1 What is the state of affairs with water-borne PU coatings? 2 Which novel application fields for PU coatings do you consider especially promising and why? 1 Since the 1990s, when the first polyisocyanate for water-borne polyurethanes was introduced, we have invested a lot in the application science and development of new grades. To reduce VOC content as much as possible, solvents are replaced with water. But isocyanates react with water, which could ...