摘要
采用不同相对分子质量的聚乙二醇(PEG)和甲苯二异氰酸酯(TDI)为原料制备了水溶性聚氨酯热熔胶。讨论了PEG相对分子质量、原料配比、TDI滴加温度、反应时间等对产品性能的影响。结果表明,当PEG8000∶PEG600∶TDI摩尔比为1∶1∶2.28、TDI滴加温度为60～70℃、反应时间为3h时,所得聚氨酯热熔胶软化点为72.5℃、剪切强度为2.668MPa、吸湿率为0.81%,胶丝水溶性优,适用于纸品的粘接,并有利于废纸的回收处理。
The water-soluble polyurethane hot melt adhesive was prepared by using polyethylene glycol （PEG） with various molecular weights and toluene diisocyanate （TDI） as raw materials. The influences of PEG molecular weight, raw materials ratio, TDI adding temperature and reaction time on product properties were discussed. The results showed that the softening point of the polyurethane hot melt adhesive was 72.5℃ , shear strength was 2. 668 MPa, moisture absorption rate was 0. 81% when PEG8000 ： PEG600 ：TDI （molar ratio） was 1 ： 1 ： 2.28, TDI adding temperature was 60 - 70℃ and reaction time was 3 h. This adhesive had excellent water solubility and was suitable for paper bonding and waste paper recycling.
出处
《聚氨酯工业》
北大核心
2010年第2期40-42,共3页
Polyurethane Industry
关键词
聚氨酯热熔胶
水溶性
聚乙二醇
甲苯二异氰酸酯
polyurethane hot melt adhesive
water-soluble
polyethylene glycol
toluene diisocyanate
