Process for Manufacturing an Ophthalmic Lens by Impregnation of a Benzotriazole Derivative
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United States of America Patent
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Jun 2, 2016
app pub date -
Jun 19, 2014
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Jul 5, 2013
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Abstract
The present invention relates to a process for manufacturing an ophthalmic lens comprising a UV-absorbent transparent organic substrate, comprising submerging the organic substrate in a bath consisting of an aqueous solution containing a 2-(2-hydroxy-4-alkyloxyphenyl)-2H-benzotriazole, in which the alkyl group is linear or branched and contains 3 to 12 carbon atom
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