Patent ID: 7091307

Claim:
A composition for optical materials, comprising: (a) a compound having in one molecule at least one structure represented by the following Formula 1: wherein R 1 is a single bond or a C 1-10 hydrocarbon group, each of R 2 , R 3 and R 4 is a C 1-10 hydrocarbon group or hydrogen, Y is O, S, Se or Te, m is 1 to 5, and n is 0 to 5; (b) a compound having in one molecule at least one isocyanate group and/or isothiocyanate group; (c) a compound having in one molecule at least one mercapto group; and (d) an inorganic compound having sulfur atom and/or selenium atom, wherein the compound (d) is sulfur, carbon disulfide, selenium, lead selenide or selenium sulfide.