Patent ID: 8440738
Filing Date: 2013-05-14
Classification: C08F,G02B,G02C,Y10T

Abstract:
1. A silicone hydrogel material having oxygen permeability greater than 45 Barrers, a water content greater than 60% by weight, and a modulus less than 1.0 MPa, and including a copolymer comprising: a silicon-containing monomer in an amount greater than 25% by weight; a hydrophilic substituted N-vinyl acetamide monomer in an amount greater than 30% by weight; a hydrophilic non-acetamide monomer in an amount resulting in a hydrophilic substituted N-vinyl acetamide monomer to hydrophilic non-acetamide monomer weight to weight ratio of greater than 2.1 to 1.