High refractive index, optically clear and soft hydrophobic acrylamide copolymers
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United States of America Patent
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May 18, 2004
Grant Date -
Dec 4, 2003
app pub date -
Jun 3, 2002
filing date -
Jun 3, 2002
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Abstract
High refractive index, optically clear and soft hydrophobic acrylamide copolymers and ophthalmic lenses made therefrom are provided. The copolymers are comprised of a hydrophobic acrylamide monomer of N-Benzyl-N-isopropylacrylamide and at least one monomer of an alkyl acrylate and/or alkyl methacrylate. The copolymers and ophthalmic lenses of the present invention are hydrophobic and soft, with a low glass transition temperature (Tg) and a high refractive index.
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