| abstract |
PROBLEM TO BE SOLVED: To provide an aliphatic polyester having a high degree of polymerization and excellent thermal stability and an industrially advantageous and efficient production method thereof. In producing a polyester having a diol unit and an aliphatic dicarboxylic acid unit, as a catalyst, at least one element selected from the group consisting of metal elements belonging to Groups 3 to 6 of the periodic table, and silicon element In addition, a metal oxide containing at least one element selected from the group consisting of metal elements belonging to Groups 1, 2, 12, 13 and 14 of the periodic table is used. [Selection figure] None |