LOW-RESILIENCE SOFT POLYURETHANE FOAM AND METHOD FOR PRODUCING SAME

摘要

Disclosed is a soft polyurethane foam using no plasticizer which is excellent in low resilience and durability while having high air permeability. This soft polyurethane foam shows only a small change in hardness when the temperature changes. Specifically disclosed is a method for producing a soft polyurethane foam wherein a polyol mixture containing polyols (A) and (B) and monool (D) and a polyisocyanate compound are reacted at an isocyanate index of not less than 90 in the presence of a foaming agent or the like. The polyol (A) is a polyol having an average of 2-3 hydroxyl groups and a hydroxyl number of 10-90 mgKOH/g which is obtained through ring-opening addition polymerization of an alkylene oxide using a composite metal cyanide complex catalyst. The polyol (B) is a polyol other than the polyol (A) which has an average of 2-3 hydroxyl groups and a hydroxyl number of 15-250 mgKOH/g. The monool (D) is a monool having a hydroxyl number of 10-200 mgKOH/g.