Tintable coatings for glass ophthalmic lenses

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

1988-07-05

1990-12-11

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Composite

Of quartz or glass

428447, 351163, 351166, B32B 1706, B32B 904, G02C 702, G02C 710

Patent

active

049770292

ABSTRACT:
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.

REFERENCES:
patent: 4355135 (1982-10-01), January
patent: 4547397 (1985-10-01), Burzynski
patent: 4800122 (1989-01-01), Sallavanti

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