Amine-catalyzed residual oligomeric ether polyol and method of making same

By leveraging the interfacial interaction and aggregation behavior between carboxylated polyether nanogel intermediates and free tertiary alcohol amine catalysts, combined with the filtration and devolatilization process, the contradiction between high catalytic activity and low residue and low odor in the preparation of polyether polyols is resolved. This achieves efficient reduction of residue and odor, improves product purity and stability, and is applicable to flexible polyurethane materials.

CN122465135BActive Publication Date: 2026-10-09JIANGSU LIHONG TECH DEV CO LTD
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Patent Information

Application Number
CN202610975766.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-07-02
Publication Date
2026-10-09
Estimated Expiration
2046-07-02

AI Technical Summary

Technical Problem

In the current process of preparing polyether polyols, high catalytic activity and high conversion rate are mutually constrained by the requirements of low free amine residue, low odor, low volatile organic compounds and low yellowing. Moreover, existing post-treatment methods for reducing residues are prone to side reactions, resulting in an increase in aldehyde and ketone byproducts, increased color and decreased odor stability.

Method used

By utilizing the interfacial interaction and aggregation behavior between carboxylated polyether nanogel intermediates and free tertiary amine catalysts, combined with the filtration and devolatilization process, the risks of residues, odors, and side reactions are reduced. Through the interfacial contact and aggregation between carboxylated polyether nanogel intermediates and free tertiary amine catalysts, the targeted capture and filtration separation of residual small molecules are achieved.

Benefits of technology

While maintaining the main structure and process window of polyether, it simultaneously reduces the risks of residue, odor and side reactions, and improves product purity and stability, making it suitable for flexible polyurethane foam, adhesives and elastomers.

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Abstract

The application belongs to the field of polyether polyol for polyurethane, and provides an amine catalytic residual low oligomer polyether polyol and a preparation method thereof. Crude polyether polyol is prepared by starting polymerization of propylene oxide with glycerol and tertiary alcohol amine catalyst, then a carboxylated polyether nanogel intermediate is introduced to contact with free tertiary alcohol amine catalyst and facilitate subsequent filtration separation, and low-tertiary alcohol amine catalyst residual polyether polyol is obtained through filtration and devolatilization, realizing low free tertiary alcohol amine catalyst residual, low moisture, low acid value, low odor and low volatile organic matter contribution, while the polymerization activity, conversion efficiency and mildness of post-treatment are considered, and the application is suitable for preparation of flexible polyurethane foam, adhesive, sealant and elastomer.
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