Polysiloxane prepolymers for biomedical devices
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United States of America Patent
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Dec 15, 2009
Grant Date -
Jun 29, 2006
app pub date -
Dec 2, 2005
filing date -
Dec 29, 2004
priority date (Note) -
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Abstract
A polysiloxane prepolymer that is useful for forming biomedical devices has the formula: M(*Dii*PS).sub.x*Dii*M (I) wherein: each M is independently a polymerizable ethylenically unsaturated radical; each Dii is independently a diradical residue of a diisocyanate; each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine; each * is independently --NH--CO--NH--, --NH--COO-- or --OCO--NH--; and x is at least 2.
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