Method for the manufacture of polyisocyanurate foams
AssigneeAkzona Incorporated
InventorsKenneth B. White, William J. Largent
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Abstract
A method for the manufacture of polyisocyanurate foams which comprises blending a "B" side with an "A" side that includes an isocyanate. The "B" side comprises a polyester polyol, an amine/quaternary ammonium borate ester blend, a surfactant, a blowing agent, and a metal catalyst in amounts of up to 20% by weight of the total weight of the "B" side. The "B" side remains a homogeneous liquid for at least one day without the need for agitation and the foam formed by this method has a friability not exceeding 30%.
Claims10
A method for the manufacture of polyisocyanurate foams, comprising blending a "B" side with an "A" side, said "A" side comprising an isocyanate and said "B" side comprising a polyester polyol, an amine/quarternary ammonium borate ester blend, a surfactant, a blowing agent, and up to 20% by weight of a catalyst, based on the total weight of said "B" side, and wherein said foams have a friability not exceeding 30%.
Dependencies are inferred from the claim text.