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成、

得可
性酚醛树脂,该树脂和
面活性剂、
剂、固化剂一起

得酚醛
沫塑料。
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