申请人:Sakata INX Corporation
公开号:EP3421554A1
公开(公告)日:2019-01-02
An object of the present invention is to provide a photocurable inkjet printing ink composition offering excellent discharge stability, which also exhibits excellent curability, adhesion, and abrasion resistance and of which coating film has little tackiness, exhibits excellent stretchability, and does not crack in post-processing, even when the total light quantity of ultraviolet irradiation energy (especially ultraviolet light from an LED light source) is low (when the total light quantity is 100 mJ/cm2 or less, for example).
As a means for achieving the object, a photocurable inkjet printing ink composition, containing a photopolymerizable compound and a photopolymerization initiator, is provided wherein the photocurable inkjet printing ink composition is characterized in that 100 percent by mass of the photocurable inkjet printing ink composition includes: an acrylamide-based monomer by 5.0 to 50 percent by mass; a monofunctional monomer other than acrylamide-based monomer by 15 to 70 percent by mass; a polymerizable compound having two or more functionalities by 5.0 to 30.0 percent by mass; vinyl caprolactam by 0.1 to 15 percent by mass and/or an acrylated amine compound having two photopolymerizable functional groups and two amino groups in the molecule by 0 to 10 percent by mass; and the percentage of monofunctional monomers in the photopolymerizable compound is 60 to 99.5 percent by mass..
本发明的目的是提供一种光固化喷墨打印墨水组合物,该组合物具有优异的放电稳定性,同时还具有优异的固化性、附着力和耐磨性,即使在紫外线照射能量(特别是来自 LED 光源的紫外线)的总光量较低(例如,当总光量为 100 mJ/cm2 或更低时)时,其涂膜也具有较小的粘性,表现出优异的伸展性,并且在后处理中不会开裂。
作为实现上述目的的一种方法,提供了一种光固化喷墨打印墨水组合物,该组合物含有一种可光聚合的化合物和一种光聚合引发剂,其中,该光固化喷墨打印墨水组合物的特征在于,该光固化喷墨打印墨水组合物的质量百分数包括:一种丙烯酰胺基单体,质量百分数为 5.0%至 50%(质量百分比);除丙烯酰胺基单体以外的单官能团单体(15%至 70%(质量百分比));具有两个或两个以上官能团的可聚合化合物(5.0%至 30.0%(质量百分比));乙烯基己内酰胺(0.1%至 15%(质量百分比)和/或分子中具有两个可光聚合官能团和两个氨基的丙烯胺化合物(0%至 10%(质量百分比));以及单官能团单体在可光聚合化合物中的百分比为 60%至 99.5%(质量百分比)。