Patent ID: 7638075
Filing Date: 2009-12-29
Classification: B29D,G02B

Abstract:
1. A method for making a colored contact lens comprising the steps of: (a) coating at least a portion of at least one lens-forming surface of a lens mold with a color coat comprising at least one colorant, and a binder polymer obtained by copolymerizing polymerizable components comprising (b) adding a lens forming composition to the lens mold while maintaining the color coat in position; (c) curing the lens-forming composition to form a contact lens with the color coat thereon; (d) activating hydrolytic or non-hydrolytic crosslinking reactions for crosslinking the latent crosslinkable groups in the color coat on the contact lens, thereby causing the color coat to adhere to the lens, wherein the step of activating hydrolytic or non-hydrolytic reactions is carried out by subjecting the contact lens with color coat thereon to at least one condition selected from the group consisting of exposure to moisture, exposure to nucleophilic catalysis, exposure to alkoxy silane, exposure to metal oxides, exposure to a mixture of alcohol and carboxylic acid, exposure to silanols, exposure to acetoxysilanes, exposure to carboxylic acids, and exposure to acids, heat, or combinations thereof.