Patent ID: 9588257
Date: 2017-03-07
CPC Classifications: C08F,C08G,C08L,C09D,G02B,G02C

Claim:
1. A photochromic coating agent comprising a photochromic curable composition which includes: as radically polymerizable component (A), a silsesquioxane component (A1) having a radically polymerizable group and a bifunctional radically polymerizable monomer (A2), and a photochromic compound (B); said silsesquioxane component (A1) being contained in an amount of 1 to 150 parts by mass per 100 parts by mass of the bifunctional radically polymerizable monomer (A2); said silsesquioxane component (A1) having a weight average molecular weight of 2,000 to 10,000 and containing said radically polymerizable groups in a number at a ratio of 70 to 100% per the total number of substituents bonded to the silicon atoms; and said bifunctional radically polymerizable monomer (A2) being 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 “A” is a divalent organic group, on condition that the number of carbon atoms is 1 to 20, which is selected from the group consisting of: wherein in the formula (1 c), R c and d are integers of 0 to 4, 6-membered ring B is a benzene ring or a cyclohexane ring, and when the 6-membered ring B is the benzene ring, X is a divalent group represented by —O—, —S—, —S(O) and when the 6-membered ring B is the cyclohexane ring, X is a divalent group represented by —O—, —S—, —CH said silsesquioxane component (A1) being an organopolysiloxane comprising a basic constituent unit represented by the following composition formula (3), wherein R represents substituents bonded to silicon atoms, at least one of which being a radically polymerizable group, and g is a number in a range of 4 to 100.