| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing a (poly)episulfide for an optical material in a method for producing a (poly)episulfide by reacting a (poly)epoxy compound with thiourea in which the content of calcium in the thiourea is≤0.1 wt.%. <P>SOLUTION: The method for producing a (poly)episulfide compound for an optical material is a method for producing a (poly)episulfide by reacting a (poly)epoxy compound with thiourea in which the content of calcium in the thiourea is≤0.1 wt.%. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
