COMPOSITION FOR FORMATION OF WATER-EXPANDED RIGID POLYISOCYANURATE FOAM, METHOD FOR PRODUCTION OF WATER-EXPANDED RIGID POLYISOCYANURATE FOAM USING THE COMPOSITION, AND WATER-EXPANDED RIGID POLYISOCYANURATE FOAM PRODUCED BY THE METHOD

摘要

To provide: a composition for forming a rigid polyisocyanurate foam having excellent flame retardancy and excellent mechanical properties by using water alone as a foaming agent; a method for producing a water-expanded rigid polyisocyanurate foam by using the composition; and a water-expanded rigid polyisocyanurate foam produced by the method. Disclosed is a composition for forming a water-expanded rigid polyisocyanurate foam having an isocyanate index of 350 or greater, which is characterized by using an organic polyisocyanate comprising MDI and a MDI-type polynuclear condensate and having a specific average number of functional groups and a polyol comprising a polyether polyol.