Patent ID: 6187844
Filing Date: 2001-02-13
Classification: C08G,C08K

Abstract:
A plastic lens which is formed using a composition for plastic lens, the composition comprising, as its main components,:resin material having urethane-based resin component including a mercapto group containing compound and an isocyanate group containing compound, said mercapto group containing compound including pentaerythritoltetrakis (3-mercaptopropionate) and 4-mercaptomethyl-3, 6-dithio-1, 8-octanedithiol, and said isocyanate group containing compound including 2, 5 (2, 6)-bicyclo [2,2,1] heptanebis-(isocyanatemethyl) norbornanediisocyanatemethyl; andUV absorbent comprising at least one of 2-(5-methyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-butyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-octyl-2-hydroxyphenyl) benzotriazole, 2-(3, di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3, 5-di-t-amyl-2-hydroxyphenyl) benzotriazole and 2-(3, 5-di-t-butyl-2-hydroxyphenyl) benzotriazole.