Rheological Analysis of Powder Coatings

Powder coatings are a cost effective and an environmentally friendly alternative to liquid coatings. Traditional coating systems form networks via a thermally activated process. This usually involves placing a powder coated surface into an oven at temperatures between 160°C and 200°C. The powder melts at around 80°C to 120°C and becomes an even film. At temperatures between 110°C and 140°C the cross linking reaction starts. The curing time typically lasts between 15 and 30 minutes, depending on the temperature and reactivity of the system.