ADHESIVE COMPOSITION

摘要

Provided is a photocurable adhesive resin composition with which high adhesion to various adherends including as metal oxides, metals, and resins is ensured and which, after curing, has a high glass transition temperature and excellent long-term resistance to electrolytic corrosion. The composition comprises: a bifunctional urethane (meth)acrylate oligomer which contains urethane prepolymer moieties formed from a polyol having an alkylene oxide chain and from a polyisocyanate and in which the number of repeated urethane prepolymer moieties is 10-30 and the number of repeated alkylene oxide chains is 10-20; a hydrophilic monomer ingredient; and a hydrophobic monomer ingredient. The amount of the hydrophilic monomer ingredient is 50 parts by mass or less. The composition has a chlorine concentration less than 1,000 ppm and an acid value less than 10 mg-KOH/g.