Colored printing ink for contact lenses

Details Colored printing ink for contact lenses Colored printing ink for contact lenses

G - Physics

02

B

G02B 1/04 (2006.01) B29D 11/00 (2006.01) G02C 7/04 (2006.01)

Patent

CA 2440900

The present invention provides novel inks and methods for making a colored polymeric substrate, preferably a contact lens. In the inventive method at least a portion of a surface of a lens is coated with a color coat comprising at least one colorant, and a binder polymer obtained by copolymerizing a first monomer being ethylenically unsaturated and having a latent cross-linkable pendent group; and a second monomer having an ethylenically unsaturated double bond copolymerizable with the first monomer. The lens is then subjected to conditions that cause the color coat to adhere to the lens.

L'invention concerne des nouvelles encres et des procédés de production de substrats polymères de couleur, de préférence des lentilles de contact. Dans le procédé de l'invention, au moins une partie d'une surface de la lentille est recouverte d'une couche de couleur comprenant au moins un colorant et d'un polymère liant obtenu par copolymérisation d'un premier monomère insaturé en éthylène et possédant un groupe pendant réticulable latent et d'un second monomère possédant une double liaison insaturée en éthylène, copolymérisable avec le premier monomère. Ladite lentille est ensuite exposée à des conditions induisant l'adhérence de la couche de couleur à la lentille.

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