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 .

苯与甲醛在碱性条件下经加成、缩合制得发性醛树脂，该树脂和表面活性、发、化一起发即得醛沫塑料。