<p>A bioresorbable polymer is obtained by reacting together (a) a prepolymer comprising co-polymerised units of a caprolactone and poly(alkylene oxide) moieties; (b) a polycapro lactone diol comprising co-polymerised units of a caprolactone and a C<SUB>2</SUB>-C<SUB>6</SUB> diol; and (c) a diisocyanate. The polymer may be loaded with a pharmaceutically active agent to produce a drug delivery device.</p>
