| abstract |
A soft polyurethane foam molded article, which has good air permeability and good cushioning property, while being well suppressed in cell coarsening in the skin portion, is produced by using a raw material derived from natural fats and oils. Specifically, a mold release agent (X) containing a first polysiloxane compound (S1) having a number average molecular weight of not less than 1,200 but not more than 40,000, wherein an organic group having an alkylene oxide chain is bonded to some silicon atoms constituting the polysiloxane chain, is applied to the inner surface of a mold, and then a reactive mixture (Y) containing a polyol (A) including a polyol (A1) derived from vegetable fats and oils, a polyisocyanate compound (B) and a silicone foam stabilizer (S) composed of a second polysiloxane compound (S2) having a number average molecular weight of not less than 150 but less than 1,200 is foamed within the mold. |