Methods and systems for leaching silicone hydrogel...

Details Methods and systems for leaching silicone hydrogel... Methods and systems for leaching silicone hydrogel...

B - Operations, Transporting

29

D

B29D 11/00 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2634807

A method for removing unreacted components and diluents trom an ophtnalmic lens comprising silicone, the method comprising: exposing said ophthalmic lens to a first aqueous solution comprising about 5% or more of a first leaching agent comprising polyoxyethylene lauryl ether (C12E1O); heating said first aqueous solution to which the ophthalmic lens is exposed; and rinsing said ophthalmic lens through contact with a second aqueous solution until said lens comprises a level of unreacted components and diluents that is below a predetermined threshold.

L'invention concerne des procédés et des systèmes permettant de traiter des lentilles constituées d'hydrogel en utilisant des aqueuses en tant qu'adjuvants de lixiviation.

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