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US 2008/0177213 A1Published application
Hydrogels of hydrophilic polyurethanes (meth)acrylates
AssigneeBayer Material Science AG
InventorsBurkhard Kohler, Michael Mager
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Abstract
The present invention provides hydrogels formed from polyurethane (meth)acrylates in water using water-soluble redox initiators.
Claims12
Process for preparing polyurethane hydrogels which comprises free-radically crosslinking
- A) hydrophilic polyurethanes having olefinically unsaturated groups in the presence of
- B) water and
- C) a redox system comprising 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.
Dependencies are inferred from the claim text.