Research on Thin-coated Powder Coatings with Excellent Insulation Performance

Abstract: In recent years, with the rapid development of the coating industry, thin-coated powder coatings have been widely used in all aspects of society and play a vital role

Keywords: insulation; excellent performance; thin coating powder coating

0 Preface

The powder coatings used at this stage have many advantages, are more prominent in terms of energy saving and environmental protection, and have high decorative and safe coating online coatingol.

China is a big automobile country, and the automobile industry is also booming.

1 Significance of research on thin-coated powder coatings with excellent insulation properties

Thin-coated powder coatings with excellent insulating properties can be applied to many industries.

2 Experimental analysis

2.

According to the past technology powder coating formula, the raw material formula for experiment can be formulated (Table 1)

2.

Experiment Equipment needed: insulation voltage tester, electrostatic spray gun, bake salt spray test me, thickness and so on

2.

According to the raw material formula table, purchase raw materials that meet the requirements and mix them evenly.

2.
4 Experimental method

The experimental method is shown in Table 2
.

3 Analysis of factors affecting the performance of powder coatings

The influencing factors of powder coating insulation are mainly analyzed from the following aspects: the characteristics of different materials, the difference in coating curing temperature and time, and the difference in pretreatment methods of the workpiece
.
Due to the space limitation of the battery pack of new energy vehicles, the thickness of the battery coating is usually required to be 0.
1~0.
15mm
.
In addition, in the production process of powder coatings, other impurities are easy to enter, thereby reducing the insulation performance of powder coatings
.

3.
1 The influence of different epoxy resins on electrical insulation properties

The film-forming stage of powder coatings mainly depends on the epoxy resin composition.
Therefore, the properties of different epoxy resins are directly related to the insulation performance of the coating
.
Bisphenol A epoxy resin has excellent properties in all aspects.
Considering heat resistance and mechanical strength, bisphenol A epoxy resin is sufficient as an excellent raw material for insulating powder coatings
.
Choose one-step and two-step epoxy resins made by different manufacturers, and determine other materials to compare the effects of different epoxy resins on various aspects of the coating properties
.

3.
2 The effect of curing agent dosage on coating performance

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3%~0.
6%
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3.
4

Barium sulfate will seriously affect the electrical insulation performance of the coating, while aluminum oxide and light calcium carbonate can improve the insulation performance of the coating.
There are residual metal particles, and light calcium carbonate does not have sufficient acid resistance, which will cause some conductive impurities to remain.
The mixing of the two impurities will affect the electrical insulation performance of the coating
.
Silicon micropowder has a high dielectric constant and can guarantee sufficient electrical insulation performance.
Therefore, silicon micropowder is the most widely used insulating powder

4 Conclusion

In the new energy automobile industry at this stage, the requirements for powder coatings are relatively high, especially in terms of insulation and pressure resistance
.
In order to meet the ever-increasing requirements, every link of production and use should be strictly controlled.
The purchase of raw materials should be strictly screened and checked to ensure that the quality of raw materials meets the production requirements; the formula formulation link should pass multiple experiments to meet customer needs And related standards; the production process is precisely controlled to prevent impurities from being mixed into it; only then can powder coatings with excellent performance in all aspects be produced
.
In addition, pay attention to the preparation of insulating refinish paint
.

In order to ensure that the performance of all aspects of the coating is sufficiently excellent, the following aspects need to be done: ①Use the epoxy resin produced by the two-step method, and according to the actual situation, match the resin of different epoxy equivalent, with the help of imidazole catalysts to ensure the coating The cross-linking density of the layer is high enough, which is conducive to the production of a good coating with dense, complete and uniform texture
.
② Strictly control the selection of materials.
For example, when selecting fillers, ensure that the dielectric constant is low and the resistivity is high, so as to ensure that the coating has excellent electrical insulation and heat resistance
.
③During the production process, special production facilities are used to prevent other impurities from entering, and reduce the impact of impurities and metal particles on the electrical insulation performance
.