Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 24, 2011
Patent Application Number
12008939
Date Filed
January 15, 2008
Patent Primary Examiner
Patent abstract
Processes for preparing polyurethane hydrogels which include free-radically cross-linking: A) hydrophilic polyurethanes having one or more olefinically unsaturated groups selected from the group consisting of acrylate and methacrylate groups; in the presence of B) water; and C) a redox system including a water-soluble oxidizing agent and a water-soluble reducing agent, the oxidizing agent being capable in terms of redox potential of reacting with the water-soluble reducing agent by free-radical formation, wherein the hydrophilic polyurethanes are based on hydroxyl-functional polyalkylene oxides.
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