Shaped hydrogel articles

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B - Operations, Transporting

29

D

18/106

B29D 11/00 (2006.01) C08F 2/06 (2006.01) C08J 3/03 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1242856

Shaped Hydrogel Articles Abstract A method for forming shaped hydrogel articles such as soft contact lenses wherein hydrophilic monomers are mixed with an inert diluent prior to polymerization, and the diluent is replaced with water following the polymerization. Diluents yielding optically clear hydrogels with good mechanical properties are selected on the basis of their viscosity and their Hanson cohesion parameters relative to the cohesion parameters of the polymeric component of the hydrogel.

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