Composition for use as optical material
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKazuki Kariyazono, Takashi Aoki, Kouhei Takemura, Kikuo Furukawa
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Abstract
The purpose of the present invention is to appropriately control the rate of polymerization of a composition in which a thiol compound and an isocyanate compound are added to an episulfide compound and thereby provide an optical material which has high transparency. This composition for use as optical material comprises (a) an episulfide compound, (b) an isocyanate compound, (c) a thiol compound, and (d) a benzyl halide compound represented by formula (1): wherein: X is a halogen; L is selected from the group consisting of a hydrogen atom, a methyl group, a halogen, a mercaptomethyl group, and an isocyanate methyl group; and n is 1 or 2.
Claims7
A composition for optical materials, which comprises an episulfide compound (a), a thiol compound (b), an isocyanate compound (c), and a benzyl halide compound (d) represented by formula (1):
- wherein:
- X represents a halogen;
- L is selected from the group consisting of a hydrogen atom, a methyl group, a halogen, a mercaptomethyl group, and an isocyanate methyl group;
- when there are a plurality of Xs and a plurality of Ls, each of said Xs and Ls is selected independently;
- and n is 2;
- wherein the thiol compound (b) is selected from the group consisting of m-xylylenedithiol, p-xylylenedithiol, and o-xylylenedithiol, or
- the isocyanate compound (c) is selected from the group consisting of o-xylylene diisocyanate, m-xylylene diisocyanate, and p-xylylene diisocyanate.
Dependencies are inferred from the claim text.