Polyurethane Heat-Sensitive Catalysts in Automotive Prepreg Composite Curing: A Comprehensive Review Abstract: The automotive industry is increasingly adopting prepreg composite materials to achieve lightweighting and enhanced performance. The curing process, a critical step in prepreg fabrication, often relies on catalysts to accelerate crosslinking and ensure desired material properties. This review focuses on polyurethane (PU) heat-sensitive...