紫外光固化水性油墨及墨膜耐磨性能

doi:10.11944/j.issn.1000-0518.2020.04.190257

摘要/Abstract

摘要：

传统紫外光固化(UV)油墨具有粘度低、固化速度快、应用范围广等优点。但存在使用少量有机溶剂、交联程度低等缺陷。本文通过自由基聚合制备的苯乙烯丙烯酸共聚物与甲基丙烯酸羟乙酯(HEMA)反应制备水性预聚物。通过甲基丙烯酸缩水甘油酯(GMA)和乙二胺反应制备了含有四丙烯酸官能团的活性稀释剂。最后,通过水性预聚物、活性稀释剂、光引发剂以及少量溶剂制备了UV光固化水性油墨。探讨了光引发剂的种类和质量分数、预聚物的相对分子质量和质量分数、活性稀释剂的结构和质量分数对UV油墨的光固化速度以及耐磨度的影响。当预聚物的数均相对分子质量为1.98×10⁵且质量分数为30%、光引发剂质量分数为4%、活性稀释剂的官能团数目为4且质量分数为40%的UV水性油墨的光固化速率为1 s,经50次磨损质量损失为9%。该方法所制得的UV水性油墨可用于柔版印刷、凹印、数字印刷等。

关键词: 紫外光固化水性油墨, 预聚物, 光固化, 活性稀释剂

Abstract:

Traditional ultraviolet (UV) inks have the advantages of low viscosity, fast curing speed, and wide application range. However, there are disadvantages such as use of organic solvents and low degree of crosslinking. In this paper, styrene and acrylic acid are copolymerized by free radical polymerization to form aqueous prepolymer. Secondly, a tetraacrylate functional reactive diluent is prepared from glycidyl methacrylate (GMA) and ethylenediamine. Finally, a UV-curable aqueous ink is prepared using an aqueous prepolymer, a reactive diluent, a photoinitiator, and a small amount of solvent. The effects of the type and mass fraction of the photoinitiator, the relative molecular mass and mass fraction of the prepolymer, the structure and mass fraction of the reactive diluent on the photocuring speed and wear resistance of the UV ink are investigated. When the prepolymer has a relative molecular mass of 1.98×10⁵ and a mass fraction of 30%, a photoinitiator mass fraction of 4%, a reactive diluent functional group number of 4, and a mass fraction of 40%, the photocuring rate of the UV aqueous ink is 1 s. After 50 times the wear quality loss is 9%. The UV aqueous ink prepared by the method can be used for flexographic printing, gravure printing, and digital printing.

Key words: ultrabiolet water-based ink, prepolymer, photocuring, reactive diluent

侯成敏,张伟,夏卫民,张治发,寇艳萍. 紫外光固化水性油墨及墨膜耐磨性能[J]. 应用化学, 2020, 37(4): 464-470.

HOU Chengmin,ZHANG Wei,XIA Weimin,ZHANG Zhifa,KOU Yanping. Wear Resistance of Ultraviolet Curing Water-Based Ink and Ink Film[J]. Chinese Journal of Applied Chemistry, 2020, 37(4): 464-470.

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