C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 9/02 (2006.01) G02B 1/04 (2006.01) G02B 1/10 (2006.01) G02B 5/23 (2006.01) G02B 1/11 (2006.01)
Patent
CA 2466331
Described is a photochromic article that includes a substrate and at least a partial coating of an at least partially cured polymerizable composition of a photochromic amount of at least one photochromic compound, at least one material having at least one carbonate group and at least one hydroxyl group, and at least one monoisocyanate containing material having at least one unsaturated group. Also described are photochromic optical elements such as ophthalmic lenses, prepared from an optical element substrate coated with the photochromic polymerizable composition.
L'invention porte sur un article photochrome comprenant un substrat et au moins un revêtement partiel formé dans au moins une composition polymérisable partiellement durcie renfermant une certaine quantité d'au moins un photochrome, d'au moins un matériau possédant au moins un groupe carbonate et au moins un groupe hydroxyle et d'au moins un matériau renfermant un isocyanate et possédant au moins un groupe insaturé. L'invention porte également sur des éléments optiques photochromes tels que des lentilles ophtalmiques préparées à partir d'un substrat constitué d'éléments optiques et recouvert de la composition polymérisable photochrome.
Anderson Lawrence G.
Daughenbaugh Randy
King Eric M.
Stewart Kevin J.
Welch Cletus N.
Borden Ladner Gervais Llp
Transitions Optical Inc.
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