Incorporation of adsorbents during extraction and/or...

Details Incorporation of adsorbents during extraction and/or... Incorporation of adsorbents during extraction and/or...

C - Chemistry, Metallurgy

08

F

C08F 6/10 (2006.01) A45C 11/00 (2006.01) A61F 2/16 (2006.01) B29C 71/00 (2006.01) B29D 11/00 (2006.01) B65D 51/24 (2006.01) B65D 81/26 (2006.01) C08J 3/00 (2006.01)

Patent

CA 2190166

Disclosed are methods for extracting leachable materials from a hydratable polymer by incorporation of an adsorbent into the solution employed to effect extraction. Suitable adsorbents ate characterized as having a higher affinity for the leachable materials than either the hydratable polymer or the solvent employed in the solution. Also disclosed are sealed packages comprising an aqueous solution, an adsorbent and a hydratable polymer in the form of an ophthalmic device.

Procédé d'extraction de matières lessivables contenues dans un polymère hydratable selon lequel on incorpore un adsorbant dans la solution employée pour effectuer l'extraction. Les adsorbants appropriés se caractérisent par le fait qu'ils possèdent une plus forte affinité pour les matières lessivables que le polymère hydratable ou le solvant employé dans la solution. On décrit également des emballages hermétiquement fermés contenant une solution aqueuse, un adsorbant et un polymère hydratable se présentant sous forme d'un dispositif ophtalmique.

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