Importance

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Abstract

Describes a photochromic article, e.g., an ophthalmic photochromic article, such as a plastic lens, in which the article includes (1) a rigid substrate, such as a transparent thermoset or thermoplastic polymeric substrate, (2) a photochromic polymeric coating appended to, at least a portion of at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one photochromic material, e.g., spirooxazine, naphthopyran and/or fulgide, and (3) a layer chosen from a second organic polymeric coating or an abrasion resistant coating that is superposed on said photochromic polymeric coating. Describes incorporating at least one polysiloxane surface active agent within the photochromic polymeric coating in amounts sufficient to inhibit migration of the photochromic material, e.g., into said layer superposed on said photochromic polymeric coating. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the second organic polymeric 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.

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First Claim