introduction polyurethane (pu) resins are widely used in various industries, including coatings, adhesives, sealants, elastomers, and foams. the versatility of pu resins stems from their ability to be tailored for specific applications by adjusting the formulation. one critical factor that influences the performance and processing of pu systems is the curing time. trimethylhydroxyethyl ethylenediamine (tmeea),...