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US 4,307,205 AGranted
Polyester polyols
AssigneeOwens-Corning Fiberglas Corporation
InventorJames P. Bershas
Life of this patent
Estimating the term…
Abstract
The reaction products of bisphenol-A and phthalic anhydride or the brominated derivatives thereof a glycol and/or propylene glycol is employed to produce low flame spread urethane-modified isocyanurate foams.
Claims6
A polyisocyanurate foam produced by reacting an organic polyisocyanate with the reaction product of a reactive mixture comprising bisphenol-A and phthalic anhydride or a brominated derivative of said phthalic anhydride and a glycol and/or propylene oxide.
Dependencies are inferred from the claim text.