Patent ID: 8703891
Filing Date: 2014-04-22
Classification: C08F,G02B

Abstract:
1. A method of making a contact lens comprising the steps of: mixing: A) at least 10 weight percent, based on the total composition weight excluding solvent, of at least one silicone-containing monomer of the formula I: where n is from 1 to 3, m is from 9 to 15, each a independently is C B) at least 10 weight percent, based on the total composition weight excluding solvent, of 3-methacryloxypropyl tris(trimethylsiloxy)silane; C) N-vinyl pyrrolidone; and D) at least one other non-ionic hydrophilic monomer, wherein the combined amount of A) and B) is at least 20 weight percent based on the total composition weight excluding solvent, wherein the N-vinyl pyrrolidone (NVP) is present in such an amount that the reaction product comprises polyvinyl pyrrolidone (PVP) homopolymer; and wherein the reaction mixture is in the absence of pre-polymerized PVP homopolymer; and curing the mixture to form a PVP-containing contact lens.