Optical Article Comprising a Temporary Layer of Aliphatic Thermoplastic Polyurethane and Use in Edging
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsChefik Habassi, Matthieu Koscher
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Abstract
The optical article of the invention is characterized in that it comprises on one of the main surfaces thereof an external hydrophobic and/or oleophobic coating, a dried temporary coating of a composition comprising, preferably consisting in, one or more aliphatic thermoplastic polyurethane(s) having a polyether or polyester backbone directly deposited onto the external hydrophobic and/or oleophobic coating. Application to ophthalmic lenses.
Claims28
-24. (canceled)
An optical article comprising on a main surface thereof an external hydrophobic and/or oleophobic coating and a dried temporary coating of a composition comprising one or more aliphatic thermoplastic polyurethane having a polyether or polyester backbone is directly deposited onto the external hydrophobic and/or oleophobic coating.
Dependencies are inferred from the claim text.