Patent ID: 6730244
Filing Date: 2004-05-04
Classification: B29C,B29D,C08F,G02B

Abstract:
A process for making a plastic eyeglass lens using a composition comprising a photoinitiator, an aromatic containing bis(allyl carbonate)-functional monomer, and at least one polyethylenic-functional monomer containing at least two ethylenically unsaturated groups selected from acrylyl and methacrylyl, the process comprising:placing a lens forming composition into a mold cavity formed at least in part by a first mold member with a casting face and a noncasting face, and a second mold member with a casting face and a noncasting face, the composition comprising a photoinitiator, an aromatic containing bis(allyl carbonate)-functional monomer, and at least one polyethylenic-functional monomer containing at least two ethylenically unsaturated groups selected from acrylyl and methacrylyl, and wherein the composition is curable by exposure to ultraviolet light to form a substantially clear eyeglass lens in a time period of less than one hour; curing the lens forming composition to form a substantially clear eyeglass lens by exposing the composition to ultraviolet light for a time period of less than one hour; and cooling at least a portion of the mold cavity, the cooling being conducted while the lens forming composition is curing.