| abstract |
A method for producing a polylactic acid-containing composition having a good hue is provided. A metal compound containing at least one metal selected from tin, aluminum, zinc, calcium, titanium, germanium, manganese, magnesium, and a rare earth element in the presence of lactide and a specific phosphorous acid compound. It is used as a catalyst and is subjected to melt ring-opening polymerization under specific conditions to obtain a polylactic acid-containing composition. [Selection figure] None |