| abstract |
Polysiloxane prepolymers useful for making biomedical devices are those of formula (I): M ( * Dii * PS) x * Dii * M where each M is independently a polymerizable ethylene-based polymer. A saturated radical, each Dii is independently a diradical residue of a diisocyanate, each PS is independently a diradical residue of a polysiloxane-diol or -diamine, and each * is independently -NH-CO- NH—, —NH—COO— or —OCO—NH—, and x is at least 2. |