, 2.3 parts of nano metal oxide, and 3 parts of adhesive.

[0020] Among them, the plant fiber is bamboo fiber; the solvent is a mixture of ethanol, isopropanol and acetone, and the mixing ratio of ethanol, isopropanol and acetone is 9:1:4; the surfactant is stearamide.

[0021] The nano metal oxides include nano zinc oxide, nano aluminum oxide and nano silicon dioxide, and the mixing ratio of nano zinc oxide, nano aluminum oxide and nano silicon dioxide is 1:2:3.

[0022] The adhesive is epoxy silicone resin; and the curing agent is polyamide curing agent.

[0023] Among them, the zinc phthalocyanine conjugated microporous polymer is formed by the polycondensation of tetraaminozinc phthalocyanine and terephthalaldehyde, and the molecular formula of tetraaminozinc phthalocyanine is as follows: .

[0024] The preparation method of the above high temperature resistant electromagnetic wire self-adhesive paint comprises the following steps: S1, preparation of zinc phthalocyanine conjugated microporous polymer: Weigh tetraaminozinc phthalocyanine, mix tetraaminozinc phthalocyanine and terephthalaldehyde in a molar ratio of 1:2, add an appropriate amount of N, N-dimethylacetamide as a solvent, heat to 210°C under nitrogen protection, and react at a constant temperature for 72 hours. After the reaction is completed, rinse with acetone, then use tetrahydrofuran as an eluent for Soxhlet extraction, and dry to obtain a zinc phthalocyanine conjugated microporous polymer. The synthesis route is as follows: Figure 1 As shown; S2, preparation of high temperature resistant electromagnetic wire self-adhesive paint: The zinc phthalocyanine conjugated microporous polymer was mixed with the other components in proportion, stirred at high speed for 30 minutes at a temperature of 40° C. to obtain a high-temperature resistant electromagnetic wire self-adhesive paint, which was then filled and stored. Example

[0025] This embodiment provides a high temperature resistant electromagnetic wire self-adhesive paint, which includes the following components and contents by weight: 50 parts of epoxy resin, 4 parts of plant fiber, 2 parts of carbon black, 1.3 parts of diatomaceous earth, 7 parts of zinc phthalocyanine conjugated microporous polymer, 1 part of curing agent, 30 parts of solvent, 0.6 parts of surfactant, 4 parts of nano metal oxide, and 5 parts of adhesive.

[0026] Among them, the plant fiber is coconut shell fiber; the solvent is a mixture of ethanol, isopropanol and acetone, and the mixing ratio of ethanol, isopropanol and acetone is 11:1.5:4.5; the surfactant is aminoethylammonium chloride.

[0027] The nano metal oxides include nano zinc oxide, nano aluminum oxide and nano silicon dioxide, and the mixing ratio of nano zinc oxide, nano aluminum oxide and nano silicon dioxide is 1.5:4:3.5.

[0028] The adhesive is alcohol silicone resin; the curing agent is aromatic amine curing agent.

[0029] Among them, the zinc phthalocyanine conjugated microporous polymer is formed by the polycondensation of tetraaminozinc phthalocyanine and terephthalaldehyde, and the molecular formula of tetraaminozinc phthalocyanine is as follows: .

[0030] The preparation method of the above high temperature resistant electromagnetic wire self-adhesive paint comprises the following steps: S1, preparation of zinc phthalocyanine conjugated microporous polymer: Weigh tetraaminozinc phthalocyanine, mix tetraaminozinc phthalocyanine and terephthalaldehyde in a molar ratio of 1:2, add an appropriate amount of N, N-dimethylacetamide as a solvent, heat to 210°C under nitrogen protection, and react at a constant temperature for 72 hours. After the reaction is completed, rinse with acetone, then use tetrahydrofuran as an eluent for Soxhlet extraction, and dry to obtain a zinc phthalocyanine conjugated microporous polymer. The synthesis route is as follows: Figure 1 As shown; S2, preparation of high temperature resistant electromagnetic wire self-adhesive paint: The zinc phthalocyanine conjugated microporous polymer was mixed with the other components in proportion, stirred at high speed for 25 minutes at a temperature of 45° C. to obtain a high-temperature resistant electromagnetic wire self-adhesive paint, which was then filled and stored. Example

