异氰酸酯基硅烷改性湿固化聚氨酯热熔胶的研究  

Study on property of isocyanate silane modified wet-cured polyurethane hot melt adhesive

作　　者：张续 宋禹泉 姜志国[1] 张均[1] 陈建君[1] 姚明[1] Zhang Xu;Song Yuquan;Jiang Zhiguo;Zhang Jun;Chen Jianjun;Yao Ming(Beijing University of Chemical Technology,Beijing 100029)

机构地区：[1]北京化工大学,北京100029

出　　处：《化工新型材料》2021年第9期144-146,共3页New Chemical Materials

摘　　要：为改善湿固化聚氨酯热熔胶(PUR)的热稳定性及耐水性,减少湿固化过程中CO2气体的释放,提高其粘接性能,利用异氰酸酯基丙基三乙氧基硅烷(IPTS)改性PUR,得到硅烷封端改性PUR(SPUR)。结果表明,IPTS能够在不大幅增大SPUR黏度的情况下,有效地提高了粘接强度;随着硅烷封端率的增大,开放时间逐渐减小,剪切强度呈先升后降的趋势,并在硅烷封端率为20%时达到最大为13.54MPa,SPUR较未改性的PUR耐水性及耐热性有较明显提升。In order to improve the thermal stability and water resistance of wet-cured polyurethane hot melt adhesive(PUR),reduce the release of CO2 gas in the process of wet-curing and improve its bonding performance,the PUR was modified by 3-isocyanato-propyltriethoxysilane(IPTS).The results shown that IPTS can effectively improve the bonding strength without significantly increasing the viscosity of SPUR.With the increase of silane end-capping ratio,the opening time decreased gradually,and the shear strength increasing firstly and then decreasing.The maximum value of IPTS was 13.54 MPa when the silane end-capping ratio was 20%.SPUR had a significant improvement in water resistance and heat resistance compared to unmodified PUR.

关 键 词：硅烷封端改性聚氨酯热熔胶 封端率 开放时间 熔融黏度 剪切强度 耐水性 耐热性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]