Nitrogen-silicon-phosphorus modified lignin flame retardant as well as preparation method and application thereof

The invention discloses a nitrogen-silicon-phosphorus modified lignin flame retardant as well as a preparation method and application thereof, and belongs to the technical field of flame retardants. The nitrogen-silicon-phosphorus modified lignin flame retardant is prepared through a ring-opening reaction of KH560 and polyethylene polyamine, a hydrolytic polymerization reaction of a ring-opening product and lignin hydroxyl and a compound salifying reaction of phosphoric acid and a hydrolytic polymerization product in sequence, and the obtained flame retardant not only has a synergistic effect of nitrogen, silicon and phosphorus and shows a good flame retardant effect, but also has a good flame retardant effect. Moreover, the PC/ABS composite material has better interfacial compatibility with PC/ABS (polycarbonate, acrylonitrile-butadiene-styrene copolymer and mixture), and the mechanical property of the PC/ABS composite material can be obviously improved. 本发明公开了一种氮硅磷改性木质素阻燃剂及其制备方法和应用，属于阻燃剂技术领域。本发明依次通过KH560与多乙