| abstract |
A method by which a high-refractive-index resin excellent in material properties including transparency, hue, heat resistance, and impact resistance is obtained. A polymerizable composition for the high-refractive-index resin is provided which comprises a polythiol compound having a dithioacetal, dithioketal, o-trithioformate, or o-tetrathiocarbonate skeleton and two or more mercapto groups and a compound having two or more iso(thio)cyanate groups, the molar ratio of the mercapto groups to the iso(thio)cyanate groups being from 1.0 to 3.0, excluding 1.0. Also provided are: a process for resin production which comprises curing the composition; a resin obtained by curing the composition; an optical element comprising the resin; and a lens comprising the optical element. |