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Polyisocyanurate insulation boards

Polyisocyanurate is a thermoset plastic.[1] It is also called PIR, polyiso, or ISO. It is usually made as a foam. It is used as rigid thermal insulation. It is similar to polyurethane (PUR) except that the proportion of methylene diphenyl diisocyanate is higher and a polyester-derived polyol is used in the reaction instead of a polyether polyol. Catalysts and additives used are also different from those used in PUR.

References[change | change source]

  1. Building Science Corporation (January 2007). "Guide to Insulating Sheathing" (PDF). p. 6.[permanent dead link]

Other websites[change | change source]