FLAME-RETARDANT ACTIVE-ENERGY-RAY-CURABLE RESIN, FLAME- RETARDANT ACTIVE-ENERGY-RAY-CURABLE RESIN COMPOSITION, PRINTED CIRCUIT BOARD, AND MULTILAYRED PRINTED CIRCUIT BOARD

摘要

PROBLEM TO BE SOLVED: To provide a nonhalogenous flame-retardant resin used, e.g. for an interlayer insulation layer of a multilayered printed circuit board; a flame- retardant resin composition containing the same; and a multilayered printed circuit board having a cured film formed from the composition. SOLUTION: This flame-retardant active-energy-ray-curable resin is prepared by reacting a novolak epoxy resin having a triazine structure with a free- radically polymerizable unsaturated monocarboxylic acid and reacting hydroxyl groups of the resulting product with a polybasic acid and/or its anhydride. The flame-retardant active-energy-ray-curable resin composition contains the resin, a reactive diluent, a photopolymerization initiator, and a thermosetting compound or further contains an inorganic hydrate. A printed circuit board and a multilayered printed circuit board, both having a cured film prepared from the composition, are provided.