Method for producing high molecular weight polyester

一种生产高分子量聚酯的方法

Abstract

The invention discloses a method for producing high molecular weight polyester, comprising: firstly PTA is matched with glycol for obtaining slurry and later a prepolymer raw material is obtained by esterification and polycondensation; next, the prepolymer raw material is cut into small particle slices which are firstly pre-crystallized for 10-40min at 150-190 DEG C and then crystallized for 10-40min at 170-210 DEG C for a second time; finally, polycondensation is carried out to the crystallized slices for 12-60h within the scope of 200-240 DEG C by using a method of increasing the temperature gradually by section or step and the high molecular weight polyester is obtained. The method can significantly improve the solid-phase polycondensation reaction rate, shorten the reaction time, and improve the production capacity.
本发明公开了一种生产高分子量聚酯的方法,包括先将PTA与乙二醇配成浆料,经酯化、缩聚得到预聚体原料;再将预聚体原料切成小粒子切片,小粒子切片先在150~190℃下预结晶10~40min,然后在170~210℃下二次结晶10~40min;最后将结晶后的切片在200~240℃范围内采用逐段或逐步升温的方法进行缩聚反应12~60h,得到高分子量聚酯。本发明能够大幅度提高固相缩聚反应速度,缩短反应时间,提高生产能力。

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    CN-101100504-AJanuary 09, 2008新疆屯河聚酯有限责任公司耐低压聚对苯二甲酸乙二醇酯树脂及其生产方法
    CN-1143088-AFebruary 19, 1997中国纺织大学超高分子量聚酯制备方法

NO-Patent Citations (0)

    Title

Cited By (0)

    Publication numberPublication dateAssigneeTitle