Patent ID: 6592899
Filing Date: 2003-07-15
Classification: A61K,C08L

Abstract:
A polymeric composition having improved capability of solubilizing a drug in a hydrophilic environment, comprising:1) a biodegradable polyester oligomer having a weight averaged molecular weight of between 400 and 10,000 daltons; and 2) a biodegradable AB-type, ABA-type, or BAB-type block copolymer, comprising: i) 50.1 to 65% by weight of a biodegradable, hydrophobic A polymer block comprising a biodegradable polyester, and ii) 35 to 49.9% by weight of a hydrophilic B polymer block comprising a polyethylene glycol (PEG), and wherein the block copolymer has a weight averaged molecular weight of between 2400 to 4999 daltons, wherein said composition is soluble in aqueous environment.