Powder coatings are solvent-free coatings in solid delivery form.
Solid resin granules, pigment, filler, additives and other functional components in general, just solid and dry components.
Premixing of all solid components in a high-speed mixer. The main dispersing process is done in an extruder at high temperatures (approx. 100 – 120 °C). After extrusion the molten material is fed onto cooling belt to cool it down. Afterwards grinding with high mechanical forces in a suitable mill. Final sieving and classification of particles size distribution. The packaging is usually a carton box with a polyethylene bag inside.
It´s a quite unique application technic, but comparable to electrostatically sprayed liquid coatings. Powder is fluidized by inserting pressured air, transported with behavior like liquid and applied by electrostatically spray to a conductive substrate. Therefore, metals are the most important substrates to be powder coated. Typical application examples are all kind of metal furniture, appliances, facade elements, agricultural machineries, automotive parts or bicycle frames. Nowadays also glass, ceramics, wood, MDF and plastics getting more important due to lower curing temperatures of powder coatings systems.
BYK offers a wide range of additives for powder coatings to improve leveling and prevent craters, to improve processing conditions and to enhance the general performance profile. A special range of additives is used to provide structure or texture effects, to reduce gloss levels and to improve adhesion properties on various substrates. BYK also provides the right additives for clear powder coatings. Additives from BYK are a must for any powder coating to ensure a high level of quality expectations. Our portfolio consists of different product groups to cover a wide variety of applications.
Our technical sales representatives offer our service directly to our customer to help them in technical questions. Supported by regional distributors we ensure a global network of technical service, along with customer visits in person or via WEBseminars. Technical service requests are covered by our powder laboratories in Wallingford (USA), Shanghai (China) and Wesel (Germany). We have a team of experienced experts in each laboratory to answer all technical inquiries and to carry out necessary application tests.
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