Photopolymerization of wood coatings under visible lights

The possibility of using visible lights and sun to cure acrylate based coatings onto wood and the performance attained, compared to an artificial UV light exposure, have been studied. The kinetics of the polymerization, carried out on glass plates and wood substrates, as well as two physical properties (hardness and final coloration) were determined as a function of the photoinitiating systems PIS. Several PIS which allow a satisfactorily compromise between reactivity and yellowing are selected.