METHOD FOR PREPARING ANTISTATIC UV CURABLE HARDCOATINGS ON OPTICAL ARTICLES
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United States of America Patent
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Jul 2, 2013
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Jan 4, 2011
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Abstract
The present invention is drawn to a method for manufacturing antistatic UV-cured hard-coatings on optical articles, comprising (a) coating an organic or mineral optical substrate with an essentially anhydrous solution containing from 20% to 90% by weight, relative to the total dry matter of the solution, of at least one non hydrolyzed epoxyalkyltrialkoxysilane and at least 3.2% by weight, relative to the total dry matter of the solution, of at least one photoinitiator selected from the group consisting of triarylsulfonium salts, diaryliodonium salts, and mixtures thereof, (b) curing the resulting coating by irradiation with UV-radiation, said method not comprising any hydrolysis step before the UV curing step.
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