Patent ID: 8404757

Claim:
An active energy ray-curable sealing agent composition characterized as comprising: (A) an unsaturated group-containing urethane resin having a number average molecular weight in the range of 1,000 to 100,000 and a degree of unsaturation in the range of 0.1 to 1 mol/kg, which is obtained by the reaction of (a) a polycarbonate diol having a number average molecular weight in the range of 500 to 3,000, (b) a bifunctional epoxy acrylate or a bifunctional epoxy methacrylate, said epoxy acrylate and epoxy methacrylate having two hydroxyl groups and two ethylenically unsaturated groups in each molecule, and (c) a polyisocyanate; (B) tetrahydrofurfuryl (meth)acrylate; and (C) a photopolymerization initiator.