| abstract |
Provision of flexible polyurethane foam with improved sound absorption in the low frequency range.n n n Flexible polyurethane by foaming in a closed mold using a raw material composition (E) containing a high molecular weight polyoxyalkylene polyol (A), an organic polyisocyanate compound (B), a foaming agent (C), and a catalyst (D) As a method for producing a foam, at least a part of the high molecular weight polyoxyalkylene polyol (A) has an average number of hydroxyl groups of 2 or more, a molecular weight (Mc) of 1800 to 2800 per hydroxyl group, and a total unsaturation (USV) of 0.08 meq / g. A method for producing a flexible polyurethane foam, which is a polyoxyalkylene polyol (p) or less and having a breathability of a flexible polyurethane foam foamed to a thickness of 26 mm using a raw material composition (E) of 0.085 m 3 / min or less. |