Polyurethane foams are prepared by reacting an active hydrogen-containing organic compound with an organic polyisocyanate in the presence of a blowing agent and an amylaceous material which has been stabilized either (a) by treating with a stabilizing agent containing an effective amount of an antioxidant capable of inhibiting the formation of oxidation products in the amylaceous material upon exposure to an oxidizing atmosphere or (b) by removing substantially all, or at least a major portion, of the oxidizable materials, particularly fatty acids or fats, from the amylaceous material.
聚
氨酯泡沫塑料的制备方法是:在发泡剂和戊基材料的存在下,使一种活性含氢有机化合物与一种有机多
异氰酸酯发生反应,这种戊基材料经过以下两种方法之一的稳定化处理:(a)用一种稳定剂进行处理,稳定剂中含有有效量的
抗氧化剂,能够抑制戊基材料在暴露于氧化气氛中时氧化产物的形成;或(b)从戊基材料中除去基本上全部或至少大部分可氧化物质,特别是
脂肪酸或脂肪。