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Insulating heat conduction high-temperature resistant electrical appliance coating and preparation method thereof

A technology of insulation and heat conduction and high temperature resistance, which is applied in the field of insulation, heat conduction and high temperature resistant electrical coatings and its preparation, which can solve problems such as easy cracking, brittle coatings, and unstudied thermal conductivity, and achieve good thermal conductivity and good adhesion.

Inactive Publication Date: 2013-05-08
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhou Wenying and others prepared a thermally conductive insulating coating with epoxy-modified silicone resin as the matrix and silicon nitride and alumina mixed filler as the thermally conductive filler. The thermal conductivity is as high as 1.25w.(m.k)-1, the dielectric constant is 5.7, and the surface resistivity is 3 × 1013Ω.cm and 4.3×1013Ω. It is only suitable for long-term use at 200°C; Geng Shida uses Filling boron nitride with phenolic resin, epoxy resin (physical blending method), etc. to prepare a low-expansion coefficient high-temperature-resistant insulating and heat-conducting coating, which is mainly used for coating electronic circuit substrates; Li Junpeng used acrylate monomers, vinyl silicone oil etc. as the main raw material to synthesize a silicone-modified acrylate emulsion; then surface-treated boron nitride (BN) and additives are added to the above emulsion to make a thermally conductive and insulating water-based adhesive coating. The adhesive coating also has the properties of insulation, heat conduction and high temperature resistance, but the preparation is not suitable for use as a surface coating, and can only be used below 200 degrees. In addition, the thermal conductivity has not been studied, and the coating prepared by pure silicone resin Brittle and easy to crack; Wang Guozhi and others used silicone resin and high temperature resistant fillers to make the coating have high temperature resistance and insulation, and good crack resistance, but they also did not consider the thermal conductivity of the coating

Method used

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  • Insulating heat conduction high-temperature resistant electrical appliance coating and preparation method thereof
  • Insulating heat conduction high-temperature resistant electrical appliance coating and preparation method thereof
  • Insulating heat conduction high-temperature resistant electrical appliance coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An insulating, heat-conducting, and high-temperature-resistant electrical appliance coating, its formula composition is as follows in Table 1:

[0025]

[0026] The preparation method of the insulating, heat-conducting and high-temperature-resistant electrical coating is as follows: during preparation, weigh the raw materials according to the above formula, use a high-speed disperser at a speed of 800-1000 rpm, stir and disperse for 30 minutes, then use a sand mill to grind for 20-50 minutes, and finally The 100-mesh filter screen is filtered to obtain an insulating, heat-conducting, and high-temperature-resistant electrical appliance coating.

[0027] Spray the paint on the tinplate, first cured at 80°C for 15 minutes, then cured at 180°C for 10 minutes, the thickness of the paint film is 100 microns, the adhesion of the paint film is grade 1, and the hardness is 2H; the breakdown voltage is 2050 volts / 0.5 mA, 2 seconds; the heat transfer coefficient is 1.3W / (m 2 ·...

Embodiment 2

[0031] An insulating, heat-conducting, and high-temperature-resistant electrical appliance coating, its formula composition is as follows in Table 2:

[0032]

[0033] The preparation method of the insulating, heat-conducting and high-temperature-resistant electrical coating is as follows: during preparation, weigh the raw materials according to the above formula, use a high-speed disperser at a speed of 800-1000 rpm, stir and disperse for 30 minutes, then use a sand mill to grind for 20-50 minutes, and finally The 100-mesh filter screen is filtered to obtain an insulating, heat-conducting, and high-temperature-resistant electrical appliance coating.

[0034] Spray the paint on the tinplate, first cured at 80°C for 15 minutes, then cured at 180°C for 10 minutes, the thickness of the paint film is 100 microns, the adhesion of the paint film is grade 1, and the hardness is 2H; the breakdown voltage is 2100 volts / 0.5 mA, 2 seconds; the heat transfer coefficient is 1.6W / (m 2 ·...

Embodiment 3

[0038] An insulating, heat-conducting, and high-temperature-resistant electrical appliance coating, its formula composition is as follows in Table 3:

[0039]

[0040] The preparation method of the insulating, heat-conducting and high-temperature-resistant electrical coating is as follows: when preparing, weigh the raw materials according to the above formula, use a high-speed disperser to disperse them evenly, and then use a sand mill to grind for 20-50 minutes, and filter through a 100-mesh filter to prepare Insulation, heat conduction and high temperature resistant electrical coating.

[0041] The paint is sprayed on the tinplate, cured at 80°C for 15 minutes, then cured at 180°C for 10 minutes, the thickness of the paint film is 100 microns, the adhesion of the paint film is grade 1, and the hardness is 2H; the breakdown voltage is 2010 volts / 0.5 mA, 2 seconds; the heat transfer coefficient is 1.4W / (m 2 ·K); 250°C constant temperature for 48 hours, the paint film is smoo...

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Abstract

The invention discloses an insulating heat conduction high-temperature resistant electrical appliance coating which consists of the following components in percentage by mass: 30-60% of epoxy organic silicon resin, 1-20% of common filler, 10-50% of aromatic hydrocarbon solvent, 1-10% of ester solvent, 0.1-2% of antifoaming agent, 1-5% of coupling agent and 20-50% of heat conduction filler. A preparation method of the insulating heat conduction high-temperature resistant electrical appliance coating comprises the steps of sufficiently dispersing the components, grinding and filtering. The prepared insulating heat conduction high-temperature resistant electrical appliance coating has relatively good adhesion, high-temperature resistance and better heat conduction capability.

Description

technical field [0001] The invention relates to an insulating, heat-conducting, high-temperature-resistant electrical coating and a preparation method thereof. Background technique [0002] In recent years, developed countries in Europe and the United States have successively transferred all kinds of civilian electrical products to my country for production, and the demand for insulating, heat-conducting and high-temperature-resistant electrical coatings is also increasing day by day. In addition, there are few coatings on the market that can simultaneously possess the excellent properties of insulation, heat conduction and high temperature resistance. Domestic research on high-temperature coatings mainly focuses on heat insulation and ablation resistance, and little attention is paid to its thermal conductivity. Therefore, research on thermally conductive and insulating coatings is scarce. Rarely reported. [0003] High temperature-resistant heat-conducting insulating coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D183/06C09D7/12C09D5/25C08G77/14
Inventor 何彦萱尚小琴汤敏妮黄代俊刘汝锋郭俊浩郭侍衡
Owner GUANGZHOU UNIVERSITY
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