新型低醛高强度呋喃树脂的研究

Study on New Type Furan Resin with Low-Free Formaldehyde and High-Tensile Strength

试验研究了聚乙烯醇改性脲呋喃树脂的配方和制备工艺。结果表明,添加适量的聚乙烯醇改性剂,甲醛和尿素的最佳物质的量配比为3∶1,反应温度控制在75～80℃范围和反应时间为60min时,可制得综合性能较好的低游离甲醛高强度的呋喃树脂。并对改性机理进行了初步探讨。

The formula and preparing process of urea formaldehyde resin modified by polyvinyl alcohol （PVA） were investigated. Results show that the good comprehensive performances of urea formaldehyde resin with low-free formaldehyde and high-tensile strength can be obtained under following condition ： adding appropriate amount of PVA modifier, the molar ratio of formaldehyde to urea is 3：1, reaction at 75-80 ℃ and 60 min reaction time. The mechanism of the present reaction was also proposed.