Method for producing internal release agent for polythiourethane optical material, internal release agent for polythiourethane optical material, and polymerizable composition containing the same

摘要

The method for producing an internal mold release agent for an optical material of the present invention includes (a) a phosphoric ester compound and (b) an alcohol compound composed of an aliphatic alcohol having 1 to 10 carbon atoms and / or an aromatic alcohol, When the total amount of these is 100% by weight, it comprises a step of heating a composition containing the alcohol compound (b) in an amount of 2.5% by weight or more in the range of 80 ° C. to 140 ° C. .