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Flame Retardant Treatment of Lignocellulosic Materials, Resulting Flame-Retarded Lignocellulosic Materials, and Uses Thereof.

Abstract : The present invention relates to a flame retardant treatment of a lignocellulosic material, characterized in that it comprises the following steps: - optionally steam explosion of the lignocellulosic material, - impregnation of the optionally steam-exploded lignocellulosic material, in or with an aqueous solution comprising from 0.5% to 10% of phytic acid and from 1% to 30% of urea, and preferably from 3% to 7% of phytic acid and from 15% to 22% of urea, said percentages being expressed by weight relative to the total weight of the aqueous solution, - optionally drying of the impregnated lignocellulosic material, until it has a moisture content ranging from 5% to 20%, said percentages being expressed by weight relative to the total weight of the impregnated lignocellulosic material, - cooking of the impregnated and optionally dried lignocellulosic material, the resulting flame-retarded lignocellulosic material comprising a content of phosphorus originating from the phytic acid ranging from 0.1% to 10%, preferably ranging from 0.3% to 3%, said percentages being expressed by weight relative to the total weight of the flame-retarded lignocellulosic material. The invention also relates to the resulting flame-retarded lignocellulosic material and the use thereof for manufacturing: - flame-retarded composite materials based on plant fibres, - woven or nonwoven flame-retarded flexible materials based on plant fibres, and particularly textiles, - flame-retarded materials based on wood fibres and/or on wood particles, and particularly flame-retarded wood panels.
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https://hal.mines-ales.fr/hal-03519577
Contributor : Administrateur Imt - Mines Alès Connect in order to contact the contributor
Submitted on : Monday, January 10, 2022 - 3:19:39 PM
Last modification on : Wednesday, January 12, 2022 - 3:06:49 AM

Identifiers

  • HAL Id : hal-03519577, version 1

Citation

Nicolas Brosse, Romain Kapel, Rodolphe Sonnier, Roland El Hage, César Segovia, et al.. Flame Retardant Treatment of Lignocellulosic Materials, Resulting Flame-Retarded Lignocellulosic Materials, and Uses Thereof.. France, Patent n° : WO/2021/205128. 2021. ⟨hal-03519577⟩

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