Curable colored inks for making colored silicone hydrogel...

Details Curable colored inks for making colored silicone hydrogel... Curable colored inks for making colored silicone hydrogel...

G - Physics

02

B

G02B 1/04 (2006.01) B29D 11/00 (2006.01) C09D 11/10 (2006.01)

Patent

CA 2561788

The present invention provides an actinically or thermally curable ink for making colored silicone hydrogel contact lenses. The ink of the invention comprises at least one colorant, a solvent and a binder polymer including ethylenically unsaturated groups and segments derived from at least one silicone-containing vinylic monomer or macromer. The ink of the invention is characterized by having capability to be cured actinically or thermally to form a colored coat on a silicone hydrogel contact lens, wherein the colored coat has good adhesion to the silicone hydrogel contact lens without being covalently attached to the lens material of the contact lens. The invention also provides methods for making colored silicone hydrogel contact lenses.

L'invention concerne une encre pouvant être séchée de manière actinique ou thermique et destinée à la fabrication de lentilles de contact colorées en silicone hydrogel. L'encre selon l'invention comprend au moins un colorant, un solvant et un polymère liant renfermant des groupes éthyléniquement insaturés et des segments dérivés au moins d'un monomère ou macromère vinylique renfermant du silicone. L'encre selon l'invention est caractérisée en ce qu'elle peut être séchée de manière actinique ou thermique, aux fins de formation d'un revêtement coloré sur une lentille de contact en silicone hydrogel, le revêtement coloré possédant une bonne adhésion sur la lentille de contact en silicone hydrogel sans être fixé par covalence au matériau de la lentille de contact. L'invention concerne également des procédés de fabrication de lentilles de contact colorées en silicone hydrogel.

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