| abstract |
An embodiment of the present invention relates to an isocyanate composition having improved stability and reactivity and a plastic optical lens using the same, wherein the isocyanate composition has a chlorine content of 22 to 500 ppm, which improves the stability of the composition. . Therefore, even if the isocyanate composition according to the embodiment is used after being stored for a long period of time after the preparation, it can be produced with a polythiourethane-based optical material excellent in physical properties such as refractive index, Abbe number, transparency, glass transition temperature, So that it is useful in the fields of spectacle lenses, camera lenses and the like. |