abstract |
Polymerizable composition comprising a thioepoxy compound for an optical material containing 4 to 15% by weight of either or both 2,3-epoxypropyl (2,3-epithiopropyl) sulfide and 2,3-epoxypropyl (2-disulfide) , 3-epithiopropyl), represented by the formula 1: 5 ** Formula ** in which the compounds of formula 1 are formed as intermediates in the preparation of the thioepoxy compound. |