Preparation of polyesters comprising 2,5-furandicarboxylate units with germanium catalysts

By optimizing the preparation process using germanium catalysts and DEG inhibitors, the problem of preparing high molecular weight and optically good 2,5-furan dicarboxylic acid ester unit polyesters in existing technologies has been solved, achieving efficient and environmentally friendly polyester production.

CN115989263BActive Publication Date: 2026-07-03FURANIX TECH BV
View PDF 11 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FURANIX TECH BV
Filing Date
2021-08-27
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies make it difficult to prepare high-molecular-weight polyesters containing 2,5-furan dicarboxylic acid ester units with good optical properties in a short time, and traditional catalysts may lead to side reactions or be environmentally unfriendly.

Method used

Polyesters were prepared under polycondensation conditions using a germanium-containing catalyst and a specific DEG inhibitor. The amount of catalyst was controlled and reaction parameters, such as temperature and pressure, were optimized. Solid-state polymerization was then used to improve molecular weight and optical properties.

Benefits of technology

High molecular weight polyesters containing 2,5-furan dicarboxylic acid ester units can be prepared in a short time. These polyesters have low absorbance and limited haze, are environmentally friendly, and are suitable for packaging applications in transparent materials.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure BDA0004094611100000111
    Figure BDA0004094611100000111
  • Figure BDA0004094611100000112
    Figure BDA0004094611100000112
  • Figure BDA0004094611100000121
    Figure BDA0004094611100000121
Patent Text Reader

Abstract

A process for preparing a polyester comprising 2,5-furan dicarboxylic acid ester units, the process comprising subjecting a starting composition comprising 2,5-furan dicarboxylic acid and an aliphatic diol to esterification conditions to produce an ester composition and contacting the ester composition with a germanium-containing solution under polycondensation conditions to produce a polyester comprising 2,5-furan dicarboxylic acid ester units, wherein the polyester comprising 2,5-furan dicarboxylic acid ester units comprises 5 ppm to 100 ppm of germanium and has a number-average molecular weight of at least 30 kg / mol.
Need to check novelty before this filing date? Find Prior Art