METHOD FOR PRODUCING BIODEGRADABLE ALIPHATIC POLYESTER AND/OR COPOLYMER THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a biodegradable aliphatic polyester and/or a copolymer thereof, having usefulness as a medical material or a substitute of a general purpose resin, further having sufficiently drawn out characteristics originally possessed by the biodegradable aliphatic polyester and/or the copolymer thereof by using a main raw material having a specific amount or less of the total content of organic impurities included in the raw material. SOLUTION: This method for producing the biodegradable aliphatic polyester and/or the copolymer comprises using a raw material having the total content of the organic impurities included in the raw material within a specific amount as an essential condition, and carrying out at least a part of the polymerization reaction by a solid phase polymerization reaction by using the raw material.