Hydrophilic copolymers

Details Hydrophilic copolymers Hydrophilic copolymers

C - Chemistry, Metallurgy

08

L

400/3024, 88/40

C08L 39/06 (2006.01) C08L 33/10 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01)

Patent

CA 1080888

ABSTRACT OF THE DISCLOSURE A hydrophilic copolymer suitable for contact lenses consisting essentially of copolymerised N-vinyl-2-pyrrolidone and methyl methacrylate in a molar ratio of from about 6:1 to about 1:1 and including (i) a minor amount of at least one cross-linking agent containing at least two olefinic bonds per molecule and (ii) a minor amount of an ethylene oxide - propylene oxide block copolymer having a molecular weight of not more than about 6,000.

279514

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