Molds for production of ophthalmic devices
AssigneeBausch & Lomb Incorporated
InventorsBruce E. Lawton, Stephen P. Johnston, Edward A. Vaquero, Sanjay Rastogi
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Abstract
A mold assembly for the manufacture of at least one ophthalmic device used in or on the eye is disclosed. The mold assembly includes a mateable pair of mold parts wherein at least one of the mold parts comprises at least an oxygen-absorbing mold material and an oxygen scavenger composition containing (i) an oxygen scavenging polymer comprising a polymer backbone and one or more substituted or unsubstituted cyclic olefinic groups covalently linked to the polymer backbone; and (ii) an oxygen scavenging catalytic amount of a transition metal catalyst.
Claims16
A method of preparing a mold assembly for the manufacture of at least one ophthalmic device used in or on the eye, the method comprising the step of injection molding at least one part of a mold assembly comprising at least one anterior and one posterior mold part, wherein at least one of the anterior and one posterior mold part comprises an oxygen-absorbing mold material and an oxygen scavenger composition comprising (i) an oxygen scavenging polymer comprising a polymeric backbone and one or more substituted or unsubstituted cyclic olefinic groups covalently linked to the polymer backbone;
- and (ii) an oxygen scavenging catalytic amount of a transition metal catalyst.
Dependencies are inferred from the claim text.