工业固废脲醛树脂降解处理及再生树脂性能初探  

Study on the degradation of industrial solid waste urea-formaldehyde resin and its application in regenerated resin

作　　者：刘国伟 崔亮 王辉[1] LIU Guo-wei;CUI Liang;WANG Hui(Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products,Southwest Forestry University,Kunming 650224,China;Sichuan Huaxiang Forest Products Industrial Co.,Ltd.,Leshan 613100,China)

机构地区：[1]西南林业大学云南省木材胶黏剂及胶合制品重点实验室,云南昆明650224 [2]四川华象林产工业有限公司,四川乐山613100

出　　处：《应用化工》2023年第9期2593-2595,2600,共4页Applied Chemical Industry

基　　金：云南省基础研究计划项目(202001AT070124);云南省青年人才项目(YNWR-QNBJ-2020-142)。

摘　　要：采用热降解处理工业固废脲醛树脂,研究处理条件对树脂降解效果的影响。结果表明,在强酸性(pH≤3)处理环境下,控制甲醛溶液和固废脲醛树脂质量比为4∶1,热处理温度为70~85℃,渗透剂添加量为3%时,树脂的降解率可达99%。继续将其用于脲醛树脂合成用起始原料,在本实验工艺条件下,添加量为甲醛溶液质量5%时,工业试验生产的7层胶合板胶合强度、甲醛释放量等指标可满足国标要求。For solving the waste and pollution problem of cured urea-formaldehyde resin caused by multiple reasons such as inappropriately operation,the industrial solid waste urea-formaldehyde resin was adopted and its degradation was analyzed under various treated factors based on reversible reaction characteristics of urea-formaldehyde resin.The result showed that the degradation rate of treated resin can reach 99%with a condition of strong acid(pH≤3)treatment environment,the mass ratio of formaldehyde solution to solid waste urea-formaldehyde resin 4∶1,the treated temperature(70~85)℃ and 3%ratio penetrant.And it was continued to be used as part raw material for urea-formaldehyde resin synthesis with a content of 5%mass ratio,with which seven-layer plywood was produced according to industrial test,the results of bonding strength,formaldehyde release could meet the requirements of the standard in China.

关 键 词：固废脲醛树脂 降解处理 再生树脂 胶合板 

分 类 号：TQ323.3[化学工程—合成树脂塑料工业]