N-乙烯基吡咯烷酮改性有机硅水性聚氨酯压敏胶的制备及其耐热粘结性能  

Preparation and Its Heat-resistant Adhesion Properties of N-vinylpyrrolidone Modified Photosensitive Silicone Waterborne Polyurethane Pressure-sensitive Adhesive

作　　者：李晓斌 任建荣[1,2,4] 史珺 杨立[6] LI Xiaobin;REN Jianrong;SHI Jun;YANG Li(Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 100049,China;CAS Engineering Laboratory for Special Fine Chemicals,Guangzhou 510650,China;CASH GCC Shaoguan Research Institute of Advanced Materials,Nanxiong 512440,China;CASH GCC(Nanxiong)Research Institute of Advanced Materials Co.,Ltd.,Nanxiong 512400,China;Nanxiong Science and Technology Development Service Center,Shaoguang 512499,China)

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]中国科学院大学,北京100049 [3]中国科学院新型特种精细化学品工程实验室,广东广州510650 [4]国科广化韶关新材料研究院,广东南雄512440 [5]国科广化(南雄)新材料研究院有限公司,广东南雄512440 [6]南雄市科学技术开发服务中心,广东韶关512499

出　　处：《广州化学》2023年第4期1-6,15,共7页Guangzhou Chemistry

基　　金：广东省科技专项资金项目(210906134536798)。

摘　　要：采用羟基封端的有机硅(HTPDMS)和季戊四醇三丙烯酸酯(PETA)等合成具有光敏性的有机硅水性聚氨酯预聚体,并通过N-乙烯基吡咯烷酮(NPV)和预聚体进行紫外光固化从而制备了一系列改性水性聚氨酯压敏胶。通过热重分析、持粘力、残胶量和流变等测试对压敏胶的耐热粘接和残胶量等性能进行了探究。结果表明:随着温度从30℃升高至80℃,有机硅基团的引入和NPV改性有利于水性聚氨酯压敏胶表现出更好的耐高温能力,相对于未改性水性聚氨酯压敏胶(W-0),NPV改性有机硅水性聚氨酯压敏胶(W-12)的80℃高温持粘时间相对于30℃持粘时间的下降幅度从53.5%大幅度缩小至5.5%。其80℃高温残胶量也由未改性前的23.4%降低至9.3%。研究结果表明,NPV改性及有机硅基团的引入能够显著提高水性聚氨酯压敏胶的持粘稳定性和耐热性,并有效降低压敏胶的高温流动性和高温残胶量。Hydroxyl-terminated silicones(HTPDMS)and pentaerythritol triacrylate(PETA)were used to synthesize photosensitive silicone waterborne polyurethane prepolymer and a series of modified waterborne polyurethane pressure-sensitive adhesives were prepared by UV curing with N-vinylpyrrolidone(NVPV)and the prepolymer.The heat-resistant adhesive properties and residue amount were investigated by TG,holding force test,residual adhesive test,rheology,etc.The data showed that as the temperature increased from 30℃to 80℃,the introduction of silicone groups and NPV modification facilitated the waterborne polyurethane pressure-sensitive adhesive to show better high-temperature resistance.Compared with unmodified waterborne polyurethane pressure-sensitive adhesive(W-0),NPV-modified organosilicon waterborne polyurethane pressure-sensitive adhesive(W-12)showed a significant decrease in the reduction of 80℃high-temperature tack time relative to 30℃tack time,from 53.5%to 5.5%.The amount of residual at 80℃was also reduced from 23.4%before modification to 9.3%.The results showed that NPV modification and the introduction of organosilicon groups can significantly improve the adhesion stability and heat resistance of waterborne polyurethane pressure-sensitive adhesives,and effectively reduce the high-temperature fluidity and high-temperature residual adhesive of pressure-sensitive adhesives.

关 键 词：压敏胶 水性聚氨酯 耐热 低残胶 紫外光固化 

分 类 号：TQ436.3[化学工程]