Optical article having a dual layer temporary coating

Details Optical article having a dual layer temporary coating Optical article having a dual layer temporary coating

G - Physics

02

B

G02B 1/10 (2006.01) B24B 9/14 (2006.01) C03C 17/34 (2006.01) C03C 17/42 (2006.01) G02C 7/02 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2699618

The optical article of the invention includes, on at least one of its main surfaces, an outer hydrophobic and/or oleophobic coating and a dual-layer temporary coating in direct contact with the outer hydrophobic and/or oleophobic coating, characterised in that the dual-layer temporary coating includes a first layer in direct contact with the outer hydrophobic and/or oleophobic coating, selected from halogenated olefin polymers and polyurethanes, and a second layer deposited on the first one, of a polymer or polymer mixture acting as a water barrier. The invention can be used for edging ophthalmic lenses.

L'article d'optique comporte sur au moins une de ses surfaces principales un revêtement externe hydrophobe et/ou oléophobe et en contact direct avec le revêtement externe hydrophobe et/ou oléophobe un revêtement temporaire bicouche caractérisé en ce que le revêtement temporaire bicouche comprend une première couche, en contact direct avec le revêtement externe hydrophobe et/ou oléophobe choisi parmi les polymères d'oléfines halogénées et les polyuréthanes et une deuxième couche, déposée sur la première, d'un polymère ou mélange de polymères faisant barrière à l'eau.. Application au débordage des lentilles ophtalmiques.

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