Cost-Effective Use of Polyurethane Catalyst PC-77 for Large-Scale Rigid Foam Panels Abstract: This article delves into the cost-effective application of Polyurethane Catalyst PC-77 (PC-77) in the production of large-scale rigid polyurethane (PUR) foam panels, a crucial material in construction, insulation, and other industries. We explore the chemical properties of PC-77, its catalytic activity in PUR...