催化剂对复合薄膜用水性聚氨酯胶粘剂性能的影响  

Effect of catalyst on performance of waterborne polyurethane adhesives applied in laminated films

作　　者：张婷婷[1] 项尚林[1] 丁骋[1] 黄健[1] 陈贤益[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《中国胶粘剂》2008年第5期5-8,共4页China Adhesives

摘　　要：采用丙酮法制备了复合薄膜用的水性聚氨酯(WPU)乳液胶粘剂,研究了催化剂用量对WPU反应速率及其性能的影响。研究结果表明,适量的催化剂能明显加快聚氨酯(PU)预聚体的反应速率;当催化剂质量分数为0.1%时,WPU乳液的粘度和复合薄膜的T型剥离强度最大,但WPU胶膜的玻璃化转变温度(Tg)降低,由未加催化剂时的-25.5℃降低到-29.1℃。A series of emulsion for waterborne polyurethane （WPU） adhesive applied in laminated films were synthesized by acetone process, and the effect of catalyst dosage on the reaction speed and properties of WPU were studied. The results showed that adequate catalyst can obviously raise the reaction speed of polyurethane （PU） prepolymer. When mass fraction of catalyst was 0.1%, the viscosity of WPU emulsions and T-peel strength of laminated films was best, but the Tg of the WPU film is reduced to -29.1 ℃ from -25.5 ℃ without catalyst.

关 键 词：水 性聚氨酯 乳液 胶粘剂 催化剂 复合薄膜 

分 类 号：TQ314.242[化学工程—高聚物工业] TQ433.432