[0031] This embodiment provides a high temperature resistant electromagnetic wire self-adhesive paint, which includes the following components and contents by weight: 60 parts of epoxy resin, 6 parts of plant fiber, 2.5 parts of carbon black, 1.6 parts of diatomaceous earth, 9.5 parts of zinc phthalocyanine conjugated microporous polymer, 1.2 parts of curing agent, 32 parts of solvent, 0.7 parts of surfactant, 5.5 parts of nano metal oxide, and 6 parts of adhesive.

[0032] Among them, the plant fiber is jute fiber; the solvent is a mixture of ethanol, isopropanol and acetone, and the mixing ratio of ethanol, isopropanol and acetone is 12:2:5; the surfactant is palmitic acid amine.

[0033] The nano metal oxides include nano zinc oxide, nano aluminum oxide and nano silicon dioxide, and the mixing ratio of nano zinc oxide, nano aluminum oxide and nano silicon dioxide is 2:5:5.

[0034] The adhesive is epoxy silicone resin; and the curing agent is fatty amine curing agent.

[0035] Among them, the zinc phthalocyanine conjugated microporous polymer is formed by the polycondensation of tetraaminozinc phthalocyanine and terephthalaldehyde, and the molecular formula of tetraaminozinc phthalocyanine is as follows: .

[0036] The preparation method of the above high temperature resistant electromagnetic wire self-adhesive paint comprises the following steps: S1, preparation of zinc phthalocyanine conjugated microporous polymer: Weigh tetraaminozinc phthalocyanine, mix tetraaminozinc phthalocyanine and terephthalaldehyde in a molar ratio of 1:2, add an appropriate amount of N, N-dimethylacetamide as a solvent, heat to 210°C under nitrogen protection, and react at a constant temperature for 72 hours. After the reaction is completed, rinse with acetone, then use tetrahydrofuran as an eluent for Soxhlet extraction, and dry to obtain a zinc phthalocyanine conjugated microporous polymer. The synthesis route is as follows: Figure 1 As shown; S2, preparation of high temperature resistant electromagnetic wire self-adhesive paint: The zinc phthalocyanine conjugated microporous polymer was mixed with the other components in proportion, stirred at high speed for 15 minutes at a temperature of 50° C. to obtain a high-temperature resistant electromagnetic wire self-adhesive paint, which was then filled and stored. Example

[0037] This embodiment provides a high temperature resistant electromagnetic wire self-adhesive paint, which is the same as Embodiment 1, except that the high temperature resistant electromagnetic wire self-adhesive paint further includes 0.3 parts of beeswax. Example

[0038] This embodiment provides a high temperature resistant electromagnetic wire self-adhesive paint, which is the same as Embodiment 2, except that the high temperature resistant electromagnetic wire self-adhesive paint further includes 0.4 parts of beeswax. Example

[0039] This embodiment provides a high temperature resistant electromagnetic wire self-adhesive paint, which is the same as Embodiment 3, except that the high temperature resistant electromagnetic wire self-adhesive paint further includes 0.6 parts of beeswax.

[0040] In the present invention, epoxy resin is used as a matrix material to provide the main strength and adhesion of the paint film; the addition of plant fiber enhances the toughness and wear resistance of the paint film; carbon black improves its heat resistance and electrical insulation performance; diatomaceous earth has good hygroscopicity and dispersibility, which helps to improve the uniformity and weather resistance of the paint film; zinc phthalocyanine conjugated microporous polymer can significantly improve the heat resistance and chemical stability of the paint film; the curing agent promotes the cross-linking reaction of each component under heating conditions to form a stable paint film structure; the surfactant can reduce the surface tension of the paint and improve the wettability and leveling of the paint film; nano metal oxide is used as a reinforcing filler to further enhance the heat resistance and mechanical strength of the paint film; the adhesive enhances the adhesion between the paint film and the surface of the electromagnetic wire; and the addition of beeswax can enhance the gloss and anti-aging performance of the paint film.

