UV-Curable Powder Coatings; Optimization of Coating Performance
Fall 2002 Vol. 4, No. 2
The resin system and the additives used have the same major impact on the properties of UV powder coatings that
they do in all other coating systems. The composition of the coating formulation of UV powder coatings will affect the
flow, chemical resistance and flexibility of the coating. With additives, surface effects like gloss reduction or texture
effects are introduced and presented. What is important is the effect of the cure conditions on the network formation.
The influence of cure temperature, UV dose and UV spectrum were investigated with different calorimetric methods
and are described in this paper.
Similar to conventional powder coatings, the resin system and the additives used affect the final properties of the
coating. Also, the parameters of UV curing can have a strong impact on the final coating performance, comparable to
the temperature/time curing window of conventional powder coatings. Variables in the curing process of the UV powder
formulation are parameters like temperature, amount of UV light energy of UV light and the spectral output of the lamp.