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Water plasticized high refractive index polymer for ophthalmic applications

  • US 6,281,319 B1
  • Filed: 07/22/1999
  • Issued: 08/28/2001
  • Est. Priority Date: 04/12/1999
  • Status: Expired due to Term
First Claim
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1. 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.

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