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Self-adhesive corona-resistant polyimide paint, enameled wire and preparation method thereof

A technology of polyimide paint and polyimide, which is applied in the direction of cable/conductor manufacturing, primer, circuit, etc., can solve the problems of lack of international competitiveness and lack of competitive advantage, achieve good application prospects, and improve electrical resistance Halo and other performance, the effect of simple operation process

Inactive Publication Date: 2020-07-14
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality and brand of various domestic wire enamel products are not yet sufficiently competitive internationally, especially for high-end wire enamel brands, which are lackluster and lack competitive advantages. Therefore, the development of high-end wire enamel and enameled wire is imminent and imperative Row

Method used

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  • Self-adhesive corona-resistant polyimide paint, enameled wire and preparation method thereof
  • Self-adhesive corona-resistant polyimide paint, enameled wire and preparation method thereof
  • Self-adhesive corona-resistant polyimide paint, enameled wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] With 100g of Heine epoxy resin, 500g of N,N,N',N'-tetraglycidyl-2,2-bis[4-(4-aminophenoxy)phenyl]propane TGBAPP, 50g Add 4,4'-diaminodiphenylsulfone into the reaction kettle, stir, heat up to 70°C-80°C, stir and react for 0.5 hours, add 300g of CE793 epoxy resin, stir well, cool to room temperature, add 30g m-xylylenediamine, and mix well at room temperature to obtain self-adhesive paint, denoted as SA-1.

[0067] 100g of Heine epoxy resin, 800g of N,N,N',N'-tetraglycidyl-2,2-bis[4-(4-aminophenoxy)phenyl]propane TGBAPP, 80g of Add 4,4'-diaminodiphenylsulfone into the reaction kettle, stir, heat up to 70°C-80°C, stir and react for 1 hour, add 600g of CE793 epoxy resin, stir well, cool to room temperature, add 20g m-xylylenediamine, and mix well at room temperature to obtain self-adhesive paint, denoted as SA-2.

[0068] 100g of Heine epoxy resin, 1000g of N,N,N',N'-tetraglycidyl-2,2-bis[4-(4-aminophenoxy)phenyl]propane TGBAPP, 100g of Add 4,4'-diaminodiphenylsulfone i...

Embodiment 2

[0070]The performance test of the self-adhesive paint in Example 1, including viscosity, cohesive force, volume resistivity of the cured product, dielectric loss of the cured product, and breakdown field strength of the cured product, the specific test results are shown in Table 1, and the test method is as follows:

[0071] 1. Viscosity test

[0072] The CAP2000+ viscometer produced by Brookfield Corporation of the United States was used for testing, the rotor was selected as No. 1, and the temperature range was 25 °C.

[0073] 2. Adhesion test

[0074] The wound spiral copper wire is immersed in the self-adhesive paint, cured at 180°C for 1 hour, and the adhesion test is carried out by a computer-controlled electronic universal testing machine. Three samples are tested for each formula, and then the average value is taken.

[0075] 3. Volume resistivity test

[0076] Apply the self-adhesive paint evenly to a circular mold with a diameter of 110mm, solidify at 180°C for 1 h...

Embodiment 3

[0085] 19.8g (0.1mol) of 4,4'-diaminodiphenylmethane, 26.0g (0.13mol) of 3,4'-diaminodiphenyl ether and 36.6g (0.1mol) of 2,2-bis( 3-Hydroxy-4-aminophenyl) aromatic dibasic primary amine of hexafluoropropane, 400.0 g of N,N-dimethylformamide and 232.8 g of N-methyl-2-pyrrolidone Add the protic organic solvent into the reaction kettle, stir and dissolve at room temperature, add 43.6g (0.2mol) of pyromellitic dianhydride and 32.2g (0.1mol) of 3,3',4,4'-tetracarboxydiphenyl Aromatic dibasic anhydride of ketone dianhydride, stirring and reacting at room temperature for 1 hour, adding 69.1 g of 3-aminopropyltrimethoxysilane coupling agent-treated silica inorganic nanopowder and 10.0 g of 3-ammonia The titanium dioxide inorganic nanopowder treated with propyltrimethoxysilane coupling agent was stirred and ground evenly to obtain 870.1 g of corona-resistant polyimide paint, which was designated as CR-1.

[0086] 23.0g (0.115mol) of 4,4'-diaminodiphenyl ether, 20.0g (0.1mol) of 3,4'-...

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Abstract

The invention relates to self-adhesive corona-resistant polyimide paint, an enameled wire and a preparation method thereof. Specifically, the self-adhesive corona-resistant polyimide paint provided bythe invention is composed of self-adhesive paint and corona-resistant polyimide paint. The enameled wire is composed of a red copper wire inner core and a self-adhesive corona-resistant polyimide paint outer layer. The invention also relates to a preparation method of the self-adhesive corona-resistant polyimide paint and the enameled wire, the method is simple in process and environment-friendly, and the obtained product is excellent in comprehensive performance, is very suitable for manufacturing coil windings of high-power motors and large high-power transformers, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of electrical insulating materials and electromagnetic wires, in particular to a self-adhesive corona-resistant polyimide paint, enameled wire and a preparation method thereof [0002] technical background [0003] Enameled wire plays a very important role in people's daily life. From small hair dryers to deflection coils of large machines, enameled wires are inseparable. However, the enameled wires commonly used in the market are all wound into coils after being coated, and then heated by dipping to bond the turns of wires together. This process has some disadvantages, such as the unpredictable penetration inside the coil, and often there will be air bubbles and inability to stick; after the impregnating varnish penetrates into the coil, after evaporating the solvent, it may have some physical and chemical effects on the coil. reaction, and the evaporated solvent will also pollute the environment and even cause a fir...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D179/08C09D5/18C09D5/00C09D5/25C09D7/62H01B3/30H01B7/02H01B7/295H01B13/06H01B13/16H01B13/30
CPCC08K2003/2241C08K2003/2272C08K2201/011C08L2203/20C08L2205/025C09D5/00C09D5/002C09D5/18C09D163/00C09D179/08C09D7/62H01B3/306H01B7/02H01B7/295H01B13/065H01B13/16H01B13/30C08L63/00C08K9/06C08K3/22C08K3/36
Inventor 夏宇虞鑫海李紫璇周成刘艳婷
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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