Actinically curable silicone hydrogel copolymers and uses...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 220/10 (2006.01) C08F 212/14 (2006.01) C08F 230/08 (2006.01) C08F 290/06 (2006.01) C09D 11/00 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2671740

The present invention provides inks and methods for making colored silicone hydrogel contact lenses. The ink of the invention comprises an actinically-curable binder copolymer comprising fluorine-containing segments and is characterized by having capability to be cured actinically or thermally to form a colored film on a molding surface of a mold or a silicone hydrogel contact lens and by having an increased durability in a solvated state in a silicone-hydrogel lens formulation in relation to a control colored film obtained from a control ink including an actinically-curable fluorine-free binder copolymer. The invention also provides methods for making colored silicone hydrogel contact lenses based on print-on-mold processes for producing colored contact lenses.

La présente invention concerne des encres et des procédés pour fabriquer des lentilles de contact colorées en hydrogel de silicone. L'encre de l'invention comprend un copolymère liant durcissable actiniquement comprenant des segments contenant du fluor et qui est caractérisé par le fait de pouvoir être durci actiniquement ou thermiquement pour former un film coloré sur une surface de moulage d'un moule ou sur une lentille de contact en hydrogel de silicone et en ayant une durabilité accrue dans un état solvaté dans une formulation pour lentille en hydrogel de silicone associée à un film coloré témoin obtenu à partir d'une encre témoin comprenant un copolymère liant exempt de fluor et durcissable actiniquement. L'invention concerne également des procédés permettant de fabriquer des lentilles de contact colorées en hydrogel de silicone en se basant sur des procédés d'impression sur un moule pour produire des lentilles de contact colorées.

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