| 摘要 |
A novel benzophenone type polymerizable dye having a urethane bond; a process for producing the same; and an ophthalmic lens material containing the polymerizable dye. There are provided benzophenone type polymerizable dyes of the general formula: (1) wherein each of R 1 and R2 independently is a hydrogen atom, hydroxyl, carboxyl, a C1-C8 alkyl, a C1-C 8 alkoxyl, sulfonate or benzyloxy; each of m and n independently is an integer of 0 to 18; and R3 is a polymerizable functional group selected from among vinyl, acryloyl and methacryloyl. |
