Hydrogel from polysiloxane-containing urethane prepolymer, tris (trimethylsiloxy) silylpropyl methacrylate, and a hydrophilic comonomer
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United States of America Patent
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Feb 22, 2005
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N/A
app pub date -
Oct 22, 2002
filing date -
Jun 7, 1989
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Expired
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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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