Tintable coatings for glass ophthalmic lenses

Details Tintable coatings for glass ophthalmic lenses Tintable coatings for glass ophthalmic lenses

C - Chemistry, Metallurgy

03

C

6/222, 88/39

C03C 17/30 (2006.01) C03C 17/34 (2006.01)

Patent

CA 1320656

Abstract of the Disclosure This invention relates to coatings for application to glass lenses to provide a tint thereto. The coatings at a thickness of no more than 10 microns in conjunction with organic dyes conventionally used to tint organic plastic lenses will impart a visible transmission of less than 50%, preferably less than 30%. The coatings consist essentially of an alkyl siloxane containing a dipolar silane selected from the group consisting of an ester-functional silane, a hydroxy-functional silane, amino-functional silane, a carboxylic acid-functional silane, and a halide form of those silanes.

602099

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