Halogen-free flame-retardant polypropylene composition as well as preparation and application thereof

Abstract

The invention relates to a halogen-free flame-retardant polypropylene composition as well as preparation and application thereof. The halogen-free flame-retardant polypropylene composition comprises the following components: polypropylene, a flame retardant, a charring agent, a blocking agent, polyether amine and an antioxidant. The halogen-free flame-retardant polypropylene composition disclosed by the invention has relatively good precipitation resistance and good appearance performance.

Description

technical field [0001] The invention belongs to the technical field of modified plastics, in particular to a halogen-free flame-retardant polypropylene composition and its preparation and application. Background technique [0002] As one of the five general-purpose plastics, polypropylene has the advantages of low specific gravity, temperature resistance, corrosion resistance, fatigue resistance, non-toxic safety, and easy processing and molding. It is widely used in household appliances, automobiles, industrial electronics and other industries. However, because the oxygen index of polypropylene resin is low, only about 18, it is a flammable material, so it needs to be modified for flame retardant and fire prevention in the application process of live parts. [0003] Polypropylene flame retardants can be divided into halogen-based, nitrogen-phosphorous, silicon-based, and aluminum-magnesium based on the types of elements. At present, the mainstream is halogen-based and nitro...

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Problems solved by technology

However, due to the low oxygen index of polypropylene resin, only about 18, it is a flammable material, so it is necessary to carry out flame retardant and fireproof modification in the application process of live parts

[0003] Polypropylene flame retardants can be divided into halogen-based, nitrogen-phosphorous, silicon-based, and aluminum-magnesium based on the types of elements. At present, the mainstream is halogen-based and nitrogen-phosphorus-based. Among them, halogen-based flame retardants have higher flame-retardant efficiency, but the combustion Afterwards, there are environmental pollution and toxicity problems, and nitrogen-phosphorus halogen-free flame retardants can also achieve good flame-retardant effects, and more importantly, they are more environmentally friendly and less polluting. Therefore, more and more countries or regions have passed regulations ways to limit the application of halogen-containing flame retardants, and advocate the use of halogen-free flame retardant products

[0004] Among the halogen-free flame retardants, the N-P type has the advantages of non-toxic, tasteless, no corrosive gas, and high thermal stability. It is a halogen-free flame retardant with excellent performance and is widely recognized by the market. The disadvantage is that the degree of polymerization is small, so it has high hygroscopicity, and is prone to hydrolysis or swelling and precipitation. Especially in high temperature and high humidity environments, white crystals will form on the surface after precipitation, which seriously affects the appearance of the product.

At present, the water resistance analysis of ammonium polyphosphate (APP) is mainly solved by chemical modification or physical coating in the industry, but the above two methods are difficult to realize and the cost is greatly increased.

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