Rigid polyurethane foam, process for producing the same, and heat insulators and refrigerators using such polyurethane foam

摘要

A rigid polyurethane foam produced by reacting a special polyol component with an isocyanate component in the presence of a blowing agent containing water in an amount of 2 to 3.5% by weight per 100% by weight of the polyol component is excellent in fluidity with balanced excellent properties.