Definitions for "Polyisocyanurate"
An insulant commonly used in composite panels with improved fire resistance when compared with PUR.
Polyisocyanurate, also referred to as PIR, is essentially an improvement on polyurethane (PUR). Different catalysts are used and the proportion of methylene diphenyl diisocyanate (MDI) is higher than for PUR. Instead of a polyether, a polyester derived polyol is used in the reaction.
A polymer containing isocyanurate groups.