Hydrogel from polysiloxane-containing urethane prepolymer, tris (trimethylsiloxy) silylpropyl methacrylate, and a hydrophilic comonomer

摘要

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.