粉状脲醛树脂的制备及性能优化  

Preparation and performance optimization of powdered urea formaldehyde resin

作　　者：王博 张彦华[1] 谭海彦[1] 顾继友[1] Wang Bo;Zhang Yanhua;Tan Haiyan;Gu Jiyou(College of Materials and Science Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《中国胶粘剂》2018年第10期15-20,共6页China Adhesives

基　　金：黑龙江省自然科学基金项目(C201404);黑龙江省教育厅科学技术研究项目(12533030)

摘　　要：采用M(三聚氰胺)对UF(脲醛树脂)改性,并经高温干燥过程制备粉状MUF(三聚氰胺改性脲醛)树脂,并对M掺量、M两次添加比例、树脂固含量与固化剂影响MUF树脂性能规律进行探究。结果表明:随三聚氰胺添加量增加,MUF粉状树脂甲醛释放量逐渐降低,胶接强度先增后降,并在w(M)=5%(相对于UF总质量而言)时达到最佳;当M两次添加比例m(M_1)∶m(M_2)=1∶4,树脂胶接强度最大,粉状树脂颗粒均匀,分散性较好;液体MUF树脂固含量为30%时,干燥后制备的粉状树脂胶接强度最大、甲醛释放量最低;m(固体固化剂)∶m(粉状树脂)=15∶100比例混合时,MUF树脂胶粘剂综合性能最佳。Urea formaldehyde （UF） resin was modified by melamine （M）, and powdered melamine modified urea-formaldehyde （MUF） resin was prepared by high-temperature drying process. The amount of M added, the ra- tio of two-time M additions, resin solid content and curing agent on MUF resin performance were also investigated. The results showed that with the increase of melamine addition, the formaldehyde emission of powdered MUF resin decreased gradually, the bonding strength increased first and then decreased and reached the most performance when w（M）=5%. When the two-time addition ratio was 1：4, the resin bonding strength was the largest, the powdery resin particles were uniform and the dispersibility was good. When the solid content of liquid MUF resin was 30%, the powdered resin prepared after drying had the highest bonding strength and the lowest formaldehyde emission. When the mass ratio of solid curing agent and powdered resin was 15：100, MUF resin adhesive had the best com- prehensive performance.

关 键 词：粉状脲醛树脂 三聚氰胺 胶粘剂 胶接强度 甲醛释放 

分 类 号：TQ323.3[化学工程—合成树脂塑料工业]