URETHANE-BASED OLIGOMER AND ACTIVE ENERGY RAY-CURABLE URETHANE-BASED RESIN COMPOSITION CONTAINING THE SAME OLIGOMER AS CURING COMPONENT

摘要

PURPOSE: To obtain the subject oligomer, having a specific molecular structure, composed of an active hydrogen-containing (meth)acrylate-based monomer unit, a polyisocyanate unit and a low- and a high-molecular weight polyols and excellent in tensile strength, elongation, etc. ;CONSTITUTION: This oligomer contains (A) an active hydrogen-containing (meth) acrylate-based monomer unit [e.g. 2-hydroxyethyl (meth)acrylatel, (B) a polyisocyanate unit (e.g. 2,4-or 2,6-tolylene diisocyanate), (C) a low-molecular weight polyol having ≤300 molecular weight (e.g. ethylene glycol) and (D) a high-molecular weight polyol having ≥500 molecular weight (e.g. a polyethereal polyol) as components and has a molecular structure expressed by the formula [= is component (A); circle is component (B), (-) is component (C) and (...) is component (D)]. Furthermore, the oligomer can be contained as a curing component to afford this active energy ray-curable type urethane-based resin composition.;COPYRIGHT: (C)1995,JPO