ISOCYANURATE-MODIFIED POLYURETHANE FOAM AND FLAME- RETARDANT HEAT INSULATING PANEL

摘要

PROBLEM TO BE SOLVED: To obtain an isocyanurate-modified polyurethane foam capable of favorably performing foam-in-place molding while suppressing occurrence of shear line and consequently preventing appearance from worsening and strength degradation while maintaining a flame retardance, and a flame-retardant heat insulating panel using the foam. SOLUTION: This isocyanurate-modified polyurethane foam for foam-in-place molding is obtained by reacting a polyisocyanurate component with a polyol component containing an aromatic polyesterpolyol and a polyetherpolyol in the presence of at least a catalyst and a blowing agent. In the polyurethane foam, the average number of the functional groups in the polyol component is 2.0-2.5 and the number of the functional groups in the polyetherpolyol is within the range of 2-4.