Hydrophilic copolymers, the use thereof as biomedical...

Details Hydrophilic copolymers, the use thereof as biomedical... Hydrophilic copolymers, the use thereof as biomedical...

C - Chemistry, Metallurgy

08

F

402/403, 204/91.

C08F 226/10 (2006.01) B29D 11/02 (2006.01) C08F 220/12 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1249098

Hydrophilic copolymers, the use thereof as biomedical materials and contact-optical articles produced therefrom A B S T R A C T The invention relates to new cross-linked copolymers of N-vinyl pyrrolidone, N-alkyl-N-vinyl carboxylic acid amides, methacrylates and optionally further copolyme- rising monomers of a specific composition. The copolymers have a water absorption capacity of up to about 80% by weight, based on the hydrated state, and are suitable for the production of shaped articles which are in contact with living tissue in use. Examples include soft contact lenses and scleral lenses of high mechanical strength, in particular thin to very thin lenses for prolonged wear.

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