Classification of powder coatings manufacturers

Classification of powder coatings manufacturers

Thermosetting powder coating is a kind of hard and insoluble coating which takes thermosetting resin as film forming material and adds curing agent to form cross-linking reaction after heating. If the temperature is higher, the coating will not soften like thermoplastic coating, but only decompose. Because the resin used in thermosetting powder coatings is prepolymer with lower polymerization degree and lower molecular weight, the coating has better leveling and decorative properties, and the low molecular weight prepolymer can form a network of crosslinked macromolecules after curing, so the coating has better corrosion resistance and mechanical properties. Therefore, thermosetting powder coatings are made of epoxy powder coatings. Because of its excellent adhesion to metals, corrosion resistance, hardness, flexibility and impact strength, it is the first variety of thermosetting powder coatings. The preparation of epoxy powder coatings is composed of epoxy Resin, curing agent, pigment, filler and other assistants. The contribution of these components to the properties of the powder coatings is mutual restraint and influence. A suitable formulation is actually the result of the coordination of various components. Polyester powder coatings. Polyester powder coatings have unique properties compared with other types of powder coatings. The weather resistance and UV resistance are better than those of epoxy resin. In addition, polyester resin with polar groups, so the flour rate is higher than epoxy resin, baking process is not easy to yellowing, high gloss, good leveling, film plump, light color and other characteristics, so has a good decorative properties. Generally used in refrigerators, washing machines, vacuum cleaners, instrument housings, bicycles, furniture and other fields.

Powder coatings are completely different from ordinary paints. They exist in the state of fine powder. Because they do not use solvents, they are called powder coatings. The main features of powder coatings are: harmless, efficient, saving resources and environmental protection characteristics.

It has two main categories: thermoplastic powder coatings and thermosetting powder coatings.

Thermoplastic powder coatings are composed of thermoplastic resins, pigments, fillers, plasticizers and stabilizers. Thermoplastic powder coatings include: polyethylene, polypropylene, polyester, polyvinyl chloride, chlorinated polyether, polyamide, cellulose, polyester.

Thermosetting powder coatings consist of thermosetting resins, curing agents, pigments, fillers and auxiliaries. Thermosetting powder coatings include: epoxy resin, polyester, acrylic resin.

Disadvantages: uneven powder on edges and corners, difficult to hide film after curing and high curing condition.

There are many classification standards, and the names of all kinds of powder on the market are uneven. According to the properties of film-forming materials, they are classified into two categories: thermoplastic powder coatings and thermosetting powder coatings. Or the appearance of film forming material can be divided into extinction type, high gloss type and fine art type. It can also be divided into two main categories: indoor and outdoor.