含氮光引发剂对丙烯酸酯涂料光固化性能的影响  

Study on the Effects of N-containing Photoinitiator on the Light Curing Properties for Acrylate Coatings

作　　者：王珍 韩玉玺 王忠卫[1] 侯计金 于青[1] Wang Zhen;Han Yuxi;Wang Zhongwei;Hou Jijin;Yu Qing(College of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Qingdao OPERATE New Material Co􀆰􀆯Ltd􀆰􀆯Qingdao,Shandong 266590,China)

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266590 [2]青岛欧普瑞新材料有限公司,山东青岛266590

出　　处：《涂料工业》2023年第11期1-7,15,共8页Paint & Coatings Industry

基　　金：山东省自然科学基金(ZR2020LFG002,ZR2020QB023);青岛西海岸新区自主创新重大专项(2019-18);青岛富斯林化工科技有限公司研发基金(FSL-RF2019)。

摘　　要：为了实现丙烯酸酯类涂料的可见光固化,将一种新型酰基氧化膦类光引发剂4-二乙胺基苯甲酰基二苯基氧化膦(DEAPO)用于光固化涂料。研究了光源、引发剂用量、活性稀释剂种类对涂层凝胶含量、吸水性、耐酸碱性及机械性能的影响。结果表明:以DEAPO为光引发剂,分别在紫外光源(LED-385 nm)及可见光源(LED-420 nm)照射下引发丙烯酸酯类涂料的光固化,所得固化涂膜凝胶含量最高可达98%,且可见光源照射下光引发剂DEAPO最佳用量较低,仅为紫外光源下的1/2。与同类商业化光引发剂2,4,6-三甲基苯甲酰基-二苯基氧化膦(TPO)对比,以DEAPO为引发剂所得丙烯酸酯类涂层在马口铁上的机械性能优异,且耐酸碱优势更加显著。此外,DEAPO结构中含有叔胺基团,其作为助引发剂代替4-二甲氨基苯甲酸乙酯(EDAB)与2,4-二乙基硫杂蒽酮(DETX)配合所得涂层的机械性能与常用DETX/EDAB体系相当。这说明DEAPO还可以代替EDAB用于TypeⅡ光引发体系。In order to achieve visible light curing of acrylic coatings,a new type of acyl phosphine oxide photoinitiator 4-diethyl aminoben zoyldipheny lphosphine oxide(DEAPO)was used for light curing coatings.The effects of light source,photoinitiator dosage,and active diluent type on gel content,water absorption,acid and alkali resistance,and mechanical properties of the coatings were studied.As the results shown,with DEAPO as photoinitiator,acrylate coatings was cured under the irradiation of ultraviolet light source(LED-385 nm)and visible light source(LED-420 nm),respectively.The gel content in the cured coating was up to 98%,and the optimal amount of DEAPO under the visible light source was only 1/2 of the ultraviolet light source.It indicated that DEAPO could cooperate with visible light source at a lower dosage to accomplish the light-curing of acrylate coatings.This result was importance to reduce energy consumption and coating cost in the field of photocured coatings.Compared with the commercial photoinitiator TPO,excellent mechanical properties,and better acid and alkali resistance were obtained with DEAPO.In addition,DEAPO contains tertiary amine groups,which was used as co-initiators for DETX.The final coatings exhibit comparable mechanical properties with those of the common system(DETX/EDAB).This indicated that DEAPO could also replace EDAB for Type II photoinitiation system.

关 键 词：光固化 涂料 可见光 光引发剂 丙烯酸酯 

分 类 号：TQ637.83[化学工程—精细化工]