Preparation method of ABS (acrylonitrile butadiene styrene) composition for 3D printing

The invention discloses a preparation method of ABS (acrylonitrile butadiene styrene) composition for 3D printing. The composition comprises, in parts by mass, 45-55 parts of ABS, 8-14 parts of an SEBS (styrene-ethylene-butylenes-styrene) graft, 23-34.4 parts of a PC-PPO (polycarbonate-polyphenylene oxide) segmented copolymer, 0.3-0.7 parts of an amino silane coupling agent, 5-9 parts of nano filler, 5-12 parts of glass fibers, 0.6-1.1 parts of an antioxidant and 0.3-0.7 parts of a light stabilizer. The ABS composition for 3D printing is prepared through extrusion and blending of elongational flows as well as reactive compatibilization. The composition has good melt processing stability, good tensile strength, good rigidity and good anti-impact strength, and can guarantee customization precision of printed products and product strength and guarantee that a patient uses 3D printed products safely in the recovery process when the composition is applied to 3D printing aiding medical instruments.