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US 2006/0142526 A1Published application
Polysiloxane prepolymers for biomedical devices
AssigneeBausch & Lomb Incorporated
InventorsYu-Chin Lai, Weihong Lang, Edmond Quinn
Life of this patent
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Abstract
A polysiloxane prepolymer that is useful for forming biomedical devices has the formula: M(*Dii*PS)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.
Claims25
A prepolymer represented by the general formula:
- M(*Dii*PS)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.
5 more elements
Dependencies are inferred from the claim text.