Patent ID: 9097839
Filing Date: 2015-08-04
Classification: C08F,G02B

Abstract:
1. A lens-forming composition suitable for making silicone hydrogel contact lenses according to a curing method based on a spatial limitation of actinic radiation, comprising: (1) from about 10% to about 50% by weight of at least one hydrophilic amide-type vinylic monomer; (2) from about 10% to about 40% by weight of at least one siloxane-containing (meth)acrylamide of formula (1) (3) from about 10% to about 40% by weight of a polysiloxane-containing vinylic macromere of formula (4); (4) from about 0.1% to about 1.3% by weight of a photoinitiator, and (5) from 0 to about 5% by weight of a polymerizable UV-absorbing agent or a polymerizable latent UV-absorbing agent; provided that components (1) to (5) and any additional components add up to 100% by weight, wherein if one or more methacrylate monomers are present in the lens-forming composition, the total amount of the methacrylate monomers is less than about 5% by weight, and wherein the lens forming composition is characterized by having a curing time of less than 30 seconds by a UV light having an UV-intensity of about 4.1 mW/cm