Curable composition and hardcoated article employing same

摘要

A curable composition that is curable by polymerizing both a group capable of ring-opening polymerization and an ethylenically unsaturated group includes a cross-linkable polymer containing a repeating unit represented by the formula below, the group capable of ring-opening polymerization being present in a side chain of the polymer. A hardcoated article is formed by curing the curable composition. Its hardcoat layer has a pencil hardness of 4H to 9H. A hardcoated film is formed by coating on a plastic film the curable composition and curing it. The hardcoated film is used, for example, to laminate the front face of an image display device. In the formula, R1 denotes hydrogen or an alkyl group having 1 to 4 carbon atoms, P1 is a monovalent group containing a group capable of ring-opening polymerization, and L1 is a single bond or a divalent linking group.