A polymer of cyanuric acid (a cyclic molecule with the formula (CHNO)₃), specifically as used for insulation purposes and as a fire retardant in a formulation which sets as rigid foam.
Origin
1970s; earliest use found in Analytical Chemistry.
Definition of polyisocyanurate in US English:
polyisocyanurate
noun
A polymer of cyanuric acid (a cyclic molecule with the formula (CHNO)₃), specifically as used for insulation purposes and as a fire retardant in a formulation which sets as rigid foam.
Origin
1970s; earliest use found in Analytical Chemistry.