Water plasticized high refractive index polymer for...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 220/18 (2006.01) A61L 27/16 (2006.01) C08F 212/04 (2006.01) C08F 220/06 (2006.01) C08F 220/20 (2006.01) C08F 220/30 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2364530

A high refractive index, foldable polymer suitable for use in ophthalmic devices, such as intraocular lenses, is provided. The polymer may be produced from a polymerization reaction of first, second and third monomeric components and a crosslinking agent. The first monomeric component includes an aryl acrylate or an aryl methacrylate. The second monomeric component, which is not an acrylate, includes a monomer having an aromatic ring with a substituent having at least one site of ethylenic unsaturation. The third monomeric component includes a high water content hydrogel-forming monomer. The resulting high refractive index copolymer is durable enough to be cut and polished when dry, and becomes soft and foldable when hydrated.

L'invention concerne un polymère pliable, à indice de réfraction élevé, conçu pour être utilisé dans des dispositifs ophtalmiques, tels que des lentilles intraoculaires. Ce polymère peut être produit à partir d'une réaction de polymérisation d'un premier, d'un second, et d'un troisième composants monomères, avec un agent de réticulation. Le premier composant monomère comprend un acrylate d'aryle ou un méthacrylate d'aryle. Le second composant monomère, qui n'est pas un acrylate, comprend un monomère possédant un cycle aromatique avec un substituant possédant au moins un site d'insaturation éthylénique. Le troisième composant monomère comprend un monomère formant un hydrogel à teneur élevée en eau. Le copolymère résultant à indice de réfraction élevé est suffisamment durable pour le couper et le polir lorsqu'il est sec, et devient souple et pliable lorsqu'il est hydraté.

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