Polyurethane foams from isocyanate, polyester polyol and chlorodifluoromethane

摘要

Process for manufacture of polyurethane and poly(urethane/isocyanate) foams utilizing higher levels of aromatic polyester polyols in the polyol component through the substitution of CHClF2 for at least a portion of the conventional blowing agents to provide a foamed product of lower combustibility and lower brittleness.