Patent ID: 7632876
Filing Date: 2009-12-15
Classification: A61L,C08F,C08G,C08L,G02B,Y10T

Abstract:
1. A hydrogel copolymer that is the hydrated polymerization product of a monomeric mixture comprising a prepolymer represented by the general formula: wherein: each M is independently a polymerizable ethylenically unsaturated radical; each Dii is independently a diradical residue of a diisocyanate; each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine; each * is independently —NH—CO—NH—, —NH—COO— or OCO—NH—; and x is at least 2, and a hydrophilic comonomer, and wherein the hydrogel copolymer has sufficient optical quality and an oxygen permeability of at least 150 barrers.