Patent ID: 7009031

Claim:
A composition for optical materials comprising at least one compound represented by the following Formula 1: wherein R 1 , R 2 and R 3 are each independently C 1 –C 10 hydrocarbyl or hydrogen; X 1 , X 2 and X 3 are each independently S, Se or Te; Y 1 , Y 2 and Y 3 are each independently —S a —[(CH 2 ) b S] c H, a is an integer from 0 to 2, b is an integer from 0 to 4, and c is an integer from 0 to 2, and a compound reactive to the compound of Formula 1, wherein the compound reactive to the compound of Formula 1 is a sulfur-containing organic compound, an isocyanate compound, an isothiocyanate compound, an epoxy compound or a vinyl compound, and wherein the sulfur-containing organic compound has, in one molecule, at least one group represented by the following Formula 2: wherein R 4 is C 1 –C 10 hydrocarbyl; R 5, R 6 and R 7 are each independently C 1 –C 10 hydrocarbyl or hydrogen; Y is O, S, Se or Te; m is an integer from 1 to 5; n is an integer from 0 to 5; and p is 0 or 1.