| 摘要 |
<p>The present invention provides a method for producing plastic lenses, especially for spectacles, comprising dipping poly(thio)urethane lenses or lenses of a diethylene glycol bisallylcarbonate-type polymer in a solution comprising at least one compound selected from dibenzoylmethane compounds of the general formula (1) <CHEM> wherein R and R' each represent a linear or branched C1-8-alkyl group, or a linear or branched C1-8-alkoxyl group; and n and n' independently are 0 or an integer of 1-3; and benzotriazole compounds of the general formula (2) <CHEM> wherein R'' represents a hydrogen atom, a chlorine atom or a bromine atom; and m and m' each indicate 1 or 2, which yields plastic lenses which absorb almost all UV-radiation of up to about 400 nm and have a reduced yellow coloring.</p> |
