Patent ID: 8637633

Claim:
A polymerizable composition comprising a compound represented by General Formula (1): wherein, in General Formula 1, M represents a metal atom; X 1 and X 2 each independently represents a sulfur atom or an oxygen atom; R 1 represents a divalent organic group; m represents an integer of 0 or 1 or greater; p represents an integer of 1 to n; n represents a valence of a metal atom M; and Y's each independently represents an inorganic or organic residue where when n−p is 2 or greater, Y's may be bonded to each other to form a ring containing a metal atom M, a thiol compound and a bis(2,3-epithiopropyl)disulfide, wherein said thiol compound is at least one selected from the group consisting of 3-mercaptothietane, 4-mercaptomethyl-1, and 8-dimercapto-3,6-dithiatoctane, wherein the molar ratio of thiol groups in the polymerizable composition is 0.7 or more with respect to the amount of the episulfide groups.