A curing agent mixture and an epoxy resin containing the same

By leveraging the synergistic effect of the curing agent (TETA-VAN) generated from the reaction of triethylenetetramine and vanillin, and triethanolamine, combined with a low-temperature, staged curing process, the balance between high initial strength, multiple repairs, and environmental stability of self-healing epoxy resin materials was resolved, achieving efficient and stable self-healing performance.

CN122127576APending Publication Date: 2026-06-02SHANDONG NON METALLIC MATERIAL RESEARCH INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG NON METALLIC MATERIAL RESEARCH INSTITUTE
Filing Date
2026-04-17
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing self-healing epoxy resin materials struggle to balance high initial strength, multiple repair capabilities, mild repair conditions, and environmental stability. In particular, the hydrolysis of dynamic bonds has not been effectively addressed, leading to a decline in material performance in humid environments.

Method used

The curing agent (TETA-VAN) generated by the reaction of triethylenetetramine and vanillin is combined with triethanolamine as an additive. Through a low-temperature staged curing process, a dynamic crosslinking point with high crosslinking density and uniform distribution is formed. Triethanolamine acts as an imine hydrolysis inhibitor to ensure the stability of the material in a humid environment.

Benefits of technology

It achieves high initial strength, multiple repair capabilities, and environmental stability. The material maintains excellent mechanical properties and repair efficiency in humid environments and is suitable for long-term use in complex environments.

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Abstract

The application belongs to the technical field of new materials, and specifically provides a curing agent mixture and an epoxy resin using the curing agent mixture. First, an aromatic compound containing an aldehyde group is used to prepare a curing agent together with a polyamine compound, then the curing agent is used for curing the epoxy resin, and triethanolamine is used as an additive in the curing process, which can act as a curing accelerator, a toughening agent and an imine hydrolysis inhibitor, so that the finally obtained epoxy resin has high initial performance, high repair performance and high environmental stability. When the epoxy resin is repaired, no solvent, catalyst or complex equipment is needed, and the repair can be completed only by heating, which is simple to operate and has wide applicability.
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