| abstract |
PROBLEM TO BE SOLVED: To suppress white turbidity of a (thio) epoxy cured resin having excellent optical properties and a very high refractive index. SOLUTION: The following formula (1) is contained in one molecule. (Wherein, R 1 , R 2 , and R 3 each represent a hydrocarbon group having 1 to 10 carbon atoms or a hydrogen atom, and X represents an oxygen atom or a sulfur atom). A method for preparing a polymerizable composition containing a thio) epoxy compound and curing the polymerizable composition to obtain a cured resin, Before the preparation of the polymerizable composition, a purification step of washing the (thio) epoxy compound with a polar organic solvent selected from alcohols, ethers, ketones and esters is provided. |