| abstract |
The polymerizable composition for an optical material of the present invention has (A) an amine having two or more secondary amino groups, (B) an isocyanate having two or more isocyanato groups, and (C) three or more mercapto groups. A ratio (a / b) of the mole number a of the amino group of the amine (A) to the mole number b of the isocyanate group of the isocyanate (B) in a range of 0.10 to 0.60. is there. |