A process for producing a flexible polyurethane foam which comprises foaming a starting material composition (E) comprising a high molecular weight polyoxyalkylene polyol (A), an organic polyisocyanate compound (B), a blowing agent (C) and a catalyst (D) in a closed mold, characterized in that at least a part of the high molecular weight polyoxyalkylene polyol (A) is a polyoxyalkylene polyol (p) having at least two hydroxyl groups on the average and having a molecular weight (Mc) per hydroxyl group of from 1,800 to 2,800 and a total unsaturation value (USV) of at most 0.08 meq/g, and that the air flowability of a flexible polyurethane foam obtained by foaming the starting material composition (E) in a thickness of 26 mm, is at most 0.085 m3/min.
一种生产软质聚
氨酯泡沫塑料的工艺,包括在密闭模具中发泡由高分子量聚氧
乙烯多元醇(A)、有机多
异氰酸酯化合物(B)、发泡剂(C)和催化剂(D)组成的起始 材料组合物(E)、其特征在于至少一部分高分子量聚氧亚烷基多元醇 (A) 是聚氧亚烷基多元醇 (p),平均至少有两个羟基,每个羟基的分子量 (Mc) 在 1,800 至 2,800 之间,总不饱和值 (USV) 至多为 0.08 meq/g,通过发泡起始材料组合物(E)得到的软质聚
氨酯泡沫的空气流动性至多为 0.085 立方米/分钟,厚度为 26 毫米。