高频固化型单组分PVAc-TDI复合胶粘剂的制备  

Preparation of high-frequency curable single-component PVAc-TDI composite adhesive

作　　者：白龙[1] 李志国[1] 邬洪川 张铭璐 李双[1] 顾继友[1] 

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《中国胶粘剂》2014年第2期1-4,10,共5页China Adhesives

基　　金：国家自然基金项目(31000270);黑龙江省青年基金项目(QC2011C010);中国博士后基金项目(20100480959;201104406;LBH-10275)

摘　　要：以封闭TDI(甲苯二异氰酸酯)胶束和PVAc(聚醋酸乙烯酯)乳液作为主要原料,采用机械共混法制备了单组分PVAc-TDI复合胶粘剂;然后,以此作为木材胶接件用胶粘剂,采用高频加热技术对TDI胶束进行解封闭,可实现单组分复合胶粘剂的交联固化。研究结果表明:以复合胶粘剂的稳定性、胶接强度和耐水性等作为考核指标,采用单因素试验法优选出制备该胶粘剂的最佳工艺条件是m(封闭TDI胶束)∶m(PVAc乳液)=5∶100、高频加热时间为40 s;此时,复合胶粘剂的胶接强度升至6.68 MPa、耐水时间延长至116 min。With closed TDI （ toluene diisocyanate） micelle and PVAe （ polyvinyl acetate） emulsion as main raw materials, a single-componeut PVAc-TDI composite adhesive was prepared by mechanical blending method. Then, with the composite adhesive as adhesive for wood glued joint, the crosslinking curing of single-compnnent composite adhesive could be realized after the TDI micelle was unclosed hy high-frequency heating technology. The research results showed that： with stability, bonding strength and water resistance of composite adhesive as evaluation indexes, the optimal process conditions of preparing adhesive were preferred by single-factor experiment method when mass ratio of m （closed TDI micelle） ： m （PVAc emulsion） was 5： 100, and the high- frequency heating time was 40 s. Here, the bonding strength of composite adhesive was increased to 6.68 MPa, and water resistance time of composite adhesive was prolonged to 116 min.

关 键 词：异氰酸酯 水性 单组分 胶粘剂 高频固化 

分 类 号：TQ433.433[化学工程]