Expanded carbon flame-proof polypropelene composition and preparation method thereof

Abstract

The invention relates to an expansive char-forming 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, 2.8-8.3 weight parts of pentaerythritol, 2.8-8.3 weight parts of melamine cyanurate 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 all components (including polypropylene, ammonium polyphosphate, pentaerythritol, melamine cyanurate and montmorillonite) at the given ratios, 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, and furthermore, relates to an expanded charcoal flame-retardant polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene is a general-purpose plastic with excellent comprehensive properties, but it is a flammable material with a low oxygen index, a high heat release rate during combustion, a high calorific value, a fast flame propagation speed, and is not easy to extinguish, which limits the application of polypropylene. [0003] In the past, the flame-retardant polypropylene was mostly halogen-based flame-retardant, and the addition amount was large, which was not only very harmful to the environment, but also had a negative impact on the mechanical and processing properties of the material. [0004] Intumescent flame retardant polymer is a new flame retardant technology developed on the basis of flame retardant coatings. It blends intumescent f...

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Problems solved by technology

[0005] Early intumescent flame-retardant polypropylene, although environmentally friendly, can overcome the defects of large smoke and many molten droplets when burning halogen-containing flame retardants, but the addition of intumescent flame retardants is still too much. , damages the mechanical properties of flame-retardant polypropylene, and some flame retardants have poor temperature resistance, which has a negative impact on the mechanical and processing properties of the material, which still restricts the application of flame-retardant polypropylene in the fields of automobiles and high-end electronics and electrical appliances

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