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 .

苯酚与甲条件下经加成、缩合制得发酚树脂，该树脂和表剂、发泡剂、固化剂一起发泡即得酚泡沫塑料。