Vinyl resin sizing agent as well as preparation method and application thereof

By reacting epoxy resin with 3-mercaptopropionic acid and other compounds to form sulfhydryl bonds and unsaturated double bonds, a modified epoxy resin sizing agent was prepared, which solved the problem of degradation of interface performance of vinyl ester resin composite materials, and achieved high Production of carbon fiber composites with strength, low cost and rapid molding.

CN119321059AActive Publication Date: 2025-01-17WUHAN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411446569.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-16
Publication Date
2025-01-17
Estimated Expiration
2044-10-16

AI Technical Summary

Technical Problem

In the prior art, the radical polymerization of vinyl ester resin during curing leads to different polymerization mechanisms from epoxy resins and large structural differences, resulting in significant reduction in the interface performance and mechanical properties of carbon fiber reinforced vinyl resin composites, and it is necessary to prepare suitable materials. Water-soluble sizing agent of vinyl ester resin to improve interfacial performance.

Method used

By reacting epoxy resin with compounds such as 3-mercaptopropionic acid, sulfoxide chloride and triethylamine, a sulfhydryl bond and an unsaturated double bond are generated, and a modified epoxy resin sizing agent is prepared by combining a softener and a penetrant to prepare a modified epoxy resin sizing agent. , and mixed with water to form a vinyl resin sizing agent to improve the interfacial bonding strength between carbon fiber and resin.

Benefits of technology

It significantly improves the interface bonding strength between carbon fiber and resin, reduces the forming time of composite materials, reduces the fixed asset investment of equipment, achieves low cost and rapid molding, and improves flexibility, meeting the performance requirements of marine materials.

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Abstract

The invention relates to the technical field of sizing agent preparation, and discloses a vinyl resin sizing agent as well as a preparation method and application thereof. A thiol group in 3-mercaptopropionic acid reacts with an epoxy group in epoxy resin to generate a thioether bond, so that the epoxy group is subjected to ring opening, and unsaturated double bonds are introduced into the epoxy resin through a series of chemical modification treatment, so that the epoxy resin is prepared. The unsaturated double bond can be chemically crosslinked with a double bond in a vinyl ester resin or unsaturated polyester resin molecular chain in a curing process, so that chemical bond connection is formed between the carbon fiber and a resin matrix, and the interface bonding strength of the composite material is obviously improved.
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Citation Information

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