PROCESS FOR THE PREPARATION OF AMPHIPHILIC POLY (N-VINYL-2-PYRROLIDONE) BLOCK COPOLYMERS

摘要

The instant invention provides a two-step polymerization process for prepari ng amphiphilic poly(N-vinyl-2 pyrrolidone), (PVP)-block-polyester copolymers an d other diblock and triblock copolymers consisting of PVP as one block. The block copolymers of the invention can be used as vehicles for drug delivery.