一种高分子量聚酯的制备方法
By adding a specific solid-phase promoter to the prepolymer melt and combining it with a low-temperature solid-phase chain-promoting reaction, the problems of slow speed and dark color in the melt-solid-phase polycondensation method were solved, enabling the rapid preparation of high intrinsic viscosity light-colored polyesters and reducing production costs and equipment investment.
CN122404686APending Publication Date: 2026-07-17ZHEJIANG UNIV
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG UNIV
- Filing Date
- 2026-06-18
- Publication Date
- 2026-07-17
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Figure CN122404686A_ABST
Abstract
本发明公开一种高分子量聚酯的制备方法，包括步骤：使使含聚酯单体和催化剂的原料反应得到预聚物；向熔融态预聚物加入固相促进剂再经干燥、预结晶后固相增黏，得到所述高分子量浅色泽聚酯；所述固相促进剂选自三酸酐、四酸二酐、二恶唑啉、二环氧化物中的一种或多种。本发明通过熔融缩聚和固相促进剂存在下的固相增黏相结合，固相增黏过程除发生固相缩聚之外，还存在增强的酯化和固相扩链反应，并采用高效、高选择性的催化剂，可显著缩短固相增黏时间，提高聚酯特性黏数，并有效抑制其变色，快速制备出高特性黏数浅色泽的聚酯。
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