Stain resistant A new study aimed to synthesise a novel UV-curable reactive diluent by reacting bio-based adipic acid with diethanolamine, followed by functionalising it with glycidyl methacrylate. An UV-curable bio-based oligomer was prepared by a ring-opening reaction of epoxidised castor oil with acrylic acid. The cured coating with 40 wt.% reactive diluent exhibited 86 gloss at 60º, 5H hardness, 5B adhesion, 81.27 ºC glass transition temperature, and maximum thermal decomposition temperature of 454 ºC. The cured coatings have shown impressive stain resistance properties. Potdar et al., Journal of ...