Two-pack Waterborne Polyurethanes for Furniture Coatings

摘要

Water-borne 2K polyurethane systems are a new technology which is already successfully used in many applications. Two examples of formulations show that aqueous 2K PU coatings can be used for wood coatings and more specifically furniture finishes, without having to sacrifice quality. By choosing the right polyol, a requested balance between cost and performance can be reached easily. Some properties like the ease of introduction by hand of the hardener and the determination of the pot-life through the viscosity increase can be optimised by choosing the right solvent to dilute the polyisocyanate. We are convinced that, in the coming years, water-borne 2K PU systems will gain a significant market share and that both new polyols and hydrophilic polyisocyanates will be developed with improved properties.