Thermoset Polyurethane Resin (PUR)

Thermoset Polyurethane Resin appears as a two-component system (polyol and isocyanate) that transforms from a liquid or paste-like consistency to a solid with varying degrees of hardness and flexibility when cured. Key features include excellent abrasion resistance, high tensile and tear strength, good chemical resistance, flexibility across a wide temperature range, and customizable hardness from soft elastomers to rigid solids. Thermoset polyurethanes are primarily used in applications ranging from industrial flooring and automotive parts to footwear and furniture. 

Alternatives include epoxy, polyester, acrylic, silicone, and phenolic resins. Current trends include developing bio-based and low-VOC formulations. Sub-types include specialty formulations tailored for specific performance requirements such as flame retardancy, hydrolytic stability, crosslink density, or optical clarity depending on the polyol and isocyanate chemistry and additives incorporated.