Polyisocyanurate

Polyisocyanurate, often abbreviated as PIR, is a type of thermoset plastic that is derived from the polymerization of isocyanate and polyol. It is a member of the polyurethane family, but with a higher degree of rigidity and thermal stability. Polyisocyanurate is primarily used for its excellent insulating properties, making it a popular choice in the construction and manufacturing sectors.