| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a printing ink photocurable composition having excellent fast-curability, depth-curability, and adhesion even in the composition system added with a colorant. SOLUTION: This printing ink photocurable composition comprises (A) crosslinked fine particles having an average primary particle diameter of 10-1,00 nm to be obtained by polymerizing (a) a compound having one or two radically polymerizable ethylenically unsaturated bonds in the molecule and (b) a compound having three or more (meth)acryloyl groups in the molecule and (B) a compound having at least one (meth)acryloly group in the molecule. Since the composition excels in fast-curability, it is unnecessary to increase the amount of a photopolymerization initiator to be added, and accordingly, the depth- curability becomes good and, as a result, the adhesion to a substrate is improved.</p> |
