Resin composition for optical material and optical material using the same
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsHiroshi Horikoshi, Motoharu Takeuchi
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Abstract
According to the present invention, a resin compound for optical material, comprising (a) an episulfide compound represented by a specific structural formula, (b) a xylylenedithiol compound and (c) a xylylenediisocyanate compound can be provided. In a preferable embodiment of the present invention, a resin compound for optical material having superb optical properties, a high density and a high thermal resistance can be provided. Also according to the present invention, an optical material obtained by curing the above-described resin compound can be provided.
Claims10
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.
An optical material obtained by curing the resin compound in any one of the proceeding claims.
Dependencies are inferred from the claim text.