Polymerizable composition for optical material, optical material, and producing method thereof

A polymerizable composition for an optical material, consisting of:

• (A) a compound of which pKa value is 1 to 9;
• (B) a di- or higher functional iso(thio)cyanate compound;
• (C) a di- or higher functional active hydrogen compound;
• and
• at least one selected from the group consisting of a polyisocyanate-modified product (D), an internal mold release agent, a resin modifier, a photostabilizer, a bluing agent, an ultraviolet absorber, an anti-oxidant, a coloring inhibitor, and a pigment,
• wherein the compound (A) is at least one selected from 2-methylpyrazine, 2,6-lutidine, 3,5-lutidine, 3-chlorpyridine, and a compound represented by the following general formula (2) as a sole polymerization catalyst:
• wherein, in general formula (2), R2, R3, and R4 may be the same or different, and represent a pentyl group, a hexyl group, a heptyl group, a nonyl group, or a decyl group.