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US 4,663,409 AGranted
Alpha, beta-unsaturated carbonyl modified amino acid monomer and polymers for biomedical uses
AssigneeBausch & Lomb Incorporated
InventorsGary D. Friends, Richard C. Chromecek, Raymond A. Yourd, III
Life of this patent
Estimating the term…
Abstract
Inclusion of carbonyl modified amino acid monomers in polymeric compositions for biomedical applications, including contact lenses, increases the water content and oxygen permeability of the polymer without significant changes in other desirable properties of the polymer.
Claims11
A shaped article for biomedical applications made from a polymer formed by polymerizing together a mixture comprising:
- (1) a major amount of one or more hydrophilic monomers having an olefinic bond,
- (2) an alpha, beta-unsaturated carbonyl modified amino acid monomer in an amount of 1 to 15 weight percent, and
- (3) a cross-linking agent in an amount of at least 0.1 weight percent.
Dependencies are inferred from the claim text.