聚氨酯丙烯酸酯封端与解封特性及其UV-湿气双固化性能研究  

Blocking and unblocking characteristics of polyurethane acrylate and performance of UV-moisture dually curable adhesive

作　　者：刘海涛 陈辉 LIU Hai-tao;CHEN Hui(Guangzhou Mechanical Engineering Research Institute Co.,Ltd.,Guangzhou,Guangdong 510530,China;National Engineering and Research Center of Rubber and Plastic Sealing,Guangzhou,Guangdong 510530,China)

机构地区：[1]广州机械科学研究院有限公司,广东广州510530 [2]国家橡塑密封工程技术研究中心,广东广州510530

出　　处：《粘接》2019年第4期19-23,共5页Adhesion

基　　金：广州机械科学研究院有限公司新产品开发专项<新能源汽车动力电池组装用胶的研制>(编号18300030)

摘　　要：分别以丁酮肟和NaHSO_3作为封端剂预封端聚氨酯丙烯酸酯树脂(PUA),通过红外光谱表征其预封端结构。研究了预封端PUA的解封温度、解封时间及UV-湿气固化预封端PUA胶粘剂的性能。丁酮肟和NaHSO_3预封端PUA的最低解封温度分别为125℃和60℃。预封端的PUA可显著改善胶粘剂的贮存稳定性和减少固化过程中胶粘剂的发泡现象,但会降低胶层的耐水性和硬度。The polyurethane acrylate(PUA)was blocked with butanone oxime and NaHSO3,respectively.The structures of the obtained blocked PUAs were characterized by FT-IR.The unblocking temperature and unblocking time of the blocked PUAs and the properties of the UV-moisture dually curable adhesives were investigated.The lowest unblocking temperature of the blocked PUAs with butanone oxime and NaHSO3 as the blocking agents were 125℃and 60℃,respectively.The PUA adhesives stability was improved and the bubble phenomenon appeared during the curing process was reduced after being blocked.However,the hardness and the water-resistance of the blocked PUA adhesives were poorer than that of the unblocked ones.

关 键 词：UV-湿气双固化 亚硫酸氢钠 丁酮肟 封端反应 解封反应 

分 类 号：TQ433.436[化学工程]