[0041] The paint prepared by the present invention can still maintain good electrical insulation, heat resistance, self-adhesion and mechanical strength under high temperature environment, effectively solving the problem of performance degradation of traditional electromagnetic wire self-adhesive paint under high temperature, and is suitable for various high-temperature electrical equipment, such as high-temperature motors, transformers, etc., and has broad application prospects.

[0042] A series of relevant performance tests were performed on the products prepared in the above Examples 1-6, and the results are as follows: In summary, the electromagnetic wire self-adhesive paint prepared by the present invention has excellent high temperature resistance, strong adhesion, excellent electrical insulation performance, and high mechanical strength. Through the synergistic effect of each component, the heat resistance and chemical stability of the paint film are effectively improved. In a high temperature environment, the self-adhesive paint can still maintain good performance, without problems such as weakened adhesion and decreased heat resistance, and has broad market application prospects.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant electromagnetic wire self-adhesive paint, characterized in that: The high temperature resistant electromagnetic wire self-adhesive paint includes the following components and contents in parts by mass: 40-60 parts of epoxy resin, 3-6 parts of plant fiber, 1.5-2.5 parts of carbon black, 0.9-1.6 parts of diatomaceous earth, 4.5-9.5 parts of zinc phthalocyanine conjugated microporous polymer, 0.6-1.2 parts of curing agent, 24-32 parts of solvent, 0.3-0.7 parts of surfactant, 2.3-5.5 parts of nano metal oxide, and 3-6 parts of adhesive.

2. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The plant fiber is one or more of bamboo fiber, coconut shell fiber and jute fiber.

3. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The solvent is a mixture of ethanol, isopropanol and acetone, and the mixing ratio of ethanol, isopropanol and acetone is (9-12): (1-2): (4-5).

4. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The surfactant is one or more of stearic acid amine, aminoethyl ammonium chloride or palmitic acid amine.

5. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The nano metal oxide comprises nano zinc oxide, nano aluminum oxide and nano silicon dioxide, and the mixing ratio of the nano zinc oxide, nano aluminum oxide and nano silicon dioxide is (1-2): (2-5): (3-5).

6. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The adhesive is one or more of epoxy silicone resin and alcohol silicone resin.

7. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The curing agent is one or more of a polyamide curing agent, an aromatic amine curing agent or an aliphatic amine curing agent.

8. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The zinc phthalocyanine conjugated microporous polymer is formed by polycondensation of tetraaminozinc phthalocyanine and terephthalaldehyde, and the molecular formula of tetraaminozinc phthalocyanine is as follows: 。 9. The high temperature resistant electromagnetic wire self-adhesive paint according to claim 1, characterized in that: The high temperature resistant electromagnetic wire self-adhesive paint also includes beeswax, and the mass fraction of the beeswax is 0.3-0.6 parts.

10. A method for preparing the high temperature resistant electromagnetic wire self-adhesive paint according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, preparation of zinc phthalocyanine conjugated microporous polymer: Weigh tetraaminozinc phthalocyanine, mix tetraaminozinc phthalocyanine and terephthalaldehyde in a molar ratio of 1:2, add an appropriate amount of N, N-dimethylacetamide as a solvent, heat to 210°C under nitrogen protection, and react at a constant temperature for 72 hours. After the reaction is completed, rinse with acetone, then use tetrahydrofuran as an eluent for Soxhlet extraction, and dry to obtain a zinc phthalocyanine conjugated microporous polymer; S2, preparation of high temperature resistant electromagnetic wire self-adhesive paint: The zinc phthalocyanine conjugated microporous polymer is mixed with the other components in proportion, stirred at high speed for 15-30 minutes at a temperature of 40-50° C. to obtain a high-temperature resistant electromagnetic wire self-adhesive paint, which is then filled and stored.

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