Patent ID: 7550519
Filing Date: 2009-06-23
Classification: B29D,C08J,C09D,G02B,G02C

Abstract:
1. An ink for making colored silicone hydrogel contact lenses, comprising at least one colorant, a solvent and a photo-curable or thermo-curable silicone-containing binder polymer including ethylenically unsaturated groups and segments derived from at least one silicone-containing vinylic monomer or macromer, wherein the silicon-containing binder polymer is a obtained by (1) copolymerizing a polymerizable composition to obtain a silicone-containing polymer, wherein the polymerizable composition comprising: (2) introducing the ethylenically unsaturated groups to the silicone-containing polymer to form the photo- or thermo-curable silicone-containing binder polymer by reacting the silicone-containing polymer with an ethylenically functionalizing agent including ethylenically unsaturated groups and a second functional group, wherein the first functional group of the silicone-containing polymer and second functional group of the ethyleniacally functionalizing agent react with each other to form a covalent linkage, wherein the ink is characterized by having capability to be cured actinically or thermally to form a colored coat on a contact lens, wherein the colored coat has good adhesion to the contact lens without being covalently attached to the lens material of the contact lens.