A low-melt-index hydrolysis-resistant polyether ester elastomer, and a preparation method and application thereof

CN122103541APending Publication Date: 2026-05-29PETROCHINA SHANGHAI ADVANCED MATERIALS RESEARCH INSTITUTE CO LTD +1
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA SHANGHAI ADVANCED MATERIALS RESEARCH INSTITUTE CO LTD
Filing Date
2024-11-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing thermoplastic polyether ester elastomers are prone to hydrolysis under humid and hot conditions, which leads to a decrease in molecular weight and a decline in mechanical properties. Furthermore, traditional anti-hydrolysis agents can affect processing stability and produce toxic odors.

Method used

By preparing hydroxyl-terminated siloxanes and polymerizing them with aromatic dicarboxylic acids or their esters, aliphatic diols and polyether diols, a low melt index hydrolysis-resistant polyether ester elastomer is formed, and the Si-O bonds in the hydroxyl-terminated siloxanes are used to improve the hydrolysis resistance.

Benefits of technology

Under high humidity conditions, the mechanical properties decrease by less than 10%, the melt index decreases, but the processing stability is not affected, and the generation of toxic odors is avoided, making it suitable for industrial production.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122103541A_ABST
    Figure CN122103541A_ABST
Patent Text Reader

Abstract

The application relates to a low-melt-index hydrolysis-resistant polyether ester elastomer and a preparation method and application thereof, and the low-melt-index hydrolysis-resistant polyether ester elastomer comprises the following raw materials: a terminal hydroxyl siloxane, aromatic dibasic acid or ester thereof, aliphatic dihydric alcohol, polyether dihydric alcohol and an auxiliary agent, and the terminal hydroxyl siloxane is prepared from tetraethyl orthosilicate and aliphatic dihydric alcohol. Compared with the prior art, the application reduces the melt index of the product from the molecular structure, improves the hydrolysis resistance of the product, the melt index of the product is 12.0-15.8 g / 10min (220 DEG C / 2.16 Kg), under the condition of 'double 85', 1000h, the mechanical property attenuation of the sample is less than 10%.
Need to check novelty before this filing date? Find Prior Art