| abstract |
A composition for optical materials which comprises a compound having per molecule at least one structure represented by the following formula (1): (1) (wherein R1, R2, R3, R4, X, Y, and n have the same meanings as in the description), an amine compound, and an isocyanate compound. The composition, through polymerization and curing, gives a resin which is useful as an optical material having a well balanced combination of properties including high impact resistance, a high refractive index, and a sufficiently high Abbe's number. |