In a preferred embodiment, the invention is a method of grafting polar groups onto biodegradable polymers and modified biodegradable polymer compositions...http://www.google.es/patents/US7053151?utm_source=gb-gplus-sharePatente US7053151 - Grafted biodegradable polymer blend compositions B???squeda avanzada de patentes N???mero de publicaci???nUS7053151 B2Tipo de publicaci???nConcesi???n N???mero