Polyol blend, cellular polyurethane foam product made therefrom, and

Abstract

A polyol blend is disclosed for making cellular polyurethane foam products in the absence of halogenated hydrocarbon blowing agents. The products have good insulating performance, good compressive strength, and excellent dimensional stability. The blend comprises first and second polyols and is suitable for one-shot and two component reaction systems. The first polyol is the reaction product of one or more alkylene oxides and a compound selected from the group consisting of aliphatic diols, triols, pentaerythritol, water in an amount sufficient to form a diol upon reaction with alkylene oxide, and mixtures thereof. The second polyol is the reaction product of one or more alkylene oxides and, in the absence of polyol precursor compounds containing amine moieties, a compound selected from the group consisting of carbohydrates, a mixture of carbohydrates, and a mixture of one or more carbohydrates and one or more compounds selected from the group consisting of aliphatic diols, triols, water in an amount sufficient to form a diol upon reaction with alkylene oxide, and mixtures thereof.