| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymerization catalyst for a polyester, which comprises a main component other than an antimony or germanium compound, and is excellent in catalytic activity giving a polyester excellent in thermal stability, thermal oxidation stability and hydrolysis resistance and to provide the polyester excellent in thermal stability, thermal oxidation stability and hydrolysis resistance. SOLUTION: The polymerization catalyst for the polyester, which is characterized by containing at least one compound selected from aluminum and its compounds as a metal-containing component and at least one compound selected from metallic salts of a specific phosphorus compound, is used.
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