HARDENING COMPOSITION AND RESULTANT HARDENED MATERIAL

摘要

Provided is a hardening composition having a superior handling ability and capable of rendering a hardened material having superior properties in terms of transparency, thermal resistance, environment resistance, and formability. The hardening composition includes: (a) fine silica particles; (b) acrylate/methacrylate having at least two unsaturated ethylene groups but not having a ring structure; (c) acrylate/methacrylate having an unsaturated ethylene group, and having an alicyclic ring structure; and (d) a polymerization initiator, wherein the fine silica particles (a) have been subjected to the surface treatment with a silane compound (e) expressed by the following general formula (1) and a silane compound (f) expressed by the following general formula (2)