Resin is the most important film-forming substance of powder coatings and the most important component that determines the properties and performance of powder coatings. The choice of resin types determines the quality of the powder coatings products, and the type and performance of the resins determine the composition and use of the powder coatings. For example, if the thermoplastic resin is selected (Like Thermoplastic acrylic resin, thermoplastic hot melt polyamide adhesives), no curing agent is required in the formulation. Under certain conditions of baking temperature and time, the resin melts and forms a coating film with certain physical and mechanical properties and mechanical strength. This change is reversible.
The thermosetting resin is selected so that it has to be matched with the curing agent. The resin and curing agent chemically react at a certain baking temperature and time to become a coating film with certain physical and mechanical properties and mechanical strength. This change is irreversible from.
In addition, the epoxy resin in the thermosetting resin is selected so that this powder coating can only be used for corrosion protection and interior products, not for exterior products.
When the polyester resin is selected, this powder coating can be used indoors and outdoors, and the type of resin determines the use of the powder coating.
The resins used in general powder coatings should meet the following conditions. 1. Melting temperature and decomposition temperature of the resin 2. Melt viscosity of the resin 3. Stability of the resin 4. Mechanical crushability of resin 5. Adhesion of resin to the object to be coated (workpiece) 6. Electrical properties of the resin 7. Dispersibility in resin 8. Curing reaction temperature of the resin 9. Reaction by-product of resin and hardener 10. Color and toxicity of the resin 11. Source and price of the resin
iSuoChem is the professional supplier of resin and additives over 15 years. We focus on printing ink resin for coating, paintss and printing industry.
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