有机硅乳液改性脲醛树脂胶粘剂的研究  

Modification of urea-formaldehyde resin adhesive with silicone emulsion

作　　者：田启魁[1] 时君友[1] 

机构地区：[1]北华大学木材科学与工程系,吉林吉林132013

出　　处：《粘接》2010年第5期33-35,共3页Adhesion

基　　金：科技部农业转化资金项目(2007GB2B10078);吉林省科技发展计划重点项目(20060401-2);国家重点基础研究项目(973计划2004CB719706)

摘　　要：采用对比实验,考查有机硅乳液加入时间、加入量等因素对脲醛树脂的改性效果,将制成的改性脲醛树脂胶粘剂压制三层杨木胶合板,检测胶合板的甲醛释放量和胶合强度等指标。试验结果表明,改性效果最佳的nF/nU为1.2,当有机硅的加入量为树脂总量的5%,加入方式为树脂合成后期加入,对于提高树脂胶合强度、降低游离甲醛及甲醛释放量效果最佳。Using contrast experiments, effect of feeding time and added amount of silicone emulsion on modification result of the urea-formuldehyde （UF） resin was investigated.Three-tier poplar polywood was prepared by pressing with the obtained modified UF resin and the formaldehyde emission ahd bonding strength of the polywood were determined.The results showed that the best molar ratio of formaldehyde and orea is 1 ~2; when 5% silicone by weight of total resin was added during the last synthesis period, the modified resin can get higher bonding strength, lower free formaldehyde and formaldehyde emission.

关 键 词：有机硅 胶合强度 游离甲醛 甲醛释放量 

分 类 号：TQ433.431[化学工程]