The invention discloses a heat-resistant
impact-resistant
polypropylene composition and a preparation method thereof, and belongs to the technical field of
polypropylene materials. The
polypropylene composite is characterized by comprising the following components in parts by weight: 100 parts of a polypropylene resin
powder, 0.03-0.3 part of a hyper-branched
polymer powder, 0.02-0.1 part of an inorganic nucleating agent, 0.05-0.3 part of an
antioxidant, 0.02-0.1 part of an acid absorbent, and 0.03-1.0 part of an
antistatic agent, wherein the polypropylene resin is a homo-polymerized polypropylene resin
powder, a melt
mass flow rate of the homo-polymerized polypropylene resin under the conditions of 2.16 kg and 230 DEG C is 20-60 g / 10 min, the isotacticity of polypropylene is 95% or more,and Mw / Mn is 4-12. Through the synergistic effect of a small amount of hyper-branched
polyethylene and a small amount of nano-scale white
carbon black added in the composition, the rigidity and
toughness balance of a product is achieved, the
crystallization speed is increased, and the
crystallization behavior of polypropylene is improved, so that the size of resin crystals is finer and denser, thescattering and
refraction of an incident light are reduced, and the glossiness of the product is increased.