| abstract |
PROBLEM TO BE SOLVED: To achieve excellent adhesion between a substrate and a photochromic layer in the production of a photochromic optical article, thereby improving optical characteristics of a photochromic lens or the like. As a first means for achieving this object, it is proposed to form a urethane primer layer between a substrate and a photochromic layer. The urethane-based primer layer is formed by applying a moisture curable polyurethane resin and / or a precursor thereof and a solution containing a solvent having a boiling point of 70 ° C. or more and a solubility parameter of 8 or more, and then removing the solvent to obtain a moisture curable polyurethane. It is obtained by curing the resin and / or its precursor. Further, as a second means for achieving the above object, from 100 parts by weight of radical polymerizable monomer component, 0.01 to 20 parts by weight of photochromic compound, 0.001 to 5 parts by weight of silicone-based or fluorine-based surfactant. Proposed photochromic coating agent. [Selection figure] None |