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PRODUCTION METHOD FOR EPISULFIDE COMPOUND FOR OPTICAL MATERIAL, EPISULFIDE-CONTAINING COMPOSITION, AND POLYMERIZABLE COMPOSITION INCLUDING EPISULFIDE-CONTAINING COMPOSITION AND FOR USE IN OPTICAL MATERIAL
PRODUCTION METHOD FOR EPISULFIDE COMPOUND FOR OPTICAL MATERIAL, EPISULFIDE-CONTAINING COMPOSITION, AND POLYMERIZABLE COMPOSITION INCLUDING EPISULFIDE-CONTAINING COMPOSITION AND FOR USE IN OPTICAL MATERIAL
A polymerizable composition for an optical material of the present invention includes polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2), an episulfide (b), and a polythiol (c).
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