Halogen-free expansion type flame-retardant glass fiber reinforced polypropylene material and preparation method thereof

Abstract

The invention discloses a halogen-free expansion type flame-retardant glass fiber reinforced polypropylene material. The polypropylene material is prepared from the following ingredients in percentage by mass: 40%-74% of polypropylene resin, 15%-30% of halogen-free expansion type flame retardant, 0%-6% of flame-retardant synergist, 5%-30% of glass fiber, 0%-20% of filling agent, 5%-15% of compatilizer, 0.2%-0.6% of nucleating agent, 0.3%-1% of antioxidant and 0.5%-2% of lubricating agent. According to the flame-retardant glass fiber reinforced polypropylene material disclosed by the invention, as the quantity of addition of the halogen-free flame retardant is little, the flame-retardant effect is good; and the compounded flame-retardant synergist does not affect the performance of the resin, the flame-retardant performance of the material is improved, the cost can be lowered, no precipitation exists on the surface of the compounded flame-retardant product in long-term storage, so thatthe defect that precipitation exists on the flame-retardant product in long-term storage is overcome, and the advantages of no halogen, environmental friendliness, excellent performance and long-termworkability are achieved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method of a halogen-free intumescent flame-retardant glass fiber reinforced polypropylene material. Background technique [0002] Polypropylene (PP) has become one of the most important general-purpose plastics due to its excellent comprehensive performance, light weight and low price, wide sources, and easy molding and processing. It has developed extremely rapidly in recent years and is widely used in the automobile industry and home appliance industry. , Electronic instrument industry. However, polypropylene is extremely flammable, its oxygen index is only 17.0%-18.0%, and it cannot be extinguished after being caught on fire. Therefore, it must be flame-retardant modified to broaden its application field. [0003] The flame retardant modification of polypropylene is mainly to achieve the purpose of flame retardant by adding a flame retardant to cause a series of...

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Problems solved by technology

The combination of metal hydroxide and resin is poor, and the high addition amount will reduce the mechanical properties of the polymer, which is not conducive to the processing of the polymer; red phosphorus is easy to absorb moisture, oxidize, and emit highly toxic gas, and the dust is easy to explode and is dark red. , so the use is greatly restricted; the cost of silicone-based flame retardants is relatively high; and intumescent flame retardants have attracted market attention because of their relatively small additions and little impact on PP mechanical properties and processing properties.

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