Photochromic glass and process for its production
AssigneeAsahi Glass Company, Limited
InventorsHiroyuki Tomonaga, Takeshi Morimoto, Taki Matsumoto
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Abstract
A photochromic glass excellent in coloration/color fading characteristics, which comprises a glass substrate and a photochromic film formed on the glass substrate, wherein the photochromic film comprises at least one metal selected from the group consisting of platinum, palladium, iridium, rhodium and gold, copper, silver halide crystallites and silicon oxide, and a process for its production.
Claims9
A photochromic glass comprising a glass substrate and a photochromic film formed on the glass substrate, wherein the photochromic film comprises at least one metal selected from the group consisting of platinum, palladium, iridium, rhodium and gold, copper, silver halide crystallites and silicon oxide.
A process for producing a photochromic glass, which comprises coating on a glass substrate a coating solution containing superfine particles containing silver, a first silicon compound and a compound which liberates halogen by thermal decomposition, followed by heating to form a lower layer film, and then, coating on the lower layer film a coating solution containing at least one metal selected from the group consisting of platinum, palladium, iridium, rhodium and gold, or a compound of such metal, a second silicon compound and a copper compound, followed by heating to form an upper layer film.
Dependencies are inferred from the claim text.