Protecting the grain
Wood is a challenging substrate, vulnerable to many different deteriorating threads. A new article in the European Coatings Journal describes how dual-curing with water-borne UV polyurethanes can improve wood coatings.
Wood furniture needs protection from a lot of possible threads like surface deterioration through fungal and microbial attack, moisture ingress, tannin staining, and light degradation. Lately the merger of water-based and energy-curing technologies of novel energy-curable polyurethane dispersions (often called UVPUD) opened new ways to balance the properties of wood coatings to achieve exactly this goal.
A straightforward sustainability model for UVPUDs inspired by life cycle analysis.
The article in European Coatings Journal 3/2019 describes that these UVPUDs have good colloidal stability and that their low viscosity makes them particularly suitable for application by spray, curtain or roller onto substrates such as wood. An interesting feature of this raw material is that film formation (drying) and hardening (photo-curing) take place in two distinct steps. Their minimum film formation temperature (MFFT) is usually very low and does not require the use of additional coalescing agents that would contribute to increased VOC levels.
The article describes detailed for new UVPUDS for interior wood coatings thatoffer better intercoat adhesion, reduced yellowing on cure, formulation robustness, and greater chemical and mechanical resistance
The author Michel Tielemans of Allnex of this article will present detailed data and will answer questions during the European Coatings Live Webcast on March 26. Registration is free of charge.
