反应型聚氨酯装订热熔胶的研究

Study on reactive hot-melt polyurethane adhesive for book-binding

以聚醚多元醇为基本原料,辅以多种添加剂,与多异氰酸酯聚合,得到一种性能优异的反应型单组分聚氨酯热熔胶;探讨了增粘树脂、稀释剂等对产品性能的影响;用化学分析和红外光谱对固化过程进行了表征。结果表明:合成过程中应控制n(NCO)/n(OH)在1.5-2.5,其产品软化点为80-90℃;产品性能优于HG/T 3698- 2002标准,可用于书本无线装订。合成工艺简单,成本与EVA型装订胶相近,而粘接强度、柔韧性、耐低温、耐溶剂性能等却优于EVA型热熔胶,具有很好的应用前景。

Through the reaction of polyether polyols as the basic material and many additives with polyisocyanate, an onecomponent polyurethane hot-melt adhesive was synthesized, which had excellent performance, The Effects of tackifying agent, diluent etc on the properties of adhesive were investigated, and the curing process of the adhesive was characterized by chemical analysis and IR, The results showed that NCO/OH should be controlled in 1.5-2, 5 during the reaction and the softening point of the product was 80-90℃. The properties of product is better than the requirement of HG/T 3698-2002, so that it can be used in unsewn book-binding. The preparing technology is simple, the cost is near to that of EVA type adhesive, its bonding strength, flexibility, resistance to low temperature and solvent are overpass that of EVA type adhesive far and away. It has very good further.