Expansion flame-proof polypropelene composition and preparation method thereof

Abstract

The invention relates to an expansive flame-retardant polypropylene composition and a production method thereof. The composition comprises the following components: 100 weight parts of polypropylene, 10-30 weight parts of ammonium polyphosphate, 3.3-10 weight parts of pentaerythritol, 6.6-20 weight parts of melamine cyanurate, 0.5-5 weight parts of silicone rubber and 0.5-5 weight parts of montmorillonite. The total additional amount of ammonium polyphosphate, pentaerythritol and melamine cyanurate is at least 31 weight parts. The production method comprises the following steps: proportioning the components according to the weight parts, melting, mixing, extruding, and granulating. The composition has better flame retardation, good processability and mechanical property. The production method is simple and reliable.

Description

technical field [0001] The present invention relates to a modified polypropylene, more specifically, to an intumescent flame-retardant polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene (PP) plays an important role in general-purpose resins because of its low price and good comprehensive properties. According to reports, in recent years, the world's polypropylene consumption has reached 22000kt / year. As a general-purpose plastic, polypropylene is not only easy to process and use, but also has very good dielectric properties, so it is widely used in electronic appliances, telecommunications, chemical fiber, petroleum, chemical industry, environmental protection, automobiles and other fields. Due to its unique non-hygroscopicity , It can withstand 150°C under no-load conditions, making its application in household appliances increasing. However, polypropylene is a flammable material with an oxygen index of only 17.4. It ha...

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Problems solved by technology

Halogen-free intumescent flame-retardant polypropylene can form a uniform heat-insulating and oxygen-insulating porous carbon foam protective carbon layer on the surface of the material when it is heated or burned, which can significantly improve the flame retardancy of the material and increase the flame-retardant efficiency , is a flame-retardant polypropylene material that is completely halogen-free and environmentally friendly. However, polypropylene is a non-polar polymer material that hardly becomes charcoal when burned. It is often necessary to add more flame retardants before reaching the UL94V-0 level. Standard, while adding a large amount of intumescent flame retardant to obtain a good flame retardant effect, the performance of the polypropylene material itself is damaged, especially the mechanical properties are often damaged

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