Flame-retardant detachable carbon dioxide-based polyurethane heat-conducting structural adhesive as well as preparation method and application thereof

By using materials such as carbon dioxide copolymer polyols and structural regulators in polyurethane thermally conductive structural adhesives, the problems that traditional polyurethane structural adhesives cannot meet the requirements and are difficult to disassemble in high thermal conductivity applications, and the comprehensive performance of high thermal conductivity, flame retardancy and removability are achieved.

CN119709086AActive Publication Date: 2025-03-28GUANGZHOU JOINTAS CHEM
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Patent Information

Application Number
CN202411980548.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-28
Estimated Expiration
2044-12-31

AI Technical Summary

Technical Problem

Traditional polyurethane structural adhesives cannot meet the requirements in high thermal conductivity applications of new energy vehicles and electronic equipment, and are difficult to disassemble after bonding and packaging, resulting in difficulty in equipment repair or battery recycling.

Method used

The polyurethane thermally conductive structural glue prepared with carbon dioxide copolymer polyols introduces a large number of strong polar carbonate groups into the molecular structure, combining structural regulators and expandable microspheres to improve the bonding strength and flame retardant effect, and at the same time realize the removability of the polyurethane thermally conductive structural glue.

Benefits of technology

It realizes high thermal conductivity, excellent bonding performance, flame retardant performance and thermal removability of polyurethane thermally conductive structural adhesives, meets the needs of thermally conductive structural bonding of new energy batteries, and simplifies equipment maintenance and battery recycling processes.

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Abstract

The invention provides a flame-retardant detachable carbon dioxide-based polyurethane heat-conducting structural adhesive and a preparation method and application thereof, the polyurethane heat-conducting structural adhesive comprises a component A and a component B. The component A comprises the following raw materials: 15-40 parts of carbon dioxide copolymer polyol; 1-5 parts of a structure modifier; 70-90 parts of a first heat-conducting filler; 1 to 5 parts of expandable microspheres; the component B is prepared from the following raw materials: 10 to 20 parts of polyurethane prepolymer; 5 to 15 parts of isocyanate; 70-90 parts of a second heat-conducting filler; and 1-5 parts of a dewatering agent. The polyurethane heat-conducting structural adhesive disclosed by the invention not only has the characteristics of environment-friendly, energy-saving and renewable raw materials, but also has excellent bonding performance, high heat conductivity, flame retardance and thermal detachability, can meet the requirements of bonding, heat conductivity and flame retardance of a power battery pack structure, and can also meet the requirements of detaching and recycling batteries.
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