Ophthalmic lens polymer incorporating acyclic monomer
AssigneeJohnson & Johnson Vision Products, Inc.
InventorDouglas G. Vanderlaan
Life of this patent
Estimating the term…
Abstract
A ophthalmic lens comprising a polymer composition composed of the reaction product of a hydrophilic monomer and an acyclic monomer is disclosed. The preferred hydrophilic monomer is hydroxyethyl methacrylamide (HMA), and the preferred acyclic monomer is hydroxyoctyl methacrylate (HOMA). The monomeric components can be polymerized in a polystyrene mold to make contact lenses, and when swollen with water, are suitable for use as soft hydrogel contact lenses. The preferred compositions also include a zwitterionic monomer, such as a sulfobetaine, and a crosslinking agent, such as ethylene glycol dimethacrylate (EGDMA). Hydrogel contact lenses made from these polymers exhibit high water content and mechanical strength, and are compatible with polystyrene molds.
Claims16
An ophthalmic lens that comprises a polymer comprising the reaction product of a hydrophilic monomer and an acyclic monomer represented by the following formula:
- ##STR4## wherein:
- R.sup.1 is hydrogen or methyl;
- each of R.sup.2, R.sup.3, R.sup.4 and R.sup.5 independently is hydrogen or an acyclic monovalent alkyl radical, provided the total number of carbon atoms of R.sup.2 +R.sup.3 +R.sup.4 +R.sup.5 is between 4-20, inclusive;
- X is O, NH or NR.sup.6 ;
- and
- R.sup.6 is a straight or branched alkyl radical.
The ophthalmic lens of claim wherein the sulfobetaine monomer is N-(3-sulfopropyl)-N-methacryloxyethyl-N,N-dimethyl ammonium betaine.
Dependencies are inferred from the claim text.