| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel catalyst for a polycondensation reaction other than an antimony compound and a polyester manufactured by using the catalyst. SOLUTION: A novel catalyst composed of an aluminum compound and a phosphorous compound having a phenol portion in the same molecule is used as a catalyst for a polycondensation reaction in producing a polyester, wherein the phosphorous compound is one or more selected from the group consisting of a phosphonic acid-based compound, a phosphinic acid-based compound, a phosphinic oxide-based compound, a phosphonous acid-based compound, a phosphinous acid-based compound and a phosphine-based compound.
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