| 摘要 |
<p>An optical material, comprising a resin composed of a polymer constituted of a first structural unit composed of at least one of the compounds represented by the formula (I), and of a second structural unit composed of at least one of the compounds represented by the formula (II), and having a weight-average molecular weight of from 1 x 10<3> to 5 x 10<6>: <CHEM> where R1 denotes an alkyl group having 1 to 18 carbons or a cycloalkyl group having 3 to 8 carbons; <CHEM> where R2 denotes hydrogen or an alkyl group having 1 to 8 carbons, and R3 and R4 denote respectively an alkyl group having 1 to 8 carbons. The optical material is superior in transparency, heat resistance, surface hardness, mechanical strength, and other properties.</p> |
