Thermosetting powder coatings are made by using thermosetting resin as film-forming material, adding curing agent and other materials. The cured coating film will not be softened by the increase in temperature.

Commonly used thermosetting powder coatings are: epoxy powder unpainted, polyester powder paint and acrylic powder unpainted.

Epoxy powder coating: Because it has excellent adhesion to metal, corrosion-resistant hardness, flexibility and impact strength, it is the first variety used in thermosetting powder coatings. The epoxy powder and unpainted formulation is composed of epoxy resin, curing agent, pigment, filler and other additives. The contribution of these several components to the performance of the uncoated powder is mutually restricted and affected. A suitable formula is actually the result of the coordination of various components.

Polyester powder coatings: Compared with other types of powder coatings, polyester powder coatings have unique properties. It is better in weather resistance and UV rotation resistance than epoxy resin finger. In addition, because polyester resin has polar groups, the powder loading rate is higher than that of epoxy resin.It is not easy to yellow during baking, high gloss, good leveling, full film, light color and other characteristics. Good decoration. Generally used in refrigerators, washing machines, vacuum cleaners, instrument shells, bicycles, family members and other fields.

Acrylic powder coating: acrylic resin powder uncoated has two types: thermoplastic and thermosetting. The biggest advantages of thermosetting acrylic resin powder coatings are excellent weather resistance, color retention, pollution resistance, strong metal adhesion, and excellent film appearance. It is suitable for decorative powder coatings.

Common heat-resistant powder coatings include: polyurethane powder coatings, polyethylene powder coatings, polyamide powder coatings, fluororesin powder coatings, polypropylene powder coatings, and chlorinated ether powder coatings.

Polyvinyl chloride powder coating: It is one of the cheapest polymers for industrial mass production. It has excellent solvent resistance, good corrosion resistance to water and acids, impact resistance, salt spray resistance, can prevent food pollution and has high insulation strength for electrostatic spraying. It is mainly used for coating polyethylene powder coatings on metal mesh, steel furniture, chemical equipment, etc .: It has excellent corrosion resistance, chemical resistance, excellent electrical insulation and ultraviolet radiation resistance. The disadvantage is that the mechanical strength is not high and the adhesion to the substrate is poor. It can be used in chemical tanks, impellers, pumps, inner walls of pipes, instrument shells, metal plates, refrigerator screens, and automotive parts.