Hydrophilic copolymer compositions useful as contact lenses
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United States of America Patent
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-
May 22, 1984
Grant Date -
N/A
app pub date -
Aug 11, 1982
filing date -
Aug 11, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Novel hydrophilic copolymers are prepared containing a major portion of polymerized units of an hydroxyalkyl acrylate or methacrylate monomer and a minor portion of a nitro-substituted aryl acrylate or methacrylate monomer, and optionally with a minor amount of an alkylene glycol diacrylate or methacrylate as a cross-linking agent. These copolymers are made by a free radical polymerization mechanism or by gamma radiation of the reaction mixture. These copolymers are particularly useful as soft contact lens polymers, being extremely resistant to clouding and/or discoloration in use.
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