Provided is a method for producing a non-colored polyester with a high molecular weight. The method is to produce a polyester represented by a general formula (2). This method comprises: a first step of heating, under the presence of an antimony catalyst, a compound represented by the general formula (1) at a heating temperature in a range of from a melting point of the compound to a temperature that is 10°C higher than the melting point; and a second step of heating a solid product or viscous product obtained after the first step at a heating temperature in a range of from the melting point of the compound represented by the general formula (1) to 270°C. In the general formula (1), Z represents a divalent hydrocarbon group having 1 to 12 carbon atoms; R1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a phenyl group; R2 represents a methyl group or an ethyl group; and m represents an integer of 0 to 2. In the general formula (2), Z, R2 and m are defined as above in the general formula (1), and n represents an average repeating unit number satisfying n=10 to 600.
本发明提供了一种生产高分子量无色聚酯的方法。该方法用于生产通式(2)所代表的聚酯。该方法包括:第一步,在
锑催化剂存在下,加热通式(1)所代表的化合物,加热温度范围从化合物的熔点到比熔点高 10°C 的温度;第二步,加热第一步后得到的固体产品或粘稠产品,加热温度范围从通式(1)所代表的化合物的熔点到 270°C。在通式(1)中,Z 代表具有 1 至 12 个碳原子的二价烃基;R1 代表氢原子、具有 1 至 6 个碳原子的烷基或苯基;R2 代表甲基或乙基;m 代表 0 至 2 的整数。在通式(2)中,Z、R2 和 m 的定义与通式(1)中的定义相同,n 代表满足 n=10 至 600 的平均重复单元数。