A bio-based flame retardant, a preparation method thereof and a bio-based flame-retardant TPU material

By introducing a multilayer self-assembled flame retardant consisting of chitosan microspheres and ammonium polyphosphate into TPU material, the problems of heat transfer and smoke release during combustion of TPU material were solved, achieving good flame retardant effect and improved mechanical properties.

CN117362764BActive Publication Date: 2026-05-26NINGBO JIANFENG NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO JIANFENG NEW MATERIALS CO LTD
Filing Date
2023-08-30
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing TPU materials exhibit rapid flame propagation, intense heat release, production of large amounts of toxic gases, and dripping during combustion. Furthermore, existing flame retardants cannot effectively suppress smoke release or improve mechanical properties.

Method used

This bio-based flame retardant uses chitosan microspheres as its core and is constructed by layering ammonium polyphosphate and chitosan layers into a multi-layer self-assembled structure. The carbon source of chitosan and the acid source of ammonium polyphosphate form an expansion layer during combustion, which inhibits heat transfer and the generation of combustible gases, thereby enhancing the flame retardant effect.

Benefits of technology

It effectively inhibits heat transfer and combustible gas generation during TPU combustion, improves the flame retardant and mechanical properties of the material, and forms a stable expanded carbon layer to isolate heat and smoke.

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Abstract

This invention belongs to the field of polymer materials technology, specifically relating to a bio-based flame retardant, its preparation method, and a bio-based flame-retardant TPU material. The bio-based flame retardant comprises a multi-layered self-assembled flame retardant structure with chitosan microspheres as the core, layered with ammonium polyphosphate and chitosan layers. The flame retardant, with chitosan microspheres as the core, forms a multi-layered self-assembled flame retardant structure through the mutual electrostatic interaction between the chitosan microspheres and ammonium polyphosphate. When added to TPU material, it exhibits good compatibility with TPU material, and the resulting bio-based flame-retardant TPU material possesses excellent mechanical and flame-retardant properties.
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Citation Information

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