Coating processes – Optical element produced – Polarizer – windshield – optical fiber – projection screen – or...
Reexamination Certificate
2006-09-15
2010-02-16
Tran, Thao T. (Department: 1794)
Coating processes
Optical element produced
Polarizer, windshield, optical fiber, projection screen, or...
C427S164000, C427S493000
Reexamination Certificate
active
07662433
ABSTRACT:
Processes for obtaining an impact resistant, abrasion and/or scratch resistant photochromic article comprising a substrate having two main faces, comprising: preparing a curable coating composition comprising at least one unblocked polyisocyanate terminated polyurethane pre-polymer, at least one polyol, and at least one photochromic agent; depositing the curable coating composition onto at least part of a main face of the substrate; curing the coating composition for 10 minutes or less, at a temperature lower than or equal to 100° C. to form an impact resistant photochromic coating; forming an abrasion and/or scratch resistant coating on the impact resistant photochromic coating or forming a protective coating on the impact resistant photochromic coating and then forming an abrasion and/or scratch resistant coating on said protective coating. Articles obtainable by such processes, including but not limited to ophthalmic lenses. Curable coating compositions involved in such processes.
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PCT International Search Report and Written Opinion, issued in International Application No. PCT/EP2007/059673, dated Feb. 1, 2008.
Ford Christy
McClimans Pamela
Essilor International "Compagnie Generale d'Optique"
Fulbright & Jaworski L.L.P.
Tran Thao T.
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