초록 ▼

An abrasion-resistant coated plastic lens element and a method for coating the element with an abrasion-resistant coating includes forming a coating on a face of a mold that is substantially cured and adherable to lens-forming material. The coating composition consists of reactants, approximately 70

An abrasion-resistant coated plastic lens element and a method for coating the element with an abrasion-resistant coating includes forming a coating on a face of a mold that is substantially cured and adherable to lens-forming material. The coating composition consists of reactants, approximately 70% to 95% of which have at least triacrylate functionality and approximately 5% to 30% of which have diacrylate functionality, a photoinitiator, a polymerization inhibitor reactive with oxygen, and a silane adhesion promoter and an acid to activate the silane adhesion promoter. The coating is applied to the face of the mold to form a substantially uniform coating and is then subjected to ultraviolet light in an ambient oxygen-containing environment such that a hard abrasion-resistant coating is formed on the mold. The mold is then filled with a lens-forming composition which is reactive with acrylate groups of the coating at a coating/lens interface. The lens-forming composition is permitted to cure in the mold to form a lens having a hard abrasion-resistant coating. No further post curing treatment is required since the lens leaves the mold at its maximum cure, hardness, and abrasion resistance.

대표청구항 ▼

A process for producing a coated ophthalmic lens, the processing comprising: applying a coating composition in a solvent to a face of a mold, the coating composition including polymeric reactants, 70% to 95% of which have at least triacrylate functionality and 5% to 30% of which have diacrylate func

A process for producing a coated ophthalmic lens, the processing comprising: applying a coating composition in a solvent to a face of a mold, the coating composition including polymeric reactants, 70% to 95% of which have at least triacrylate functionality and 5% to 30% of which have diacrylate functionality, a photoinitiator, a polymerization inhibitor reactive with oxygen and in an amount insufficient to affect substantial curing of the coating composition and in an amount insufficient to substantially affect abrasion resistance of the coating, a silane adhesion promoter and an acid; subjecting the coating composition to an initial single dose of ultraviolet radiation in an oxygen environment sufficient to substantially polymerize the reactants so that the coating is in a hard abrasion-resistant state; filling the lens mold with the lens-forming material; permitting the lens forming material to harden; and removing the hardened lens with the coating attached thereto from the mold.