Polysiloxane prepolymers for biomedical devices

Details Polysiloxane prepolymers for biomedical devices Polysiloxane prepolymers for biomedical devices

2005-12-02

2009-12-15

Gulakowski, Randy (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S107000, C528S028000, C528S044000, C528S045000, C428S446000, C428S447000

Reexamination Certificate

active

07632876

ABSTRACT:
A polysiloxane prepolymer that is useful for forming biomedical devices has the formula:in-line-formulae description="In-line Formulae" end="lead"?M(*Dii*PS)x*Dii*M  (I)in-line-formulae description="In-line Formulae" end="tail"?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—; andx is at least 2.

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