| abstract |
It is an object of the present invention to provide a novel process for producing chain and cyclic lactic acid oligomer mixtures with good efficiency. According to the present invention, a method for producing a chain and cyclic lactic acid oligomer mixture represented by the following general formula (1) or (2), characterized in that the lactide is polymerized in the presence of a compound represented by the following general formula (3). This is provided:n n n n n n n n Me-N (R 1 ) (R 2 ) (3)n n n Wheren n n m represents an integer from 1 to 30;n n n n represents an integer from 1 to 30;n n n Me represents an alkali metal; And,n n n R 1 and R 2 each independently represent an aliphatic group or an aromatic group. |