Licht- und wärmehärtbare Zusammensetzung, die mit einer wässerigen Alkalilösung entwickelbar ist

摘要

A photocurable and thermosetting resin composition developable with an aqueous alkali solution comprises in combination: (A) a photosensitive prepolymer soluble in a dilute aqueous alkali solution obtained by esterifying an epoxy resin represented by the general formula (1) with (meth)acrylic acid and further adding an acid anhydride thereto until the acid value reaches a level of 60 to 120 mg KOH/g, (B) a diglycidyl ether type epoxy compound containing two epoxy groups, (C) a photopolymerization initiator, and (D) a diluent in such ratios that said epoxy compound (B) accounts for 5 to 120 parts by weight and said photopolymerization initiator (C) for 0.1 to 30 parts by weight, based on 100 parts by weight of said photosensitive prepolymer (A). wherein X represents CH 2 , C(CH 3 ) 2 , or SO 2 , n has an average value in the range of 1 to 12, and Y represents a hydrogen atom or a glycidyl group, providing that Y is a glycidyl group where n is 1 and at least one of the plurality of Y's is a glycidyl group where n is 2 or more.