METHOD OF IMPARTING IMPACT RESISTANCE TO A PLASTIC OPHTHALMIC LENS, COMPOSITIONS FOR USE THEREIN AND A LENS PREPARED THEREBY

METHOD OF IMPARTING IMPACT RESISTANCE TO A PLASTIC OPHTHALMIC LENS, COMPOSITIONS FOR USE THEREIN AND A LENS PREPARED THEREBY

A method is disclosed for imparting impact resistance to a plastic ophthalmi c lens. The method consists of applying a coating of a multifunctional acrylate in a solvent mixture to the back surface of the lens, and curing the multifunctional acrylate to form an impact resistance imparting coat. The...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BERZON, JULIE S, TATMAN, SHEILA M, BENJAMIN, KELLY, DANG, HOA T, VALERI, ROBERT A, WHITE, SIDNEY S
Format: Patent
Sprache:eng ; fre
Schlagworte:
CONTACT LENSES
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SPECTACLES
SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
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Beschreibung
Zusammenfassung:A method is disclosed for imparting impact resistance to a plastic ophthalmi c lens. The method consists of applying a coating of a multifunctional acrylate in a solvent mixture to the back surface of the lens, and curing the multifunctional acrylate to form an impact resistance imparting coat. The multifunctional acrylate preferably has at least about 40 % by weight of a difunctional acrylate. The multifunctional acrylate preferably has a glass transition temperature less than about 60 .degree.C. Lenses with an impact resistance imparting coat on the back, and an abrasion resistant coat on at least the front of the len s, are also disclosed.