Patent ID: 7566746
Filing Date: 2009-07-28
Classification: C08J,G02B

Abstract:
1. A contact lens, comprising: (a) a core material having no theoretical ionic charge and is a fluorine-containing or siloxane-containing polymeric material, wherein said core material is a copolymerization product of a composition including a silicone-containing monomer or macromer and a hydrophilic comonomer; and (b) a surface coating, including at least one layer of a polyanionic material which is non-covalently bonded to the core material which is not previously treated to increase its surface charge density, wherein the polyanionic material is selected from the group consisting of polymethacrylic acid, polyacrylic acid, poly(thiophene-3-acetic acid), poly(4-styrenesulfonic acid), derivatives thereof and mixtures thereof.