Patent ID: 7503649
Filing Date: 2009-03-17
Classification: C09D

Abstract:
1. An active energy ray curable aqueous ink composition comprising at least water, a polymerizable substance which undergoes radical polymerization by an active energy ray, and a polymerization initiator which generates radicals by an active energy ray, wherein the polymerizable substance is a water-soluble (meth)acrylate compound represented by the following general formula (1): wherein Z represents a residue of a polyol or an epoxy ester of a polyol having (x1+y1) hydroxyl groups, x1 represents an integer of 0 to 2, y1 represents an integer of 2 to 6, and x1+y1 represents an integer of 2 to 6, R 1 each independently represent a hydrogen atom or a methyl group, and R 2 each independently represent an atomic group A represented by the following formula: wherein R 3 each independently represent a hydrogen atom or a methyl group, m1 represents an integer of 1 to 5, and n1 represents 0 or 1, wherein the content of the water is 40 to 90% by mass with respect to the total amount of the aqueous ink composition, and wherein the polymerization initiator is either one of the following compounds: