| abstract |
(57) Summary [Objective] The object of the present invention is to provide a multi-use compound for use in a drug delivery matrix, which has no intramolecular cross-linking, has improved biodegradability, and is not toxic to the human body. It is to provide a block copolymer. A thermoplastic and biodegradable multi-block copolymer for a drug delivery matrix, the block (A) having hydrophilicity, non-biodegradability and swelling, and hydrophobic, biodegradable, crystalline , And a block (B) having a non-swelling property, and represented by a predetermined formula. |