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 .
苯酚与甲醛在碱性条件下经加
、缩合制得可发性酚醛树脂，该树脂和表面活性
、发泡、固化一起发泡即得酚醛泡沫塑
。
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