Shape memory polymer or alloy ophthalmic lens mold and methods of forming ophthalmic products
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsGregory J. Hofmann, Kenneth W. Foley, Thomas R. Rooney, Patrick J. Hood
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Abstract
A shape memory polymer contact lens mold is formed from a sheet of a shape memory polymer in a press, an agile tool or by an agile tool formed by an inert gas at a temperature at or above the glass transition temperature which is thereupon cooled to below the glass transition temperature and removed therefrom.
Claims32
An ophthalmic mold comprising a shape memory polymer that is a copolymer of styrene and a vinyl compound.
An ophthalmic mold comprising a shape memory polymer reaction mixture comprising about 30 to about 95 percent styrene, about 5 to about 60 percent vinyl compound, about 0.5 to about 5 percent of a difunctional crosslinking agent, wherein said percentages being about weight based on the total weight of the mixture.
Dependencies are inferred from the claim text.