A UV curable inkjet ink including a free radical polymerizable compound and an acyl phosphine oxide initiator wherein the acyl phosphine oxide initiator includes an acyl group selected from the group consisting of a benzoyl group substituted by an urea group or an oxalylamide group; a 2,6-dimethyl benzoyl group substituted in position 3 by an urea group or an oxalylamide group; a 2,6-dimethoxy benzoyl group substituted in position 3 by an urea group or an oxalylamide group; a 2,4,6-trimethyl benzoyl group substituted in position 3 by an urea group or an oxalylamide group; and a 2,4,6-trimethoxybenzoyl group substituted in position 3 by an urea group or an oxalylamide group wherein the urea group and the oxalylamide group include a tertiary amine group positioning a phosporus atom of the acylphosphine oxide initiator in a 1 to Z position, where position 1 is defined as that of the phosphorus atom and position Z is defined as the nitrogen atom of the tertiary amine group with Z representing an integer of at least 11; and that the acyl phosphine oxide initiator contains no more than two photoinitiating moieties having a phosphine oxide group.
一种紫外光固化喷墨墨
水,包括自由基聚合化合物和酰基膦氧化物
引发剂,其中酰基膦氧化物
引发剂包括以下酰基:被
尿素基或草酰胺基取代的苯甲酰基;在3位被
尿素基或草酰胺基取代的2,6-二甲基苯甲酰基;在3位被
尿素基或草酰胺基取代的2,6-二
甲氧基苯甲酰基;在3位被
尿素基或草酰胺基取代的2,4,6-三甲基苯甲酰基;在3位被
尿素基或草酰胺基取代的2,4,6-三
甲氧基苯甲酰基,其中
尿素基和草酰胺基包括将膦氧化物
引发剂的
磷原子定位于1到Z位置的三级胺基,其中位置1被定义为
磷原子的位置,位置Z被定义为三级胺基的氮原子,其中Z表示至少为11的整数;而且酰基膦氧化物
引发剂不含有超过两个具有膦氧化物基团的光引发基团。