POLYISOCYANURATE FOAMS WITH IMPROVED THERMAL STABILITY

摘要

Rigid polyisocyanurate foams having improved thermal stability, foam compositions and dispersions therefor, as well as methods of making the same, are provided with respect to an aromatic polyester polyol or polyol blend thereof having an average hydroxyl functionality of less than about 3.0, a polyisocynate in a sufficient amount to yield an NCO/OH index of at least about 200, a sugar or carbohydrate having a molecular weight of less than about 2000,and a blowing agent. Such foams, foam compositions, and dispersions may also contain flame retardants, stabilizers, and others additives.