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 .

苯酚与甲醛在碱件下经加成、缩合制得发酚醛树，该树面活剂、发泡剂、固化剂一起发泡即得酚醛泡沫塑料。