Study on Isocyanurate-Modified MDI. 2 — Application for Preparing Rigid Polyisocyanate Foam

Abstract

Some properties of low density rigid polyisocyanurate foam obtained by using isocyanurate-modified polymeric MDI have been investigated and compared with controls using unmodified isocyanate. Friability of foam has been greatly reduced, and foam-cell size has become smaller. The compression strength and dimensional stability of the new foams described have also been improved; especially noteworthy is the excellent dimensional stability which has been obtained at temperatures above 150°C.