High-toughness and high-strength polypropylene composition, and preparation method thereof

The invention discloses a high-toughness and high-strength polypropylene resin composition. The resin composition comprises (calculated as the weight of the polypropylene): (1) 100% of the polypropylene; (2) 9-18% of carboxylic styrene butadiene latex modified powder styrene butadiene rubber; (3) 13-24% of a functionalized inorganic filler; (4) 5-10% of grafted polypropylene. The functionalized inorganic filler is prepared through common treatment by a coupling agent and carboxylic latex. According to the present invention, compared to the polypropylene base material, the impact resistance of the polypropylene resin composition is improved by more than 10 times, the strength of the polypropylene resin composition is improved by more than 50%, and the rigidity is maintained; the production method for the composition has advantages of short process, simple technology, easily controllable technology condition and the like; the prepared polypropylene composition can widely replace ABS and other engineering materials, and is applicable for preparing the large-scale thin-walled product. The invention further discloses a preparation method for the composition.