Patent ID: 10329373

Abstract:
Provided are a polyisocyanate monomer composition for optical members, from which an optical members with which turbidity and clouding are difficult to occur during the production thereof, and which is excellent in transparency, can be obtained, and an optical member and production methods therefor. A polyisocyanate monomer composition for optical members, including 4,4′-diphenylmethane diisocyanate and at least one kind selected from 2,4′-diphenylmethane diisocyanate and 2,2′-diphenylmethane diisocyanate; an optical member formed of a polymer having a structure represented by the following formula (1), and at least one kind of structure represented by the following formula (2) or (3); and a method for producing an optical member, including a step of polymerizing a monomer composition including a polyisocyanate compound including 4,4′-diphenylmethane diisocyanate and at least one kind selected from 2,4′-diphenylmethane diisocyanate and 2,2′-diphenylmethane diisocyanate, and at least one kind selected from a polythiol compound and a polyol compound.