耐水和低游离甲醛脲醛树脂的合成与改性  

Synthesis and Modification of Low Content and Water Proof Urea Formaldehyde Resin

作　　者：刘慧[1] 邱伟[1] 吴昊[1] 王洪[1] 

机构地区：[1]绵阳师范学院化学与化学工程学院,四川绵阳621000

出　　处：《绵阳师范学院学报》2010年第11期46-50,共5页Journal of Mianyang Teachers＇ College

摘　　要：为寻求合适的工艺条件以提高脲醛树脂胶粘剂的综合性能,采用了降低甲醛/尿素物质的量比、改进合成工艺、加入改性剂等3种途径优化了脲醛树脂的合成方法。实验结果表明:以甲醛和尿素为单体,添加适量的聚乙烯醇和三聚氰胺改性剂,甲醛和尿素最佳物质的量比约为1.5:1,尿素分3次(11.4 g、0.5 g、0.2 g)投料,反应温度控制在(35℃-85℃),反应时间约60 m in,用聚乙烯醇和三聚氰胺进行改性,可制得综合性能较好的低毒耐水脲醛树脂胶粘剂.产品质量达到国家相关规定指标。Urea formaldehyde resin（UF） with improved properties has been prepared.To find proper reaction conditions,the research employs three optimizing measures： decreasing the molar ratio of formaldehyde to urea,modifying synthesis methods and adding modified reagent.The result shows that a low-toxicity,water-resisting urea-formaldehyde resin with good performances has been obtained by adding PVA or melamine to achieve a molar ratio of formaldehyde to urea of 1.5：1 and adding urea in three stages.The optimized reaction temperature is 85℃ with a reaction time of 60 min.The quality of the sample obtained satisfies the requirement of Chinese national standard.

关 键 词：三聚氰胺 聚乙烯醇 脲醛树脂(UF) 游离甲醛 耐沸水性 改性 

分 类 号：O226[理学—运筹学与控制论]