Patent ID: 9656477
Date: 2017-05-23
CPC Classifications: B41J,C09D

Claim:
1. An ink composition for ultraviolet curable ink jets, comprising: monomer A represented by the following formula (I) CH2=CR1-COOR2—O—CH═CH—R3 (I) (in the formula, ‘R1’ represents a hydrogen atom or methyl group, ‘R2’ represents a divalent organic residue having a carbon number of 2 to 20, and ‘R3’ represents a hydrogen atom or a monovalent organic residue having a carbon number of 1 to 11), a photopolymerization initiator containing an acylphosphine oxide-based photopolymerization initiator and a thioxanthone-based photopolymerization initiator, and at least one monofunctional (meth)acrylate having an aromatic skeleton other than the monomer A; wherein: the content of the acylphosphine oxide-based photopolymerization initiator is 13% by mass or less with respect to the total mass of the ink composition and the thioxanthone-based photopolymerization initiator is 5% by mass or less with respect to the total mass of the ink composition.