Definition of polyisocyanurate in English:

polyisocyanurate

Pronunciation /ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjʊəreɪt/ /ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjʊərət/ /ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjɔːreɪt/

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.