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    • 8. 发明授权
    • Process for producing poly(1,4-cyclohexylenedimethylene 1,4-cyclohexanedicarboxylate) and the reactor grade polyester therefrom
    • 聚(1,4-环己烯二亚甲基1,4-环己烷二羧酸酯)和反应器级聚酯的方法
    • US06458915B1
    • 2002-10-01
    • US09764931
    • 2001-01-18
    • Donna Rice Quillen
    • Donna Rice Quillen
    • C08G6400
    • C08G63/82C08G63/199C08G63/78
    • In a process for producing a reactor grade polyester, a poly(1,4-cyclohexylenedimethylene 1,4-cyclohexanedicarboxylate) has a reduced amount of isomerization of the trans-isomer to the cis-isomer of 1,4-dimethylcyclohexanedicarboxylate and an increased polymerization rate by the addition of a phosphorus-containing compound to the reaction process. In step (a) of the process, a diacid comprising at least 80 mole percent 1,4-cyclohexanedicarboxylic acid or an ester derivative of the diacid comprising at least 80 mole percent 1,4-dimethylcyclohexanedicarboxylate is reacted with a glycol comprising at least 80 mole percent 1,4-cyclohexanedimethanol at a temperature sufficient to effect esterification for the diacid or transesterification for the ester derivative. In step (b), the product of step (a) is subjected to temperatures and pressures in the presence of a suitable catalyst to effect polycondensation. Phosphorus in an amount of 1 to 800 ppm is added in the form of a phosphorus-containing compound during the process.
    • 在制备反应器级聚酯的方法中,聚(1,4-环己烯二亚甲基1,4-环己烷二羧酸酯)具有减少的反式异构体向1,4-二甲基环己烷二羧酸酯的顺式异构体的量和增加的聚合 通过向反应过程中加入含磷化合物的速率。 在该方法的步骤(a)中,将包含至少80摩尔%1,4-环己烷二羧酸的二酸或包含至少80摩尔%1,4-二甲基环己烷二羧酸酯的二酸的酯衍生物与包含至少80 摩尔百分比的1,4-环己烷二甲醇在足以实现酯衍生物的二酸或酯交换的酯化反应的温度下进行。 在步骤(b)中,步骤(a)的产物在合适的催化剂存在下进行温度和压力以进行缩聚反应。 在该过程中以含磷化合物的形式加入1至800ppm的量的磷。