| 摘要 |
<p>Disclosed is a polymerization catalyst for polythiourethane optical material, which contains a sulfonate salt represented by the general formula (1) below. In the formula (1) below, R1, R2, R3 and R4 independently represent an alkyl group having 1-18 carbon atoms, or R1, R2, R3 and R4 may combine together to form a ring; R5 represents a hydrogen atom or an alkyl group having 1-18 carbon atoms; and X represents a nitrogen atom or a phosphorus atom.</p> |
