Low-temperature impact resistant, cracking resistant and flame-retardant polypropylene material, and preparation method and applications thereof

Abstract

The invention provides a low-temperature impact retardant, cracking retardant and flame-retardant polypropylene material, and a preparation method and applications thereof. The polypropylene materialincludes, by weight, 40-75 parts of polypropylene resin, 2-20 parts of ethylene-octene copolymer (POE), 0-30 parts of a mineral filler, 5-30 parts of a brominated flame retardant, 5-15 parts of a synergistic flame retardant, 0.3-3.5 parts of a stabilizing agent, and 0.5-2 parts of toner. Through the addition of the brominated flame retardant and the synergistic flame retardant, the material can have good flame retardant properties; and through the selection of the specific copolymerized polypropylene resin and the ethylene-octene copolymer (POE) which is taken as a flexibilizer to perform compounding, the material can have good low-temperature impact resistance and cracking resistance, and therefore, the material can be applied to external decorative parts and functional parts of large vehicles such as trucks and engineering trucks.

Description

technical field [0001] The invention belongs to the field of modified plastics, and in particular relates to a low-temperature impact-resistant, crack-resistant, flame-retardant polypropylene material and its preparation method and application, in particular to the application in automotive exterior decoration and functional parts. Background technique [0002] Polypropylene (PP) is currently one of the most widely used and produced general-purpose plastics in the world, because it has the characteristics of low density, excellent mechanical properties, high fluidity, chemical corrosion resistance, good electrical insulation, and easy processing and molding. , It is widely used in the automobile industry, household appliances, electronics, wire and cable, packaging and building materials. However, due to the molecular structure, the limiting oxygen index of polypropylene is only 17.5, and the char formation rate is almost 0. Therefore, it is easy to burn in case of fire, wit...

AI Technical Summary

Problems solved by technology

Since polypropylene is a crystalline polymer, its brittleness is poor at low temperatures, so its products have poor low-temperature impact resistance, which limits its use in low-temperature environments

[0004] Patent CN107286479A prepares a lightweight, high-impact, cold-resistant, high-efficiency flame-retardant polypropylene composition by reducing the particle size of the dispersed phase and improving the impact resistance without adding any toughening agent, but its strength is low, which is not conducive to welding

Patent CN103724806A increases the notched impact strength of the material to 15.0KJ / m by adding a composite toughening agent 2 , but its notched impact strength at -30°C is low, and its low temperature impact resistance is poor

Patent CN101974195A discloses a flame-retardant low-temperature resistant polypropylene material and its preparation method and application, but its notched impact strength is insufficient, and its low-temperature impact performance is poor

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