| 摘要 |
<p>PURPOSE:To provide the printing ink composition containing a urethane (meth) acrylate, a vinyl ether compound, a cationic photopolymerization initiator and a radical photopolymerization initiator, suitable for ultraviolet curing type screen printing and excellent in stability, curing speed and adhesion. CONSTITUTION:This printing ink composition contains (A) preferably 20 to 70wt.% urethane (meth)acrylate synthesized by reacting a polyol compound, an organic polyisocyanate and a hydroxyl group-containing (meth)acrylic acid ester, (B) preferably 10 to 50wt.% vinyl ether compound (e.g. diethylene glycol divinyl ether), (C) preferably 1 to 5wt.% cationic photopolymerization initiator {e.g. bis[4-(di[4-(2-hydroxyethyl)phenyl]sulfonio)-phenyl]sulfide bis- hexafluorophosphate} and (D) preferably 3 to 10wt.% radical photopolymerization initiator (e.g. 1-hydroxycyclohexyl phenyl ketone).</p> |
