Radiation curing wood coatings have technological and ecological advantages compared to physically drying or chemically crosslinking systems. However, these techniques are characterised by high energy and maintenance costs. They could be significantly reduced by use of UV-LED irradiation technology if suitable coating formulation were available. The present work focused on highly reactive binders and, in particular,
on photo-initiators whose absorption characteristics are adjusted to the available UV-LED irradiation sources. Acrylic resins as well as variously modified vegetable oils were applied as binding agents. In order to overcome oxygen-caused inhibition of the crosslinking reactions, which may impair the surface quality of a coating, cationic systems were investigated along with radically crosslinking coating formulations. As a result of this work, it could be shown that some of the radically crosslinking formulations could be processed to mechanically and chemically highly resistive wood
coatings by use of UV-LED technology at high feed rates.