HALOGEN-CONTAINING RESIN LENS MATERIAL

摘要

OF the DISCLOSURE A halogen-containing resin lens material, having a refractive index of nD - 1.55 or higher, an Abbe number of 27 or higher and good dyeable property and comprising a copolymer containing 10 to 90 wt.% of a monomer (I) represented by the formula (I) shown below: ......... (I) wherein: R1 represents hydrogen or CH3 group; X1 a halogen atom except for flourine and p the number of substituted halogens which is an integer selected from 1 to 5, and n is an integer selected from 1 to 4, R1 existing in plural number and being either identical or different, X1 when existing in plural number being either identical or different and 10 to 70 wt.% of a crosslinking monomer having two or more polymerizable functional groups (the percentages being based on the copolymer weight).