▎ 摘　　要

NOVELTY - A weather-resistant silicon-based polymer composite material comprises polypropylene with a fat-dissolving index of 25 g/10 minutes, surface-modified silicon powder particles and thermoplastic elastomer. USE - Weather-resistant silicon-based polymer composite material used as injection molding material for preparing automotive bumper (claimed). ADVANTAGE - The composite material uses nano-fumed silica modified silicon powder particles, lubricant, stabilizer and other raw materials by the combination of active groups, the dispersion compatibility of various raw materials in the material is improved. The prepared composite material has large fat-dissolving index, high degree crystallization, and excellent impact resistance.