Classification of thermosetting powder coatings

Update:27 Jul,2022
With the progress of life, people's awareness of environmental protection is getting stronger and stronger. If it is not strong, it is really dangerous. Therefore, the requirements for environmental protection materials are getting higher and higher. Then, let's talk about decoration. The most environmentally friendly material, that is thermosetting powder coating. If you are not familiar with it, now we will introduce in detail what is thermosetting powder coating and the types of thermosetting powder coating.

What is Thermosetting Powder Coatings Types of Thermosetting Powder Coatings
Thermosetting powder coatings use thermosetting resins as film-forming substances, and add a curing agent for cross-linking reaction to form an insoluble and infusible hard coating after heating. Since the resin used in the thermosetting powder coating is a prepolymer with a low degree of polymerization, the molecular weight is low, the leveling of the coating is good, and it has good decorative properties. The macromolecules of network cross-linking are formed, so the coating has better corrosion resistance and mechanical properties. Thermosetting powder coatings can be divided into the following categories:

1. Thermosetting polyester powder coating
The unique properties of thermosetting polyester powder coatings are that they are better than epoxy resins in weather resistance and UV resistance. In addition, because polyester resin has polar groups, the powder rate is higher than that of epoxy resin, it is not easy to yellow during the baking process, has high gloss, good leveling, full paint film, light color and other characteristics. Very decorative. Generally used in refrigerators, washing machines, vacuum cleaners, instrument housings, bicycles, furniture and other fields.

2. Thermosetting epoxy powder coating
Thermosetting epoxy powder coatings are composed of epoxy resins, curing agents, pigments, fillers and other additives. They are the earliest varieties developed in thermosetting powder coatings. They have excellent adhesion to metals, corrosion resistance, hardness and flexibility. and impact strength, widely used in all walks of life.

3. Thermosetting polyurethane powder coating
The coating has strong decorative properties, is smooth and tough, and takes into account both outdoor weather resistance and corrosion resistance. It is currently one of the best weather resistance powder coatings in China.

4. Thermosetting epoxy polyester powder coating
Based on polyester resin and epoxy resin with carboxyl group, the thermosetting epoxy polyester powder coating is processed by combining with pigments, fillers and other components. It is currently the most widely used and most productive powder coating in the world. .