| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a polythiol compound for a high quality optical material that exhibits a good property in terms of hue, a composition for optical material, comprising the polythiol compound, and an optical material prepared from the composition for optical material.SOLUTION: The method for producing a polythiol compound for optical material is provided in which an epichlorohydrin compound having a total content of impurities composed of acrolein, allyl chloride, 1,2-dichloropropane, 2,3-dichloropropene, 2-methyl-2-pentanol, 2-chloro-allyl alcohol, cis-1,3-dichloropropene, trans-1,3-dichloro propene, 1,3-dichloro-isopropanol, 1,2,3-trichloropropane, and 2,3-dichloro-propanol of 0.5 wt.% or less, and 2-mercaptoethanol are reacted.SELECTED DRAWING: None |
