| 摘要 |
<p>PURPOSE:To obtain the titled composition useful as printed circuit boards, having excellent adhesivity, heat resistance, water-vapor resistance (electrical insulating properties in water vapor absorption) and alkali developing properties, comprising a specific photo-curable polymer, a photopolymerization initiator, a reactive diluent and a solvent as main components. CONSTITUTION:The aimed composition comprising (A) a photo-curable polymer which is obtained by reacting (i) an epoxyvinyl ester polymer prepared by reaction between a cresol novolak epoxy polymer and an unsaturated monobasic acid with (ii) a polybasic acid anhydride and (iii) an alkyl ketene dimer and has <=10mgKOH/g hydroxyl number, (B) a photopolymerization initiator (e.g. benzoin), (C) a reactive diluent (e.g. 2-hydroxyacrylate) and (D) a solvent (e.g. methyl ethyl ketone) as main components.</p> |
