Hydrogel from polysiloxane-containing urethane prepolymer,...

Details Hydrogel from polysiloxane-containing urethane prepolymer,... Hydrogel from polysiloxane-containing urethane prepolymer,...

2005-02-22

2005-02-22

Naff, David (Department: 1651)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Implant or insert

C424S423000, C424S427000, C424S443000, C424S486000, C435S041000, C435S283100

Reexamination Certificate

active

06858218

ABSTRACT:
A polyurethane based prepolymer is provided and useful in biomedical devices which provides high oxygen permeability and superior physical properties. A hydrogel is produced from a comonomer mixture containing a polysiloxane-containing urethane prepolymer, tris(trimethylsiloxy)-silylpropyl methacrylate and a hydrophilic comonomer. The hydrogel is especially useful for biomedical materials such as contact lenses and implants.

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