Flame-retardant modified PVC (polyvinyl chloride) composite material based on graphene-coated hydroxyl magnesium-aluminum hydrotalcite LDHs (layered double hydroxides) and preparation method of flame-retardant modified PVC composite material

Through the method of graphene coated with hydroxymagnesium aluminum hydrotalcite LDHs, the problems of PVC material degradation and poor dispersion of flame retardant are solved, which significantly improves the mechanical and thermal stability of PVC, and achieves the improvement of flame retardant performance and flame retardant. evenly dispersed.

CN119286165AActive Publication Date: 2025-01-10ANHUI YAEN NEW MATERIAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411588515.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-08
Publication Date
2025-01-10
Estimated Expiration
2044-11-08

AI Technical Summary

Technical Problem

PVC materials are prone to degradation during processing, have poor thermal stability, and traditional flame retardants are difficult to disperse in polymers, resulting in reduced flame retardant efficiency and prone to failure.

Method used

The flame retardant modified PVC composites are prepared using graphene coated with hydroxymagnesium aluminum hydrotalcite LDHs. Through a series of steps, the preparation of graphene oxide, reduced graphene oxide, nanomesoporous silica and rare earth-doped modified hydrotalcite The filler is loaded with a flame retardant in combination with an impregnation method and coated with a polyacrylate organic film to form a composite modified filler and mix with PVC.

Benefits of technology

It significantly improves the mechanical strength, thermal stability and flame retardant properties of PVC, achieves the uniform dispersion and sustained release of flame retardant, and enhances the comprehensive performance of PVC.

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Abstract

The invention discloses a flame-retardant modified PVC (polyvinyl chloride) composite material based on graphene-coated hydroxyl magnesium-aluminum hydrotalcite LDHs (layered double hydroxides) and a preparation method of the flame-retardant modified PVC composite material. The method comprises the following steps: S1, preparing hydrotalcite-based filler based on graphene-coated hydroxyl magnesium-aluminum hydrotalcite LDHs: S1-1, preparing graphene oxide GO; s1-2, preparing reduced graphene oxide r-GO; s1-3, preparing a hydrotalcite-based filler by a one-pot method; s2, loading a flame retardant on the hydrotalcite-based filler through an impregnation method to obtain a flame-retardant modified filler; s3, coating the flame-retardant modified filler with a polymer to obtain a composite modified filler; s4, mixing the composite modified filler, a stabilizer, a plasticizer and PVC to obtain the flame-retardant modified PVC composite material. The PVC composite material provided by the invention has excellent mechanical strength and thermal stability, and also has excellent flame retardant property and smoke suppression effect.
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Citation Information

Patent Citations

  • A high temperature resistant flame retardant PVC material and preparation method thereof

    CN117777615B

  • PVC material containing flame retardant plasticizer and preparation method thereof

    CN118344686B

  • A highly flame-retardant and heat-stable modified polyvinyl chloride material and a preparation method thereof

    CN118388902B

  • High-performance electric-wire compound stabilizer based on graphene modification

    CN107057167A

  • Graphene flame-retardant plastic masterbatch and preparation method

    CN108727526A

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