| 摘要 |
<p>Describes a photochromic article, e.g., an ophthalmic photochromic article, such as a plastic lens, in which the article comprises, in combination, (1) a rigid substrate, such as a transparent thermoset or thermoplastic polymeric substrate, (2) a photochromic polymeric coating superposed on, e.g., appended to, at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one organic photochromic material, e.g., spirooxazine, naphthopyran and/or fulgide, (3) a film comprising a cross-linked polyhydroxy polymer, e.g., a poly(vinyl alcohol) polymer, appended to said photochromic polymeric coating, and (4) a further organic polymer layer that is superposed on said film comprising a cross-linked polyhydroxy polymer. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the further organic polymer coating, e.g., an abrasion-resistant coating comprising an organo silane; and a photochromic article having an antireflective coating affixed to the abrasion-resistant coating.</p> |
