Activation energy belt hardening die resin constituent, the production manner, formation hardening item null of activation energy belt hardening die

摘要

PURPOSE: To obtain an active-energy-ray-curable resin compsn. which exhibits a low cure shrinkage and can give a cured article having not only a good transparency but also a very high toughness. CONSTITUTION: This compsn. is characterized in that it contains a thermoplastic polyurethane elastomer, a monofunctional monomer which gives a homopolymer having a glass transition temperature of 50 deg.C or higher, and a urethane (meth) acrylate oligomer which is compatible with the polyurethane elastomer after curing. The comps. contains 100 pts.wt. mixture comprising the thermoplastic polyurethane elastomer, the monofunctional monomer, and the urethane (meth) acrylate oligomer, 0-20 pts.wt. photopolymn. initiator, 0-20 pts.wt. photosensitizer, 0-10 pts.wt. thermal curing component, 0-10 pts.wt. additives, and 0-60 pts.wt. colorant.