Tin-Free Catalysts: Navigating the Landscape of Eco-Friendly Polyurethane Coatings Abstract: Polyurethane (PU) coatings are ubiquitous in various industries due to their versatility, durability, and excellent mechanical properties. Traditionally, organotin compounds have been the catalysts of choice for PU synthesis, facilitating the reaction between isocyanates and polyols. However, growing environmental concerns regarding the toxicity and bioaccumulation...