Tertiary Amine Catalysts in Two-Component Polyurethane Rigid Insulation Foam: Function, Properties, and Performance Abstract: Polyurethane (PU) rigid insulation foams are indispensable materials in construction, refrigeration, and other industries due to their excellent thermal insulation properties and structural integrity. The formation of these foams relies heavily on the catalytic activity of tertiary amines within the two-component...