Thermoformable ophthalmic lens

Details Thermoformable ophthalmic lens Thermoformable ophthalmic lens

B - Operations, Transporting

29

D

B29D 11/00 (2006.01) A45C 13/10 (2006.01) A61F 2/16 (2006.01) C08F 220/20 (2006.01) C08F 220/56 (2006.01) C08F 226/06 (2006.01) C08L 51/00 (2006.01) C08L 53/00 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2379385

A melt processable hydrogel block copolymer is made from hydrophilic and hydrophobic monomers and has sufficient internal association without crosslinking to provide a dimensionally stable hydrogel at temperatures up to at least about 60 ~C. The polymer may be thermally processed into an ophthalmic device, and then hydrated into a hydrogel material. Optionally, the polymer may undergo treatment before, during or after hydration to form crosslinks.

L'invention concerne un copolymère bloc hydrogel transformable à chaud, qui est constitué de monomères hydrophiles et hydrophobes et qui possède une association interne suffisante sans réticulation pour fournir un hydrogel stable du point de vue dimensionnel à des températures pouvant atteindre au moins 60 ·C environ. Le polymère peut être traité thermiquement de façon à obtenir un dispositif ophtalmique, puis hydraté afin d'obtenir un hydrogel. Le polymère peut éventuellement subir un traitement avant, durant ou après l'hydratation afin de former des liaisons réticulaires.

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