A kind of halogen-free flame-retardant polypropylene composition and preparation method thereof

Abstract

The invention discloses a halogen-free flame retardant polypropylene composition and a preparation method thereof. The halogen-free flame retardant polypropylene composition consists of the following raw materials in percentage by weight: 35-74% of polypropylene, 10-30% of inorganic filler, 15-30% of halogen-free flame retardant, 0.1-2% of antioxidant, 0.5-2% of coupling agent and 0-2% of other additives. The halogen-free flame retardant polypropylene composition disclosed by the invention has the advantages that (1) by adding a novel efficient halogen-free flame retardant system into a polypropylene composite material, good flame retardance of the material is obtained while maintaining good mechanical properties; (2) the halogen-free flame retardant polypropylene composition overcomes the environmental pollution and harm to human bodies caused by the traditional halogen flame-retardant polypropylene material, and is nontoxic and environment-friendly; (3) by adopting a flame retardant with relatively low content under the condition of same flame-retardant effect, the material cost of the whole system is reduced.

Description

technical field [0001] The present invention relates to a polypropylene composition, in particular to a halogen-free flame-retardant polypropylene composition, and a method for preparing the composition. The polypropylene composition of the present invention has excellent flame-retardant properties and mechanical properties, and Non-toxic and green environmental protection. Background technique [0002] Because polypropylene has the advantages of excellent physical properties, chemical resistance, easy molding and processing, light weight and low price, these characteristics make it widely used in the fields of home appliances and auto parts. However, polypropylene has disadvantages such as flammability and poor flame retardancy. In today's home appliance and automobile industries, especially the electric vehicle market, which has increasingly high safety requirements, good flame retardancy is undoubtedly a development of materials for home appliances and automobiles in the ...

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Problems solved by technology

Magnesium hydroxide has the advantages of good thermal stability, non-toxic and environmental protection, etc., but its flame retardant efficiency is low, the addition amount is large, and the compatibility with polymers is poor, which will have a negative impact on the mechanical properties of the material

At present, there are also many technologies that use the intumescent flame retardant system compounded by ammonium polyphosphate, pentaerythritol and melamine to flame-retardant polypropylene, but due to the hygroscopic properties of ammonium polyphosphate and pentaerythritol, the application of such flame-retardant systems in polypropylene also got restricted

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