Preparation method of aluminum pigment with high voltage breakdown resistance

Abstract

The invention discloses a preparation method of an aluminum pigment with high voltage breakdown resistance. The method comprises the steps of putting raw materials including spherical aluminum powder, a grinding medium, an environment-friendly solvent oil, oleic acid or erucic acid, and a silicane coupling agent into a ball mill; sealing the ball mill, performing ball milling, and discharging the materials with the environment-friendly solvent oil; conveying the materials through a pipeline into a vibration screen to be screened, removing screen tailings, and putting the materials into a frame filter press to conduct filter pressing, so as to obtain filter cakes with a solid content of 75%; feeding the filter cakes and an alcohol, ether or ester solvent into a reaction kettle, sealing the reaction kettle, increasing temperature under the protection of inert gases, then simultaneously dripping acrylic acid or acrylate monomer and an azo type initiator, continuously increasing the temperature of the reaction kettle, keeping the temperature, discharging materials, and performing filter pressing, so as to obtain the finished product. The aluminum pigment has the characteristic of high voltage breakdown resistance, the construction is convenient, the environment-friendly solvent oil is adopted for ball milling, and detection of all hazardous substances meets standards established by European Union.

Description

Technical field [0001] The invention relates to a method for preparing a coating for the outer surface of a household appliance, in particular to a method for preparing an aluminum pigment with high voltage resistance. Background technique [0002] With the rapid development of my country’s economy and the rapid development of the domestic home appliance industry, home appliance manufacturing technology and home appliance outer surface coating technology and level continue to rise. As the main silver-white metallic pigment used in the home appliance coating industry, flake aluminum pigments have nearly a market demand. The rapid development of aluminum pigment technology has been developing in the direction of high withstand voltage performance, high coverage rate, good flashing effect and special performance. [0003] However, the use of traditional uncoated aluminum pigments in recent years has also exposed some problems that are difficult to overcome by themselves. For example, ...

AI Technical Summary

Problems solved by technology

[0003] However, the use of traditional non-encapsulated aluminum pigments in recent years has also exposed some problems that are difficult to overcome.

For example, the voltage resistance performance of the coating on the outer surface of home appliances formulated with it is significantly insufficient. As the structure of home appliances is developing towards light weight, compactness, and maximum space utilization, the instantaneous voltage on the surface of the casing during the switching process of home appliances is also Due to the limitations of the traditional non-encapsulated aluminum pigment production process, it is impossible to have a higher withstand voltage performance