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US 5,779,943 AGranted
Molded polymeric object with wettable surface made from latent-hydrophilic monomers
AssigneeJohnson & Johnson Vision Products, Inc.
InventorsJohn B. Enns, Allan W. Kimble, Susan B. Orr, Douglas G. Vanderlaan
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Abstract
This invention provides a molded polymeric object, partially or completely coated with a hydrophilic polymer which provides a wettable surface to the molded object such as a contact lens. It also provides a process for using latent-hydrophilic monomers to make molded objects with wettable surfaces.
Claims28
A process for preparing the molded article of manufacture comprising a body of a bulk polymer coated with a latent-hydrophilic polymerizable material,
- (a) coating an inner surface of a mold with a latent-hydrophilic, normally hydrophobic polymerizable material;
- (b) filling the coated mold of step (a) with a monomeric material which is polymerizable to an oxygen-permeable polymeric material;
- (c) curing the mold contents of step (b) to produce a coated molded object;
- and
- (d) treating said coated molded object of step (c) with a solution having a pH from 5 to 9 to convert the coating to a hydrophilic form.
2 more elements
Dependencies are inferred from the claim text.