| 摘要 |
<p>A plastic lens which absorbs ultraviolet light having wavelength of about 40 0 nm and suppresses coloring and a process for producing the lens. A plastic lens may be made from a composition which comprises (A) a lens material monomer comprisi ng diethylene glycol bisallylcarbonate , (B) an organic peroxide-based polymerization initiator, (C) a cobalt compound represented by at least one of CoO-Al2O3 an d Co-Al2O4, and (D) at least one ultraviolet light absorbent selected from 2-hydroxy-4- octyloxy-benzophenone, 2,2',4,4'-tetrahydroxy-4-octyloxybenzophenone and 2,2',4'- trihydroxy-4- octyloxybenzophenone. A process for producing a plastic lens comprises mixing component (A), component (B), a cobalt fluid comprising component (C) in a dispersant and component (D) an d a step of casting the mixed fluid into a mold and polymerizing the fluid to obtain a plastic lens.</p> |
