polyurethane composite antioxidant in polyurethane coatings and adhesives introduction: the invisible hero behind long-lasting materials 🛡️ in the world of modern materials science, polyurethane (pu) is like a chameleon—adaptable, versatile, and often hidden in plain sight. found in everything from car seats to shoe soles, pu coatings and adhesives are prized for their durability, flexibility,...