废纸苯酚液化物合成热固型酚醛树脂

Synthesis of Thermoset Phenol-formaldehyde Resin from Liquefied Waste Paper in Phenol

为了提高废纸的附加值,利用废纸苯酚液化物与甲醛在碱性环境中反应,进行热固型酚醛树脂合成实验。通过正交实验确定最优化的树脂化合成工艺为:n(甲醛)∶n(废纸液化物)=2.1,n(氢氧化钠)∶n(废纸液化物)=0.5,合成温度74℃,合成时间3.0h。在此工艺条件下制备的酚醛树脂压制的胶合板达到GB/T9846—2004《人造板及饰面人造板理化性能试验方法》中Ⅰ类胶合板的强度要求。

In order to enhance the additional value of waste paper,the experiment for preparation of thermoset phenol-formaldehyde resin was carried out using the reaction of liquefied waste paper in phenol (LWP) with formaldehyde in alkaline environment. The optimum resin synthesis conditions obtained by orthogonal experiments are as follows:n(formaldehyde):n(LWP) = 2.1,n(NaOH):n(LWP)=0.5,synthesis temperature 74 ℃,synthesis time 3.0 h. The physical properties of the plywood bonded with the phenol-formaldehyde resin prepared under these conditions can meet the first grade strength request of GB/T9846-2004.