Prepolymers with dangling polysiloxane-containing polymer...

B - Operations – Transporting – 29 – D

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B29D 11/00 (2006.01) C08G 77/442 (2006.01) G02B 11/04 (2006.01)

Patent

CA 2679322

The invention provide a new class of silicone-containing prepolymers containing dangling polysiloxane-containing polymer chains. This class of silicone-containing prepolymer is capable of being actinically crosslinked to form a silicone hydrogel material with a relatively high oxygen permeability, a reduced elastic modulus, and a relatively high ion permeability. The present invention is also related to silicone hydrogel contact lenses made from this class of silicone-containing prepolymers and to methods for making the silicone hydrogel contact lenses.

L'invention concerne une nouvelle classe de prépolymères contenant de la silicone contenant des chaînes polymères contenant du poly(siloxane) pendillant. Cette classe de prépolymère contenant de la silicone peut être réticulée actiniquement pour former un matériau hydrogel de silicone avec une perméabilité à l'oxygène relativement élevée, un module d'élasticité réduit et une perméabilité aux ions relativement élevée. La présente invention concerne également des lentilles de contact à hydrogel de silicone préparées à partir de cette classe de prépolymères contenant de la silicone et des procédés de préparation de lentilles de contact à hydrogel de silicone.

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