Patent ID: 8575293
Filing Date: 2013-11-05
Classification: C08G,G02B

Abstract:
1. A resin compound for optical material, comprising (a) an episulfide compound represented by the following general formula (1), (b) a xylylenedithiol compound, (c) a xylylenediisocyanate compound: (in the formula, m represents an integer of 0 through 4, and n represents an integer of 0 through 2); and (d) a compound having both an ester group and a mercapto group, wherein a molar ratio of an SH group in the (d) compound having both an ester group and a mercapto group to an SH group in the (b) xylylenedithiol compound is greater than 0.1 and less than 1.2; and the (d) compound is at least one compound selected from the group consisting of (i) trimethylolpropanetristhio glycolate, (ii) pentaerythritoltetrakisthio glycolate, (iii) trimethylolpropanetristhio propionate and (iv) pentaerythritoltetrakishio propionate and wherein the resin compound for optical material has a refractive index of from 1.66 to 1.72.