RESIN CURABLE WITH ACTINIC ENERGY RAY, PHOTOCURABLE/THERMOSETTING RESIN COMPOSITION CONTAINING THE SAME, AND CURED ARTICLE OBTAINED THEREFROM

摘要

A resin curable with actinic energy rays which is obtained by: causing a linear epoxy resin (A') which is a product of the polyaddition reaction of a bifunctional epoxy compound of the hydrogenated bisphenol type (a) with a dicarboxylic acid (b) to add an epihalohydrin (c) at hydroxyl groups of the resin (A') to obtain a polynuclear epoxy resin (A") having epoxy groups at the ends and in side chains; reacting epoxy groups of the polynuclear epoxy resin (A") with an unsaturated monocarboxylic acid (d) to incorporate photopolymerizable unsaturated groups; and further reacting hydroxyl groups of the resin (A') with a polybasic acid anhydride (e) to incorporate carboxyl groups. Mixing this actinic-energy-ray-curable resin with a photopolymerization initiator, a diluent, and a polyfunctional epoxy compound gives a photocurable/thermosetting resin composition developable with aqueous alkali solutions. The photocurable/thermosetting resin composition is useful in applications such as a solder resist for printed wiring boards and an interlayer dielectric for multilayered printed wiring boards.