| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a plastic spectacle lens which is hardly tinted though the lens nearly thoroughly absorbs long-wavelength ultraviolet rays. SOLUTION: In the method for producing the plastic spectacle lens, a polymerization catalyst comprising a peroxide is added to a lens monomer based on diethylene glycol bisallyl carbonate, the monomer is cast and polymerized at -20 to -150°C, and the resulting lens is immersed in a solution containing one or more ultraviolet absorbers selected from 4-tert-butyl-4'-methoxybenzoylmethane, dibenzoylmethane, 2-(2,4-dihydroxyphenyl)-2H-benzotriazole, 5-chloro-2-(2,4-dihydroxyphenyl)-2H-benzotriazole, 2,2',4,4'-tetrahydroxybenzophenone and 2,2'-dihydroxy-4-methoxybenzophenone at 100-130°C under high pressure. COPYRIGHT: (C)2006,JPO&NCIPI |
