有机硅丙烯酸酯预聚体的合成及其在UV固化丙烯酸酯压敏胶中的应用  

Synthesis of organosilicone acrylate prepolymer and its application in UV curing acrylate pressure sensitive adhesive

作　　者：陈柯宇 林晓丹[1] 王磊[1] 廖平湘 Chen Keyu;Lin Xiaodan;Wang Lei;Liao Pingxiang(School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,Guangdong,China;Hunan Hexiangrun New Materials Co.,Ltd.,Yongzhou 266400,Hunan,China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510641 [2]湖南省和祥润新材料有限公司,湖南永州266400

出　　处：《中国胶粘剂》2024年第3期23-30,共8页China Adhesives

摘　　要：利用单端羟基硅油、异佛尔酮二异氰酸酯、丙烯酸羟乙酯制备了含有氨基甲酸酯基的有机硅丙烯酸酯预聚体。以此预聚体作为硬单体,丙烯酸异辛酯为软单体,低生物毒性2,4,6-三甲基苯甲酰基苯基膦酸乙酯(TPO-L)为光引发剂,采用紫外光(UV)固化聚合制备了吸水性、透水气性、耐水性和粘接性能优异的丙烯酸酯压敏胶。通过二正丁胺反滴定法探究了预聚体合成最佳温度、时间、催化剂用量等工艺参数。研究了光照时间、光引发剂种类及用量对压敏胶固化程度的影响,以及预聚体含量对压敏胶粘接性能、吸水性和湿气透过性的影响。研究结果表明:在有机硅丙烯酸酯预聚体合成中,第一步反应温度为40℃,第二步反应温度为50℃,反应时间都为60 min,催化剂最佳用量为0.10%(质量分数);在改性压敏胶制备中,光照120 s,光引发剂TPO-L用量为3%(质量分数),预聚体含量为20%时制备的压敏胶光固化程度较高,初粘力为21号球,180°剥离强度为5.7 N/(25 mm),持粘力超过360 h,对非极性表面PP板180°剥离强度为3.2 N/(25 mm);改性后的压敏胶吸水性、湿气透过性良好。Organosilicone acrylate prepolymer containing urethane groups were prepared by using singleterminated hydroxysilicone oil,isophorone diisocyanate and hydroxyethyl acrylate.Using this prepolymer as a hard monomer,2-ethylhexyl acrylate as a soft monomer,and low biotoxicity 2,4,6-trimethylbenzoylphenylphosphonate ethyl ester(TPO-L)as a photoinitiator,acrylate pressure sensitive adhesive with excellent water absorption,water permeability,water resistance,and bonding properties was prepared by UV curing polymerization.The optimal process parameters for the synthesis of prepolymer,such as temperature,time,and catalyst dosage,were investigated by using the reverse titration method with dibutylamine.The effects of illumination time,types and amounts of photoinitiators on the curing degree of pressure sensitive adhesive,as well as the effects of prepolymer content on the bonding performance,water absorption,and moisture permeability of pressure sensitive adhesive were studied.The research results showed that in the synthesis of organosilicone acrylate prepolymer,the first step reaction temperature was 40℃,the second step reaction temperature was 50℃,both the reaction time was 60 minutes,and the optimal catalyst dosage was 0.10%(mass fraction).In the preparation of modified pressure sensitive adhesive,when the illumination time was 120 s,the photoinitiator TPO-L dosage was 3%(mass fraction),the prepolymer content was 20%,the photocuring degree of pressure sensitive adhesive was relatively high,the initial adhesion force was 21#ball,the 180°peel strength was 5.7 N/(25 mm),the holding power exceeded 360 h,and the 180°peel strength for non-polar surface of PP board was 3.2 N/(25 mm).The modified pressure sensitive adhesive had good water absorption and moisture permeability.

关 键 词：羟基硅油 异佛尔酮二异氰酸酯 丙烯酸羟乙酯 预聚体 UV固化 压敏胶 

分 类 号：TQ433[化学工程]