| 摘要 |
PURPOSE:To provide the subject composition containing an epoxy (meth)acrylate oligomer, a urethane (meth)acrylate oligomer, an ethylenically unsaturated monomer and a photo-polymerization initiator, causing little deformation in molding and having excellent mechanical properties. CONSTITUTION:The objective composition is produced by compounding (A) an epoxy (meth)acrylate oligomer (preferably a diglycidyl ethertype epoxy resin produced by reacting bisphenol A with epichlorohydrin), (B) a urethane (meth)acrylate oligomer, (C) an ethylenically unsaturated monomer [preferably isobornyl (meth)acrylate, etc.] and (D) a photo-polymerization initiator (preferably benzyl methyl ketal, etc.). The amounts of the components A, B, C and D are preferably 10-40wt.%, 20-40wt.%, 30-50wt.% and 0.5-6wt.%, respectively. The component B is preferably produced by reacting usually a polyol compound such as polyether polyol with a diisocyanate compound and a compound containing (meth)acryloyl group. |
