Photochromic article

Details Photochromic article Photochromic article

2002-11-14

2008-12-16

Tran, Thao T. (Department: 1794)

Compositions

Light transmission modifying compositions

Displaying color change

C359S238000, C428S423300, C428S424400, C428S424600, C428S412000

Reexamination Certificate

active

07465414

ABSTRACT:
Describes an optical article, e.g., an ophthalmic photochromic article, such as a lens, in which the article includes: (1) a transparent substrate, such as a thermoset or thermoplastic plastic substrate, (2) a multiply laminate adjacent to at least one surface of the substrate, the laminate comprising (i) a transparent, thermoplastic polyurethane film, the thermoplastic, polyurethane film providing a desirable light filtering property, e.g., photochromism, and being juxtaposed to the surface of the substrate, the polyurethane being formed from a material comprising polyether-based polyurethane or polycarbonate-based polyurethane, and (ii) a transparent protective film of polymeric material, e.g., polycarbonate film, adjacent to the thermoplastic polyurethane film. Describes also the aforedescribed optical article having an abrasion-resistant coating affixed to the protective film, e.g., an organo-silane abrasion-resistant coating; and an optical article having an antireflective coating adhered to the abrasion-resistant coating.

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