Polymerizable composition, process for producing organic glass using the composition, and organic glass

A polymerizable composition comprising:

• a compound (A) including two or more allyloxycarbonyl groups represented by Formula (1);
• a polymerization initiator (B) which is at least one kind selected from the group consisting of a peroxyketal-based radical polymerization initiator, a peroxy monocarbonate-based radical polymerization initiator, and a peroxyester-based radical polymerization initiator;
• and
• a photochromic compound (C) which is at least one kind selected from a naphthopyran compound group,
• wherein, in the formula, n is an integer of 2 to 6, R1 represents a hydrogen atom or a methyl group, and a plurality of R1's existing together may be identical to or different from each other, and
• X is a divalent to hexavalent organic group a derived from a linear or branched aliphatic polyol having 3 to 12 carbon atoms which optionally have an oxygen atom, a divalent to hexavalent organic group b derived from a cyclic aliphatic polyol having 5 to 16 carbon atoms which optionally have an oxygen atom, or a divalent to hexavalent organic group c derived from an aromatic compound having 6 to 12 carbon atoms, and the organic group a or the organic group b is bonded to an allyloxycarbonyl group via an ether group derived from a hydroxyl group included in these organic groups, so as to form an allyl carbonate group.