abstract |
The polymerizable composition for an optical material of the present invention comprises a polyisocyanate (a) comprising an aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2) and a polythiol (b) having a bifunctional or higher thiol group , And the modifier (a2) is contained in an amount of not more than 60% by weight in the polyisocyanate (a). |