Anti-aging anti-precipitation long glass fiber reinforced polypropylene material and preparation method thereof

Abstract

The invention discloses an anti-aging and anti-precipitation long glass fiber reinforced polypropylene material and a preparation method thereof. The material comprises polypropylene, a compatibilizer, a color masterbatch, a thermo-oxygen stabilizer, a light stabilizer, a lubricant and a metal passivation After the agent is melted and dispersed by a twin-screw extruder, it is combined with a long glass fiber through an impregnation die to obtain a long glass fiber reinforced PP. Among them, the compatibilizer can promote the good infiltration of glass fiber and PP and increase the interface strength; the ethylene segment in the copolymerized PP can be better combined with the additive to prevent the migration and precipitation of the additive; the thermal oxygen stabilizer and the metal passivator can inhibit The generation of free radicals prevents the degradation of polypropylene thermal oxygen aging; the light stabilizer can capture the free radicals generated, decompose the hydrogen peroxide compound produced by photoaging, effectively curb the degradation of photoaging, and through the selection of precipitation-resistant lubricants and metal passivators Compounding is carried out to obtain a long glass fiber reinforced PP material that is resistant to aging and precipitation, which can meet the requirements of 120°C@1000h, 100°C@1000h, PV1303 8 cycles of light, no precipitation, stickiness, and no powdering.

Description

technical field [0001] The invention relates to a long glass fiber reinforced polypropylene material and a preparation method thereof, in particular to an anti-aging and anti-precipitation long glass fiber reinforced polypropylene material and a preparation method thereof, belonging to the technical field of composite polymer materials. Background technique [0002] Long glass fiber reinforced polypropylene (LGF-PP) material is welcomed by major OEMs due to its excellent mechanical properties and low density. It has been successfully used in automobiles, home appliances, and tool industries. The main components include front-end modules, Battery brackets, engine covers, sunroof frames, instrument panel frames, washing machine drums, electric tool casings, etc. Under the influence of external conditions such as heat and light, the long glass fiber reinforced polypropylene material will react with oxygen to generate free radicals, and the PP molecular chain will be broken, res...

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Problems solved by technology

[0004] However, there are few reports that long glass fiber reinforced polypropylene materials can meet the requirements of heat-oxidative aging resistance, light aging resistance and precipitation resistance at the same time.

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