UV powders for wood coatings

UV powders are generally based on unsaturated (meth)acrylate polyesters and urethane (meth)acrylates, photoinitiators and additives (pigments or fillers). All compounds are solids, which make the formulations environmental friendly.

The objective of this work is to correlate the formulations characteristics with the photochemical process and the final coatings properties. The influence of additional acrylate monomers within the formulations is highlighted. RT-FTIR fitted with an environmental cell is used to follow the reactivity during the photopolymerization under temperature and atmosphere control. DMA is performed to estimate the crosslinking density of the final materials.