Fire-resistant cellulosic material

摘要

A new approach for improving fire resistance of cellulosic materials is provided, especially when the cellulosic material is to be used in polymer composites. Cellulosic material is treated with an aqueous mixture of alkali metal or ammonium hydroxide and alkaline earth or aluminum metal salt simultaneously with or within a short period of time of preparing the mixture. The treated cellulosic material becomes self-extinguishing and may also have improved thermal stability, improved interfacial thermal resistance, improved resistance to damage by oxidants and other chemical agents, improved resistance to biological agents and/or improved resistance to damage by ultra-violet light.

主权项

1. A process of producing a fire-resistant cellulosic material comprising:
treating a cellulosic material with an aqueous reaction mixture of an alkali metal or ammonium hydroxide and an alkaline earth or aluminum metal salt, wherein the treating is done simultaneously with or in 1 day or less of mixing the alkali metal or ammonium hydroxide and alkaline earth or aluminum metal salt; and, drying the treated cellulosic material.