| 摘要 |
PURPOSE:The titled composition containing a diacrylate of an epoxy resin, a photosensitive resin, a photopolymerizable (meth)acrylate and a photosensitizer as the essential component of a vehicle and providing a coating having excellent electrical insulating properties, heat resistance, etc. CONSTITUTION:A diacrylate (A) of an epoxy resin comprising bisphenol A- epichlorohydrin and having an average molecular weight of 1,000-4,000 a photosensitive resin (B) having at least two acryloyl groups via urethane bonds at its terminals and an average molecular weight of about 1,000-10,000 a monomer or oligomer (C) of an at least bifunctional photopolymerizable (meth)acrylate having no urethane bonds (e.g., ethylene glycol dimethacrylate), and the photosensitizer (D) (e.g., benzoin) are contained in a weight ratio of A to B of 95:5-10:90, in a weight ratio of (A+B) to C of 15:85-75:30 and in an amount of D of 0.3-8wt% to obtain the object ink composition. |
