Jukka Tuominen,Amaia Zurutuza,Mark Livingstone,Janet Anne Halliday
申请号：
US12373002
公开号：
US08361272B2
申请日:
2007.06.27
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A linear polymer is obtained by reacting together a polyethylene glycol or polypropylene glycol a PEG-PPG-PEG or PPG-PEG-PPG block copolymer a difunctional amine or diol and a diisocyanate. A controlled release composition comprises the polymer together with an active agent. Active agents of molecular weight 200 to 20,000 may be used.
