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1. Basic Overview of the Product
Epoxy powder coatings are known for their durability and corrosion resistance and are used across a wide range of industries, including automotive parts, household appliances, and water-related materials. These coatings are based on bisphenol A glycidyl ether epoxy resin, offering high applicability in painting operations.
2. Technical Details
Epoxy powder coatings, due to their unique chemical composition, have a sharp softening point and low melting viscosity, allowing for the formation of a uniform coating. The main curing agents used are dicyandiamide, imidazole, imidazoline compounds (sometimes in combination with accelerators), anhydrides, and dibasic acid dihydrazides, which facilitate the curing process of the coating, enhancing chemical resistance and heat resistance. The electrostatic spray method is commonly used for application, allowing for adjustable film thickness. Designed for durability, preheating enables achieving up to a 500µm film thickness, suitable for applications requiring thick coatings.
3. Advantages
The most significant advantages of epoxy powder coatings lie in their superior primary physical properties, corrosion resistance, chemical resistance, and heat resistance. These characteristics make them especially suitable for use under harsh environmental conditions, enabling long-term protection of products.
4. Disadvantages
However, epoxy powder coatings have limited weatherability outdoors, particularly prone to gloss loss (chalking). Therefore, their use on outdoor products where appearance is paramount is not recommended. Additionally, the painting process for thick coatings may incur increased costs and time.