Water plasticized high refractive index polymer for ophthalmic applications
AssigneeSurgidev Corporation
InventorKhalid Mentak
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Abstract
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.
Claims24
A hydratable copolymer comprising:
- a) at least 20 weight percent of a first monomeric component, which comprises an aryl acrylate or an aryl methacrylate;
- b) at least about 10 weight percent of a second monomeric component, which comprises a monomer having an aromatic ring with a substituent having at least one site of ethylenic unsaturation, wherein the second monomeric component is other than acrylate;
- and
- c) at least 10 weight percent of a third monomeric component, which comprises a high water content hydrogel-forming monomer;
- wherein the copolymer has a refractive index greater than about 1.50, is rigid at about room temperature when dry, is foldable at about room temperature when hydrated, and is machinable at about room temperature when dry.
A hydratable copolymer comprising:
- a) at least about 20 weight percent of a first monomeric component selected from the group consisting of ethylene glycol phenyl ether acrylate, and polyethylene glycol phenyl ether acrylate;
- b) at least about 10 weight percent of a second monomeric component selected from the group consisting of substituted styrene and unsubstituted styrene;
- c) at least about 10 weight percent of a third monomeric component selected from the group consisting of hydroxy ethyl methacrylate, hydroxyethoxy ethyl methacrylate, and methacrylic acid;
- and
- d) less than about 10 weight percent of a crosslinking agent selected from the group consisting of a diacrylate and a dimethacrylate,
- wherein the copolymer has a refractive index greater than about 1.50, is rigid at about room temperature when dry, and is foldable at about room temperature when hydrated, and is machinable at about room temperature when dry.
Dependencies are inferred from the claim text.