Hydrogels of hydrophilic polyurethane (meth)acrylates

Details Hydrogels of hydrophilic polyurethane (meth)acrylates Hydrogels of hydrophilic polyurethane (meth)acrylates

2011-05-24

2011-05-24

Lewis, Kim M (Department: 3772)

Surgery: splint, brace, or bandage

Bandage structure

Skin laceration or wound cover

C424S443000, C424S445000, C604S304000, C604S308000

Reexamination Certificate

active

07947863

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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