High-ductility high-diffusion PC/ABS alloy material and preparation method thereof

The invention aims to provide a high-ductility high-diffusion PC/ABS alloy material and a preparation method thereof. The alloy material comprises the following components in percentage by weight: 5-15 percent of ABS resin, 1-3 percent of a PC/ABS compatilizer, 0.1-2 percent of a light diffuser, 0.1-0.5 percent of a dispersing agent, 0.2-0.6 percent of an anti-oxidant and the balance of PC resin, and further comprises other additives (white powder and brightening agents). The preparation method comprises the following steps: all components are mixed in a high-speed mixer for 1-2 min, and then the mixture is put in a double-screw extruder for extrusion and pelletization, thereby obtaining the alloy material. The prepared PC/ABS alloy material is high in light transmittance and diffusibility through reasonable matching ratio of PC resin and ABS resin and the using of the light diffuser. Meanwhile, the PC machinability is greatly improved and internal stress cracking problem is solved through the adding of a toughening agent and the ABS resin. The alloy material can replace a light diffusion PC and light diffusion ABS material to be applied in the optical field, and overcome the difficulty that the light diffusion PC and light diffusion ABS material can not be used in severe conditions (for example: work piece is punched with a self-tapping screw and required to be in contact with strong acid and strong alkali).