High-gloss scratch-resistant heat-resistant PMMA (polymethyl methacrylate) composite material and preparation method thereof

The invention relates to a high-gloss scratch-resistant heat-resistant PMMA (polymethyl methacrylate) composite material and a preparation method thereof, and the high-gloss scratch-resistant heat-resistant PMMA composite material comprises the following components in parts by weight: PMMA, a flexibilizer, a compatilizer, a heat-resistant agent, a brightener and an auxiliary agent; the flexibilizer has a core-shell structure, the shell is a copolymer of styrene and acrylonitrile, and the core is organosiloxane and acrylic rubber; the particle size of the toughening agent is 80-120nm; the compatilizer is MABS; the heat-resistant agent is a copolymer of alpha-methyl styrene and acrylonitrile; the brightener is EBS; the preparation method comprises the following steps: uniformly mixing the components according to the weight ratio, and extruding and granulating by a twin-screw extruder to obtain the high-gloss scratch-resistant heat-resistant PMMA composite material. The preparation method disclosed by the invent