Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1983-09-07
1985-12-03
Robinson, Ellis P.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
350354, 351163, 351166, 252586, 427164, 428335, 428336, 428413, 428412, 428447, 428451, 428522, B32B 2708, B32B 2718, G02B 523
Patent
active
045566054
ABSTRACT:
Photochromic coating compositions for synthetic resin ophthalmic lenses to impart photochromic properties to the lenses are provided. The photochromic coating composition includes an organic silicon compound to impart a surface hard coating and a photochromic material dispersed in the hard coat to impart photochromic properties. The photochromic materials may include compounds including the molybdic acid amine group, dithizone-mercury polymers, halogenated silver or copper, and a benzopyrylospiran compound. The coating composition is prepared by dispersing the photochromic material in a silicon hard coating composition. The coating composition may be coated on the surface of a synthetic resin lens by dipping, spraying, spin coating, flow coating and the like and then dry-heated to be cured. The coating composition is applied in thicknesses from about 1 to 30 microns. The synthetic resin lenses which may be coated are transparent resins, such as polycarbonate resins, acryl resin, CR-39 resins, polystyrene and the like.
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Kawashima Hiroshi
Mogami Takao
Kabushiki Kaisha Suwa Seikosha
Robinson Ellis P.
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