Hydrophilic copolymer suitable above all for contact lenses and medical purposes and a method of its preparation

Abstract From the Canadian patent

The invention relates to a hydrophilic copolymer particularly suitable for contact lenses and other medical applications, which copolymer is prepared by copolymerization of 10 to 90 wt.%, preferably 40 to 80 wt.% of a, monomer of the general formule I (I), where n is 1 or 2, with 90 - 10 wt.% preferably 60 to 20, wt.%, of 2-hydroxyethyl methacrylate and 0.01 to 2 wt.% of at least one crosslinking agent having at least two olefinic double bonds, in the presence of a radical initiator.