| 摘要 |
A photochromic curable composition comprising, as radically polymerizable component (A), a silsesquioxane component (A1) having a radically polymerizable group and a bifunctional radically polymerizable monomer (A2) represented by the following general formula (1),
wherein a is a number of 0 to 30, and b is a number of 0 to 30 on condition that an average value of a + b is 2 to 30,
R 1 , R 2 , R 3 and R 4 are each a hydrogen atom or a methyl group, and
A is a divalent organic group on condition that the number of carbon atoms is 1 to 20,
and a photochromic compound (B). The photochromic curable composition is useful specifically as a photochromic coating agent, and from which photochromic lenses can be produced by the coating method having a hardness large enough not to be get scratched even in the step of machining the lenses, and featuring excellent photochromic properties such as color density, fading rate and repeat durability. |
