Patent ID: 9155722
Filing Date: 2015-10-13
Classification: A61K,A61P

Abstract:
1. An AB-, ABA-, or BAB-block copolymer composition, said block copolymer comprising: at least a first AB, ABA, or BAB block copolymer component comprising a first hydrophobic A-block and a first hydrophilic B-block, wherein the first hydrophobic A-block is a biodegradable polyester comprising about 60% to 95% caprolactone by mole percent and at least one second polyester-forming monomer, and the first hydrophilic B-block has a first average molecular weight and comprises polyethylene glycol; at least a second AB, ABA, or BAB block copolymer component comprising a second hydrophobic A-block and a second hydrophilic B-block, wherein the second hydrophobic A-block comprises biodegradable polyester, and the second hydrophilic B-block has a second average molecular weight and comprises polyethylene glycol, wherein the second average molecular weight is different from the first average molecular weight;