| abstract |
A hydrophilic copolymer suitable for contact lenses is prepared by copolymerization of (A) 70-99.5 wt.% of diethylene glycol monomethacrylate, (B) 0.5-30 wt.% vinyl monomers selected from the group comprising esters and amides of methacrylic acid and acrylic acid, e.g. butyl methacrylate, dodecyl methacrylate, 2-ethoxyethyl methacrylate or N-t-butylacrylamide and (c) 0.01-2 wt.% of a crosslinking agent containing at least two olefinic double bonds in the molecule, e.g. ethylene glycol dimethacrylate. |