A foamable phenolic resin was prepared,through addition,condensation,in the presence of alkali.The resin was foamed with surfactant, foamer,solidifying agent , then the foam phenolplast was given .
苯
与甲
在碱性条件

成、缩合制得可发性
树脂,该树脂和
面活性剂、发
剂、固化剂一起发
即得

沫塑料。
过人工审核,其
达内容亦不代


