Jukka Tuominen,Amaia Zurutuza,Mark Livingstone,Janet Anne Halliday
申请号：
US12307514
公开号：
US08974813B2
申请日:
2007.06.27
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A water-swellable linear polymer is made by reacting together a polyethylene oxide of number average molecular weight less than 4,000, an aliphatic diol, and a difunctional diisocyanate. Controlled release composition comprises the polymer together with an active agent. The polymer is able to take up pharmaceutically active agents of molecular weight 200 to 20,000.
