Single-component high-temperature-resistant pre-coated thread locking adhesive and preparation method thereof

By employing a dual-insurance design of modified epoxy resin microcapsules and curing agent microcapsules, the problems of temperature resistance and storage stability of epoxy pre-coated threadlocking adhesive in high-temperature environments are solved, achieving a stable fastening effect for fasteners in high-temperature scenarios.

CN122168212APending Publication Date: 2026-06-09SHANDONG NORTH MODERN CHEM IND
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG NORTH MODERN CHEM IND
Filing Date
2026-03-30
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing epoxy pre-coated threadlocking adhesives have insufficient temperature resistance and poor storage stability in high-temperature environments, resulting in insufficient loosening torque strength to meet the requirements of high-temperature scenarios, and the adhesive is prone to gelation and failure.

Method used

The design employs a dual-insurance approach, combining modified epoxy resin microcapsules and epoxy curing agent microcapsules. The microcapsule wall material is formed through the copolymerization reaction of epoxy resin modified with terminal epoxy siloxane and styrene acrylate, which physically isolates the modified epoxy resin and curing agent, resulting in a single-component, high-temperature resistant pre-coated threadlocking adhesive.

Benefits of technology

It significantly improves the loosening torque strength and bonding strength of fasteners in high-temperature environments, extends storage stability, avoids adhesive gel failure, and meets the usage requirements of high-temperature scenarios such as automotive engines and aerospace.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure SMS_1
    Figure SMS_1
Patent Text Reader

Abstract

This invention discloses a single-component high-temperature resistant pre-coated threadlocking adhesive and its preparation method, relating to the field of threadlocking adhesive technology. It comprises modified epoxy resin microcapsules, epoxy curing agent microcapsules, accelerators, and film-forming agents. This invention uses organosiloxanes to chemically modify epoxy resin and uses the modified epoxy resin as the core material to prepare modified epoxy resin microcapsules. After curing, these microcapsules significantly improve the loosening torque strength of fasteners under high-temperature conditions. Simultaneously, the epoxy curing agent is also encapsulated within the microcapsules, forming a dual-capsule system, providing double physical isolation and significantly improving the storage stability of the pre-coated adhesive. This effectively avoids the problem of easy gelation and failure in traditional single-component epoxy pre-coated adhesives. Furthermore, the dual-capsule system prevents side reactions between the reacting components and external substances, ensuring that when the microcapsules are squeezed and ruptured during fastener installation, the modified epoxy resin and curing agent can fully react to achieve the designed locking strength.
Need to check novelty before this filing date? Find Prior Art