| 摘要 |
PURPOSE:To obtain a lens having high refractive index and higher impact strength by using a radically polymerizable polyfunctional monomer such as divinyl benzene as the vinyl monomer. CONSTITUTION:The lens comprises a copolymer of a monomer mixture consisting of 50-90wt%, pref. 60-70wt% component A and 10-50wt%, pref. 30- 40wt% component B, wherein said component A consists of a di- or tri(meth) acrylate formed by the reaction of mono(meth)acrylate having a halogen substituted arom. ring with the functional groups of a polyfunctional compd. having 2-3 functional groups, and said component B is a radically polymerizable polyfunctional monomer C except A or a monomer mixture consisting of >=20wt% C with other vinyl monomer. |
