| 摘要 |
PROBLEM TO BE SOLVED: To provide a soft polyurethane foam capable of suppressing yellowing and exhibiting low hardness and low dissolution amount.SOLUTION: Polyols for the soft polyurethane foam include at least two polyether polyols of: a polyether polyol (A) having 2.5 to 3.5 functional groups of hydroxyl groups, and 50 and 80 wt.% of an oxyetyhylene unit; and a polyether polyol (B) having a 2.5 to 3.5 functional groups of hydroxyl groups, and >0 and ≤10 wt.% of an oxyetyhylene unit. A catalyst is an amine-based catalyst alone. A foaming agent is water alone. A polyisocyanate is tolylenediisocyanate alone. The isocyanate index is made 100 to 115. |
