Patent ID: 7226710

Claim:
A photocurable and thermosetting resin composition, characterized by comprising (A) a photosensitive prepolymer having a carboxyl group in combination with at least two ethylenically unsaturated double bonds in its molecule, (B) a photo-radical polymerization initiator, (C) a diluent, (D) an oxetane compound having at least two oxetanyl groups in its molecule, and (E) a curing promotor, wherein said photosensitive prepolymer (A) is at least one prepolymer selected from the group consisting of: (1) a prepolymer obtained by the esterification of an epoxy group of a polyfunctional epoxy compound (a) having at least two epoxy groups in its molecule with a carboxyl group of an unsaturated monocarboxylic acid (b) and the subsequent reaction of a saturated or unsaturated polybasic acid anhydride (c) with a resultant hydroxyl group, (2) a prepolymer obtained by the reaction of (meth)acrylic acid with a copolymer composed of an alkyl (meth)acrylate and a glycidyl (meth)acrylate and the subsequent reaction of a saturated or unsaturated polybasic acid anhydride (c) with a resultant reaction product, (3) a prepolymer obtained by the reaction of (meth)acrylic acid with a copolymer composed of a hydroxyalkyl (meth)acrylate, an alkyl (meth)acrylate, and a glycidyl (meth)acrylate and the subsequent reaction of a saturated or unsaturated polybasic acid anhydride (c) with a resultant product, (4) a prepolymer obtained by the partial reaction of a glycidyl (meth)acrylate with a copolymer composed of an alkyl (meth)acrylate and (meth)acrylic acid, (5) a prepolymer obtained by causing a saturated or unsaturated polybasic acid anhydride (c) to react with a reaction product (I) of a polyfunctional epoxy compound (a) having at least two epoxy groups in its molecule, an unsaturated monocarboxylic acid (b), and a compound (d) having at least two hydroxyl groups and one other reactive group other than a hydroxyl group capable of reacting with an epoxy group in its molecule, (6) a prepolymer obtained by causing a hydroxyalkyl (meth)acrylate to react with a copolymer of an unsaturated polybasic acid anhydride with an aromatic hydrocarbon having a vinyl group, and (7) a prepolymer obtained by reacting said reaction product (I) with a saturated or unsaturated polybasic acid anhydride (c) and an unsaturated group-containing monoisocyanate (e).