| abstract |
(57) [Summary] [Structure] In the production of a sulfur-containing urethane plastic lens from a polyiso (thio) cyanate compound and a polythiol compound, the general formula (1) (Wherein, X or Y represents a hydrogen atom, a hydroxyl group or a mercapto group, m represents an integer of 1 to 2, and n represents an integer of 0 to 3), and the compound is represented by 1 to 3 as an active hydrogen compound. A method for producing a sulfur-containing urethane type plastic lens containing 6%. [Effects] The pot life can be sufficiently secured without using a special cooling device, and the urethane resin according to the present invention thus obtained is characterized by being colorless and transparent, having a high refractive index and low dispersion. Therefore, it is suitable as a material for optical elements such as eyeglass lenses and camera lenses, glazing materials, paints, and adhesives. |