Silicone hydrogels

Details Silicone hydrogels Silicone hydrogels

C - Chemistry, Metallurgy

08

F

C08F 2/38 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2618035

The present invention provides silicone hydrogel materials having relatively high oxygen permeability and a relatively low modulus. The relatively-low modulus is achieved by adding a chain transfer agent into a polymerizable fluid composition in an amount sufficient to provide to the resultant silicone hydrogel material with a reduced modulus. In addition, the invention provides silicone hydrogel contact lenses comprising a silicone hydrogel material of the invention, a method for making a silicone hydrogel material of the invention, and a method for making a silicone hydrogel contact lens of the invention.

La présente invention propose des matériaux d'hydrogel en silicone ayant une perméabilité à l'oxygène relativement élevée et un module relativement faible. Le module relativement faible est obtenu en ajoutant un agent de transfert de chaîne dans une composition fluide polymérisable en une quantité suffisante pour conférer au matériau d'hydrogel en silicone un module réduit. De plus, l'invention propose des lentilles de contact en hydrogel de silicone comprenant un matériau d'hydrogel en silicone de l'invention, un procédé pour préparer un matériau d'hydrogel en silicone de l'invention, et un procédé pour fabriquer une lentille de contact en hydrogel en silicone de l'invention.

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