| 摘要 |
A plastic lens is formed using a plastic lens composition which contains, as its main components, a resin material having a urethane-based resin, and at least one kind of UV absorbent selected from the group comprising 2-(5-methyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-butyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-octyl-2-hydroxyphenyl) benzotriazole, 2-(3, 5-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. The total amount of addition of the UV absorbants is preferably in the range of 0.02 to 2.0 wt % relative to 100 wt % of the resin material.
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