ACTINIC RADIATION-CURABLE INKJET INK AND IMAGE FORMING METHOD USING SAME

摘要

Provided is an actinic radiation-curable inkjet ink that undergoes sol-gel phase transfer and contains a dye, a gelling agent, a photopolymerization compound and a photopolymerization initiator. The actinic radiation-curable inkjet ink comprises a photopolymerizable compound A, which is a (meth)acrylate having hydroxyl groups; a photopolymerizable compound B, which is a (meth)acrylate compound having a molecular weight within a range of 300 to 1,500 and an intramolecular structure (—CH2—CH2—O—)m (where m is an integer between 3 and 14); and a (meth)acrylate compound C, which has a molecular weight within a range of 280 to 1,500 and a ClogP value within a range of 4 to 7. The ink contains, in terms of the mass of the entire ink, 1 to 15 mass % of photopolymerizable compound A, 30 to 70 mass % of photopolymerizable compound B, 10 to 40 mass % of photopolymerizable compound C, and 2 to 10 mass % of gelling agent.

主权项

1. An actinic radiation-curable inkjet ink that undergoes temperature-induced reversible sol-gel phase transition, the actinic radiation-curable inkjet ink comprising a colorant, a gelling agent, a photopolymerizable compound, and a photopolymerization initiator, wherein
the photopolymerizable compound includes a photopolymerizable compound A, which is a (meth)acrylate compound having a hydroxyl group; a photopolymerizable compound B, which is a (meth)acrylate compound having a molecular weight in a range from 300 to 1,500 and having a structure represented by (—CH2—CH2—O—)m (where m is an integer of from 3 to 14) in a molecule; and a photopolymerizable compound C, which is a (meth)acrylate compound having a molecular weight in a range from 280 to 1,500 and having a ClogP value in a range from 4.0 to 7.0, the photopolymerizable compound A is contained in an amount in a range from 1 to 15 wt % relative to a total weight of the ink, the photopolymerizable compound B is contained in an amount in a range from 30 to 70 wt % relative to the total weight of the ink, the photopolymerizable compound C is contained in an amount in a range from 10 to 40 wt % relative to the total weight of the ink, and the gelling agent is contained in an amount in a range from 2 to 10 wt % relative to the total weight of the ink.