METHOD FOR PRODUCING POLYL-LACTIC ACID MIXTURE AND ANTITUMOR AGENT COMPRISING POLYL-LACTIC ACID MIXTURE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a polyL-lactic acid mixture having a wider distribution range of the degree of condensation than that of the conventional polyL-lactic acid mixture with reduced labor and time.;SOLUTION: The method for producing the polylactic acid mixture is characterized as follows. An aqueous solution of L-lactic acid is heated and decompressed for 7-8 h in a nitrogen atmosphere, then allowed to stand at normal temperature under atmospheric pressure for 16-19 h and further heated and decompressed for 8 h.;COPYRIGHT: (C)2005,JPO&NCIPI