This work was financially supported by the natural science foundation of Liaoning province (No.20052159) and the youth science and technology foundation of Dalian, China (No.2002114). At present, flame retardant acrylonitrile-butadiene-styrene (ABS) materials containing halogen are restricted in ecological environment because they produce lots of toxic gases and corrosive smokes while burning. In view of existing situation, intumescent flame retardant (IFR) with halogen-free and low toxicity was selec...